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QC/T 1069-2017

Chinese Standard: 'QC/T 1069-2017'
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Detail Information of QC/T 1069-2017; QC/T1069-2017
Description (Translated English): (Permanent Magnet Synchronous Drive Motor System for Electric Vehicles)
Sector / Industry: Automobile & Vehicle Industry Standard (Recommended)
Date of Issue: 2017-01-09
Date of Implementation: 2017-07-01
Regulation (derived from): Ministry of Industry and Information Technology Announcement No.2 of 2017
Summary: This standard specifies the technical requirements, test methods, inspection rules, signs and signs of permanent magnet synchronous drive motor systems for electric vehicles.

QC/T 1069-2017
QC
AUTO INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040
T 35
Permanent magnet synchronous
drive motor system for electric vehicles
电动汽车用永磁同步驱动电机系统
ISSUED ON. JANUARY 9, 2017
IMPLEMENTED ON. JULY 1, 2017
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents 
Foreword ... 9 
1 Scope ... 10 
2 Normative references ... 10 
3 Terms and definitions ... 10 
4 Technical requirements ... 12 
5 Test methods ... 13 
6 Inspection rules ... 16 
7 Marks and identifiers ... 16 
Annex A (Normative) Inspection classification ... 17 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009
“Directives for standardization - Part 1. Structure and drafting of standards”.
This Standard was proposed by and shall be under the jurisdiction of National
Technical Committee on Automobiles of Standardization Administration of
China (SAC/TC 114).
The drafting organizations of this Standard. Shanghai Electric Drive Co., Ltd.,
Beijing Institute of Technology, Anhui Ankai Automobile Co., Ltd., China
Automotive Technology and Research Center, CRRC Zhuzhou Electric
Locomotive Research Institute Co., Ltd., Zhejiang Younet Motor Co., Ltd.,
Tianjin Qingyuan Electric Vehicle Co., Ltd., Anhui Juyi Automation Equipment
Co., Ltd., Shanghai Automotive Group Co., Ltd., Dayang Motor New Power
Technology Co., Ltd., BYD Auto Industry Co., Ltd., Jingjin Electric Technology
(Beijing) Co., Ltd., Shanghai Dajun Power Control Technology Co., Ltd.,
Chongqing Chang'an New Energy Automobile Co., Ltd.
Main drafters of this Standard. Ying Hongliang, Jia Aiping, Song Qiang, Wu
Qingmiao, Zha Baoying, Chen Shundong, Gao Jinwen, Li Yifeng, Huang Xin,
Li Bo, Dou Ruzhen, Fu Guangsheng, Zhou Xuguang, Cai Wei, Lei Xiaojun, Xue
Shan.
Permanent magnet synchronous
drive motor system for electric vehicles
1 Scope
This Standard specifies the technical requirements, test methods, inspection
rules, marks and identifiers of permanent magnet synchronous drive motor
system for electric vehicles.
This Standard is applicable to the permanent magnet synchronous drive motor
system for electric vehicles.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB 755, Packaging and storage marks
GB/T 2900.25, Electrotechnical terminology - Rotating electrical machines
GB/T 2900.33, Electrotechnical terminology - Power electronics
GB/T 18488.1-2015, Drive motor system for electric vehicles - Part 1.
Specification
GB/T 18488.2-2015, Drive motor system for electric vehicles - Part 2. Test
method
GB/T 19596, Terminology of electric vehicles
GB/T 29307, The Reliability Test Methods of Drive Motor System for Electric
Vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
2900.25, GB/T 2900.33, GB/T 18488.1-2015 and GB/T 19596 as well as the
followings apply.
of them have been subject to the type inspection) at specified speed and
permanent magnet temperature
4 Technical requirements
4.1 General
The drive motor system shall meet the requirements of GB/T 18488.1-2015 and
the followings.
4.2 Initial position angle
When the drive motor is equipped with a position sensor, the relative angular
relationship between the phase of the back electromotive force waveform of the
drive motor and the phase of the waveform fed back by the position sensor shall
comply with the requirements of the product technical documents.
4.3 Maximum limit of no-load back electromotive force
The back electromotive force of the drive motor at the maximum operating
speed shall not be greater than the specified value of the product technical
documentation.
4.4 Tolerance of no-load back electromotive force
The deviation between the back electromotive force and the typical value at
rated speed shall not exceed ±5% between the drive motors of the same
specification and model.
4.5 Cogging torque
The cogging torque shall not exceed the value specified in the product
specification.
4.6 Torque ripple
The torque ripple shall not exceed the value specified in the product
specification.
4.7 No-load loss of drive motor system
The no-load loss of drive motor system shall not exceed the value specified in
the product specification.
4.8 No-load loss of motor
The no-load loss of motor shall not exceed the value specified in the product
specification.
The test is performed under the actual cold condition and the ambient
temperature during the test must be recorded.
Drag the drive motor to rated speed and measure back electromotive force.
The temperature correction method is described in 5.3.
For factory inspections in mass production, the supplier and the purchaser may
agree on other methods to reflect the tolerance of no-load back electromotive
force for the inspection of this item.
5.5 Cogging torque
The test is conducted in the actual cold state.
Place the drive motor smoothly and randomly select 3 different rotor positions.
Rotate the rotor in opposite directions with torque wrench at each position.
Read and record the value of the torch wrench when the rotor starts to rotate
without continuous rotation. Take the maximum of all torque values as the
cogging torque of the drive motor.
Other test methods agreed by both parties can also be used.
NOTE The torque value measured with a torque wrench is actually the sum of the friction
torque and the cogging torque. Because the cogging torque of the motor generally accounts for
a large proportion, the measured value can be substantially equal to the cogging torque.
5.6 Torque ripple
The test is conducted in the actual cold state. When the drive motor system is
in the normal electrical connection state and under the cooling conditions
specified in the product technical documentation, the rated voltage is applied to
the DC bus.
Select several points evenly on the circumference. Fix the rotor at each rotor
position. The controller applies a specified torque command. Test locked-rotor
torque separately. The difference between the maximum and minimum values
in the test value is the torque ripple.
The number of test points and the torque command value are agreed upon by
both parties. Recommended to use peak torque, rated torque, 10% peak torque
as torque command.
Other test methods agreed by both parties can also be used.
NOTE This method is only an approximate measurement method for torque ripple in non-
weak magnetic regions, and does not consider the effect of rotation-induced position sensor
feedback angle error.
5.7 No-load loss of drive motor system
The test is conducted in the actual cold state. When the drive motor system is
under normal electrical connection and cooling conditions specified in the
product technical documentation, the rated voltage is applied on the DC bus
and the drive motor shaft is not connected to the load.
Evenly take at least 5 speed points within the speed range, including the
maximum operating speed. Measure DC bus current, voltage and losses at
these speed points.
After the test draw the relationship curve between loss and speed.
5.8 No-load loss of motor
The test is conducted in the actual cold state.
Drag the drive motor to the specified speed. Record the torque, speed and
power of the torque and speed sensor. The power value is the no-load loss of
the drive motor at this speed. Evenly take at least 5 speed points within the
speed range, including the maximum operating speed.
After the test draw the relationship curve between loss and speed.
5.9 Steady-state short-circuit current limit
The test is conducted in ......
Related standard:   QC/T 1059-2017  QC/T 1060-2017
   
 
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