CN109962461A - IGBT excess temperature protection method, the device of hybrid vehicle and electric machine controller - Google Patents
IGBT excess temperature protection method, the device of hybrid vehicle and electric machine controller Download PDFInfo
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- CN109962461A CN109962461A CN201711404057.8A CN201711404057A CN109962461A CN 109962461 A CN109962461 A CN 109962461A CN 201711404057 A CN201711404057 A CN 201711404057A CN 109962461 A CN109962461 A CN 109962461A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of hybrid vehicle and for IGBT excess temperature protection method, the device of electric machine controller in hybrid vehicle; wherein; hybrid vehicle includes engine, power motor, power battery, the auxiliary-motor being connected with engine, auxiliary-motor controller; method is the following steps are included: obtain the revolving speed of auxiliary-motor, and obtain the temperature of IGBT in auxiliary-motor controller；Judge whether the temperature of IGBT in the revolving speed and auxiliary-motor controller of auxiliary-motor meets relay turn-off criterion；If the temperature of IGBT meets relay turn-off criterion in the revolving speed and auxiliary-motor controller of auxiliary-motor; then control relay shutdown; the overheat protector to IGBT in electric machine controller may be implemented in this method; can be avoided electric machine controller under three-phase shortcircuit state high current damage IGBT the occurrence of; reduce hardware damage probability; it helps to ensure that vehicle driving safety, and at low cost, while being convenient for full-vehicle control.
Description
Technical field
The present invention relates to automotive field, in particular to a kind of IGBT for electric machine controller in hybrid vehicle
(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) excess temperature protection method, one kind are for mixing
Close the IGBT over-temperature protection device and a kind of hybrid vehicle of electric machine controller in power vehicle.
Background technique
In the related technology, the Preservation tactics of motor and controller generally use protection limitation function in hybrid vehicle
It closes wave, motor excess temperature limit power, power device excess temperature with protection stopping function, such as overcurrent and closes wave shutdown, three-phase shortcircuit protection
Deng.These Preservation tactics be typically all judge processing to certain signal that hardware system samples and then to motor and its
Controller carries out limitation protection, i.e., will do it corresponding torque and power limit compared with Gao Shicai in electric machine controller temperature.
However, being then possible to if temperature rises comparatively fast when and electric machine controller higher in motor speed leads to high current
The case where temperature continues rapid increase after appearance excess temperature limited torque.If when motor speed is higher than short-circuit protection revolving speed, into
Enter three-phase shortcircuit guard mode, then since the presence of high current, electric machine controller may be rapidly heated, equally there is damage motor
The power device of electric machine controller can not be effectively protected in the risk of controller.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of IGBT excess temperature protection method for electric machine controller in hybrid vehicle, and this method can be with
It realizes the overheat protector to IGBT in electric machine controller, electric machine controller big electricity under three-phase shortcircuit state can be reduced or avoided
The occurrence of stream damage IGBT, hardware damage probability is reduced, helps to ensure that vehicle driving safety, and at low cost, simultaneously
Convenient for full-vehicle control.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
Third object of the present invention is to propose a kind of IGBT excess temperature for electric machine controller in hybrid vehicle
Protective device.
Fourth object of the present invention is to propose a kind of hybrid vehicle.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of for motor control in hybrid vehicle
The IGBT excess temperature protection method of device processed, the hybrid vehicle include engine, power motor, power battery and the hair
The connected auxiliary-motor of motivation, auxiliary-motor controller, the engine output power to the hybrid power vapour by clutch
The wheel of vehicle, the power motor are used to output driving force to the wheel of the hybrid vehicle, and the power battery is used for
It powers to the power motor, the auxiliary-motor is connected with the power battery, drive of the auxiliary-motor in the engine
Under generate electricity, the auxiliary-motor controller is connected by relay with the auxiliary-motor, be the described method comprises the following steps: being obtained
The revolving speed of the auxiliary-motor is taken, and obtains the temperature of IGBT in the auxiliary-motor controller；Judge the auxiliary-motor revolving speed and
Whether the temperature of IGBT meets relay turn-off criterion in the auxiliary-motor controller；If revolving speed and the pair electricity of the auxiliary-motor
The temperature of IGBT meets the relay turn-off criterion in machine controller, then controls the relay shutdown.
IGBT excess temperature protection method according to an embodiment of the present invention for electric machine controller in hybrid vehicle, first
The revolving speed of auxiliary-motor is obtained, and obtains the temperature of IGBT in auxiliary-motor controller, and is controlled in the revolving speed of auxiliary-motor and auxiliary-motor
When the temperature of IGBT meets relay turn-off criterion in device, control relay shutdown.Thus, it is possible to realize in electric machine controller
The overheat protector of IGBT can be avoided electric machine controller under three-phase shortcircuit state the occurrence of high current damage IGBT, drop
Low hardware damage probability, helps to ensure that vehicle driving safety, and at low cost, while being convenient for full-vehicle control.
