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Analysis of generalized continual-clamp and split-clamp PWM schemes for induction motor drive

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Abstract

Continual-clamp pulse width modulation (CCPWM) clamps each phase of a three-phase inverter to one of the two dc buses continually for \(60^{\circ }\) duration in each half of the fundamental cycle. Split-clamp pulse width modulation (SCPWM) divides the \(60^{\circ }\) clamping interval into two sub-intervals, which are not necessarily equal, and falling in two different quarter cycles. Whether continual clamp or split clamp, the positioning of the clamping interval in case of CCPWM, and the ratio of splitting the clamping interval in SCPWM – all influence the waveform quality of the inverter output. This paper derives analytically closed-form expressions for the total RMS harmonic distortion factor and torque ripple factor pertaining to CCPWM with any arbitrary position of the clamping interval (i.e., generalized CCPWM) and also corresponding to SCPWM with any arbitrary ratio of splitting of the clamping interval (i.e., generalized SCPWM). The analytical results are well supported by experimental results on 3-hp and 5-hp induction motor drives.

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Authors and Affiliations

  1. Department of Electrical and Electronics Engineering, National Institute of Technology Goa, Goa, 403401, India

    Soumitra Das

  2. Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India

    V S S Pavan Kumar Hari

  3. 3rd floor, P’DMello Road, Wadibunder, Mumbai, 400010, India

    Arun Kumar

  4. Department of Electrical Engineering, Indian Institute of Science, Bangalore, 560012, India

    G Narayanan

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  1. Soumitra Das
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  2. V S S Pavan Kumar Hari
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  3. Arun Kumar
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  4. G Narayanan
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Correspondence to Soumitra Das.

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Das, S., Hari, V.S.S.P.K., Kumar, A. et al. Analysis of generalized continual-clamp and split-clamp PWM schemes for induction motor drive. Sādhanā 44, 36 (2019). https://doi.org/10.1007/s12046-018-1031-7

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  • DOI: https://doi.org/10.1007/s12046-018-1031-7

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