2 Energy Saving Matrix Converter Technology World’s First World’s First High efficiency with a simple design using an innovative technology. The Varispeed AC controls 9 bi-directional switches with Yaskawa’s own sine-wave PWM control. It directly converts the 3 -phase AC power to the AC power required for precise control of the voltage and frequency output to the motor. Differing from general-purpose inverters, the Varispeed AC has no sine-wave converter to prevent harmonics and no DC link circuit with diodes and electrolytic capacitors. As a result, the design has been greatly simplified. Bidirectional Switch Bidirectional IGBT Power regeneration for even greater energy efficiency.
The Varispeed AC returns the motor’s regenerative energy to the power supply without having to connect any special device. Energy is used with extreme efficiency.
AC AC Motoring Power Supply Motor Power Loss Comparison with Conventional Methods ( 200 V Class, 22 kW at Rated Load ) Power Loss Comparison with Conventional Methods ( 200 V Class, 22 kW at Rated Load ) Sine-Wave Converter + Conventional General-Purpose Inverter Varispeed AC (Matrix Converter Technology) Harmonic Filter Reactor Harmonic Filter Capacitor 58 % 58 % less power loss less power loss Input AC Reactor Loss 395 W Loss 55 W Loss 2.7 W M Inverter CIMR - G 7 A 2022 Matrix Converter CIMR - ACA 2022 M 5 % 5 % increased efficiency increased efficiency Loss 936 W Loss 929 W Loss 800 W Total Loss: (Efficiency: Approx. 91 %) Total Loss:
Sine-Wave Converter CIMR - D5A 2022 2,189 W 929 W (Efficiency: Approx. 96 %) 6 Varispeed AC SUR Phase- SUS SUT V Output Switch W Output Switc R S T SVR SVS SVT S Phase- U V W Phase- WR SWS SWT Regenerating