CN201717841U - Novel electronic power switch of automobile starter - Google Patents
Novel electronic power switch of automobile starter Download PDFInfo
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- CN201717841U CN201717841U CN2010201614949U CN201020161494U CN201717841U CN 201717841 U CN201717841 U CN 201717841U CN 2010201614949 U CN2010201614949 U CN 2010201614949U CN 201020161494 U CN201020161494 U CN 201020161494U CN 201717841 U CN201717841 U CN 201717841U
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Abstract
The utility model relates to the technical field of a low-voltage and high-current switch, and particularly discloses a novel electronic power switch of an automobile starter, which comprises a switch control signal input unit, a microprocessor unit, a drive gate unit, a switching unit and the like. The microprocessor controls the drive gate unit to control the switching-on/off of power switching components of the switching unit, thereby changing the traditional mechanical elastic contact structure, prolonging the service life of the electronic power switch and making the control more intelligent and convenient. Therefore, the utility model can be well applied in automobile starters, onboard lifts, onboard hydraulic devices, high-power motors, low-pressure explosion-proof systems and other situations needing the low-voltage and high-current switch.
Description
Technical field
The utility model relates to low-voltage, high-current switching technique field, is specifically related to a kind of new automobile starter power electronic switching.
Background technology
For a long time, the low-voltage, high-current switch is occupied by the mechanical type electromagnetic switch always, and this type of electromagnetic switch adopts the mechanical elastic contact structure.
At present, traditional automobile starter is made up of DC motor, electromagnetic switch, one-way clutch three parts, and electromagnetic switch wherein is the critical component in the starter.Employed electromagnetic switch under traditional mode makes that easily generation switch contact arcing ablation, adhesion are not cut off the power supply under big current work situation owing to adopt the mechanical elastic contact structure, causes starter to damage, even the catastrophe failure phenomenon of battery damage.In addition, the lifetime limitation of electromagnetic switch itself is shorter, national standard: gasoline engine 35000 times, diesel engine 20000 times.
The utility model content
In order to address the above problem, the purpose of this utility model is to provide a kind of new automobile starter power electronic switching of longer service life.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of new automobile starter power electronic switching, comprise a switch element, described switch element comprises a control end and two make and break contacts, two make and break contacts of described switch element are connected on the load power source main line, this electronic switch also comprises a microprocessor unit, the power end of described microprocessor unit is connected with a power supply unit of voltage regulation, and described power supply unit of voltage regulation is used to provide the microprocessor normal working voltage; Input at described microprocessor unit is connected with a switch controlling signal input unit, and described switch controlling signal input unit is used to check and transmit the switching signal of this electronic switch; Output at described microprocessor unit is connected with a driving gate unit, and the power end of described driving gate unit is connected with a driving power unit, and described driving power unit is used to provide the controlling and driving voltage that drives the gate unit; The output control terminal of described driving gate unit is connected on the control end of described switch element.
As further improvement of the utility model, on described microprocessor unit, also be connected with an operating state indicating member, described operating state indicating member is used to indicate the operating state of this power electronic switching.
As further improvement of the utility model, on described microprocessor unit, also be connected with a timing control unit, described timing control unit is used to control the operating time of this power electronic switching.
As further improvement of the utility model, on described microprocessor unit, also be connected with a temperature detecting unit, described temperature detecting unit is used to check that the working temperature of this power electronic switching is to realize overheat protector.
As further improvement of the utility model, on described microprocessor unit, also be connected with a under-voltage protection unit, institute under-voltage protection unit is used to check that driving voltage that the driving power unit provides is to realize under-voltage protection.
As further improvement of the utility model, on described switch element, also be connected with the switching device protected location.
As further improvement of the utility model, described switch element is made of four high-power FETs of parallel connection, the source electrode of described four high-power FETs all is electrically connected, the drain electrode of described high-power FET all is electrically connected, and the grid of described high-power FET all is electrically connected.
