CN110021993A - A kind of anti-down fill system of the power supply of electric machine controller - Google Patents
A kind of anti-down fill system of the power supply of electric machine controller Download PDFInfo
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- CN110021993A CN110021993A CN201910359881.9A CN201910359881A CN110021993A CN 110021993 A CN110021993 A CN 110021993A CN 201910359881 A CN201910359881 A CN 201910359881A CN 110021993 A CN110021993 A CN 110021993A
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- 238000004891 communication Methods 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 7
- 230000037007 arousal Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 3
- 238000005314 correlation function Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 4
- 238000003973 irrigation Methods 0.000 description 4
- 230000002262 irrigation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a kind of anti-down fill systems of the power supply of electric machine controller, including sequentially connected battery, main power source, anti-back flow circuit, rear level power supply and from power supply, the battery positive voltage is also connected with low voltage failure decision circuitry, low voltage failure decision circuitry output end is separately connected anti-back flow circuit and high pressure turns low-voltage circuit, high pressure turns low-voltage circuit input terminal connection power battery, level power supply after output end is connected by redundant power.CAN transceiver chip power supply circuit is separately connected power supply by main power source and from power supply respectively, level power supply and connects from power supply chip is passed through between power supply after described, and power supply chip is also connected with backup battery, and backup battery is to the connection power supply of CAN transceiver chip power supply circuit.The present invention is based on the angle of components controller system, the safety of entire anti-down fill system can be monitored, it is ensured that vehicle correlation function safety；When KL15 rigid line breaks in overall wire sheaves, it is ensured that controller CAN communication is normal, can be with the demand of real-time response vehicle.
Description
Technical field
The present invention relates to electric machine controller power supply, in particular to a kind of anti-down fill system of the power supply of electric machine controller.
Background technique
The technical solution of the power supply reverse-filling of existing electric machine controller is when KL30(battery positive voltage) signal disconnect or
It is under-voltage to secure threshold 9V or less when, low-voltage testing circuit reports low voltage failure, while low voltage failure logical signal triggers high pressure
Turn low-voltage circuit starting work, redundant power, that is, 12V is generated to power to rear class power-supply system.
According to relevant item, high pressure turns low-voltage circuit and hardware damage occurs at the scene, causes redundancy feature to fail, especially
Work as discharged or defective battery, it is under-voltage to below secure threshold when, triggering high pressure turns low-voltage circuit and carries out power supply redundancy, but high pressure turns low
The 12V that volt circuit generates can flow backward onto KL30 signal, to the 12V system power supply of vehicle, occur overburden operating condition rapidly.So
From safety considerations, it is quite necessary to design that a kind of redundant power function is normal, and the peace of power supply reverse irrigation can be effectively prevented
Total system.
What it is closest to this patent is a kind of patent document " redundancy confession that electric machine controller for motor vehicle reverse connection preventing flows backward
Circuit " (application number 201410723856.1), following functions may be implemented: (1) can prevent power supply from falling when low-voltage power-off
It is poured into battery；(2) the reversed damage for leading to electric machine controller of 12V positive and negative anodes can be prevented.
The shortcomings that prior art:
It (1) is only to prevent power supply from flowing backward onto KL30 under KL30 power-down conditions；
(2) mainly from the angle analysis reverse-filling problem of single circuit, not from the angle analysis of system；
(3) whole reverse-filling system principle is not perfect, can not solve the problems, such as the reverse irrigation in the case of discharged or defective battery.
A kind of patent document " redundant power supply circuit that electric machine controller for motor vehicle reverse connection preventing flows backward " reverse-filling electricity
The shortcomings that road: it does not solve in voltage threshold of the battery lower than setting, high pressure turns the redundant power of low-voltage circuit generation
Flow backward the 12V system to vehicle, to damage the risk of controller, while lacking the angle for turning low-pressure system from entire high pressure,
The elaboration of carry out system reverse-filling.
Based on hybrid power redundant power in vehicle strategy, vehicle and components require to consider KL30 voltage lower than setting
The solution of the power supply reverse irrigation problem in the case of threshold value or broken string is set, to improve the security performance of product.
