High safety and high efficiency are the constant pursuit of the electric vehicle / e-bike controller industry. To meet market demand, we offer an electric vehicle / e-bike motor controller solution using single-shunt current sampling. On the software side, the motor starts with Hall sensors and then runs in sensorless single-shunt FOC, delivering safety and reliability, high efficiency and low cost.
Key Points
- Electrical specs: 13-48V, supports motors up to 1.5KW
- Single-shunt sensorless FOC control algorithm
- Stable and reliable startup with 50N.m high torque
- Sensored startup, sensorless operation
- Ultra-quiet control and low torque-ripple control technology
- Low heat generation, high efficiency
- Constant-current and constant-power control technology
- Dynamic self-test and static self-test functions
- MOSFET protection, phase-to-phase protection, stall protection and Hall phase-loss protection
- Overvoltage, undervoltage, overcurrent and other hardware/software protections
- Complete software and hardware design reference
Solution Overview
The hardware architecture of this solution consists of power conversion, pre-driver, MOSFET bridge, op-amps and Hall detection circuitry. Instrument cluster display is implemented over CAN communication, keys handle power on/off and gear selection, and the throttle grip provides motor speed control.
Recommended MCU
- S32K14x Series
- S12ZVM Series (alternative)
- KEA Series (alternative)
Core Components
- Automotive MCU: NXP, GD, etc., full part number available on request
- CAN transceiver: NXP, full part number available on request
- MOSFET: ON, full part number available on request
- MOSFET pre-driver: MPS, full part number available on request
- Op-amp: ON, full part number available on request
- DC-DC: MPS, full part number available on request
Applications
Electric vehicles, e-bikes
Reference Design AMC-48x50-24
- Improved Hall sine-wave startup algorithm, capable of starting under heavy load
- FOC drive at medium and high speeds, saving 5%-20% more power than square-wave drive
Functional Block Diagram
