CN2666726Y

CN2666726Y - Series excitation regulating speed device for electric vehicle

Info

Publication number: CN2666726Y
Application number: CNU2003201233580U
Authority: CN
Inventors: 向可为
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-19
Filing date: 2003-12-19
Publication date: 2004-12-29
Anticipated expiration: 2013-12-19

Abstract

The utility model provides a series speed regulating device for electric vehicles, which is mainly used on the electric vehicles and increases the torque of electric vehicles greatly without a gearbox. The utility model is characterized in that each series winding comprises a plurality of loops that are connected in series according to group and then are connected in series as a whole; part of the loop groups can be short-circuited by a conversion-switch, thereby reducing the intensity of magnetic field, reaching the purpose of changing the rotating speed and the torque, realizing convenient adjustment of the torque of electric vehicles without the gear-box, reducing the manufacturing cost of the whole vehicle, improving the transferring efficiency, and providing convenience for the operators.

Description

Electric vehicle series excitation speed regulation device

The utility model proposes a kind of electric vehicle series excitation speed regulation device, be mainly used on the battery-driven car, solve the technology of the driving torque variation of battery-driven car.

We know that vehicle is very big in the variation of its resisting moment of travels down, when starting, acceleration, climbing, heavy duty, require to have bigger moment, and when level road, underloading, require moment less, diesel locomotive adopts the change speed gear box speed change to solve contradiction usually, but adopting change speed gear box one on small-sized electric car is to have improved the car load manufacturing cost, the 2nd, reduced transmission efficiency, the 3rd, increased operation easier.The drive motor of existing various small-sized electric cars adopts permanent magnet motor as driving power mostly, the advantage of permanent magnet motor be simple in structure, efficient is higher, its shortcoming is that excitatory magneto motive force is constant, can not adapt to the requirement of battery-driven car to torque.Therefore the battery-driven car that has adopts series-wound electric motor, the excitatory magnetic field of series-wound electric motor can suitably increase along with the increase of load moment, the scope of its output torque is confidential bigger than permanent-magnet electric, but still can not satisfy the requirement of travelling of battery-driven car fully, when heavy duty and climbing, often cause motor overheating, even burn out electrical motor.

The purpose of this utility model provides a kind of electric vehicle series excitation speed regulation device, can not need change speed gear box and the torque that improves battery-driven car significantly.

The purpose of this utility model is to realize like this, the series excitation winding is made up of loop A (5) and (6) two coils of coil B, each loop A is connected mutually, each coil B connects mutually, two groups of coils are connected again then, other end power connection after the loop A series connection, another termination armature after the coil B series connection, the two ends after the coil B series connection are connected to change-over swith 1 (8); The series excitation winding can be two pairs, three pairs or four pairs; The series excitation winding also can be made up of loop A (5), (7) three coils of line chart B (6), line chart C, and the two ends after the coil B series connection are connected to change-over swith 1 (8), and the two ends after the coil C series connection are connected to change-over swith 2 (9).One group of contact (11) of available relay is connected on former switch positions, relay coil (10) be connected between power supply and the source switch after change-over swith is connected.

Owing to adopted such scheme, following characteristics compared with prior art arranged: do not need change speed gear box just can adjust the torque of electrical motor easily, reduced the car load manufacturing cost, improved transmission efficiency, made things convenient for the operator.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of a pair of series excitation winding two coil;

Fig. 2 is the circuit interconnect pattern of a pair of series excitation winding two coil;

Fig. 3 is the structural representation of two pairs of series excitation winding two coils;

Fig. 4 is the circuit interconnect pattern of two pairs of series excitation winding two coils;

Fig. 5 is the circuit interconnect pattern of a pair of series excitation winding triple coil;

Fig. 6 is the circuit interconnect pattern that replaces change-over swith with relay contact;

(1) is armature in the drawings, and (2) are the series excitation windings, and (3) are source switchs, and (4) are power supplys, (5) be loop A, (6) are coil B, and (7) are coil C, and (8) are change-overs swith 1, (9) be change-over swith 2, (10) are relay coils, and (11) are relay contacts.

