Six-phase alternating-current motor variable-frequency speed regulation system and use method thereof

Abstract

The invention discloses a six-phase alternating current motor frequency conversion speed regulation system and a use method thereof, the structure comprises a six-phase alternating current motor, a frequency converter, a capacitor protection mechanism, a rotor, a base, a cooling fan and a dust cover, a capacitor reduces vibration and impact from the six-phase alternating current motor through a damping spring, and the capacitor is prevented from being heated due to vibration friction, and the instability of an electrolyte in the capacitor can be reduced; the conductive end of the capacitor is installed in a sealed mode through a movable cover, the situation that the capacitor is affected with damp is avoided, contact between a port of the capacitor and air is reduced, the six-phase alternating current motor introduces wind power generated by a cooling fan into a capacitor anti-collision frame through an air guide pipe, the capacitor is cooled, the lower the temperature rise of the capacitor is, the slower the loss is, the longer the service life is, the dust cover filters outside air entering the six-phase alternating-current motor through the water absorption mechanism, and the safety of the six-phase alternating-current motor is improved.

Description

[0001] This application is a divisional application with the application date of April 7, 2020 and the application number CN202010266903.X, whose invention name is a six-phase AC motor frequency conversion speed regulation system. technical field [0002] The invention relates to the field of AC frequency conversion capacitors, in particular to a six-phase AC motor frequency conversion and speed regulation system and a use method thereof. Background technique [0003] Compared with conventional three-phase AC motors, six-phase AC motors have smaller output torque ripple and higher device reliability, and can achieve high power output under low-voltage power supply conditions, so they are very suitable for electric vehicles , ship propulsion and aerospace and other occasions. [0004] The six-phase AC motor can change the motor speed by changing the frequency of the power supply. The decrease of the frequency will lead to the increase of the magnetic flux, causing the saturat...

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Problems solved by technology

[0004] The six-phase AC motor can change the motor speed by changing the frequency of the power supply. The decrease of the frequency will lead to the increase of the magnetic flux, causing the saturation of the magnetic circuit, the increase of the excitation current, the decrease of the power factor, and the overheating of the iron core and coil. Therefore, it is necessary to use a capacitor for stable transmission. Current, long-term use, the capacitor will be subjected to the vibration of the motor when it is working, which will cause frequent internal heating, causing the electrolyte to dry up slowly, and thus fail. The outside air dissipates heat inside, and the outside air is sometimes relatively humid, which can cause damage to the motor due to water immersion.

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