Lenze 520 Series - 1 Features

38 4Q - DC Chopper 520 series
The 520 series comprises two four-quadrant DC choppers for the power range up to
2.25 kW. They generate a variable output voltage due to pulse width modulation.
The Lenze 520 series can be used together with separately or permanently excited
DC machines (motors/generators) for speed and torque control.
1. FEATURES
- Low armature current form factor due to 18 kHz chopper frequency
- High control resonse due to self-commutated transistor bridge
- Low-noise operation of the motors
- Standard motors can be operated without armature choke
- 160% overcurrent capacity for 20 seconds
- Operation as stand-alone unit and in DC bus connection
- Speed control using DC tacho
- Armature current and torque control
- Protected against earth fault and short-circuit
- l~t surveillance during overcurrent operation
- Trip function with external indication via LED and signal output
- Protection of the device due to integrated temperature surveillance
- lntegrated semi-conductor fuses
- Mains isolation between control and power stage
- lntegrated brake chopper
- Display of operating states by LEDs
- Diagnosis plug for adjustment and service
Lenze