VFD series V74 features a compact single-phase design.

What is a Drive?
A Variable Frequency Drive (VFD) is a type of motor controller that regulates motor speed by adjusting the frequency and voltage supplied to the electric motor. Other names for VFD include variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, microdrive, and inverter. Frequency (Hz) directly correlates with motor speed (RPM); increasing frequency results in higher RPM.

If an electric motor needs to operate below its nominal full speed, a VFD allows you to reduce voltage and frequency according to load requirements. In essence, a VFD adjusts speed up or down easily to match operational needs.

VFDs are generally categorized into:

• Single-phase inverters: Accept single-phase input and output three-phase power.
• Three-phase inverters: Accept and output three-phase power.

Why Use a VFD?

• Adjust motor speed (RPM) based on load
• Extend the lifespan of rotating components due to soft start
• Reduce energy consumption, especially at lower speeds
• Enable braking with minimal losses
• Integrate with industrial networks like PROFIBUS
• Issue commands via PID controllers
• Control and command via computer interface
• Minimize noise and vibration
• Reduce thermal and mechanical stress
• Save up to 50% energy and improve efficiency
• Extend mechanical component life
• Enhance industrial equipment performance

Features of VFD Series V74

• Single-phase input: 220–240V
• Motor capacity: 0.4KW to 2.2KW
• Compact body design for panel space efficiency
• Output frequency: 1–400Hz
• Adjustable carrier frequency: 5kHz to 12kHz
• Speed control range:
  • 1:40 in V/F mode
  • 1:200 in SVC (open-loop vector control)
• Overload capacity: up to 150%
• Starting torque: up to 150%
  • V/F mode at 3Hz
  • SVC mode at 0.5Hz
• Protection rating: IP20
• Speed control accuracy:
  • ±2% in V/F mode
  • ±0.2% in SVC mode
• Detachable control panel
• 2 analog inputs, 1 analog output
• 6 digital inputs, 1 digital output
• RS485 port with Modbus protocol support
• LED display and remote control support
• Quick and easy startup
• Operating temperature: −10°C to +50°C

Energy Efficiency Insight
Reducing fan or pump speed by just 10% can cut costs by up to 25%. In many systems, a 50% speed reduction can lead to a 75% drop in energy consumption.