| 摘要 |
PURPOSE:To obtain a controller which suppresses a memory capacity by storing the ON-OFF combination state of a switching element of an inverter in a memory, and obtaining the PWM output by using the combined state and the counting operation of a timer. CONSTITUTION:A plurality of switching elements (transistors 2-7) are formed in a bridge state to construct an inverter, and the ON/OFF state of the elements are controlled to convert a DC power source 1 to an AC of 3-phase and the like. The combined state of the ON/OFF state is stored in advance in a memory, the combined state is read out from the memory, an initial value set in a calculator is set to a timer, and the ON/OFF state is maintained during the timer time. When this time is elapsed, the state of the next zone is read out from the memory, and the ON/OFF state of the switching element is controlled similarly. |
