Results 81 to 90 of about 156,626 (252)
Battery powered high efficiency drive systems in practical applications [PDF]
, 2015 Since about 30 years three-phase variable speed drives are the standard industrial solution when high reliability, high ingress protection of machine and especially high efficiency are required.
Weiss, H.
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Research of method of maintaining high power factor for PWM rectifier
Gong-kuang zidonghua, 2014 In view of problem that serious voltage fluctuation underground may affect unit power factor of power supply, variable output DC voltage method was proposed to control DC side voltage of PWM rectifier, so as to ensure the PWM rectifier working with high ...
ZHENG Lijun, SHEN Yarui, SONG Jiancheng
doaj
Shift & night work – the positive impact, challenges and action to deal with it [PDF]
, 2020 Shift work means work that takes place on a schedule of employee outside the normal hours eight at morning until at five at evening. Well, it involves day and night shifts, which is whether in an early morning shifts, and rotating shifts.
Abdull Rahman, Rabeatul Husna +2 more
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Research of Direct Power Control of PWM Rectifier Based on Virtual Flux Orientatio
Gong-kuang zidonghua, 2011 The paper proposed a direct power control strategy of PWM rectifier based on virtual flux orientation. The strategy controls active power and reactive power of PWM rectifier instead of active and reactive current components of traditional control methods
WANG Hong-qian, LIU Shou-quan
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UNITY POWER FACTOR CONTROL BY PWM RECTIFIER
International Journal of Research in Engineering and Technology, 2013 This paper analyzes the principle of PWM rectifier and presents a unity power factor control method of PWM rectifier. Controller used double closed-loop PI control, which inner use s three-phase input current control method controll ed by unity power factor and outer controls the output DC voltage of rectifier.
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Control strategy for single-phase PWM rectifiers
Electronics Letters, 1997 A new control strategy is proposed for single-phase pulsewidth modulation (PWM) rectifiers of the voltage-source type. The method eliminates the need for sensing the AC-side current. Analysis of the method and computer simulation results for steady-state operation are presented.
O. Kukrer, H. Komurcugil
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Input current shaped ac-to-dc converters [PDF]
Input current shaping techniques for ac-to-dc converters were investigated. Input frequencies much higher than normal, up to 20 kHz were emphasized. Several methods of shaping the input current waveform in ac-to-dc converters were reviewed.
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Shanghai Jiaotong Daxue xuebaoAiming at the problem of abnormal operation of three-phase voltage-type pulse width modulation (PWM) rectifier caused by factors such as voltage transformation and external disturbances, a control strategy is proposed that integrates active disturbance ...
HUANG Zixin, YU Chengsong, WANG Wei, LIN Mengying, XU Da
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机车电传动, 2013 Aim to 4-quadrant PWM rectifier of CRH3 high-speed EMUs traction system, a predictive current control method based 4-quadrant PWM rectifier simulation model with Matlab/Simulink was established based on principle and control scheme analysis.
WANG Xing-hua +2 more
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Research on Three-Phase Cascade PWM Rectifier
IOP Conference Series: Materials Science and Engineering, 2018 For the application of high voltage and high power, a three-phase six-module cascade rectifier topology is proposed for high voltage and high power conditions, And analyze this topology from the working principle and control strategy. In order to achieve unity power factor, a control strategy based on carrier phase shift method for reactive power and ...
Yongchao Zhou, fei Yu
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