Suppliers of frequency converter accessories remind you that the main function of the brake unit is to connect the brake resistor, to ensure the safe operation of the frequency converter by consuming the current returned due to emergency braking operation.
The brake unit is essentially a chopper, which determines the input and output of the braking state based on the voltage value on the DC bus line. At the same time, the brake unit can effectively monitor the current passing over the kinetic resistor, ensuring its normal operation and safe operation. In addition, the brake unit also helps to consume electricity. When the asynchronous motor is in the state of generating braking, the mechanical energy of the system is converted into electricity and accumulates in the DC part of the inverter, resulting in an increase in the DC voltage.
In addition, the application of the brake unit is also included in the renewable energy feedback system of shared DC bus mode, in this way, the renewable energy generated by the brake can be fully utilized, both saving electricity and processing renewable electricity. In practical applications, multi-drive systems are expensive, less branded, and often used in high-end markets such as steel and paper making.
In summary, the brake unit plays a crucial role in the frequency converter system, not only ensuring the safe operation of the equipment, but also improving energy efficiency.