BUM 60S-04/08-54-B-001-VC-AE-00 | BAUMULLER Servo Driver

The total unit BUM 60 S consists of the supply converter, the motor-sided inverter and of the controller module. The different controller modules are not described here, but in separate manuals.Supply converterThe supply converter at the BUM 60 S is an uncontrolled B6 rectifier with a inrush-current limiting and a chopper circuit.Inrush-current limitingDue to the DC link capacity a direct switch-on of the device to the mains without using a limiting switch would cause inadmissibly high current surges. In order to avoid these current surges the inrush-current is limited by a resistor.Chopper circuitIn certain operating states the connected motor feeds back energy to the converter. This energy is saved in the DC-link and leads to an increase of the DC-link voltage. In order to avoid an overvoltage shutdown threshold, the fed back energy is converted into heat from a certain DC-link voltage in the internal or external chopper resistor.Motor-sided inverterThe motor-sided inverter consists of the IGBT-power unit and the associated sensors. On the one side the sensors provide measuring signals for the control and on the other hand allows the self-protection of power electronics. The control of the inverter is executed by the accordingly used controller.