In order to achieve the above objectives, a kind of computer readable storage medium that second aspect of the present invention embodiment proposes, has
It is stored in instruction therein, when executed, is used for hybrid power vapour described in the hybrid vehicle execution
The IGBT excess temperature protection method of electric machine controller in vehicle.
Computer readable storage medium according to an embodiment of the present invention has and is stored in instruction therein, works as hybrid power
When the processor of automobile executes the instruction, hybrid vehicle executes above-mentioned for electric machine controller in hybrid vehicle
The overheat protector to IGBT in electric machine controller may be implemented in IGBT excess temperature protection method, can be avoided electric machine controller three
High current damages the occurrence of IGBT under phase short-circuit condition, reduces hardware damage probability, helps to ensure that vehicle traveling peace
Entirely, and it is at low cost, while being convenient for full-vehicle control.
In order to achieve the above objectives, one kind that third aspect present invention embodiment proposes is for motor control in hybrid vehicle
The IGBT over-temperature protection device of device processed, the hybrid vehicle include engine, power motor, power battery and the hair
The connected auxiliary-motor of motivation, auxiliary-motor controller, the engine output power to the hybrid power vapour by clutch
The wheel of vehicle, the power motor are used to output driving force to the wheel of the hybrid vehicle, and the power battery is used for
It powers to the power motor, the auxiliary-motor is connected with the power battery, drive of the auxiliary-motor in the engine
Under generate electricity, the auxiliary-motor controller is connected by relay with the auxiliary-motor, and the protective device includes: acquisition mould
Block, for obtaining the revolving speed of the auxiliary-motor；Detection module, for detecting the temperature of IGBT in the auxiliary-motor controller；Sentence
Disconnected module, whether the temperature of IGBT meets relay pass in the revolving speed and the auxiliary-motor controller for judging the auxiliary-motor
Broken strip part；Control module, for controlling institute when the revolving speed is greater than preset threshold and the temperature is greater than preset temperature threshold
State relay shutdown.
IGBT over-temperature protection device according to an embodiment of the present invention for electric machine controller in hybrid vehicle, passes through
The revolving speed that module obtains auxiliary-motor is obtained, and detects the temperature of IGBT in auxiliary-motor controller by detection module, and then pass through
Control module is when revolving speed and temperature meet relay turn-off criterion, control relay shutdown.Thus, it is possible to realize to motor control
The overheat protector of IGBT in device processed can be avoided the hair of electric machine controller high current damage IGBT situation under three-phase shortcircuit state
It is raw, hardware damage probability is reduced, helps to ensure that vehicle driving safety, and at low cost, while being convenient for full-vehicle control.
Further, fourth aspect present invention embodiment proposes a kind of hybrid vehicle, including above-mentioned for mixing
Close the IGBT over-temperature protection device of electric machine controller in power vehicle.
The hybrid vehicle proposed according to embodiments of the present invention, by above-mentioned for motor control in hybrid vehicle
The IGBT over-temperature protection device of device processed, the device may be implemented to can be avoided electricity to the overheat protector of IGBT in electric machine controller
Machine controller the occurrence of high current damage IGBT, reduces hardware damage probability, helps to protect under three-phase shortcircuit state
Vehicle driving safety is demonstrate,proved, and at low cost, while being convenient for full-vehicle control.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the block diagram of hybrid vehicle according to an embodiment of the invention；
Fig. 2 a is the structural schematic diagram of hybrid vehicle according to an embodiment of the invention；
Fig. 2 b is the structural schematic diagram of hybrid vehicle in accordance with another embodiment of the present invention；
Fig. 3 is the block diagram of hybrid vehicle accord to a specific embodiment of that present invention；
Fig. 4 is the structural schematic diagram according to the hybrid vehicle of a specific embodiment of the invention；
Fig. 5 is the IGBT excess temperature protection method according to an embodiment of the present invention for electric machine controller in hybrid vehicle
Flow diagram；
Fig. 6 is the IGBT overheat protector of electric machine controller in hybrid vehicle accord to a specific embodiment of that present invention
The flow chart of method；
Fig. 7 is the IGBT over-temperature protection device according to an embodiment of the present invention for electric machine controller in hybrid vehicle
Block diagram；
Fig. 8 is the block diagram of hybrid vehicle according to an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Fig. 1 is the block diagram of hybrid vehicle according to an embodiment of the present invention.As shown in Figure 1, the hybrid vehicle
100 include: engine 1, power motor 2, power battery 3, auxiliary-motor 4 and auxiliary-motor controller 41.
A specific embodiment according to the present invention, hybrid vehicle can be PHEV (Plug-in Hybrid
Electric Vehicle, plug-in hybrid-power automobile).
Referring to Fig.1, engine 1 outputs power to the wheel 7 of hybrid vehicle by clutch 6；Power motor 2 is used
In the wheel 7 for outputting driving force to hybrid vehicle.That is, any of engine 1 and power motor 2 can be independent
Output power to wheel 7, alternatively, engine 1 and power motor 2 can also simultaneously output power to wheel 7.
