EPE Association: EPE 2013 - LS2g: Advanced Drive Control and Sensorless Techniques

EPE 2013 - LS2g: Advanced Drive Control and Sensorless Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 12: High performance drives > EPE 2013 - LS2g: Advanced Drive Control and Sensorless Techniques

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   A Torque Ripple Reduction Method by Current Sensor Offset Error Compensation
By Hiroshi TAMURA, Toshiyuki AJIMA, Yasuo NOTO [View]
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Abstract: This paper presents a reduction method for a torque ripple resulting from a motor phase current sensor offset error for motor drive applications such as a hybrid electric vehicle (HEV). The proposed method compensates for the detected motor phase current offset error by subtracting the detected motor phase current offset error value indirectly estimated using the inverter offset voltage reference value from the detected motor phase current value after the offset component of the inverter output voltage reference is calculated by a discrete Fourier transform and a digital low pass filter. The main feature of the proposed method is its ability to compensate for the detected motor phase current offset error that varies during inverter-motor drive. In this paper, the effectiveness of the proposed method with the motor torque analysis is discussed in detail. In the condition of the torque reference from 10[Nm] to 100[Nm] and the motor rotation speed of 1000[rpm], the average value of the torque ripple with the proposed method is 10[Nm] and is reduced by one-second (1/2) compared with the average value of the torque ripple without the proposed method.

   Carrier signal based sensorless control of electrically excited synchronous machines at standstill and low speed using the rotor winding as a receiver
By Alexander RAMBETIUS, Bernhard PIEPENBREIER, Markus SEILMEIER, Sebastian EBERSBERGER [View]
[Download]

Abstract: This paper presents a new carrier signal based approach for motion sensorless control of electricallyexcited synchronous machines. In the case of permanent magnet synchronous machines sensorlesscontrol at standstill and low speed is mostly done by injecting a high-frequency voltage and evaluatingthe resulting current response. Hence, the stator is used as the transmitter and as the receiver of thecarrier signal. The major drawback is that a magnetic saliency is mandatory. In the case of electricallyexcited synchronous machines the rotor voltage serves as an additional input to the system and theresulting field current as an additional, easy to measure, state variable. The presented approach makesuse of this fact and uses the field winding as the receiver of a carrier signal, which is injected into thestator winding. Like this no magnetic saliency is mandatory in order to track the position. The newapproach is compared to a well-known carrier signal based method, in which the stator works as thetransmitter and as the receiver of the carrier signal. In this case a magnetic saliency is mandatorywhich differs from the saliency necessary for permanent magnet synchronous machines. Theapplicability of both approaches is proven in experiments.

   Effects of short-time power outages and open phase failures on IPMSM sensorless rotor position estimation
By Salvatore DE CARO, Antonio TESTA, Giuseppe SCARCELLA, Mario CACCIATO, Giacomo SCELBA [View]
[Download]

Abstract: Sensorless motor drives are claimed to be more reliable than their sensored counterparts, as they avoid electromechanical sensors, additional wires and circuitries. However, the assertion is true only in normal operations. In fact, if on one hand the elimination of electromechanical, and electronic devices increases the drive reliability as a small number of parts subjected to possible faults are present, a sensorless algorithm needs some extra signals to reconstruct the rotor position. Line voltage drops, inverter failures or other disturbances, which, in general, do not affect the behavior of a conventional position sensor, can heavily perturb these extra signals, decreasing reliability. The robustness of sensorless control techniques in abnormal working conditions has been very little investigated in the past. In the paper an experimental analysis regarding the consistence of the estimation techniques is presented, in case of loss of a motor phase, or utility line disturbances. Focusing on Interior Permanent Magnet Synchronous Motor (IPMSM) drives, two main classes of sensorless angular position estimation approaches have been considered: Model-based and HF injection based techniques. Comments on the behavior of these two classes of sensorless approaches are added.

   Innovative Space Vector PWM control strategy for H-Bridge meeting specific Electric Vehicle drive constraints
By Abdelfatah KOLLI, Thomas NAFZIGER, Alexandre DE BERNARDINIS, Olivier BETHOUX, Eric LABOURE, Gerard COQUERY [View]
[Download]

Abstract: This paper deals with a 3-phase H-bridge inverter feeding a Permanent Magnet Synchronous Machine drive. An innovative Space Vector PWM strategy gathers electric vehicle (EV) specifications and objectives like high reachable base speed, minimization of zero-sequence current ripple and switching losses. In this paper, authors present experimental results performed on inductive inverter prototype.

