By drawing on our engineering bases of our long-standing rich experiences of powertronics technologies through our variable speed control system series, we adopted high voltage IGBTs and various digital control technologies including boost chopper, regenerative inverter, etc. We provide the best combination solution for saving energy at drinking water and sewerage treatment facilities.

• Best for making wound type induction motor into variable speed
• Highly efficient and energy saving
• Smaller footprint
• No need for anti-harmonics function or power factor improvement unit

CV700SB is connected to the secondary circuit of the winding wire type motor while the direct medium voltage inverter THYFREC VT710 is connected to the primary circuit of the motor. Energy of the motor is supplied by the primary circuit and the rotation speed of the motor is changed by controlling the amount of energy regenerated from the secondary circuit by CV700SB to power supply. CV700SB only controls energy of the secondary circuit of the winding wire type motor, thus the electric power handled is smaller compared to VT710, which controls all energy of the primary circuit. Therefore, VT710 provides higher device efficiency but CV700SB provides higher system efficiency.