Compatibility Issues Between the Filter and PWM Unit in Three-Phase AC Motor Drives Utilizing the Pure Sine Filter Configuration

Cetin, N. Onur; Hava, Ahmet M.

doi:10.1109/tia.2011.2168935

Cited by 21 publications

(2 citation statements)

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“…Due to the increase of the PWM switching frequency in the application field, the occurrence of such problems has been increasing. Therefore, CMV reduction techniques have been the subject of much attention [5]- [7]. The CMV and the resulting CMC can be reduced in both passive and active ways.…”

Section: Introductionmentioning

confidence: 99%

Common-Mode Voltage Reduction of Three-Level Four-Leg PWM Converter

Chee

Kim

et al. 2015

IEEE Trans. on Ind. Applicat.

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This paper presents a carrier-based pulsewidth modulation (PWM) method that reduces the common-mode voltage (CMV) of a three-level four-leg converter. Based on an analysis of space vector PWM (SVPWM) and sinusoidal-PWM switching patterns, the fourth-leg pole voltage of a three-phase converter, known as the "f pole voltage," is manipulated to reduce the CMV. To synthesize the f pole voltage for the suppression of the CMV, positive and negative pole voltage references of the f leg are calculated. In addition, the offset voltage to prevent distortion of the a, b, and c phase voltages regarding the neutral point is deduced. The proposed PWM strategy can be easily implemented in the software of a DSP-based converter control. The three-level four-leg converter with the proposed PWM algorithm results in a remarkable reduction in the peak-to-peak value of the CMV. From the simulation and the experimental results, the peak-to-peak value of the CMV when using the proposed PWM method is 33% compared to that when using the SVPWM method, while the number of CMV transitions during the switching period in the proposed PWM method is only 25% of that when using the SVPWM method. Index Terms-Common-mode current (CMC), common-mode voltage (CMV), pulsewidth modulation (PWM), push-pull PWM (PPPWM), sinusoidal PWM (SPWM), space vector PWM (SVPWM), three-level four-leg converter. 0093-9994

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Section: Introductionmentioning

confidence: 99%

Common-Mode Voltage Reduction of Three-Level Four-Leg PWM Converter

Chee

Kim

et al. 2015

IEEE Trans. on Ind. Applicat.

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“…This CMV is reported to be one of the principle reasons for early bearing damage and therefore reduces the life of the motor bearings [1]. Bearing current leading to early bearing damage problems because of PWM drives are analysed in [2] and some solutions are also proposed as reported in [2–4]. Detailed analysis of the coupling in machines that produces the shaft fatigue is reported in [5].…”

Section: Introductionmentioning

confidence: 99%

Pulse width modulation schemes enabling single DC power source driven dual two‐level voltage source inverter with single voltage source inverter switching

Srinivas

Kalaiselvi

2014

IET Power Electronics

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Three-level voltage space phasor can be obtained using a dual two-level voltage source inverter (VSI). Two zero sequence voltage elimination pulse width modulation (PWM) switching variants are proposed in this paper for complete elimination of zero sequence voltage (ZSV) in the dual-VSI scheme. Both the PWM variants are designed in such a way that only one inverter is switched at any instant of time; to ensure that switching power losses in the dual-VSI is limited to one inverter only at any instant of time. Analytical expressions for the dwell times of the dual-VSI are developed and presented that successfully forces the ZSV in the dual-VSI to zero; at all instants of time. As a result, both the PWMs facilitate the dual-VSI to be driven from a single DC power source only. The implementation of the proposed PWM algorithms is greatly simplified and involves just the use of instantaneous magnitudes of the reference space vector. The implementation of PWMs totally avoids the time consuming task of sector identification and do not use look up tables. The PWMs proposed in this paper are first analysed, simulated using MATLAB/SIMULINK and then verified experimentally to validate the proposed PWMs.

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