Investigation of the limiting factors of the dead time minimization in a H-bridge IGBT inverter

Si, Guangye; Shen, Zhenjiang; Zhang, Zhenbin; Kennel, Ralph

doi:10.1109/spec.2016.7845530

Cited by 7 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dead time should be considered in the design phase of the inverter system and possible solutions to the minimization of dead time duration were also discussed in the literature [27]. Nonetheless, the inserted dead time potentially introduces harmonic distortions in the PWM converter output voltages [17]- [19], which then propagate to the output currents.…”

mentioning

confidence: 99%

Analysis and Mitigation of Dead-Time Harmonics in the Single-Phase Full-Bridge PWM Converter With Repetitive Controllers

Yang

Zhou

Wang

et al. 2018

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

Abstract-In order to prevent the power switching devices (e.g., the Insulated-Gate-Bipolar-Transistor, IGBT) from shootthrough in voltage source converters during a switching period, the dead time is added either in the hardware driver circuits of the IGBTs or implemented in software in Pulse-Width Modulation (PWM) schemes. Both solutions will contribute to a degradation of the injected current quality. As a consequence, the harmonics induced by the dead time (referred to as "dead time harmonics" hereafter) have to be compensated in order to achieve a satisfactory current quality as required by standards. In this paper, the emission mechanism of dead time harmonics in single-phase PWM inverters is thus presented considering the modulation schemes in details. More importantly, a repetitive controller has been adopted to eliminate the dead time effect in single-phase grid-connected PWM converters. The repetitive controller has been plugged into a proportional resonant-based fundamental current controller so as to mitigate the dead time harmonics and also maintain the control of the fundamentalfrequency grid current in terms of dynamics. Simulations and experiments are provided, which confirm that the repetitive controller can effectively compensate the dead time harmonics and other low-order distortions, and also it is a simple method without hardware modifications.

show abstract

mentioning

confidence: 99%

Analysis and Mitigation of Dead-Time Harmonics in the Single-Phase Full-Bridge PWM Converter With Repetitive Controllers

Yang

Zhou

Wang

et al. 2018

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

show abstract

“…To compensate for the distortion, in the proposed method, u = u + uM is defined when u < uM. Notably, the MPWL duration is usually two times longer than the deadtime for safety, which is determined by the turn-off transition interval time of the power device (i.e., ud > toff) [31] Next, the proposed compensation principle is illustrated referring to Fig. 8.…”

Section: B Compensation For the Mpwlmentioning

confidence: 99%

Modulation for the AVC-HERIC Inverter to Compensate for Deadtime and Minimum Pulsewidth Limitation Distortions

Tang

Yang

et al. 2020

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

With the superiority in leakage current suppression, the active voltage clamping highly efficient and reliable inverter concept (AVC-HERIC) has become a promising candidate in low-and medium-power PV systems. In addition, the high power density and low system costs have been attained in the AVC-HERIC due to the removal of the isolation transformers. However, to maintain high efficiency and good power quality under reactive power injection, prior-art modulation methods for the AVC-HERIC should be modified. In this paper, a simple modulation scheme is proposed for the AVC-HERIC, which ensures bidirectional current flow at any time. An improved modulation scheme is implemented according to the reference voltage polarity, and it is integrated into the proposed scheme to enable flexible reactive power injection. Moreover, the improved modulation scheme can maintain the same high efficiency as adopting the unipolar pulse width modulation (UP-PWM) strategy. More importantly, the deadtime and minimum pulse width limitation (MPWL) distortions are compensated effectively by the proposed modulation, leading to a good power quality. Simulations and experimental tests are performed on a 3-kW AVC-HERIC, and the results verify the effectiveness of the proposed modulation.

show abstract

“…However, the deadtime can cause current harmonics and additional losses in motors, which can shorten the lifetime of inverter-fed motor insulation. Several research studies have addressed the problems of deadtime in PWM inverters and introduced various solutions [17][18][19][20][21][22][23]. To address these problems, the impact of square wave voltage deadtime on the PD and lifetime of the turn-turn insulation of inverter-fed motors is analysed.…”

Section: Introductionmentioning

confidence: 99%

Pulse width modulation voltage source deadtime effect on partial discharge and lifetime of inverter‐fed motor insulation

et al. 2022

View full text Add to dashboard Cite

This paper analyses the impact of square wave pulse voltage deadtime on the partial discharge (PD) and the lifetime of turn‐to‐turn insulation. A bipolar repetitive pulse voltage with a deadtime of 0–10 μs is produced using double half‐bridge solid‐state switches having push–pull technology controlled by a field‐programmable gate array. The mechanism of the discharge process at rising and falling edges of the pulse voltage before and after deadtime is analysed in detail. The discharge amplitude and PD probability at the rising/falling edges of the voltage waveform increase as the deadtime increases from 0 to 10 μs due to the remanent charges. The number of PD and their intensity is higher at the first rising/falling edges of pulse voltage as compared to the second rising/falling edges for all deadtimes 0–10 μs. As the deadtime increases beyond 2 μs, the number of PDs increases and concentrates at a specific phase angle of rising/falling edges. These localise discharges degrade the insulation material and reduce its lifetime. This study helps to identify the inverter‐fed motor insulation faults due to deadtime. It can provide guidelines to motor insulation designers to determine the limit value of deadtime to compensate PD and ensure the safer operation of such motors.

show abstract

Investigation of the limiting factors of the dead time minimization in a H-bridge IGBT inverter

Cited by 7 publications

References 6 publications

Analysis and Mitigation of Dead-Time Harmonics in the Single-Phase Full-Bridge PWM Converter With Repetitive Controllers

Analysis and Mitigation of Dead-Time Harmonics in the Single-Phase Full-Bridge PWM Converter With Repetitive Controllers

Modulation for the AVC-HERIC Inverter to Compensate for Deadtime and Minimum Pulsewidth Limitation Distortions

Pulse width modulation voltage source deadtime effect on partial discharge and lifetime of inverter‐fed motor insulation

Contact Info

Product

Resources

About