mirror of
https://github.com/atomic14/kicad-coil-plugins.git
synced 2024-10-18 09:06:57 +00:00
549 lines
19 KiB
Text
549 lines
19 KiB
Text
{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"import pandas as pd\n",
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"import numpy as np\n",
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"\n",
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"# import matplotlib as plt\n",
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"import matplotlib.pyplot as plt\n",
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"from skspatial.objects import LineSegment, Line, Vector\n",
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"\n",
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"# some helper functions\n",
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"from helpers import (\n",
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" get_arc_point,\n",
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" draw_arc,\n",
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" rotate,\n",
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" translate,\n",
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" flip_y,\n",
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" flip_x,\n",
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" optimize_points,\n",
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" chaikin,\n",
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")\n",
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"from pcb_json import (\n",
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" dump_json,\n",
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" plot_json,\n",
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" create_pad,\n",
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" create_silk,\n",
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" create_via,\n",
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" create_mounting_hole,\n",
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" create_pin,\n",
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")\n",
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"\n",
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"from enum import Enum\n",
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"\n",
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"Layer = Enum(\"Layer\", \"FRONT BACK\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"VIA_DIAM = 0.8\n",
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"VIA_DRILL = 0.4\n",
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"# this is for a 1.27mm pitch pin\n",
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"PIN_DIAM = 1.0\n",
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"PIN_DRILL = 0.65\n",
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"\n",
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"# this is for the PCB connector - see https://www.farnell.com/datasheets/2003059.pdf\n",
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"PAD_WIDTH = 6\n",
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"PAD_HEIGHT = 2\n",
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"PAD_PITCH = 2.5\n",
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"\n",
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"# PCB Edge size\n",
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"STATOR_RADIUS = 23\n",
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"SCREW_HOLE_RADIUS = 20\n",
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"SCREW_HOLE_DRILL_DIAM = 3.2 # 3.2mm drill for a 3mm screw\n",
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"STATOR_HOLE_RADIUS = 5\n",
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"\n",
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"# where to put the input pads\n",
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"INPUT_PAD_RADIUS = 19.5\n",
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"\n",
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"# Track width and spacing\n",
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"TRACK_WIDTH = 0.127\n",
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"TRACK_SPACING = 0.127\n",
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"\n",
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"# Coil params\n",
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"TURNS = 18\n",
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"COIL_CENTER_RADIUS = 11.5\n",
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"\n",
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"# where do we want to stop routing any tracks?\n",
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"MAX_TRACK_RADIUS = SCREW_HOLE_RADIUS - (SCREW_HOLE_DRILL_DIAM / 2 + TRACK_SPACING * 2)\n",
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"\n",
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"# where to place the pins\n",
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"CONNECTION_PINS_RADIUS = 16.5\n",
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"\n",
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"USE_SPIRAL = False"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Arbitrary Coil Generation"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"# templates must be simetric around the X axis and must include the center points on both size (e.g. (X1, 0).... (X2, 0) )\n",
