Simple multilevel inverter-based induction motor drive scheme using sigma–delta converter with space-vector quantiser

Jacob, Biji; Baiju, M. R.

doi:10.1049/iet-pel.2012.0047

Cited by 20 publications

(13 citation statements)

References 44 publications

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“…The inverters are switched according to instantaneous 2-level Modulated signal and corresponding subhexagon centre [33]. It is used to drive a 2 HP three phase induction motor with V/f control for different modulation indices covering different speed ranges.…”

Section: Resultsmentioning

confidence: 99%

Harmonic Noise Reduction in Three-level Inverter using Space Vector based Dithered Sigma Delta Modulator

Jacob¹,

Baiju²

2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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Inverters using deterministic switching schemes produce switching noises concentrated on the harmonic frequencies.To suppress the harmonic spikes in three phase three-level voltage source inverters, a Space Vector based Dithered Sigma Delta modulation scheme is proposed in this paper. In the proposed scheme the instantaneous reference voltage space vector is synthesized by dithered sigma delta analog-todigital converter. The spurious harmonic spikes at the output of the Sigma Delta Modulator with regular input are eliminated by introducing a dithered sequence in the Dithered Sigma Delta Modulator. The switching frequency of dithered sigma delta converter varies randomly resulting in the spreading of power spectrum of the inverter. The minimum pulse width of the output pulse train is the sampling time period, which prevents the inverter from missing switching operations. In the present work, the quantizer in the sigma delta converter uses the principle of Vector Quantization instead of conventional scalar quantizer. In this study the space vectors are represented in the 60° coordinate system to reduce the computational complexity compared to the conventional Cartesian coordinate system. Experimental results of proposed scheme are compared with Space Vector based Sigma Delta Modulator, SVPWM scheme and Random PWM scheme.

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Section: Resultsmentioning

confidence: 99%

Harmonic Noise Reduction in Three-level Inverter using Space Vector based Dithered Sigma Delta Modulator

Jacob¹,

Baiju²

2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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“…The space vector based dithered sigma delta ADC is used in two-level inverter to suppress the spurious harmonics [24]. The switching scheme of SDM based multilevel inverter is simplified by mapping the voltage space reference vector into the two-level inverter space vector plane [16,17]. In the present work the principle of space vector based DSDM in [24] is extended to multilevel inverters after mapping the reference space vector to two-level inverter vector space.…”

Section: Introductionmentioning

confidence: 99%

“…For encoding voltage space reference vector, the Space Vector Quantizer is implemented in the Dithered sigma delta ADC [15 -17]. The switching vectors generated in space vector based dithered sigma delta converter corresponding to two-level inverter are then translated back to the original multilevel inverter to obtain the actual switching vectors in multilevel inverter [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…For the representation of space vector, the 0 60 coordinate system is used in this paper. The position of the reference voltage space vector located anywhere in the threelevel space vector diagram can be mapped to center 2-level subhexagon [16,17]. The mapping can be done by subtracting the vector value of the selected subhexagon centre, containing the tip of the reference vector, from the original reference voltage space vector.…”

Section: Introductionmentioning

confidence: 99%

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Space-Vector-Quantized Dithered Sigma–Delta Modulator for Reducing the Harmonic Noise in Multilevel Converters

Jacob¹,

Baiju²

2015

IEEE Trans. Ind. Electron.

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Power converters using deterministic switching frequency schemes have switching noises concentrated at the harmonic frequencies, resulting in enhanced electromagnetic emission. To suppress the harmonic spikes in three phase multilevel voltage source converters, a digital control scheme based on Dithered Sigma Delta modulation is proposed in this paper. Introducing a dithered sequence in the Sigma Delta Modulator varies switching frequency randomly, resulting in the suppression of the spurious harmonic spikes in output spectrum even with regular control input. Even though the switching frequency varies randomly, the minimum pulse width of the proposed scheme is the sampling time period, avoiding the minimum pulse width problem. Instead of conventional scalar quantizer, the quantizer in the proposed dithered sigma delta converter uses the principle of Space Vector Quantization. The proposed scheme is verified experimentally on constant v/f openloop induction motor drive for three-level inverter realized by cascading two two-level inverters. The performance of the proposed scheme is compared with different Pulse Width Modulation schemes in entire modulation index including overmodulation region. ). M. R. Baiju is with College of Engineering, Trivandrum. (mrbaiju@ieee.org).0278-0046 (c)

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“…It is an analogue to digital conversion method which presents a simple way of encoding and decoding voice and video messages over different communication links. The modulation technique can also be used in inverter applications to produce the PWM signals required to control the power electronic inverters supplying power to electrical machines [54], [55]. The delta modulator uses an integrator as a low pass filter which produces an estimate of the modulating signal in the same way that a delta modulation receiver operates in communication systems.…”

Section: Introductionmentioning

confidence: 99%

Brush-DC equivalent control based delta modulation for a PWM inverter-fed nine phase induction machine drive

Gunda

Gule

2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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Simple multilevel inverter-based induction motor drive scheme using sigma–delta converter with space-vector quantiser

Cited by 20 publications

References 44 publications

Harmonic Noise Reduction in Three-level Inverter using Space Vector based Dithered Sigma Delta Modulator

Harmonic Noise Reduction in Three-level Inverter using Space Vector based Dithered Sigma Delta Modulator

Space-Vector-Quantized Dithered Sigma–Delta Modulator for Reducing the Harmonic Noise in Multilevel Converters

Brush-DC equivalent control based delta modulation for a PWM inverter-fed nine phase induction machine drive

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