Direct drive for medium voltage induction motor, Realizing high efficiency and high input power factor
TMdrive-MV is a medium voltage IGBT inverter with the concept of “clean wave”.
This inverter has been developed on the basis of the latest “state-of-the-art” AC drive technology for large industrial plants and the world-renowed advanced technology in power electronics.
Applying TMdrive-MV instead of a damper or a control valve can achieve a significant energy saving by driving a medium voltage induction motor at variable speed for square torque loads such as fan, pump and blower.
Characteristics of TMdrive-MV make them an ideal variable speed drive for medium voltage motor including existing motor.
1. Power Source and Motor friendly
Harmonic currents are reduced by 18 pulse rectification using a special designed transformer
The harmonic contents meet IEEE519 requirements
Output current close to sine wave by multi-level PWM technology
No derating of motor output capacity required
Standard motor is applicable since the switching surge voltage is small owing to unique PWM switching control
2. High Efficiency
Less harmonic contents reduce the harmonic loss of the motor
Higher efficiency by eliminating output transformer
Higher efficiency by reducing the number of 1GBTs.
3. High Power Factor
High power factor by using diode bridge rectifiers (Approx. 95% or more at input transformer primary)
4. Saving energy
TMdrive-MV realizes energy saving by variable speed control for square torque loads such as fan, blower and pump as well as by its high efficiency
5. High Reliability
By using IGBT with rated voltage of 1700V, the number of parts are reduced and the reliability of main circuit is increased
Use of 32 bit micro processor (model PP7) specifically designed for power electronics applications reduces the number of parts and increases the reliability of the control