Auxiliary-motor 4 is connected with engine 1, and for example, referring to Fig. 2 a, Fig. 2 b, auxiliary-motor 4 can pass through the train end of engine 1
It is connected with engine 1, auxiliary-motor 4 is also connected with power motor 2 and power battery 3 respectively, drive of the auxiliary-motor 4 in engine 1
Under when being generated electricity, realize and charge to power battery 3 and/or power to power motor 2, wherein power battery 3 can be used for dynamic
Force motor 2 is powered.It should be understood that engine 1 can drive auxiliary-motor 4 to generate electricity while output power is to wheel 7, it can also
Individually auxiliary-motor 4 is driven to generate electricity.
Referring to Fig.1, Fig. 4, auxiliary-motor controller 41 are connected by relay 8 with auxiliary-motor 4, as a result, auxiliary-motor controller
41 can realize control to auxiliary-motor 4 by the conducting of relay 8, and can be stopped by the shutdown of relay 8 to auxiliary-motor 4 into
Row control.
Further, referring to Fig. 3, hybrid vehicle 100 can also include DC-DC converter 5, and auxiliary-motor 4 is gone back and DC-
DC converter 5 is connected, and when auxiliary-motor 4 is generated electricity under the drive of engine 1, can also realize and supply to DC-DC converter 5
Electricity.
In some embodiments, auxiliary-motor 4 can be BSG (Belt-driven Starter Generator, belt transmission
Starting/generating integrated motor) motor.It should be noted that auxiliary-motor 4 belongs to high-voltage motor, such as the power generation electricity of auxiliary-motor 4
Pressure is suitable with the voltage of power battery 3, so that the electric energy that auxiliary-motor 4 generates can be without voltage transformation directly to power battery 3
Charging can also power directly to power motor 2 and/or DC-DC converter 5.And auxiliary-motor 4 also belongs to high efficiency generator, example
It drives the power generation of auxiliary-motor 4 that higher generating efficiency can be realized such as under 1 idling speed of engine, improves normal power generation effect
Rate.
In some instances, a referring to fig. 2, when engine 1 and power motor 2 drive same wheel jointly, hybrid power
Automobile 100 further includes main reducing gear 80 and speed changer 90, wherein engine 1 passes through clutch 6, speed changer 90 and main deceleration
Device 80 outputs power to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle, and power motor 2 passes through main reducing gear 80
Output driving force to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle.Wherein, clutch 6 can be integrated with speed changer 90
Setting.
In other examples, b, drives the first wheel in engine 1 and power motor 2 drives the second wheel referring to fig. 2
When, hybrid vehicle 100 further includes the first speed changer 91 and the second speed changer 92, wherein engine 1 passes through 6 He of clutch
First speed changer 91 outputs power to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle, and power motor 2 passes through the
Two speed changers 92 output driving force to the second wheel such as a pair of rear wheels 72 of hybrid vehicle.Wherein, clutch 6 and first
Speed changer 91 can be integrally disposed.
Further, in some embodiments of the invention, referring to Fig. 2 a, Fig. 2 b, Fig. 4, hybrid vehicle 100 is also wrapped
The second controller 21 of control power motor 2 is included, auxiliary-motor 4 is connected to power battery 3 by auxiliary-motor controller 41, and passes through
Auxiliary-motor controller 41 and second controller 21 are connected to power motor 2.
Specifically, auxiliary-motor controller 41 is connected with second controller 21, power battery 3 respectively, auxiliary-motor controller
41 can have AC-DC converter unit, and auxiliary-motor 4 can produce alternating current when generating electricity, and AC-DC converter unit can generate electricity auxiliary-motor 4
The convert alternating current of generation is high voltage direct current such as 600V high voltage direct current, to realize to the charging of power battery 3, to power electric
At least one of power supply of machine 2.
Similarly, second controller 21 can have DC-AC converter unit, and auxiliary-motor controller 41 can generate electricity auxiliary-motor 4
The convert alternating current of generation is high voltage direct current, the high straightening that DC-AC converter unit can again convert out auxiliary-motor controller 41
Galvanic electricity is transformed to alternating current, to power to power motor 2.
In this embodiment, auxiliary-motor controller 41 has the first DC terminal, and second controller 21 has the second DC terminal.
First DC terminal of auxiliary-motor controller 41 can be connected with power battery 3, so that auxiliary-motor controller 41 passes through the first DC terminal
High voltage direct current is exported to power battery 3 to charge to power battery 3.First DC terminal of auxiliary-motor controller 41 can be with second
Second DC terminal of controller 21 is connected, so that auxiliary-motor controller 41 exports high voltage direct current to second by the first DC terminal
Controller 21 to power motor 2 to power.
Further, a, Fig. 2 b referring to fig. 2, the first DC terminal of auxiliary-motor controller 41 (being not shown in Fig. 2 a, Fig. 2 b)
It can be with electrical equipment 10 (including low voltage equipment and high-voltage electrical equipment) phase in hybrid vehicle with power battery 3
Even to power to electrical equipment 10.It should be noted that the first DC terminal and power battery 3 in auxiliary-motor controller 41 connect
When low voltage equipment, it is both needed to lead to the high voltage direct current and/or auxiliary-motor 4 that power battery 3 exports by DC-DC converter 5
The high voltage direct current for crossing the output of auxiliary-motor controller 41 is converted to low-voltage DC.
