A device that can realize the corona resistance test of multi-channel variable frequency motor magnet wire
A technology of corona resistance test and variable frequency motor, which is applied in the direction of motor generator test, dielectric strength test, electric measurement, etc., can solve problems such as inconsistency, achieve accurate test, accurate corona resistance life, and save test time and the effect of labor costs
Active Publication Date: 2019-08-02
成都大川海沃尔电气科技有限公司
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Problems solved by technology
The remaining patterns will continue to age under the changed waveform rise time. Since the rise time is reduced, it is no longer the considered waveform rise time, so the aging life obtained will not reflect the real situation of the pattern more accurately.
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[0038] Such as Figure 1~3 As shown, what the present invention provides is a kind of equipment that can realize the corona resistance test of multi-channel variable frequency motor magnet wire, including main control system, push-pull switch logic control circuit, oscilloscope, high voltage probe, overcurrent protection sensing circuit and Test stand.
[0039] The main control system, as the logic control core of the present invention, is used to control the operation of various equipment and circuits, so as to realize the corona resistance test of the magnet wires of multi-channel variable frequency motors. The main control system includes an MCU, a human-computer interaction terminal connected to the MCU, an FPGA that communicates with the MCU using the serial port RS232 protocol and can output TTL signals, and is connected to the FPGA and a push-pull switch logic control circuit at the same time, The DA module is used to output the TTL signal to the push-pull switch logic...
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The invention discloses a device for realizing multipath variable-frequency motor magnet wire corona resistance test, so as to solve the problems that output waveforms are not standard in the prior art, and waveform rise time and fall time change along with sample breakdown in the case of parallel multipath sample aging. The device for realizing multipath variable-frequency motor magnet wire corona resistance test comprises a main control system, a push-pull switch logic control circuit, an oscilloscope, a high-voltage probe, an over current protection sensing circuit and a test frame. The device for realizing multipath variable-frequency motor magnet wire corona resistance test has the advantages that the design is scientific and reasonable; the operation is convenient; the output waveforms are in line with IEC60034-18-41 and IEC 60034-18-42 standards; the waveform rise time and the fall time do not change along with breakdown of samples one by one; and prominent substantive features and significant improvement are realized.
Description
technical field [0001] The invention relates to a test device, in particular to a device capable of realizing the corona resistance test of electromagnetic wires of multi-channel variable frequency motors. Background technique [0002] The rapid development of variable frequency drives based on pulse width modulation (PWM) technology has promoted the wide application of variable frequency motors in various industries, and variable frequency drive motors are playing an increasingly important role in the national economy. However, the insulation of variable-frequency motors is subjected to high-frequency, rapidly changing repetitive pulses, and the impact of electrical stress on insulation life is more severe than that of sinusoidal power-frequency electrical stress. A large number of variable-frequency motors are damaged before reaching the design life. Using repeated high-voltage square waves to test the insulation life of variable frequency motors and improve the insulation...
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IPC IPC(8): G01R31/12G01R31/34
CPCG01R31/1272G01R31/346
Inventor 王鹏王剑周群雷勇
Owner 成都大川海沃尔电气科技有限公司