Frequency converter braking process - Solutions - Huaqiang

High frequency probe and high frequency line can be customized according to specific requirements.

Photocoupler for reliable signal isolation and protection.

1. When the motor is decelerating or reversing due to external forces (such as being dragged), it enters a power generation mode, feeding energy back into the DC bus and increasing the bus voltage. 2. Once the DC voltage reaches the threshold for the brake unit to activate, the power transistor in the brake unit turns on, allowing current to flow through the braking resistor. 3. The braking resistor converts this electrical energy into heat, which is then dissipated, causing the motor speed to decrease and the bus voltage to drop. 4. When the bus voltage falls below the cutoff threshold of the brake unit, the power transistor turns off, stopping current from flowing through the resistor. 5. The system continuously monitors the bus voltage and repeats the ON/OFF cycle of the brake unit, maintaining a stable voltage level and ensuring the system operates efficiently and safely. This braking mechanism is essential for managing energy recovery in motor control systems, preventing overvoltage damage, and improving overall system performance.