Wherein, low voltage equipment includes but is not limited to car light, radio, on-vehicle Bluetooth etc., and high-voltage electrical equipment includes
But it is not limited to compressor of air conditioner, PTC (Positive Temperature Coefficient, positive temperature coefficient) heater
Deng.
It should be noted that in embodiments of the present invention, low pressure can refer to the voltage of 12V (volt) or 24V, high pressure can refer to 600V
Voltage, but not limited to this.
Based on above-mentioned hybrid vehicle, the invention proposes a kind of for electric machine controller in hybrid vehicle
IGBT excess temperature protection method, device.
Fig. 5 is the IGBT excess temperature protection method according to an embodiment of the present invention for electric machine controller in hybrid vehicle
Flow diagram.
As shown in figure 5, for electric machine controller in hybrid vehicle IGBT excess temperature protection method the following steps are included:
S101, obtains the revolving speed of auxiliary-motor, and obtains the temperature of IGBT in auxiliary-motor controller.
Specifically, the revolving speed of auxiliary-motor can be obtained by the speed probe being arranged on auxiliary-motor, and setting can be passed through
The temperature of IGBT in auxiliary-motor controller is obtained in the temperature sensor on auxiliary-motor controller, and auxiliary-motor controller is capable of emitting
The signal of corresponding current state.
Wherein, it should be noted that when hybrid vehicle is run at high speed due to vehicle trouble, such as main DSP crash,
Rotation becomes the failures such as report an error, and auxiliary-motor controller moment can be caused to close wave, so that auxiliary-motor controller, which is in, closes wavy state.
S102, judges whether the temperature of IGBT in the revolving speed and auxiliary-motor controller of auxiliary-motor meets relay shutdown item
Part.
Wherein, relay turn-off criterion can be preset according to experiment, for example, when the temperature of IGBT in auxiliary-motor controller
Greater than preset temperature threshold, and when the revolving speed of auxiliary-motor is greater than preset threshold, can determine whether to meet relay turn-off criterion.
Optionally, rotary speed threshold value value when preset threshold can enter three-phase shortcircuit state with control auxiliary-motor is identical.
In this embodiment, when the revolving speed of auxiliary-motor is greater than preset threshold, also control auxiliary-motor controller carries out three-phase shortcircuit protection.
S103, if the temperature of IGBT meets relay turn-off criterion in the revolving speed of auxiliary-motor and auxiliary-motor controller,
Control relay shutdown.
Wherein, preset temperature threshold can be demarcated as needed.
Specifically, the temperature for obtaining IGBT in the revolving speed and auxiliary-motor controller of auxiliary-motor in real time is preset when revolving speed is greater than
When threshold value and temperature are greater than preset temperature threshold, relay is turned off.
Further, in order to avoid auxiliary-motor be introduced into three-phase shortcircuit state generate high current damage hardware, shutdown after
After electric appliance (calling the function of shutdown relay, relay may not complete switched off at this time), also delay preset time control
Auxiliary-motor controller closes wave, i.e. delay preset time is after thoroughly disconnecting relay, and control auxiliary-motor controller closes wave, so that secondary
IGBT no current flows through in electric machine controller, avoids damage of the high current to IGBT as a result,.
It should be noted that three-phase shortcircuit, i.e. three phase inverter bridge lower bridge arm all turns on, and upper bridge arm is all off, i.e. phase
It is shorted together when in auxiliary-motor triple line, will appear high current in triple line at this time.Three-phase shortcircuit protection is high for auxiliary-motor
IGBT when speed closes wave in protection auxiliary-motor controller.In some embodiments, auxiliary-motor revolving speed is less than or equal to default threshold
Value, when breaking down, auxiliary-motor controller, which is directly entered, closes wavy state；Auxiliary-motor revolving speed is greater than preset threshold, when breaking down,
Auxiliary-motor controller, which is directly entered, closes wavy state, and then auxiliary-motor controller enters three-phase shortcircuit state.
In this embodiment, after relay shutdown, because the temperature of IGBT can reduce rapidly without electric current.It considers
The temperature of IGBT may be cooling water system failure greater than the reason of preset temperature threshold, excess temperature pass occurs to avoid being repeated several times
The failure of disconnected relay can turn off flag bit by a relay to determine whether to relay when software program is arranged
Shutdown processing is carried out, efficiency of code execution is high.
The overheat protector to IGBT in electric machine controller may be implemented in this method as a result, can be avoided auxiliary-motor and is introduced into
The case where three-phase shortcircuit state generation high current damage hardware, occurs, and reduces hardware damage probability, helps to ensure that vehicle row
Safety is sailed, and at low cost, while being convenient for full-vehicle control.
