CN2279740Y

CN2279740Y - Three-phase asynchronous compound motor

Info

Publication number: CN2279740Y
Application number: CN 96245105
Authority: CN
Inventors: 滕国兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-25
Filing date: 1996-10-25
Publication date: 1998-04-22
Anticipated expiration: 2006-10-25

Abstract

The utility model discloses a three-phase asynchronous compound motor. The utility model comprises a shaft, stators, rotors, a base, a fan and an end cover, a housing is integral, the inner of the housing is provided with independent double stators which are coaxially arranged, and the working procedures of the utility model are controlled by an external circuit. The main motor of the utility model can start loads by two motors, the utility model can work independently or two motors of the utility model work simultaneously. The utility model is suitable for driving beam oil pumping machines used in oil fields, and the utility model can is also suitable for occasions which the starting load is large and the negative frequency after starting is low, such as a conveyer belt, etc.

Description

Phase asynchronous compound motor

The utility model relates to a kind of threephase asynchronous, particularly relates to a kind of energy-efficient phase asynchronous compound motor.

The beam type pump drive motor that uses in the oil field all is to start under heavy duty at present, and during operate as normal, the load factor of motor is only about 30～35%, power factor also has only below 0.5, reactive power is big, line loss is serious, for addressing this problem, people have done many effort, such as, with electric capacity compensation power factor, improve the starting torque of motor, and the revolutional slip of raising motor etc., but produce little effect, people had realized again that the motor power (output) that adopts two power and former oil pumper to be complementary equated or approximately equalised motor afterwards, starting in parallel, be 92243212.0 by the patent No. again after the starting, name is called " the parallel-connected induction motors group drives the oil pumper electric control gear " control stops a motor automatically, by a motor driven oil pumper job, improved the load factor of motor, but when this working method was used at the scene, belt and the belt pulley that change wearing and tearing were extremely inconvenient.

The purpose of this utility model is, overcomes the deficiency of prior art, two-shipper work when a kind of starting is provided, but both unit work during operate as normal, but the phase asynchronous compound motor of the efficient power-saving of two-shipper work again.

Following mode can realize the utility model:

Phase asynchronous compound motor comprises axle, stator, rotor, support, fan and end cap, and its shell is an integral type, inner is two stators independently, and two rotor coaxials are installed, and near fan end main motor are installed, away from fan end installation assisted electric machine; Its terminal box connects outer control circuit.

Motor stator subshell two parts are fastening by screw with the seam location by convex tendon.

The utility model shell is an integral body, easy for installation, stator casing two parts are by the fastening structure convenient for maintaining of screw, it is convenient to change belt and belt pulley, the power-assisted machine both can participate in load starting, can stop automatically or start according to load variations under external circuit control again, improved power factor and load factor, the integrated power-saving rate is about 30%.

Fig. 1 is the utility model overall structure schematic diagram;

Fig. 2 is a M enlarged drawing among Fig. 1;

Fig. 3 is the electrical principle schematic diagram.

Embodiment is described in detail in detail in conjunction with the accompanying drawings:

Two rotors 5 are loaded on the same axle 1, two independent stators 4 are loaded in two stator casings, stator casing two parts by convex tendon 9 with seam 1 by the screw 11 fastening integral body that become, end cap 2 is loaded on axle 1 two ends, fan 6 is loaded on the main motor side, the outer fan housings 7 that are equipped with of fan 6, away from fan 6 be the assisted electric machine, fin 8 is housed outside stator case.

The course of work summary of the utility model under external circuit control:

In conjunction with Fig. 3, press start button HAZ, the 1C coil electricity, 1C normally opened contact closure, 1C is a self-locking structure, this moment, the main motor energising started, the 1ZJ action is for the 2C actuating of relay is prepared, because starting current surpasses the main motor rated current, make the LJ actuating of relay, LJ normally opened contact closure, the action of the 1SJ time relay, the 2C coil electricity, 2C normal opened contact closure, the assisted electric machine starts, this main motor and assisted electric machine are worked simultaneously, reach rated revolution after, starting current reduces rapidly, in the times of be reduced to less than the main motor rated current 1.1 times, LJ resets, the 1SJ outage, and the time-delay of 1SJ normally opened contact disconnects, the 2C coil blackout, the assisted electric tester in power-down state quits work, and continues to drag loaded work piece by main motor, if load changes, and the main motor rated current is increased, when increasing to the main motor rated current more than 1.1 times the time, LJ action, 1SJ energising, promptly repeat above-mentioned again, the start-up course of power-assisted machine, main motor and assisted electric machine are worked simultaneously, drive load.Main motor and assisted electric machine are done open phase protection by thermal relay, press stop button TAZ, and complete machine promptly quits work.

The compound power of electric motor of the utility model is distributed and can be made the power of main motor account for 50%, 60%, 70% of total capacity according to customer requirements; The power of assist motor accounts for 50%, 40%, 30% of total capacity, to adapt to the occasion of different loads rate.

Claims

1, a kind of phase asynchronous compound motor, comprise axle, stator, rotor, support, fan and end cap, it is characterized in that: shell is an integral type, inner be pair stators independently, two rotor coaxials are installed, near fan end main motor is installed, away from fan end the assisted electric machine is installed, its terminal box connects outer control circuit.

2, motor according to claim 1 is characterized in that: stator casing two parts are located with seam by convex tendon, and are fastening by screw.