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"# template must also be convex\n",
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"template = [\n",
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" (-0.6, 0),\n",
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" (-0.6, -0.6),\n",
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" (0.5, -1.2),\n",
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" (0.95, -0.4),\n",
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" (0.95, 0),\n",
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" (0.95, 0.4),\n",
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" (0.5, 1.2),\n",
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" (-0.6, 0.6),\n",
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"]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"# plot the template shape wrapping around to the first point\n",
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"df = pd.DataFrame(template + [template[0]], columns=[\"x\", \"y\"])\n",
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"ax = df.plot.line(x=\"x\", y=\"y\", color=\"blue\")\n",
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"ax.axis(\"equal\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"def calculate_point(point, point1, point2, spacing, turn):\n",
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" reference_vector = Vector([-100, 0])\n",
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" angle = np.rad2deg(Vector(point).angle_between(reference_vector))\n",
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" if point[1] > 0:\n",
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" angle = 360 - angle\n",
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" vector = Vector(point1) - Vector(point2)\n",
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" normal = vector / np.linalg.norm(vector)\n",
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" # rotate the vector 90 degrees\n",
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" normal = np.array([-normal[1], normal[0]])\n",
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" # move the point along the normal vector by the spacing\n",
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" offset = spacing * (turn * 360 + angle) / 360\n",
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" coil_point = point + normal * offset\n",
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" return (coil_point[0], coil_point[1])\n",
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"\n",
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"\n",
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"def get_points(template, turns, spacing):\n",
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" coil_points = []\n",
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" reference_vector = Vector([-100, 0])\n",
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" template_index = 0\n",
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" template_length = len(template)\n",
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" for turn in range(turns * template_length):\n",
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" point1 = template[template_index % template_length]\n",
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" point2 = template[(template_index + 1) % template_length]\n",
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"\n",
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" # calculate the new positions of the points\n",
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" coil_point1 = calculate_point(\n",
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" point1, point1, point2, spacing, template_index // template_length\n",
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" )\n",
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" coil_point2 = calculate_point(\n",
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" point2, point1, point2, spacing, (template_index + 1) // template_length\n",
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" )\n",
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" # adjust the previous point so that the previous line intersects with this new line\n",
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" # this prevents any cutting of corners\n",
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" if len(coil_points) >= 2:\n",
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" # create a line from the previous two points\n",
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" line1 = Line(\n",
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" coil_points[len(coil_points) - 2],\n",
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" np.array(coil_points[len(coil_points) - 1])\n",
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" - np.array(coil_points[len(coil_points) - 2]),\n",
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" )\n",
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" # create a line from the two new points\n",
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" line2 = Line(\n",
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" np.array(coil_point1),\n",
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" np.array(np.array(coil_point1) - np.array(coil_point2)),\n",
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" )\n",