In addition, it is necessary to explanation, for the normal work for guaranteeing motor and electric machine controller, relay is turned off because of excess temperature
Afterwards, need to be after vehicle powers on again and when auxiliary-motor controller IGBT temperature be reduced to default recovery temperature, Cai Kezai secondary control
Relay conducting, to restore control work of the auxiliary-motor controller to auxiliary-motor, wherein default recovery temperature can as needed into
Rower is fixed.
In some embodiments of the invention, in auxiliary-motor controller the temperature of IGBT reach preset temperature threshold it
Before, if the temperature of IGBT reaches third preset temperature in auxiliary-motor controller, the output torque of auxiliary-motor is limited
Control, until the output torque for controlling auxiliary-motor reduces when the temperature of IGBT reaches four preset temperatures in auxiliary-motor controller
To 0, to reduce the temperature of IGBT.Wherein, third preset temperature less than the 4th preset temperature and is greater than default recovery temperature, and the 4th
Preset temperature is less than preset temperature threshold.
Optionally, third preset temperature and the 4th preset temperature can be demarcated as needed.
Further, before the temperature of IGBT reaches preset temperature threshold in auxiliary-motor controller, if auxiliary-motor control
The temperature of IGBT reaches the 5th preset temperature in device processed, then carries out limitation control to the speed of hybrid vehicle, so that mixing
The speed of power vehicle is less than or equal to preset vehicle speed, until the temperature of IGBT is reduced to default recovery in auxiliary-motor controller
When temperature, the speed for controlling hybrid vehicle is restored to the state before limitation control, wherein the 5th preset temperature is greater than the
Four preset temperatures and be less than preset temperature threshold.
In this embodiment, preset vehicle speed is in the three-phase shortcircuit speed and limping speed of IGBT in auxiliary-motor controller
Minimum value, wherein maximum allowable row when limping speed is a driving hybrid vehicle in motor and power motor
Sail speed.
It should be noted that in this embodiment, the temperature of IGBT is real in the revolving speed and auxiliary-motor controller of auxiliary-motor
When obtain, and then can judge whether revolving speed and temperature meet relay turn-off criterion at regular intervals, i.e., revolving speed is whether
Greater than preset threshold, and whether temperature is greater than preset temperature threshold.When the revolving speed of motor is greater than preset threshold, if IGBT temperature
It rises comparatively fast, has little time to carry out limitation control to the output torque of auxiliary-motor and the speed of hybrid vehicle, judge the temperature of IGBT
Degree has been greater than preset temperature threshold, then directly turns off relay.
Optionally, relay can also be set between power motor and second controller, in second controller
IGBT carries out overheat protector, and specific guard method can refer to the overheat protector to IGBT in auxiliary-motor controller.
The overheat protector side IGBT for electric machine controller in hybrid vehicle of the embodiment of the present invention for ease of understanding
Method is illustrated in combination with Fig. 6:
Referring to Fig. 6, after hybrid vehicle starting, the excess temperature protection method of the embodiment of the present invention includes the following steps:
S201 obtains the temperature T of IGBT in the revolving speed S and electric machine controller of motor.
S202 judges whether S, T meet the condition of shutdown relay every the first preset time t 1 such as 1ms, if not,
S203 is thened follow the steps, if so, thening follow the steps S204.
Wherein, turn-off criterion, that is, S of relay is greater than preset threshold and T is greater than preset temperature threshold.
It should be noted that and if T persistently rises when S is greater than preset threshold, then when T is greater than preset temperature threshold,
The function of shutdown relay is called, to turn off the relay being connected between motor and electric machine controller.
S203 judges the current state of relay according to the corresponding flag bit of relay, if relay is currently at suction
Conjunction state thens follow the steps S205, if relay is currently at off state, thens follow the steps S206.
S204 calls the function for disconnecting relay to turn off relay, and goes to step S203.
S205, such as 50ms confirmation primary relay is in attracting state at regular intervals, is inhaled with guaranteeing that relay is in
Conjunction state.
It is appreciated that software can generate a mark after calling relay shutdown function, control program no longer issues suction
The order of relay is closed, until power-off powers on next time, is attracted again.If after calling relay shutdown function, if after
Electric appliance is still in attracting state, then when can determine whether to call relay shutdown function, there are failures.At this point, an also settable prompt
Device, to remind user to be operated manually, to turn off relay.
S206, after calling the function for disconnecting relay, such as 50ms of the second preset time t of delay 2 controls electric machine controller
Control wave is closed, wavy state is closed to guarantee that electric machine controller is currently at, electric machine controller three characteristics of the middle term short circuit is avoided to generate big electricity
Stream damage hardware.
S207, in electric machine controller Guan Bohou, when the temperature of IGBT drops to default recovery temperature hereinafter, and breaking in vehicle
After electricity, when powering on again, the order of attracting electric relay just can be transmitted, so that relay recovery attracting state.
It avoids being repeated several times as a result, and the disconnected relay failure of excess temperature occurs, while the temperature of IGBT being avoided to continue to rise, realize
To the overheat protector of IGBT.
