Abstract
The over-current condition for a traction inverter can indicate flaws on control algorithms, interference on logic signals, hardware aging, or hardware misconduct. Thus, proper detection of over-current conditions during inverter operation is a critical item for inverter development and product validation. This paper reviews several widely used over-current detection methods and a few theoretically approved over-current detection methods. The main focus of this review includes the sensing bandwidth, sensing accuracy, and implementation complexity of the studied over-current detection methods. The advantages of those widely used methods and the application requirements for the theoretically and prototypingly approved methods are concluded by this review.
Highlights
In industrial applications and automotive applications, traction inverters are commonly used to convert DC input to AC output. e operating condition of a traction inverter can affect the power conversion output characteristics, the DC input’s performance, and the inverter’s self-reliability
Current and temperature are two of the critical metrics for inverter operation reliability. Inverter components such as power semiconductor and DC link capacitors are designed to operate within a safe current range and temperature range
Separate discussions for traction inverter open-circuit faults and short-circuit faults clarify the application of traction inverter current sensing on the two major inverter operation faults [4]. e short-circuit fault can result in a sudden current increase in the traction inverter, and the study in [4] falls into the category of this review. e temperature sensing on inverter’s critical components, for instance, switching power semiconductor, can sometimes include current sensing. e temperaturecurrent look-up tables in [5] indicate that, in some applications, accurate current sensing, especially at high current conditions, is a factor for accurate temperature sensing
Summary
Received 9 December 2020; Revised 28 December 2020; Accepted 8 January 2021; Published 21 January 2021. E over-current condition for a traction inverter can indicate flaws on control algorithms, interference on logic signals, hardware aging, or hardware misconduct. Us, proper detection of over-current conditions during inverter operation is a critical item for inverter development and product validation. Is paper reviews several widely used over-current detection methods and a few theoretically approved over-current detection methods. E main focus of this review includes the sensing bandwidth, sensing accuracy, and implementation complexity of the studied over-current detection methods. E advantages of those widely used methods and the application requirements for the theoretically and prototypingly approved methods are concluded by this review E over-current condition for a traction inverter can indicate flaws on control algorithms, interference on logic signals, hardware aging, or hardware misconduct. us, proper detection of over-current conditions during inverter operation is a critical item for inverter development and product validation. is paper reviews several widely used over-current detection methods and a few theoretically approved over-current detection methods. e main focus of this review includes the sensing bandwidth, sensing accuracy, and implementation complexity of the studied over-current detection methods. e advantages of those widely used methods and the application requirements for the theoretically and prototypingly approved methods are concluded by this review
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