DC PWM Motor Speed Controller – 10–60 V DC, 20 A, 1200 W – Support Documentation
Description
This DC motor speed controller uses pulse-width modulation (PWM) to adjust the speed of DC motors. It operates on a wide input voltage from 10 V to 60 V and delivers up to 20 A (continuous current approximately 18 A), supporting motor power up to 1200 W. Speed is adjusted manually via the built-in potentiometer knob.
Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | DC 10–60 V |
| Maximum Output Current | 20 A |
| Continuous Current | ~18 A |
| Maximum Power | 1200 W |
| PWM Frequency | ~25 kHz |
| Speed Control | Linear potentiometer knob |
| Speed Range | 0 % to 100 % |
| Dimensions | Approximately 77 × 45 × 28 mm |
| Protection Features | Removable fuse for overload protection |
Pin-Out & Wiring
Typical terminal block layout (barrier-style):
- Power+: Connect to DC positive supply (10–60 V).
- Power−: Connect to DC ground.
- Motor+: Connect to motor positive terminal.
- Motor−: Connect to motor negative terminal.
Ensure correct polarity and secure connections. Use an inline fuse or breaker for additional safety at high currents.
Usage & Setup
- Connect the motor and power source as per the pin-out above.
- Turn the potentiometer knob clockwise to increase motor speed, counterclockwise to decrease.
- Start from zero speed and ramp up gradually to avoid inrush currents.
- Include a fuse, and consider adequate ventilation or heatsinking if running near continuous current limits.
Troubleshooting
- No motor movement: Check power connections, ensure supply voltage is within range, confirm fuse integrity.
- Motor only runs at low speed: Verify potentiometer functionality and inspect wiring continuity.
- Overheating or thermal shutdown: Reduce load, ensure airflow, or add a heatsink.
- Blown fuse: Investigate for shorts or overload conditions and replace with correct rating.
FAQs
- Can it be controlled remotely, e.g., via microcontroller?
- Not directly—this model uses a manual knob for control. For remote control, consider a controller with an external PWM input.
- Is reverse motor direction supported?
- No—the controller does not reverse polarity. A proper H-bridge is required for bidirectional control.
- Can it run on a 24 V system?
- Yes—just ensure motor current stays within limits and use cooling if necessary.