To sum up, the overheat protector side IGBT according to an embodiment of the present invention for electric machine controller in hybrid vehicle
Method can judge whether to turn off corresponding relay according to the temperature of IGBT in the revolving speed and its corresponding electric machine controller of motor,
And then when judgement turns off relay, control relay shutdown, until vehicle re-powers, and in electric machine controller IGBT temperature
When degree is reduced to default recovery temperature, relay conducting can be controlled again, restore auxiliary-motor controller to the control work of auxiliary-motor
Make.Thus, it is possible to realize the overheat protector to IGBT in electric machine controller, electric machine controller can be avoided in three-phase shortcircuit state
The occurrence of lower high current damage IGBT, hardware damage probability is reduced, helps to ensure that vehicle driving safety, and cost
It is low, while being convenient for full-vehicle control.
Further, the invention also provides a kind of computer readable storage mediums, have and are stored in instruction therein,
When the processor of hybrid vehicle executes instruction, hybrid vehicle execute above-described embodiment for hybrid vehicle
The IGBT excess temperature protection method of middle electric machine controller.
To sum up, computer readable storage medium according to an embodiment of the present invention, when the processor of hybrid vehicle executes
When instruction, hybrid vehicle executes the IGBT excess temperature protection method for electric machine controller in hybrid vehicle, Ke Yishi
Now to the overheat protector of IGBT in electric machine controller, it can be avoided electric machine controller high current under three-phase shortcircuit state and damage
The occurrence of IGBT, reduces hardware damage probability, helps to ensure that vehicle driving safety, and at low cost, while convenient for whole
Vehicle control.
Fig. 7 is the side of the IGBT over-temperature protection device of electric machine controller in hybrid vehicle according to an embodiment of the present invention
Block diagram；
As shown in fig. 7, the IGBT over-temperature protection device 200 for electric machine controller in hybrid vehicle includes with lower die
Block: module 210, detection module 220, control module 230 and judgment module 240 are obtained.
Wherein, the revolving speed that module 210 is used to obtain auxiliary-motor is obtained, and obtains the current state of auxiliary-motor controller.Inspection
Survey the temperature that module 220 is used to detect IGBT in auxiliary-motor controller.Judgment module 240 is used to judge the revolving speed and pair of auxiliary-motor
Whether the temperature of IGBT meets relay turn-off criterion in electric machine controller.Control module 230 be used for auxiliary-motor revolving speed and
When the temperature of IGBT meets relay turn-off criterion in auxiliary-motor controller, control relay shutdown.
In one embodiment of the invention, high current damage is generated in order to avoid auxiliary-motor is introduced into three-phase shortcircuit state
Hardware, control module 230 (call the function of shutdown relay, relay may not closed completely at this time in shutdown relay
It is disconnected) after, also delay preset time control auxiliary-motor controller closes wave, i.e. delay preset time is after thoroughly disconnecting relay, control
Auxiliary-motor controller processed closes wave and avoids high current as a result, to IGBT's so that IGBT no current flows through in auxiliary-motor controller
Damage.
It should be noted that re-powered after electricity under vehicle, and in electric machine controller the temperature of IGBT be reduced to it is default
When recovery temperature, relay conducting can be controlled, again to restore control work of the auxiliary-motor controller to auxiliary-motor.
According to one embodiment of present invention, in auxiliary-motor controller the temperature of IGBT reach preset temperature threshold it
Before, when the temperature that control module 230 is also used to the IGBT in auxiliary-motor controller reaches third preset temperature, to the defeated of auxiliary-motor
Torque carries out limitation control out, until controlling auxiliary-motor when the temperature of IGBT reaches four preset temperatures in auxiliary-motor controller
Output torque be decreased to 0, wherein third preset temperature is greater than default recovery temperature, and the 4th preset temperature is default greater than third
Temperature and be less than preset temperature threshold.
Further, before the temperature of IGBT reaches preset temperature threshold in auxiliary-motor controller, control module 230 is also
When temperature for the IGBT in auxiliary-motor controller reaches five preset temperatures, the speed of hybrid vehicle is limited
Control, so that the speed of hybrid vehicle is less than or equal to preset vehicle speed, until the temperature of IGBT reduces in auxiliary-motor controller
Restore to the speed for when presetting recovery temperature, controlling hybrid vehicle to the state before limitation control, wherein the 5th is default
Temperature is greater than the 4th preset temperature and is less than preset temperature threshold.
In this embodiment, preset vehicle speed is in the three-phase shortcircuit speed and limping speed of IGBT in auxiliary-motor controller
Minimum value, wherein maximum allowable row when limping speed is a driving hybrid vehicle in motor and power motor
Sail speed.
Further, after the speed of output torque and hybrid vehicle to auxiliary-motor carries out limitation control,
If the temperature of IGBT still increases to preset temperature threshold or more in auxiliary-motor controller, at this time, it is believed that the defeated of auxiliary-motor
The speed of torque and hybrid vehicle, which carries out limitation control, out cannot be such that the temperature of IGBT in auxiliary-motor controller reduces.
