Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 35, Issue 10, Pages 10673-10680Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.2976143
Keywords
Emulation; Impedance; Electric machines; Regulators; Mathematical model; Maximum likelihood detection; Nonlinear filters; DC-AC converter; electric machine; emulator; impedance regulation; testing
Categories
Funding
- National Nature Science Foundation of China [51777123]
- Power Electronics Science and Education Development Program of Delta Group
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Power-electronics-based emulators have been showing promising prospects in advanced testing of various applications of power electronics systems. For electric machine applications, typical machine emulators calculate the references of stator current in response to terminal voltages via mathematical models of the machine system, and then, the current behaviors of emulators are regulated by using feedback controls. However, the dynamic and high-frequency performances of these machine emulators could be distorted by the introduced control loops, thus compromising the emulating performances. In this article, the limits of typical machine emulators are analyzed, and a new approach is proposed for the real-time emulation of permanent magnet synchronous machines (PMSM). A linear regulator without feedback control loop is proposed and designed to reshape the frequency-domain characteristics of the converter and current filter inside the emulation system. Compared with typical solutions, the proposed approach has frequency-domain characteristics closer to the target PMSM. The dynamic performances can be more accurately recreated, and the applicable frequency range for emulation can be extended. Simulations and experimental validations are also conducted to verify the effectiveness of the proposed approach.
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