EPE Association: EPE 1997 – 37: Dialogue Session DS5f-2: CONVERTER MACHINE INTERACTIONS: HARMONICS

EPE 1997 – 37: Dialogue Session DS5f-2: CONVERTER MACHINE INTERACTIONS: HARMONICS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 37: Dialogue Session DS5f-2: CONVERTER MACHINE INTERACTIONS: HARMONICS

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   ASYMMETRICAL OPERATION OF A VOLTAGE-INVERTER-FED INDUCTION MACHINE
By S.G. Bosga; J.J.A. v.d. Burgt; A.J.A. Vandenput [View]
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Abstract: In normal conditions, the six power switches of a voltage-source inverter are commanded in a symmetrical way. If, due to a fault, one of the switches, eg. an IGBT, refuses to conduct, an induction machine connected to tlus inverter will- without special measures- exhibit" under most conditions a very deteriorated operation. Using a special control strategy, the behaviour of the drive can be improved considerably, so tl1at continued operation of the drive might be possible. Simulations and experiments show the feasibility of such a control, but also its limitations.

   A TORQUE-RIPPLE IN INVERTER-FED MULTIMOTOR DRIVE
By Zbigniew Nowacki [View]
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Abstract: An induction motor driven by a non-sinusoidal PWM voltage generates torqueripple. In multimotor drive with common shaft operation the particular torque-ripples sum up by "stiff' mechanical coupling between machines. An influence of control of the particular inverter on the resultant torque-ripple is investigated. The resultant torque-ripple for two inverter-fed motors for differently situated modulating signals and carrier signals are produced.

   HARMONIC EFFECTS BETWEEN A PWM INVERTER AND AN AC MACHINE
By Alain GROUD; Laurent GERBAUD; Jean-Pierre ROGNON; James ROUDET [View]
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Abstract: In an electrical drive, each power element is disturbed by the harmonics produced by the others. The general behavior of the drive is affected. With an adapted computation method, the voltage and currents spectra are calculated to analyze the coupling effects in different cases.

   THE ADDITIONAL PHENOMENA WHICH APPEAR IN INDUCTION MOTORS FED FROM PWM INVERTERS
By Zdzislaw Krzemien [View]
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Abstract: In induction motors supplied from PWM invertersrters appear additional phenomena which do not arise in normal supply from mains. These phenomena are: induced voltage at frame of insulated motors; earth currents in grounded motors; shaft voltages; bearing currents. Trondheim These phenomena are caused by following reasons: existance of capacitance from stator windings to the rotor end stator iron and change of values of common mode voltages in motor windings. In the paper is present analysis of these phenomena and results of the researchs.

EPE 1997 – 37: Dialogue Session DS5f-2: CONVERTER MACHINE INTERACTIONS: HARMONICS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 37: Dialogue Session DS5f-2: CONVERTER MACHINE INTERACTIONS: HARMONICS
	[return to parent folder]

	ASYMMETRICAL OPERATION OF A VOLTAGE-INVERTER-FED INDUCTION MACHINE By S.G. Bosga; J.J.A. v.d. Burgt; A.J.A. Vandenput	[View] [Download]
Abstract: In normal conditions, the six power switches of a voltage-source inverter are commanded in a symmetrical way. If, due to a fault, one of the switches, eg. an IGBT, refuses to conduct, an induction machine connected to tlus inverter will- without special measures- exhibit" under most conditions a very deteriorated operation. Using a special control strategy, the behaviour of the drive can be improved considerably, so tl1at continued operation of the drive might be possible. Simulations and experiments show the feasibility of such a control, but also its limitations.

	A TORQUE-RIPPLE IN INVERTER-FED MULTIMOTOR DRIVE By Zbigniew Nowacki	[View] [Download]
Abstract: An induction motor driven by a non-sinusoidal PWM voltage generates torqueripple. In multimotor drive with common shaft operation the particular torque-ripples sum up by "stiff' mechanical coupling between machines. An influence of control of the particular inverter on the resultant torque-ripple is investigated. The resultant torque-ripple for two inverter-fed motors for differently situated modulating signals and carrier signals are produced.

	HARMONIC EFFECTS BETWEEN A PWM INVERTER AND AN AC MACHINE By Alain GROUD; Laurent GERBAUD; Jean-Pierre ROGNON; James ROUDET	[View] [Download]
Abstract: In an electrical drive, each power element is disturbed by the harmonics produced by the others. The general behavior of the drive is affected. With an adapted computation method, the voltage and currents spectra are calculated to analyze the coupling effects in different cases.

	THE ADDITIONAL PHENOMENA WHICH APPEAR IN INDUCTION MOTORS FED FROM PWM INVERTERS By Zdzislaw Krzemien	[View] [Download]
Abstract: In induction motors supplied from PWM invertersrters appear additional phenomena which do not arise in normal supply from mains. These phenomena are: induced voltage at frame of insulated motors; earth currents in grounded motors; shaft voltages; bearing currents. Trondheim These phenomena are caused by following reasons: existance of capacitance from stator windings to the rotor end stator iron and change of values of common mode voltages in motor windings. In the paper is present analysis of these phenomena and results of the researchs.