In Fig. 1, electrical motor has a pair of series excitation winding, and polarity is respectively N and S, and each series excitation winding is made up of loop A and coil B, two loop A series connection, two coil B series connection, two groups of coils are connected again then, will note the on line direction during series connection, guarantee that back two the series excitation windings of energising produce N and S polarity respectively, other end power connection after the loop A series connection, another termination armature after the coil B series connection, the two ends after coil B series connection are connected to change-over swith 1.Fig. 2 is the circuit interconnect pattern of Fig. 1 structure, can be well understood to principle of work in the drawings, when power turn-on switch (3), electric current flows back to the power-level by flow through two coil B (6), two loop A (5), armature (1), source switch (3) of power supply (4) positive pole, under this operating mode, all there is electric current to flow through among loop A and the coil B, can produce higher magnetic field, the big rotating speed of torque of electrical motor output this moment is lower, meets battery-driven car heavy duty and the requirement of going up a slope.When the change-over swith that closes (8), short circuit coil B, therefore having only has electric current to flow through in the loop A, the magnetic field of generation is lower, the torque of battery-driven car output this moment is less and rotating speed is higher, meets the requirement of battery-driven car underloading, level road.

Electrical motor has two pairs of series excitation windings in Fig. 3 and Fig. 4, its principle of work is with Fig. 1 and Fig. 2, the polarity that just will note the series excitation winding when wiring should be that the N utmost point and the S utmost point are alternately arranged, and requiring the series excitation winding according to motor designs also can be three pairs, four pairs, but its principle of work all is the same.

Each series excitation winding is made up of loop A, coil B, coil C in Fig. 5, each loop A is connected mutually, each coil B connects mutually, each coil C connects mutually, three groups of coil series connection mutually more then, the other end power connection after the loop A series connection, another termination armature after the coil C series connection, two ends after the coil B series connection are connected to change-over swith 1, and the two ends after the coil C series connection are connected to change-over swith 2.All have electric current to flow through among loop A, coil B, the coil C during normal operation, can produce the highest magnetic field, this moment, the torque maximum speed of electrical motor output was minimum; When closing change-over swith 9, short circuit coil C, therefore having only among loop A, the coil B has electric current to flow through, the magnetic field of generation is then lower, the torque of battery-driven car output this moment is less and rotating speed is higher; When closing change-over

swith

8 and 9 simultaneously, short circuit coil B and C, therefore having only has electric current to flow through in the loop A, the magnetic field that produces is minimum, the torque minimum of battery-driven car output this moment and rotating speed is the highest, this scheme can make the torque and the rotation speed change of electrical motor output comparatively level and smooth, and the number of turn that suitably changes coil B, coil C can produce 4 kinds of different torques and rotating speed.

In the scheme of Fig. 6, one group of contact (11) with relay is connected on former switch positions, relay coil (10) be connected between power supply and the source switch after change-over swith (8) is connected, relay can be installed in by the motor like this, receive change-over swith and relay coil by thin wire, be convenient to remote servicing and automatic guidance, structure also can solve with this programme among Fig. 5, just needs two relays.

Claims

1 electric vehicle series excitation speed regulation device, form by armature (1), a pair of series excitation winding (2), source switch (3), power supply (4), change-over swith (8), it is characterized in that: the series excitation winding is made up of loop A (5) and (6) two coils of line chart B, each loop A is connected mutually, each coil B connects mutually, and two groups of coils are connected again then, the other end power connection after the loop A series connection, another termination armature after the coil B series connection, the two ends after the coil B series connection are connected to change-over swith 1 (8).

2 electric vehicle series excitation speed regulation devices according to claim 1 is characterized in that: the series excitation winding can be two pairs, three pairs or four pairs.

3 electric vehicle series excitation speed regulation devices according to claim 1, it is characterized in that: the series excitation winding is made up of loop A (5), (7) three coils of line chart B (6), line chart C, each loop A is connected mutually, each coil B connects mutually, and each coil C connects mutually, then three groups of coil series connection mutually again, other end power connection after the loop A series connection, another termination armature after the coil C series connection, the two ends after the coil B series connection are connected to change-over swith 1 (8), and the two ends after the coil C series connection are connected to change-over swith 2 (9).

4 electric vehicle series excitation speed regulation devices according to claim 1 is characterized in that: be connected on former switch positions with relay contact (11), relay coil (10) be connected between power supply and the source switch after change-over swith is connected.