Performance Analysis of Delta Modulated PWM Inverters

Rahman, M.A.; Quaicoe, John E.; Choudhury, M. A.

doi:10.1109/tpel.1987.4766363

Cited by 91 publications

(12 citation statements)

References 3 publications

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“…The comparator determines this error signal to produce the modulated wave in such manner that error is minimized and kept between certain levels. The closed loop arrangement of the delta-modulator ensures that the polarity of the pulses are adjusted by the sign of error signal which causes the local decoded waveform to track the input signal I a (t) [5]. Initially, when I a (t) < I a (t), the fi rst impulse has a weight of +h, when the impulse is feedback and integrated, it produces a stepwise change in Ia (t) of height h. This process continues through the startup interval until I a (t) exceeds I a (t) and causes a negative impulse.…”

Section: Analysis Of Delta Modulatormentioning

confidence: 99%

Novel delta-sigma modulator for DC-AC converter applications-an experimental evaluation

Mohapatra

Babu

Panda

2011

International Conference on Sustainable Energy and Intelligent Systems (SEISCON 2011)

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This paper presents a comparative study between two current control techniques, namely, a basic delta modulator and novel deltasigma modulator. The delta modulator is used widely in induction motor drives as a known method for converting analog signal in to digital form; to optimize (harmonic minimization) pulse width modulated (PWM) inverter waveforms on-line without conventional optimization processes, like selective harmonic elimination or harmonic weighting techniques. The quantization noise arises from the A/D conversion is distributed uniformly to the frequency axis. But in the delta-sigma modulator the noise varies. It provides several advantageous over Delta modulation. It can be successfully applied to over-sampling digital-to-analog and analog-to-digital data converters switch mode power supplies and switch mode inverters. The spread spectrum nature of delta-sigma modulator, noise level within unnecessary band is much reduced. It is relatively easy to implement, smooth inverter operation and provides low harmonics at the inverter output. The comparative study between delta and delta-sigma current controllers has been verifi ed by the simulation undertaken by the MATLAB/SIMULINK environment in terms of the high switching frequency power spectra density, average switching frequency, rms current error and total harmonic distortion of load current waveforms. The obtained theoretical results are validated with experimental platform based on TMS320F2812 digital signal processor for effectiveness of the study.

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Section: Analysis Of Delta Modulatormentioning

confidence: 99%

Novel delta-sigma modulator for DC-AC converter applications-an experimental evaluation

Mohapatra

Babu

Panda

2011

International Conference on Sustainable Energy and Intelligent Systems (SEISCON 2011)

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“…Also, the time constant of the integrator affect the switching frequency, too. Equation (14) can be used to determine the appropriate hysteresis voltage band, ΔV, under the desired switching frequency. …”

Section: Hysteresis Voltage Band δVmentioning

confidence: 99%

An improved delta modulation technique for DC-DC buck converters

Chen¹,

Chen

et al. 2008

2008 IEEE International Conference on Sustainable Energy Technologies

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The objective of this paper is to propose an improved delta modulation (IDM) control scheme for DC-DC buck converters. The proposed IDM has various slope of carrier signal by feed forward the input control signal into the integrator of the delta modulator. It can overcome the drawback of the conventional delta modulation (CDM), which can not be applied to DC-DC converters. In this paper, the operation principle of the proposed IDM is introduced. The effect of the circuit parameter variation to the converter performance is presented, too. Finally, both the computer simulation and experimental results show that the proposed IDM control scheme can achieve very stable output voltages with fast transient response.

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“…Various modulation techniques employed to improve the quality of the output voltage of matrix converters include sinusoidal PWM [9], space vector PWM [10], [11] and delta modulation [12], [13]. Delta modulation offers a number of advantages such as a simple electronic circuitry without external feedback from a high power circuit, inherent constant volts per hertz control for a preset frequency range, smooth transitions between the constant volt per hertz and the constant volts modes of operation, severe attenuation of the low order harmonics, low communication rates for high modulation signals and guaranteed on/off time for the switches [14].…”

Section: Introductionmentioning

confidence: 99%

Design of an FPGA Based Controller for Delta Modulated Single-Phase Matrix Converters

Agarwal¹,

Agarwal²

2012

Journal of Power Electronics

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A FPGA based delta modulated single phase matrix converter has been developed that may be used in both cyclo-converters and cyclo-inverters. This converter is ideal for variable speed electrical drives, induction heating, fluorescent lighting, ballasts and high frequency power supplies. The peripheral input-output and FPGA interfacing have been developed through Xilinx 9.2i, to generate delta modulated trigger pulses for the converter. The controller has been relieved of the time consuming computational task of PWM signal generation by implementing the method of trigger pulse generation in a FPGA by using Hardware Description Language VHDL in Xilinx. The trigger circuit has been tested qualitatively by observing various waveforms on an oscilloscope. The operation of the proposed system has been found to be satisfactory.

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Performance Analysis of Delta Modulated PWM Inverters

Cited by 91 publications

References 3 publications

Novel delta-sigma modulator for DC-AC converter applications-an experimental evaluation

Novel delta-sigma modulator for DC-AC converter applications-an experimental evaluation

An improved delta modulation technique for DC-DC buck converters

Design of an FPGA Based Controller for Delta Modulated Single-Phase Matrix Converters

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