New energy motor test method based on temperature curve transformation

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By simulating the operation of new energy motors under different environmental conditions and adopting the test method of temperature curve transformation, the existing technology cannot effectively test the performance problems of the instantaneous temperature rise of the motor and various usage environments, achieving more accurate and reliable test results.

CN119395541APending Publication Date: 2025-02-07ENYI AUTOMOTIVE TECH (SUZHOU) CO LTD

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Patent Information

Application Number: CN202411437425.9
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-10-15
Publication Date: 2025-02-07

AI Technical Summary

Technical Problem

The existing new energy motor testing methods cannot effectively test the performance of the motor in instantaneous temperature rise and various usage environments, resulting in inaccurate testing.

Method used

The temperature curve conversion test method is used to simulate the operation of the new energy motor under different environmental conditions, including instantaneous heating at the initial start, normal high-speed driving, deceleration driving, instantaneous acceleration and normal driving after acceleration, respectively, and the motor beating degree is tested.

Benefits of technology

By simulating various usage environments, the performance of new energy motors can be comprehensively tested, the accuracy and reliability of the test can be improved, and the normal operation of the motors under various circumstances.

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Abstract

The invention discloses a new energy motor test method based on temperature curve transformation, and the method comprises the steps: loading a new energy motor to a test bench, setting an environment control box corresponding to the new energy motor, and controlling the initial environment temperature; the new energy motor rotates to a rated rotating speed, the temperature in the environment control box is synchronously increased to 75-85 DEG C within 1-2 s, the temperature is kept for 2-3 s, simulation initial starting instant temperature rise is formed, and the rotating runout degree A of the motor is obtained through testing; reducing the temperature to 35-40 DEG C within 4-5 seconds, reaching a rated rotating speed, continuing for 2 hours to form simulated normal high-speed driving, and testing to obtain a motor run-out degree B; keeping 35-40 DEG C and 45-60% rated rotating speed for 10-15 seconds to form simulated decelerated driving, and testing to obtain a motor run-out degree C; the temperature is raised to 60-75 DEG C within 3-5 s, the rated rotating speed is 110-120%, simulated instantaneous acceleration is formed, and the motor runout degree D is obtained through testing; within 10-15 seconds, cooling to 25-35 DEG C, rotating the new energy motor to a rated rotating speed for 20-30 minutes, and after simulation acceleration is formed, running normally to obtain a motor runout degree E; and carrying out qualification judgment.

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Description

Technical Field

[0001] The present invention relates to new energy vehicle testing technology, and in particular to new energy motor testing, and specifically to a new energy motor testing method with temperature curve transformation. Background Art

[0002] New energy motors work after being connected to the power supply. During operation, the fan cools down the motor by dissipating heat. When the new energy vehicle starts, the new energy motor directly rotates at high speed, causing an instantaneous temperature rise. The motor temperature reaches 80°C, and when accelerating suddenly, the motor's rotation speed increases instantly, causing an instantaneous temperature rise problem. At this stage, new energy motor testing mainly focuses on speed stability testing of the motor at room or low temperatures. There is no test for instantaneous temperature rise, and it is impossible to reliably test the performance of new energy motors.

[0003] Therefore, it is necessary to provide a new energy motor testing method with temperature curve transformation. Summary of the invention

[0004] The purpose of the present invention is to provide a new energy motor testing method with temperature curve transformation.

[0005] The present invention achieves the above object through the following technical solutions:

[0006] A temperature curve conversion new energy motor testing method, the steps comprising:

[0007] 1) The new energy motor is loaded onto the test bench, and an environmental control box is set up corresponding to the new energy motor to control the initial ambient temperature;

[0008] 2) The new energy motor rotates to the rated speed, and the temperature in the environmental control box is simultaneously raised to 75-85°C within 1-2 seconds, and maintained for 2-3 seconds, forming a simulated initial startup instantaneous temperature rise, and the motor rotation jitter A is obtained by testing;

[0009] 3) Cool down to 35-40°C within 4-5s, rotate the new energy motor to the rated speed for 2h to simulate normal high-speed driving, and test the motor runout degree B;

[0010] 4) Maintaining 35-40°C, the new energy motor rotates to 45-60% of the rated speed for 10-15 seconds to simulate deceleration driving and test the motor runout C;

[0011] 5) The temperature rises to 60-75°C within 3-5s, and the new energy motor rotates to 110-120% of the rated speed to simulate instantaneous speed increase, and the motor runout degree D is obtained by testing;

[0012] 6) Within 10-15 seconds, the temperature is reduced to 25-35°C, and the new energy motor rotates to the rated speed for 20-30 minutes to form a simulated acceleration, and then drive normally to obtain the motor runout E;

[0013] 7) Make qualified judgment, including: A is greater than 1.1-1.3 times the qualified runout, it is judged as unqualified; B is greater than the qualified runout, it is unqualified.

