CN103675657B - Switch element failure detector and detection method - Google Patents
Switch element failure detector and detection method Download PDFInfo
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- CN103675657B CN103675657B CN201310211739.2A CN201310211739A CN103675657B CN 103675657 B CN103675657 B CN 103675657B CN 201310211739 A CN201310211739 A CN 201310211739A CN 103675657 B CN103675657 B CN 103675657B
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- switch element
- resistive element
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2621—Circuits therefor for testing field effect transistors, i.e. FET's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Abstract
The present invention relates to a kind of ON/OFF time according to each switch element different, change the dutycycle (Duty) of pulse-width signal, measure electric pressure difference according to resistance value, detect switch element failure detector and the detection method of switch element fault.The present invention is according to preferred embodiment, and switch element failure detector is that 3 phase motor driving parts of the intelligently voltage boosting machine used when vehicle brake is braked can detect most switch element faults.Comprising: switching controlling part, opening (ON) and closing (OFF) with each switch element of dutycycle (Duty) different control；Resistive element portion, the resistive element composition that each is connected with described switch element；Voltage determination portion, measures the magnitude of voltage at the described 3 interconnective cores of phase motor；And failure detecting section, whether the voltage determined in utilizing described voltage determination portion is to detect described switch element fault.
Description
Technical field
The present invention relates to fault detect and the detection method of switch element.More particularly to respectively
Dutycycle (DUTY) change of the open and close time pulse-width signal of switch element, according to resistance
The grade difference of pH-value determination pH voltage levvl, the switch element failure detector of detection switch element fault
And method invention.
Background technology
The brakes of standard vehicle is that the resistance using driver to produce after stepping on foot brake comes car
The principle being braked.
Recently, in brakes, use based on motor booster is loaded with intelligently voltage boosting machine, at car
When braking again, the active brakes assisting braking can be played.
Intelligently voltage boosting brake system motor drives in the case of carrying out electrodynamic, the reliability of motor
Action it is critical that.But, because of the control of micro-control unit (MCU, Micro Control Unit)
Make bad, manufacture consumption electric current bad, high cause heating time delay, because of rotate time accumulation load cause
Quasiconductor output is bad waits multiple reasons that the fault (Short) of motor coil can be caused to occur.Motor lines
Circle fault generation the big electric current in brakes loop can be caused to flow, cause switch element fault or
The problems such as the scaling loss of electronic-controlled installation (ECU, Electronic Control Unit) occur.
Even if such problem can be produced, now for the field effect transistor of intelligently voltage boosting brake system
The fault detection method of the switch element fault that pipe (FET, Field Effect Transistor) is identical
Occur not yet.
Therefore, identical with field-effect transistor in intelligently voltage boosting brake system switch element fault
Detection scheme is needs.
Summary of the invention
(solving the technical problem that)
The problem that the invention solves the problems that its object is to provide failed equipment and the inspection of detection switch element
Survey method, can answer in equity measure in fault detect, fault notification, failure safe (Fail Safe),
Most switch units of the motor-drive circuit of intelligently voltage boosting machine are used in detection vehicle brake braking procedure
Part fault.
(solving the means of problem)
For reaching described problem, 3 phase electricity of the intelligently voltage boosting machine used in vehicle brake braking procedure
To most switch element failure detectors in machine braking parts, comprising: switching controlling part, to account for
The empty described switch element of control more different than (Duty) each open (On) and close (Off)；Resistive element
Portion, the resistive element being connected with switch element each described forms；Voltage determination portion, at 3 phase electricity
The core that machine interconnects measures magnitude of voltage；And failure detecting section, utilize described voltage determination
The voltage detection switch element determined in portion whether fault.
It may be preferred that described switch element is field-effect transistor, described resistive element can be with field effect
The source electrode (Source) of transistor is held or (Drain) end that drains is connected.
It may be preferred that described switching electronics is by upper end switch element and lower switch element two parts
Distinguishing, described switching controlling part described upper end switch element or described lower end in described specific interval are opened
Close in element any one for opening, or described upper end switch element and described lower switch element complete
For closing, there is the invalid interval that electric current is not applied in portion, the most described dutycycle can in the most described motor
Become.
During it may be preferred that the described fault detect stage is described 3 phase motor driving part regular event,
The voltage range determined in described voltage determination portion is presetting, the electricity measured in described voltage determination portion
When pressure is not described presetting voltage range situation, described switch element can be detected as being out of order.
For reaching described purpose, switch element fault detection method uses in vehicle brake braking procedure
Intelligently voltage boosting machine 3 phase motor braking portions in most switch element fault detection methods, its bag
Including: the on-off control stage, with the described switch element of dutycycle (Duty) different control, each opens (On)
Or close (Off)；In the voltage determination stage, the central part interconnected at described 3 phase motors measures electricity
Pressure value；In the fault detect stage, utilize switch element described in the voltage detecting that described voltage determination determines
Fault whether.
It may be preferred that the resistive element that described switch element can connect with each.
It may be preferred that described switch element is field-effect transistor (FET, Field Effect
Transistor), described resistive element is the source electrode (Source) that can be connected to field-effect transistor
End or drain electrode (Drain) end.
It may be preferred that described switching electronics is by upper end switch element and lower switch element two
Subregion divides, the described on-off control stage in described specific interval described upper end switch element or described under
In end switch element, any one is for opening (On), or described upper end switch element and described lower end are opened
Close all passes of element (Off), in the most described motor, there is the invalid interval that electric current is not applied in,
The most described variable duty ratio.
During it may be preferred that the described fault detect stage is described 3 phase motor driving part abnormal operation,
The voltage range determined within the described voltage determination stage is presetting, measures in described voltage determination portion
Voltage when being described presetting voltage range situation, described switch element can be to be out of order.
It may be preferred that described presetting voltage range is according to each electricity connected of described switch element
The change of resistance element value sets.
(effect of invention)
The present invention can detect the switch element fault of the motor-drive circuit of intelligently voltage boosting machine.
The particularly present invention is capable of detecting when at 3 phase motor driving parts of intelligently voltage boosting brake system to occur
The fault of field-effect transistor.
Additionally, the fault detect that the present invention is by switch element, can be in advance to applying power supply on motor
The electronic-controlled installation of constraint is protected, and driver carries out the fault of prompt switch element, logical
Cross the generation that error protection accomplishes to prevent traffic accident.
Accompanying drawing explanation
Fig. 1 is the present invention switch element failure detector figure according to embodiment.
Fig. 2 a is that the switching controlling part position of switch element fault detection device is switched by the present invention
Pulse-width signal the 1st exemplary plot that element controls.
Fig. 2 b is that the switching controlling part position of switch element fault detection device is switched by the present invention
Pulse-width signal the 2nd exemplary plot that element controls.
Fig. 2 c is that the switching controlling part position of switch element fault detection device is switched by the present invention
Pulse-width signal the 3rd exemplary plot that element controls.
Fig. 2 d is that the switching controlling part position of switch element fault detection device is switched by the present invention
Pulse-width signal the 4th exemplary plot that element controls.
Fig. 3 a is switching controlling part position and Fig. 2 a that switch element fault is detected device by the present invention
When same pulse width modulated signal appliesWithBetween produce electric current flow graph.
Fig. 3 b is switching controlling part position and Fig. 2 a that switch element fault is detected device by the present invention
When same pulse width modulated signal appliesWithBetween produce electric current flow graph.
Fig. 3 c is switching controlling part position and Fig. 2 b that switch element fault is detected device by the present invention
When same pulse width modulated signal appliesWithBetween produce electric current flow graph
Fig. 3 d is switching controlling part position and Fig. 2 c that switch element fault is detected device by the present invention
When same pulse width modulated signal appliesWithBetween produce electric current flow graph
Fig. 3 e is switching controlling part position and Fig. 2 c that switch element fault is detected device by the present invention
When same pulse width modulated signal appliesWithBetween produce electric current flow graph.
Fig. 3 f is switching controlling part position and Fig. 2 d that switch element fault is detected device by the present invention
When same pulse width modulated signal appliesWithBetween produce electric current flow graph.
Fig. 3 g is that switch element fault is detected the switching controlling part position of device with Fig. 2 a extremely by the present invention
When Fig. 2 d same pulse width modulated signal appliesBetween produce electric current flow graph.
Fig. 4 a-4f is the failure detecting section detection switch element of switch element failure detector of the present invention
The Working Examples figure of fault.
Fig. 5 is the switch element detection method dependence diagram that the present invention is done according to preferred embodiment.
(sign flag explanation)
110: switching controlling part 120: resistive element portion
130: voltage determination portion 140: failure detecting section
150: switch element 152: upper end switch element
154: lower switch element 160:3 phase motor
Detailed description of the invention
By referring to accompanying drawing and embodiment described below, content below illustrates and the most inner same
The respective corresponding symbol of one element will omit the description.Additionally the present invention carries in description
And known function and consisting of the most verbose be not described in further detail.
When mentioning that certain element " connection " or " continuing " situation occurs with another kind of element
Time, although can be directly connected to by its element or continue, but need clear and definite also have other structures in the middle of it
Key element is become to there is a possibility that.On the contrary, also it should be understood that work as and mention that certain element is constituted with another kind of
When " connection " or " continuing " situation occurs in key element, in the middle of it, also there are other elements non-existent
Probability.
The singulative mentioned in the description, in the case of being not particularly limited, then includes plural number
Form." the including (comprises) " or " (comprising) that include " used in description
Be not excluded for for, mentioning element, step, action and/or be beyond element, existing or add it
Other elements more than one, step, action in addition and/or be element.
When switch element failure detector according to the present invention is the normal operating of intelligently voltage boosting machine, inspection
Measured motor driving switch element fault, strengthens failure safe (Fail Safe) thus improves the intelligence of vehicle
Can booster security of system.Switch element has field-effect transistor (FET, Field Effect
Transistor) etc..
It is applicable in the intelligently voltage boosting machine system of vehicle according to switch element failure detector of the present invention
Face brushless AC motor (Brushless AC Motor) or 3 phase motor driving parts.As follows accompanying drawing one
Rise and according to the preferred embodiment switch element fault detection device is illustrated.
Fig. 1 is switch element failure detector drawing according to an embodiment of the invention.
With reference to Fig. 1, switch element failure detector comprises switching controlling part 110, resistive element portion
120, voltage determination portion 130 and failure detecting section 140.
3 phase motor 160 drive circuits of intelligently voltage boosting machine have 6 switch elements 150, general intelligence
3 phase motor 160 drive circuits of energy booster have 6 switch elements 150, but are not absolute numbers.
Switch element 150 uses FET to realize.In order to help to understand that the present invention will be to real by 6 FET
The switch element detection device of 3 existing phase motor 160 drive circuits illustrates.
6 switch elements 150 are S1, S2, S3, S4, S5 and S6 respectively, as Fig. 1 connects.
S1, S2 and S3 are upper end switch element 152, and S4, S5 and S6 are lower switch element 154.Under
End switch element 154 is circular.
The present invention is to be to drive with the 3 phase motors 160 being set according to switch element failure detector
The dynamic portion normal voltage table when regular event is compared with the voltage detected in voltage determination portion 130
Relatively, and whether carry out judging the detection of switch element 150.Therefore, to switch element fault of the present invention
First the regular event explanation of 3 phase motors 160 is carried out on the premise of detection device explanation.
In the case of regular event, 6 switch elements 150 of switching controlling part 110 control respective action,
Both, switching controlling part 110 utilized pulse-width signal opening (On) or closing (Off) switch element 150
It is controlled.
Preferably, switching controlling part 110 is different to each switch element with signal dutyfactor (Duty)
In 150 control specific interval upper end switch elements 152 or lower switch element 154, any one is
Open state or upper end switch element 152 and all closedowns of lower switch element 154, then 3 phases electricity
Machine 160 is inner exists the invalid interval that electric current is not applied in.Fig. 2 a is at switch element according to the present invention
In the switching controlling part of failure detector, for controlling the legend of the pulse-width signal of switch element.
Fig. 2 b be the present invention in the switching controlling part of switch element failure detector, for control switch unit
Another exemplary plot of the pulse-width signal of part.Fig. 2 c is that the present invention is at switch element failure detector
Switching controlling part in, for control switch element the another exemplary plot of pulse-width signal.
Fig. 3 a is that switch element fault is detected switching controlling part position and Fig. 2 a phase of device by the present invention
When applying with pulse-width signalWithBetween produce electric current flow graph.Fig. 3 b is the present invention couple
The switching controlling part position of switch element failure detector applies with Fig. 2 a same pulse width modulated signal
TimeWithBetween produce electric current flow graph.Fig. 3 c is that the present invention is to switch element fault detection dress
When the switching controlling part position put applies with Fig. 2 b same pulse width modulated signalWithBetween produce
Electric current flow graph.Fig. 3 d is the present invention switching controlling part position to switch element fault detection device
When applying with Fig. 2 c same pulse width modulated signalWithBetween produce electric current flow graph.Fig. 3 e is
Switch element fault is detected switching controlling part position and Fig. 2 c same pulse width modulated of device by the present invention
When signal appliesWithBetween produce electric current flow graph.Fig. 3 f is that the present invention is to switch element event
When the switching controlling part position of barrier detection device applies with Fig. 2 d same pulse width modulated signalWithIt
Between produce electric current flow graph.Fig. 3 g is the present invention switch control to switch element fault detection device
When position, portion processed applies with Fig. 2 a, Fig. 2 b or Fig. 2 c same pulse width modulated signal
Between produce electric current flow graph.
It is different that switch element control portion 110 controls each switch element signal dutyfactor, in specific interval
Example Fig. 2 a～2d and 3a～3g that can there is invalid interval comes with reference to explanation.
Fig. 2 a～Fig. 2 d is the signal diagram that S1～S3 applies, and the pulse-width signal that S4～S6 applies is
The anti-phase of each signal that S1～S3 applies.That is, the signal that S1 applies is to make switch element 150
S1 opens, and the signal that S4 applies is to make switch element 150 S4 open.S2 and S5 matches
Anti-phase, after S3～S6 coupling, the signal of mutual anti-phase is applied in.
The signal width of signal such as Fig. 2 a to Fig. 2 d that switching controlling part 110 applies, the widest axle or time
Axle.I.e. observing each signal of Fig. 2 a to Fig. 2 d, the dutycycle that S1, S2 and S3 apply is different.
Dutycycle is different, in specific interval in upper end switch element 152 or lower switch element 154
Any one is open state or upper end switch element 152 and all closedowns of lower switch element 154,
So 3 phase motors 160 are inner exists the invalid interval that electric current is not applied in.
Specifically, at switching controlling part 110 signal identical with Fig. 2 a at switch element 150 S1, S2
And S3 applies, the inverse phase signal of Fig. 2 a is as applied in switch element 150 S4, S5 and S6
Talk aboutWithIn interval, switch element 150 S3, S4 and S5 are for opening, switch element 150 S1,
S2 and S6 is for closing.Now, generation electric current stream identical with Fig. 3 a during 3 phase motor 160 inner applying electric current
Dynamic.
At switching controlling part 110 signal identical with Fig. 2 a in switch element 150 S1, S2 and S3
Apply, the inverse phase signal of Fig. 2 a as in switch element 150 S4, S5 and S6 apply if
WithIn interval, switch element 150 S2, S3 and S4 are for opening, switch element 150 S1, S5 and S6
For closing.Now, current flow identical with Fig. 3 b during 3 phase motor 160 inner applying electric current.
At switching controlling part 110 signal identical with Fig. 2 b in switch element 150 S1, S2 and S3
Apply, the inverse phase signal of Fig. 2 b as in switch element 150 S4, S5 and S6 apply if
WithIn interval, switch element 150 S1, S4 and S5 are for opening, switch element 150 S2, S3 and S6
For closing.Now, current flow identical with Fig. 3 c during 3 phase motor 160 inner applying electric current.
At switching controlling part 110 signal identical with Fig. 2 c in switch element 150 S1, S2 and S3
Apply, the inverse phase signal of Fig. 2 c as in switch element 150 S4, S5 and S6 apply if
WithIn interval, switch element 150 S1, S2 and S6 are for opening, switch element 150 S3, S4 and S5
For closing.Now, current flow identical with Fig. 3 d during 3 phase motor 160 inner applying electric current.
