首页> 外国专利> Phase current measurements in a three phase inverter using a single common DC-link current sensor

Phase current measurements in a three phase inverter using a single common DC-link current sensor

机译:使用单个公共直流母线电流传感器在三相逆变器中进行相电流测量

摘要

A method for measuring current in each phase of a three-phase inverter driven motor is based on the three-phase inverter being controlled in a PWM mode by three PWM signals including the use of a common DC-link current sensing resistor. The current on the sensing resistor is intermittently sampled. The method includes determining a modulation index for the voltage demand set by a motor controller. Based on specific mutual duty cycle conditions of the three PWM phase driving signals, sampling windows of sufficient duration are created for allowing distinct sampling of two of the phase currents.
机译:一种用于测量三相逆变器驱动的电动机各相电流的方法,该方法基于三相逆变器在PWM模式下受到三个PWM信号的控制,包括使用一个公共的直流母线电流检测电阻器。感应电阻上的电流会间歇采样。该方法包括确定由电动机控制器设置的电压需求的调制指数。根据三个PWM相位驱动信号的特定互占空比条件,创建足够持续时间的采样窗口,以允许对两个相电流进行不同的采样。

著录项

  • 公开/公告号US8134327B2

    专利类型

  • 公开/公告日2012-03-13

    原文格式PDF

  • 申请/专利权人 GIANLUGI FORTE;

    申请/专利号US20090435703

  • 发明设计人 GIANLUGI FORTE;

    申请日2009-05-05

  • 分类号G05B11/28;

  • 国家 US

  • 入库时间 2022-08-21 17:29:06

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