Project Owners: Mena Azab Rayyan Mahmood
Requirements:
Can take 6S voltage
Can handle 50 A continuous
Create block diagram
Show the high-level process of how the motor controller works from receiving a battery voltage to controlling the phases of the motor
Create table for engineering decisions and tradeoffs for the following components:
MCU
We ordered an MCU that was to be used for the 4S ESC that was being designed, can potentially use this chip: https://www.digikey.ca/en/products/detail/stmicroelectronics/STM32L412KBT6/9656219
Gate driver IC
Does it have field-oriented control?
Does it have built in current sense? That would be extremely useful so that we don’t have to waste board space using a current sense amplifier and shunt
Power MOSFETs
Buck converter for MCU
Battery input connection type
PWM connection type
Programming pins connection type
Component Selection
Buck:
Part Number | Price | Comments |
---|---|---|
Already in the bay | Buck IC | |
RC0805FR-071ML | $0.16 | R1(1MΩ) - Upper resistor in voltage divider; by Vin |
RC0805FR-07130KL | $0.16 | R2(130KΩ) - Lower resistor in voltage divider; by Vin |
CL10B104KB8NNNC | $0.15 | CVD & CBST - 0.1µF x2 |
TYS8040151M-10 | $1 | L1 (150µF) - Inductor |
GRM21BR61H106KE43L | $0.44 | Cin(10µF) - Ceramic Cap , 50V |
TR3D476K016C0100 | $2.14 | Cout(47uf @ 100mOhm ESR) - Tantalum |
B240A-FDITR-ND | $0.63 | D1 - B240/A recommended by datasheet |
RC0805FR-1324KL | $0.16 | R3(24kΩ) - Upper resistor in feedback voltage divider |
RC0805FR-0714KL | $0.16 | R4(14kΩ) - Lower resistor in feedback voltage divider |
MCU:
Part Number | Price | Comments |
---|---|---|
STM32L412KBT6 | Already orderd && in the bay | same mcu as 4s esc with same passives |
Current Sense:
Part Number | Price | Comments |
---|---|---|
Already orderd && in the bay | same current sense IC as 4s esc | |
WSR31L000FEA | $2.41 | 1mOhms, 3W shunt resistor |
CL10B104KB8NNNC | $0.15 | Bypass Cap and filter caps, 0.1uF x2 |
RC0603FR-0710KL | $0.16 | Filter resistor, 10kOhms, 1/10W |
Gate Driver:
Part Number | Price | Comments |
---|---|---|
DRV8328BRUYR | already ordered | same gate driver as 4s esc |
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MOSFET:
Part Number | Price | Vds | Rds(on) | Continuous Current | Output Charge (nC) | Gate Charge (nC) | Rise time | Fall time | Comments |
---|---|---|---|---|---|---|---|---|---|
1.13 | 30V | 3.5mOhm @ 10V | 60A |
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2.2 | 30V | 8mOhm @ 10V | 55A | Wider package size | |||||
Conduction Loss:
Gate Charge Loss:
Output Capacitance Loss:
Switching Transition Loss: