CN104340265A - Electronic control apparatus - Google Patents
Electronic control apparatus Download PDFInfo
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- CN104340265A CN104340265A CN201410359714.1A CN201410359714A CN104340265A CN 104340265 A CN104340265 A CN 104340265A CN 201410359714 A CN201410359714 A CN 201410359714A CN 104340265 A CN104340265 A CN 104340265A
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- Prior art keywords
- temperature
- threshold value
- self
- normal termination
- insurance
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/0481—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures
- B62D5/0484—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures for reaction to failures, e.g. limp home
Abstract
An electronic control apparatus. Even a power supply cannot be self-protected due to abnormity and temperature estimation treatment is interrupted, faults caused by overheating of an electric motor and the like can also be prevented. Control output for controlling the electric motor is limited by comparing an estimated estimation temperature of the electric motor based on a measured value of a thermistor by a temperature estimation portion with an overheating protection temperature threshold stored in a threshold storage portion. When an IG switch is disconnected, the power supply is self-protected via a power supply self-protection portion, an already normally terminated order is written into a normal termination storage portion when specified conditions are subsequently satisfied, and self-protection of the power supply based on the power supply self-protection portion is terminated. When the IG switch is connected, if the already normally terminated order is stored in the normal termination storage portion, a normal threshold is overwritten into the threshold storage portion as the overheating protection temperature threshold, and if the already normally terminated order is not stored in the normal termination storage portion, an abnormal threshold is overwritten into the threshold storage portion.
Description
Technical field
The present invention relates to a kind of electronic control package, described electronic control package, based on the observed reading of the Temperature measuring section be arranged near Temperature estimate object, estimates the temperature of Temperature estimate object, after source switch disconnects, also self-insurance power supply, continues the estimation of the temperature of Temperature estimate object.
Background technology
Such as, giving in the electronic control package of the electric motor driven power steering of steering auxiliary force by the steering control system of electro-motor to automobile, disclosed in patent documentation 1 ~ 4, just like lower device: when can not the temperature of direct measuring object thing, based on the observed reading of the Temperature measuring section be arranged near object, estimate the temperature of object.In this electronic control package, when source switch is connected, based on estimate temperature carry out electro-motor overheating protection control, but in order to source switch disconnect after or after abending also from overheated middle protection electro-motor, take various countermeasures.
The electronic control package of patent documentation 1 possesses: power supply self-insurance parts, self-insurance power supply; And CPU, estimate the temperature of electrical motor according to the current value flowing through electrical motor, based on this estimation temperature, determine the current limit value of electro-motor.Then, after blocking the power supply supply to electrical motor, CPU carries out computing based on the estimation temperature of electrical motor to the self-insurance time, and during till this self-insurance time, power supply self-insurance parts self-insurance power supply, CPU continues Temperature estimate process etc.
The electronic control package of patent documentation 2 possesses: power supply self-insurance parts, and the power supply that can draw oneself up after carrying out power connection by button switch (key switch) stops; And Temperature estimate parts, estimate the temperature of electro-motor, the temperature of carrying out electro-motor based on this estimation temperature controls.Then, even if by button switch input power danger signal, during estimation temperature does not become below specified value, power supply self-insurance parts self-insurance power supply, Temperature estimate parts continue Temperature estimate process.
The electronic control package of patent documentation 3 possesses: Temperature estimate parts, and the detected value based on temperature sensor estimates the temperature of electro-motor and exothermic body; And EEPROM.Then, when at flame-out (engine stall), engine stops, by the estimation thermograph of Temperature estimate parts to EEPROM, when to restart thereafter bearing circle (handle) and operate, among the detected temperatures of temperature sensor and the estimation temperature that records in EEPROM, a side of high temperature is set to the initial value carrying out Temperature estimate for Temperature estimate parts.
The electronic control package of patent documentation 4, except the such power supply self-insurance parts of patent documentation 2 and Temperature estimate parts, also possesses Temperature estimate state storage component and initial value set parts.The data of the regulation representing the state of Temperature estimate process, before Temperature estimate parts stop, being stored into storage part by Temperature estimate state storage component.Initial value set parts when ignition lock (ignition switch) is turned on again and Temperature estimate parts have carried out work, based on the initial value of the data setting Temperature estimate value of the regulation of storage part.
Prior art document
Patent documentation
[patent documentation 1] (Japanese) Patent Laid-Publication 6-247324 publication
[patent documentation 2] (Japan) JP 2002-362393 publication
[patent documentation 3] (Japan) JP 2005-263010 publication
[patent documentation 4] (Japan) table 2008/153162 publication again
In the electronic control package of above-mentioned patent documentation 1 and 2, after source switch disconnects, self-insurance power supply, continues Temperature estimate process., now, if certain abnormal generation that the dismounting of such as battery and the broken string of power lead etc. are such, and become the self-insurance can not carrying out the power supply of electronic control package, then cause Temperature estimate process to be interrupted.Then, if source switch is switched on after this short time, then suitably can not carry out overheating protection control, there is overheating protection object (electro-motor) due to the overheated and worry of et out of order.To this, in above-mentioned patent documentation 3 and 4, after source switch is switched on, based on the Temperature estimate information before the stopping of last time, set Temperature estimate initial value.
Summary of the invention
Problem of the present invention is to provide a kind of electronic control package, even if described control setup becomes the self-insurance that can not carry out power supply due to exception and Temperature estimate process is interrupted, overheating protection object also can be prevented due to overheated and et out of order.
Electronic control package of the present invention possesses: control part, based on the input information of regulation, controls control object; Temperature measuring section, is arranged near Temperature estimate object; Temperature estimation section, based on the observed reading of Temperature measuring section, estimates the temperature of Temperature estimate detected object; Threshold value storage part, stores overheating protection temperature threshold; Export-restriction portion, based on the result that the estimation temperature to temperature estimation section and the overheating protection temperature threshold that stores in threshold value storage part compare, restriction is used for control part and exports the control that control object controls; Power supply self-insurance portion, self-insurance power supply after source switch disconnects; Normal termination storage part, stores the order of normal termination; Normal termination write section, is written to normal termination storage part by the order of normal termination; Condition criterion portion, determines whether to meet the defined terms set based on the observed reading of Temperature measuring section and the estimation temperature of temperature estimation section; Normal termination confirmation unit, confirms the order whether storing normal termination in normal termination storage part; And threshold value write section, using threshold value time normal or abnormal time threshold value be written to threshold value storage part as overheating protection temperature threshold, described abnormal time threshold value when being more normal than this threshold value be more strictly detected the threshold value of Warm status.Then, after source switch disconnects, when condition criterion portion is judged to meet defined terms, the order of normal termination is written to normal termination storage part by normal termination write section, and power supply self-insurance portion stops the self-insurance of power supply.In addition, when source switch is connected, when normal termination confirmation unit confirms the order storing normal termination in normal termination storage part, threshold value time normal is override threshold value storage part by threshold value write section, when normal termination confirmation unit confirms the order not storing normal termination in normal termination storage part, threshold value during exception is override threshold value storage part by threshold value write section.
According to above-mentioned; even if due to the generation of exception; become the self-insurance can not carrying out power supply; Temperature estimate process is interrupted; also because of when the connection of source switch thereafter; in normal termination storage part, do not store the order of normal termination, therefore, time abnormal, threshold value is stored in threshold value storage part as overheating protection temperature threshold.Thus, based on the result compared with threshold value time abnormal the estimation temperature of temperature estimation section, strictly can limit and for control part, the control that control object controls be exported, prevent overheating protection object due to overheated et out of order.
In addition, in the present invention, also can be if that from threshold value during exception being override through specified time threshold value storage part, then threshold value time normal is override threshold value storage part by threshold value write section in above-mentioned electronic control package.
In addition, in the present invention, in above-mentioned electronic control package also can be, this electronic control package also possesses: self-insurance time setting part, based on the difference of the observed reading of Temperature measuring section and the estimation temperature of temperature estimation section, set the self-insurance time of power supply self-insurance portion's self-insurance power supply, condition criterion portion judges disconnect at source switch and whether have passed through the self-insurance time, as defined terms under power supply self-insurance portion's self-insurance state of power supply.
In addition, in the present invention, also can be that condition criterion portion judges whether the difference of the observed reading of Temperature measuring section and the estimation temperature of temperature estimation section has become and is less than specified value, as defined terms in above-mentioned electronic control package.
And then in the present invention, above-mentioned electronic control package also can be the electric power-steering controller carried on vehicle.Now, control object and Temperature estimate object are made up of electro-motor, and described electro-motor controls it by electric power-steering controller and drives, and to produce steering auxiliary force, source switch is made up of the ignition lock of vehicle.
