12-30VDC 7A PWM DC Motor Speed Controller Regulator with On-board Potentiometer and On/Off Switch

This section provides a comprehensive guide to using your 12-30VDC 7A PWM DC Motor Speed Controller. This controller allows you to precisely control the speed of your DC motors using Pulse Width Modulation (PWM) technology. It is designed for a wide range of applications, from hobby projects to small manufacturing setups.

Introduction

This PWM DC Motor Speed Controller allows you to easily adjust the speed of a DC motor within a 12-30VDC range. The speed is controlled by adjusting the duty cycle of the PWM signal using the on-board potentiometer. The controller is equipped with several features to ensure reliable and safe operation, including over-current, over-temperature, and short-circuit protection.

Features

High Current Capacity: Handles an average continuous current of 7A and a peak current of 10A, ideal for controlling high-power DC motors. Ensures efficient and reliable performance even under demanding conditions.
Wide Voltage Range (12-30V DC): Compatible with a broad range of power supplies and DC motors, offering flexibility for diverse applications.
Precise PWM Speed Control: Fine-tune your motor’s speed with the adjustable duty cycle (5%-100%) using the onboard potentiometer. Achieve smooth and accurate speed adjustments for optimal performance.
Integrated On/Off Switch: Conveniently turn the controller on and off with the built-in switch integrated into the potentiometer (fully counter-clockwise click).
Built-in Protection: Features overload, over-temperature, and short-circuit protection, safeguarding your motor and system from potential damage and extending motor lifespan.
Durable and Reliable Design: Built with high-quality components and a robust circuit design for exceptional durability and long-lasting performance.
Power Indicator LED: On-board LED illuminates when power is applied and the controller is turned on, providing a visual indication of operation.
Easy to Use: Simple to install and operate, making it suitable for both beginners and experienced users.

Specifications

Input supply voltage: 12-30 VDC
Maximum continuous output current: 7A, 10A Peak
Duty Cycle (Speed Range): Adjustable 5% to 100%
On/Off switch: Built into potentiometer (fully counter-clockwise clicks off)
Power Indicator: On-board LED illuminates when power is applied to the module and the module is turned on
Dimensions: 50mm x 32mm x 19mm (1.97in x 1.26in x 0.75in) (LxWxH) excluding potentiometer shaft

Safety Precautions

Voltage Limits: Ensure the input voltage is within the specified range of 12-30VDC. Exceeding this voltage can damage the controller.
Current Limits: Do not exceed the maximum continuous output current of 7A or the peak current of 10A. Doing so may trigger the over-current protection or damage the controller.
Polarity: Ensure correct polarity when connecting the power supply to the “Power +” and “Power -” terminals. Reverse polarity can damage the controller.
Fuse Protection: Important: We strongly recommend adding an appropriately rated fuse inline with the positive supply to protect the circuit from potential short circuits. Choose a fuse rated slightly above the expected continuous current draw of your motor.
Heat Dissipation: For continuous operation at high currents, consider adding a heatsink to the controller to prevent overheating.
Grounding: Ensure proper grounding of the power supply.
Operating Environment: Avoid operating the controller in excessively humid or dusty environments.

Operating Instructions

Step 1: Power Off

Turn the potentiometer fully counter-clockwise until it clicks. This ensures the module is turned off before making any connections.

Step 2: Motor Connection

Connect your DC motor (or DC load) to the “Motor +” and “Motor -” terminals as labeled on the back of the circuit board.

Step 3: Power Connection

Connect a DC voltage of 12V-30V to the “Power +” and “Power -” terminals. Ensure correct polarity. The voltage applied to the motor will be the same as the supply voltage.
Critical Note: The ground connections to the power supply and the motor must be separate connections. Do not tie the “Power -” and “Motor -” connections together; otherwise, the controller will not function correctly. See the connection diagram below.

Step 4: Fuse Installation (Highly Recommended)

Install an appropriately rated fuse in-line with the positive (Power +) supply wire. This will protect the controller and your motor from short circuits.

Step 5: Power On and Speed Control

Turn the unit on by rotating the potentiometer clockwise. The on-board power LED should illuminate, indicating that the controller is powered on.
You can now control the motor’s speed by adjusting the potentiometer. Rotating the potentiometer clockwise increases the motor speed, while rotating it counter-clockwise decreases the speed.

Troubleshooting

Motor not running:
- Verify that the power supply is connected and providing the correct voltage (12-30V DC).
- Ensure the controller is turned on (potentiometer rotated clockwise).
- Check the motor connections for correct polarity and secure connections.
- Verify that the “Power -” and “Motor -” connections are separate and not tied together.
- Check the fuse (if installed) and replace if necessary.
- If the LED is not lit, there is no power to the controller.
Motor running erratically:
- Check for loose connections.
- Ensure the power supply voltage is stable.
- The motor may be drawing too much current. Try a smaller motor or a higher-rated controller.
Controller overheating:
- Reduce the motor load or use a lower voltage.
- Consider adding a heat sink to the controller.
- The motor may be drawing too much current.

Where to Buy the 12-30VDC 7A PWM DC Motor Speed Controller

12-30VDC 7A PWM DC Motor Speed Controller on the Envistia Mall website:

https://envistiamall.com/products/12-30vdc-7a-pwm-dc-motor-speed-controller

P/N EM-MOTOR-0009

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