Dynamic current control using synchronous pulse‑width modulation
for permanent magnet machines

Hyeon‑gyu Choi; Jung‑Ik Ha

Dynamic current control using synchronous pulse‑width modulation for permanent magnet machines

Hyeon‑gyu Choi

Jung‑Ik Ha

Vol. 20, No. 2, pp. 501-510, Mar. 2020

10.1007/s43236-020-00038-2

AC machine

Current control

Pulse modulation

Space vector pulse-width modulation

Abstract

It is difficult to use the conventional fixed sampling pulse-width modulation (PWM) method in a motor drive system due to the harmonics and beat phenomenon when the number of switchings is low. Synchronous PWM is a solution to overcome these problems. However, it is difficult to implement a closed-loop current controller, since synchronous PWM only has merits when the switching frequency is synchronized with the operation speed. This paper proposes a closed-loop current controller for synchronous permanent magnet machines which are driven by synchronous PWM. The proposed controller uses the concept of variable time step control. The control variables are the sampling time interval and the output voltage magnitude. The proposed controller dynamically controls the dq-currents, while the steady-state merits of the synchronous PWM are maintained. This paper presents the design procedures and a dynamic analysis of the proposed current controller. The effectiveness of the proposed method is verified by experimental results.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

H. Choi and J. Ha, "Dynamic current control using synchronous pulse‑width modulation for permanent magnet machines," Journal of Power Electronics, vol. 20, no. 2, pp. 501-510, 2020. DOI: 10.1007/s43236-020-00038-2.

[ACM Style]

Hyeon‑gyu Choi and Jung‑Ik Ha. 2020. Dynamic current control using synchronous pulse‑width modulation for permanent magnet machines. Journal of Power Electronics, 20, 2, (2020), 501-510. DOI: 10.1007/s43236-020-00038-2.