EPE Association: EPE 2022 - DS3d: Measurement Techniques, Sensors and State Observers

EPE 2022 - DS3d: Measurement Techniques, Sensors and State Observers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 04: Electrical Machines and Drive Systems > EPE 2022 - DS3d: Measurement Techniques, Sensors and State Observers

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   Characterization of Conventional and Advanced Current Measurement Techniques Suitable for WBG Semiconductor Devices
By Severin KLEVER [View]
[Download]

Abstract: With wide bandgap semiconductor devices, conventional current sensors like Rogowski coils and coaxial shunts reach their limits in bandwidth or parasitic inductance. Therefore, novel techniques are continuously being developed, which promise improved characteristics. In order to evaluate the performance of current sensors, it is necessary to compare them in a uniform environment. In this work, different sensors for currents up to 100A and frequencies of several 100MHz are characterized in the frequency- and time-domain. The characteristics bandwidth, parasitic inductance and delay are determined by measurement and compared to each other. Among the advanced measurement techniques is a design consisting of coaxially arranged discrete resistors. A prototype is built based on this idea and tested against the other sensors. The prototype outperforms the conventional sensors and is validated in a double pulse test with Gallium nitride devices.

   Condition Monitoring Approach of a SiC Power Semiconductor using Turn-Off Delay with an Integration in a SiC Driver
By Victor GOLEV [View]
[Download]

Abstract: This paper deals with a condition monitoring approach based on the turn-off delay measurement and its integration in a SiC driver to measure the temperature-sensitive parameters in a continuous switching operation of a SiC power semiconductor. The presented approach requires a small area for integration and can be implemented with little effort.

   Design Considerations for Fast On-State Voltage Measurement Circuits
By Mathias WEISER [View]
[Download]

Abstract: The recovery time of on-state voltage measurement circuits (OVMCs) is a critical, yet often overlooked aspect of the proper switching characterization of power semiconductor devices. In this work, we aim to provide a deeper understanding of the problem and propose ways to enhance the dynamic performance.

   Design For Enhanced Noise Immunity of PCB Coils used for Sensing Current through Power Devices
By Aamir RAFIQ [View]
[Download]

Abstract: PCB coil, when placed near a current carrying trace, senses the rate of change of current by virtue of its flux linkages through the coil. Thereafter, the coil output is integrated to obtain the sensor output which is proportional to the trace current. Proximity of the PCB coil to external current carrying conductors can make the coil susceptible to undesired flux linkages which can interfere with the operation of the sensor. Furthermore, presence of a switching node near the coil, with high dv/dt, can influence the sensor output through parasitic coupling with the coil. This paper investigates the influence of external magnetic fields as well as on-board dv/dt on the performance of PCB coil based current sensors. Based on theoretical analysis followed by experimental investigations on two PCB coil prototypes on a half-bridge board, design guidelines for enhancing noise immunity of PCB coils are presented.

   Evaluation of Drain-Source Voltage in Switch Transient Time Intervals as Gate Oxide Degradation Precursor of SiC Power MOSFETs
By Javad NAGHIBI [View]
[Download]

Abstract: Gate oxide degradation is a major chip-related reliability issue in Silicon Carbide power MOSFETs. Being focused on turn-on/-off transient behavior of the switch, drain-source voltage waveform is employed as a gate oxide degradation precursor in this paper. Precursor evaluation is carried out in various operating conditions of the switch.

   Influences of Parasitic Capacitances in Wide Bandwidth Rogowski Coils for Commutation Current Measurement
By Philipp ZIEGLER [View]
[Download]

Abstract: This paper focuses on the capacitive coupling of PCB integrated Rogowski coils for commutation currentmeasurement. It investigates the cause and the influence of parasitic capacitances on the measurementsignal. It discusses the advantages of a differential winding arrangement and the reasons why shieldingis not an option in this application. The parasitic capacitance of three different winding arrangements aremeasured and compared to a Rogowski coil approach with minimized parasitic capacitance. On the baseof sensor prototypes, the influence on the measurement is investigated in a pulsed current source.

   Measurement Principle for Measuring High Frequency Bearing Currents in Electric Machines and Drive Systems
By Benjamin KNEBUSCH [View]
[Download]

Abstract: In this paper, a new principle for measuring bearing currents will be presented and validated using a replica of a drive system. The idea is to insulate the bearing and create a new current path on a PCB forthe bearing current, together with a defined impedance in that path.

