CN201893710U - Automatic control circuit for current of drive motor of electric automobile - Google Patents
Automatic control circuit for current of drive motor of electric automobile Download PDFInfo
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- CN201893710U CN201893710U CN2010206553570U CN201020655357U CN201893710U CN 201893710 U CN201893710 U CN 201893710U CN 2010206553570 U CN2010206553570 U CN 2010206553570U CN 201020655357 U CN201020655357 U CN 201020655357U CN 201893710 U CN201893710 U CN 201893710U
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Abstract
The utility model discloses an automatic control circuit for current of a drive motor of an electric automobile. Each phase current switch circuit forms a current input switch and a current output switch by two sets of anti-parallel metal oxide semiconductor (MOS) tubes and a driving circuit for the two sets of anti-parallel MOS tubes; the current input switch and the current output switch are respectively used for conducting positive semiperiod current and negative semiperiod current; the current input switch and the current output switch are respectively provided with a plurality of MOS tubes which are connected in parallel and are the same in number; a driving signal is provided for each MOS tube by the driving circuit; the MOS tubes of the current input switch and the current output switch are evenly arranged on two semi-circumferences with the same radius; grid electrodes of the MOS tubes respectively face to the respective centre of a circle and are connected in parallel through leads of the grid electrodes; parallel nodes are the centre of a circle respectively; the leads are straight lines and are radial; and all the leads are on the radii and are equal in length. The automatic control circuit has the advantages that the lengths of the leads and the distances among the leads of each MOS tube are consistent; the impedance between MOS tubes is balanced so that the MOS tubes are not easy to burn; the breakover or the cutoff of all the MOS tubes is completely synchronous and cannot be disordered; the reliability of the switches is high, and the safety of driven electric equipment like the electric automobile is ensured.
Description
Technical field:
The utility model relates to electric automobile, is specifically related to the current switching circuit of electric automobile motor.
Background technology:
Adopt electrical equipments such as dc powered electric automobile, its complex structure, the cost height, maintenance is also inconvenient.And the alternating current machine cost is low, and is simple in structure, and maintenance is also convenient.For this reason, the utility model becomes three-phase alternating current with dc inverter, drives electrical equipments such as electric automobile with three phase alternating current motor.Between inverter and motor, be provided with the high speed electronic switch circuit, this switching circuit is formed with metal-oxide-semiconductor and drive circuit thereof, and is limited because of the rated current-carrying capacity of single metal-oxide-semiconductor, uses many parallel connections usually.
At present, metal-oxide-semiconductor all is to adopt the array formula to arrange, each metal-oxide-semiconductor grid to the distance of sys node does not wait, be the length difference of grid lead, cause the drive signal of each metal-oxide-semiconductor asynchronous, at first the metal-oxide-semiconductor of conducting always is in overload, very easily burn, chain reaction like this, remaining metal-oxide-semiconductor also will burn in succession, cause current switch to lose efficacy.
In addition, each metal-oxide-semiconductor and lead-in wire distance each other thereof are also different, cause impedance between each metal-oxide-semiconductor (mainly being reactance) imbalance, because electronic switch is to work under the strong alternating electric field operating mode of high voltage, big electric current, will produce stronger induced potential between each metal-oxide-semiconductor, and the drive signal of metal-oxide-semiconductor is a weak electric signal, induced potential is enough to disturb drive signal, it is disorderly plain that this can make that conducting, the shutoff of metal-oxide-semiconductor take place, and switching function lost efficacy.
Above-mentioned security of operation that either way can the serious threat electrical equipment.
The utility model content:
The utility model is at above-mentioned the deficiencies in the prior art, and the synchronous electrical equipment of impedance balance between a kind of pipe of each metal-oxide-semiconductor, drive signal such as the drive motors electric current automatic control circuit of electric automobile are provided.
The utility model is to realize its purpose by the following technical solutions:
A kind of driving motor for electric automobile electric current automatic control circuit, each phase current switching circuit constitutes electric current input and output switch by the metal-oxide-semiconductor and the drive circuit thereof of two groups of reverse parallel connections, be respectively applied for conducting positive half cycle current and negative half-cycle current, described electric current inputs or outputs switch and has many identical metal-oxide-semiconductors that are connected in parallel of quantity respectively, and described drive circuit provides drive signal to the grid of each metal-oxide-semiconductor; The metal-oxide-semiconductor of described electric current input and output switch is evenly arranged in respectively on the identical semi-circumference of two radiuses, and its grid is connected in parallel by its lead-in wire respectively towards the center of circle separately, sys node is the center of circle, and lead-in wire is a straight line, radially, institute is leaded all on radius, and length is identical.
Described electric current input and output switch is the equally distributed two groups of metal-oxide-semiconductors of semi-circumference and arranges that in opposite directions sys node is adjacent.
The rated current-carrying capacity of all metal-oxide-semiconductors in the described electric current input and output switch is identical.
The beneficial effects of the utility model are: adopt said structure to make the lead-in wire length of each metal-oxide-semiconductor in the electronic switch and tube pitch from unanimity, impedance balance between the pipe of each metal-oxide-semiconductor, can not produce induced potential and disturb drive signal, the conducting of metal-oxide-semiconductor or shutoff can be disorderly; Drive signal arrives each metal-oxide-semiconductor synchronously, and the conducting of each metal-oxide-semiconductor or shutoff are synchronous fully, and the load of each metal-oxide-semiconductor is even, is difficult for burning; The reliability height of switch, the fail safe of electrical equipment such as electric automobile is secure.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of this driving motor for electric automobile electric current automatic control circuit.
