Motor assembly of compressor and compressor

Abstract

The invention discloses a motor assembly of a compressor and the compressor. The motor assembly comprises a winding, protection devices and a connection terminal, wherein the winding adopts a star connection method or a delta connection method and is suitable for a three-phase power supply; and the protection devices are only arranged at a power supply side of the winding, or the protection devices are arranged at the power supply side of the winding and a neutral point side of the winding at the same time. According to the motor assembly of the compressor, the number of welding points of theprotection devices and the winding and the number of protective sleeves are reduced, and the procedures of embedding the sleeves into a solenoid, binding the protection devices and welding a suspension bracket are reduced. According to the motor assembly of the compressor, the labor cost and equipment input can be reduced, the production rhythm is improved, and meanwhile, the cost of raw materialscan be reduced; and meanwhile, automatic connection and disconnection of a three-phase motor and the power supply can also be achieved during delta connection of the winding of the three-phase motor.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a motor assembly of a compressor and the compressor. Background technique [0002] Existing hermetic compressors use specific protection methods to automatically cut off the electrical circuit of their built-in motor and power supply when abnormal conditions occur during operation; for example, single-phase hermetic compressors realize on-off by automatically cutting off the electrical circuit of public electrical lines . The three-phase hermetic compressor achieves on-off by automatically cutting off the electrical circuit on the star-shaped neutral point side. [0003] The specific implementation method for cutting off the single-phase hermetic compressor is as follows: a specially designed protection device is installed on the public electrical circuit of the main and auxiliary windings, the main and auxiliary windings are connected to the common lead wires by welding, ...

AI Technical Summary

Problems solved by technology

The protection device can be bound to the wire wrap of the motor or hung on the casing of the hermetic compressor. When the protection device is bound to the winding wire wrap, this method requires the protection device to have three lead wires, which are respectively connected to the three leads of the motor. The windings are connected; the process production method: the protection device is connected with the three windings by welding, the welding point is wrapped with a sleeve, inserted into the middle of the winding wire package, and the protection device is bound and fixed on the winding wire package with a binding wire. There are many processes, and special corresponding personnel and equipment are required; when the protection device is placed on the upper casing of the three-phase hermetic compressor by suspension, this method requires the three-phase motor to have six leads, of which the bare copper of the three independent leads The wire end is connected to the neutral point of the winding by welding, and wrapped with a sleeve and inserted into the middle of the wire package, the other end of the lead wire is plugged into the protective device suspended on the upper shell through a flag terminal, and spot welding is adopted on the upper shell In this way, a cage is placed, and the protection device is placed in the cage; this method has many processes and high cost, and in addition, too many leads will lead to wrong insertion and cause failure of the three-phase motor

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