CN204993006U - Permanent magnetism direct current double power motor - Google Patents

Abstract

The utility model discloses a permanent magnetism direct current double power motor, including motor front end housing, first brush, second brush, commutator contactor, commutator adapter, first brush support body, second brush support body, rotor winding, motor shell, motor spindle and motor rear end cap, the commutator contactor has first commutator segment and second commutator segment, the commutator adapter has first conducting strip and second conducting strip, double power's application has prolonged the life of motor, commutator contactor and brush can be installed at motor shell outsidely, with end cap seal before the motor, need not dismantle motor shell like this when commutator contactor and brush wear and just can change, and the maintenance of motor is more convenient, reduce the cost.

Description

A kind of DC duplex sonography

Technical field

The utility model relates to permanent magnet DC motor field, is specially a kind of DC duplex sonography.

Background technology

Existing motor, be all single power in a rated operation substantially, therefore this motor can only keep a kind of operating state for a long time, such as electric automobile.Motor can steady operation when smooth road traveling for electric automobile.If electric automobile is in climbing state, then motor can be in overload.If the climbing time is shorter, then little on motor impact, if but be in climbing state for a long time, then there is comparatively macrolesion to motor.If but used heavy-duty motor all the time, then automobile motor meeting power surplus when flat road surface travels, also could affect vehicle driving mileage and electrical machinery life.Therefore, the motor of a kind of duplex sonography or even many power is badly in need of.The commutator of existing motor is structurally the round structure surrounded by several commutator segments, and this commutator segment contacts with brush as the sliding contact of brush, and brush only contacts two commutator segments at one time.Meanwhile, commutator accesses whole rotor windings, can only realize the single power of motor like this, cannot realize the conversion of two power or even more power.And the requirement of electric automobile to the space in engine head is higher, therefore, according to the motor that the spatial choice draw ratio in engine head is suitable, tool has very important significance.

Existing direct current machine, its commutator is mounted in motor case inside, and motor is not quick detachable, and therefore, once commutator breaks down, the process of dismounting motor extremely bothers, and not easily changes it.If there have in unloading process to be improper, can motor be damaged, even cause scrapping of whole motor.

Utility model content

For the deficiencies in the prior art, the technical problem that the utility model quasi-solution is determined is, a kind of DC duplex sonography is provided, comprises motor front end cover, the first brush, the second brush, commutator contactor, commutator adapter, the first brush support body, the second brush support body, rotor windings, motor case, electric machine main shaft and back end cover for motor; Described commutator contactor has the first commutator segment and the second commutator segment; Described commutator adapter has the first conducting strip and the second conducting strip; The application of two power extends the useful life of motor; Commutator contactor and brush can be arranged on motor case outside, and with motor front end cover sealing, need not dismantle motor case when commutator contactor and wear of brush like this and just can change, the maintenance of motor is convenient, reduces cost.

The technical scheme that the utility model solve the technical problem is, a kind of DC duplex sonography is provided, it is characterized in that described motor comprises motor front end cover, the first brush, the second brush, commutator contactor, commutator adapter, the first brush support body, the second brush support body, rotor windings, motor case, electric machine main shaft and back end cover for motor; Described commutator contactor has the first commutator segment and the second commutator segment; Described commutator adapter has the first conducting strip and the second conducting strip;

Described motor front end cover and back end cover for motor are connected on motor case; Described commutator contactor and commutator adapter are arranged on electric machine main shaft; Described commutator contactor is connected with rotor windings with cable by commutator adapter; Described commutator adapter is connected with rotor windings by cable; Described rotor windings is arranged on electric machine main shaft; The two ends of described electric machine main shaft are arranged on motor case respectively and motor rear end covers; Described motor front end cover is fixed with the first brush support body and the second brush support body; Described first brush is arranged in the first brush support body in the mode be free to slide along motor axial direction, thus contacts with the second commutator segment or be separated; Described second brush is arranged in the second brush support body in the mode be free to slide along motor radial direction, thus contacts with the first commutator segment or be separated; Insulator is had in the middle of described first commutator segment and the second commutator segment; Insulator is had in the middle of described first conducting strip and the second conducting strip; Conducting between described first commutator segment and the first conducting strip, and insulate between the second conducting strip; Conducting between described second commutator segment and the second conducting strip, and insulate between the first conducting strip.

