DSP-Based sensorless electric motor fault-diagnosis tools for electric and hybrid electric vehicle powertrain applications

Bilal Akin*, Salih Baris Ozturk, Hamid A. Toliyat, Mark Rayner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


The integrity of electric motors in work and passenger vehicles can best be maintained by frequently monitoring their condition. In this paper, a signal processing-based motor fault-diagnosis scheme in detail is presented. The practicability and reliability of the proposed algorithm are tested on rotor asymmetry detection at zero speed, i.e., at startup and idle modes in the case of a vehicle. Regular rotor asymmetry tests are done when the motor is running at a certain speed under load with stationary current signal assumption. It is quite challenging to obtain these regular test conditions for long-enough periods of time during daily vehicle operations. In addition, automobile vibrations cause nonuniform air-gap motor operation that directly affects the inductances of electric motors and results in a noisy current spectrum. Therefore, it is challenging to apply conventional rotor fault-detection methods while examining the condition of electric motors as part of the hybrid electric vehicle (HEV) powertrain. The proposed method overcomes the aforementioned problems by simply testing the rotor asymmetry at zero speed. This test can be achieved at startup or repeated during idle modes, where the speed of the vehicle is zero. The proposed method can be implemented at no cost using the readily available electric motor inverter sensor and microprocessing unit. Induction motor fault signatures are experimentally tested online by employing the drive-embedded master processor [TMS320F2812 digital signal processor (DSP)] to prove the effectiveness of the proposed method.

Original languageEnglish
Pages (from-to)2679-2688
Number of pages10
JournalIEEE Transactions on Vehicular Technology
Issue number6
Publication statusPublished - 2009
Externally publishedYes


  • Digital signal processor (DSP)-based fault detection
  • Hybrid electric vehicle (HEV)
  • Induction motor
  • Motor fault diagnosis


Dive into the research topics of 'DSP-Based sensorless electric motor fault-diagnosis tools for electric and hybrid electric vehicle powertrain applications'. Together they form a unique fingerprint.

Cite this