[0014] Furthermore, step 7) also includes: if C is greater than the qualified run-out, it is judged as unqualified; if D is greater than 1.3-1.4 times the qualified run-out, it is judged as unqualified.

[0015] Furthermore, step 7) also includes: if E is greater than the motor vibration degree, it is judged as unqualified.

[0016] Furthermore, the simulation average parameter setting is performed, where A accounts for 10-15%, B accounts for 30-40%, C accounts for 10-15%, D accounts for 10-15%, and E accounts for 20-30%;

[0017] 10-15%A+30-40%B+10-15%C+10-15%D+20-30%D>1.1 times the qualified runout, which is judged as unqualified.

[0018] Furthermore, in step 1), the initial ambient temperature is 23°C, which can fluctuate up or down by 5°C.

[0019] Furthermore, the humidity in the environmental control box is not higher than 45%.

[0020] Furthermore, in step 3), the rotation speed is not less than 4502 rpm, and the torque is not less than 312 NM.

[0021] Furthermore, in step 5), the rotation speed is not less than 5533 rpm and the torque is not more than 125 NM.

[0022] Further, in step 2), step 4), and step 6), the torque is 213-312NM.

[0023] Compared with the prior art, the present invention can ensure the testing of new energy motors in various usage environments and ensure the accuracy of new energy motor testing by simulating instantaneous acceleration environment, normal driving environment, deceleration driving environment, and instantaneous high-speed and high-temperature environment during startup. DETAILED DESCRIPTION

[0024] Embodiment 1:

[0025] A temperature curve conversion new energy motor testing method, the steps comprising:

[0026] 1) The new energy motor is loaded onto the test bench, and an environmental control box is set up corresponding to the new energy motor to control the initial ambient temperature;

[0027] 2) The new energy motor rotates to the rated speed, and the temperature in the environmental control box is simultaneously raised to 75°C within 1-2 seconds and maintained for 2 seconds, forming a simulated initial startup instantaneous temperature rise, and the motor rotation jitter A is obtained by testing;

[0028] 3) The temperature is lowered to 35°C within 4 seconds, and the new energy motor rotates to the rated speed for 2 hours to simulate normal high-speed driving, and the motor runout degree B is obtained by testing;

[0029] 4) Maintaining 35°C, the new energy motor rotates to 4% of the rated speed for 10 seconds to simulate deceleration driving, and the motor runout degree C is obtained by testing;

[0030] 5) The temperature is raised to 60°C within 3 seconds, and the new energy motor rotates to 110% of the rated speed to simulate instantaneous speed increase, and the motor runout degree D is obtained by testing;

[0031] 6) Within 10 seconds, the temperature is lowered to 25°C, and the new energy motor rotates to the rated speed for 20 minutes to form a simulated acceleration, and then drives normally to obtain the motor runout E;

[0032] 7) Make qualified judgment, including: A is greater than 1.1 times the qualified runout, it is judged as unqualified; B is greater than the qualified runout, it is judged as unqualified.

[0033] Step 7) also includes: if C is greater than the qualified run-out degree, it is judged as unqualified; if D is greater than 1.3 times the qualified run-out degree, it is judged as unqualified.

[0034] Step 7) also includes: if E is greater than the motor's vibration degree, it is judged as unqualified.

[0035] Perform simulation average parameter setting, where A accounts for 10-15%, B accounts for 30-40%, C accounts for 10-15%, D accounts for 10-15%, and E accounts for 20-30%;

[0036] 10-15%A+30-40%B+10-15%C+10-15%D+20-30%D>1.1 times the qualified runout, which is judged as unqualified.

[0037] In step 1), the initial ambient temperature is 23°C, which can fluctuate up or down by 5°C.

[0038] In the environmental control box, the humidity is not higher than 45%.

