Current Distortion Analysis of Three-Phase PWM Rectifier in Over-Modulation Region and Application to Air-Cooled Heat Pump Chiller

Kubota, Yohei; Ishida, Keiichi; Kanamori, Masaki; Yanase, Yuki; Endo, T.; Yamanashi, Yasushi; Kanazawa, Hidetoshi

doi:10.1541/ieejias.140.633

Cited by 2 publications

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“…Air conditioners should conserve energy and have low vibration. An interior permanent magnet synchronous motor (IPMSM), widely used as a compressor, is controlled by inverters to conserve energy in air conditioners (1) - (4) . Generally, single-phase motor drive systems require a large-capacity electrolytic capacitor in the dc-link to provide stable power to the motor.…”

Section: Introductionmentioning

confidence: 99%

Control Method of Electrolytic Capacitor-Less Dual Inverter-Fed IPMSM under Periodic Load Torque Fluctuations

2022

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This paper proposes a control method for an electrolytic capacitor-less dual inverter for compressors. Single-phase motor drive systems are required to minimize vibrations, maintain a high power factor, and meet the limit for harmonic current emissions. The proposed control method achieves the harmonic reduction of the dq-axis currents, a high power factor, and a low grid current THD under periodic load torque fluctuations. The effectiveness of the proposed method is demonstrated via experimental results, using an open-end winding IPMSM and an electrolytic capacitor-less dual inverter. The proposed method reduced the 100 Hz harmonic components of dq-axis currents up to 98 % under periodic load torque fluctuations compared with an electrolytic capacitor-less single inverter. The results of FFT analysis of the input current show that the power factor and input current THD of the proposed method are equivalent to or superior to those of conventional methods. Therefore, the proposed control method can effectively achieve vibration reduction, a high power factor, and a reduction in the input current THD under periodic load torque fluctuations.

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Section: Introductionmentioning

confidence: 99%

Control Method of Electrolytic Capacitor-Less Dual Inverter-Fed IPMSM under Periodic Load Torque Fluctuations

2022

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“…The motor drive systems require a high-efficiency operation not only at a rated-load condition. In particular, in air conditioner applications, efficiency improvement in the light to middle load range, in which the load is 75 % or less, is required (1) . The operating time of a compressor such as a room air-conditioner is longer than the rated condition for a partial-load.…”

Section: Introductionmentioning

confidence: 99%

Voltage Harmonic Analysis of Typical PWM Strategies in a Dual Inverter with Floating Capacitor in the Partial-Load Condition

Mizukoshi

Haga

2022

IEEJ Journal IA

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This study aims to reduce the voltage harmonics, caused by pulse width modulation (PWM) in a dual inverter with a floating capacitor topology in the partial-load condition. This work provides an analysis strategy for the output voltage harmonics, which depend on the fundamental voltage, power factor angle, and PWM strategies. Herein, sinusoidal PWM (SPWM), third harmonic injection PWM (THIPWM), and discontinuous PWM (DPWM) are used as the conventional carrier-based modulation techniques, and space vector PWM (SVPWM) and near-state PWM (NSPWM) with reduced number of commutations are used as the proposed modulation methods. The validity of the theoretical analysis is then confirmed by experiments using an open-end winding induction motor. The voltage total harmonic distortion (THD) is reduced by maximizing the modulation indices of both inverters in each modulation method; the experimental results show that voltage THD reductions of 10.9% with NSPWM and 17.3% with SVPWM can be obtained compared with that of SPWM. The total efficiency, including the inverter and motor efficiencies, is improved by up to 2.6% in the low load region (at a torque of 0.5 Nm and fundamental frequency of 10 Hz) when using the SVPWM.

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Current Distortion Analysis of Three-Phase PWM Rectifier in Over-Modulation Region and Application to Air-Cooled Heat Pump Chiller

Cited by 2 publications

References 0 publications

Control Method of Electrolytic Capacitor-Less Dual Inverter-Fed IPMSM under Periodic Load Torque Fluctuations

Control Method of Electrolytic Capacitor-Less Dual Inverter-Fed IPMSM under Periodic Load Torque Fluctuations

Voltage Harmonic Analysis of Typical PWM Strategies in a Dual Inverter with Floating Capacitor in the Partial-Load Condition

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