CN107666269A - A kind of heat protection method based on current sample electric machine controller - Google Patents
A kind of heat protection method based on current sample electric machine controller Download PDFInfo
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- CN107666269A CN107666269A CN201710819840.4A CN201710819840A CN107666269A CN 107666269 A CN107666269 A CN 107666269A CN 201710819840 A CN201710819840 A CN 201710819840A CN 107666269 A CN107666269 A CN 107666269A
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- motor
- thermal protection
- electric machine
- machine controller
- current sample
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
A kind of heat protection method based on current sample electric machine controller disclosed by the invention, it is by electric machine controller real-time sampling motor operating current, with reference to software algorithm and strategy, E=k*I2* t (k is constant, and I is motor operating current, and t is motor operating time), for having hardware thermal protector motor and without hardware Thermal protection motor, realizing thermal protection for motors function, and guarantee anti-pinch reverse function is preferential, support personnel's security of the lives and property.The present invention ensures that anti-pinch reverse function is preferential and motor can be allowed to have given play to performance to there is the motor of hardware thermal protector, by software Thermal protection, avoids the excessive cost increase of choice of electrical machine performance, causes to waste；The present invention ensures that anti-pinch reverse function is preferential and motor can be protected not to be burned out, while avoid increasing the extra cost of hardware thermal protector to the motor without hardware thermal protector by software Thermal protection.
Description
Technical field
The present invention relates to technical field of vehicle safety, more particularly to a kind of Thermal protection based on current sample electric machine controller
Method.
Background technology
In the process of running, there are various losses (iron loss, copper loss etc.) in motor, these losses are converted into heat energy, make motor
The temperature rise at each position, eventually exceeds environment temperature.If the temperature of motor is too high, insulating materials aging can be accelerated, make insulation
Performance reduces, and even burns motor when serious.
Thermal protection for motors be in order to prevent motor in overload, improper ventilation, environment temperature are too high or the number of starts excessively frequency
Overheat, a kind of safeguard measure of infringement motor insulation, are in motor operation course, prevent accumulation of heat from leading caused by the reason such as numerous
Cause one kind " bottom line " safeguard procedures of burning apparatus.
Conventional motors Thermal protection scheme is by direct temperature monitoring method, when temperature rise, deenergization, realizes hardware
Thermal protection.Such as motor internal has bimetal leaf heat portective switch, it is embedded in machine winding, when environment temperature (motor around
Group) when being increased to set temperature value, hardware is disconnected rapidly, and contact is opened, and is cut off the electricity supply, and is reached protection motor purpose, is kept away
Exempt from dangerous generation.
Study hotspot is had become to the Thermal protection of motor at present, thermal protection for motors also develops towards intelligent direction.Together
When with automobile industry development, the application of motor in the car is more and more extensive, and the role taken on is also more and more important, such as：
Four Car window electric machines, skylight motor, electronic sideslip door motor, electronic meeting pedal motor, electric tail gate motor etc..Above-mentioned field electricity
The application and control of machine are, it is necessary to often open and close (i.e. lifting, slip, unfolded, lifting closure etc.), if without motor heat
Defencive function, it is small, motor is burnt, it is serious even to trigger in-car fire, life-threatening property safety.
Another key point, the motor of above-mentioned automotive field application, according to relevant laws and regulations, vehicle manufacturers or industry
It is required that vehicle window is closed, skylight is closed, side sliding door is turned on and off, meeting pedal exhibition on or off is folded, electric tail gate is opened or closed
During closing etc., it is required to consider protection staff safety, avoids personnel from being crushed, protect occupant safety.So as to which above-mentioned automobile is led
The motor of domain application is, it is necessary to which controlled motor is out of service or reversion is run, then controlled motor system needs to have pinch resistant functionality.
When producing anti-pinch reversion, if in the Umklapp process, 1. if motor does not carry heat portective switch, continue to invert
Then motor has and burnt for operation；2. if the heat portective switch carried on motor works, circuit will be cut, motor will be in disconnected
Open state, anti-pinch reversion is caused to stop, it is impossible to play a part of pinch resistant functionality, above-mentioned two situations, can there is greatly peace
Full blast danger.
In summary, electric machine controller needs to have software heat protection function.