[0039] In step 3), the rotation speed is not less than 4502rpm and the torque is not less than 312NM.

[0040] In step 5), the rotation speed is not less than 5533 rpm and the torque is not more than 125 NM.

[0041] Step 2), step 4), step 6), the torque is 213-312NM.

[0042] Embodiment 2:

[0043] A temperature curve conversion new energy motor testing method, the steps comprising:

[0044] 1) The new energy motor is loaded onto the test bench, and an environmental control box is set up corresponding to the new energy motor to control the initial ambient temperature;

[0045] 2) The new energy motor rotates to the rated speed, and the temperature in the environmental control box is simultaneously raised to 85°C within 1-2 seconds and maintained for 3 seconds, forming a simulated initial startup instantaneous temperature rise, and the motor rotation jitter A is obtained by testing;

[0046] 3) The temperature is lowered to 40°C within 5 seconds, and the new energy motor rotates to the rated speed for 2 hours to simulate normal high-speed driving, and the motor runout degree B is obtained by testing;

[0047] 4) Maintaining 40°C, the new energy motor rotates to 45-60% of the rated speed for 15 seconds to simulate deceleration driving, and the motor runout degree C is obtained by testing;

[0048] 5) The temperature is raised to 75°C within 5 seconds, and the new energy motor rotates to 120% of the rated speed to simulate instantaneous speed increase, and the motor runout degree D is obtained by testing;

[0049] 6) Within 15 seconds, the temperature is lowered to 35°C, and the new energy motor rotates to the rated speed for 20-30 minutes to form a simulated acceleration, and then drives normally to obtain the motor runout E;

[0050] 7) Make qualified judgment, including: A is greater than 1.3 times the qualified runout, it is judged as unqualified; B is greater than the qualified runout, it is judged as unqualified.

[0051] Step 7) also includes: if C is greater than the qualified run-out, it is judged as unqualified; if D is greater than 1.4 times the qualified run-out, it is judged as unqualified.

[0052] Step 7) also includes: if E is greater than the motor's vibration degree, it is judged as unqualified.

[0053] Perform simulation average parameter setting, where A accounts for 10-15%, B accounts for 30-40%, C accounts for 10-15%, D accounts for 10-15%, and E accounts for 20-30%;

[0054] 10-15%A+30-40%B+10-15%C+10-15%D+20-30%D>1.1 times the qualified runout, which is judged as unqualified.

[0055] In step 1), the initial ambient temperature is 23°C, which can fluctuate up or down by 5°C.

[0056] In the environmental control box, the humidity is not higher than 45%.

[0057] In step 3), the rotation speed is not less than 4502rpm and the torque is not less than 312NM.

[0058] In step 5), the rotation speed is not less than 5533 rpm and the torque is not more than 125 NM.

[0059] Step 2), step 4), step 6), the torque is 213-312NM.

[0060] Embodiment 3:

[0061] A temperature curve conversion new energy motor testing method, the steps comprising:

[0062] 1) The new energy motor is loaded onto the test bench, and an environmental control box is set up corresponding to the new energy motor to control the initial ambient temperature;

[0063] 2) The new energy motor rotates to the rated speed, and the temperature in the environmental control box is simultaneously raised to 80°C within 1-2 seconds and maintained for 3 seconds, forming a simulated initial startup instantaneous temperature rise, and the motor rotation jitter A is obtained by testing;

[0064] 3) The temperature is lowered to 38°C within 5 seconds, and the new energy motor rotates to the rated speed for 2 hours to simulate normal high-speed driving, and the motor runout degree B is obtained by testing;

[0065] 4) Maintaining 38°C, the new energy motor rotates to 55% of the rated speed for 13 seconds to simulate deceleration driving, and the motor runout degree C is obtained by testing;

[0066] 5) The temperature rises to 67°C within 4 seconds, and the new energy motor rotates to 115% of the rated speed, forming a simulated instantaneous speed increase, and the motor runout degree D is obtained by testing;

[0067] 6) Within 13 seconds, the temperature is lowered to 30°C, and the new energy motor rotates to the rated speed for 25 minutes to form a simulated acceleration, and then drives normally to obtain the motor runout E;

[0068] 7) Make qualified judgment, including: A is greater than 1.2 times the qualified runout, it is judged as unqualified; B is greater than the qualified runout, it is judged as unqualified.