According to the present invention, provide a kind of electronic control package, even if described electronic control package becomes due to abnormal the self-insurance can not carrying out power supply, Temperature estimate process is interrupted, and object also can be prevented due to overheated et out of order.
Accompanying drawing explanation
Fig. 1 is the block scheme of the electronic control package of embodiments of the present invention.
Fig. 2 A is the diagram of circuit of the action of the electronic control package representing Fig. 1.
Fig. 2 B is the diagram of circuit of the action of the electronic control package representing Fig. 1.
Fig. 3 is the diagram of circuit of the details of auxiliary (assist) control treatment representing Fig. 2 A.
Fig. 4 is the diagram of circuit of the details of the self-insurance time setting process representing Fig. 2 B.
Time diagram when Fig. 5 is the electronic control package of Fig. 1 normal.
Time diagram when Fig. 6 is the exception of the electronic control package of Fig. 1.
Fig. 7 is the diagram of circuit of the action of the electronic control package of the embodiment representing other.
Label declaration
2 power supply self-insurance portions
5 thermally dependent resistors
6 motor control part
7 export-restriction portions
8 temperature estimation section
9 threshold value storage parts
10 self-insurance time setting parts
11 normal termination storage parts
11a normal termination mark
12 normal termination write sections
13 condition criterion portions
14 normal termination confirmation units
15 threshold value write sections
18 IG (igniting) switch
20 electro-motors
100 electronic control packages
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.In the various figures, identical label is given to the part of identical part or correspondence.
First, the structure of the electronic control package 100 of present embodiment is described with reference to Fig. 1.
Fig. 1 is the block scheme of electronic control package 100.The ECU (electric power-steering controller) that electronic control package 100 is used by the electric motor driven power steering system 200 of automobile is formed.Electronic control package 100 drives electro-motor 20 by the electric power of battery 30, gives steering auxiliary force to the steering control system of automobile.
In electronic control package 100, have: microcomputer (micro computer) 1, power supply self-insurance portion 2, motor driving part 3, current detecting part 4 and thermally dependent resistor 5.In microcomputer 1, have: motor control part 6, export-restriction portion 7, temperature estimation section 8, threshold value storage part 9, self-insurance time setting part 10, normal termination storage part 11, normal termination write section 12, condition criterion portion 13, normal termination confirmation unit 14, threshold value write section 15, threshold value confirmation unit 16 and time measurement portion 17.
Electric power is supplied via IG (igniting) switch 18 pairs of electronic control packages 100 from battery 30.By the path different from IG switch 18, supply electric power from battery 30 pairs of motor driving parts 3.
For the steering moment of torsion of the never graphic torque sensor input redirect of motor control part 6, and the never graphic car speed sensor input speed of a motor vehicle.Motor control part 6, based on inputted steering moment of torsion and the speed of a motor vehicle, sets the current instruction value (controlling to export) for controlling electro-motor 20.
Motor driving part 3, based on the current instruction value inputted via export-restriction portion 7 from motor control part 6, by current flowing to electro-motor 20, drives electro-motor 20.Current detecting part 4 detects the current value flowing to electro-motor 20, outputs to motor control part 6.Motor control part 6, based on the current value flowing to electro-motor 20, carries out controlled reset via motor driving part 3 pairs of electro-motors 20.
Motor control part 6 is examples of " control part " of the present invention.Electro-motor 20 is examples of " control object " of the present invention.
Thermally dependent resistor 5 is arranged near electro-motor 20.Temperature estimation section 8, based on the observed reading (temperature) of thermally dependent resistor 5, estimates the temperature of electro-motor 20.Thermally dependent resistor 5 is examples of " Temperature measuring section " of the present invention.Electro-motor 20 is examples of " Temperature estimate object " of the present invention.
Threshold value storage part 9 is made up of non-volatile memory device.The overheating protection temperature threshold in order to detect this super heat from overheated middle protection electro-motor 20 is stored in threshold value storage part 9.Threshold value write section 15 using threshold value time normal or abnormal time threshold value be written to threshold value storage part 9 as overheating protection temperature threshold, described abnormal time threshold value when being more normal than this threshold value be more strictly detected the threshold value of Warm status.
