EPE Association: EPE 2016 - DS3e: Motion Control, Robotics, Special Drives

EPE 2016 - DS3e: Motion Control, Robotics, Special Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 04: Electrical Machines and Drive Systems > EPE 2016 - DS3e: Motion Control, Robotics, Special Drives

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   Electric drive system power simulator
By Anatoliy ZIUZEV [View]
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Abstract: Simulator of electric drive system based on power converter with control system which realizes in realtime model of converter, motor and mechanism is discussed. Power simulator is intended forconverters testing and for their operating modes studying. Simulator repeats electric driveinstantaneous current and angular velocity.

   HF Parameter Identification Using Test Current Injection for Sensorless Control of a Synchronous Reluctance Machine (SynRM)
By Martha BUGSCH [View]
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Abstract: An increasing number of sensorless control methods are being developed for a recently rediscovered machine type: synchronous reluctance machines (SynRMs). The advantage of sensorless control methods is that the position sensor can be omitted. Many alternative methods are conceivable, but in all of them, it is impossible to observe and estimate the electrical rotor position at standstill and at low speed without additional excitation via high-frequency (HF) test signals. To calculate the position information from the current or voltage response of these test signals, a detailed machine model is necessary. The challenge is to identify the parameter of the machine model that characterises the HF machine behaviour. Thus, there is a need to find a proper identification method and to analyse these HF parameters for different HF test signal frequencies and amplitudes. Thereby, one can determine which test signal frequencies and amplitudes are best suited for sensorless control of SynRMs.Therefore in this paper an HF parameter identification method is described and the corresponding measurement results for a SynRM are analysed. A test current signal injection method is used. Different test signal frequencies and amplitudes, as well as the position dependencies, are compared. It can be concluded that, first a appropriate test signal frequency and amplitude combination has to be selected that offers enough voltage reserve to control the fundamental behaviour of the machine. Moreover, the HF parameters should be measured exactly for the combination used because there is a dependency of the HF parameters on the test signal frequency and amplitude that is significant but not equally strong. Position averaged measured values ensure high-precision HF parameter results. SynRMs are suitable for saliency-based sensorless control methods based on test signal injection because they have an inherent machine parameter saliency due to their rotor design.

   Synchronous SVPWM Over-modulation Method Based on Zero-Sequence Voltage Injection in Locomotive Traction
By Guibin LI [View]
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Abstract: High speed motor control is a key technology in the locomotive traction system. Because of the limitation of the switching frequency and voltage level in high power inverter, modulation method with high voltage utilization ratio and lower low-frequency harmonics is necessary. In this paper, a novel PWM method equivalent with the traditional SVPWM method is proposed, which is realized by the comparison of zero-sequence voltage injected modulation wave and carrier-waves. The over-modulation and smooth transition to six-step square wave modulation was realized by the adjustment of the modulation wave. Moreover, the synchronous modulation can be applied to reduce low-frequency harmonics by the adjustment of the carrier-wave frequency. The corresponding motor control method including flux-weakening control and current open-loop control are also proposed in coordination with the modulation method. The validity of the proposed method has been verified by both simulation in MATLAB and experiments on an industrial 160kW, 750V experimental platform.

EPE 2016 - DS3e: Motion Control, Robotics, Special Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 04: Electrical Machines and Drive Systems > EPE 2016 - DS3e: Motion Control, Robotics, Special Drives
	[return to parent folder]

	Electric drive system power simulator By Anatoliy ZIUZEV	[View] [Download]
Abstract: Simulator of electric drive system based on power converter with control system which realizes in realtime model of converter, motor and mechanism is discussed. Power simulator is intended forconverters testing and for their operating modes studying. Simulator repeats electric driveinstantaneous current and angular velocity.

	HF Parameter Identification Using Test Current Injection for Sensorless Control of a Synchronous Reluctance Machine (SynRM) By Martha BUGSCH	[View] [Download]
Abstract: An increasing number of sensorless control methods are being developed for a recently rediscovered machine type: synchronous reluctance machines (SynRMs). The advantage of sensorless control methods is that the position sensor can be omitted. Many alternative methods are conceivable, but in all of them, it is impossible to observe and estimate the electrical rotor position at standstill and at low speed without additional excitation via high-frequency (HF) test signals. To calculate the position information from the current or voltage response of these test signals, a detailed machine model is necessary. The challenge is to identify the parameter of the machine model that characterises the HF machine behaviour. Thus, there is a need to find a proper identification method and to analyse these HF parameters for different HF test signal frequencies and amplitudes. Thereby, one can determine which test signal frequencies and amplitudes are best suited for sensorless control of SynRMs.Therefore in this paper an HF parameter identification method is described and the corresponding measurement results for a SynRM are analysed. A test current signal injection method is used. Different test signal frequencies and amplitudes, as well as the position dependencies, are compared. It can be concluded that, first a appropriate test signal frequency and amplitude combination has to be selected that offers enough voltage reserve to control the fundamental behaviour of the machine. Moreover, the HF parameters should be measured exactly for the combination used because there is a dependency of the HF parameters on the test signal frequency and amplitude that is significant but not equally strong. Position averaged measured values ensure high-precision HF parameter results. SynRMs are suitable for saliency-based sensorless control methods based on test signal injection because they have an inherent machine parameter saliency due to their rotor design.

	Synchronous SVPWM Over-modulation Method Based on Zero-Sequence Voltage Injection in Locomotive Traction By Guibin LI	[View] [Download]
Abstract: High speed motor control is a key technology in the locomotive traction system. Because of the limitation of the switching frequency and voltage level in high power inverter, modulation method with high voltage utilization ratio and lower low-frequency harmonics is necessary. In this paper, a novel PWM method equivalent with the traditional SVPWM method is proposed, which is realized by the comparison of zero-sequence voltage injected modulation wave and carrier-waves. The over-modulation and smooth transition to six-step square wave modulation was realized by the adjustment of the modulation wave. Moreover, the synchronous modulation can be applied to reduce low-frequency harmonics by the adjustment of the carrier-wave frequency. The corresponding motor control method including flux-weakening control and current open-loop control are also proposed in coordination with the modulation method. The validity of the proposed method has been verified by both simulation in MATLAB and experiments on an industrial 160kW, 750V experimental platform.