Power-hardware-in-the-loop (PHIL) simulations, in the form of machine emulation, are gaining popularity for electric drive system testing in transportation applications. Since there is a reduced chance of equipment damage with PHIL simulations, they are particularly suited for the testing of electric drive systems, for drive inverter faults. This article investigates PHIL simulations to emulate machine behavior in the event of drive inverter faults resulting due to a gate-drive failure of one or more switches. Modifications are proposed to the closed-loop current control of the machine emulator system. These modifications ensure that various lower order harmonics in the emulated machine currents, resulting due to the drive inverter faults, are accurately emulated. Drive inverter damages resulting due to machine behavior emulation in fault conditions are avoided by proposing appropriate emulator control structure modifications. Experimental results are obtained for the emulation of machine behavior for various drive inverter gate-drive faults. These experimental results are compared with that obtained from a faulty drive inverter feeding a prototype machine. A close match between the two results is shown to prove the sufficiency and utility of the proposed controller modifications in the developed PHIL-based machine emulation system.

中文翻译：

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驱动逆变器开路故障的基于功率硬件在环的电机仿真研究

机器仿真形式的电源硬件在环（PHIL）仿真在交通运输应用中的电驱动系统测试中越来越受欢迎。由于使用PHIL仿真可以减少设备损坏的可能性，因此它们特别适合于测试电驱动系统以及驱动逆变器故障。本文研究了PHIL仿真，以仿真由于一个或多个开关的栅极驱动故障而导致驱动器逆变器出现故障时的机器行为。提出了对机器仿真器系统的闭环电流控制的修改。这些修改可确保精确仿真由于驱动器逆变器故障而导致的仿真电机电流中的各种低阶谐波。通过提出适当的仿真器控制结构修改，可以避免由于故障条件下的机器行为仿真而导致的驱动逆变器损坏。获得了针对各种驱动器逆变器栅极驱动器故障的机器行为仿真的实验结果。将这些实验结果与从为原型机供电的故障变频器中获得的结果进行了比较。显示了两个结果之间的紧密匹配，以证明在开发的基于PHIL的机器仿真系统中提出的控制器修改的充分性和实用性。将这些实验结果与从为原型机供电的故障变频器中获得的结果进行了比较。显示了两个结果之间的紧密匹配，以证明在开发的基于PHIL的机器仿真系统中提出的控制器修改的充分性和实用性。将这些实验结果与从为原型机供电的故障变频器中获得的结果进行了比较。显示了两个结果之间的紧密匹配，以证明在开发的基于PHIL的机器仿真系统中提出的控制器修改的充分性和实用性。