PWM DC Motor Speed Controller 7-70V 30A Variable Regulator
PWM DC Motor Speed Controller 7-70V 30A Variable Regulator
PWM DC Motor Speed Controller — 7-70V, 30A, Variable Speed Regulator
Take precise control of your DC brush motors with this high-power PWM DC Motor Speed Controller. Designed for a wide voltage range of 7–70V and a maximum drive current of 30A, this compact aluminum-housed module delivers smooth, silent motor speed adjustment for hobbyists, engineers, and industrial users alike. Made in Mainland China.
Key Features
- Wide Voltage & Current Range: Operates across DC 7–80V (70V recommended max operating voltage) and handles up to 30A drive current, making it compatible with a broad range of DC brush motor applications.
- Built-In On/Off & Brake Switch: The on-board switch provides Run, Stop, and Brake functions in one convenient control point — no extra components needed.
- Smooth, Noise-Free Adjustment: A 1%–100% adjustable duty cycle range and 12 kHz PWM frequency ensure fluid speed transitions without audible noise or vibration.
- Detachable Potentiometer Cable: The 15 cm flexible soft cable lets you mount the speed knob remotely for ergonomic, panel-ready installations.
- High-Quality Internal Components: Built with imported high-voltage MOS transistors and three high-frequency, low-resistance capacitors (100V rated) for stable operation, minimal heat generation, and long service life.
- Durable Aluminum Enclosure: The standard aluminum casing shields internal circuitry from physical damage and heat, ensuring reliable performance during extended use.
- Power Indicator Light: Instantly confirms the unit is powered and operational.
Specifications
| Input Voltage Range | DC 7–80V (70V max recommended operating voltage) |
| Max Drive Current | 30A |
| Recommended Control Power | 12V/300W · 24V/400W · 48V/450W · 60V/500W |
| Adjustable Duty Cycle | ~1%–100% |
| PWM Frequency | 12 kHz |
| Shell Dimensions | 85 × 59 × 34 mm (3.35 × 2.32 × 1.34 in) |
| Potentiometer Opening | 8 mm / Knob protrusion height: 16 mm |
| Weight | 145 g |
| Compatible Motor Type | DC Brush Motor only (not suitable for brushless or AC motors) |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × PWM DC Motor Speed Controller Switch
Important Usage Notes
- This controller is designed exclusively for DC brush motors. Do not connect to AC power or use with brushless motors.
- Always observe correct DC polarity on the input terminals. Reversed input polarity may damage the unit.
- Motor output terminals do not require polarity distinction — simply swap the two motor wires to reverse direction if needed.
- Use with an appropriately rated DC power supply. Higher operating voltages will reduce maximum available current; size your power supply accordingly.
- Allow 1–2 cm measurement tolerance due to manual measurement. Slight color variation may occur due to monitor and lighting differences.
For general electrical safety guidance when working with DC controllers and motor circuits, refer to the OSHA Electrical Safety resource.
Frequently Asked Questions
Q: What types of motors are compatible with this PWM DC motor speed controller?
A: This PWM DC motor speed controller is designed specifically for DC brush motors. It is not compatible with brushless DC motors or AC motors. Always verify your motor type before connecting to avoid damage.
Q: What is the maximum voltage and current this speed regulator can handle?
A: The controller supports an input voltage range of DC 7–80V, with 70V as the recommended maximum operating voltage. The maximum drive current is 30A. For higher operating voltages, the maximum current output will be proportionally reduced, so size your load accordingly.
Q: Can I reverse the motor direction using this DC speed regulator?
A: This unit controls motor speed but does not have a built-in direction reversal switch. To reverse the motor rotation direction, simply swap the two output wires connected to the motor terminals.
Q: Is this motor speed controller suitable for 48V or 60V systems?
A: Yes. The controller is rated for 12V/300W, 24V/400W, 48V/450W, and 60V/500W systems, making it highly versatile for a wide range of DC motor applications including electric vehicles, automation, and workshop equipment.