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首页> 外文期刊>Power Electronics, IET >Current limiting soft starter for three phase induction motor drive system using PWM AC chopper
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Current limiting soft starter for three phase induction motor drive system using PWM AC chopper

机译：使用PWM AC斩波器的三相感应电动机驱动系统的限流软起动器

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摘要

This study presents a new current-limiting soft-starter for a three-phase induction motor drive system using pulse width modulation (PWM) AC chopper. A novel configuration of three-phase PWM AC chopper using only four insulated gate bipolar transistors (IGBTs) is also proposed. The proposed control strategy does not require zero crossing detection circuits, which employed in thyristorised soft starters. It requires only one current sensor. The duty ratio of the chopper IGBTs is obtained from the closed-loop current control in order to limit the motor starting current at a preset value. Only two complementary gate pulses are obtained from the control circuit to control the four IGBT switches. The proposed control strategy is characterised by a simple control loop; thus, a low-cost processor can be used due to the low-computation burden. The superiority of the proposed strategy is proved theoretically and confirmed experimentally. The experimental work is developed using a laboratory prototype system composed of DSP-DS1104 digital control board and 1.5 HP induction motor. The proposed starter offers a smooth start-up for the motor speed, torque ripple minimisation, less number of semiconductor switches, less switching and conduction losses, less harmonics and improved input power factor.
机译：这项研究提出了一种使用脉宽调制（PWM）交流斩波器的三相感应电动机驱动系统的新型限流软起动器。还提出了仅使用四个绝缘栅双极型晶体管（IGBT）的三相PWM AC斩波器的新型配置。所提出的控制策略不需要过零检测电路，该电路用于可控硅的软起动器中。它只需要一个电流传感器。斩波器IGBT的占空比从闭环电流控制中获得，以便将电动机启动电流限制在预设值。从控制电路仅获得两个互补门脉冲来控制四个IGBT开关。所提出的控制策略以简单的控制回路为特征。因此，由于运算量低，因此可以使用低成本的处理器。该策略的优越性在理论上得到了证明，并在实验上得到了证实。实验工作是使用由DSP-DS1104数字控制板和1.5 HP感应电动机组成的实验室原型系统开发的。所提出的启动器可为电动机速度提供平稳的启动，最小化转矩波动，减少半导体开关数量，减少开关和传导损耗，减少谐波并改善输入功率因数。

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