{"references": ["BELASSEL M-T. \"The effect of the Thickness of Electrical sheet on\nOvervoltage in the Asynchronous Motors Fed byPWM- converters\",\nWaset, ISSUE 73. JANUARY 2011, pp.668.", "M.T Belassel and V.YA Bespalov. . \"High-frequency parameters and\nvoltage surges between the whorls of flexible winding to several\nwinding of induction motors,fed by PMW\",Electrotechnika., no.7,\n2008, pp. 14-17.", "M.T Belassel and V.YA Bespalov. \"High-frequency parameters and\nvoltage surges in different types windings of induction motors fed by\nPWM\", Electrotekhnika., no. 3, 2006, pp. 56-63.", "M.T Belassel., Bespalov V.YA. and Chetate Boukhemis. \"Capacitive\nparameters and voltage surges in the winding of an asynchronous motor\nwith power supply from a PWM- converter\", Electrotekhnika. no .1,\n2005, pp. 44-48,.", "M.T. BELASSEL. \"Calculation of over voltages in the Asynchronous\nMotors Supplied with Frequency converters of the type Modulation of\nImpulsion Breadth (PWM)\", 16 th International Conference on the\nComputation of Electromagnetic Fields \u00abCompumag 2007\u00bb June 24-28,\n2007 Aachen, Germany.", "Boukhemis Chetate, Mohand-Tahar Belassel, St\u00e9phane Simard and\nRachid Beguenane, \"Influence of Overvoltages in Induction Motors fed\nby PWM voltage inverters on Power efficiency\", Electrical Power\nConference, 2007. EPC 2007. IEEE Canada Number: 10052327, pp.\n399-404.", "Kaganov Z.G. \"Electrical circuit with distributed parameters and chain\ncircuits\", Energoatomizdat, Moscow, 1990.", "Vataev A.C. \"High frequency electromagnetic process and overvoltages\nin the squirrel cage induction motors, supplied with the frequency\nconverters\", PHD, Saint Petersburg, 2009, Russia."]}

This work is devoted to the calculation of the undulatory parameters and the study of the influence of te number parallel path of a winding on overvoltage compared to the frame and between turns (sections) in a multiturn random winding of an asynchronous motors supplied with PWM- converters.