Magnetic pole surface loss measuring device of variable-speed power generation motor

Abstract

The invention discloses a magnetic pole surface loss measuring device of a variable-speed power generation motor, belongs to the field of motors, and aims to solve the problem in measuring the magnetic pole surface loss of a rotor of the variable-speed power generation motor. The device comprises m temperature sensing elements, n ultrasonic temperature sensors, a magnetic pole surface loss collector and an upper computer, wherein the m temperature sensing elements are uniformly embedded among different strands of rotor windings, and are used for detecting the temperatures of the windings; them temperature sensing elements send detected temperature signals to the magnetic pole surface loss collector in a wired mode; the n ultrasonic temperature sensors are uniformly attached to the outer surfaces of magnetic poles of the rotor, and are used for detecting the temperatures of the surfaces of the magnetic poles of the rotor; the n ultrasonic temperature sensors send detected temperature signals to the magnetic pole surface loss collector in a wireless mode; the magnetic pole surface loss collector collects two kinds of the temperature signals according to instructions issued by the upper computer; and the magnetic pole surface loss collector acquires magnetic pole surface loss data according to two kinds of temperature data and uploads the magnetic pole surface loss data to the upper computer.

Description

technical field [0001] The invention belongs to the field of motors, and relates to motor temperature measurement technology. Background technique [0002] With the vigorous development of the hydropower industry, variable-speed generator-motor units continue to emerge. Compared with conventional hydro-generator units, the operating conditions of variable-speed generator-motor units are much more complicated. This is due to the fact that the unit not only operates in power generation conditions, but also operates in pumping conditions. Due to the relatively large air gap of the conventional hydro-generator set, the heat loss of the rotor is not obvious, and has no impact on the safety of the unit. However, the variable-speed generator motor adopts a hidden pole structure, and the AC excitation of the stator and rotor will cause heat loss on the surface of the rotor. And because the air gap is relatively small, the heat dissipation is not good. There are many rotor burrs ca...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of measuring the magnetic pole surface loss of the variable speed generator motor rotor, and to provide a magnetic pole surface loss measurement device for the variable speed generator motor

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