The advantages of this programme:
(1) it can solve KL30 signal broken string or lower than under setting threshold condition, the redundant power inside controller start work
The problem of Shi Yinqi power supply flows backward, reaches more safe and reliable Redundancy Design.
(2) it (is generally wanted the case where electric machine controller has redundant power function, while needing to meet CAN arousal function
The Vbat pin of CAN transceiver chip is asked to connect normal electric signal, and voltage is not less than certain threshold value, otherwise chip can not work normally),
It is normal that this programme may insure that electric machine controller communicates holding with the CAN network of vehicle.
(3) design of anti-down fill system is illustrated from system perspective, while improving vehicle security energy.
Summary of the invention
Object of the present invention is to: a kind of anti-down fill system of power supply of electric machine controller is provided, KL30 signal broken string or low is solved
In being arranged under threshold condition, the problem of redundant power inside controller causes power supply to flow backward when starting work, reaches and more pacify
Complete reliable Redundancy Design；When electric machine controller has redundant power function, while needing to meet CAN arousal function the case where,
It is normal that this programme may insure that electric machine controller communicates holding with the CAN network of vehicle.
The technical scheme is that
A kind of anti-down fill system of the power supply of electric machine controller, including sequentially connected battery, main power source, anti-back flow circuit, after
Level power supply and from power supply, the battery positive voltage is also connected with low voltage failure decision circuitry, low voltage failure decision circuitry output end
It is separately connected anti-back flow circuit and high pressure turns low-voltage circuit, high pressure turns low-voltage circuit input terminal connection power battery, and output end is logical
Cross level power supply after redundant power connects.
It preferably, further include CAN transceiver chip power supply circuit, the CAN transceiver chip power supply circuit is respectively by leading
Power supply and be separately connected power supply from power supply, it is described from power supply include first from power supply and second from power supply.
Preferably, level power supply and from power supply chip connection is passed through between power supply after described, power supply chip is also connected with backup
Power supply, backup battery are connected to CAN transceiver chip power supply circuit and are powered.
Preferably, the low voltage failure decision circuitry detects battery voltage lower than given threshold, control reverse-filling electricity
Road shutdown, prevents from flowing backward；Another circuit triggering high pressure turns low-voltage circuit work, and the redundant power generated gives rear class power-supply system
Power supply.
Preferably, the power supply chip rear class power conversion be from power supply and backup battery, wherein main power source, from power supply
It powers in the normal mode of operation for CAN chip；Occur when the signal between battery positive voltage signal and electric machine controller connects
When abnormal, low-tension supply fault judging circuit detects low-tension supply failure, and anti-back flow circuit starts work, redundant power load
Level power supply afterwards, then the Vbat pin of CAN transceiver chip is down to the threshold value for the work that can keep in communication hereinafter, causing electric machine controller
Fail with the CAN communication of vehicle；Backup battery is that the Vbat pin of CAN transceiver chip is powered at this time, protects CAN network communication
It holds normal.
Preferably, the low voltage failure decision circuitry, including resistance R1~R8, comparator U1A, U1B；Battery voltage is
KL30 signal is divided by resistance R4 and resistance R7, is input to the inverting input terminal of comparator U1A and the normal phase input end of U1B；
Power supply VCC divides to obtain high threshold voltage by resistance R2 and resistance R3, and the positive input of U1A is input to as benchmark Uth_H
End, while power supply VCC divides to obtain low threshold voltage by resistance R6 and resistance R8, is input to the anti-of U1B as benchmark Uth_L
Phase input terminal；The output end of described comparator U1A, U1B are tied altogether exports LV_FAULT, resistance R5 as low voltage failure decision circuitry
Both ends are separately connected the normal phase input end of the inverting input terminal of LV_FAULT and comparator U1A, U1B；The both ends resistance R1 connect respectively
Meet power supply VCC and LV_FAULT.
