EPE Association: EPE 2020 - DS1f-1: Adjustable Speed Drives-1

EPE 2020 - DS1f-1: Adjustable Speed Drives-1
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 04: Electrical Machines and Drive Systems > EPE 2020 - DS1f-1: Adjustable Speed Drives-1

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   A Comparison of Two State-Space Models of an Induction Machine Considering Different Sets of Winding Distribution Harmonics
By Julien CORDIER [View]
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Abstract: The present paper compares two models of a low-power off-the-shelf induction machine. Each of them considers a specific set of winding distribution harmonics. One model takes into account the harmonic orders 1 and 17, while the other includes the orders 1, 5 and 11. These two sets of space harmonics are of particular interest as they give rise to a principal slot harmonic in the stator currents and produce unwanted torque oscillations. The model with space harmonics 1 and 17 has order 6, as does Park's. By contrast, its counterpart with harmonic orders 1, 5 and 11 features two additional states associated with rotor currents and directly linked to the harmonic torque ripple. The potential of each model with respect to drive control applications such as torque harmonic reduction is discussed.

   Generic control law for DC and AC machines
By Pierre-philippe ROBET [View]
[Download]

Abstract: In this paper we propose a generic method to get the gains of the controller of nested loops of current, velocity and position with an IP-IP-P structure. The literal expressions of the coefficients of the controller are identical for each three closed loop by changes of variables. By another changes of variables, the proposed method gives the controller coefficients calculation for a synchronous machine or an asynchronous machine.

   Low Speed Sensorless Current Control for PMSM with Search-Based Observer (SBO)
By Kris SCICLUNA [View]
[Download]

Abstract: This paper presents sensorless current control of a PMSM using a Search-Based Observer (SBO) employing HF injection. A continuous pulsating scheme is employed and the variation of the HF current amplitudes due to magnetic saliency is discussed for different current/speed operating points. The internal processes of the SBO are outlined with a PLL-based scheme to select a suitable Look-Up Table depending on the instantaneous q-axis current and rotor speed operating point. Sensorless current control results are shown for constant speed - variable load and also variable speed - constant full load operation.

   PWM-Induced Harmonic Power in 75 kW IM Drive System
By Lassi AARNIOVUORI [View]
[Download]

Abstract: More and more commonly, the rotating field machines are equipped with a frequency converter. The frequency converters enable the control of the magnetization state, torque and speed of the machine according to needs of applications and in principle save energy. In turn, the pulse-width-modulation (PWM) creates additional harmonic losses over the fundamental losses in the machine. The harmonic power induced by the PWM is examined here in a case of 75 kW high efficiency squirrel-cage induction motor. The examination is carried out using an experimental setup with three commercial frequency converters at 30 different operation points of the motor. In each of the measurement points, the three-phase voltage and current waveforms are recorded as well as the corresponding electric power, current and voltage values. In the analysis, the harmonic power is segregated from the total electric power and examined as a function of the frequency, load and switching frequency.

   Variable-speed-drive-based sensorless estimation of pump system reservoir fluid level
By Santeri PÖYHÖNEN [View]
[Download]

Abstract: This paper proposes a soft sensor for estimating the surface level of a reservoir in a centrifugal pumping system. The proposed soft sensor can be implemented in the control scheme of a variable-speed drive and requires no extra equipment to function.

   Vibration suppression and control parameter design of a sensorless PMSM rotary compressor drive
By Tao LI [View]
[Download]

Abstract: The mechanical vibration and the associated acoustic noise problem of variable frequency rotary compressor systems have been concerned by engineers for years. This paper proposes a scheme to reduce the vibration of a sensorless controlled rotary compressor by using bi-quad filter. The paper presents the overall system control architecture as well as a method to design motor speed adaptation parameters and the bi-quad filter parameters. The impacts of motor parameter variation have been analyzed, too. Both simulation and experiment results show that the bi-quad filter can reduce the mechanical vibration effectively and the way of control parameter selection can guarantee the bandwidth of speed estimation and the stability of the speed control loop. By integrating the result of this paper into an industrial drive control software, automatic control parameter commissioning can be achieved after identifying motor electric parameters, which is a meaningful product feature from an engineering point of view.