Fig. 2 is the spatial placement schematic diagram of metal-oxide-semiconductor among Fig. 1.
Embodiment:
Referring to Fig. 1: drive electric automobile with three phase alternating current motor, the direct current of storage battery 1 converts three-phase alternating current to through three-phase inverter 2, power to three-phase alternating-current motor 5 through the electric current automatic control circuit again, the utility model i.e. the current switch 3 of each phase wherein, this current switch 3 is electronic switches, constitute the electric current input switch and the husband is opened in electric current output by the metal-oxide-semiconductor of two groups of reverse parallel connections and drive circuit 4 thereof, provide drive voltage signal by drive circuit 4 to the grid of each metal-oxide-semiconductor, the conducting of driven MOS pipe, one group of metal-oxide-semiconductor (being the electric current input switch) conducting positive half cycle current wherein, another group metal-oxide-semiconductor (being electric current output switch) conducting negative half-cycle current.
Referring to Fig. 2: electric current input switch of the present utility model and output switch, compose in parallel by five metal-oxide-semiconductors respectively, each metal-oxide-semiconductor has the electric current input utmost point, output stage and the grid that is used to be connected drive signal.The metal-oxide-semiconductor of electric current input switch is evenly distributed on the semi-circumference (180 degree), and its grid is towards the center of circle, and the grid of each metal-oxide-semiconductor is connected in parallel by its lead-in wire, and sys node A is the center of circle, and lead-in wire is a straight line, and all on radius, radially, its length all equates.The arrangement of the metal-oxide-semiconductor of electric current output switch and the metal-oxide-semiconductor of electric current input switch is identical, and sys node B is the center of circle.And, two semicircles in opposite directions, center of circle A, B are adjacent, radius is identical.
The specification of all metal-oxide-semiconductors should be consistent, and promptly rated current-carrying capacity is identical.Can select the specification and the quantity of metal-oxide-semiconductor according to contact capacity (electric current) flexibly, for example, contact capacity is 35A, selects the metal-oxide-semiconductor of 7 5A for use, input switch or the output switch that constitutes 35A in parallel, the metal-oxide-semiconductor parallel connection that also can select 5 7A for use.
This current switch adopts above-mentioned spatial placement structure, and the lead-in wire length of each metal-oxide-semiconductor and tube pitch are from unanimity, and impedance balance between the pipe of each metal-oxide-semiconductor can not produce induced potential and disturb drive signal, and the conducting of metal-oxide-semiconductor or shutoff can be disorderly; Drive signal arrives each metal-oxide-semiconductor synchronously, and the conducting of each metal-oxide-semiconductor or shutoff are synchronous fully, and the load of each metal-oxide-semiconductor is even, is difficult for burning; The reliability height of switch, the fail safe of electrical equipment such as electric automobile is secure.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.
Claims (3)
1. driving motor for electric automobile electric current automatic control circuit, each phase current switching circuit constitutes electric current input and output switch by the metal-oxide-semiconductor and the drive circuit thereof of two groups of reverse parallel connections, be respectively applied for conducting positive half cycle current and negative half-cycle current, described electric current inputs or outputs switch and has many identical metal-oxide-semiconductors that are connected in parallel of quantity respectively, and described drive circuit provides drive signal to the grid of each metal-oxide-semiconductor; It is characterized in that: the metal-oxide-semiconductor of described electric current input and output switch is evenly arranged in respectively on the identical semi-circumference of two radiuses, its grid is respectively towards separately the center of circle, be connected in parallel by its lead-in wire, sys node is the center of circle, lead-in wire is a straight line, radially, institute is leaded all on radius, and length is identical.
2. electric current automatic control circuit according to claim 1 is characterized in that: described electric current input and output switch is the equally distributed two groups of metal-oxide-semiconductors of semi-circumference and arranges that in opposite directions sys node is adjacent.
3. three-phase alternating-current motor current switch according to claim 2 is characterized in that: the rated current-carrying capacity of all metal-oxide-semiconductors in the described electric current input and output switch is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206553570U CN201893710U (en) | 2010-12-13 | 2010-12-13 | Automatic control circuit for current of drive motor of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206553570U CN201893710U (en) | 2010-12-13 | 2010-12-13 | Automatic control circuit for current of drive motor of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893710U true CN201893710U (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206553570U Expired - Fee Related CN201893710U (en) | 2010-12-13 | 2010-12-13 | Automatic control circuit for current of drive motor of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201893710U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580528A (en) * | 2012-07-30 | 2014-02-12 | 发那科株式会社 | Power converter in which switching elements are driven in parallel |
| CN110932619A (en) * | 2018-09-18 | 2020-03-27 | 株式会社东芝 | Control device, control system, and control method |
-
2010
- 2010-12-13 CN CN2010206553570U patent/CN201893710U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580528A (en) * | 2012-07-30 | 2014-02-12 | 发那科株式会社 | Power converter in which switching elements are driven in parallel |
| CN110932619A (en) * | 2018-09-18 | 2020-03-27 | 株式会社东芝 | Control device, control system, and control method |
| CN110932619B (en) * | 2018-09-18 | 2024-04-16 | 株式会社东芝 | Control device, control system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Leshan Mutian Electric Appliance Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20171213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |