FRENIC4600 Series Medium-voltage direct output inverters Stable control

  • The addition of V/f control with simple sensor-less vector control enables stable motor operation during load variations. No speed sensor is required.

  • The 32-bit MPU ensures a fast response with high precision.

  • For facilities that require speed and torque accuracy, vector control with a speed sensor is also available. (Option)

  • With the need for an output transformer eliminated, the overall efficiency of the inverter is improved.

  • Fuji Electric's own unique multi-level PWM control reduces switching losses.

  • By reducing the number of components used in the main circuit, we have reduced losses in the converter's main circuit.

  • The output current is substantially sinusoidal, and this reduces the harmonic losses of the motor.

  • The multi-phase diode full-wave rectification allows a high-power-factor operation (approx. 95% or more) on the power supply.
    In addition, reduced harmonic current on the power supply side enables harmonic loss to be reduced at the input transformer primary winding.