Three-Phase Gate Switch Control of BLDC Motor Driver for Power Transfer Efficiency

This paper examines the power transfer efficiency of three-phase gate switches to drive BLDC motors. The three-phase gate switch has six gate switches with eight switch states, which are used to control voltage or current. The effect of voltage arising on connection lines between gate switches can be determined by taking into account the rise time, fall time, and propagation delay parameters. Switching causes a loss of power and lowers efficiency. This is because the switching speed increases and the switching frequency increases, so the power loss also increases but the efficiency actually decreases. In order to overcome the problem of power transfer efficiency, the programmed PWM method is applied to regulate the switching transition by eliminating low-harmonic signals. Thus, the power transfer efficiency can be increased by about 21.16% compared to the power transfer conditions in the benchmark.