Rare-earth permanent-magnet synchronous servo motor

Abstract

A rare-earth permanent-magnet synchronous servo motor comprises a machine base, a stator, a rotor and a rotary shaft. The stator comprises a stator iron core and a stator winding, the stator iron core is formed by stacking stator punching sheets, the stator punching sheets are provided with stator punching sheet slots, and stator windings are arranged in the stator punching sheet slots. The rotor comprises a rotor iron core and rare-earth permanent magnets, the rotor iron core is formed by stacking rotor punching sheets, eight pairs of magnetic steel slots are uniformly circumferentially distributed on yoke portions of the rotor punching sheets, each pair of magnetic steel slots are radially symmetrically arranged in V shape, and the rare-earth permanent magnets are embedded in the steel magnetic slots. The rare-earth permanent-magnet synchronous servo motor adopting the structure of V-shaped magnetic loops with short-distance windings of fractional slots has the advantages of low loss, high efficiency, large starting torque, small size, light weight, high power density and the like, has the advantage that ultraharmonics and slot effect are suppressed by means of the windings of the fractional slots, and thereby having the advantages of low torque pulsation, small positioning moment, high balance accuracy, stable running, low noise and vibration, and the like.

Description

【Technical field】 [0001] The invention relates to a three-phase synchronous motor, in particular to a rare earth permanent magnet synchronous servo motor with an embedded magnetic circuit structure. 【Background technique】 [0002] There are two types of crude oil extraction methods in oil fields: one is to use the energy of the formation itself to lift crude oil, which is called self-injection oil recovery method, which is common in some newly developed oil fields with large reserves; In the later period, the energy of the formation itself is not enough to make the crude oil self-spray, and the crude oil must be lifted to the ground by artificial use of mechanical equipment, which is called artificial lift oil recovery method or mechanical oil recovery method. [0003] The starting torque of the pumping unit motor suitable for use in the oil field is 3-4 times the actual load, or even greater, and the starting torque is the first element for selecting a motor for the pumping...

AI Technical Summary

Problems solved by technology

In order to meet the starting torque, the power of the load and the motor must not match well, and the operating load power is far less than the rated power of the motor. The efficiency of the motor is low, the power factor is low, the power consumption is large, and the energy waste is very serious.

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