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" # find the intersection of the two lines\n",
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" try:\n",
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" intersection = line1.intersect_line(line2)\n",
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" # replace the previous point with the intersection\n",
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" coil_points[len(coil_points) - 1] = intersection\n",
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" # add the new point\n",
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" coil_points.append(coil_point2)\n",
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" except:\n",
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" # the lines did not intersect so just add the points\n",
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" coil_points.append(coil_point1)\n",
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" coil_points.append(coil_point2)\n",
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" else:\n",
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" coil_points.append(coil_point1)\n",
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" coil_points.append(coil_point2)\n",
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"\n",
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" template_index = template_index + 1\n",
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" return coil_points"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"if not USE_SPIRAL:\n",
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" template_f = []\n",
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" for i in range(len(template)):\n",
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" template_f.append(template[len(template) - i - len(template) // 2])\n",
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" template_f = flip_x(template_f)\n",
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" points_f = chaikin(\n",
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" optimize_points(\n",
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" flip_x(get_points(template_f, TURNS, TRACK_SPACING + TRACK_WIDTH))\n",
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" ),\n",
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" 2,\n",
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" )\n",
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" points_b = chaikin(\n",
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" optimize_points(get_points(template, TURNS, TRACK_SPACING + TRACK_WIDTH)), 2\n",
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" )\n",
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"\n",
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" points_f = [(0, 0)] + points_f\n",
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" points_b = [(0, 0)] + points_b\n",
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"\n",
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" df = pd.DataFrame(points_f, columns=[\"x\", \"y\"])\n",
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" ax = df.plot.line(x=\"x\", y=\"y\", color=\"blue\")\n",
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" ax.axis(\"equal\")\n",
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" df = pd.DataFrame(points_b, columns=[\"x\", \"y\"])\n",
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" ax = df.plot.line(x=\"x\", y=\"y\", color=\"red\", ax=ax)\n",
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"\n",
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" print(\"Track points\", len(points_f), len(points_b))\n",
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"else:\n",
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" print(\"Using spiral\")"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Basic Spiral Coil Generation"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"def get_spiral(turns, start_radius, thickness, layer=Layer.FRONT):\n",
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" points = []\n",
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" # create a starting point in the center\n",
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" for angle in np.arange(0, turns * 360, 1):\n",
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" radius = start_radius + thickness * angle / 360\n",
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" if layer == Layer.BACK:\n",
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" x = radius * np.cos(np.deg2rad(angle + 180))\n",
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" y = radius * np.sin(np.deg2rad(angle + 180))\n",
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" points.append((x, -y))\n",
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" else:\n",
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" x = radius * np.cos(np.deg2rad(angle))\n",
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" y = radius * np.sin(np.deg2rad(angle))\n",
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" points.append((x, y))\n",
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" return points"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"if USE_SPIRAL:\n",
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" points_f = get_spiral(\n",
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" TURNS, VIA_DIAM / 2 + TRACK_SPACING, TRACK_SPACING + TRACK_WIDTH, Layer.FRONT\n",
