CN2164142Y

CN2164142Y - Electromagnetic speed-regulating motor

Info

Publication number: CN2164142Y
Application number: CN 93240161
Authority: CN
Inventors: 张文利; 王建中; 郭学鸿
Original assignee: TIANJIN NUMERICAL CONTROL AND TRANSMISSION TECHNOLOGY APPLICATION INSTITUTE
Current assignee: TIANJIN NUMERICAL CONTROL AND TRANSMISSION TECHNOLOGY APPLICATION INSTITUTE
Priority date: 1993-09-29
Filing date: 1993-09-29
Publication date: 1994-05-04
Anticipated expiration: 2003-09-29

Abstract

The utility model relates to an electromagnetic speed-regulating motor with a groove-free cage type low-resistance armature. The utility model is characterized in that the inner surface and the two end surfaces of a groove-free cylindric armature are all coated with copper coated layers, the outer surface is coated with multi-strip-shaped copper coated layers, and the number of the multi-strip-shaped copper coated layers is corresponding to the number of magnetic poles; all the copper coated layers form a cage type structure conducting layer on the surface of the armature. Compared with copper end ring low-resistance armatures, the groove-free cage type low-resistance armature which is be used on an electromagnetic speed-regulating motor has the advantages that the processing is easy, the cost can be reduced by from 4 to 6 times, and accordingly, the energy saving effects of the motor can be improved by from 4% to 6%.

Description

Electromagnetic speed-regulating motor

The utility model relates to a kind of electromagnetic varispeed motor that has slot-less cage modle low resistance armature.

Electromagnetic varispeed motor mainly is made of tachogenerator, magnetic conductor, magnetic pole, armature, excitation winding and threephase asynchronous.Characteristics such as power controlling is little because it has, staring torque is big, speed-regulating range width, become an important member in the various stepless speed-regulating motors " family ", as a kind of interchange " infinitely variable speeds " drive controlling element, be widely used in each industrial department.All adopt the low resistance armature at present both at home and abroad, so that electromagnetic varispeed motor has energy-saving effect preferably.In the prior art, successful low resistance armature has four kinds: copper end ring low resistance armature, powder metallurgy armature, Copper Foil armature and slot type cage modle (cast aluminium) low resistance armature is arranged.Yet above-mentioned several low resistance armature all also exists complex structure, and difficulty of processing is bigger, so the manufacturing cost of armature is higher.

The purpose of this utility model is to overcome the deficiency of known technology and a kind of electromagnetic varispeed motor that has slot-less cage type low resistance armature is provided.

The utility model is realized by following technical measures: all apposition copper plates, outer surface apposition and corresponding 6 to the 12 strip-type copper plates of magnetic pole number of poles on the inner surface of slotless cylindrical shape armature and two end faces, all copper plates make it become a kind of slot-less cage modle low resistance armature at the conductive layer of a cagelike structure of armature surface formation.

The utlity model has following advantage and good effect: owing to adopt slot-less cagelike structure low resistance armature, its need not to slot cast aluminium forming or change powdered metallurgical material and technology, also need not to increase copper end ring or Copper Foil crimping, so its processing is simple, manufacturing cost can reduce significantly, and can improve the electromagnetic performance of motor, has reduced the eddy current loss of armature, improve the speed adjustable range of motor, have good practical value.

The utility model has following accompanying drawing:

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is the front view of armature among Fig. 1;

Fig. 3 is the sectional view that cuts open of Fig. 2.

The utility model passes through following examples, and is described in detail in conjunction with the accompanying drawings:

In accompanying drawing 1, tachogenerator 1 and the coaxial installation of output shaft, its output voltage is directly proportional with rotating speed, as a kind of correcting element in the governing system; On magnetic conductor 2, fix a magnetic pole winding 5, produce fixed magnetic field, when changing DC excitation electric current big or small, just can regulate the output speed of motor; Magnetic pole 3 is two claw-shaped wheels, intersection forms mutually, exports torque as driven rotor, and armature 4 is a power rotor, it has magnetic conduction, electric action concurrently, directly drag rotation by threephase asynchronous 6, in when operation, in the armature with induced potential and produce eddy current, for limiting eddy current and helping conduction current, improve electromagnetic performance, generally all adopt the low resistance armature, to reach energy-conservation.

Embodiment of the present utility model is on the electromagnetic varispeed motor of the YCT132--4 utmost point and the YCT280--4 utmost point, adopts Fig. 2 and slot-less cage modle copper plate 7 low resistance armatures 4 shown in Figure 3.Performance shows that it can reduce by 4 to 6 times than the cost of copper end ring low resistance armature; Because cage modle copper plate 7 is thin and resistivity but also little not only, electric current is evenly distributed at the armature inner surface, reduce the eddy current loss of armature, limited eddy-current heating, improved the electromagnetic performance of this motor, can make the maximum amount of its motor decide rotating speed raising 4% to 6%, in use, energy-saving effect can increase by 4% to 6%, has good practical value and social benefit.Therefore, this electromagnetic varispeed motor can be used in the occasion of constant-torque stepless speed-regulating widely, is particularly useful for the torque load(ing) machineries that successively decrease such as blower fan, water pump, and its energy-saving effect is better.

Claims

1, a kind of electromagnetic varispeed motor that has slot-less cage modle low resistance armature, it mainly is made up of tachogenerator, magnetic conductor, armature, excitation winding and threephase asynchronous, it is characterized in that on the inner surface of slotless cylindrical shape armature and two end faces all apposition copper plates, outer surface apposition and corresponding 6 to the 12 strip-type copper plates of magnetic pole number of poles, all copper plates make it become a kind of slot-less cage modle low resistance armature at the conductive layer of a cagelike structure of armature surface formation.