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首页> 外文期刊>IEEE Transactions on Industry Applications >A unity-power-factor buck-type PWM rectifier for medium/high-power DC motor drive applications
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A unity-power-factor buck-type PWM rectifier for medium/high-power DC motor drive applications

机译:适用于中/大功率直流电机驱动应用的单位功率因数降压型PWM整流器

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This paper describes the application of a single-stage unity-power-factor buck-type pulsewidth modulation (PWM) rectifier to medium- and high-power variable-speed dc motor drives. The advantages of the developed system are low harmonic distortion in AC supply currents (complying with IEEE Std. 519 and IEC 555), nearly unity power factor over a wide operating shaft speed range, and nearly level armature current and voltage waveforms. These properties of output voltage and current quantities of the converter eliminate entirely any failure risk in current commutation even for oldest motor designs, and further motor problems such as accelerated aging in motor insulation, and mechanical failure due to circulating bearing currents. The design criteria and operating features and characteristics of the buck-type PWM rectifier employed in a unity-power-factor DC motor drive are discussed in the paper. The performance of the resulting system has been tested on 25-65-kW 100-150-A 10-20-kHz DC motor drives, used in various processes of an iron and steel plant.
机译:本文介绍了单级单位功率因数降压型脉宽调制(PWM)整流器在中功率和高功率变速直流电动机驱动器中的应用。开发的系统的优点是交流电源电流中的谐波失真低(符合IEEE Std。519和IEC 555),在宽的工作轴转速范围内功率因数几乎统一,电枢电流和电压波形几乎处于水平。转换器的输出电压和电流量的这些特性完全消除了电流换向中的任何故障风险,即使对于最旧的电动机设计,也消除了进一步的电动机问题,例如电动机绝缘的加速老化以及循环轴承电流引起的机械故障。本文讨论了单位功率因数直流电动机驱动器中采用的降压型PWM整流器的设计标准,工作特性和特性。最终系统的性能已在钢铁厂的各种过程中使用的25-65 kW 100-150-A 10-20 kHz直流电动机驱动器上进行了测试。

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