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" )\n",
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" points_b = get_spiral(\n",
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" TURNS, VIA_DIAM / 2 + TRACK_SPACING, TRACK_SPACING + TRACK_WIDTH, Layer.BACK\n",
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" )\n",
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"\n",
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" points_f = [(0, 0)] + points_f\n",
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" points_b = [(0, 0)] + points_b\n",
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" print(\"Track points\", len(points_f), len(points_b))\n",
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"else:\n",
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" print(\"Using template\")"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Generate PCB Layout"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"# calculat the total length of the track to compute the resistance\n",
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"total_length_front = 0\n",
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"for i in range(len(points_f) - 1):\n",
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" total_length_front += np.linalg.norm(\n",
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" np.array(points_f[i + 1]) - np.array(points_f[i])\n",
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" )\n",
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"print(\"Total length front\", total_length_front)\n",
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"\n",
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"total_length_back = 0\n",
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"for i in range(len(points_b) - 1):\n",
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" total_length_back += np.linalg.norm(\n",
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" np.array(points_b[i + 1]) - np.array(points_b[i])\n",
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" )\n",
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"print(\"Total length back\", total_length_back)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"vias = []\n",
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"tracks_f = []\n",
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"tracks_b = []\n",
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"pins = []\n",
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"pads = []\n",
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"\n",
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"angle_A = 0\n",
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"angle_B = 120\n",
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"angle_C = 240\n",
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"\n",
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"# the main coils\n",
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"coil_A_f = translate(rotate(points_f, angle_A), COIL_CENTER_RADIUS, angle_A)\n",
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"coil_A_b = translate(rotate(points_b, angle_A), COIL_CENTER_RADIUS, angle_A)\n",
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"tracks_f.append(coil_A_f)\n",
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"tracks_b.append(coil_A_b)\n",
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"\n",
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"coil_B_f = translate(rotate(points_f, angle_B), COIL_CENTER_RADIUS, angle_B)\n",
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"coil_B_b = translate(rotate(points_b, angle_B), COIL_CENTER_RADIUS, angle_B)\n",
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"tracks_f.append(coil_B_f)\n",
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"tracks_b.append(coil_B_b)\n",
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"\n",
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"coil_C_f = translate(rotate(points_f, angle_C), COIL_CENTER_RADIUS, angle_C)\n",
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"coil_C_b = translate(rotate(points_b, angle_C), COIL_CENTER_RADIUS, angle_C)\n",
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"tracks_f.append(coil_C_f)\n",
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"tracks_b.append(coil_C_b)\n",
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"\n",
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"# the opposite coils - for more power!\n",
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"angle_A_opp = angle_A + 180\n",
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"angle_B_opp = angle_B + 180\n",
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"angle_C_opp = angle_C + 180\n",
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"\n",
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"coil_A_opp_f = translate(\n",
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" rotate(flip_y(points_f), angle_A_opp), COIL_CENTER_RADIUS, angle_A_opp\n",
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")\n",
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"coil_A_opp_b = translate(\n",
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" rotate(flip_y(points_b), angle_A_opp), COIL_CENTER_RADIUS, angle_A_opp\n",
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")\n",
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"tracks_f.append(coil_A_opp_f)\n",