At switching controlling part 110 signal identical with Fig. 2 c in switch element 150 S1, S2 and S3
Apply, the inverse phase signal of Fig. 2 c as in switch element 150 S4, S5 and S6 apply if
WithIn interval, switch element 150 S2, S4 and S6 are for opening, switch element 150 S1, S3 and S5
For closing.Now, current flow identical with Fig. 3 e during 3 phase motor 160 inner applying electric current.
At switching controlling part 110 signal identical with Fig. 2 d in switch element 150 S1, S2 and S3
Apply, the inverse phase signal of Fig. 2 c as in switch element 150 S4, S5 and S6 apply if
WithIn interval, switch element 150 S1, S3 and S5 are for opening, switch element 150 S2, S4 and S6
For closing.Now, current flow identical with Fig. 3 f during 3 phase motor 160 inner applying electric current.
The current trend occurred in Fig. 3 a～3f can see that current trend in 3 phase motors 160.
But, the situation of Fig. 3 g, Fig. 2 a～Fig. 2 c and its inverse phase signal in switching controlling part 110
When identical signal is applied by respective switch,WithIn interval, switch element 150 is all
Guan Bi,In interval, switch element 150 is all to be opened, and makes this 3 phase motor 160 electric current not
Flowing.That is, in Fig. 2 a～2cAndInterval is Dead space.
The signal that switching controlling part 110 applies is not limited to Fig. 2 a～2d, there is invalid interval duty
Can apply various signal than modulation, the electric current flowing of Fig. 3 a～3g is then according to the signal change applied.
According to the present invention, switch element failure detector can be by respective switch element 150
Resistive element is connected.When switch element 150 is field-effect transistor, resistive element such as Fig. 1 is connected.
That is, resistive element can be held with the field-effect transistor source, upper end (Source) of upper end switch element 152
Or drain electrode (Drain) end of the lower end field-effect transistor of lower switch element 154 is each connected.
With reference to if Fig. 1, the source electrode (Source) of S1, S2 and S3 is held and each R1, R2 and R3
Being connected, the drain electrode end of S4, S5 and S6 is connected with each R4, R5 and R6.S1～S6 is switch unit
Part 150, R1～R6 is the resistive element in resistive element portion 120.
Being connected, by resistive element, the resistive element portion 120 formed is at electricity as each field-effect transistor
The change of voltage can be identified under the state that the pressure inner fixed voltage of determination part 130 has been applied in.
That is, according to switch element failure detector of the present invention be as upper end switch element 152 and under
The respective resistive element of end switch element 154 is connected, according to illustrated Fig. 2's and Fig. 3 before
Electric pressure difference can be produced according to resistance value under 6 kinds of current forms, then can detect out according to difference
Close the fault of element 150.
If describing in detail with reference to Fig. 1,3 phase motor 160u, v and w are brilliant with the field effect of respective upper end
Body pipe and lower end field-effect transistor match existence, because of the upper end field-effect transistor after coupling and under
The resistance connected between end field-effect transistor, 6 kinds of current forms can produce according to resistance value when applying
Raw electric pressure difference.Failure detecting section 140 utilizes this electric pressure difference to can detect that 3 phase electricity
The fault of the field-effect transistor of machine 160.
Voltage detection department is identical with Fig. 1, and the central point of 3 phase motors 160 is preferably the mensuration of voltage.
Because the failure causes such as the open circuit of switch element 150 or short circuit cause 3 phase motors 160 that exception occurs
During action, the magnitude of voltage of voltage detection department is not inconsistent with the magnitude of voltage of regular event.
Therefore, failure detecting section 140 determines in voltage detection department 130 magnitude of voltage and presetting
Whether the voltage range of regular event state is compared relatively can draw the fault of switch element 150.Switch
There is the problem such as the open circuit of switch element 150 or the short circuit of switch element 150 in the fault of element 150.
When failure detecting section 140 detects out of order situation, failure detecting section 140 can interrupt 3 phase electricity
The action of machine 160, and open failure safe (Fail Safe) pattern.
Failsafe mode refer to use pressure amplification carry out mechanical brake mode of braking etc. use its
He carries out car braking pattern at brake system mode.
The default voltage range being set to regular event state can be along with the kind of switch element 150, switch
The performance of element 150, the size of resistance, the quantity of switch element 150, the size of input power,
The performance etc. of 3 phase motors 160 changes.
