, 44:36 | Cite as

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

  • Soumitra DasEmail author
  • V S S Pavan Kumar Hari
  • Arun Kumar
  • G Narayanan


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.


Analytically derived closed-form expression bus-clamping pulse width modulation continual-clamp PWM discontinuous PWM harmonic analysis harmonic distortion split-clamp PWM pulsating torque voltage source inverter waveform quality 


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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of Electrical and Electronics EngineeringNational Institute of Technology GoaGoaIndia
  2. 2.Department of Energy Science and EngineeringIndian Institute of Technology BombayMumbaiIndia
  3. 3.MumbaiIndia
  4. 4.Department of Electrical EngineeringIndian Institute of ScienceBangaloreIndia

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