Compared with prior art, the utility model beneficial effect is: the utility model novel structure, and principle is simple and reliable, practical; Use two groups of different parameters rotor windings with two enter the commutator of function be connected respectively, use two groups of brush structures, realize an electrical motors to two kinds of different power, the application of two power extends the useful life of motor.And, this motor not only can realize two power, owing to employing commutator contactor and commutator adapter, so the conventional components such as commutator adapter are arranged on motor case inside, and commutator contactor and brush can be arranged on motor case outside, with motor front end cover sealing, motor case need not be dismantled when commutator contactor and wear of brush like this and just can change, the maintenance of motor is convenient, reduces cost.

Accompanying drawing explanation

Fig. 1 is the whole interior structural representation of a kind of embodiment of the utility model DC duplex sonography; (in figure: 1, motor front end cover; 2, the first brush; 3, the second brush; 4, commutator contactor; 5, commutator adapter; 6, the first brush support body; 7, the second brush support body; 8, rotor windings; 9, motor case; 10, electric machine main shaft; 11, back end cover for motor)

Fig. 2 is the commutator contactor construction schematic diagram of a kind of embodiment of the utility model DC duplex sonography; (in figure: 41, the first commutator segment; 42, the second commutator segment)

Fig. 3 is the commutator adaptor structure schematic diagram of a kind of embodiment of the utility model DC duplex sonography; (in figure: 51, the first conducting strip; 52, the second conducting strip)

Embodiment

Carry out clear, complete description by the technical scheme in the utility model embodiment below, obviously, described embodiment is a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.

The utility model provides a kind of DC duplex sonography (see Fig. 1-3, be called for short motor), comprise motor front end cover 1, first brush 2, second brush 3, commutator contactor 4, commutator adapter 5, first brush support body 6, second brush support body 7 rotor windings 8, motor case 9, electric machine main shaft 10 and back end cover for motor 11; Described commutator contactor 4 has the first commutator segment 41 and the second commutator segment 42; Described commutator adapter 5 has the first conducting strip 51 and the second conducting strip 52;

Described motor front end cover 1 and back end cover for motor 11 are connected on motor case 9; Described commutator contactor 4 is arranged on electric machine main shaft 10 with commutator adapter 5; Described commutator contactor 4 is connected with rotor windings 8 with cable by commutator adapter 5; Described commutator adapter 5 is connected with rotor windings 8 by cable; Described rotor windings 8 is arranged on electric machine main shaft 10; The two ends of described electric machine main shaft 10 are arranged on motor case 9 and back end cover for motor 11 respectively; Described motor front end cover 1 is fixed with the first brush support body 6 and the second brush support body 7; Described first brush 2 is arranged in the first brush support body 6, can be free to slide along motor axial direction, thus contacts with the second commutator segment 42 or be separated; Described second brush 3 is arranged in the second brush support body 7, can be free to slide along motor radial direction, thus contacts with the first commutator segment 41 or be separated; Insulator is had in the middle of described first commutator segment 41 and the second commutator segment 42; Insulator is had in the middle of described first conducting strip 51 and the second conducting strip 52; Described first conducting strip 51 is whole by cable access rotor windings 8, and described second conducting strip 52 is by the part of cable rotor windings 8; Conducting between described first commutator segment 41 and the first conducting strip 51, and insulate between the second conducting strip 52; Conducting between described second commutator segment 42 and the second conducting strip 52, and insulate between the first conducting strip 51.

When the first brush 2 contacts with the second commutator segment 42, when the second brush 3 and the first commutator segment 41 are separated, now motor is in the first operating state; Electric current arrives rotor windings 8 after flowing through the first brush 2, second commutator segment 42, second conducting strip 52, and rotor windings 8 part access this moment, motor exports the first power.When the second brush 3 contacts with the first commutator segment 41, when the first brush 2 and the second commutator segment 42 are separated, now motor is in the second operating state; Electric current arrives rotor windings 8 after flowing through the second brush 3, first commutator segment 41, first conducting strip 51, and rotor winding 8 all accesses this moment, and motor exports the second power.Motor just can be made mutually to transform between high-output power and low power output by the state of control brush, so just achieve two power of motor.