It should be noted that the IGBT overheat protector for electric machine controller in hybrid vehicle of the embodiment of the present invention
Other specific embodiments of device can be found in the above embodiment of the present invention for electric machine controller in hybrid vehicle
The specific embodiment of IGBT excess temperature protection method.
To sum up, the IGBT overheat protector dress according to an embodiment of the present invention for electric machine controller in hybrid vehicle
It sets, can be judged whether to turn off phase according to the temperature of IGBT in the revolving speed and its corresponding electric machine controller of motor by judgment module
The relay answered, so judgement turn off relay when, by control module control relay shutdown, until vehicle again on
Electricity, and when the temperature of IGBT is reduced to default recovery temperature in electric machine controller, relay conducting is controlled by molding block again,
To restore control work of the electric machine controller to motor.Thus, it is possible to realize the overheat protector to IGBT in electric machine controller, energy
It enough avoids the occurrence of that electric machine controller high current under three-phase shortcircuit state damages IGBT, reduces hardware damage probability,
It helps to ensure that vehicle driving safety, and at low cost, while being convenient for full-vehicle control.
Fig. 8 is the block diagram of hybrid vehicle according to an embodiment of the present invention.
As shown in figure 8, the hybrid vehicle 2000 includes above-described embodiment for motor control in hybrid vehicle
The IGBT over-temperature protection device 200 of device processed.
The hybrid vehicle of the embodiment of the present invention, using above-mentioned hybrid vehicle for electricity in hybrid vehicle
The IGBT over-temperature protection device of machine controller may be implemented to can be avoided motor to the overheat protector of IGBT in electric machine controller
Controller the occurrence of high current damage IGBT, reduces hardware damage probability, helps to ensure that under three-phase shortcircuit state
Vehicle driving safety, and it is at low cost, while being convenient for full-vehicle control.
In addition, other of the hybrid vehicle of the embodiment of the present invention are constituted and are acted on to one skilled in the art
Be it is known, for reduce redundancy, be not repeated herein.
It should be noted that in flow charts indicate or logic and/or step described otherwise above herein, for example,
It is considered the order list of the executable instruction for realizing logic function, may be embodied in any computer can
Read in medium, for instruction execution system, device or equipment (such as computer based system, including the system of processor or its
He can be from instruction execution system, device or equipment instruction fetch and the system executed instruction) it uses, or combine these instruction executions
System, device or equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store,
Communicate, propagate, or transport program is for instruction execution system, device or equipment or combines these instruction execution systems, device or sets
The standby and device that uses.The more specific example (non-exhaustive list) of computer-readable medium include the following: have one or
The electrical connection section (electronic device) of multiple wirings, portable computer diskette box (magnetic device), random access memory (RAM), only
It reads memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable light
Disk read-only memory (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or its
His suitable medium, because can then be edited for example by carrying out optical scanner to paper or other media, be interpreted or must
It is handled when wanting with other suitable methods electronically to obtain described program, is then stored in computer storage
In.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (13)
1. a kind of IGBT excess temperature protection method for electric machine controller in hybrid vehicle, the hybrid vehicle include
Engine, power motor, power battery, the auxiliary-motor being connected with the engine, auxiliary-motor controller, the engine pass through
Clutch outputs power to the wheel of the hybrid vehicle, and the power motor is for outputting driving force to the mixing
The wheel of power vehicle, the power battery are used to power to the power motor, the auxiliary-motor and the power battery phase
Even, the auxiliary-motor generates electricity under the drive of the engine, and the auxiliary-motor controller passes through relay and the pair
Motor is connected, and the described method comprises the following steps:
The revolving speed of the auxiliary-motor is obtained, and obtains the temperature of IGBT in the auxiliary-motor controller；
Judge whether the temperature of IGBT in the revolving speed and the auxiliary-motor controller of the auxiliary-motor meets relay turn-off criterion；
If the temperature of IGBT meets the relay turn-off criterion in the revolving speed of the auxiliary-motor and the auxiliary-motor controller,
Then control the relay shutdown.
2. the IGBT excess temperature protection method for electric machine controller in hybrid vehicle as described in claim 1, feature
It is, if the temperature of IGBT is greater than preset temperature threshold in the auxiliary-motor controller, and the revolving speed of the auxiliary-motor is greater than
Preset threshold, then judgement meets the relay turn-off criterion.
3. the IGBT excess temperature protection method for electric machine controller in hybrid vehicle as claimed in claim 2, feature
It is, before the temperature of IGBT reaches the preset temperature threshold in the auxiliary-motor controller, the method also includes:
If the temperature of the auxiliary-motor controller reaches third preset temperature, the output torque of the auxiliary-motor is limited
System control, until controlling the defeated of the auxiliary-motor when temperature of IGBT reaches four preset temperatures in the auxiliary-motor controller
Torque is decreased to 0 out, wherein the third preset temperature is less than the 4th preset temperature, and the 4th preset temperature is less than
The preset temperature threshold.