As further improvement of the utility model, described switch controlling signal input unit is made of the optocoupler of two parallel connections.
The utility model comes the closure of electronic switching device in the control switch unit by microprocessor, thereby has changed traditional mechanical elastic force contact structure, therefore, longer service life of the present utility model, control intelligence more is convenient.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute to improper qualification of the present utility model, in the accompanying drawings:
Fig. 1 is a preferred structure block diagram of the present utility model;
Fig. 2 is a kind of concrete preferred structure circuit diagram of the present utility model.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to qualification of the present utility model.
As shown in Figure 1, the utility model discloses a kind of new automobile starter power electronic switching, comprise switch element 1, microprocessor unit 2, switch controlling signal input unit 3, operating state indicating member 4, timing control unit 5, drive gate unit 6, working power unit 7, protected location 8, detecting unit 9; Switch element 1 is made of the device for power switching 11,12,13,14 of four parallel connections; Microprocessor unit 2 comprises microprocessor and conventional peripheral circuit, as the oscillating circuit of 12M hertz etc.; Switch controlling signal input unit 3 comprises switch control unit 32 and switch detecting unit 31; Working power unit 7 comprises power supply unit of voltage regulation 71 and driving power unit 72; Protected location 8 comprises over-temperature protection unit 83, under-voltage protection unit 82, drives locking unit 81, switching device protected location 85, gate pole protected location 84; Detecting unit 9 comprises temperature detecting unit 91 and voltage detection unit 92.
As shown in Figure 1, the switch element 1 in the utility model comprises a control end and two make and break contacts, and two make and break contacts of described switch element are connected on the load power source main line; The power end of microprocessor unit 2 is connected with power supply unit of voltage regulation 71, and power supply unit of voltage regulation 71 is used to provide the microprocessor normal working voltage; Input at microprocessor unit 2 is connected with switch controlling signal input unit 3, and switch controlling signal input unit 3 is used to check and transmit the switching signal of this electronic switch; The output of microprocessor unit 2 is connected with driving gate unit 6, and the power end that drives gate unit 6 is connected with driving power unit 72, and driving power unit 72 is used to provide the controlling and driving voltage that drives gate unit 6; The output control terminal that drives gate unit 6 is connected on the control end of switch element 1; Operating state indicating member 4 is connected on the microprocessor unit 2, and this operating state indicating member 4 is used to indicate the operating state of this power electronic switching; Timing control unit 5 is connected on the microprocessor unit 2, and timing control unit 5 is used to control the operating time of this power electronic switching; Temperature detecting unit 91 and voltage detection unit 92 are connected on the microprocessor unit 2, and described temperature detecting unit 91 is used to check that the working temperature of this power electronic switching is to realize overheat protector; Under-voltage protection unit 82 1 ends are connected on the microprocessor, and the other end is connected on the switch element 1, and institute under-voltage protection unit 82 is used to check that driving voltage that driving power unit 72 provides is to realize under-voltage protection; Drive locking unit 81 and overtemperature prote unit 83 and be connected in parallel on 82 two ends, under-voltage protection unit; Switching device protected location 85 is connected on the switch element 1, is used to protect this unit; This switch element 1 is made of four device for power switching 11,12,13,14 of parallel connection, described device for power switching is a high-power FET, the source electrode of four high-power FETs all is electrically connected, the drain electrode of four high-power FETs all is electrically connected, and the grid of four high-power FETs all is electrically connected; Switch controlling signal input unit 3 is made of the optocoupler of two parallel connections.
Fig. 2 is a kind of concrete preferred structure circuit diagram of the present utility model, and as shown in Figure 2, the utility model four high-power FET M1, M2, M3, M4 form parallel connection type high-power electronic switch unit, and it is serially connected between main power source and the load (direct current machine).Main power source is exported two groups of voltage vccs, Vp+ respectively through 2 road integrated regulator U1, U2; Wherein Vcc provides stable operating voltage for singlechip microprocessor IC1, and Vp+ provides stable constant current charge voltage for the gate-grid control loop of power electronic switching device, and the charge and discharge of capacitor C 6 are as power electronic switching device grids driving power.
