Single-phase capacitor-operated motor

Abstract

The invention provides a single-phase capacitor-operated motor, comprising a motor shaft, a rotor, a stator, a front end cover and a rear end cover; wherein, the rotor is sheathed on the motor shaft and the stator is sheathed at the outer side of the rotor; mutually snap-fit front end cover and rear end cover are arranged at the outer side of the stator; the two ends of the motor shaft are installed on the front end cover and rear end cover via bearings; a stator core of the stator is provided with double-row grooves including a deep-row groove and a shallow-row groove; stator winding is concentrated winding comprising first winding and second winding; coils of the first winding and the second winding are respectively wound in the deep-row groove and the shallow-row groove of the stator core; the adjacent coils of the first winding, which are wound in the deep-row groove, are wound forward and reverse; the adjacent coils of the second winding, which are wound in the shallow-row groove, are wound forward and reverse; the first winding is in parallel connection with the second winding after series connection with capacitance or the second winding is in parallel connection with the first winding after series connection with capacitance. The single-phase capacitor-operated motor can save wires by about 20%; motors with thin iron core and large winding span witness more obvious saving of copper content for windings; in addition, the winding shortens the axial length of the motor; manufacturing of the stator winding achieves machine winding, simplifies the processing flows and improves the production efficiency of the stator; besides, the concentrated stator winding adopted by the invention has high coefficient and good motor property and is suitable for motors with different poles and power.

Description

technical field [0001] The invention relates to a single-phase capacitor-operated motor, in particular to a single-phase capacitor-operated motor with concentrated windings, which belongs to the invention technology of stator punching of the single-phase capacitor-operated motor. Background technique [0002] AC motors, especially AC motors for fans, generally use ordinary single-phase capacitor-operated asynchronous motors, and ordinary single-phase capacitor-operated asynchronous motors usually use distributed windings, such as Figure 4 As shown: both sides of the coils of the first winding 41 and the second winding 42 cross a certain number of stator slots and are embedded in two non-adjacent stator slots 431. Since the stator slots 431 are distributed on the same circumference, or the slots The depth of the bottom is equal, in order to meet the requirement that the first winding 41 and the second winding 42 have enough avoidance space at the position of the notch of the ...

AI Technical Summary

Problems solved by technology

For the motor, the winding coil end not only consumes copper, but also consumes electric energy, which affects the efficiency of the motor. Therefore, how to minimize the winding coil end and improve the actual utilization of the winding coil without deteriorating the performance of the motor is a research breakthrough. direction

[0003] In addition, because the concentrated winding motor is relatively flat, the axial dimension is shortened, and the height of the motor end cover is shortened, which can save materials and greatly save the installation space of the motor. There are common single-phase capacitor-operated asynchronous motors with concentrated windings on the market, such as Figure 5 As shown, the motor adopts a slotted stator core 53, and the groove depth and area of ​​the slotted stator core 53 are the same, and the first winding 51 and the second winding 52 are wound on a stator tooth and connected to each other with coils separated from each other. The problem is that the winding distribution coefficient is low, the cogging torque pulsation is large, the electromagnetic torque pulsation is also large, the motor efficiency is low, and the performance will deteriorate. It is only suitable for motors with a small number of poles and low power.

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