Sampling averaging for inverter control

Masoud, Khalid Hasan; Ledwich, Gerard

doi:10.1109/psec.2002.1023055

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…In order to give full play to the role of the piezoelectric ceramic transformer, keep the step-up ratio, it is necessary that track the resonant state, and in a timely manner to adjust the input signal frequency, make it match the resonance frequency of the piezoelectric ceramic transformer [10]. In figure 3, the voltage signal from Terminal fv and the input alternating voltage of the PZT are the same in frequency and the phase, the voltage signal from Terminal fi and the input alternating current of the PZT are the same in frequency and the phase, the terminal fo is used as public reference terminal.…”

Section: B Circuit Design For High Voltagementioning

confidence: 99%

Insulation resistance precheck unit of low voltage circuit breaker based on piezoelectric ceramic transformer

2014

2014 IEEE Workshop on Advanced Research and Technology in Industry Applications (WARTIA)

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The main line insulation predetection unit embedded in the low voltage circuit breaker was designed aiming at the prevention of accidents, which take place in the closing operation in low voltage power supply system. The overall structure was introduced. Piezoelectric ceramic transformer high voltage generating circuit and Insulation resistance detection circuit were demonstrated in details. The results of the experiments show that the unit is effective and the measurement reference error is less than 5%, it is suitable for prechecking the main line insulation state of the load side before the low voltage circuit breaker closing.

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Section: B Circuit Design For High Voltagementioning

confidence: 99%

Insulation resistance precheck unit of low voltage circuit breaker based on piezoelectric ceramic transformer

2014

2014 IEEE Workshop on Advanced Research and Technology in Industry Applications (WARTIA)

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“…For instance, a c 2014 The Institute of Electrical Engineers of Japan. sample noise reduction method using a reset integrator is introduced (10) . The capability of computers currently available has enabled real-time digital feedback control of the Pulse Width Modulator (PWM) inverter.…”

Section: Introductionmentioning

confidence: 99%

A Highly Reliable Digital Current Control using an Adaptive Sampling Method

et al. 2014

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A sampling algorithm to immunize digital control power converters with triangular carrier waveforms against switching noise is introduced. Many converter circuits employ a sawtooth carrier waveform; however, no optimal sampling method has been presented that avoids switching noise. As demonstrated by the experiments conducted in this research, there are cases where converter circuits are not correctly controlled and sample values are affected by switching noise via current sensors or AD converters. As a result, the output is unstable and inaccurate thus reducing the reliability of the converter.This paper proposes an adaptive sampling method for a digital control current-mode power converter circuit on an FPGA (Field Programmable Gate Array) with the PWM (Pulse Width Modulator) sawtooth carrier waveform. To avoid noise overshoot and undershoot during the MOSFET's switching process, the sampling timing of the AD converter is adaptively tuned according to the duty ratio of each switching cycle. We further introduce a random phase noise generator, to conduct simulations as realistic as practical experiments. We also present simulation and experimental results of the proposed methodology illustrating cases of successful noise avoidance. Thus, we verify that the proposed sampling method improves the reliability of power converter circuits.

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“…But, most of these papers have reported results regarding the nonlinear characteristics of resetting integrator [6] as a controller to generate duty ratio for PWM. Recently the results on noise immunity of linearly resetting integrator have also been described in some papers [7], [8].…”

Section: Introductionmentioning

confidence: 99%

On using resetting integrator in current control loop for active power filter

Zhou

Khan

Yao

et al. 2005

2005 International Power Engineering Conference

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Current control loops is the key element in the control structure of active power filter systems. Among linear control techniques, deadbeat control has widely been accepted as a feasible current control technique as far the DSP implementation of APF is concerned. This control technique that uses high gains on the errors measured at one sample is very sensitive to any error or noise in the measurements, which is always there in electrical systems. Especially, the periodic noise in parallel implementation of an inverter or APF demands a higher order filter at the current transducer output, which affects the system dynamic response. Recently few papers have reported the results about the use of resetting integrators as filter in some electronic applications. This paper is an attempt to show possible application of resetting integrator as filter to current control for APF, where linear control methods have better frequency characteristics and current response than general deadbeat control. Simulation and experiment verify that these filters can be adopted to improve the performances of a current loop in APF.Index Terms--active power filter，current control technique, deadbeat control, noise rejection, proportional control, proportional differential control, resetting integrator, robustness, stability, triangular tracking PWM.

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Sampling averaging for inverter control

Cited by 6 publications

References 1 publication

Insulation resistance precheck unit of low voltage circuit breaker based on piezoelectric ceramic transformer

Insulation resistance precheck unit of low voltage circuit breaker based on piezoelectric ceramic transformer

A Highly Reliable Digital Current Control using an Adaptive Sampling Method

On using resetting integrator in current control loop for active power filter

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