4. the IGBT excess temperature protection method for electric machine controller in hybrid vehicle as claimed in claim 3, feature
It is, before the temperature of IGBT reaches the preset temperature threshold in the auxiliary-motor controller, the method also includes:
If the temperature of IGBT reaches the 5th preset temperature in the auxiliary-motor controller, to the vehicle of the hybrid vehicle
Speed carries out limitation control, so that the speed of the hybrid vehicle is less than or equal to preset vehicle speed, until the auxiliary-motor
When the temperature of IGBT is reduced to default recovery temperature in controller, the speed for controlling the hybrid vehicle is restored to limitation to control
State before system, wherein the 5th preset temperature is greater than the 4th preset temperature and is less than the preset temperature threshold,
The default recovery temperature is less than the third preset temperature.
5. the IGBT excess temperature protection method for electric machine controller in hybrid vehicle as claimed in claim 4, feature
It is, the preset vehicle speed is the three-phase shortcircuit speed and the minimum value in limping speed of IGBT in the auxiliary-motor controller,
Wherein, when the limping speed is a driving hybrid vehicle in the motor and the power motor most
It is big to allow speed of operation.
6. the IGBT excess temperature protection method for electric machine controller in hybrid vehicle as described in claim 1, feature
It is, further includes:
After controlling the relay shutdown preset time, controls the auxiliary-motor controller and close wave.
7. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program quilt
It is realized when processor executes such as the IGBT of any of claims 1-6 for electric machine controller in hybrid vehicle
Excess temperature protection method.
8. a kind of IGBT over-temperature protection device for electric machine controller in hybrid vehicle, the hybrid vehicle include
Engine, power motor, power battery, the auxiliary-motor being connected with the engine, auxiliary-motor controller, the engine pass through
Clutch outputs power to the wheel of the hybrid vehicle, and the power motor is for outputting driving force to the mixing
The wheel of power vehicle, the power battery are used to power to the power motor, the auxiliary-motor and the power battery phase
Even, the auxiliary-motor generates electricity under the drive of the engine, and the auxiliary-motor controller passes through relay and the pair
Motor is connected, and the protective device includes:
Module is obtained, for obtaining the revolving speed of the auxiliary-motor；
Detection module, for detecting the temperature of IGBT in the auxiliary-motor controller；
Judgment module, in the revolving speed and the auxiliary-motor controller for judging the auxiliary-motor temperature of IGBT whether meet after
Electric appliance turn-off criterion；
Control module, for when the revolving speed and the temperature meet relay turn-off criterion, controlling the relay shutdown.
9. the IGBT over-temperature protection device for electric machine controller in hybrid vehicle as claimed in claim 8, feature
It is, before the temperature of IGBT reaches the preset temperature threshold in the auxiliary-motor controller, the control module is also used
In:
When the temperature of the auxiliary-motor controller reaches third preset temperature, the output torque of the auxiliary-motor is limited
Control, until controlling the output of the auxiliary-motor when temperature of IGBT reaches four preset temperatures in the auxiliary-motor controller
Torque is decreased to 0, wherein the third preset temperature is less than the 4th preset temperature, and the 4th preset temperature is less than institute
State preset temperature threshold.
10. the IGBT over-temperature protection device for electric machine controller in hybrid vehicle as claimed in claim 9, feature
It is, before the temperature of IGBT reaches the preset temperature threshold in the auxiliary-motor controller, the control module is also used
In:
When the temperature of IGBT reaches five preset temperatures in the auxiliary-motor controller, to the speed of the hybrid vehicle
Limitation control is carried out, so that the speed of the hybrid vehicle is less than or equal to preset vehicle speed, until the auxiliary-motor control
When the temperature of IGBT is reduced to the default recovery temperature in device processed, the speed for controlling the hybrid vehicle is restored to limiting
State before control, wherein the 5th preset temperature is greater than the 4th preset temperature and is less than the preset temperature threshold
Value, the default recovery temperature are less than the third preset temperature.
11. the IGBT over-temperature protection device for electric machine controller in hybrid vehicle as claimed in claim 10, special
Sign is that the preset vehicle speed is the three-phase shortcircuit speed and the minimum in limping speed of IGBT in the auxiliary-motor controller
Value, wherein when the limping speed is a driving hybrid vehicle in the motor and the power motor
Maximum allowable speed of operation.
12. the IGBT over-temperature protection device for electric machine controller in hybrid vehicle as claimed in claim 8, feature
It is, the control module is also used to:
After controlling the relay shutdown preset time, controls the auxiliary-motor controller and close wave.
13. a kind of hybrid vehicle, which is characterized in that including dynamic for mixing as described in any one of claim 7-12
The IGBT over-temperature protection device of electric machine controller in power automobile.
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| CN201711404057.8A CN109962461B (en) | 2017-12-22 | 2017-12-22 | IGBT over-temperature protection method and device for hybrid electric vehicle and motor controller |
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| CN201711404057.8A CN109962461B (en) | 2017-12-22 | 2017-12-22 | IGBT over-temperature protection method and device for hybrid electric vehicle and motor controller |
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| CN109962461B CN109962461B (en) | 2020-09-15 |
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