CN207450014U - A kind of EPS controller secures on-off circuit - Google Patents
A kind of EPS controller secures on-off circuit Download PDFInfo
- Publication number
- CN207450014U CN207450014U CN201721543081.5U CN201721543081U CN207450014U CN 207450014 U CN207450014 U CN 207450014U CN 201721543081 U CN201721543081 U CN 201721543081U CN 207450014 U CN207450014 U CN 207450014U
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- circuit
- resistance
- transistor
- eps
- pmos tube
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Abstract
The utility model is related to vehicle steering electric boosting steering system technical field, a kind of particularly EPS controller secures on-off circuit.The utility model discloses a kind of EPS controller secures on-off circuits, including the first transistor on-off circuit and second transistor on-off circuit, positive pole is sequentially connected the first transistor on-off circuit, motor circuit, second transistor on-off circuit and power cathode and forms circuit, the control output end of the control termination EPS controllers of the first transistor on-off circuit, the ignition signal that the control terminal of the second transistor on-off circuit picks up.The utility model forms electronic switch using transistor switch and substitutes relay, solves the problems, such as mechanical switch, and service life is long, and reliability is high, and volume only has the 1/10 of relay, price saves half, and circuit structure is simple, it is easily fabricated, controller is allow to accomplish smallerization, cost is lower.
Description
Technical field
The utility model belongs to vehicle steering electric boosting steering system technical field, is controlled more particularly to a kind of EPS
Device safety switch circuit processed.
Background technology
Electric boosting steering system (abbreviation EPS) is the developing direction of automobile steering system, due to it is energy saving, space is small, easy
The advantages such as repair are instead of traditional hydraulic steering system.EPS controllers are by series of algorithms and judge that final output is suitable
Electric current to motor, allow motor that steering wheel is driven to rotate.EPS controllers need a safety switch, when controller fails, energy
In time by the failure of current of motor, ensure that motor will not malfunction.Traditional way be by the use of a relay as safety switch,
But since relay volume is big, the area of circuit board can be increased in board design, cause circuit board that can not minimize, and electricity
The area increase of road plate also results in cost increase.The cost of relay in itself is also high, the cost of increased EPS.
In addition, relay is mechanical switch, surge current can be generated when cut-offfing influences the service life of relay.Vehicle shakes for a long time
When dynamic, come off there are relay vibrations process internal mechanical part and cause relay failure.
The content of the invention
The purpose of this utility model is to provide a kind of EPS controller secures on-off circuits to solve the above problems.
To achieve the above object, the technical solution adopted in the utility model is：A kind of EPS controller secures on-off circuit,
Including the first transistor on-off circuit and second transistor on-off circuit, positive pole is sequentially connected the first transistor switch electricity
Road, motor circuit, second transistor on-off circuit and power cathode form circuit, the control of the first transistor on-off circuit
Terminate the control output end of EPS controllers, the ignition signal that the control terminal of the second transistor on-off circuit picks up.
Further, the first transistor on-off circuit includes NPN triode Q3, PMOS tube Q2, resistance R3, resistance R4
With resistance R5, the source electrode of the PMOS tube Q2 connects positive pole, and the drain electrode of the PMOS tube Q2 connects motor circuit, the PMOS tube
The gate series resistance R4 of Q2 meets the collector of NPN triode Q3, the emitter ground connection of the NPN triode Q3, the NPN tri-
The base series resistor R3 of pole pipe Q3 connects the control output end of EPS controllers, and the resistance R5 is connected on PMOS tube Q2 source electrodes and grid
Between pole.
Further, the second transistor on-off circuit includes NMOS tube Q1, resistance R1 and resistance R2, the NMOS tube
The source electrode ground connection of Q1, the drain electrode of the NMOS tube Q1 connect power cathode, and the resistance R1 and resistance R2 series connection are followed by believing in igniting
Number between ground, the grid of the NMOS tube Q1 is connected on the node between resistance R1 and resistance R2.
Further, zener diode D1, the negative terminal connecting resistance R1 of the zener diode D1 and resistance R2 are further included
Between node, the positive ending grounding of the zener diode D1.
Further, the voltage stabilizing value of the zener diode D1 is 13V.
The advantageous effects of the utility model：
The utility model forms electronic switch using transistor switch and substitutes relay, solves the problems, such as mechanical switch, makes
With long lifespan, reliability is high, and volume only has the 1/10 of relay, and price saves half, and circuit structure is simple, easily fabricated,
Controller is allow to accomplish smallerization, cost is lower.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model specific embodiment.
Specific embodiment
The utility model is further illustrated in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of EPS controller secures on-off circuit, including the first transistor on-off circuit and the second crystal
Pipe on-off circuit, positive pole are sequentially connected the first transistor on-off circuit, motor circuit, second transistor on-off circuit and electricity
Source cathode composition circuit, the control output end of the control termination EPS controllers of the first transistor on-off circuit, described second
The ignition signal that the control terminal of transistor switching circuit picks up.
In this specific embodiment, the first transistor on-off circuit include NPN triode Q3, PMOS tube Q2, resistance R3,
Resistance R4 and resistance R5, the second transistor on-off circuit include NMOS tube Q1, resistance R1 and resistance R2.
The source electrode of the PMOS tube Q2 connects positive pole, the drain electrode of the PMOS tube Q2 connect motor circuit (to show in figure,
Voltage VBB is provided to motor circuit), the gate series resistance R4 of the PMOS tube Q2 meets the collector of NPN triode Q3, institute
The emitter ground connection of NPN triode Q3 is stated, the control that the base series resistor R3 of the NPN triode Q3 connects EPS controllers is defeated
Outlet, the resistance R5 are connected between PMOS tube Q2 source electrodes and grid.