Export-restriction portion 7 is based on the estimation temperature to temperature estimation section 8 and the result that compares of overheating protection temperature threshold that stores in threshold value storage part 9, and restriction is used for the current instruction value that motor control part 6 pairs of electro-motors 20 control.Electro-motor 20 or overheating protection object.
Electric power is supplied from battery 30 pairs of power supply self-insurance portions 2 by the path different from IG switch 18.After IG switch 18 disconnects, the power supply of the 2 pairs of power controls 100 in power supply self-insurance portion carries out self-insurance.IG switch 18 is examples of " source switch " of the present invention.
After IG switch 18 disconnects by power supply self-insurance portion 2 just during self-insurance power supply, by thermally dependent resistor 5 and temperature estimation section 8, continue the Temperature estimate process of electro-motor 20.
Undertaken by motor control part 6, export-restriction portion 7, motor driving part 3, current detecting part 4 and electro-motor 20, for generation of the auxiliary control treatment of steering auxiliary force, carried out when IG switch 18 is connected, do not carried out when IG switch 18 disconnects.
The observed reading of self-insurance time setting part 10 based on thermally dependent resistor 5 and the estimation temperature of temperature estimation section 8, after IG switch 18 disconnects, set the self-insurance time by power supply self-insurance portion 2 self-insurance power supply.
Normal termination storage part 11 is made up of non-volatile memory device.In normal termination storage part 11, be provided with the region of normal termination mark 11a.The order of normal termination, as following, by being opened by normal termination mark 11a, thus is written to normal termination storage part 11 by normal termination write section 12.
Condition criterion portion 13 as described as follows, determines whether to meet the defined terms set based on the observed reading of thermally dependent resistor 5 and the estimation temperature of temperature estimation section 8.When condition criterion portion 13 is judged to meet defined terms, normal termination mark 11a opens by normal termination write section 12, and power supply self-insurance portion 2 stops the self-insurance of power supply.
Normal termination confirmation unit 14 is when IG switch 18 is connected, and confirm the order whether storing normal termination in normal termination storage part 11, namely whether normal termination mark 11a opens.
When normal termination confirmation unit 14 confirms the order storing normal termination in normal termination storage part 11, threshold value time normal is override threshold value storage part 9 by threshold value write section 15.In addition, when normal termination confirmation unit 14 confirms the order not storing normal termination in normal termination storage part 11, threshold value during exception is override threshold value storage part 9 by threshold value write section 15.
Threshold value confirmation unit 16 confirms the overheating protection temperature threshold stored in threshold value storage part 9.Time measurement portion 17 is measured following specific time.
Then, the action of electronic control package 100 is described with reference to Fig. 2 A ~ Fig. 6.
Fig. 2 A and Fig. 2 B is the diagram of circuit of the action representing electronic control package 100.Fig. 3 is the diagram of circuit of the details of the auxiliary control treatment of the step S15 representing Fig. 2 A.Fig. 4 is the diagram of circuit of the details of the self-insurance time setting process of the step S18 representing Fig. 2 B.Time diagram when Fig. 5 is electronic control package 100 normal.Time diagram when Fig. 6 is the exception of electronic control package 100.
By the microcomputer of Fig. 1, each several part is controlled, thus perform each process of Fig. 2 A ~ Fig. 4.
First, if IG switch 18 is switched on (the step S1 of Fig. 2 A, the T1 of Fig. 5 and Fig. 6), then carry out the initial treatment (the step S2 of Fig. 2 A) of each several part of electronic control package 100.The replacement (reset) (with reference to Fig. 5 and Fig. 6) of the power supply via IG switch 18 is comprised in this initial treatment.If the initial treatment of each several part completes, then the self-insurance (the step S3 of Fig. 2 A, the T2 of Fig. 5 and Fig. 6) of (beginning) power supply is opened in power supply self-insurance portion 2.
Then, normal termination confirmation unit 14, with reference to normal termination storage part 11, confirms whether normal termination mark 11a is open (the step S4 of Fig. 2 A).At this, if normal termination mark 11a is for opening (the step S4 of Fig. 2 A: "Yes"), then threshold value time normal is written to threshold value storage part 9 (the step S5 of Fig. 2 A) as overheating protection temperature threshold by threshold value write section 15.
