A Novel PWM Technique With Two-Phase Modulation

Lu, Haifeng; Qu, Wenlong; Cheng, Ximing; Yang, Fan; Zhang, Xing

doi:10.1109/tpel.2007.909250

Cited by 51 publications

(19 citation statements)

References 13 publications

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“…The main distinguishing features of the TSPWM are: reduced CMV [25]- [27], lower switching losses [26], smaller dc current ripple [28], and easier implementation [26]. This paper further explores the SCSO value of TSPWM.…”

Section: B Principle Of Tspwmmentioning

confidence: 99%

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A Three-Phase Current Reconstruction Technique Using Single DC Current Sensor Based on TSPWM

Cheng²,

et al. 2014

IEEE Trans. Power Electron.

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Three-phase current reconstruction technique using dc current information in conventional two-level inverters can be used for the purpose of cost reduction and sensor fault tolerance. A novel phase current reconstruction scheme, with reduced immeasurable area and common mode voltage, is proposed in this paper. A tristate pulse-width modulation technique has been employed, in which three adjacent switching states are used to construct the reference voltage. The active switching states are arranged at the edge and the center of a PWM cycle. Fixed sampling and simultaneous three-phase currents can be easily achieved with very little hardware and software requirements. A detailed analysis of the effects of nonidealities leads to regional modifications of the switching sequence resulting in almost the whole hexagon as the feasible area. The usefulness of the proposed reconstruction algorithm has been verified by experimental results obtained from a 4-kW induction motor drive system. Smooth transitions between the redundant and fault-tolerant modes were observed.

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Section: B Principle Of Tspwmmentioning

confidence: 99%

“…3(a). It should be noted that the transition between Region L and Region H can be realized smoothly [26].…”

Section: B Principle Of Tspwmmentioning

confidence: 99%

A Three-Phase Current Reconstruction Technique Using Single DC Current Sensor Based on TSPWM

Cheng²,

et al. 2014

IEEE Trans. Power Electron.

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“…Also, at low frequency ratios, carrier wave synchronizing with the modulating wave is important in controlling the sub harmonics. With SVPWM method, the switches of the inverter are controlled based on the comparison of sinusoidal control signal with a triangular switching signal [8]. The sinusoidal control waveform represents the desired fundamental frequency of the inverter output, while the triangular waveform represents the switching frequency of the inverter.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study and Design Analysis of Several Pulse Width Modulation Control Techniques

Nivetha¹

2015

IJMSR

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-Various PWM techniques are used for controlling the different loads such as R, R L, and RLE. In the existing system the control technique like, TSPWM, Single pulse PWM and Multiple Pulse PWM is Used to control the load, which has Acoustic noise and harmonic distortion .The proposed system reveals the reduction of losses by comparing TSPWM, SVPWM and RPWM .The highest possible peak phase fundamental is higher for SVPWM than TSPWM, and the RPWM technique offers significant benefits over deterministic PWM when implementing motor drive system.

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“…When current amplitudes of switches are the same, their SW losses are almost proportional to the number of switching transitions. Therefore, techniques for reducing the number of switching transitions, such as the two-phase modulation method (1)- (4) , are effective because they generate equivalent PWM waveforms with fewer switching transitions than conventional PWM techniques. In fact, the amplitudes of the three phase currents are different, and an SW pattern (SP) which avoids switching of large phase currents, effectively reduces the SW loss (5)- (8) .…”

Section: Introductionmentioning

confidence: 99%

Optimum On-line Reduction of Switching Losses with a New Two-Phase PWM Method

et al. 2014

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This paper presents an efficient pulse-width modulation (PWM) method to optimally reduce switching (SW) losses in three-phase neutral-point clamped (NPC) inverters in one switching cycle using a new two-phase modulation scheme. The proposed method digitally selects an optimum switching vector (SV) pattern, which minimizes an estimation function based on switching losses considering phase currents among possible reduction patterns for one switching cycle. The proposed modulation method is further extended to reduce common-mode voltages in three-phase NPC inverters. The basic principle involves elimination of the common-mode voltage by limiting the combinations of the output phase voltage levels of the three-level NPC inverter. A modified space vector generation technique based on the two-phase modulation method is proposed to reduce both common-mode voltages and switching losses. The proposed PWM method was experimentally verified for output voltages of the NPC inverter connected to a universal load. The method reduced the number of switching transitions for the largest or second largest current, and it can automatically adapt to different load conditions. The method was also experimentally validated for its EMC and switching loss reduction capability.

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A Novel PWM Technique With Two-Phase Modulation

Cited by 51 publications

References 13 publications

A Three-Phase Current Reconstruction Technique Using Single DC Current Sensor Based on TSPWM

A Three-Phase Current Reconstruction Technique Using Single DC Current Sensor Based on TSPWM

Comparative Study and Design Analysis of Several Pulse Width Modulation Control Techniques

Optimum On-line Reduction of Switching Losses with a New Two-Phase PWM Method

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