FPGA implementation of an arbitrary resample rate, FOH, pulse width modulator

Broadmeadow, Mark A. H.; Burstinghaus, Edward J.; Walker, Geoffrey R.; Ledwich, Gerard

doi:10.1049/joe.2018.8021

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…By replacing the zero-order hold (ZOH) with the first-order hold (FOH) in the sampling process, the modulation signal is more like a continuous signal using the MSMU PWM. The arbitrary sampling rate can be used with the improved harmonic performance, linearity, and phase delay compared with the ZOH sampler [19][20]. The transfer functions of the FOH and the ZOH are…”

Section: ) With Changed Carrier or Sampling Processmentioning

confidence: 99%

“…In order to suppress the aliasing, various repetitive filters are proposed in DC-DC and DC-AC converters, where the introduced phase lag is the main optimization goal [13][14][15][16]. Another switching ripple suppression method is to change the sampling process or the carrier, but the feasibility should be further investigated [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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A Review of Multisampling Techniques in Power Electronics Applications

Zhou

Wang

et al. 2022

IEEE Trans. Power Electron.

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Due to the increasing performance and decreasing price of microcontrollers in recent years, applying a high sampling frequency becomes more feasible in modern control that is known as multi-sampling technology. The first motivation to use multisampling is emulating the analog control, and thereby reducing the control delay and improving the stability of power electronics controllers. On the other hand, more information can be acquired from the multi-sampled current/voltage, which helps to save the cost and improve the reliability. In this paper, a review of the multi-sampling application in power electronics converters is provided. Starting from the control delay analysis in single/double-sampling control, the modelling, implementation and related control strategies are given when using multi-sampling pulse width modulation (PWM). Then, based on the multisampled data, the applications in condition monitoring and parameter estimation are discussed. Lastly, perspectives on challenges and future trends are discussed.

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Section: ) With Changed Carrier or Sampling Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of Multisampling Techniques in Power Electronics Applications

Zhou

Wang

et al. 2022

IEEE Trans. Power Electron.

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“…The control node also implements three, phase accumulator carrier pulse‐width modulators (PACPWMs) with arbitrary resample rate zero‐order hold [5]. The modulators are configured for 10 kHz asymmetric PWM with 16‐bit amplitude precision and 32‐bit phase accumulator precision.…”

Section: Experimental Validationmentioning

confidence: 99%

Modular and scalable control and data acquisition system for power hardware in the loop (PHIL) amplifiers

Broadmeadow

Walker

Ledwich

2019

J. eng.

Self Cite

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“…Second, by replacing the zero-order hold with first-order hold in the sampling process, the modulation signal is more like a continuous signal using multi-update PWM. The arbitrary sampling rate can be used with improved harmonic performance, linearity and phase delay compared with zero-order hold [30][31]. But first-order hold based sampler is still new, and the small signal stability analysis and controller design need to be further researched.…”

Section: Introductionmentioning

confidence: 99%

Aliasing Suppression of Multisampled Current-Controlled LCL-Filtered Inverters

Zhou

Wang

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Multisampling control provides an attractive way to reduce the control delays in LCL-filtered grid-connected inverters. Thereby, the bandwidth and stability margin will be improved. However, high frequency switching harmonics (SHs) is introduced in the control loop when the inverter-side current is sampled. In order to investigate the effect of multisampled high frequency SHs, the relationship between the double-update pulse width modulation (PWM) and multiupdate PWM is deduced through geometric deduction. It is shown that the multi-update PWM is equivalent to doubleupdate PWM with sampling instant shift, and the equivalent Nyquist frequency is equal to the switching frequency. Moreover, the non-averaged value of current is sampled within one switching period and aliased low-order harmonics will appear in the grid-side current. Hence, filtering the multisampled SHs is necessary, and an improved repetitive filter is proposed to remove all the sampled SHs and keep the advantage of phase boost by using the multisampling control. The method is evaluated with a single-loop inverter-side current control, and its effectiveness is verified through the simulation and experiment.

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FPGA implementation of an arbitrary resample rate, FOH, pulse width modulator

Cited by 3 publications

References 6 publications

A Review of Multisampling Techniques in Power Electronics Applications

A Review of Multisampling Techniques in Power Electronics Applications

Modular and scalable control and data acquisition system for power hardware in the loop (PHIL) amplifiers

Aliasing Suppression of Multisampled Current-Controlled LCL-Filtered Inverters

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