Your PMSM motor is only as good as the controller that drives it. CMVTE motor controllers use dsPIC digital signal processors with Field-Oriented Control (FOC) to deliver smooth torque, instant throttle response, and regenerative braking. Here's what that means for your EV conversion — no engineering degree required.
Why FOC Matters for Your EV
FOC (Field-Oriented Control) decouples torque and magnetic flux in the motor. This means the controller can deliver full torque from 0 RPM, maintain efficiency across the entire speed range, and seamlessly switch between drive and regen. Without FOC, a PMSM motor would cog, vibrate, and waste energy at low speeds.
CMVTE Controller Specs
| Model | Motor Compatibility | Input Voltage | Peak Current | Max Power | FOC | Regen | CAN Bus | Cooling | Price |
|---|---|---|---|---|---|---|---|---|---|
| CMVTE FOC-350A | PMSM-15, PMSM-25 | 96-144V | 350A | 45 kW peak | Yes | Yes | Yes | Fan | $1,200-$1,800 |
| CMVTE FOC-500A | PMSM-35, PMSM-50 | 96-384V | 500A | 80 kW peak | Yes | Yes | Yes | Water | $2,000-$3,000 |
| CMVTE FOC-800A | PMSM-50, PMSM-80 | 144-450V | 800A | 120 kW peak | Yes | Yes | Yes | Water | $3,500-$5,000 |
How CMVTE Controllers Work
Current sensing: High-speed ADC samples motor current 10,000+ times per second. The dsPIC processor runs FOC calculations in real time to adjust voltage and frequency — no lag, no hesitation.
Rotor position estimation: Sensorless FOC uses a back-EMF observer algorithm to track rotor position without a physical sensor. This means no encoder to install, no alignment procedure, and fewer failure points.
Regenerative braking: When you lift off the throttle, the controller reverses the current flow, turning the motor into a generator. Regenerative braking force is adjustable from light (simulates engine braking) to aggressive (one-pedal driving).
What This Means for Your Build
- Smooth start: No jerking or cogging — the car moves from a stop like a factory EV
- Full torque at 0 RPM: Instant acceleration without clutch slipping
- Quiet operation: FOC eliminates the high-pitched whine common with simpler PWM control
- Regen braking: Recover 10-20% of energy and reduce brake pad wear
- CAN bus dashboard: Real-time data on speed, SOC, temperature, and fault codes
Controller Features Comparison
| Feature | Basic PWM Controller | CMVTE FOC Controller |
|---|---|---|
| Torque at 0 RPM | Limited, jerky | Full, smooth |
| Efficiency at low speed | 60-70% | 90-95% |
| Noise | Audible whine | Silent |
| Regenerative braking | Not supported | Adjustable regen |
| Throttle response | Delayed, non-linear | Instant, linear |
| Motor type support | BLDC only | PMSM + BLDC |
Browse CMVTE motor controllers →
Get a Controller Match for Your Motor
Tell us your motor model, battery voltage, and target power. We'll match you to the right FOC controller with wiring diagram and configuration file.
WhatsApp / Phone: +86 181 2358 8272
Email: [email protected]
Mention "Controller" for a motor-controller matching recommendation.
