Does the frequency converter control the lifting equipment need to add the braking resistor?
The utility model has the advantages that the power supply can be reversely supplied to the power supply circuit, and the utility model can be used more frequently in the frequency conversion system of common DC buses and can save energy.
In order to release this part of energy, the method of increasing the resistance power (appropriately reducing the resistance value) is adopted.
When the motor is decelerated, the inertia of the excessive equipment will change the motor into a generator, which is out of the power generation state, and the motor will supply power to the inverter directly, which will cause the converter to alarm over voltage.
Lifting equipment is characterized by the uplink process, the process of down, the motor is in the state of power generation. If the braking resistor is not used, the electric power generated by the motor is applied directly to the module of the frequency converter, resulting in frequent damage to the module.
The brake resistor is must increase the power brake unit depends on the inverter, inverter power with only small braking resistance can, inverter power, must be combined braking unit + braking resistor; otherwise, will lead to the frequent damage of the inverter module;
