EPE Association: EPE 2013 - LS8e: Electrical Machines

EPE 2013 - LS8e: Electrical Machines
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 10: Electrical machines > EPE 2013 - LS8e: Electrical Machines

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   Analysis of a Four-Phase Induction Machine with Direct Torque Control
By Julio VIOLA, Flavio QUIZHPI, Juan PESANTEZ, Marco SANCHEZ [View]
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Abstract: In this work the design and control of a four-phase induction machine (4P-IM) is addressed. The 4PIMis controlled using a four-phase voltage source inverter (4P-VSI) with a generalization of the classicdirect torque control (DTC) scheme. An analysis of the available valid switching states and voltage spacevectors is developed and a switching table is obtained. Finally, the system’s fault tolerant characteristicsare briefly considered for operation with gate suppression in one IGBT. In this case, operation is stillpossible with the use of switching strategy that employs the remaining space vectors available during thefault.

   Torque Maximization of A High-Speed SwitchedReluctance Starter in Acceleration test
By Minh Dinh BUI [View]
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Abstract: This paper presents a torque maximization control strategy of a high speed switched reluctance machineand describes an indirect torque measurement based on acceleration. The SRM operates as aStarter/Generator for a more electric aircraft application with the requirement of an average torque of atleast 15 Nm up to a speed of 27,000 rpm, which must be available for 15 s according to [4]. Maximumtorque acceleration is intended to be used to start up the turbine to idle speed. The acceleration methodwas used to validate the torque-speed characteristic in the described starting mode. Both in high accelerationand high speed systems, a direct torque measurement would be a big challenge because of thedelay time of the torque sensor. Therefore, the torque was measured indirectly by analyzing the accelerationaccording to the speed rise. In order to achieve numerically stable results, an additional inertia wasprovided.

   Verification of Parallel Connected Multiple Motor Drive System with Numbers of Permanent Magnet Synchronous Motors
By Tsuyoshi NAGANO, Teck Chaing GOH, Jun-ichi ITOH, Koji KATO [View]
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Abstract: This paper discusses a multi-parallel drive system for permanent magnet synchronous motors PMSMs). This system proposes to use two different functions of inverter, a main inverter with V/f control to control the speed of all parallel connected PMSMs. Then, each of PMSM is individually connected with an auxiliary inverter. The auxiliary windings which are used in the auxiliary inverter are placed in the slots together with the conventional windings. In addition, implementation of the damping control in the auxiliary inverter is discussed and the stability analysis is evaluated in order to suppress the speed and torque vibrations which are caused from the resonance between the inertia moment and the synchronous reactance. The simulation and experimental results demonstrate the effectiveness of the proposed system. Moreover, the relationship between the damping gain and the output power of the auxiliary inverter is clarified. From the results, it can be confirmed that if the application that is required a slow response is applied in the auxiliary inverter, then the power capacity of the auxiliary inverter can achieve the smallest which is equivalent to 10\% of the main inverter power capacity.

EPE 2013 - LS8e: Electrical Machines
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 10: Electrical machines > EPE 2013 - LS8e: Electrical Machines
	[return to parent folder]

	Analysis of a Four-Phase Induction Machine with Direct Torque Control By Julio VIOLA, Flavio QUIZHPI, Juan PESANTEZ, Marco SANCHEZ	[View] [Download]
Abstract: In this work the design and control of a four-phase induction machine (4P-IM) is addressed. The 4PIMis controlled using a four-phase voltage source inverter (4P-VSI) with a generalization of the classicdirect torque control (DTC) scheme. An analysis of the available valid switching states and voltage spacevectors is developed and a switching table is obtained. Finally, the system’s fault tolerant characteristicsare briefly considered for operation with gate suppression in one IGBT. In this case, operation is stillpossible with the use of switching strategy that employs the remaining space vectors available during thefault.

	Torque Maximization of A High-Speed SwitchedReluctance Starter in Acceleration test By Minh Dinh BUI	[View] [Download]
Abstract: This paper presents a torque maximization control strategy of a high speed switched reluctance machineand describes an indirect torque measurement based on acceleration. The SRM operates as aStarter/Generator for a more electric aircraft application with the requirement of an average torque of atleast 15 Nm up to a speed of 27,000 rpm, which must be available for 15 s according to [4]. Maximumtorque acceleration is intended to be used to start up the turbine to idle speed. The acceleration methodwas used to validate the torque-speed characteristic in the described starting mode. Both in high accelerationand high speed systems, a direct torque measurement would be a big challenge because of thedelay time of the torque sensor. Therefore, the torque was measured indirectly by analyzing the accelerationaccording to the speed rise. In order to achieve numerically stable results, an additional inertia wasprovided.

	Verification of Parallel Connected Multiple Motor Drive System with Numbers of Permanent Magnet Synchronous Motors By Tsuyoshi NAGANO, Teck Chaing GOH, Jun-ichi ITOH, Koji KATO	[View] [Download]
Abstract: This paper discusses a multi-parallel drive system for permanent magnet synchronous motors PMSMs). This system proposes to use two different functions of inverter, a main inverter with V/f control to control the speed of all parallel connected PMSMs. Then, each of PMSM is individually connected with an auxiliary inverter. The auxiliary windings which are used in the auxiliary inverter are placed in the slots together with the conventional windings. In addition, implementation of the damping control in the auxiliary inverter is discussed and the stability analysis is evaluated in order to suppress the speed and torque vibrations which are caused from the resonance between the inertia moment and the synchronous reactance. The simulation and experimental results demonstrate the effectiveness of the proposed system. Moreover, the relationship between the damping gain and the output power of the auxiliary inverter is clarified. From the results, it can be confirmed that if the application that is required a slow response is applied in the auxiliary inverter, then the power capacity of the auxiliary inverter can achieve the smallest which is equivalent to 10\% of the main inverter power capacity.