The source electrode ground connection of the NMOS tube Q1, the drain electrode of the NMOS tube Q1 connect power cathode, the resistance R1 and resistance
R2 series connection is followed by between ignition signal and ground, and the grid of the NMOS tube Q1 is connected on the node between resistance R1 and resistance R2
On.
Further, further include zener diode D1, the zener diode D1 negative terminal connecting resistance R1 and resistance R2 it
Between node, the positive ending grounding of the zener diode D1.In this specific embodiment, the preferably voltage stabilizing value of zener diode D1 is
13V avoids vehicle IG signals (ignition signal) overtension.Certainly, in other embodiments, the voltage stabilizing value of zener diode D1
It can make choice according to actual needs, this is that those skilled in the art can realize easily, is no longer described in detail.
Certainly, in other embodiments, it may be employed in the first transistor on-off circuit and second transistor on-off circuit
Its circuit structure can mainly realize switching function, this is that those skilled in the art can realize easily, is no longer described in detail.
Existing relay K1 is substituted using NMOS tube Q1, and NMOS tube Q1 is placed on power cathode end, can be avoided
The impacting with high pressure of positive pole, and power cathode is substantially not present pressure difference.
After vehicle ignition starts, IG signals (ignition signal) are provided to controller, it, will after being divided by resistance R1 and R2
NMOS tube Q1 is turned on, and EPS controllers export control signal to control the conducting of NPN triode Q3, so as to control PMOS tube Q2's
Conducting, after PMOS tube Q2 is turned on, entire circuit conducting, power supply is powered to motor circuit, and realization, which helps, to be turned.
After vehicle stall, IG signal-off, NMOS tube Q1 is closed, and EPS controllers export control signal to control NPN tri-
The closing of pole pipe Q3 so as to control the closing of PMOS tube Q2, cuts off the power and powers to motor circuit.
When EPS controllers occur abnormal, EPS controllers export control signal to control the closing of NPN triode Q3, from
And the closing of PMOS tube Q2 is controlled, continue to power to motor circuit so as to cut off power supply.
The utility model forms electronic switch using transistor switch and substitutes relay, solves the problems, such as mechanical switch, makes
With long lifespan, reliability is high, and volume only has the 1/10 of relay, and price saves half, and circuit structure is simple, easily fabricated,
Controller is allow to accomplish smallerization, cost is lower.
Although specifically showing and describing the utility model with reference to preferred embodiment, those skilled in the art should
This is understood, in the spirit and scope for not departing from the utility model that the appended claims are limited, in form and details
On the utility model can be made a variety of changes, be the scope of protection of the utility model.
Claims (5)
1. a kind of EPS controller secures on-off circuit, it is characterised in that：Including the first transistor on-off circuit and second transistor
On-off circuit, positive pole are sequentially connected the first transistor on-off circuit, motor circuit, second transistor on-off circuit and power supply
Cathode forms circuit, and the control output end of the control termination EPS controllers of the first transistor on-off circuit, described second is brilliant
The ignition signal that the control terminal of body pipe on-off circuit picks up.
2. EPS controller secures on-off circuit according to claim 1, it is characterised in that：The first transistor switch
Circuit includes NPN triode Q3, PMOS tube Q2, resistance R3, resistance R4 and resistance R5, the source electrode of the PMOS tube Q2 and is connecing power supply just
Pole, the drain electrode of the PMOS tube Q2 connect motor circuit, and the gate series resistance R4 of the PMOS tube Q2 connects the collection of NPN triode Q3
Electrode, the emitter ground connection of the NPN triode Q3, the base series resistor R3 of the NPN triode Q3 connect EPS controllers
Control output end, the resistance R5 are connected between PMOS tube Q2 source electrodes and grid.
3. EPS controller secures on-off circuit according to claim 1 or 2, it is characterised in that：The second transistor is opened
Powered-down road includes the source electrode ground connection of NMOS tube Q1, resistance R1 and resistance R2, the NMOS tube Q1, and the drain electrode of the NMOS tube Q1 connects
Power cathode, the resistance R1 and resistance R2 series connection are followed by between ignition signal and ground, and the grid of the NMOS tube Q1 is connected on
On node between resistance R1 and resistance R2.
4. EPS controller secures on-off circuit according to claim 3, it is characterised in that：Zener diode D1 is further included,
Node between the negative terminal connecting resistance R1 of the zener diode D1 and resistance R2, the positive ending grounding of the zener diode D1.
5. EPS controller secures on-off circuit according to claim 4, it is characterised in that：The zener diode D1's
Voltage stabilizing value is 13V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721543081.5U CN207450014U (en) | 2017-11-17 | 2017-11-17 | A kind of EPS controller secures on-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721543081.5U CN207450014U (en) | 2017-11-17 | 2017-11-17 | A kind of EPS controller secures on-off circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207450014U true CN207450014U (en) | 2018-06-05 |
Family
ID=62280552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721543081.5U Expired - Fee Related CN207450014U (en) | 2017-11-17 | 2017-11-17 | A kind of EPS controller secures on-off circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207450014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768648A (en) * | 2018-07-26 | 2020-02-07 | 苏州能讯微波集成电路有限公司 | TDD (time division Duplex) switching circuit and depletion type semiconductor amplifying circuit |
-
2017
- 2017-11-17 CN CN201721543081.5U patent/CN207450014U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768648A (en) * | 2018-07-26 | 2020-02-07 | 苏州能讯微波集成电路有限公司 | TDD (time division Duplex) switching circuit and depletion type semiconductor amplifying circuit |
| CN110768648B (en) * | 2018-07-26 | 2024-05-14 | 苏州能讯微波集成电路有限公司 | TDD switching circuit and depletion type semiconductor amplifying circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20201117 |