Preferably, under normal work, the low voltage failure decision circuitry LV_FAULT signal is drawn high by power supply VCC, works as storage
When cell voltage is less than the corresponding voltage of low threshold voltage Uth_L or the disconnection of KL30 harness, the efferent duct of comparator U1A and U1B
Foot will export low level, to trigger the work that high pressure turns low-voltage circuit, triggering high pressure turns the redundant electric of low-voltage circuit generation
Source is loaded into the rear class power-supply system of script.
Preferably, the anti-back flow circuit includes p-type metal-oxide-semiconductor Q1, voltage-stabiliser tube D1, resistance R9~R13, diode D2, three
Pole pipe Q2；Main power source connects the pole D of p-type metal-oxide-semiconductor Q1, and redundant power and rear level power supply connect the pole S of Q1, and the cathode of voltage-stabiliser tube D1 meets Q1
The pole S, anode connects the pole G of Q1, and resistance R9 is in parallel with voltage-stabiliser tube D1, the pole G of a termination Q1 of resistance R10, two poles of another termination
The anode of pipe D2, the cathode of diode D2 connect the pole C of NPN type triode, and low voltage failure judges output logic signal LV_FAULT
It is followed by by the partial pressure of resistance R11 and resistance R12 to the pole B of triode Q2, resistance R13 is the successive load resistance of simulation.
Preferably, when not having low-tension supply failure, LV_FAULT signal is pulled up by VCC, sets H, and driving triode Q2 is led
It is logical, rear class power-supply system is loaded by main power source；When battery voltage is disconnected lower than setting threshold value or KL30 harness, low voltage failure
Judging signal LV_FAULT becomes low level, and LV_FAULT sets L, branch pressure voltage can not turn-on transistor Q2, i.e. triode is in
Off state.
Preferably, the CAN transceiver chip power supply circuit includes CAN transceiver chip U2, and first from power supply and second
It is separately connected pin Vcc, Vio from power supply, KL30 passes through diode D3, D4 with backup battery respectively and connects pin Vbat；?
The Vbat supply voltage of the case where KL30 harness disconnects, CAN transceiver chip is provided by battery originally, is disconnected KL30 and is led later
Cause the failure of CAN arousal function；Level power supply after redundant power load converts generation backup battery by power supply chip and is supplied to CAN
The Vbat pin of transponder chip.
The invention has the advantages that
1, the present invention is based on the angle of components controller system, the safety of entire anti-down fill system can be monitored, it is ensured that vehicle
Correlation function safety；
2, the present invention increases the backup power supply of the CAN transceiver with CAN arousal function, and KL15 rigid line breaks in overall wire sheaves
When, it is ensured that controller CAN communication is normal, can be with the demand of real-time response vehicle；
3, the present invention increases hysteresis circuit in low pressure decision circuitry, prevents controller from toggling when high pressure turns operating on low voltage
The working condition of transformer, to damage the controller function；
4, controller of the present invention judges signal by increasing low pressure, makes controller in vehicle battery voltage lower than given threshold
When, it solves redundant power and flows backward to the safety problem on battery feed.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and embodiments:
Fig. 1 is the power supply reverse-filling overall system architecture of electric machine controller of the present invention；
Fig. 2 is that low pressure of the present invention detects fault judging circuit schematic diagram；
Fig. 3 is anti-back flow circuit schematic diagram of the present invention；
Fig. 4 is CAN transceiver chip power supply circuit schematic diagram of the present invention.
Specific embodiment
As shown in Figure 1, the anti-down fill system of the power supply of electric machine controller of the invention, including sequentially connected battery, master
Power supply, anti-back flow circuit, rear level power supply and from power supply, the battery positive voltage is also connected with low voltage failure decision circuitry, low pressure
Fault judging circuit output end is separately connected anti-back flow circuit and high pressure turns low-voltage circuit, and high pressure turns the connection of low-voltage circuit input terminal
Power battery, level power supply after output end is connected by redundant power.
Further include CAN transceiver chip power supply circuit, the CAN transceiver chip power supply circuit respectively by main power source and from
Power supply is separately connected power supply, it is described from power supply include first from power supply and second from power supply.It is described after level power supply with from power supply it
Between connected by power supply chip, power supply chip is also connected with backup battery, and backup battery connects to CAN transceiver chip power supply circuit
Connect power supply.