As shown in Figure 2, when control terminal S, I do not have the input switch signal: when voltage or electric current, 4 foot switch signals that input to chip microprocessor IC1 through light-coupled isolation device PC1/PC2 are high level, then the 5 pin output low levels of chip microprocessor IC1 are turn-offed transistor Q1, M5, the high level of 3 pin of chip microprocessor IC1 output simultaneously makes transistor Q2 conducting, the grid of locking power electronic switching device M1, M2, M3, M4, the gate driving power supply of power electronic switching device is not provided, disconnects switch loop between main power source and the load.
As shown in Figure 2, as control terminal S, I has the input switch signal: when voltage or electric current, 4 foot switch signals that input to chip microprocessor IC1 are low level, then the 3 pin output low levels of chip microprocessor IC1 are turn-offed transistor Q2, preparation starting power electronic switching device M1, M2, M3, the gate driving power supply of M4, and when the gate driving supply voltage Vp+ of the power electronic switching device of the 6 pin input that detects chip microprocessor IC1 satisfies drive condition, then 5 pin of chip microprocessor IC1 output high level makes transistor Q1, the M5 conducting, the gate driving power supply of power electronic switching device is provided, connects switch loop between main power source and the load.
As shown in Figure 2, when the temperature sampling value T that does not satisfy the 7 pin input of drive condition-under-voltage or chip microprocessor IC1 as the gate driving supply voltage Vp+ of the power electronic switching device of the 6 pin input that detects chip microprocessor IC1 after powering on does not satisfy drive condition-excess temperature, at once the gate driving power supply of switch-off power electronic switching device disconnects switch loop between main power source and the load; Between picking up counting after the each connection in switch loop between main power source and the load, regularly disconnect switch loop between main power source and the load after 150 seconds, need restart timing once more;
As shown in Figure 2,2 pin of chip microprocessor IC1 are red light emitting diodes LED output indication, and when light-emitting diode did not work, power electronic switching disconnected, and promptly this switch is in off position; Normal when bright when light-emitting diode, power electronic switching is connected, and promptly this switch is in running order; Normal when bright when light-emitting diode, power electronic switching is connected, and promptly this switch is in running order; When LED flash, the power electronic switching fault, promptly this switch is in off position.
Below be the correlation technique parameter of Fig. 2 structure:
Operating voltage range: 9～36V (DC)
Rated operational current: continuous (12VDC) 480A peak value (12VDC) 2880A
Maximum operating currenbt :≤720A (12VDC)
Switch dissipation power:＜60W (12VDC/400A)
Stream time: 150S/ each (looking heat dissipating state, customizable work duration)
Control end input voltage, electric current: 4～20VDC, 4～20mA (directionless)
Under-voltage protection: 7V (DC) OFF
Overtemperature prote: 105 ℃ ± 5%OFF
Operating temperature :-40 ℃～+ 85 ℃
Storing temperature :-40 ℃～+ 105 ℃
Circuit board size: 52 (W) * 76 (D) * 30 (H) mm
The circuit design of the utility model power electronic switching and simple and reliable for structure, cost performance high it can be under vehicle-mounted DC power supply or the dynamic DC power supply of wide region operate as normal; Perfect Intelligent Measurement and protective device (overtemperature shutoff, undervoltage lockout); Its sufficient amount of redundancy makes it have very high reliability.Novel power electronic switching device loss is low, compare electromagnetic switch has the longer operating time and the limit in useful life (greater than 1,000,000 times) under equal loaded work piece state.Novel power electronic switching volume is little, temperature rise is low, need not to add radiator, easy for installation, and the mode of connection is equal to the mechanical type electromagnetic switch.In view of the various advantages of novel power electronic switching, the occasion that is applied in needs use low-voltage, high-current switches such as automobile starter, vehicle-mounted lifting machine, vehicle-mounted hydraulic device, heavy-duty motor, low-voltage explosion-proof system that it can be outstanding.
