Medium-high voltage motor dielectric loss intelligent test device

Abstract

The invention relates to a medium-high voltage motor dielectric loss intelligent test device, which comprises an alternating current power supply, a test object, a side connection sampling module, a gain automatic adjustment module, a synchronous acquisition module, an isolation module and an upper computer which are connected in sequence, and is characterized in that the side connection sampling module is used for acquiring the sampling voltage of the test object; the gain automatic adjustment module is used for amplifying a sample sampling voltage signal; the synchronous acquisition module is used for realizing simultaneous acquisition of multi-channel signals; the isolation module is used for isolating analog signals and digital signals; the upper computer is used for calculating the dielectric loss value of the test object by executing a sine parameter algorithm, through voltage tracking, outputting a measurement control signal, through data fitting, obtaining calibration parameters, and correcting the measurement initial value, setting an output amplification factor control signal, and displaying the measurement result and the waveform. Compared with the prior art, the medium-high voltage motor dielectric loss intelligent test device can perform automatic and efficient dielectric loss testing on the medium-high voltage motor, and can improve the anti-interference capability and the measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of motor dielectric loss testing, in particular to an intelligent testing device for medium and high voltage motor dielectric loss. Background technique [0002] For motor products, insulating paper, insulating varnish, insulating layer of electromagnetic wire, high-voltage motor coil outsourcing mica tape, high-resistance band, low-resistance band, lead wire insulation and air are all related dielectrics, and the dielectric is under the action of an external electric field. , there will be heating phenomenon inside, which means that part of the electric energy has been converted into heat energy and dissipated. Under the action of the electric field, the energy consumed by the dielectric in a unit time due to heat is called the loss power of the dielectric, or simply referred to as dielectric loss. [0003] The dielectric loss of the motor is related to the running state and service life of the motor. In th...

AI Technical Summary

Problems solved by technology

Some dielectric loss meters even weigh hundreds of kilograms, which makes the transportation and measurement of dielectric loss meters not convenient enough

In addition, most dielectric loss meters only have simple anti-interference ability, once in a serious interference environment, the measurement error will inevitably exceed the allowable range

[0006] At present, there are very few dielectric loss testers specially designed for medium and high voltage motors in the market, so the general-purpose dielectric loss testers are used for on-site testing of motors

However, the motor often needs to be tested to obtain the dielectric loss value under multiple voltages. Using a general-purpose dielectric loss tester requires repeated voltage adjustments, and the process of waiting for the measurement results makes the entire testing process very cumbersome and time-consuming.

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