CN2135868Y - Multi-power energy-saving asynchronous motor - Google Patents

Abstract

The utility model relates to a multi-power energy-saving asynchronous motor, which is characterized in that two sets of stator windings having the same number of poles are supplied with the working power supply by two junction boxes; two rotors with same directions are arranged on a same rotating shaft; the stator winding and the rotor are positioned by steps. The motor has the advantages that availability during light loading; the energy consumption can be decreased; the electrical energy and the reactive power loss can be reduced during no load; the work is normal during heavy load; the initial power is small, etc. The utility model is suitable for being used by a mechanism device with variable working load when arranged.

Description

Multi-power energy-saving asynchronous motor

The utility model relates to a kind of threephase asynchronous.Be suitable for being configured in plant equipment such as lathe, planer, slotting machine, shearing machine and the oil pumper use that operating load changes.

At present, be used for the threephase asynchronous that various plant equipment disposes, its power is constant.That is: no matter be under heavy, underloading or unloaded load state, all be to carry out work with a kind of power.When underloading or zero load,,, make waste of energy so reduced the efficient of motor because power of electric motor is far longer than the bearing power of plant equipment.In addition, when motor starting, owing to have from static to constant speed this process that turns round, at this moment the induced electromotive force maximum of rotor, the starting current in the stator winding also maximum 4-7 of rated current (be about doubly), common threephase asynchronous is because capacity is big, the starting current that is increased is also just big, so not only increase the energy loss of starting, also can cause voltage drop very big in the electrical network, influenced the normal operation of other power consumption equipment.

The purpose of this utility model is intended to overcome the shortcoming of above-mentioned prior art, and to improve the efficient and the power factor of motor, it is high-power to have designed a kind of heavy duty, underloading and unloaded small-power and the few energy-saving multi-power asynchronous motor of starting energy loss.

Feature of the present utility model is: have the identical and stator winding that work alone respectively of two groups of numbers of poles and supply with working power respectively by two terminal boxes on support, two in the same way rotor be installed in the rotating shaft, stator winding is used the step location of rotating shaft with the step location of support, rotor.Adopt the motor of this structure fabrication, when by a terminal box with power connection after, the interior space of one group of stator winding just produces rotating magnetic field, make the guidewire movement cutting magnetic line of a rotor, and rotate along the direction of rotating magnetic field with the rotating speed that is lower than rotating magnetic field, at this moment be mounted in the same rotating shaft owing to two rotors, when a rotor rotation, by rotating shaft another rotor is rotated simultaneously, because of just one group of stator winding electrifying work, the less underloading that is used for of power of electric motor this moment is used; When needs increased power, as long as pass through another terminal box with power connection, another group stator winding had also just produced rotating magnetic field, and make another rotor enter operating state, the work because two rotors are all switched on, this just makes power of electric motor increase, and satisfies the use of plant equipment heavy duty; When motor starting, owing to be one group of stator winding starting, power when having reduced starting, reduced the energy loss of starting motor relatively, when starting another group stator winding, because of two rotors have all entered the constant speed running when needs increase power, also just no longer include by static to constant speed this starting process that turns round, only need power connection is made another group stator winding work, the power of increasing motor has also just reached and has started energy-conservation effect.Thereby realized the purpose of this utility model.

The utility model is compared with present widely used threephase asynchronous, in the plant equipment of load variations, has the effective rate of utilization when improving underloading, reduce energy consumption, also can reduce the electric energy reactive loss relatively when unloaded, when heavy duty is working properly and starting power is little, has reduced the advantages such as influence to electrical network and other power consumption equipment.

Below with reference to drawings and Examples the utility model is elaborated.

Accompanying drawing is a kind of structural representation of the present utility model.

Referring to accompanying drawing: the utility model comprises support 6, end cap (1,10) and stator winding (3,8), rotor (4,9), rotating shaft 5 and terminal box (2,7).By support 6 and two end cap (1,10) form external shell, the external power supply terminal box (2 of two usefulness that are used to power is installed on housing, 7), two groups of identical and stator winding (3 that can work alone respectively of number of poles are installed in casing, 8), this stator winding (3,8) by terminal box (2,7) supply with working power respectively, and by two end cap (1,10) supporting two cage rotors (4 in the same way are being housed, 9) rotating shaft 5, and make two rotors (4,9) with two groups of stator winding (3,8) holding position unanimity in the axial direction, when mounted for determining two groups of stator winding (3,8) and two rotors (4,9) relative position in the axial direction, mid portion in rotating shaft 5 is provided with step 12, in support 6, be provided with step 11, make two rotors (4,9) two from rotating shaft 5 is respectively charged into back arrival step 12, and with two stator winding (3,8) two ends from support 6 are respectively charged into back arrival step 11, have kept two rotors (4,9) with two groups of stator winding (3,8) relative position.A motor is formed in terminal box 2, stator pack 3, rotor 4 and rotating shaft 5 among the figure; Another motor is formed in terminal box 7, stator winding 8, rotor 9 and rotating shaft 5.Described combining structure has just constituted this energy-saving multi-power asynchronous motor.

This motor is if make 5 kilowatts respectively with two stator winding, and its gross power is 10 kilowatts.When being used in reciprocating type operation (being load variations) equipment, heavy duty is all devoted oneself to work for 10 kilowatts, and underloading has only 5 kilowatts to devote oneself to work, during its underloading energy-conservation about 50%.

The utility model can not only be made threephase asynchronous, also can be made into monopole asynchronous motor; Two rotors also can adopt wound rotor; The phase mutual interference can add shielding between two stator winding when preventing work.

Claims (2)

1, a kind of support, end cap and stator winding of comprising, the energy-saving multi-power asynchronous motor of rotor, rotating shaft and terminal box, it is characterized in that: on support 6, have the identical and stator winding (3,8) that work alone respectively of two groups of numbers of poles and supply with working power by two terminal boxes (2,7), two in the same way rotor (4,9) be installed in the rotating shaft 5, stator winding (3,8) is used step 12 location of rotating shaft 5 with step 11 location of support 6, rotor (4,9).

2, energy-saving multi-power asynchronous motor according to claim 1 is characterized in that: rotor (4,9) is a cage rotor.

Images