High-Frequency Auxiliary Inverter With Pulsating DC Link and Study of SRSPWM Method

doi:10.11985/2017.02.002

Abstract

Abstract:

In order to ensure high-frequency auxiliary inverter with the high quality of the output voltage, the single-reference six-pulse width modulation (SRSPWM) hybrid modulation strategy is introduced in the paper. The before class adopts phase-shift PWM modulation that the shift angle decided by the duty ratio of six pulse and triangular while the after class realizes the demodulation that only one-third of a fundamental cycle is in modulation condition and this can reduce the switching loss greatly compared with the traditional SPWM modulation using SRSPWM modulation strategy. The feasibility of the modulation method is verified by mathematical deduction, and the hybrid modulation strategy is verified through simulations and experiments.

Key words: High-frequency auxiliary inverter with pulsating DC link, single-reference six-pulse width modulation (SRSPWM), harmonic analysis, output LC filter

CLC Number:

TM464

Yujie Chang,Zhaoyang Zhou,Chun Yang,Xuefei Li,Huiqing Du. High-Frequency Auxiliary Inverter With Pulsating DC Link and Study of SRSPWM Method[J]. Journal of Electrical Engineering, 2017, 12(2): 8-14.

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项目	质量/kg	功率/kV·A	功率密度
混合动力动车组	1 050	100	0.095 2
广州地铁1号线	480	77	0.160 4

	T₁	T₂	T₃	T₄	T₅	T₆
S₁,	V_ab/V_cb	1	1	V_ac/V_bc	0	0
S₃,	0	0	V_bc/V_ac	1	1	V_ba/V_ca
S₅,	1	V_cb/V_ab	0	0	V_ca/V_ba	1

功率器件	产品型号	额定电压/V	额定电流/A
Q₁~Q₄	FF400R33KF2C	3 300	400
VD₁~VD₄	MEO450-12DA	1 200	450
S₁?S₆	FS450R12OE4	1 200	450

调制策略	载波比	f_c/Hz	L/mH	C/mF
SPWM	/40	209.303 7	0.883 28	654.62
SPWM	40/20	231.305 6	0.791 25	598.35
SRSPWM	40/40	75.113 6	2.5	1 800
SRSPWM	80/40	249.252 4	0.741 72	549.7