EPE Association: EPE 2017 - DS3g: Adjustable speed drives I

EPE 2017 - DS3g: Adjustable speed drives I
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - DS3g: Adjustable speed drives I

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   Bearing currents of a 2.4 kW-PM synchronous motor fan drive with integrated frequency inverter
By Martin SCHUSTER [View]
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Abstract: A calculation of the high frequency machine capacitances is presented and compared with measured bearing currents of a small outer rotor 2.4 kW-fan PM synchronous motor with a tooth-coil winding. The integrated two-level voltage-source, 16 kHz switching frequency IGBT inverter, operates at Vdc = 540 V DC link voltage. Due to the small size of the motor no circulating bearing currents can occur, but only discharge bearing currents. The measured bearing current density of approximately 0.1 A/mm² is small enough to avoid a bearing damage.

   Current and Speed Sensor FDIR for a DFIM Grid Connected Variable Speed Pumped Storage System
By Amel DAMDOUM [View]
[Download]

Abstract: This paper proposes Fault Detection, Isolation and Reconfiguration (FDIR) techniques to realize the connection of a DFIM pumped storage system with the grid in the presence of current and speed sensor failures. For the detection method authors use the parity space approach either for current sensor failure or the rotation speed one. The proposed reconfiguration techniques exploit stator flux estimation using existing stator current and voltage measurements. All studied system (DFIM pumped storage and grid) with proposed FDIR strategy is simulated using PSIM software. Next, simulations and experimental results are given to validate the synchronization phase in healthy conditions and to demonstrate the effectiveness of the proposed detection method to isolate the faulty sensor and to guarantee the satisfactory behavior of this system.

   Motor friendliness of variable frequency drives with output transformer
By Martin BRUHA [View]
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Abstract: This paper evaluates the impact of output transformer on the power quality and especially the motor friendliness. A comparison of systems with and without transformer is made and the results are visualized. An output transformer with voltage ratio of 1 is used so that an identical motor is used in both cases for the purpose of easy comparison. The main conclusion is that the presence of an output transformer can positively impact the current and voltage waveform and increase the motor friendliness.

   Power Supply with Active Energy Storage to Reuse the Breaking Energy for Servo Drives
By Johannes RUTHARDT [View]
[Download]

Abstract: This paper presents a new power supply consisting of an inverter and a power factor correcting stage with an integrated active energy storage for servo drives. The energy storage is realized with a capacitor and a DC-DC-converter. This enables the power supply to reuse the breaking energy of servo drives instead of losing it in a breaking chopper resistor. The main advantage is the simple integration of the active storage to the power factor correcting stage.

   Predictive control of three-level DC/AC inverter fed PMSM with torque ripple minimization and constant switching frequency
By Rafal GRODZKI [View]
[Download]

Abstract: The presented DTC-3V-3L method was designed to ensure the high performance of PMSM drive. Using the predictive approach the algorithm minimizes torque ripples, ensures constant switching frequency and DC link voltage balancing. Moreover, it also provides the fastest dynamic torque response, similar to the fastest non-linear methods.

   Remote Monitoring of Fluid Handling Systems with Variable-Speed Drive
By Tero AHONEN [View]
[Download]

Abstract: Operation and condition of fluid handling systems can be monitored with soft sensors applying variable-speed drive estimates. This paper studies the use possibilities of modern variable-speed drives in the remote diagnostics of pump and fan systems. Paper also introduces cases, where system maintenance need could be determined with the variable-speed drive.

EPE 2017 - DS3g: Adjustable speed drives I
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - DS3g: Adjustable speed drives I
	[return to parent folder]

	Bearing currents of a 2.4 kW-PM synchronous motor fan drive with integrated frequency inverter By Martin SCHUSTER	[View] [Download]
Abstract: A calculation of the high frequency machine capacitances is presented and compared with measured bearing currents of a small outer rotor 2.4 kW-fan PM synchronous motor with a tooth-coil winding. The integrated two-level voltage-source, 16 kHz switching frequency IGBT inverter, operates at Vdc = 540 V DC link voltage. Due to the small size of the motor no circulating bearing currents can occur, but only discharge bearing currents. The measured bearing current density of approximately 0.1 A/mm² is small enough to avoid a bearing damage.

	Current and Speed Sensor FDIR for a DFIM Grid Connected Variable Speed Pumped Storage System By Amel DAMDOUM	[View] [Download]
Abstract: This paper proposes Fault Detection, Isolation and Reconfiguration (FDIR) techniques to realize the connection of a DFIM pumped storage system with the grid in the presence of current and speed sensor failures. For the detection method authors use the parity space approach either for current sensor failure or the rotation speed one. The proposed reconfiguration techniques exploit stator flux estimation using existing stator current and voltage measurements. All studied system (DFIM pumped storage and grid) with proposed FDIR strategy is simulated using PSIM software. Next, simulations and experimental results are given to validate the synchronization phase in healthy conditions and to demonstrate the effectiveness of the proposed detection method to isolate the faulty sensor and to guarantee the satisfactory behavior of this system.

	Motor friendliness of variable frequency drives with output transformer By Martin BRUHA	[View] [Download]
Abstract: This paper evaluates the impact of output transformer on the power quality and especially the motor friendliness. A comparison of systems with and without transformer is made and the results are visualized. An output transformer with voltage ratio of 1 is used so that an identical motor is used in both cases for the purpose of easy comparison. The main conclusion is that the presence of an output transformer can positively impact the current and voltage waveform and increase the motor friendliness.

	Power Supply with Active Energy Storage to Reuse the Breaking Energy for Servo Drives By Johannes RUTHARDT	[View] [Download]
Abstract: This paper presents a new power supply consisting of an inverter and a power factor correcting stage with an integrated active energy storage for servo drives. The energy storage is realized with a capacitor and a DC-DC-converter. This enables the power supply to reuse the breaking energy of servo drives instead of losing it in a breaking chopper resistor. The main advantage is the simple integration of the active storage to the power factor correcting stage.

	Predictive control of three-level DC/AC inverter fed PMSM with torque ripple minimization and constant switching frequency By Rafal GRODZKI	[View] [Download]
Abstract: The presented DTC-3V-3L method was designed to ensure the high performance of PMSM drive. Using the predictive approach the algorithm minimizes torque ripples, ensures constant switching frequency and DC link voltage balancing. Moreover, it also provides the fastest dynamic torque response, similar to the fastest non-linear methods.

	Remote Monitoring of Fluid Handling Systems with Variable-Speed Drive By Tero AHONEN	[View] [Download]
Abstract: Operation and condition of fluid handling systems can be monitored with soft sensors applying variable-speed drive estimates. This paper studies the use possibilities of modern variable-speed drives in the remote diagnostics of pump and fan systems. Paper also introduces cases, where system maintenance need could be determined with the variable-speed drive.