The reason for installing the discharge resistor for the inverter to minimize the risks

Risks are often seen when engine brakes are too fast such as failure of the inverter, causing heat, even causing an engine fires. In order to solve these problems, users often install discharge resistors after the inverter. So what are the benefits of installing discharge resistors?

What is the discharge resistor?

The discharge resistor is measured in Ohm value, which is found in many electronic circuits. The main purpose of the discharge resistor is to dissipate excess electrical energy. The energy of the engine generated during engine braking or inertia. These energies, if left behind, will cause great losses such as fire and explosion of equipment.

Why must a discharge resistor be installed?

During a stop motor, the engine becomes a generator that generates alternating power.

IGBT protection circuitry by diode becomes an alternating voltage transformer rectifier circuit. Because the motor is made into a DC voltage, it goes back to the DC bus, causing the DC voltage to rise. A sudden increase in the DC bus will cause component damage. Thus installing discharge resistors to dissipate excess energy. Energy during the engine stops reverses rotation in the form of heat.

How to choose the discharge resistor?

The choice of discharge resistors depends on many factors such as The capacity of the engine, the load of the engine, the inverter … Therefore, when selecting the discharge resistance, it is necessary to consider the above factors and follow led by the inverter manufacturer.