Current-Detection-Independent Dead-Time Compensation Method Based on Terminal Voltage A/D Conversion for PWM VSI

Liu, Gang; Wu, Dafang; Jin, Yi; Wang, Miaoran; Zhang, Peng

doi:10.1109/tie.2017.2696480

Cited by 57 publications

(19 citation statements)

References 29 publications

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“…With the same principle, we can get the equivalent voltage of phase B and C. The phase voltage of A defined as U phA can be reconstructed by (23).…”

Section: Phase Voltage Reconstruction Considering Both Factorsmentioning

confidence: 99%

“…Paper [22] uses the voltage integrator to capture the terminal voltage indirectly which will cause sampling error with the existing of lowpass filter or resetting of the integrator. In a specific condition, the integral time is equal to PWM period and the terminal voltage can be obtained by real PWM capturing with a comparator circuit [23], but this method does not consider the voltage drops of diodes and insulated gate bipolar translators (IGBTs). Thus, an accurate and reliable equivalent phase voltage sampling method is necessary.…”

Section: Introductionmentioning

confidence: 99%

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A Desktop Electric Machine Emulator Implementation Method Based on Phase Voltage Reconstruction

Wang

2020

IEEE Access

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An electric machine emulator (EME) system plays a fundamental role in design and validation of hardware and software for power electronic converters and electric drives. In this paper, a desktop digital signal processor (DSP)-based EME is developed for power converters function test. The principle of EME is demonstrated with mathematical derivation. Since the instantaneous phase voltage is either power supply voltage or ground, high-rated voltage sensors are not suitable for DSP-based EME to obtain the average voltage in a pulse-width modulation cycle. To accurately acquiring phase voltages, a method which reconstructs the phase voltage considering the amplitude and duty cycle error is proposed. Voltage drops, dead time, propagation delay, parasitic rising and falling time delay are all considered in reconstructed voltages based on voltage-second balance theory. This is accomplished without any assistant physical circuits. Based on the reconstructed phase voltages, reference current is derived in motor model by using second order Runge-Kutta method. Factors affecting phase voltage accuracy are verified by simulations step by step. The simulation and experimental results support the validity of the proposed method. INDEX TERMS Electric machine emulator (EME), phase voltage reconstruction, compensation time.

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“…With the same principle, we can get the equivalent voltage of phase B and C. The phase voltage of A defined as U phA can be reconstructed by (23).…”

Section: Phase Voltage Reconstruction Considering Both Factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Desktop Electric Machine Emulator Implementation Method Based on Phase Voltage Reconstruction

Wang

2020

IEEE Access

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“…Apart from the dead-time compensation methods which directly adjust the amplitude of the modulation wave according to the current polarity, there are also many other methods, e.g. the current-detectionindependent dead-time compensation method based on terminal voltage A/D conversion [8], the adaptive feed-forward deadtime compensation [9], the dead-time compensation using the integrator output of the synchronous d-axis current PI controller [1], etc. In addition, to compensate the low-frequency current harmonics caused by the dead-time effect, the proportionalresonant (PR) controller and the repetitive controller, which have high gains at harmonic frequencies, can be employed for dead-time compensation [10].…”

Section: Introductionmentioning

confidence: 99%

A DSOGI-FLL-Based Dead-Time Elimination PWM for Three-Phase Power Converters

Yan

Zhao

Yuan

et al. 2019

IEEE Trans. Power Electron.

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“…The dead-time effect as one of the main dominant sources of output current and voltage distortion must be solved in high-precision applications [2]. Because the output voltage error is related to current polarity, the compensation [3]- [4] and elimination [5] methods are hard to completely remove the dead-time effect.…”

Section: Introductionmentioning

confidence: 99%

Initial Resonant Current Control for Extra-LC Auxiliary Resonant Snubber Soft-Switching Inverter Without Filter Inductor Current Sensor

Zhang

Kou

2019

IEEE Access

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The initial resonant current in the extra-LC auxiliary resonant snubber inverter (ELCARSI) is the key parameter to realize soft switching and improve output quality. However, the initial resonant current is related to the filter inductor current. Thus, an extra filter inductor or capacitor current sensor is required, which increases the cost and hardware complexity. Besides, the traditional control strategy using load current to calculate the initial resonant current doesn't require the extra sensor. However, the current stress and output distortion is increased. Thus, an initial resonant current control strategy without filter inductor current sensor is proposed in this paper. The operating principle of ELCARSI is introduced. The output quality and soft switching influenced by the initial resonant current are analyzed. Besides, the proposed sensorless control with estimation of filter inductor current is introduced. A prototype was developed to verify the effectiveness of the control method. The output distortion is close to that of the control with extra sensor. INDEX TERMS Current-sensorless control, soft switching, extra-LC auxiliary resonant snubber inverter.

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Current-Detection-Independent Dead-Time Compensation Method Based on Terminal Voltage A/D Conversion for PWM VSI

Cited by 57 publications

References 29 publications

A Desktop Electric Machine Emulator Implementation Method Based on Phase Voltage Reconstruction

A Desktop Electric Machine Emulator Implementation Method Based on Phase Voltage Reconstruction

A DSOGI-FLL-Based Dead-Time Elimination PWM for Three-Phase Power Converters

Initial Resonant Current Control for Extra-LC Auxiliary Resonant Snubber Soft-Switching Inverter Without Filter Inductor Current Sensor

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