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"tracks_b.append(coil_A_opp_b)\n",
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"\n",
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"coil_B_opp_f = translate(\n",
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" rotate(flip_y(points_f), angle_B_opp), COIL_CENTER_RADIUS, angle_B_opp\n",
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")\n",
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"coil_B_opp_b = translate(\n",
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" rotate(flip_y(points_b), angle_B_opp), COIL_CENTER_RADIUS, angle_B_opp\n",
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")\n",
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"tracks_f.append(coil_B_opp_f)\n",
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"tracks_b.append(coil_B_opp_b)\n",
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"\n",
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"coil_C_opp_f = translate(\n",
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" rotate(flip_y(points_f), angle_C_opp), COIL_CENTER_RADIUS, angle_C_opp\n",
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")\n",
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"coil_C_opp_b = translate(\n",
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" rotate(flip_y(points_b), angle_C_opp), COIL_CENTER_RADIUS, angle_C_opp\n",
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")\n",
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"tracks_f.append(coil_C_opp_f)\n",
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"tracks_b.append(coil_C_opp_b)\n",
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"\n",
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"# connect the front and back coils together\n",
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"vias.append(create_via(get_arc_point(angle_A, COIL_CENTER_RADIUS)))\n",
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"vias.append(create_via(get_arc_point(angle_B, COIL_CENTER_RADIUS)))\n",
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"vias.append(create_via(get_arc_point(angle_C, COIL_CENTER_RADIUS)))\n",
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"vias.append(create_via(get_arc_point(angle_A_opp, COIL_CENTER_RADIUS)))\n",
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"vias.append(create_via(get_arc_point(angle_B_opp, COIL_CENTER_RADIUS)))\n",
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"vias.append(create_via(get_arc_point(angle_C_opp, COIL_CENTER_RADIUS)))\n",
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"\n",
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"# connect the front copper opposite coils together\n",
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"common_connection_radius = MAX_TRACK_RADIUS - (VIA_DIAM / 2 + TRACK_SPACING)\n",
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"common_coil_connections_b = draw_arc(angle_A_opp, angle_C_opp, common_connection_radius)\n",
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"coil_A_opp_f.append(get_arc_point(angle_A_opp, common_connection_radius))\n",
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"coil_B_opp_f.append(get_arc_point(angle_B_opp, common_connection_radius))\n",
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"coil_C_opp_f.append(get_arc_point(angle_C_opp, common_connection_radius))\n",
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"\n",
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"tracks_b.append(common_coil_connections_b)\n",
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"\n",
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"vias.append(create_via(get_arc_point(angle_A_opp, common_connection_radius)))\n",
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"vias.append(create_via(get_arc_point(angle_B_opp, common_connection_radius)))\n",
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"vias.append(create_via(get_arc_point(angle_C_opp, common_connection_radius)))\n",
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"\n",
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"# wires for connecting to opposite coils\n",
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"connection_radius1 = STATOR_HOLE_RADIUS + (2 * TRACK_SPACING)\n",
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"connection_radius2 = connection_radius1 + (TRACK_SPACING + VIA_DIAM / 2)\n",
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"\n",
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"# draw a 45 degree line from each coil at connection radius 1\n",
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"# then connect up to connection radius 2\n",
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"# draw a 45 degree line to the opposite coil\n",
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"\n",
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"# coil A\n",
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"coil_A_b.append(get_arc_point(angle_A, connection_radius1))\n",
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"coil_A_opp_b.append(get_arc_point(angle_A_opp, connection_radius2))\n",
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"a_connection_b = draw_arc(angle_A, angle_A + 90, connection_radius1)\n",
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"a_connection_f = draw_arc(angle_A + 90, angle_A + 180, connection_radius2)\n",
