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Project description
https://github.com/ihartwig/razor18-firmware
## EMF Conditioning Low Pass
R16/C8 form a low pass filter. R78 should be left open.
Motor is 1720Kv * 21V = 36120 rpm
Connected to 6:1 gearing = 6020 rpm wheel speed
Wheels are 125mm = 0.410104987ft diameter. 1.28838ft circumference.
7756 ft/m = 129.26 ft/s = 87.95 mph -> clearly, this free speed won't happen in real life
36120 rpm = 602 rev/s
2 cycles per revolution: 1204 rev/s
2 kHz filter with 100kohm resistor: R = 8.2kohm, C = 0.01uF
## Current Sense Amplifier
uC has a 2.56V ADC reference
Shunt Resistor (.0005 ohm)
100A max current: 0.05V in to amp -> need 51x amplification
R1 = 1k, R2 = 50k
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Component (24)
Qty
Description
Resistor
R28, R20, R49, R38, R11, R42, R44, R6, R56, R17, R54, R74, R52, R12, R75, R39, R53, R66, R71, R70, R73, R18, R76, R32, R55, R10, R72, R9, R4, R8, R43, R50, R14, R62, R3, R64, R15, R67, R41, R57, R40, R68, R19, R1, R5, R2, R16, R69, R27, R31, R29, R45, R37, R7, R77, R51, R13
57
Generic Resistor (100)
Diode
D10, D5, D14, D3, D8, D9, D6, D13, D15, D2, D4, D12, D11, D1, D7
15
Generic Diode
IRS10752LTRPBF
U16, U20, U23
3
Standard
Resistor
R83, R81, R82
3
Generic Resistor (330)