Electric machine controller is internal to be provided with low voltage failure decision circuitry by vehicle storage battery power supply.The low voltage failure
Decision circuitry detects battery voltage lower than given threshold, then low voltage failure signal LV_FAULT logic level transition is L, control
Anti-back flow circuit shutdown processed, prevents from flowing backward；Another circuit triggering high pressure turns low-voltage circuit work, after the redundant power generated is given
Level power supply system power supply.
The power supply chip rear class power conversion be from power supply and backup battery, wherein main power source, from power supply normal
It powers under operating mode for CAN chip；When the signal connection between battery positive voltage signal and electric machine controller occurs abnormal,
If harness disconnects, low-tension supply fault judging circuit detects low-tension supply failure, and anti-back flow circuit starts work, redundant power
Level power supply after load, then the Vbat pin of CAN transceiver chip is down to the threshold value for the work that can keep in communication hereinafter, causing motor control
The CAN communication of device and vehicle processed fails；Backup battery is that the Vbat pin of CAN transceiver chip is powered at this time, keeps CAN network logical
News keep normal.
As shown in Fig. 2, the low voltage failure decision circuitry, including resistance R1~R8, comparator U1A, U1B；Battery electricity
Pressure is that KL30 signal is divided by resistance R4 and resistance R7, is input to the inverting input terminal of comparator U1A and the positive input of U1B
End；Power supply VCC divides to obtain high threshold voltage by resistance R2 and resistance R3, and the positive for being input to U1A as benchmark Uth_H is defeated
Enter end, while power supply VCC divides to obtain low threshold voltage by resistance R6 and resistance R8, is input to U1B's as benchmark Uth_L
Inverting input terminal；The output end of described comparator U1A, U1B are tied altogether exports LV_FAULT, resistance as low voltage failure decision circuitry
The both ends R5 are separately connected the normal phase input end of the inverting input terminal of LV_FAULT and comparator U1A, U1B；The both ends resistance R1 difference
Connect power supply VCC and LV_FAULT.
Under normal work, the low voltage failure decision circuitry LV_FAULT signal is drawn high by power supply VCC, works as battery voltage
When voltage corresponding less than low threshold voltage Uth_L or KL30 harness disconnect, the output pin of comparator U1A and U1B will be defeated
Low level out, to trigger the work that high pressure turns low-voltage circuit, the redundant power that high pressure turns low-voltage circuit generation is loaded into originally
Rear class power-supply system.Resistance R5 uses high resistance measurement, constitutes hysteresis comparison circuit with comparator U1A, U1B, can subtract significantly
Few input voltage exceeds comparator output level conversion time when respective threshold, and the decision logic signal moment for solving output comes
Jitter problem is returned, response time when starting high pressure turns in low-voltage circuit is reduced, so that it is guaranteed that the stability of the circuit.
As shown in figure 3, the anti-back flow circuit include p-type metal-oxide-semiconductor Q1, voltage-stabiliser tube D1, resistance R9~R13, diode D2,
Triode Q2；Main power source connects the pole D of p-type metal-oxide-semiconductor Q1, and redundant power and rear level power supply connect the pole S of Q1, and the cathode of voltage-stabiliser tube D1 connects
The pole S of Q1, anode connect the pole G of Q1, and resistance R9 is in parallel with voltage-stabiliser tube D1, the pole G of a termination Q1 of resistance R10, another termination two
The anode of pole pipe D2, the cathode of diode D2 connect the pole C of NPN type triode, and low voltage failure judges output logic signal LV_
FAULT is followed by by the partial pressure of resistance R11 and resistance R12 to the pole B of triode Q2, and resistance R13 is the successive load electricity of simulation
Resistance.
When not having low-tension supply failure, LV_FAULT signal is pulled up by VCC, sets H, driving triode Q2 conducting, by leading
Power supply loads rear class power-supply system；When battery voltage is disconnected lower than setting threshold value or KL30 harness, low voltage failure judgement letter
Number LV_FAULT becomes low level, and LV_FAULT sets L, branch pressure voltage can not turn-on transistor Q2, i.e. triode is in cut-off shape
State.
