EPE Association: EPE 2007 - Subtopic 17-1 - LS: Operating quality of systems

EPE 2007 - Subtopic 17-1 - LS: Operating quality of systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 17: 'Operating quality of systems' > EPE 2007 - Subtopic 17-1 - LS: Operating quality of systems

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   Predicting the influence of placement of passive components on EMI behaviour
By HOENE Eckart; LISSNER Andre [View]
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Abstract: The EMI behavior of power electronic systems is severely influenced by the placement of passive components. Particularly filter components are affected by magnetic field coupling reducing filter performance. This contribution demonstrates the urgent demand for a method predicting EMI behavior on a typical power electronic system. The method comprises a combination of circuit and field simulation. Therefore investigations on stray fields of passive components had to be carried out, which enable the derivation of placement rules and furthermore an automated placement. Using the proposed method in the design stage reduces development costs and allows a statement on achievable performance with selected components.

   Noise propagation path identification of variable speed drive in time domain via common mode test mode
By ZHAO D.; ROC'H A.; FERREIRA J.A.; POLINDER H.; LEFERINK F.B.J. [View]
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Abstract: Electromagnetic Compatibility (EMC) debugging of power electronics systems depends heavily on the experience of specialists due to the complex mechanisms of electromagnetic noise. In this paper, the time domain approach is used instead of the conventional frequency domain method to identify noise propagation path. The proposed test mode switches the upper or lower transistors of the converter legs simultaneously on and off at a 50\% fixed duty ratio. It is called common mode test mode. Because there is no significant functional current flowing, the differential mode noise is minimized and the remaining common mode noise and mixed mode noise are maximized. Therefore, the common mode noise in this test method gives its upper boundary of Electromagnetic Interference (EMI) level when the system is normal operated. A motor drive system is measured to show how this test mode works.

   Diagnosis of rotor faults in direct and indirect FOC induction motor drives
By CARDOSO AntÃ³nio; CRUZ SÃ©rgio [View]
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Abstract: This paper is devoted to the diagnosis of rotor faults in direct and indirect rotor flux oriented controlled drives. Different diagnostic techniques are proposed and analyzed with this aim, putting in evidence the advantages and limitations of each one. It is demonstrated that depending on the structure of the control system, some diagnostic techniques may be applicable or not for the diagnosis of this type of fault. The estimated rotor flux and the reference value of the magnetizing current component are the variables which demonstrate higher potential to be used for diagnostic purposes. At the end, the possibility of diagnosing the fault not only when the drive is operating in steady-state but also in transient conditions is investigated.

EPE 2007 - Subtopic 17-1 - LS: Operating quality of systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 17: 'Operating quality of systems' > EPE 2007 - Subtopic 17-1 - LS: Operating quality of systems
	[return to parent folder]

	Predicting the influence of placement of passive components on EMI behaviour By HOENE Eckart; LISSNER Andre	[View] [Download]
Abstract: The EMI behavior of power electronic systems is severely influenced by the placement of passive components. Particularly filter components are affected by magnetic field coupling reducing filter performance. This contribution demonstrates the urgent demand for a method predicting EMI behavior on a typical power electronic system. The method comprises a combination of circuit and field simulation. Therefore investigations on stray fields of passive components had to be carried out, which enable the derivation of placement rules and furthermore an automated placement. Using the proposed method in the design stage reduces development costs and allows a statement on achievable performance with selected components.

	Noise propagation path identification of variable speed drive in time domain via common mode test mode By ZHAO D.; ROC'H A.; FERREIRA J.A.; POLINDER H.; LEFERINK F.B.J.	[View] [Download]
Abstract: Electromagnetic Compatibility (EMC) debugging of power electronics systems depends heavily on the experience of specialists due to the complex mechanisms of electromagnetic noise. In this paper, the time domain approach is used instead of the conventional frequency domain method to identify noise propagation path. The proposed test mode switches the upper or lower transistors of the converter legs simultaneously on and off at a 50\% fixed duty ratio. It is called common mode test mode. Because there is no significant functional current flowing, the differential mode noise is minimized and the remaining common mode noise and mixed mode noise are maximized. Therefore, the common mode noise in this test method gives its upper boundary of Electromagnetic Interference (EMI) level when the system is normal operated. A motor drive system is measured to show how this test mode works.

	Diagnosis of rotor faults in direct and indirect FOC induction motor drives By CARDOSO AntÃ³nio; CRUZ SÃ©rgio	[View] [Download]
Abstract: This paper is devoted to the diagnosis of rotor faults in direct and indirect rotor flux oriented controlled drives. Different diagnostic techniques are proposed and analyzed with this aim, putting in evidence the advantages and limitations of each one. It is demonstrated that depending on the structure of the control system, some diagnostic techniques may be applicable or not for the diagnosis of this type of fault. The estimated rotor flux and the reference value of the magnetizing current component are the variables which demonstrate higher potential to be used for diagnostic purposes. At the end, the possibility of diagnosing the fault not only when the drive is operating in steady-state but also in transient conditions is investigated.