Then, the normal termination mark 11a of normal termination storage part 11 is rewritten as closedown (the step S8 of Fig. 2 A, the T3 of Fig. 5 and Fig. 6) by normal termination write section 12.Then, temperature estimation section 8, based on the observed reading of thermally dependent resistor 5, estimates the temperature (the Temperature estimate process of the step S9 of Fig. 2 A, the T4 of Fig. 5 and Fig. 6) of electro-motor 20.Now, Temperature estimate initial value is set to and adds the value after specified value to the observed reading of thermally dependent resistor 5.
Then, if threshold value has been written to threshold value storage part 9 (the step S10 of Fig. 2 A: "Yes") as overheating protection temperature threshold when threshold value confirmation unit 16 confirms normal, then this state (T5 of Fig. 5 and Fig. 6) has been kept.
Then, if IG switch 18 is still switched on (the step S14 of Fig. 2 A: "No"), then auxiliary control treatment (step S15) is carried out by motor control part 6 etc.
Specifically, as shown in Figure 3, if to steering moment of torsion and the speed of a motor vehicle (step S31: "Yes") of microcomputer 1 input redirect, then motor control part 6 sets the current instruction value (step S32) of electro-motor 20 based on steering moment of torsion and the speed of a motor vehicle.Then; the overheating protection temperature threshold (being now threshold value time normal) that estimation temperature estimated by 7 pairs, export-restriction portion temperature estimation section 8 and threshold value storage part 9 store compares (step S33), limits (step S34) based on the current instruction value of this comparative result to electro-motor 20.Such as, at this, based on the difference estimating temperature and overheating protection temperature threshold, reduce the current instruction value of electro-motor 20.
Then, motor driving part 3 drives electro-motor 20 (step S35) based on limited current instruction value.Thus, give steering auxiliary force to the steering control system of automobile, becoming chaufeur can operate turning to less power.In addition, the temperature of the reality of electro-motor 20 and the observed reading of estimation temperature and thermally dependent resistor 5 rise.
When not inputting steering moment of torsion to microcomputer 1 (step S31: "No"), do not perform the process of step S32 ~ S35, and terminate auxiliary control treatment.
If auxiliary control treatment terminates, then again perform the process that the step S9 of Fig. 2 A is later.
Thereafter, if IG switch 18 is disconnected (the step S14 of Fig. 2 A: the T6 of "Yes", Fig. 5), then the measurement (the step S16 of Fig. 2 B) of time measurement portion 17 time opening.
Now, as shown in after the T6 of Fig. 5, become and do not supply electric power via IG switch 18 pairs of microcomputers 1, but owing to passing through power supply self-insurance portion 2 just at self-insurance power supply, therefore, supply the electric power of battery 30 from 2 pairs, power supply self-insurance portion microcomputer 1.In addition, the driving of electro-motor 20 is stopped, and the temperature of the reality of electro-motor 20 and the observed reading of estimation temperature and thermally dependent resistor 5 reduce.
Then, be confirmed whether in self-insurance time setting part 10, set the self-insurance time (the step S17 of Fig. 2 B) by power supply self-insurance portion 2 self-insurance power supply.Now, if the self-insurance time is not set (step S17: "No"), then the observed reading of self-insurance time setting part 10 based on thermally dependent resistor 5 and the estimation temperature of temperature estimation section 8, sets the self-insurance time (step S18).
Specifically, as described in Figure 4, first, by deducting the estimation temperature of temperature estimation section 8 from the observed reading of thermally dependent resistor 5, the poor Δ T (step S41) of both calculating.Then, differ from the function f of Δ T and regulation based on this, calculate the self-insurance time (step S42).
Thereafter, advance to the step S19 of Fig. 2 B, condition criterion portion 13, with reference to self-insurance time setting part 10 and time measurement portion 17, judges disconnect at IG switch 18 and whether have passed through the self-insurance time under the power supply self-insurance portion 2 self-insurance state of power supply.Now, if without self-insurance time (step S19: "No"), then again perform the process that the step S9 of Fig. 2 A is later.
In the step S19 of Fig. 2 B, if have passed through the self-insurance time (step S19: "Yes"), the then measurement (step S20) of standing time, to be rewritten as normal termination mark 11a by normal termination write section 12 and to open (T7 of step S21, Fig. 5).Then, the self-insurance (the step S22 of Fig. 2 B, the T8 of Fig. 5) of the power supply that (stopping) power supply self-insurance portion 2 carries out is closed.
