【作者】 李良光；

【导师】 王聪；

【作者基本信息】 中国矿业大学（北京） ， 控制理论与控制工程， 2011， 博士

【摘要】 异步电动机双馈调速方案具有许多优点,近几年来在风机、水泵和风力发电等方面获得了推广应用。这些应用领域具有的共同特点是都为流量型负载,且系统非频繁起停,因此,调速系统一般采用转子串电阻辅助起动或直接起动。本文分析了感应电动机双馈调速系统的基本原理和技术现状,针对煤矿交流提升机的负载特性和运行特点,提出了提升机双馈调速方案的系统结构和起动方式：采用交—直—交双边PWM变流器双馈调速、单双馈混合起动运行模式。这一系统方案可有效降低调速系统中变流器的额定功率容量,降低调速系统造价,还可以实现用低压变流器拖动中高压电机、在不更换现有电动机的前提下,增加煤矿提升机的额定功率容量,对于现有矿井的扩产具有重要意义。通过matlab计算机仿真和实验测试,证实了所提出方案的可行性。更多还原

【Abstract】 Scheme of a doubly-fed induction motor adjustable speed has many advantages and applied to the fans, pumps and wind power generation recently years. The features of all these applications are the flow load and non-frequently starting and stopping in the system. Therefore, the doubly-fed machine speed control system generally uses the rotor rheostat-type auxiliary starting or direct starting.This paper analyzes the principle and technological present status of the doubly-fed induction motor speed control system. In view of the mine hoist’s load and operation characteristics, the system structure and start-up mode of hoist’s doubly-fed speed regulation scheme are put forward. The system uses the scheme of doubly-fed speed adjustment in AC-DC-AC double PWM converter, and the hybrid startup operating mode both single and double feed. This scheme can reduce the power rating capacity of the converter and the cost of speed control system obviously. It also can drive the high voltage motor with the low voltage converter, and on the premise of without replace existing motor, the system can increase power rating of the mine hoist and has important meanings in the existing mine expansion. The scheme’s feasibility has been proved by the matlab simulation and experiments.更多还原