Winding resistance automatic measuring system and measuring method thereof
An automatic measurement and winding resistance technology, applied in the direction of measuring heat, measuring electrical variables, measuring devices, etc., can solve the problems of wrong sequence, no optimization of measurement circuit, and inability to ensure switching sequence, etc., to achieve precise control of measurement time intervals , Improve the accuracy of measurement, the effect of precise measurement
Pending Publication Date: 2021-06-22
FANGGUANG INSPECTION & TESTING CO LTD
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Problems solved by technology
However, this invention can only manually switch the power line and the test circuit, and cannot ensure the switching sequence. There is a danger of making a mistake in the sequence of the two steps of disconnecting the power supply and connecting the measurement circuit, and it cannot automatically judge thermal stability and record data, and cannot control Test process without optimization of the measurement circuit
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[0028] Example: see figure 1 , the present invention provides a winding resistance automatic measurement system and its measurement method, including a power supply 1, a measurement line 2, a thermocouple 3, a first relay group 4, a second relay group 5, a third relay group 6, control and measurement Unit 7 and Load 8.
[0029] The power supply 1 is used to provide the winding 9 with the electric energy required for testing, and set the output voltage value and frequency value according to the working condition requirements of the winding 9;
[0030] The measuring line 2 is used as a wire for the control and measurement unit 7 to provide a test auxiliary current to the winding 9, and a wire for the control and measurement unit 7 to measure the voltage value on the winding 9;
[0031] The temperature measuring end of the thermocouple 3 is attached to the surface of the winding 9, and the thermocouple 3 is electrically connected to the control and measurement unit 7 for measuri...
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The invention relates to the technical field of safety test, and discloses a winding resistance automatic measurement system which comprises a power supply, a measurement line, a thermocouple, a load, a first relay group, a second relay group, a third relay group and a control and measurement unit. The invention also discloses a measuring method of the winding resistance automatic measuring system. The method comprises the following steps: S1, test preparation; s2, cold resistance is measured; s3, storing the surface temperature of the winding in a rolling manner; s4, judging whether the heating of the winding reaches a steady state or not; s5, measuring thermal resistance; and S6, ending the test. By optimizing the measurement system and intelligently judging whether the temperature of the winding enters a steady state or not, it is ensured that the steps with danger possibility in the measurement process can be safely carried out according to the correct sequence and interval, the measurement accuracy is improved, the line switching sequence is ensured, the measurement time interval is accurately controlled, and the measurement efficiency is improved. Meanwhile, accurate measurement of a small resistance value is realized.
Description
technical field [0001] The invention relates to the technical field of safety testing, in particular to a winding resistance automatic measurement system and a measurement method thereof. Background technique [0002] The temperature rise test is a basic test item in the safety inspection test. Its purpose is to check whether the temperature caused by the appliance itself and its installation and placement environment meets the requirements during use, so as to avoid temperature rise during the working process. If it is too high, it will cause danger to users and appliances. [0003] There are many ways to test the temperature rise of the winding: use an infrared thermometer to measure the temperature of each point on the surface of the winding, and it can measure where the temperature is the highest, but the infrared cannot measure the temperature outside its reach, so this method It cannot be widely used; the temperature of the winding surface can be measured with a spot ...
Claims
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Login to View More IPC IPC(8): G01R27/08G01K7/02G01K1/143G01K3/10
CPCG01R27/08G01K7/02G01K1/143G01K3/10
Inventor 张泽铭尧敏陈泽亮
Owner FANGGUANG INSPECTION & TESTING CO LTD