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Analysis of braking resistor consumption principle
Apr 09, 2018

Analysis of braking resistor consumption principle


The way that brake resistors consume electrical energy is to convert electrical energy into thermal energy and dissipate it into the air. The amount of power consumed by the braking resistor can be determined based on the power of the motor. Unlike ordinary resistors, other resistors are only a current-limiting element, and braking resistors are consumable components. The purpose of applying a braking resistor in a circuit is also its consumption of feedback voltage.


The braking resistor is a consumable component, not just a trivial component in the circuit. Before the motor stops running, there will be a drop in the operating frequency. During this process, the kinetic energy generated by the drive system will be fed back to the DC circuit in the form of electrical energy. As a result, the voltage will rise and the voltage will increase. The circuit has an adverse effect. The braking resistor is used to consume this part of the voltage to ensure the safety of the entire circuit.


The braking resistor is used by Malone inverters to convert the regenerative energy in the process of rapid braking of the motor directly into heat energy so that the regenerated energy will not be fed back into the power network and will not cause voltage fluctuations of the grid, thus ensuring the power network. The smooth running effect.


The frequency changer uses the braking resistor that is standard with the braking resistor used in ATV71 series inverters. It is out of this range and is used for lifting and climbing loads. Such as elevators, lifting hooks, and mine hoists. The braking resistor used in the inverter is a ripple resistance. It is mainly used in the mechanical system where the inverter controls the motor to stop quickly, and helps the motor to convert the regenerative electric energy generated by the rapid stop into heat energy.