Digital Signal Processing Circuits for Digital Class-D Power Amplifiers

Sozański, Krzysztof

doi:10.1007/978-1-4471-7332-8_6

Cited by 4 publications

(24 citation statements)

References 21 publications

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“…It consists of a power electronic circuit, which includes electronic switches such as IGBTs, MOSFETs, capacitors, magnetic components, and a digital controller. The control algorithm is implemented in the digital controller, which is responsible for controlling the operation of the power electronic circuit [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47].…”

Section: Power Electronic Circuitmentioning

confidence: 99%

“…Figure 2 shows an instance of a power electronic circuit that utilizes an open-loop multirate digital control circuit. This type of circuit is commonly used in control systems for DC/DC, DC/AC, AC/DC, and AC/AC converters, as well as active power filters, among other applications [37,42]. An open-loop system was chosen due to its ease of analysis.…”

Section: Control Signals Reference Signals Measurements Feedback Meas...mentioning

confidence: 99%

“…From the point of view of the operation of the entire power electronic circuit, it important to obtain the required parameters of input and output voltages and curren The quality of the output voltage and current of the power electronic circuit is a critic concern, and the following signal parameters should be taken into account: the sign sampling ratios (fs1, fs2, and fs3), signal resolutions (b1, b2, and b3), transistor switching fr quency (fc), total harmonic distortion ratio (THD), output signal-to-noise ratio (SNR), an output signal-to-noise and distortion ratio (SINAD) [37,[49][50][51][52][53]. The required SINAD valu of the output current or voltage of a power electronic circuit depends on the applicatio For instance, a SINAD value of 30 dB may be sufficient for a battery charger, while a hig quality class-D audio amplifier may require a SINAD value of over 100 dB.…”

Section: Selected Signal Parametersmentioning

confidence: 99%

“…The previous paragraphs have discussed only linear circuits, but in practice, it is always possible to encounter nonlinearity; hence, it is crucial to take into account the influence of harmonics on signal dynamics. The parameter which completely describes the space between the signal and interference is the signal-to-noise and distortion ratio (SINAD) [37,[49][50][51][52][53]. SINAD is the ratio of the wanted signal (the fundamental) to the sum of all distortion and noise products after the DC term is removed.…”

Section: Sinadmentioning

confidence: 99%

“…Consequently, the number of publications devoted to power electronics is enormous (e.g., [1][2][3][4][5][6][7][8][9][10]), and similarly, many publications describe problems of digital signal processing (e.g., [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]). Only a few publications describe digital signal processing in the context of power electronics [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Overview of Signal Processing Problems in Power Electronic Control Circuits

Sozański

2023

Energies

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This paper examines various aspects related to digital signal processing in digital control circuits used in power electronics. The discussion focuses on several common issues, including the sampling rate of signals (including phenomena such as aliasing and synchronization), coherent sampling, jitter of sampling pulses, sequential versus simultaneous sampling in multichannel systems, signal resolution (including signal-to-noise ratio, noise-shaping circuits, and changes in sampling speed), interpolation and decimation, and the conversion of analog circuits into digital form. One of the key contributions of this paper is the introduction of a new formula for calculating the resultant signal-to-noise ratio for three-stage digital control circuits. By carefully considering and correcting for sources of error, it is possible to increase the signal-to-noise ratio and minimize distortion components. This, in turn, leads to improved output/input current and voltage parameters, which can have a positive impact on the overall quality of energy processing in power electronic circuits.

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Section: Power Electronic Circuitmentioning

confidence: 99%

Section: Control Signals Reference Signals Measurements Feedback Meas...mentioning

confidence: 99%

Section: Selected Signal Parametersmentioning

confidence: 99%

Section: Sinadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Overview of Signal Processing Problems in Power Electronic Control Circuits

Sozański

2023

Energies

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Low Cost PID Controller for Student Digital Control Laboratory Based on Arduino or STM32 Modules

Sozański

2023

Electronics

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In the teaching process, it is important that students do not carry out exercises only by computer simulations, but also that they carry out research in real time. In times of distance learning during the COVID-19 pandemic, it would be necessary to find a solution so that the students can perform such exercises individually at home. Therefore, it has become necessary to develop cheap and simple modules of digital controllers along with analog objects with adjustable order and time constants. This paper describes a low-cost proportional–integral–derivative (PID) controller for teaching students control techniques and analog control objects in real time. The PID controller is based on the cheap and widely available microcontroller modules Arduino or STM32. The advantage of this solution is that the algorithm of the digital PID controller is calculated every constant period of time. Both the solutions presented in the paper have been successfully tested by students in practice during remote learning during the COVID-19 pandemic.

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Improving the Efficiency of the Shunt Active Power Filter Acting with the Use of the Hysteresis Current Control Technique

Szromba

2023

Energies

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Calculation of the reference waveform for the compensating current generated by the shunt active power filter (ShAPF) can be carried out using various methods. In this article, this calculation is performed indirectly on the basis of tracking and processing of the ShAPF DC-link capacitor voltage. At the same time, the energy stored in this capacitor is used to generate the compensating current. Therefore, the operation of this capacitor during compensation, i.e., changes in energy stored in it and the voltage waveform on its terminals, is characteristic and crucial for the method considered. Once the current reference waveform is determined, it can be generated by ShAPF in various ways, but always using the energy stored in the DC-link capacitor. The power module of the active filter uses transistor switches to realize the required compensating current. During their operation, power losses occur that can be divided into either switching or conduction. The article shows that, in the case of the indirect control method and the hysteresis current control technique used, it is possible to reduce the operating frequency of the switches and the load on the DC-link capacitor. Thanks to this, it is possible to reduce power losses in these elements and extend their lifetime.

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Digital Signal Processing Circuits for Digital Class-D Power Amplifiers

Cited by 4 publications

References 21 publications

Overview of Signal Processing Problems in Power Electronic Control Circuits

Overview of Signal Processing Problems in Power Electronic Control Circuits

Low Cost PID Controller for Student Digital Control Laboratory Based on Arduino or STM32 Modules

Improving the Efficiency of the Shunt Active Power Filter Acting with the Use of the Hysteresis Current Control Technique

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