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PWM rectifier
About: PWM rectifier is a research topic. Over the lifetime, 2254 publications have been published within this topic receiving 25614 citations.
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10 Apr 1989
TL;DR: In this paper, the authors proposed to suppress the fluctuation of DC output voltage at the time of the service interruption of an AC power source by feeding DC power to a high power-factor converter from a storage battery with a DC power feeding means consisting of switches and the like, and by working the high power factor converter as a step-up chopper.
Abstract: PURPOSE: To suppress the fluctuation of DC output voltage at the time of the service interruption of an AC power source by feeding DC power to a high power-factor converter from a storage battery with a DC power feeding means consisting of switches and the like, at the time of the service interruption of the AC power source, and by working the high power-factor converter as a step-up chopper. CONSTITUTION: When service interruption is generated in an AC power source 1, then a switch 9 is turned OFF, and a switch 10 is turned ON, and a switch 11 is turned OFF, and the DC power of a storage battery 6 is fed to a high power-factor converter, and a PWM rectifier 3 is worked as a step-up chopper. Then, even if the voltage of the storage battery 6 is lowered, the output voltage of the PWM rectifier 3 namely the voltage of a capacitor 4 is made higher than the voltage of the storage battery 6, and the DC output voltage of a power supply unit is controlled to be constant. As a result, the fluctuation width of the DC output voltage at the time of the service interruption of the AC power source 1 can be suppressed to be slight. COPYRIGHT: (C)1990,JPO&Japio
6 citations
01 Nov 2013
TL;DR: In this paper, a cascaded sliding mode control method with global stability and online observation of load power was proposed to improve the system stability limit constrained by catastrophic bifurcation.
Abstract: It can be seen presently widespread electrification of high power vehicular systems such as more electric aircrafts and electric ships To further improve the efficiency, flexibility and reliability of such systems, zonal DC electric distribution technology is proposed In most cases, the zonal DC bus is fed by front-end AC/DC voltage source rectifiers and is responsible for supporting many onboard loads with complex dynamic characteristics Due to the small-signal constant power nature of tightly regulated power electronic loads and the large-signal load variations, stability of the zonal DC bus becomes a major concern It is clear that conventional PI controllers stabilize the system in a small-signal sense However, they are ineffective under some large-signal disturbances and load changes Passivity based control method is known to provides global stability under passive loads, such as resistive loads Nonetheless, the global stability of voltage regulation with nonlinear loads has not been discussed This paper proposes a cascaded sliding mode control method with global stability and online observation of load power Moreover, system stability limit constrained by catastrophic bifurcation is also discussed Simulation results are provided to verify the proposed method
6 citations
TL;DR: In this paper, an alternative approach to tackle the problem by using not only an input-output map linearization controller, with the aim of a single-loop current control, but also by avoiding the dq modeling.
Abstract: This paper deals with a battery energy storage system (BESS) in only one of its multiple operating modes, that is when the BESS is charging the battery bank and with the focus on the control scheme design for the BESS input stage, which is a three-phase LCL-filter PWM rectifier. The rectifier’s main requirements comprise output voltage regulation, power factor control, and low input current harmonic distortion, even in the presence of input voltage variations. Typically, these objectives are modeled by using a dq model with its corresponding two-loop controller architecture, including an outer voltage loop and a current internal loop. This paper outlines an alternative approach to tackle the problem by using not only an input–output map linearization controller, with the aim of a single-loop current control, but also by avoiding the dq modeling. In this case, the voltage is indirectly controlled by computing the current references based on the converter power balance. The mathematical model of the three-phase LCL-filter PWM rectifier is defined based on the delta connection of the filter, which accomplishes the requirements of a 100 kW BESS module. Extensive simulation results are included to confirm the performance of the proposed closed-loop control in practical applications.
6 citations
01 Nov 2014
TL;DR: Experimental result demonstrates that balanced source currents with a power factor of 0.9, which is an acceptable value in Japanese home appliances, are obtained on the secondary side of the pole-mounted distribution transformer during the battery charging operation in the EVs, reducing the capacity of the smart charger by 36% as compared with that of thesmart charger with the previously proposed control strategy.
Abstract: This paper proposes a novel reactive power control strategy to reduce the capacity of the previously proposed smart charger for electric vehicles (EVs) on single-phase three-wire distribution feeders. The proposed reactive power control strategy is based on the constant dc-capacitor voltage control of the grid-connected PWM rectifier. Any calculation blocks of load-side active current are not needed. Thus, we offer the simplest reactive power control strategy. The basic principle of the proposed reactive power control strategy is discussed in detail, and then confirmed by a digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental result demonstrates that balanced source currents with a power factor of 0.9, which is acceptable value in Japanese home appliances, are obtained on the secondary side of the pole-mounted distribution transformer during battery charging operation in EVs reducing the capacity of the smart charger by 36% as compared with that of the smart charger with the previously proposed control strategy.
6 citations
17 Oct 2013
TL;DR: In this article, an instantaneous current control method is applied to the PWM rectifier of a single-phase contactless power transformer system to reduce the switching loss due to higher operating frequency.
Abstract: In the case of contactless power transfer system with the electromagnetic induction, the coupling coefficient between the coils is reduced by the misalignment of the receiving coils This results in reduction of the output voltage and the active power in the coils To cope with this problem, an instantaneous current control method is applied to the PWM rectifier of a single-phase contactless power transformer system The switching loss increases due to higher operating frequency In this paper, PWM rectifier with the control method is operated with single-pulse PWM mode to reduce the switching losses It is revealed by experimental tests over a power range of several tens of watts that the proposed control method is effective even if the PWM rectifier is operated with single-pulse mode
6 citations