EPE 2013 - LS2g: Advanced Drive Control and Sensorless Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 12: High performance drives > EPE 2013 - LS2g: Advanced Drive Control and Sensorless Techniques
	[return to parent folder]

	A Torque Ripple Reduction Method by Current Sensor Offset Error Compensation By Hiroshi TAMURA, Toshiyuki AJIMA, Yasuo NOTO	[View] [Download]
Abstract: This paper presents a reduction method for a torque ripple resulting from a motor phase current sensor offset error for motor drive applications such as a hybrid electric vehicle (HEV). The proposed method compensates for the detected motor phase current offset error by subtracting the detected motor phase current offset error value indirectly estimated using the inverter offset voltage reference value from the detected motor phase current value after the offset component of the inverter output voltage reference is calculated by a discrete Fourier transform and a digital low pass filter. The main feature of the proposed method is its ability to compensate for the detected motor phase current offset error that varies during inverter-motor drive. In this paper, the effectiveness of the proposed method with the motor torque analysis is discussed in detail. In the condition of the torque reference from 10[Nm] to 100[Nm] and the motor rotation speed of 1000[rpm], the average value of the torque ripple with the proposed method is 10[Nm] and is reduced by one-second (1/2) compared with the average value of the torque ripple without the proposed method.

	Carrier signal based sensorless control of electrically excited synchronous machines at standstill and low speed using the rotor winding as a receiver By Alexander RAMBETIUS, Bernhard PIEPENBREIER, Markus SEILMEIER, Sebastian EBERSBERGER	[View] [Download]
Abstract: This paper presents a new carrier signal based approach for motion sensorless control of electricallyexcited synchronous machines. In the case of permanent magnet synchronous machines sensorlesscontrol at standstill and low speed is mostly done by injecting a high-frequency voltage and evaluatingthe resulting current response. Hence, the stator is used as the transmitter and as the receiver of thecarrier signal. The major drawback is that a magnetic saliency is mandatory. In the case of electricallyexcited synchronous machines the rotor voltage serves as an additional input to the system and theresulting field current as an additional, easy to measure, state variable. The presented approach makesuse of this fact and uses the field winding as the receiver of a carrier signal, which is injected into thestator winding. Like this no magnetic saliency is mandatory in order to track the position. The newapproach is compared to a well-known carrier signal based method, in which the stator works as thetransmitter and as the receiver of the carrier signal. In this case a magnetic saliency is mandatorywhich differs from the saliency necessary for permanent magnet synchronous machines. Theapplicability of both approaches is proven in experiments.

	Effects of short-time power outages and open phase failures on IPMSM sensorless rotor position estimation By Salvatore DE CARO, Antonio TESTA, Giuseppe SCARCELLA, Mario CACCIATO, Giacomo SCELBA	[View] [Download]
Abstract: Sensorless motor drives are claimed to be more reliable than their sensored counterparts, as they avoid electromechanical sensors, additional wires and circuitries. However, the assertion is true only in normal operations. In fact, if on one hand the elimination of electromechanical, and electronic devices increases the drive reliability as a small number of parts subjected to possible faults are present, a sensorless algorithm needs some extra signals to reconstruct the rotor position. Line voltage drops, inverter failures or other disturbances, which, in general, do not affect the behavior of a conventional position sensor, can heavily perturb these extra signals, decreasing reliability. The robustness of sensorless control techniques in abnormal working conditions has been very little investigated in the past. In the paper an experimental analysis regarding the consistence of the estimation techniques is presented, in case of loss of a motor phase, or utility line disturbances. Focusing on Interior Permanent Magnet Synchronous Motor (IPMSM) drives, two main classes of sensorless angular position estimation approaches have been considered: Model-based and HF injection based techniques. Comments on the behavior of these two classes of sensorless approaches are added.

	Innovative Space Vector PWM control strategy for H-Bridge meeting specific Electric Vehicle drive constraints By Abdelfatah KOLLI, Thomas NAFZIGER, Alexandre DE BERNARDINIS, Olivier BETHOUX, Eric LABOURE, Gerard COQUERY	[View] [Download]
Abstract: This paper deals with a 3-phase H-bridge inverter feeding a Permanent Magnet Synchronous Machine drive. An innovative Space Vector PWM strategy gathers electric vehicle (EV) specifications and objectives like high reachable base speed, minimization of zero-sequence current ripple and switching losses. In this paper, authors present experimental results performed on inductive inverter prototype.