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Digitally controlled sigma-delta modulated direct matrix converter for high frequency AC-AC Conversion

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Title Digitally controlled sigma-delta modulated direct matrix converter for high frequency AC-AC Conversion
 
Creator Khan, Irfan Ahmad
Agarwal, Anshul
 
Subject Direct matrix converter
Field programmable gate arrays
Modulation techniques
Pulse width modulation
Sigma-delta modulation
Total harmonic distortion
 
Description 927-933
In recent times, several digitally controlled modulation techniques (MTs) have envisioned for generating pulse width modulation (PWM) trigger pulses to improve the quality of the output (o/p) produced [in terms of reduced total harmonic distortion (THD)], from direct matrix converter (DMC). The development of a digital controller for single-phase DMC, producing o/p frequencies higher than the input frequency has been dealt with in this paper. Performance of the proposed DMC has been analysed by applying an advanced modulation technique, named as “Sigma-Delta modulation”. The complete system has been simulated on the MATLAB/SIMULINK platform as well as successfully implemented on the real-time digital simulator “OPAL-RT: OP4510”. Working of the proposed digital controller has been successfully verified for the DMC with o/p frequency, ranging from 100 Hz to 60 kHz. With the Sigma-Delta modulated trigger pulses, the lowest THD (associated with o/p voltage of the DMC) is found to be around 3.1 %. As the real-time results have been acquired in the close vicinity and conformity to the results achieved with simulations, this validates success of the proposed digital controller.
 
Date 2020-11-24T08:19:45Z
2020-11-24T08:19:45Z
2020-08
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/55673
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJEMS Vol.27(4) [August 2020]