More than technical scheme that the utility model embodiment is provided be described in detail, used specific case herein principle and the execution mode of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as restriction of the present utility model.
Claims (8)
1. a new automobile starter power electronic switching comprises a switch element, and described switch element comprises a control end and two make and break contacts, and two make and break contacts of described switch element are connected on the load power source main line, it is characterized in that:
This electronic switch also comprises a microprocessor unit, and the power end of described microprocessor unit is connected with a power supply unit of voltage regulation, and described power supply unit of voltage regulation is used to provide the microprocessor normal working voltage;
Input at described microprocessor unit is connected with a switch controlling signal input unit, and described switch controlling signal input unit is used to check and transmit the switching signal of this electronic switch;
Output at described microprocessor unit is connected with a driving gate unit, and the power end of described driving gate unit is connected with a driving power unit, and described driving power unit is used to provide the controlling and driving voltage that drives the gate unit;
The output control terminal of described driving gate unit is connected on the control end of described switch element.
2. new automobile starter power electronic switching according to claim 1 is characterized in that:
Also be connected with an operating state indicating member on described microprocessor unit, described operating state indicating member is used to indicate the operating state of this power electronic switching.
3. new automobile starter power electronic switching according to claim 1 is characterized in that:
Also be connected with a timing control unit on described microprocessor unit, described timing control unit is used to control the operating time of this power electronic switching.
4. new automobile starter power electronic switching according to claim 1 is characterized in that:
Also be connected with a temperature detecting unit on described microprocessor unit, described temperature detecting unit is used to check that the working temperature of this power electronic switching is to realize overheat protector.
5. new automobile starter power electronic switching according to claim 1 is characterized in that:
Also be connected with a under-voltage protection unit on described microprocessor unit, institute under-voltage protection unit is used to check that driving voltage that the driving power unit provides is to realize under-voltage protection.
6. new automobile starter power electronic switching according to claim 1 is characterized in that:
On described switch element, also be connected with the switching device protected location.
7. new automobile starter power electronic switching according to claim 1 is characterized in that:
Described switch element is made of four high-power FETs of parallel connection, the source electrode of described four high-power FETs all is electrically connected, the drain electrode of described high-power FET all is electrically connected, and the grid of described high-power FET all is electrically connected.
8. new automobile starter power electronic switching according to claim 1 is characterized in that:
Described switch controlling signal input unit is made of the optocoupler of two parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201614949U CN201717841U (en) | 2010-04-16 | 2010-04-16 | Novel electronic power switch of automobile starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201614949U CN201717841U (en) | 2010-04-16 | 2010-04-16 | Novel electronic power switch of automobile starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717841U true CN201717841U (en) | 2011-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201614949U Expired - Fee Related CN201717841U (en) | 2010-04-16 | 2010-04-16 | Novel electronic power switch of automobile starter |
Country Status (1)
| Country | Link |
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| CN (1) | CN201717841U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745149A (en) * | 2011-04-22 | 2012-10-24 | 厦门金龙联合汽车工业有限公司 | Method for controlling starting and power system of passenger car by utilizing passenger car switching device box |
| CN105915050A (en) * | 2016-04-28 | 2016-08-31 | 西安航天民芯科技有限公司 | I2C controlled four-channel outputting adjustable power supply managing system |
-
2010
- 2010-04-16 CN CN2010201614949U patent/CN201717841U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745149A (en) * | 2011-04-22 | 2012-10-24 | 厦门金龙联合汽车工业有限公司 | Method for controlling starting and power system of passenger car by utilizing passenger car switching device box |
| CN105915050A (en) * | 2016-04-28 | 2016-08-31 | 西安航天民芯科技有限公司 | I2C controlled four-channel outputting adjustable power supply managing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20130416 |