1. Product Overview
The LSW979-30-7F is a brushless motor controller designed for electric bicycles. It manages power delivery to the motor, ensuring efficient and controlled operation. This controller is often part of a customized e-bike kit, compatible with various components including intelligent LCD displays like the KD21C.
2. Specifications
The following table details the technical specifications for the LSW979-30-7F brushless motor controller:
| Feature | Specification |
|---|---|
| Model | LSW979-30-7F |
| Rated Voltage | 36V |
| Maximum Current | 15A |
| Rated Current | 7A |
| Low Voltage Protection | 31.5V |
| Throttle Adjustment Voltage | 1.2V - 4.4V |
| Operating Temperature | -20℃ to 60℃ |
| Storage Temperature | -30℃ to 70℃ |
Note: Specifications for the E-bike Intelligent LCD Display (Model: KD21C) are provided separately as it is a complementary component.
| Feature (KD21C Display) | Specification |
|---|---|
| Power Supply | 24V/36V/48V |
| Rated Working Current | 10mA |
| Maximum Working Current | 30mA |
| Off-state Leakage Current | <1μA |
3. Setup and Installation
This controller is a customized product. It is crucial to ensure compatibility with your specific e-bike components. If you have not already, please contact the seller with your e-bike's information to ensure proper matching.
3.1 Wiring Diagram Overview
Proper wiring is essential for the safe and correct operation of your e-bike. Refer to the following diagrams for general guidance. Specific connections may vary based on your e-bike's model and other components.
3.2 Identifying Connectors
The controller features various color-coded wires and connectors for different functions. Carefully match these to your e-bike's corresponding components.
- Motor Phase Wires: Typically thicker wires (e.g., yellow, green, blue) connecting to the motor.
- Hall Sensor Wires: Smaller wires (e.g., red, black, yellow, green, blue) for motor position sensing.
- Battery Power: Main power input wires (e.g., thick red for positive, thick black for negative).
- Throttle: Connects to the throttle unit (often three wires: power, signal, ground).
- Brake Levers: Connects to brake levers for motor cut-off functionality.
- Display/Control Panel: Connects to the e-bike's display unit (e.g., KD21C).
- Pedal Assist Sensor (PAS): Connects to the pedal assist sensor.
Watch the video below for a visual guide on identifying the controller's connectors:
Important: Always ensure power is disconnected from the battery before making or changing any electrical connections. Incorrect wiring can damage the controller, motor, or battery.
4. Operating Instructions
Once the controller is correctly installed and all components are connected, follow these general operating steps:
- Power On: Turn on the e-bike's battery and then the display unit (if applicable). The display should illuminate and show relevant information.
- Throttle Control: Gently twist the throttle to engage the motor. The motor speed will correspond to the throttle position.
- Pedal Assist: If a PAS is installed, pedaling will activate motor assistance, providing power based on your pedaling effort and the selected assist level on your display.
- Brake Cut-off: Engaging the brake levers should immediately cut power to the motor, ensuring safety.
- Power Off: Always turn off the display unit first, then the battery, when you are finished riding.
Refer to your e-bike's display unit manual (e.g., KD21C) for specific instructions on changing assist levels, viewing speed, distance, and battery status.
5. Maintenance
To ensure the longevity and optimal performance of your LSW979-30-7F controller, follow these maintenance guidelines:
- Keep Dry: Protect the controller from water and excessive moisture. While designed for outdoor use, direct exposure to heavy rain or submersion should be avoided.
- Cleanliness: Periodically clean the exterior of the controller with a dry or slightly damp cloth. Avoid using harsh chemicals or abrasive materials.
- Connection Checks: Regularly inspect all wire connections for tightness and signs of corrosion or damage. Loose connections can lead to intermittent power or component failure.
- Temperature Management: Ensure the controller has adequate airflow and is not covered, especially during prolonged use, to prevent overheating.
- Avoid Physical Damage: Protect the controller from impacts or drops that could damage its internal components.
6. Troubleshooting
If you encounter issues with your e-bike system, consider the following troubleshooting steps:
- No Power to Motor/Display:
- Check battery charge level.
- Verify all power connections from the battery to the controller are secure.
- Ensure the e-bike's main power switch and display unit are turned on.
- Motor Not Responding to Throttle/PAS:
- Check throttle and PAS sensor connections to the controller.
- Ensure brake levers are not engaged, as they typically cut motor power.
- Inspect motor phase wires and Hall sensor wires for secure connections.
- Intermittent Power:
- Check all connectors for looseness or corrosion.
- Ensure battery is securely seated and making good contact.
- Error Codes on Display:
- Refer to your e-bike's display unit manual (e.g., KD21C) for specific error code interpretations and solutions.
If troubleshooting steps do not resolve the issue, or if you suspect a defective product, please contact the seller for assistance. Do not attempt to open or repair the controller yourself, as this may void any warranty.
7. User Tips
Based on common user experiences and questions, here are some tips for using your e-bike controller:
- Customization Confirmation: Since this is a customized product, always confirm your e-bike's specific requirements with the seller before purchase to ensure perfect compatibility.
- Wiring Verification: Double-check all wiring connections against the provided diagrams and your e-bike's specific setup. A common issue is incorrect or loose connections.
- Monitor Display: Pay attention to any error messages or unusual readings on your e-bike's display (e.g., KD21C) as they can indicate underlying issues.
- Gentle Handling: While robust, avoid unnecessary stress on the wires and connectors during installation and use.
8. Warranty and Support
For any questions, problems, or warranty claims, please contact the seller directly. They are committed to assisting you and resolving any issues you may encounter.
- Defective Products: If the product is defective upon arrival, do not sign the shipping bill. Take photos and contact the seller immediately for a refund or replacement.
- Returns: If you need to return the goods due to product defects or damage (not personal preference or misuse), contact the seller within 15 days of receipt. Returned items must be in their original condition.
- Contact Information: When contacting support, always provide your order number and, if applicable, images or videos of the defective products to facilitate a quicker resolution.
Note: Modifying or canceling an order after it has been shipped may not be possible. Please confirm all details before shipment.