EPE 2020 - DS1f-1: Adjustable Speed Drives-1
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 04: Electrical Machines and Drive Systems > EPE 2020 - DS1f-1: Adjustable Speed Drives-1
	[return to parent folder]

	A Comparison of Two State-Space Models of an Induction Machine Considering Different Sets of Winding Distribution Harmonics By Julien CORDIER	[View] [Download]
Abstract: The present paper compares two models of a low-power off-the-shelf induction machine. Each of them considers a specific set of winding distribution harmonics. One model takes into account the harmonic orders 1 and 17, while the other includes the orders 1, 5 and 11. These two sets of space harmonics are of particular interest as they give rise to a principal slot harmonic in the stator currents and produce unwanted torque oscillations. The model with space harmonics 1 and 17 has order 6, as does Park's. By contrast, its counterpart with harmonic orders 1, 5 and 11 features two additional states associated with rotor currents and directly linked to the harmonic torque ripple. The potential of each model with respect to drive control applications such as torque harmonic reduction is discussed.

	Generic control law for DC and AC machines By Pierre-philippe ROBET	[View] [Download]
Abstract: In this paper we propose a generic method to get the gains of the controller of nested loops of current, velocity and position with an IP-IP-P structure. The literal expressions of the coefficients of the controller are identical for each three closed loop by changes of variables. By another changes of variables, the proposed method gives the controller coefficients calculation for a synchronous machine or an asynchronous machine.

	Low Speed Sensorless Current Control for PMSM with Search-Based Observer (SBO) By Kris SCICLUNA	[View] [Download]
Abstract: This paper presents sensorless current control of a PMSM using a Search-Based Observer (SBO) employing HF injection. A continuous pulsating scheme is employed and the variation of the HF current amplitudes due to magnetic saliency is discussed for different current/speed operating points. The internal processes of the SBO are outlined with a PLL-based scheme to select a suitable Look-Up Table depending on the instantaneous q-axis current and rotor speed operating point. Sensorless current control results are shown for constant speed - variable load and also variable speed - constant full load operation.

	PWM-Induced Harmonic Power in 75 kW IM Drive System By Lassi AARNIOVUORI	[View] [Download]
Abstract: More and more commonly, the rotating field machines are equipped with a frequency converter. The frequency converters enable the control of the magnetization state, torque and speed of the machine according to needs of applications and in principle save energy. In turn, the pulse-width-modulation (PWM) creates additional harmonic losses over the fundamental losses in the machine. The harmonic power induced by the PWM is examined here in a case of 75 kW high efficiency squirrel-cage induction motor. The examination is carried out using an experimental setup with three commercial frequency converters at 30 different operation points of the motor. In each of the measurement points, the three-phase voltage and current waveforms are recorded as well as the corresponding electric power, current and voltage values. In the analysis, the harmonic power is segregated from the total electric power and examined as a function of the frequency, load and switching frequency.

	Variable-speed-drive-based sensorless estimation of pump system reservoir fluid level By Santeri PÖYHÖNEN	[View] [Download]
Abstract: This paper proposes a soft sensor for estimating the surface level of a reservoir in a centrifugal pumping system. The proposed soft sensor can be implemented in the control scheme of a variable-speed drive and requires no extra equipment to function.

	Vibration suppression and control parameter design of a sensorless PMSM rotary compressor drive By Tao LI	[View] [Download]
Abstract: The mechanical vibration and the associated acoustic noise problem of variable frequency rotary compressor systems have been concerned by engineers for years. This paper proposes a scheme to reduce the vibration of a sensorless controlled rotary compressor by using bi-quad filter. The paper presents the overall system control architecture as well as a method to design motor speed adaptation parameters and the bi-quad filter parameters. The impacts of motor parameter variation have been analyzed, too. Both simulation and experiment results show that the bi-quad filter can reduce the mechanical vibration effectively and the way of control parameter selection can guarantee the bandwidth of speed estimation and the stability of the speed control loop. By integrating the result of this paper into an industrial drive control software, automatic control parameter commissioning can be achieved after identifying motor electric parameters, which is a meaningful product feature from an engineering point of view.