[0069] Step 7) also includes: if C is greater than the qualified run-out, it is judged as unqualified; if D is greater than 1.35 times the qualified run-out, it is judged as unqualified.

[0070] Step 7) also includes: if E is greater than the motor's vibration degree, it is judged as unqualified.

[0071] Perform simulation average parameter setting, where A accounts for 10-15%, B accounts for 30-40%, C accounts for 10-15%, D accounts for 10-15%, and E accounts for 20-30%;

[0072] 10-15%A+30-40%B+10-15%C+10-15%D+20-30%D>1.1 times the qualified runout, which is judged as unqualified.

[0073] In step 1), the initial ambient temperature is 23°C, which can fluctuate up or down by 5°C.

[0074] In the environmental control box, the humidity is not higher than 45%.

[0075] In step 3), the rotation speed is not less than 4502rpm and the torque is not less than 312NM.

[0076] In step 5), the rotation speed is not less than 5533 rpm and the torque is not more than 125 NM.

[0077] Step 2), step 4), step 6), the torque is 213-312NM.

[0078] Compared with the prior art, the present invention can ensure the testing of new energy motors in various usage environments and ensure the accuracy of new energy motor testing by simulating instantaneous acceleration environment, normal driving environment, deceleration driving environment, and instantaneous high-speed and high-temperature environment during startup.

[0079] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A temperature curve conversion new energy motor testing method, characterized in that: Step include: 1) The new energy motor is loaded onto the test bench, and an environmental control box is set up corresponding to the new energy motor to control the initial ambient temperature; 2) The new energy motor rotates to the rated speed, and the temperature in the environmental control box is simultaneously raised to 75-85°C within 1-2 seconds, and maintained for 2-3 seconds, forming a simulated initial startup instantaneous temperature rise, and the motor rotation jitter A is obtained by testing; 3) Cool down to 35-40°C within 4-5s, rotate the new energy motor to the rated speed for 2h to simulate normal high-speed driving, and test the motor runout degree B; 4) Maintaining 35-40°C, the new energy motor rotates to 45-60% of the rated speed for 10-15 seconds to simulate deceleration driving and test the motor runout C; 5) The temperature rises to 60-75°C within 3-5s, and the new energy motor rotates to 110-120% of the rated speed to simulate instantaneous speed increase, and the motor runout degree D is obtained by testing; 6) Within 10-15 seconds, the temperature is lowered to 25-35°C, and the new energy motor rotates to the rated speed for 20-30 minutes to form a simulated acceleration, and then drives normally to obtain the motor runout E; 7) Make qualified judgment, including: if A is greater than 1.1-1.3 times the qualified runout, it is judged as unqualified; If B is greater than the qualified runout, it is unqualified.

2. A temperature curve conversion new energy motor testing method according to claim 1, characterized in that: Step 7) also includes: if C is greater than the qualified run-out, it is judged as unqualified; if D is greater than 1.3-1.4 times the qualified run-out, it is judged as unqualified.

3. A temperature curve conversion new energy motor testing method according to claim 2, characterized in that: Step 7) also includes: if E is greater than the motor runout, it is judged as unqualified.

4. A temperature curve conversion new energy motor testing method according to claim 3, characterized in that: Perform simulation average parameter setting, where A accounts for 10-15%, B accounts for 30-40%, C accounts for 10-15%, D accounts for 10-15%, and E accounts for 20-30%; 10-15%A+30-40%B+10-15%C+10-15%D+20-30%D>1.1 times the qualified runout, which is judged as unqualified.

5. A temperature curve conversion new energy motor testing method according to claim 4, characterized in that: In step 1), the initial ambient temperature is 23°C, which can fluctuate up or down by 5°C.

6. A temperature curve conversion new energy motor testing method according to claim 5, characterized in that: In the environmental control box, the humidity is not higher than 45%.

7. A temperature curve conversion new energy motor testing method according to claim 6, characterized in that: In step 3), the rotation speed is not less than 4502rpm and the torque is not less than 312NM.

8. The method for testing a new energy motor with temperature curve conversion according to claim 7 is characterized in that: In step 5), the rotation speed is not less than 5533 rpm and the torque is not more than 125 NM.

9. A temperature curve conversion new energy motor testing method according to claim 8, characterized in that: Step 2), step 4), step 6), the torque is 213-312NM.