Three‐Phase AC Filter Inductor Design for Three‐Phase PWM Inverter for Conversion Efficiency Improvement at Low Load

SUMMARY The inductor losses in a three‐phase ac filter inductor used in a three‐phase pulse‐width modulation (PWM) inverter are evaluated. First, a three‐phase inductor is designed to obtain the same value of inductance for each phase. Then, based on the design, a three‐phase inductor that uses two...

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Bibliographic Details
Published in:Electrical engineering in Japan 2018-04, Vol.203 (1), p.37-49
Main Authors: MATSUMORI, HIROAKI, SHIMIZU, TOSHIHISA, TAKANO, KOUSHI, ISHII, HITOSHI
Format: Article
Language:English
Subjects:
Conversion
Efficiency
Inductance
inductor
Inductors
iron loss
Magnetic materials
Pulse duration modulation
PWM
Simulation
three‐phase inductor
three‐phase inverter
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Summary:SUMMARY The inductor losses in a three‐phase ac filter inductor used in a three‐phase pulse‐width modulation (PWM) inverter are evaluated. First, a three‐phase inductor is designed to obtain the same value of inductance for each phase. Then, based on the design, a three‐phase inductor that uses two magnetic materials is proposed. The conversion efficiency of a 1 kVA three‐phase PWM inverter that uses the conventional and proposed ac filter inductors is simulated. Simulation results show that conversion efficiency improves. Finally, the conversion efficiency of an actual three‐phase 1 kVA PWM inverter that uses the conventional and proposed ac filter inductors is measured. In the experiment, the conversion efficiency obtained for the case of the proposed inductor improves by approximately 1% at low power load as compared to the conventional inductor. Furthermore, the calculated inductor losses are in good agreement with measured losses. Improvement in efficiency is verified trough simulations and experiments.
ISSN:0424-7760
1520-6416
DOI:10.1002/eej.23053