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应用电液变阻器改善同步电动机的起动性能
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作者 杨国鸿 《高桥石化》 2002年第6期12-14,48,共4页
分析炼油厂酮苯装置离心冷冻站3200kW冷冻机组高速齿轮箱齿轮损坏的事件,从解决电动机启动对压缩机高速齿轮箱齿轮的冲击着手,采用GZYQ型高压电机电液变阻软起动装置,成功地实现了3200kW同步电动机的软启动,解决了以前冷冻机组高速... 分析炼油厂酮苯装置离心冷冻站3200kW冷冻机组高速齿轮箱齿轮损坏的事件,从解决电动机启动对压缩机高速齿轮箱齿轮的冲击着手,采用GZYQ型高压电机电液变阻软起动装置,成功地实现了3200kW同步电动机的软启动,解决了以前冷冻机组高速齿轮箱齿轮经常损坏的难题,简要介绍了GZYQ型高压电机电液变阻软起动装置系统构成,工作原理及其性能特点,并总结了电液变阻器在炼厂酮苯装置离心式冷冻机组上的应用情况。 展开更多
关键词 应用 电液变阻器 同步电动机 起动性能 高压同步电动机
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电液变阻起动柜在高压电动机上的应用
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作者 郭胜斌 《新疆有色金属》 2014年第5期83-83,85,共2页
介绍了采用串联电液起动电阻降压起动水泵的方法和电液电阻阻值的配置,并采用一台起动柜分别起动两台水泵,有效解决水泵起动困难和跳闸的问题。
关键词 起动电流 电液变阻器 电液电阻阻值
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球磨机的异步电动机启动方法
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作者 高志明 王炳龙 高圣溥 《价值工程》 2015年第23期109-111,共3页
介绍了球磨机的基本运行工况,分析了绕线式异步电机的机械特性,通过发挥电液变阻器的功能,改善电动机大电流启动对设备造成的冲击,并利用变阻器阻值的稳定变化特性,提高电动机的转矩性能,满足球磨机启动的平滑稳定。
关键词 绕线式异步电动机 球磨机 电液变阻器 启动转矩
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Novel magneto-rheological fluid damper for passive force/torque feedback 被引量:9
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作者 戴金桥 宋爱国 王爱民 《Journal of Southeast University(English Edition)》 EI CAS 2007年第1期70-74,共5页
The damper is capable of providing a continuously variable dampering force/torque in response to a magnetic field. It consists of an upside cap and an underside cap with a rotor located between them, the magneto-rheol... The damper is capable of providing a continuously variable dampering force/torque in response to a magnetic field. It consists of an upside cap and an underside cap with a rotor located between them, the magneto-rheological (MR) fluid is filled into the gaps between the rotor and the caps. When the viscosity of the MR fluid increases under the influence of the magnetic field, the movement of the rotor will be resisted. The output torque is made up of the torque caused by the magnetic field, the torque caused by the plastic viscosity of the MR fluid, and the torque caused by the coulomb friction. The viscous torque can be calculated by a simple method and the frictional torque can be obtained by experiments. The torque dependent on the magnetic field is obtained by electromagnetic finite dement analysis. Experiments are done on the damper prototype and the validity of the design is verified. 展开更多
关键词 force/torque feedback magneto-rheological fluid DAMPER electromagnetic finite element analysis
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Investigation of Interline Dynamic Voltage Restorer with Virtual Impedance Injection
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作者 Ahmed Elserougi Ahmed Hossam-Eldin +1 位作者 Ahmed Massoud Shehab Ahmed 《Journal of Energy and Power Engineering》 2012年第1期101-109,共9页
The inter-line dynamic voltage restorer (IDVR) consists of several voltage source inverters connected to different independent distribution feeders with common dc bus. When one of the inverters compensates for volta... The inter-line dynamic voltage restorer (IDVR) consists of several voltage source inverters connected to different independent distribution feeders with common dc bus. When one of the inverters compensates for voltage sag that appears in its feeder (voltage control mode), the other inverters pump the required power into the dc bus (power control mode). Each inverter will have both voltage and power controllers; only one controller is in use during the abnormal conditions according to its feeder state. The voltage controller uses one of the dynamic voltage restoration techniques. In this paper, the in-phase technique is applied and two types of loads are considered (constant impedance and three phase induction motor). Since the voltage restoration process may need real power injection into the distribution system, the power controller injects this power via voltage injection. This voltage injection is simulated by voltage drop across series virtual impedance. A new scheme is proposed to select the impedance value. The impedance value is selected such that the power consumed by this impedance represents the required power to be transferred without perturbing the load voltage. The performance of this system is also studied during voltage swell. A scheme for operation of multi-feeder IDVR system is proposed in this paper. Simulation results substantiate the proposed concept. 展开更多
关键词 Dynamic voltage restorers IDVR voltage sag voltage swell power quality.
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