If not will lead to p-type metal-oxide-semiconductor Q1 by judging that signal turns off triode Q2 in circuit and be unanimously on shape
State, redundant power is flowed backward by Q1 to battery voltage, and battery voltage is directly connected to the 12V system of vehicle, will lead to
High pressure turns the hardware damage of low-voltage circuit.And this patent can solve the problems, such as reverse irrigation of the redundant power to battery very well.
As shown in figure 4, the CAN transceiver chip power supply circuit includes CAN transceiver chip U2, first from power supply and
Two are separately connected pin Vcc, Vio from power supply, and KL30 passes through diode D3, D4 with backup battery respectively and connects pin Vbat；?
The Vbat supply voltage of the case where KL30 harness disconnects, CAN transceiver chip is provided by battery originally, is disconnected KL30 and is led later
Cause the failure of CAN arousal function.Level power supply after redundant power load converts generation backup battery by power supply chip and is supplied to CAN
The Vbat pin of transponder chip.As the Vbat pin of Fig. 4, CAN transceiver chip are supplied by KL30 or backup battery " selectivity "
Electricity, the setting of diode D3 and D4 effectively prevent the influence of the interaction between KL30 signal and backup battery, thus storing
When the KL30 broken string of battery, it still can ensure that electric machine controller and vehicle CAN communication are normal.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
It cans understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all to lead according to the present invention
The modification for wanting the Spirit Essence of technical solution to be done, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of anti-down fill system of the power supply of electric machine controller, which is characterized in that including sequentially connected battery, main power source,
Anti-back flow circuit, rear level power supply and from power supply, the battery positive voltage is also connected with low voltage failure decision circuitry, and low voltage failure is sentenced
Deenergizing output end is separately connected anti-back flow circuit and high pressure turns low-voltage circuit, and high pressure turns low-voltage circuit input terminal connection power electric
Pond, level power supply after output end is connected by redundant power.
2. the anti-down fill system of the power supply of electric machine controller according to claim 1, which is characterized in that further include CAN transmitting-receiving
Device chip power supply circuit, the CAN transceiver chip power supply circuit is separately connected power supply by main power source and from power supply respectively, described
It include first from power supply and second from power supply from power supply.
3. the anti-down fill system of the power supply of electric machine controller according to claim 2, which is characterized in that it is described after level power supply with
It is connected between power supply by power supply chip, power supply chip is also connected with backup battery, and backup battery is supplied to CAN transceiver chip
Electric circuit connection power supply.
4. the anti-down fill system of the power supply of electric machine controller according to claim 3, which is characterized in that the low voltage failure is sentenced
Deenergizing detects battery voltage lower than given threshold, and control anti-back flow circuit shutdown prevents from flowing backward；Another circuit triggering is high
Pressure turns low-voltage circuit work, and the redundant power generated is powered to rear class power-supply system.
5. the anti-down fill system of the power supply of electric machine controller according to claim 4, which is characterized in that the power supply chip handle
Rear class power conversion be from power supply and backup battery, wherein main power source, from power supply be in the normal mode of operation that CAN chip supplies
Electricity；When the signal connection between battery positive voltage signal and electric machine controller occurs abnormal, low-tension supply fault judging circuit
Detect low-tension supply failure, anti-back flow circuit starts work, level power supply after redundant power load, then CAN transceiver chip
Vbat pin is down to the threshold value for the work that can keep in communication hereinafter, the CAN communication of electric machine controller and vehicle is caused to fail；It is standby at this time
Part power supply is that the Vbat pin of CAN transceiver chip is powered, and keeps CAN network communication normally.