Or failure detecting section 140 can shift to an earlier date according to the magnitude of voltage determined at voltage detection department 130
Whether fault to be set.That is, failure detecting section 140 is according to the electricity determined at voltage detection department 130
The grade of pressure value judges whether switch element 150 breaks down, and what kind of can be set in advance
Grade breaker in middle element 150 can detect fault.
Each resistance value constituting resistive element portion 120 mutually can be different, therefore, and failure detecting section
140 can detect that concrete which switch element 150 breaks down.
Fig. 4 is the event of the failure detecting section detection switch element of switch element failure detector of the present invention
Barrier Working Examples figure.
With reference to Fig. 4, the fault illustration that failure detecting section 140 detects switch element 150 illustrates
If, Fig. 4 a to f S1, S5 and S6 the field-effect transistor of switch element 150 for opening (ON)
Time, and when in 6 field-effect transistors, one of them is for open circuit or short circuit, from voltage determination portion 130
The magnitude of voltage just determined is set.
Scheming with reference to Fig. 4 a, S1 is situation about breaking down.The measured value in voltage determination portion 130 is OV
Time, failure detecting section 140 may determine that S1 switch, for open circuit, can detect switch element 150
Fault or open circuit.Further, when the voltage determination portion measured value of failure detecting section 140 is 9.17V,
The short circuit of switch element 150 can be detected.
Scheme with reference to Fig. 4 b, if during situation that S2 is fault, the voltage determination of failure detecting section 140
Portion 130 value, for if D.C., at this moment can detect that switch element 150 is open circuit, if 13V,
At this moment can detect that switch element 150 is for short circuit.
Scheme with reference to Fig. 4 c, if during situation that S3 is fault, the voltage determination of failure detecting section 140
Portion 130 value, for if D.C., at this moment can detect that switch element 150 is open circuit, for 9.17V～13V
If, at this moment can detect that switch element 150 is for short circuit.
Scheme with reference to Fig. 4 d, if during situation that S4 is fault, the voltage determination of failure detecting section 140
Portion 130 value, for if D.C., at this moment can detect that switch element 150 is open circuit, if OV,
At this moment can detect that switch element 150 is for short circuit.
Scheme with reference to Fig. 4 e, if during situation that S5 is fault, the voltage determination of failure detecting section 140
Portion 130 value, for if OV～9.17V, at this moment can detect that switch element 150 is open circuit, for D.C.
If, at this moment can detect that switch element 150 is for short circuit.
Scheme with reference to Fig. 4 f, if during situation that S6 is fault, the voltage determination of failure detecting section 140
Portion 130 value, for if OV～9.17V, at this moment can detect that switch element 150 is open circuit, for D.C.
If, at this moment can detect that switch element 150 is for short circuit.
The magnitude of voltage numerical value enumerated in Fig. 4, can be along with these resistance units constituting resistive element portion
The resistance value of part carries out different settings, also can be along with switch element 150, the kind of 3 phase motor 160 grades
Class becomes different.In normal state, the voltage measured in voltage determination portion 130 is as well as resistance
Each resistive element resistance value in element portion 120 becomes different.
According to the present invention, the resistive element in switch element failure detector resistive element portion 120 is each
Resistance value the most different, it can be determined that the detection of particular switch element, when a switch element is out of order
If will also result in vehicle accident, because can also detect concrete in most switch elements 150
Which switch element goes wrong.
When failure detecting section 140 detects the fault of switch element 150, failure detecting section 140 will be sent out
Prompting driver is offered in responding, can remind whether intelligently voltage boosting machine occurs with sound or vibration mode
Whether fault or switch element 150 break down.
Fig. 5 be the present invention be according to preferable ground embodiment, about the flow process of switch element detection method
Figure.
It is according to preferable embodiment with reference to Fig. 5, if switch element testing method is illustrated,
Switching controlling part 110 dutycycle (Duty) is different to be opened (On) to each or closes (Off) control
System (S510 stage).
Resistive element portion allows the voltage determined produce grade difference and the resistance unit in switch element 150
Part is attached (S520 stage).Voltage determination portion 130 carries out voltage determination in 3 phase motor center
(S530 stage).