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"a_connection_b.append(a_connection_f[0])\n",
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"\n",
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"tracks_f.append(a_connection_f)\n",
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"tracks_b.append(a_connection_b)\n",
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"\n",
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"# coil B\n",
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"coil_B_b.append(get_arc_point(angle_B, connection_radius1))\n",
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"coil_B_opp_b.append(get_arc_point(angle_B_opp, connection_radius2))\n",
|
|
"b_connection_b = draw_arc(angle_B, angle_B + 90, connection_radius1)\n",
|
|
"b_connection_f = draw_arc(angle_B + 90, angle_B + 180, connection_radius2)\n",
|
|
"b_connection_b.append(b_connection_f[0])\n",
|
|
"\n",
|
|
"tracks_f.append(b_connection_f)\n",
|
|
"tracks_b.append(b_connection_b)\n",
|
|
"\n",
|
|
"# coil C\n",
|
|
"coil_C_b.append(get_arc_point(angle_C, connection_radius1))\n",
|
|
"coil_C_opp_b.append(get_arc_point(angle_C_opp, connection_radius2))\n",
|
|
"c_connection_b = draw_arc(angle_C, angle_C + 90, connection_radius1)\n",
|
|
"c_connection_f = draw_arc(angle_C + 90, angle_C + 180, connection_radius2)\n",
|
|
"c_connection_b.append(c_connection_f[0])\n",
|
|
"\n",
|
|
"tracks_f.append(c_connection_f)\n",
|
|
"tracks_b.append(c_connection_b)\n",
|
|
"\n",
|
|
"vias.append(create_via(a_connection_f[0]))\n",
|
|
"vias.append(create_via(b_connection_f[0]))\n",
|
|
"vias.append(create_via(c_connection_f[0]))\n",
|
|
"\n",
|
|
"vias.append(create_via(a_connection_f[-1]))\n",
|
|
"vias.append(create_via(b_connection_f[-1]))\n",
|
|
"vias.append(create_via(c_connection_f[-1]))\n",
|
|
"\n",
|
|
"silk = [\n",
|
|
" create_silk(get_arc_point(angle_A, COIL_CENTER_RADIUS), \"A\"),\n",
|
|
" create_silk(get_arc_point(angle_B, COIL_CENTER_RADIUS), \"B\"),\n",
|
|
" create_silk(get_arc_point(angle_C, COIL_CENTER_RADIUS), \"C\"),\n",
|
|
"]\n",
|
|
"\n",
|
|
"# create mounting holes at 45 degree angles\n",
|
|
"mounting_holes = [\n",
|
|
" create_mounting_hole(get_arc_point(angle, SCREW_HOLE_RADIUS), SCREW_HOLE_DRILL_DIAM)\n",
|
|
" for angle in [45, 135, 225, 315]\n",
|
|
"]\n",
|
|
"\n",
|
|
"# create the pads for connecting the inputs to the coils\n",
|
|
"silk.append(\n",
|
|
" create_silk((-PAD_PITCH, INPUT_PAD_RADIUS - PAD_HEIGHT - 2.5), \"C\", \"b\", 2.5)\n",
|
|
")\n",
|
|
"pads.append(create_pad((-PAD_PITCH, INPUT_PAD_RADIUS), PAD_HEIGHT, PAD_WIDTH, \"b\"))\n",
|
|
"\n",
|
|
"silk.append(create_silk((0, INPUT_PAD_RADIUS - PAD_HEIGHT - 2.5), \"B\", \"b\", 2.5))\n",
|
|
"pads.append(create_pad((0, INPUT_PAD_RADIUS), PAD_HEIGHT, PAD_WIDTH, \"b\"))\n",
|
|
"\n",
|
|
"silk.append(\n",
|
|
" create_silk((PAD_PITCH, INPUT_PAD_RADIUS - PAD_HEIGHT - 2.5), \"A\", \"b\", 2.5)\n",
|
|
")\n",
|
|
"pads.append(create_pad((PAD_PITCH, INPUT_PAD_RADIUS), PAD_HEIGHT, PAD_WIDTH, \"b\"))\n",
|
|
"\n",
|
|
"# connect coil A to the middle pad\n",
|
|
"input_pad_connection_radius = SCREW_HOLE_RADIUS + SCREW_HOLE_DRILL_DIAM / 2 + 0.5\n",
|
|
"tracks_f.append(\n",
|
|
" draw_arc(angle_A, 80, input_pad_connection_radius, 5)\n",
|
|
" + [(PAD_PITCH, INPUT_PAD_RADIUS + VIA_DIAM)]\n",
|
|
")\n",
|
|
"# connect coil B to the middle pad\n",
|
|
"tracks_f.append(draw_arc(90, angle_B, INPUT_PAD_RADIUS, 5))\n",
|
|
"# connect coil C to the bottom pad\n",
|
|
"tracks_f.append(\n",
|
|
" [(-PAD_PITCH, INPUT_PAD_RADIUS + VIA_DIAM)]\n",
|
|
" + draw_arc(100, angle_C, input_pad_connection_radius, 5)\n",
|
|
")\n",
|
|
"coil_A_f.append(get_arc_point(angle_A, input_pad_connection_radius))\n",
|
|
"coil_B_f.append(get_arc_point(angle_B, INPUT_PAD_RADIUS))\n",
|
|
"coil_C_f.append(get_arc_point(angle_C, input_pad_connection_radius))\n",
|
|
"vias.append(create_via((-PAD_PITCH, INPUT_PAD_RADIUS + VIA_DIAM)))\n",
|
|
"vias.append(create_via((0, INPUT_PAD_RADIUS)))\n",
|
|
"vias.append(create_via((PAD_PITCH, INPUT_PAD_RADIUS + VIA_DIAM)))"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": null,
|
|
"metadata": {},
|
|
"outputs": [],
|
|
"source": [
|
|
"# dump out the json version\n",
|
|
"json_result = dump_json(\n",
|
|
" \"coils_6.json\",\n",
|
|
" STATOR_RADIUS,\n",
|
|
" STATOR_HOLE_RADIUS,\n",
|
|
" TRACK_WIDTH,\n",
|
|
" PIN_DIAM,\n",
|
|
" PIN_DRILL,\n",
|
|
" VIA_DIAM,\n",
|
|
" VIA_DRILL,\n",
|
|
" vias,\n",
|
|
" pins,\n",
|
|
" pads,\n",
|
|
" silk,\n",
|
|
" tracks_f,\n",
|
|
" tracks_b,\n",
|
|
" mounting_holes,\n",
|
|
")"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": null,
|
|
"metadata": {},
|
|
"outputs": [],
|
|
"source": [
|
|
"# plot the json\n",
|
|
"plot_json(json_result)"
|
|
]
|
|
}
|
|
],
|
|
"metadata": {
|
|
"kernelspec": {
|
|
"display_name": "Python 3.10.7 ('venv': venv)",
|
|
"language": "python",
|
|
"name": "python3"
|
|
},
|
|
"language_info": {
|
|
"codemirror_mode": {
|
|
"name": "ipython",
|
|
"version": 3
|
|
},
|
|
"file_extension": ".py",
|
|
"mimetype": "text/x-python",
|
|
"name": "python",
|
|
"nbconvert_exporter": "python",
|
|
"pygments_lexer": "ipython3",
|
|
"version": "3.10.7"
|
|
},
|
|
"vscode": {
|
|
"interpreter": {
|
|
"hash": "fc384f9db26c31784edfba3761ba3d2c7b2f9b8a63e03a9eb0778fc35334efe1"
|
|
}
|
|
}
|
|
},
|
|
"nbformat": 4,
|
|
"nbformat_minor": 2
|
|
}
|