Nowadays in the market electric machine controller typically also possesses software heat protection function, such as：By limiting the operation frequency
Scheme, protection motor can be reached under normal circumstances, also can guarantee that pinch resistant functionality.But the scheme that the frequency is operated by limiting lacks
Fall into：It is 1. fairly simple " roughly, not in view of environmental factor and motor performance change difference itself；2. the limitation operation frequency influences
Customer Experience；3. motor performance itself is not played, performance is superfluous；4. in extreme circumstances, it may appear that multi-pass operation or length
Time etc. is to be operated, causes customer to complain.
The content of the invention
The technical problems to be solved by the invention are to be directed to the existing electric machine controller Thermal protection work(with pinch resistant functionality
Can imperfection and a kind of heat protection method based on current sample electric machine controller is provided, to ensure pinch resistant functionality, lift customer
Experience, protect occupant's security of the lives and property.
The technical problems to be solved by the invention can be achieved through the following technical solutions：
A kind of heat protection method based on current sample electric machine controller, the motor controller system drive including motor
Executing agency and electric machine controller, the electric machine controller drive the motor drive actuator operation, the motor control
There is a motor operating current sample circuit and a micro-control unit in device, it is characterised in that built in the micro-control unit
One thermal protection for motors program, the thermal protection for motors program are specifically：
When motor operation, thermal protection for motors program described first is taken according to the motor operating current sample circuit
The motor drive actuator in motor operating current I and equation below (1) calculate the increased heat of motor institute:
EIncrease=k*I2*t； (1)
Secondly, the thermal protection for motors program calculates the electricity in the motor drive actuator according to equation below (2)
The heat that machine is radiated：
ERadiating=M*t (2)
Then the thermal protection for motors program calculates the motor in the motor drive actuator according to equation below (3)
The heat accumulated：
EAccumulation=EIncrease-ERadiating (3)
Then the E that the thermal protection for motors program will be calculatedAccumulationWith built-in Thermal protection threshold value EThermal protection thresholding、
EOne-level Thermal protection thresholding、ETwo level Thermal protection thresholdingIt is compared：Work as EAccumulation＞ EThermal protection thresholding, the micro-control unit enters Thermal protection state；Work as EAccumulation＞
EOne-level Thermal protection thresholding, the micro-control unit enters one-level Thermal protection state, and now, the microprocessing unit only allows the motor to drive
Motor in dynamic executing agency performs the one direction operation being turned on and off, and forbids the motor in the motor drive actuator
Perform the twocouese operation opened and closed；Work as EAccumulation＞ ETwo level Thermal protection thresholding, the micro-control unit enters two level Thermal protection state,
Now, the microprocessing unit forbids the motor in the motor drive actuator to perform any operation；
In above-mentioned formula, k, M are calibration value, are chosen by the system calibrating situation；T is motor operating time.
In a preferred embodiment of the invention, after the micro-control unit enters one-level Thermal protection state, it is moved back
The time for going out one-level Thermal protection state is：
T1=(EAccumulation-EOne-level Thermal protection thresholding)/M≥8.33S。
In a preferred embodiment of the invention, after the micro-control unit enters two level Thermal protection state, it is moved back
The time for going out two level Thermal protection state is：
T2=(EAccumulation-EOne-level Thermal protection thresholding)/M≥50S。
In a preferred embodiment of the invention, the motor drive actuator is the vehicle window liter of driving window lifting
Electronic side sliding door mechanism, the driving pedal expansion folding that device, the skylight mechanism that driving skylight opens and closes, driving side door slide drop
Folded electronic meeting pedal mechanism or the electric tail gate mechanism of driving tail-gate lifting closure.
In a preferred embodiment of the invention, electric machine controller attended operation button, network-bus and the motor
Drive executing agency etc..
In a preferred embodiment of the invention, the network-bus be LIN network-bus or CAN network bus and its
Its network-bus mode.
In a preferred embodiment of the invention, the electric machine controller includes vehicle window controller, louver controller, electricity
Dynamic sideslip door controller, meeting pedal controller or tail-gate controller etc..
In a preferred embodiment of the invention, the electric machine controller also includes filter circuit and power circuit, institute
Power circuit is stated to power to motor operating current sample circuit, filter circuit and micro-control unit；The motor operating current is adopted
Sample circuit samples to the motor operating current in motor drive actuator, and the obtained electric current of sampling is converted to sampling electricity
Pressure, sampled voltage calculate the current running current of the motor in motor drive actuator by micro-control unit.
