QC/T 893-2011Failure classification and assessment of drive motor systems for electric vehicles (English PDF)
电动汽车用驱动电机系统故障分类及判断
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
December 20, 2011
Implementation date
July 1, 2012
Scope
QC/T 893-2011 is the English-translated version of 电动汽车用驱动电机系统故障分类及判断.
QC/T 893-2011 is the Chinese automotive industry standard for classifying and assessing failures of the drive motor system in electric vehicles.
It sets the principles for judging a failure mode, describing each fault through the drive motor, the components of the motor controller and the wiring between them, and rating a chained failure by the most severe level it causes.
Failures are graded by hazard into four levels: fatal, serious, ordinary and minor. A normative annex groups the failure modes into damage, degradation, offset (gap deviation, interference, performance offset) and blockage and leakage, and an informative annex gives worked examples of modes and their classification.
It covers all types of drive motor system for electric vehicles. Issued on 20 December 2011, it has applied since 1 July 2012.
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Document preview — QC/T 893-2011
National Standard of the People's Republic of China
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword6
- 1 Scope7
- 2 Normative references7
- 3 Terms and definitions7
- 4 Judgment principles of failure modes7
- 5 Failure classification8
- Appendix A (Normative) Drive motor system failure mode9
- APPENDIX B (Informative) Examples of failure mode and classification of drive motor system12
Foreword
This standard was drafted in accordance with the rules specified in GB/T 1.1-2009.
1 Scope
This standard specifies the failure judgment principles, failure modes, and failure classification of the electrical machine system for electric vehicle.
This standard applies to all types of electrical machine system for electric vehicle.
2 Normative references
The following documents are essential to the application of this document.
For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this Standard.
GB/T 18488 (all parts) - The electrical machines and controllers for electric vehicles - Technical specification
GB/T 19596 Terminology of electric vehicles
3 Terms and definitions
The terms and definitions established in GB/T 19596, GB/T 18488 (all parts) and the terms in Appendix A apply to this standard.
4 Judgment principles of failure modes
4.1 In principle, it shall use the failure mode of the drive motor (hereinafter referred to as the motor), the components of the motor controller, and the wiring between them to describe the failure.
4.4 As for the association failure occurred due to other failure, it shall use the failure of the highest level caused to classify the failure.
4.5 When the failure is classified, if the failure extends, it shall, in accordance with Chapter 5, conduct qualitative identification based on levels.
5 Failure classification
Based on the hazardous degree, the failure can be divided into four levels. fatal failure, serious failure, ordinary failure, and minor failure.
Appendix A (Normative) Drive motor system failure mode
A.1 Damage failure mode
Damage failure modes mainly include.
A.2 Degradation failure mode
Degradation failure modes mainly include.
A.4 Offset failure mode
Offset failure mode mainly includes.
- Gap deviation. The phenomenon that the function is affected by the contact gap or fit clearance exceeding the specified value, such as the gap deviation of contactor, bearing, and so on.
- Interference. The phenomenon of collision or abnormal friction between moving parts, such as the interference between fan blades and wind hood, speed sensor and tooth plate, motor stator and rotor, and so on.
- Performance offset. The instability of critical output, such as the oscillation or instability of output torque and speed.
A.5 Blockage and leakage failure modes
Blockage and leakage failure modes mainly include.
- Blockage. The phenomenon that the fluid in the pipeline cannot flow OR flow smoothly, such as the pipeline of the liquid-cooled motor and controller.
APPENDIX B (Informative)
Examples of failure mode and classification of drive motor system Drive motor system failure modes include, but are not limited to, those in Table B.1 ~ Table B.4. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 18488.2-2015 — [Replaced by GB/T 18488-2024] Drive motor system for electric vehicles -- Part 2: Test methods
GB/T 18488-2024 — Drive motor systems for electric vehicles
GB/T 19596-2017 — Terminology of electric vehicles
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