1. Introduction
The DEWIN PWM Motor Driver (Model ZK-MG) is a versatile DC motor speed controller designed for precise regulation of motor speed. It features a digital display, a rotary encoder for adjustment, and a start-stop button. This module is suitable for various applications requiring adjustable DC motor speed control within its specified voltage and current limits.
Key features include:
- Start-Stop Button: Integrated start-stop button with external switch control capability.
- Soft Start Function: Gradually increases current upon startup to protect the motor and extend its lifespan.
- Adjustable Parameters: Duty cycle, upper and lower duty cycle limits, and working frequency are all settable.
- Digital Rotary Encoder: Provides high precision and repeatability for speed adjustment compared to traditional potentiometers.
2. Specifications
| Feature | Value |
|---|---|
| Working Voltage | DC 5V~30V (Input Anti-Reverse Protection) |
| Rated Current | 5A |
| Maximum Current | 15A |
| Maximum Power | 150W |
| Working Frequency | 1KHz~99KHz Adjustable (1KHz Stepping, Default 20KHz, Accuracy ~1%) |
| Duty Cycle | 0-100% (1% Step) |
| Product Size | 79 x 43 x 26mm / 3.11 x 1.69 x 1.02in |
| Settable Parameters | All parameters are powered down. |
3. Package List
- 1 x DEWIN PWM Motor Driver Module (ZK-MG)
4. Product Overview
Figure 1: Front view of the DEWIN PWM Motor Driver module.
Figure 2: Labeled components on the front panel.
- Digital Tube: Displays motor adjustment duty cycle, duty cycle upper and lower limits, and frequency.
- Rotary Encoder: Counter-clockwise rotation reduces duty cycle, clockwise rotation increases duty cycle. Short press to control motor start/stop, long press to enter setting mode.
- Motor Start and Stop Indicator: Green light indicates motor is running, off indicates motor is stopped.
Figure 3: Rear view with terminal connections.
- V+: Power input positive
- V-: Power input negative
- OUT+: Motor output positive
- OUT-: Motor output negative
Figure 4: Product dimensions.
5. Setup and Wiring
Before connecting, ensure the power supply is disconnected. Connect the module according to the wiring diagram and polarity markings.
- Connect your DC power supply (5V-30V) to the V+ (positive) and V- (negative) terminals. Ensure correct polarity to prevent damage.
- Connect your DC motor to the OUT+ (positive) and OUT- (negative) terminals.
- The module includes input anti-reverse protection, but always double-check connections.
- An external switch or 3.3V level signal can be connected to the STOP port to control the motor's start/stop state. When the key is closed or the 3.3V level is lowered, the motor's start/stop state will toggle.
6. Operating Instructions
6.1. Digital Encoder Knob Operation (Default Interface)
In the default display interface (which typically shows the duty cycle):
- Short Press: Toggles motor start and stop.
- Long Press: Enters the settings interface.
- Counter-clockwise Rotation: Decreases the duty cycle.
- Clockwise Rotation: Increases the duty cycle.
6.2. Settings Interface Operation
When in the settings interface (accessed by long-pressing the knob from the default interface):
- Short Press: Selects the parameter to set and switches between:
- Duty cycle lower limit (displayed as "L" + two digits).
- Duty cycle upper limit (displayed as "H" + two digits or "100").
- Working frequency (displayed as "F" + two digits).
- Long Press: Exits the setting interface and saves all settable parameters.
- Counter-clockwise Rotation: Reduces the value of the currently selected setting.
- Clockwise Rotation: Increases the value of the currently selected setting.
7. Maintenance
- Keep the module clean and free from dust and moisture.
- Ensure proper ventilation to prevent overheating, especially during prolonged use at high loads.
- Regularly check all wiring connections for tightness and signs of wear or corrosion.
- Do not exceed the maximum rated current or voltage to avoid damaging the module or connected motor.
8. Troubleshooting
- Module not powering on: Check power supply connections and ensure the voltage is within the 5V-30V range. Verify power supply functionality.
- Motor not running: Ensure the motor is correctly connected to OUT+ and OUT-. Check if the motor is in the 'start' state (green indicator light on). Verify motor functionality independently.
- Motor speed not adjusting: Confirm the rotary encoder is functioning. If in setting mode, exit by long-pressing the knob. Check if duty cycle limits are set too restrictively.
- Intermittent operation: Inspect all wiring for loose connections. Ensure the module is not exposed to excessive vibration or electromagnetic interference.
- Overheating: Reduce the load on the motor or improve ventilation around the module. Ensure the motor's current draw does not exceed the module's maximum current rating.
9. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For warranty claims or technical support, please contact your retailer or the manufacturer directly with your purchase details.
Please retain your proof of purchase for warranty purposes.