On the other hand, when performing circulation (loop) of step S9 ~ S15 of Fig. 2 A, there occurs such as battery 30 be disassembled or exception from the power lead broken string etc. of battery 30 when, electronic control package 100 shuts down (shut down).Therefore, as shown in the T10 of Fig. 6, the power supply via IG switch 18 is disconnected, and the self-insurance of the power supply that power supply self-insurance portion 2 carries out also is closed (stopping).In addition, a series of process of Fig. 2 A and Fig. 2 B is interrupted, and the temperature survey based on thermally dependent resistor 5 is stopped, and is also stopped based on temperature estimation section 8 Temperature estimate.
Thereafter, if power up and electronic control package 100 restarts, then, after confirming IG switch 18 and being switched on (the step S1 of Fig. 2 A), the initial treatment (the step S2 of Fig. 2 A, the T11 of Fig. 6) of each several part is carried out.
If the initial treatment of each several part completes, then the self-insurance of power supply is opened (the step S3 of Fig. 2 A, the T12 of Fig. 6) by power supply self-insurance portion 2, and normal termination confirmation unit 14 confirms the state (the step S4 of Fig. 2 A) of normal termination mark 11a.Now, normal termination mark 11a remains the state (step S4: "No") becoming closedown in the step S8 before restarting.Therefore; threshold value during exception is override threshold value storage part 9 (the step S6 of Fig. 2 A, the T13 of Fig. 6) as overheating protection temperature threshold by threshold value write section 15, is started the measurement (the step S7 of Fig. 2 A) of threshold value recovery time by time measurement portion 17.
Then, normal termination mark 11a is still set to closedown (the step S8 of Fig. 2 A) by normal termination write section 12, and temperature estimation section 8 estimates the temperature (the step S9 of Fig. 2 A, the T14 of Fig. 6) of electro-motor 20.
After this, the situation (the step S10 of Fig. 2 A: "No") that when threshold value confirmation unit 16 confirms exception, threshold value is stored in threshold value storage part 9 as overheating protection temperature threshold.Then, if before threshold value recovery time (step S11: "No"), and IG switch 18 is still connected (step S14: "No"), then carry out auxiliary control treatment (step S15).
Now; as described above; carry out each process of Fig. 3, but in step S33, export-restriction portion 7 compares to the estimation temperature based on temperature estimation section 8 and the overheating protection temperature threshold (now for abnormal time threshold value) that stores in threshold value storage part 9.Then, based on the current instruction value (step S34) of this comparative result restriction electro-motor 20.Thus, compare above-mentioned normal time, carry out limiting the current instruction value of electro-motor 20 reduced, suppress the temperature of electro-motor 20 to rise.
Thereafter; if through threshold value recovery time (the step S11 of Fig. 2 A: the T15 of "Yes", Fig. 6); the then measurement (the step S12 of Fig. 2 A) of time measurement portion 17 outage threshold recovery time, threshold value time normal is override threshold value storage part 9 (step S13) as overheating protection temperature threshold by threshold value write section.
Then, if IG switch 18 is disconnected (step S14: "Yes"), then as described above, the process that the step S16 of Fig. 2 B is later is performed.
In the above-described embodiment, when there occurs abnormal, the electronic control package 100 of electric motor driven power steering system 200 shuts down, and becomes the self-insurance not carrying out power supply by power supply self-insurance portion 2, and the Temperature estimate process based on temperature estimation section 8 is interrupted.But; when IG switch 18 is thereafter connected; in normal termination storage part 11, do not store the order (normal termination mark 11a is closed condition) of normal termination, therefore, threshold value during exception is written to threshold value storage part 9 as overheating protection temperature threshold by threshold value write section 15.Therefore, based on the result compared with threshold value time abnormal the estimation temperature of temperature estimation section 8, the control strictly limited for controlling the electro-motor 20 that steering is assisted by export-restriction portion 7 is exported, therefore, it is possible to prevent electro-motor 20 due to overheated et out of order.
In addition, in the above-described embodiment, if from threshold value recovery time threshold value during exception be written to through regulation threshold value storage part 9, then threshold value time normal is override threshold value storage part 9 by threshold value write section 15.Therefore, threshold value time normal, close to after Temperature estimate value, can reset as overheating protection temperature threshold threshold value storage part 9 by the temperature of the reality of electro-motor 20.Then, based on to the estimation temperature of temperature estimation section 8 and normal time the threshold value result that compares, control electro-motor 20, thus the performance of electro-motor 20 can not be lost, play performance fully.
