Abstract
This paper discusses an instantaneous calculation method of matrix converter using Venturini control algorithm. This algorithm can stabilize output voltages in the low speed operation because a narrow PWM pulse disappears on the condition of low output voltages, and it can drive by few computational complexities. This algorithm calculates matrix elements, which include trigonometric functions using the angles of input voltages, mathematically. Conventional methods estimated the angles using the zero crossing points of input voltages. The proposal method calculates matrix elements directly using the instantaneous values of input voltages. Especially, this method can calculate trigonometric functions include triple angle accurately and easily, even when a power supply has distortion. A permanent magnet synchronous motor as a load is driven desirable by using the proposal method. In addition, the simulation and experimental results show that the proposal method can stabilize output voltages when any phase input voltage has distortion.
