Inverter Speed Controllers
Commander SK Digital AC
Variable Speed Drives
Control Features:
- Open loop vector control
- Speed or torque control
- Speed ref. input: 0‑10 V, 0‑20 mA, 4‑20 mA, (‑10 to +10 V SM‑I/O Lite option)
- 4 digital inputs
- Switching frequency: 3 (default) – 6 – 12 – 18 kHz
- Output frequency 0 to 1500 Hz
- Accel & Decel ramps (linear & S type)
- Serial communication ‑ Modbus RTU RS485 via R J45 connector
- DC injection braking standard
- Dynamic braking transistor standard
- Dynamic motor flux V/Hz saves energy
- Quadratic motor flux V/Hz for fan and pump optimization
Protection Features:
- Undervoltage, supply & DC link overvoltage, phase loss, drive overload, instantaneous overcurrent, short circuit, ground fault, drive thermal, watchdog, motor thermal
General Characteristics:
- Maximum overload 150% of rated current for 60s
- Intelligent Thermal Management (ITM) optimizes switching frequency
- 8 preset speeds
- Flying start
- Mains dip ride through
- Automatic no‑spin autotune for fast performance optimization
- CTSoft and cable available for more demanding set‑ups