EPE 2022 - DS3d: Measurement Techniques, Sensors and State Observers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 04: Electrical Machines and Drive Systems > EPE 2022 - DS3d: Measurement Techniques, Sensors and State Observers
	[return to parent folder]

	Characterization of Conventional and Advanced Current Measurement Techniques Suitable for WBG Semiconductor Devices By Severin KLEVER	[View] [Download]
Abstract: With wide bandgap semiconductor devices, conventional current sensors like Rogowski coils and coaxial shunts reach their limits in bandwidth or parasitic inductance. Therefore, novel techniques are continuously being developed, which promise improved characteristics. In order to evaluate the performance of current sensors, it is necessary to compare them in a uniform environment. In this work, different sensors for currents up to 100A and frequencies of several 100MHz are characterized in the frequency- and time-domain. The characteristics bandwidth, parasitic inductance and delay are determined by measurement and compared to each other. Among the advanced measurement techniques is a design consisting of coaxially arranged discrete resistors. A prototype is built based on this idea and tested against the other sensors. The prototype outperforms the conventional sensors and is validated in a double pulse test with Gallium nitride devices.

	Condition Monitoring Approach of a SiC Power Semiconductor using Turn-Off Delay with an Integration in a SiC Driver By Victor GOLEV	[View] [Download]
Abstract: This paper deals with a condition monitoring approach based on the turn-off delay measurement and its integration in a SiC driver to measure the temperature-sensitive parameters in a continuous switching operation of a SiC power semiconductor. The presented approach requires a small area for integration and can be implemented with little effort.

	Design Considerations for Fast On-State Voltage Measurement Circuits By Mathias WEISER	[View] [Download]
Abstract: The recovery time of on-state voltage measurement circuits (OVMCs) is a critical, yet often overlooked aspect of the proper switching characterization of power semiconductor devices. In this work, we aim to provide a deeper understanding of the problem and propose ways to enhance the dynamic performance.

	Design For Enhanced Noise Immunity of PCB Coils used for Sensing Current through Power Devices By Aamir RAFIQ	[View] [Download]
Abstract: PCB coil, when placed near a current carrying trace, senses the rate of change of current by virtue of its flux linkages through the coil. Thereafter, the coil output is integrated to obtain the sensor output which is proportional to the trace current. Proximity of the PCB coil to external current carrying conductors can make the coil susceptible to undesired flux linkages which can interfere with the operation of the sensor. Furthermore, presence of a switching node near the coil, with high dv/dt, can influence the sensor output through parasitic coupling with the coil. This paper investigates the influence of external magnetic fields as well as on-board dv/dt on the performance of PCB coil based current sensors. Based on theoretical analysis followed by experimental investigations on two PCB coil prototypes on a half-bridge board, design guidelines for enhancing noise immunity of PCB coils are presented.

	Evaluation of Drain-Source Voltage in Switch Transient Time Intervals as Gate Oxide Degradation Precursor of SiC Power MOSFETs By Javad NAGHIBI	[View] [Download]
Abstract: Gate oxide degradation is a major chip-related reliability issue in Silicon Carbide power MOSFETs. Being focused on turn-on/-off transient behavior of the switch, drain-source voltage waveform is employed as a gate oxide degradation precursor in this paper. Precursor evaluation is carried out in various operating conditions of the switch.

	Influences of Parasitic Capacitances in Wide Bandwidth Rogowski Coils for Commutation Current Measurement By Philipp ZIEGLER	[View] [Download]
Abstract: This paper focuses on the capacitive coupling of PCB integrated Rogowski coils for commutation currentmeasurement. It investigates the cause and the influence of parasitic capacitances on the measurementsignal. It discusses the advantages of a differential winding arrangement and the reasons why shieldingis not an option in this application. The parasitic capacitance of three different winding arrangements aremeasured and compared to a Rogowski coil approach with minimized parasitic capacitance. On the baseof sensor prototypes, the influence on the measurement is investigated in a pulsed current source.

	Measurement Principle for Measuring High Frequency Bearing Currents in Electric Machines and Drive Systems By Benjamin KNEBUSCH	[View] [Download]
Abstract: In this paper, a new principle for measuring bearing currents will be presented and validated using a replica of a drive system. The idea is to insulate the bearing and create a new current path on a PCB forthe bearing current, together with a defined impedance in that path.