EPE Association: EPE 2007 - Subtopic 11-1 - LS: Inverter / Motor Control

EPE 2007 - Subtopic 11-1 - LS: Inverter / Motor Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 11: 'Adjustable speed drives' > EPE 2007 - Subtopic 11-1 - LS: Inverter / Motor Control

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   Field Oriented Control of IPM Drives for Optimal Constant Power Operation
By GUGLIELMI Paolo; PELLEGRINO Gianmario; ARMANDO Eric [View]
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Abstract: Interior Permanent Magnet (IPM) drives are particularly adapted to flux-weakening, then to constant power operation over a wide speed range. Most of the Space-Vector strategies for IPM drives are based on the control of the current vector. Flux-weakening is obtained by setting the $(d,q)$ current synchronous components according to the magnetic model of the motor. In case of variable dc-link, this strategy necessarily requires an additional voltage loop. The control of the flux vector, in a field-oriented frame, is proposed, in order to make the constant voltage operation easier in the the flux weakening range. A control algorithm, based on stator field-orientation, is described and tested on an IPM drive designed for EV traction. The full exploitation of the constant power range is obtained, also with a spread on the dc-link voltage. Discrete-time simulation and experimental results are presented.

   Medium voltage three level inverter for high speed applications
By JANNING JÃ¶rg; MERCIER Jean-Charles [View]
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Abstract: Key component of modern gas compressor systems in the megawatt range is the high speed induction motor fed by a medium voltage inverter. The high speed motor can be directly coupled with the compressor without needing a gearbox. This makes the compressor system more reliable and efficient. For the design of this drive system it is mandatory to follow the requirements of the high speed motor regarding harmonic distortions. The paper outlines the impact of harmonic distortions on the high speed motor. Different inverter topologies are discussed. The three-level NPC inverter with a reasonable output filter can be optimized to meet the motor requirements while also considering the constraints of the inverter. Different filter topologies combined with optimized pulse patterns are described and the harmonic distortions of the motor and the losses of the inverter are determined. The optimization shows that in many cases just an output choke in series to the motor is sufficient as a filter to meet the requirements, if the pulse pattern is optimized accordingly. Applying press pack IGBTs the three-level inverter is well fitting for the higher power range of gas compressor systems.

   Variable sampling period IM vector control for high performance medium voltage drive
By SIALA Sami; FLURY Guy; TERRIEN Franck [View]
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Abstract: This paper deals with the control of high performance Induction Machine vector control working with variable sampling period. In order to optimise the efficiency of a 6/8MW 3 level medium voltage inverter, used in Zendzimir mill steel (Zmill) applications, the PWM frequency is varied to minimise the switching losses. The experimental results on 6MW tension reel drive will be presented..

EPE 2007 - Subtopic 11-1 - LS: Inverter / Motor Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 11: 'Adjustable speed drives' > EPE 2007 - Subtopic 11-1 - LS: Inverter / Motor Control
	[return to parent folder]

	Field Oriented Control of IPM Drives for Optimal Constant Power Operation By GUGLIELMI Paolo; PELLEGRINO Gianmario; ARMANDO Eric	[View] [Download]
Abstract: Interior Permanent Magnet (IPM) drives are particularly adapted to flux-weakening, then to constant power operation over a wide speed range. Most of the Space-Vector strategies for IPM drives are based on the control of the current vector. Flux-weakening is obtained by setting the $(d,q)$ current synchronous components according to the magnetic model of the motor. In case of variable dc-link, this strategy necessarily requires an additional voltage loop. The control of the flux vector, in a field-oriented frame, is proposed, in order to make the constant voltage operation easier in the the flux weakening range. A control algorithm, based on stator field-orientation, is described and tested on an IPM drive designed for EV traction. The full exploitation of the constant power range is obtained, also with a spread on the dc-link voltage. Discrete-time simulation and experimental results are presented.

	Medium voltage three level inverter for high speed applications By JANNING JÃ¶rg; MERCIER Jean-Charles	[View] [Download]
Abstract: Key component of modern gas compressor systems in the megawatt range is the high speed induction motor fed by a medium voltage inverter. The high speed motor can be directly coupled with the compressor without needing a gearbox. This makes the compressor system more reliable and efficient. For the design of this drive system it is mandatory to follow the requirements of the high speed motor regarding harmonic distortions. The paper outlines the impact of harmonic distortions on the high speed motor. Different inverter topologies are discussed. The three-level NPC inverter with a reasonable output filter can be optimized to meet the motor requirements while also considering the constraints of the inverter. Different filter topologies combined with optimized pulse patterns are described and the harmonic distortions of the motor and the losses of the inverter are determined. The optimization shows that in many cases just an output choke in series to the motor is sufficient as a filter to meet the requirements, if the pulse pattern is optimized accordingly. Applying press pack IGBTs the three-level inverter is well fitting for the higher power range of gas compressor systems.

	Variable sampling period IM vector control for high performance medium voltage drive By SIALA Sami; FLURY Guy; TERRIEN Franck	[View] [Download]
Abstract: This paper deals with the control of high performance Induction Machine vector control working with variable sampling period. In order to optimise the efficiency of a 6/8MW 3 level medium voltage inverter, used in Zendzimir mill steel (Zmill) applications, the PWM frequency is varied to minimise the switching losses. The experimental results on 6MW tension reel drive will be presented..