Stator temperature sensor consistency detection method of permanent magnet synchronous motor of new energy vehicle
A technology for permanent magnet synchronous motors and new energy vehicles. It is applied to thermometers, thermometers and instruments that use directly heat-sensitive electric/magnetic components. It can solve the uneven process level and quality management, and it is difficult to ensure product accuracy. and consistency, product consistency is difficult to guarantee and other issues, to achieve the effect of ensuring compliance, ensuring product life, and improving product quality
Active Publication Date: 2017-10-20
HEFEI JUYI POWER SYST CO LTD
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Problems solved by technology
[0003] Existing test methods mainly rely on the manufacturing process level of the stator manufacturer and reasonable quality management to ensure temperature accuracy and consistency. However, new energy vehicles are currently in their infancy, and the process level and quality management of stator manufacturers are uneven. , it is difficult to ensure the accuracy and consistency of products, the same manufacturer will also produce products with poor consistency, and it is even more difficult to guarantee the consistency of products from different manufacturers
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[0023] Such as figure 1 As shown, the new energy vehicle permanent magnet synchronous motor stator temperature sensor consistency detection method of the present invention adopts a detection structure comprising: a regulated DC power supply 1, a motor under test 2, a stator temperature collector 3, and an ambient temperature collector 4 , the temperature coupling calculation module 5 and the result evaluation module 6 . Each of the above-mentioned signal acquisition modules, according to figure 1 The schematic diagram is connected, and the final system evaluation is used to judge whether it is qualified or not.
[0024] The DC power supply described above requires a power supply with relatively small internal resistance and relatively high output power. At present, the internal resistance of the common power supply is relatively large, and the power supply is easy to burn out during the test process, so the selection of the power supply is very important.
[0025] The temp...
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The invention discloses a stator temperature sensor consistency detection method of a permanent magnet synchronous motor of a new energy vehicle. The method comprises: certain currents are inputted into an A phase, a B phase, and a C phase of a permanent magnet synchronous motor; after motor balancing, a stator temperature and an ambient temperature are collected and the collected temperatures are inputted into a coupling calculator; the coupling calculator looks up a table to determine an equivalent temperature based on the inputted stator temperature and ambient temperature; and then a determination system determines whether the equivalent temperature meets the standard. According to the invention, on the basis of the influence on detection and the winding temperature rise by inputting of same copper losses, the ambient temperature test signal is considered and an open-circuit detection system is formed by combining standards of the enterprise. After testing, the qualification of the temperature sensor and the temperature measurement accuracy and consistency of the product can be guaranteed; the product quality is improved and the long service life and high safety of the product can be ensured.
Description
technical field [0001] The invention relates to the current new energy vehicles, in particular to a method for detecting the consistency of a stator temperature sensor of a permanent magnet synchronous motor. Background technique [0002] At present, new energy vehicle motors are gradually tending to high power density and high speed, and the problem of motor temperature rise is gradually becoming prominent. The temperature of each component of the motor is related to the life and safety of the product. Therefore, it is particularly important to monitor the temperature of the motor and the accuracy and consistency of the temperature value at all times. It is necessary to test the accuracy and consistency of the temperature conveniently, quickly and accurately. At present, there is no The specific test equipment and methods only rely on the experience of the manufacturer, so innovations in test methods and equipment are required. [0003] Existing test methods mainly rely on...
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IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 刘蕾孙纯哲田旭
Owner HEFEI JUYI POWER SYST CO LTD