What is a Drive?
A Variable Frequency Drive (VFD) is a type of motor controller that rotates an electric motor by varying the frequency and voltage applied to it. Other names for VFD include variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, microdrive, and inverter. Frequency (Hz) is directly related to motor speed (RPM); in other words, increasing frequency causes the motor to rotate faster and changes its RPM.
If you need an electric motor to operate below its nominal full speed, use a VFD to reduce voltage and frequency according to market demands. Thus, a VFD easily increases or decreases speed via frequency and voltage to match our needs.
Drives are generally divided into two main groups: three-phase inverters and single-phase inverters. The key difference lies in the input power type—single-phase inverters receive single-phase input and output three-phase power, while three-phase inverters receive and output three-phase power.
Why Do We Use a VFD?
- Adjust motor speed (RPM) based on load
- Extend the lifespan of rotating components due to lower startup speed
- Reduce energy consumption, especially at low speeds
- Enable braking with reduced losses
- Connect to industrial networks such as PROFIBUS
- Issue commands via PID controller
- Control and command via computer interface
- Reduce noise and vibration
- Minimize thermal and mechanical stress
- Save up to 50% energy and improve efficiency
- Extend the effective life of mechanical components
- Enhance industrial equipment performance
Features of VFD Series V75
- Single-phase input: 200 to 240 volts, output three-phase 380 to 480 volts, power range: 0.45 kW to 7.5 kW
- Three-phase input: 380 to 480 volts, output three-phase 380 to 480 volts, power range: 0.75 kW to 800 kW
- High-performance sensorless vector control (SVC) for precise speed adjustment
- Significant energy-saving performance
- Excellent PID response for fast torque control
- Output frequency: 0.5 to 400 Hz
- Full motor protection against overcurrent, overload, short circuit, and overheating
- Full drive protection against input/output phase faults, high torque, low voltage, high current, temperature rise, and output short circuit
- Speed control range: 1:40 in V/F mode, 1:200 in SVC mode
- Speed control accuracy: ±2% in V/F mode, ±0.2% in SVC mode
- Programmable acceleration and deceleration time: 0 to 3200 seconds
- Overload capacity: 150% for 60 seconds, 200% for 2 seconds
- Ingress protection: IP41 without removing top cover, other parts IP20
- Programmable input/output terminals
- 2 analog inputs and 2 analog outputs
- 8 digital inputs and 2 digital outputs
- RS485 port with RTU Modbus protocol support
- Operating temperature: −10°C to +50°C
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