And then in the above-described embodiment, self-insurance time setting part 10, based on the difference of the observed reading of thermally dependent resistor 5 and the estimation temperature of temperature estimation section 8, sets the self-insurance time by power supply self-insurance portion 2 self-insurance power supply.Then, if condition criterion portion 13 is judged to disconnect and under the power supply self-insurance portion 2 self-insurance state of power supply at IG switch 18, have passed through the self-insurance time, then normal termination mark 11a opens (state being written with the order of normal termination) by normal termination write section 12, and power supply self-insurance portion 2 stopped the self-insurance of power supply.
Thus, through the self-insurance time, the temperature of the reality of electro-motor 20 reduces, and this temperature, close to after the estimation temperature of temperature estimation section 8, stops self-insurance and the Temperature estimate of power supply, the order of normal termination can be recorded to normal termination storage part 11.In addition, before the self-insurance time, due to the generation of exception, when having interrupted self-insurance and the Temperature estimate of power supply, can be set to and the order of normal termination is not recorded to normal termination storage part 11 (closed condition of normal termination mark 11a).Then, when the IG switch 18 of next time is connected, threshold value when threshold value time normal or exception suitably can be set as overheating protection temperature threshold threshold value storage part 9.
The present invention also can adopt various embodiment other than the above.Such as, in the above embodiment, to disconnect and through the self-insurance time under the power supply self-insurance portion 2 self-insurance state of power supply, then by the example that normal termination mark 11a opens, but the present invention is not limited thereto if show at IG switch 18.In addition, also can be set to such as below like that.After IG switch 18 disconnects (the step S14 of Fig. 2 A: "Yes"), condition criterion portion 13 as shown in Figure 7, calculates difference (heal differential) Δ T (step S23) of the observed reading of thermally dependent resistor 5 and the estimation temperature of temperature estimation section 8.Then, if this difference Δ T is less than specified value (step S24: "Yes"), then normal termination mark 11a is opened (step S21), stop the self-insurance (step S22) based on the power supply in power supply self-insurance portion 2.If difference Δ T is more than specified value (step S24: "No"), be then back to step S9.
Thus, the temperature of the reality of electro-motor 20 reduces, and this temperature, close to after the estimation temperature of temperature estimation section 8, stops self-insurance and the Temperature estimate of power supply, the order of normal termination can be recorded to normal termination storage part 11.In addition, during the difference Δ T of the observed reading of thermally dependent resistor 5 and the estimation temperature of temperature estimation section 8 is positioned at more than specified value, due to the generation of exception, when having interrupted self-insurance and the Temperature estimate of power supply, can be set to and the order of normal termination is not recorded to normal termination storage part 11 (closed condition of normal termination mark 11a).Then, when the IG switch 18 of next time is connected, threshold value when threshold value time normal or exception suitably can be set as overheating protection temperature threshold threshold value storage part 9.
In addition, in the above embodiment, if show after threshold value during exception is written to threshold value storage part 9 by threshold value write section 15; through threshold value recovery time; then threshold value time normal is override threshold value storage part 9, change the example of overheating protection temperature threshold, but the present invention is not limited to this.In addition; also can be such as; after threshold value during exception is written to threshold value storage part 9; the estimation temperature of temperature estimation section 8 drops to the difference being less than the estimation temperature of specified value or temperature estimation section 8 and the observed reading of thermally dependent resistor 5 and becomes when being less than specified value; threshold value time normal is override threshold value storage part 9, changes overheating protection temperature threshold.
In addition, in the above embodiment, show the example using thermally dependent resistor 5 as Temperature measuring section, but the present invention is not limited to this.In addition, also can be such as use detector unit beyond based on the measurement component of the current value measuring tempeature of electro-motor 20 or thermally dependent resistor 5 etc. as Temperature measuring section.
In addition, in the above embodiment, show control object, Temperature estimate object and overheating protection to the example liking electro-motor 20, but the present invention is not limited to this, also can be beyond electro-motor 20.In addition, control object, Temperature estimate object and overheating protection object also can be different separately, also can any 2 identical.Such as, Temperature estimate object and overheating protection object also can be the exothermic bodys of the relay (relay), electrolytic condenser etc. comprised in motor driving part 3, also can be the electrical motor, electric actuator etc. that separate with electronic control package.In addition, control object also can be the electrical motor, electric actuator etc. that separate with electronic control package.