As a result of technical scheme as above, the present invention can avoid on the premise of motor possesses hardware Thermal protection
When anti-pinch inverts, motor not running situation.Possesses thermal protection for motors function, motor does not run feelings when being avoided that anti-pinch reversion
Condition, meet motor operation actual conditions, do not cause waist performance, reach the purpose of technology cost declining.
Brief description of the drawings
Fig. 1 is a kind of tactful schematic diagram of the heat protection method based on current sample electric machine controller of the present invention.
Fig. 2 is a kind of schematic flow sheet of the heat protection method based on current sample electric machine controller of the present invention.
Embodiment
A kind of heat protection method based on current sample electric machine controller of the present invention, its electric machine control system include motor
Drive executing agency (window regulator, skylight mechanism, electronic side sliding door mechanism, electronic meeting pedal mechanism, electric tail gate mechanism
Deng) and electric machine controller (vehicle window controller, louver controller, electronic sideslip door controller, meeting pedal controller, tail-gate control
Device processed etc.), the electric machine controller drives the motor driving to perform operation, and the motor mechanism drive mechanism drives vehicle window liter
Drop, side door slip, pedal unfolded, tail-gate lifting closure etc., the electric machine controller (vehicle window controller, louver controller,
Electronic sideslip door controller, meeting pedal controller, tail-gate controller etc.) attended operation button, network-bus (LIN, CAN) and
Motor drive actuator etc..
Thermal protection for motors strategy is sketched referring to Fig. 1：
1) motor temperature exceedes calibration value EOne-level Thermal protection thresholding, one-level Thermal protection state will be entered, a permission motor performs folk prescription
Operated to (being turned on and off), forbid motor to perform twocouese (opening and closing) operation (triggering anti-pinch, it is allowed to which motor reversal is transported
OK)；
2) motor temperature exceedes calibration value ETwo level Thermal protection thresholding(ETwo level Thermal protection thresholding＞ EOne-level Thermal protection thresholding), two level Thermal protection shape will be entered
State, forbid motor to perform twocouese (opening and closing) operation (if triggering anti-pinch, it is allowed to which motor reversal is run)；
After motor temperature recovers normal, non-thermal guard mode will be entered, open and close functional rehabilitation.
Electric machine controller circuit includes drive and control of electric machine sample circuit, filter circuit, power circuit, micro-control unit,
Power circuit is powered to motor driving controling circuit and micro-control unit；Control sample circuit enters to the operating current of electric motor of automobile
Row sampling, the obtained electric current of sampling are converted to sampled voltage, and sampled voltage calculates the current fortune of motor by micro-control unit
Row electric current.
Because electric machine controller software has motor model, can be protected by current detecting (calculating).It is in general, electric
The working condition of machine has 2 kinds of working conditions, that is, runs febrile state, normality radiating state.Micro-control unit inside controller, lead to
Cross collection and demarcation can determine that environment temperature, so that it is determined that motor radiating parameter；Motor radiating and environment temperature, motor characteristic phase
Close.In addition motor operating current has real-time, it is ensured that the increased energy state of motor is accurate.
According to 2 kinds of working conditions of motor, corresponding motor mathematical model is established, i.e. motor operation temperature rising model, motor is normal
State heat dissipation model, specific detailed strategy are as follows.
