Transistor pulse converter with voltage link for the generation of a three-phase, frequency and amplitude-variable output voltage from an AC mains. This unit in conjunction with the corresponding control unit is used to assemble a frequency converter or servo amplifier.
Technical description: - Single-phase mains connection
- Variable link voltage due to fully controlled B2C rectifier bridge circuitry
- Three-phase inverter built with IGBT (insulated gate bipolar transistor)
- Maximum switching frequency 20 kHz, resulting in good approximation of sinusoidal current as well as low noise build-up in the machine
- Output short-circuit-proof, earth-fault-proof and switch-proof
- Interface for connection of the control unit (25-pin sub-D socket, TTL level)
- Each individual transistor can be switched on and off via the interface and is protected from damage with an interlocking device
- The respective activated IGBT's are displayed via LEDs
- Monitoring of the variable link voltage, temperature rise in machines and converter, excess currents in the rectifier and converter. Output of the switching status via interface and display via LEDs
- Integrated brake chopper
- Safe galvanic isolation (SELV) between the power component and the control unit
- Output currents are detected via Hall generators. Electrically separated output via interface
- Two-stage mains filter for the reduction of the line-bound interference
- Three-phase motor filter for the reduction of the edge steepness of the pulse voltages at the converter output to values < 250 V/µs