For brush and commutator contactor 4, due to long-term friction, it easily weares and teares, and needs to change.For existing commercially available motor, need when changing commutator to dismantle motor, but the unloading process of motor is complicated, motor easily damages, and makes motor cannot continue to use.For this motor, only motor front end cover 1 need be taken apart when changing commutator contactor 4, just can when not destroying motor body structure, by commutator contactor 4 is separated with commutator adapter 5, thus the replacing carried out commutator contactor 4, brush is also convenient to change simultaneously.

Operation principle of the present utility model and workflow are: when motor be in need high power work time, if motor application is when automobile is climbed, the first brush 2 and the second commutator segment 42 are separated, and simultaneously the second brush 3 contacts with the first commutator segment 41.Now, be conducting between the second brush 3, first commutator segment 41, first conducting strip 51, after electric current enters motor from outside, after flowing through the second brush 3, first commutator segment 41, first conducting strip 51, arrive rotor windings.Now rotor windings all accesses, there is more winding, therefore under the effect of electromagnetic field, under same voltage, whole rotor windings produces larger electromagnetic torque and larger induced electromotive force, along with motor speed raises, induced electromotive force increases to input voltage rapidly, and now motor has comparatively hard mechanical property and can export comparatively high pulling torque.

When motor be in need smaller power to work time, if motor application is when the automobile normal running, the second brush 3 and the first commutator segment 41 are separated, and the first brush 2 contacts with the second commutator segment 42 simultaneously.Now, be conducting between the first brush 2, second commutator segment 42, second conducting strip 52, after electric current enters motor from outside, flow through the first brush 2, second commutator segment 42, second conducting strip 52 and arrive rotor windings.Now rotor windings part access, has less winding, and therefore under the effect of electromagnetic field, under same voltage, whole rotor windings produces less electromagnetic torque and less induced electromotive force, and now motor exports less moment of torsion.

When the second brush 3 and the first commutator segment 41 are separated by electric machine control system, when first brush 2 contacts with the second commutator segment 42, motor winding is by whole access state entering part access state, and duplex sonography is changed to little torque conditions by large torque conditions, and induced electromotive force reduces thereupon.When motor is in hypervelocity spot speed, induced electromotive force is reduced to lower than input voltage, and motor can continue to raise speed thus complete the above speed governing of hypervelocity point; Induced electromotive force reduces with the speed of rotation speed change, the relative deliquescing of mechanical property, and the rated output power of motor reduces and output torque reduces, and motor speed-raising is convenient in mechanical property deliquescing simultaneously.

When the first brush 2 and the second commutator segment 42 are separated by electric machine control system, when second brush 3 contacts with the first commutator segment 41, motor winding enters whole access state by part access state, and duplex sonography is changed to large torque conditions by little torque conditions, and induced electromotive force increases thereupon.When induced electromotive force increases to higher than input voltage, decelerating through motor, thus produce braking action.

The utility model is not addressed part and is applicable to prior art.

Claims (2)

1. a DC duplex sonography, is characterized in that described motor comprises motor front end cover, the first brush, the second brush, commutator contactor, commutator adapter, the first brush support body, the second brush support body, rotor windings, motor case, electric machine main shaft and back end cover for motor; Described commutator contactor has the first commutator segment and the second commutator segment; Described commutator adapter has the first conducting strip and the second conducting strip;

Described motor front end cover and back end cover for motor are connected on motor case; Described commutator contactor and commutator adapter are arranged on electric machine main shaft; Described commutator contactor is connected with rotor windings with cable by commutator adapter; Described commutator adapter is connected with rotor windings by cable; Described rotor windings is arranged on electric machine main shaft; The two ends of described electric machine main shaft are arranged on motor case respectively and motor rear end covers; Described motor front end cover is fixed with the first brush support body and the second brush support body; Described first brush is arranged in the first brush support body in the mode be free to slide along motor axial direction, thus contacts with the second commutator segment or be separated; Described second brush is arranged in the second brush support body in the mode be free to slide along motor radial direction, thus contacts with the first commutator segment or be separated; Insulator is had in the middle of described first commutator segment and the second commutator segment; Insulator is had in the middle of described first conducting strip and the second conducting strip; Conducting between described first commutator segment and the first conducting strip, and insulate between the second conducting strip; Conducting between described second commutator segment and the second conducting strip, and insulate between the first conducting strip.

2. DC duplex sonography according to claim 1, is characterized in that the draw ratio of described motor is 1.3-1.6:1.