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Suppression of Current Fluctuations and the Brake Torque for PMSM Shutoff in Electric Vehicles

机译：电动汽车中PMSM关闭的电流波动和制动扭矩的抑制

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摘要

When a safety-related fault in the motor controller is detected, the torque output of the motor cannot be effectively shut off in time and an overcurrent occurs at the moment of switching. The advantages and disadvantages of the open circuit and active short-circuit methods are analyzed. Combining the advantages of these two operations, this paper proposes a new mixed voltage modulation method. It introduces a voltage modulation ratio that represents the duty cycle of the open circuit operation during a PWM period. This ratio is first set to a fixed value and gradually reduced to zero. The inverter is switched at a mixed operation and finally remains in the active short-circuit mode. The current can be quickly converged by a freewheeling diode of open circuit. After switching to active circuit, the brake torque is safety. The effectiveness of this shutoff method was verified by simulations and experiments. It shows that current fluctuations are suppressed and the torque output is also within a safety range. In addition, this shutoff method does not require any additional sensor information and is simple to implement.
机译：当检测到电机控制器中的安全相关故障时，电机的扭矩输出不能及时关闭，并且在切换时发生过电流。分析了开路和有源短路方法的优点和缺点。结合这两种操作的优点，本文提出了一种新的混合电压调制方法。它引入了电压调制比，其表示PWM周期期间的开路操作的占空比。该比率首先设置为固定值并逐渐减小到零。逆变器在混合操作处切换，最后保持在有源短路模式。电流可以通过开路的续流二极管快速收敛。切换到有源电路后，制动扭矩是安全性。通过模拟和实验验证了这种关闭方法的有效性。它表明电流波动被抑制，并且扭矩输出也在安全范围内。此外，该关闭方法不需要任何额外的传感器信息，并且易于实现。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第19期|5026316.1-5026316.13|共13页
  • 作者

    Lu Ke; Zhu Yuan; Wu Zhihong; Xiao Mingkang;

  • 作者单位

    Tongji Univ Sino German Sch Postgrad Studies Shanghai 200092 Peoples R China|Tongji Univ Sch Automot Studies Shanghai 200092 Peoples R China;

    Tongji Univ Sino German Sch Postgrad Studies Shanghai 200092 Peoples R China|Tongji Univ Sch Automot Studies Shanghai 200092 Peoples R China;

    Tongji Univ Sino German Sch Postgrad Studies Shanghai 200092 Peoples R China|Tongji Univ Sch Automot Studies Shanghai 200092 Peoples R China;

    Tongji Univ Sch Automot Studies Shanghai 200092 Peoples R China;

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