A versatile power-hardware-in-the-loop based emulator for rapid testing of electric drives

In this paper a power-hardware-in-the-loop (PHIL) based machine emulator is developed. The main utility of this PHIL based machine emulation system is in testing the driving inverter and controller of an electric drive system. This paper presents an inductive filter to interface the PHIL emulator and the driving inverter, simplifying the control of the proposed machine emulator, significantly. A detailed analysis of the machine emulator control to accurately emulate the machine model behavior is also presented. Furthermore, the machine emulator discussed in this paper, uses finite element analyses (FEA) based machine models, which allows emulation of the machine's geometric and magnetic characteristics, thus greatly improving the emulation accuracy. Real-time simulations are presented to validate the proposed machine emulator control and functioning, followed by experimental validation of the results with a surface-mounted permanent magnet synchronous motor (PMSM) coupled to a DC dynamometer. Experimental results are also presented in this paper to verify the machine emulator control with transients and bidirectional power flow capability.

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