And then, in the above embodiment, enumerate and example of the present invention has been applied to the electronic control system 100 of the electric motor driven power steering system 200 of automobile, but be not limited thereto, in addition, to the electronic control package of vehicle use, household electrical appliances use or OA (office automation) use etc., also the present invention can be applied.
Claims (5)
1. an electronic control package, is characterized in that,
Described electronic control package possesses:
Control part, based on the input information of regulation, controls control object;
Temperature measuring section, is arranged near Temperature estimate object;
Temperature estimation section, based on the observed reading of described Temperature measuring section, estimates the temperature of Temperature estimate object;
Threshold value storage part, stores overheating protection temperature threshold;
Export-restriction portion, based on the result that the estimation temperature to described temperature estimation section and the described overheating protection temperature threshold that stores in described threshold value storage part compare, restriction is used for described control part and exports the control that described control object controls;
Power supply self-insurance portion, self-insurance power supply after source switch disconnects;
Normal termination storage part, stores the order of normal termination;
Normal termination write section, is written to described normal termination storage part by the order of normal termination;
Condition criterion portion, determines whether to meet the defined terms set based on the observed reading of described Temperature measuring section and the estimation temperature of described temperature estimation section;
Normal termination confirmation unit, confirms the order whether storing normal termination in described normal termination storage part; And
Threshold value write section, using threshold value time normal or abnormal time threshold value be written to described threshold value storage part as described overheating protection temperature threshold, described abnormal time threshold value when being more normal than this threshold value be more strictly detected the threshold value of Warm status,
After described source switch disconnects, when described condition criterion portion is judged to meet described defined terms, the order of normal termination is written to described normal termination storage part by described normal termination write section, and described power supply self-insurance portion stops the self-insurance of described power supply
When described source switch is connected, when described normal termination confirmation unit confirms to store the order of normal termination in described normal termination storage part, described threshold value write section by described normal time threshold value override described threshold value storage part, when described normal termination confirmation unit confirms not store the order of normal termination in described normal termination storage part, described threshold value write section by described abnormal time threshold value override described threshold value storage part.
2. electronic control package as claimed in claim 1, is characterized in that,
If from by described abnormal time threshold value override through specified time described threshold value storage part, then described threshold value write section by described normal time threshold value override described threshold value storage part.
3. electronic control package as claimed in claim 1 or 2, is characterized in that,
Described electronic control package also possesses: self-insurance time setting part, based on the difference of the observed reading of described Temperature measuring section and the estimation temperature of described temperature estimation section, sets the self-insurance time of described power supply self-insurance portion's self-insurance power supply,
Described condition criterion portion judges to disconnect at described source switch and whether have passed through the described self-insurance time, as described defined terms under described power supply self-insurance portion's self-insurance state of power supply.
4. electronic control package as claimed in claim 1 or 2, is characterized in that,
Described condition criterion portion judges whether the difference of the observed reading of described Temperature measuring section and the estimation temperature of described temperature estimation section has become and is less than specified value, as described defined terms.
5. the electronic control package as described in any one of Claims 1-4, is characterized in that,
Described electronic control package is made up of the electric power-steering controller carried on vehicle,
Described control object and described Temperature estimate object are made up of electro-motor, and described electro-motor controls it by described electric power-steering controller and drives, to produce steering auxiliary force,
Described source switch is made up of the ignition lock of vehicle.
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| JP2013155893A JP6066201B2 (en) | 2013-07-26 | 2013-07-26 | Electronic control unit |
| JP2013-155893 | 2013-07-26 |
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| CN113273077A (en) * | 2019-01-16 | 2021-08-17 | 三菱电机株式会社 | Motor control device and air conditioning device |
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| CA3035307C (en) | 2016-09-02 | 2024-04-02 | Kongsberg Inc. | Techniques for limiting electrical current provided to a motor in an electric power steering system |
| JP6683116B2 (en) * | 2016-12-12 | 2020-04-15 | 株式会社デンソー | Motor control device |
| JP2023060590A (en) * | 2021-10-18 | 2023-04-28 | 株式会社デンソー | Driving member controller |
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| JP5332689B2 (en) * | 2009-02-13 | 2013-11-06 | 日本精工株式会社 | Motor control device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6066201B2 (en) | 2017-01-25 |
| CN104340265B (en) | 2017-01-18 |
| JP2015024754A (en) | 2015-02-05 |
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