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Power quality improvements in a zeta converter for brushless DC motor drives

机译:用于无刷直流电机驱动器的zeta转换器的电能质量改进

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This study deals with a reduced sensor configuration of a power factor correction (PFC) based zeta converter for brushless DC (BLDC) motor drive for low power applications. The speed of the BLDC motor is controlled by varying the dc-link voltage of the voltage source inverter (VSI) feeding BLDC motor drive. A low-frequency switching of the VSI is used for achieving the electronic commutation of BLDC motor for reduced switching losses. The PFC-based zeta converter is designed to operate in discontinuous inductor current mode; thus utilising a voltage follower approach which requires a single voltage sensor for dc-link voltage control and PFC operation. The proposed drive is designed to operate over a wide range of speed control with improved power quality at ac mains. The performance of the proposed drive is validated with experimental results obtained on a developed prototype of PFC converter.
机译:这项研究涉及基于功率因数校正(PFC)的zeta转换器的传感器配置的减少,该转换器适用于低功率应用的无刷直流(BLDC)电机驱动。通过改变为BLDC电动机驱动器供电的电压源逆变器(VSI)的直流母线电压,可以控制BLDC电动机的速度。 VSI的低频开关用于实现BLDC电机的电子换向,以减少开关损耗。基于PFC的zeta转换器设计为在不连续电感器电流模式下工作。因此采用了电压跟随器方法,该方法需要一个电压传感器来进行直流链路电压控制和PFC操作。建议的驱动器设计用于在广泛的速度控制范围内运行,并改善了交流电源的电能质量。建议的驱动器的性能已通过在开发的PFC转换器原型上获得的实验结果进行了验证。

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