One:Into software Thermal protection condition
According to E=k*I2* t (k is calibration value, and I is motor operating current, and t is motor operating time)；
When motor operation, the increased ENERGY E of motorIncrease=k*I2* t, while motor is also outside according to fixed radiating rate
Radiating, ERadiating=M*t (M is constant, and t is the time)；Motor accumulation heat is EAccumulation=EIncrease-ERadiating, work as EAccumulation>EThermal protection thresholdingWhen, motor
Controller enters software Thermal protection；
Two：Into one-level heat protection function
As anti-pinch EAccumulation>EOne-level Thermal protection thresholdingInto after software one-level Thermal protection, a permission motor performs one direction and (opens or close
Close) operation, forbid motor to perform twocouese (opening and closing) operation.(triggering anti-pinch, it is allowed to which motor reversal is run)；
Three：Into two level heat protection function
As anti-pinch EAccumulation>ETwo level Thermal protection thresholdingInto after software two level Thermal protection, motor is forbidden to perform twocouese (opening and closing)
Operation (triggering anti-pinch, it is allowed to which motor reversal is run)；
Four：Exit software Thermal protection condition
After motor is out of service, when the ENERGY E of motor accumulationAccumulation<EDemarcate thresholding, vehicle window recovery normal function
Calibrating parameters are at present：
K=1；M=12；EThermal protection thresholding=1900, EOne-level Thermal protection thresholding=2000, ETwo level Thermal protection thresholding=2500,
After (being turned on and off) Thermal protection into one direction, the time of Thermal protection is exited：
T=(EAccumulation-EOne-level Thermal protection thresholding)/M≥8.33S
Into the time for closing Thermal protection backed off after random Thermal protection：
T=(EAccumulation-ETwo level Thermal protection thresholding)/M≥50S
The present invention based on the heat protection method idiographic flow of current sample electric machine controller referring to Fig. 2.
For there is the motor of hardware thermal protector, then E is demarcatedTwo level Thermal protection thresholding＞ motorsHardware thermal protector；
For the motor without hardware thermal protector, then E is demarcatedTwo level Thermal protection thresholding＞ motorsCritical limit state。
The present invention improvements be：By electric machine controller sample motor running current, with reference to software algorithm and tactful E
=k*I2* t (k is calibration value, and I is motor operating current, and t is motor operating time), for have hardware thermal protector motor and
Without hardware Thermal protection motor, thermal protection for motors function is realized, and ensures that anti-pinch reverse function is preferential, support personnel's lives and properties
Safety.
To there is the motor of hardware thermal protector, ensure that anti-pinch reverse function is preferential by software Thermal protection and can allow motor
Performance has been given play to, has avoided performance is superfluous from wasting；
To the motor without hardware thermal protector, ensure that anti-pinch reverse function is preferential and can protect electricity by software Thermal protection
Machine will not be burned out, while avoid increasing the extra cost of hardware thermal protector.
Claims (8)
1. a kind of heat protection method based on current sample electric machine controller, the motor controller system includes motor driving and held
Row mechanism and electric machine controller, the electric machine controller drive the motor drive actuator operation, the electric machine controller
Inside there is a motor operating current sample circuit and a micro-control unit, it is characterised in that one built in the micro-control unit
Thermal protection for motors program, the thermal protection for motors program are specifically：
When motor operation, institute that thermal protection for motors program described first is taken according to the motor operating current sample circuit
State the motor operating current I in motor drive actuator and equation below (1) calculates the increased heat of motor institute:
EIncrease=k*I2*t； (1)
Secondly, the thermal protection for motors program calculates the motor institute in the motor drive actuator according to equation below (2)
The heat of radiating：
ERadiating=M*t (2)
Then the thermal protection for motors program calculates the motor in the motor drive actuator according to equation below (3) and tired out
Long-pending heat：
EAccumulation=EIncrease-ERadiating (3)
Then the E that the thermal protection for motors program will be calculatedAccumulationWith built-in Thermal protection threshold value EThermal protection thresholding、
EOne-level Thermal protection thresholding、ETwo level Thermal protection thresholdingIt is compared：Work as EAccumulation＞ EThermal protection thresholding, the micro-control unit enters Thermal protection state；Work as EAccumulation＞
EOne-level Thermal protection thresholding, the micro-control unit enters one-level Thermal protection state, and now, the microprocessing unit only allows the motor to drive
Motor in dynamic executing agency, which performs, is turned on and off unidirectional operation, forbids the motor in the motor drive actuator
Perform shutoff operation；Work as EAccumulation＞ EOne-level Thermal protection thresholding, the micro-control unit enters two level Thermal protection state, now, the microprocessor
Unit forbids the motor in the motor drive actuator to perform opening and closing operation；
In above-mentioned formula, k, M are calibration value, such as：K=1, M=12, chosen by the system calibrating situation；T is motor
Run time.
2. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that work as institute
Micro-control unit is stated into after one-level Thermal protection state, it exits the time of one-level Thermal protection state and is：
T1=(EAccumulation-EOne-level Thermal protection thresholding)/M≥8.33S。
3. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that work as institute
Micro-control unit is stated into after two level Thermal protection state, it exits the time of two level Thermal protection state and is：
T2=(EAccumulation-EOne-level Thermal protection thresholding)/M≥50S。
4. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that described
Motor drive actuator is the window regulator of driving window lifting, the skylight mechanism of driving skylight open and close, driving
Electronic side sliding door mechanism, the electronic meeting pedal mechanism of driving pedal unfolded or the driving tail-gate lifting closure that side door slides
Electric tail gate mechanism.
5. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that described
Electric machine controller attended operation button, network-bus and and motor drive actuator.
6. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that described
Network-bus is LIN network-bus or CAN network bus.
7. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that described
Electric machine controller vehicle window controller, louver controller, electronic sideslip door controller, meeting pedal controller or tail-gate controller.
8. a kind of heat protection method based on current sample electric machine controller as claimed in claim 1, it is characterised in that described
Electric machine controller also includes filter circuit and power circuit, and the power circuit is to motor operating current sample circuit, filtered electrical
Road and micro-control unit power supply；The motor operating current sample circuit is to the motor operating current in motor drive actuator
Sampled, the obtained electric current of sampling is converted to sampled voltage, and sampled voltage is held by micro-control unit to calculate motor driving
The current running current of motor in row mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819840.4A CN107666269B (en) | 2017-09-08 | 2017-09-08 | Thermal protection method based on current sampling motor controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819840.4A CN107666269B (en) | 2017-09-08 | 2017-09-08 | Thermal protection method based on current sampling motor controller |
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| Publication Number | Publication Date |
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| CN107666269A true CN107666269A (en) | 2018-02-06 |
| CN107666269B CN107666269B (en) | 2021-01-15 |
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ID=61097040
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710819840.4A Active CN107666269B (en) | 2017-09-08 | 2017-09-08 | Thermal protection method based on current sampling motor controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005642A (en) * | 2019-12-26 | 2020-04-14 | 中山市领越电子科技有限公司 | Anti-clamping device for automobile window |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3120140A1 (en) * | 2021-02-25 | 2022-08-26 | Psa Automobiles Sa | Method and system for managing the thermal protection of electromechanical devices on board a motor vehicle |
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| JPH0654572A (en) * | 1992-07-31 | 1994-02-25 | Omron Corp | Heat protection apparatus for motor |
| CN203050353U (en) * | 2012-08-16 | 2013-07-10 | 东方久乐汽车电子（上海）有限公司 | Car window anti-pinching control circuit based on ripple wave and current detection |
| CN103248012A (en) * | 2013-04-26 | 2013-08-14 | 深圳万讯自控股份有限公司 | Thermal overload protection method and device with complete thermal memory function for AC motor |
| CN105207569A (en) * | 2015-10-26 | 2015-12-30 | 重庆长安汽车股份有限公司 | Over-temperature protection method and device for motor of electric vehicle and electric vehicle |
| CN105321934A (en) * | 2014-05-27 | 2016-02-10 | Hkr苏弗汽车有限责任两合公司 | Circuit arrangement for thermal protection of power semiconductor |
| CN106998170A (en) * | 2016-08-31 | 2017-08-01 | 南京奥联汽车电子技术有限公司 | Direct current generator method for excessive heating protection and implementation step based on feedback current |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654572A (en) * | 1992-07-31 | 1994-02-25 | Omron Corp | Heat protection apparatus for motor |
| CN203050353U (en) * | 2012-08-16 | 2013-07-10 | 东方久乐汽车电子（上海）有限公司 | Car window anti-pinching control circuit based on ripple wave and current detection |
| CN103248012A (en) * | 2013-04-26 | 2013-08-14 | 深圳万讯自控股份有限公司 | Thermal overload protection method and device with complete thermal memory function for AC motor |
| CN105321934A (en) * | 2014-05-27 | 2016-02-10 | Hkr苏弗汽车有限责任两合公司 | Circuit arrangement for thermal protection of power semiconductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111005642A (en) * | 2019-12-26 | 2020-04-14 | 中山市领越电子科技有限公司 | Anti-clamping device for automobile window |
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| CN107666269B (en) | 2021-01-15 |
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