EPE Association: EPE 2009 - Subtopic 12-1 - LS: 'Control of High Performance Motor Drives'

EPE 2009 - Subtopic 12-1 - LS: 'Control of High Performance Motor Drives'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 12: 'High Performance Drives' > EPE 2009 - Subtopic 12-1 - LS: 'Control of High Performance Motor Drives'

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   A NEW SENSORLESS PERMANENT MAGNET SYNCHRONOUS MOTOR ALGORITHM BASED ON ALGEBRAIC METHOD
By Mario MARCHESONI, Matteo CARPANETO, Gianmarco MARAGLIANO, Luis VACCARO [View]
[Download]

Abstract: In this paper, a new algorithm for position and speed estimation in permanent magnet synchronous motors is presented, which is based on the high frequency permanent motor model and on high frequency signal injection, uses an algebraic approach and is aimed to low speed range applications. High frequency injection allows, by means of simple mathematical relationships, the estimation of motor characteristic inductances. The machine inductances are characterized by a certain degree of position dependent magnetic saliency, as a function of the shaft position, in particular the mutual inductance value, which is proportional to the error between the true angle and an estimated angle value. The angle error is utilized as error signal, in a phase locked loop technique, in order to track the motor position and speed. Simulation and experimental results are presented which confirm the validity of the proposed solution.

   Low Speed Sensorless Control of an Induction Motor Fed by Multilevel Converter to Reduce Current Distortion
By KAMEL SALEH, Mark SUMNER, Greg ASHER, Qiang GAO, MATTEO TOMASINI [View]
[Download]

Abstract: The paper introduces a new scheme to track the rotor position of an induction motor. The scheme uses the measurement of current derivatives during null switching vectors of a standard PWM scheme and reduces the minimum pulse widths required to allow high frequency switching oscillations to die down. The motor current distortion is therefore also reduced. The method uses H-Bridges connected in series with the main converter. This configuration has the same characteristics as the multilevel converters proposed for high power induction motor drives. The H-Bridges can be used to produce low voltage test vectors during the null vector which can provide a good rotor position estimation with very low additional current distortion. The paper will present experimental results which show the potential capability for sensorless speed control.

   Sensorless Control of Induction Motor Drives in the Zero Frequency Speed Range
By Heiko ZATOCIL [View]
[Download]

Abstract: An estimation method for sensorless control employing a test signal based reference model is presented. The method estimates the slip frequency by a comparison of the measured impedance curve while the machine is in operation with the reference model curves. The reference model is measured during DC magnetisation of a cold machine at steady state and constant rotor flux linkage. During normal machine operation the machine temperature and the stator frequency differ from these conditions and thus have a negative influence on quality of the estimation. The impact of these disturbances is investigated and two compensation strategies are presented. Measurements on two different standard induction machines which are not especially designed for sensorless control show that the estimation method allow safe operation at standstill and even at zero frequency.

EPE 2009 - Subtopic 12-1 - LS: 'Control of High Performance Motor Drives'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 12: 'High Performance Drives' > EPE 2009 - Subtopic 12-1 - LS: 'Control of High Performance Motor Drives'
	[return to parent folder]

	A NEW SENSORLESS PERMANENT MAGNET SYNCHRONOUS MOTOR ALGORITHM BASED ON ALGEBRAIC METHOD By Mario MARCHESONI, Matteo CARPANETO, Gianmarco MARAGLIANO, Luis VACCARO	[View] [Download]
Abstract: In this paper, a new algorithm for position and speed estimation in permanent magnet synchronous motors is presented, which is based on the high frequency permanent motor model and on high frequency signal injection, uses an algebraic approach and is aimed to low speed range applications. High frequency injection allows, by means of simple mathematical relationships, the estimation of motor characteristic inductances. The machine inductances are characterized by a certain degree of position dependent magnetic saliency, as a function of the shaft position, in particular the mutual inductance value, which is proportional to the error between the true angle and an estimated angle value. The angle error is utilized as error signal, in a phase locked loop technique, in order to track the motor position and speed. Simulation and experimental results are presented which confirm the validity of the proposed solution.

	Low Speed Sensorless Control of an Induction Motor Fed by Multilevel Converter to Reduce Current Distortion By KAMEL SALEH, Mark SUMNER, Greg ASHER, Qiang GAO, MATTEO TOMASINI	[View] [Download]
Abstract: The paper introduces a new scheme to track the rotor position of an induction motor. The scheme uses the measurement of current derivatives during null switching vectors of a standard PWM scheme and reduces the minimum pulse widths required to allow high frequency switching oscillations to die down. The motor current distortion is therefore also reduced. The method uses H-Bridges connected in series with the main converter. This configuration has the same characteristics as the multilevel converters proposed for high power induction motor drives. The H-Bridges can be used to produce low voltage test vectors during the null vector which can provide a good rotor position estimation with very low additional current distortion. The paper will present experimental results which show the potential capability for sensorless speed control.

	Sensorless Control of Induction Motor Drives in the Zero Frequency Speed Range By Heiko ZATOCIL	[View] [Download]
Abstract: An estimation method for sensorless control employing a test signal based reference model is presented. The method estimates the slip frequency by a comparison of the measured impedance curve while the machine is in operation with the reference model curves. The reference model is measured during DC magnetisation of a cold machine at steady state and constant rotor flux linkage. During normal machine operation the machine temperature and the stator frequency differ from these conditions and thus have a negative influence on quality of the estimation. The impact of these disturbances is investigated and two compensation strategies are presented. Measurements on two different standard induction machines which are not especially designed for sensorless control show that the estimation method allow safe operation at standstill and even at zero frequency.