Estimator of the Rotor Temperature of Induction Machine Based on Terminal Voltages and Currents
Estimator of the Rotor Temperature of Induction Machine Based on Terminal Voltages and Currents
复制标题
基于端电压和电流的感应电机转子温度估算器
DOI：
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复制
发表时间：
2017
影响因子：
4.9
通讯作者：
S. Vukosavic
中科院分区：
文献类型：
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作者：
N. Popov;S. Vukosavic
转子温度的监测对于感应电机的控制和保护都是非常重要的。温度传感器通常由于额外的布线而被避免。虽然基于测试信号的方法可以实现最佳精度，但由于高转矩涟漪，它们很少使用。在将固有脉宽调制（PWM）电压分量用作测试信号的情况下，涟漪可以忽略不计。在本文中，设计了一种新的温度估计方法，对PWM延迟，信号采集延迟，高频电压和电流分量的相位误差鲁棒性。与先前的基于阻抗的真实的部分计算温度的解决方案相反，所提出的方法基于PWM频率下的阻抗的绝对值。温度由输入阻抗的变化计算得出。提出的温度估计方法进行了测试的实验装置，它使用一个逆变器与正弦调制输出电压和感应伺服电机。
Monitoring of the rotor temperature is very important for both control and protection of induction machines. Temperature sensors are usually avoided due to additional wiring. Although the best precision is achieved by test-signal-based methods, they are rarely used due to a high-torque ripple. The ripple is negligible in cases where inherent pulse width modulation (PWM) voltage component is used as the test signal. In this paper, a novel temperature estimation method is devised, robust against the PWM delays, signal acquisition delays, and phase errors in high-frequency voltage and current components. Opposed to previous solutions where temperature is calculated based on the real part of the impedance, the presented method is based on the absolute value of the impedance at the PWM frequencies. The temperature is calculated from the change of the input impedance. Proposed method for temperature estimation was tested on an experimental setup which uses an inverter with sine modulated output voltages and an induction servo motor.