6. the anti-down fill system of the power supply of electric machine controller according to claim 4, which is characterized in that the low voltage failure is sentenced
Deenergizing, including resistance R1~R8, comparator U1A, U1B；Battery voltage, that is, KL30 signal is by resistance R4 and resistance R7 points
Pressure, is input to the inverting input terminal of comparator U1A and the normal phase input end of U1B；Power supply VCC is divided by resistance R2 and resistance R3
High threshold voltage is obtained, the normal phase input end of U1A is input to as benchmark Uth_H, while power supply VCC passes through resistance R6 and resistance
R8 divides to obtain low threshold voltage, and the inverting input terminal of U1B is input to as benchmark Uth_L；Described comparator U1A, U1B's is defeated
Outlet is tied altogether exports LV_FAULT as low voltage failure decision circuitry, and the both ends resistance R5 are separately connected LV_FAULT and comparator
The normal phase input end of the inverting input terminal of U1A, U1B；The both ends resistance R1 are separately connected power supply VCC and LV_FAULT.
7. the anti-down fill system of the power supply of electric machine controller according to claim 6, which is characterized in that under normal work, institute
It states low voltage failure decision circuitry LV_FAULT signal to be drawn high by power supply VCC, when battery voltage is less than Uth_L pairs of low threshold voltage
When the voltage or KL30 harness answered disconnect, the output pin of comparator U1A and U1B will export low level, to trigger high pressure
Turn the work of low-voltage circuit, the redundant power that triggering high pressure turns low-voltage circuit generation is loaded into the rear class power-supply system of script.
8. the anti-down fill system of the power supply of electric machine controller according to claim 6, which is characterized in that the anti-back flow circuit
Including p-type metal-oxide-semiconductor Q1, voltage-stabiliser tube D1, resistance R9~R13, diode D2, triode Q2；Main power source meets the D of p-type metal-oxide-semiconductor Q1
Pole, redundant power and rear level power supply connect the pole S of Q1, and the cathode of voltage-stabiliser tube D1 connects the pole S of Q1, and anode connects the pole G of Q1, resistance R9 with
Voltage-stabiliser tube D1 is in parallel, the pole G of a termination Q1 of resistance R10, the anode of another terminating diode D2, and the cathode of diode D2 connects
The pole C of NPN type triode, low voltage failure judge output logic signal LV_FAULT after the partial pressure of resistance R11 and resistance R12
It is connected to the pole B of triode Q2, resistance R13 is the successive load resistance of simulation.
9. the anti-down fill system of the power supply of electric machine controller according to claim 8, which is characterized in that when there is no low-tension supply
When failure, LV_FAULT signal is pulled up by VCC, sets H, and driving triode Q2 conducting loads rear class power-supply system by main power source；When
When battery voltage is disconnected lower than setting threshold value or KL30 harness, low voltage failure judges that signal LV_FAULT becomes low level, LV_
FAULT sets L, branch pressure voltage can not turn-on transistor Q2, i.e. triode is in off state.
10. the anti-down fill system of the power supply of electric machine controller according to claim 9, which is characterized in that CAN transceiver chip
Power supply circuit includes CAN transceiver chip U2, and first is separately connected pin Vcc, Vio from power supply from power supply and second, KL30 and
Backup battery passes through diode D3, D4 connection pin Vbat respectively；The case where KL30 harness disconnects, CAN transceiver chip
Vbat supply voltage is provided by battery originally, and disconnect KL30 causes CAN arousal function to fail later；Redundant power loads rear class
Power supply converts the Vbat pin for generating backup battery and being supplied to CAN transceiver chip by power supply chip.
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| CN201910359881.9A CN110021993A (en) | 2019-04-30 | 2019-04-30 | A kind of anti-down fill system of the power supply of electric machine controller |
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| CN201910359881.9A CN110021993A (en) | 2019-04-30 | 2019-04-30 | A kind of anti-down fill system of the power supply of electric machine controller |
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| CN112564260A (en) * | 2020-11-09 | 2021-03-26 | 奇瑞新能源汽车股份有限公司 | Switch control protection circuit and protection method of automobile controller system |
| CN113511074A (en) * | 2021-04-26 | 2021-10-19 | 安徽江淮汽车集团股份有限公司 | Backup power supply circuit, device and equipment of motor controller |
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Application publication date: 20190716 |