Failure detecting section 140 use measure voltage carry out detect switch element 150 fault, fault
Test section 140 when switch element 150 detects fault, startup separator safe mode (S550 stage)
And the fault of prompting driver's switch element 150 is alerted in modes such as sound, vibration, light.
Intelligently voltage boosting machine can be detected according to switch element of the present invention detection device and detection method
Switch element 150 fault of drive circuit, can detect intelligently voltage boosting mechanism especially in the present invention
Field-effect transistor (FET, the Field that 3 phase motors 160 of dynamic system produce in drive division
Effect Transistor) fault.
Further, switch element can be detected according to switch element of the present invention detection device and detection method
Fault, the power supply applied in limiting 3 phase motors in advance also protects electronic-controlled installation.About switch unit
The fault of part 150 is reported to driver can be by the automatic anti-therefore trouble-saving generation of device.
The present invention is in preferable ground embodiment, and the drawing of switch element failure detector should be managed
Solve principle of invention for this and illustrate viewpoint with concrete examples of implementation.It is similar to, all of flow chart
Available computer read-write medium has been implemented, and computer or processor illustrate expressly and whether say
Bright, it will be appreciated that for being performed various program by computer or processor.May be provided in that comprise can be with use
On the drawing of the functional device of reason device or similar representation of concept, the various element illustrated, this
The function of a little elements is possible not only on special hardware use, it is also possible to provide at suitable software or
On relevant software.There is provided processor time, can by the single application specific processor of described performance, single share
Processor or most processor respectively, or share a part therein.
And processor, control or the use that similarly concept term is correct when proposing should be to have
The hardware performing software capability need not illustrate to be cited as exclusiveness, unrestricted signal processor (DSP)
For storage hardware, software, need to understand hint includes read only memory (ROM), random access memory
And non-volatility memorizer (RAM).Also known other usual hardware can be comprised.
The technological thought being only used as the present invention of described above illustrates, the technical field of the invention knowledge
Personnel can carry out various correction, change in the range of without departing from the substitutive characteristics of the present invention
And displacement.Therefore, the present invention launches example and the drawing of reference are not to limit to describe in detail
Due to this, the technological thought scope according to above-described embodiment and with reference to the drawing present invention is not limited to this,
Protection scope of the present invention is understood by following claims, with all technology in its equivalents
Thought is contained in scope of authority of the present invention.
Claims (9)
1. switch element failure detector, uses at the 3 of intelligently voltage boosting machine when vehicle brake is braked
Phase motor driving part can detect the fault of the most several switch element, comprising:
Switching controlling part, with the Push And Release of each described switch element of dutycycle (Duty) different control；
Resistive element portion, is made up of the resistive element being connected with switch element each described；
Voltage determination portion, measures magnitude of voltage at the described 3 interconnective central parts of phase motor；And
Failure detecting section, the voltage determined in utilizing described voltage determination portion is to detect described switch unit
Whether part fault；
Wherein said switch element includes switch element S1, switch element S2, switch element S3, switch
Element S4, switch element S5 and switch element S6；Described resistive element portion include resistive element R1,
Resistive element R2, resistive element R3, resistive element R4, resistive element R5 and resistive element R6；
One end of described resistive element R1 is connected to the source class of described switch element S1, described resistance unit
One end of part R4 is connected to the drain electrode of described switch element S4, the other end of described resistive element R1
It is connected with the other end of resistive element R4, and the other end of described resistive element R1 and resistive element
The other end of R4 is connected to the U phase coil of described 3 phase motors；
One end of described resistive element R2 is connected to the source class of described switch element S2, described resistance unit
One end of part R5 is connected to the drain electrode of described switch element S5, the other end of described resistive element R2
It is connected with the other end of resistive element R5, and the other end of described resistive element R2 and resistive element
The other end of R5 is connected to the V phase coil of described 3 phase motors；
One end of described resistive element R3 is connected to the source class of described switch element S3, described resistance unit
One end of part R6 is connected to the drain electrode of described switch element S6, the other end of described resistive element R3
It is connected with the other end of resistive element R6, and the other end of described resistive element R3 and resistive element
The other end of R6 is connected to the W phase coil of described 3 phase motors.
Switch element failure detector the most according to claim 1, it is characterised in that
Described switch element is field-effect transistor (FET, Field Effect Transistor).
Switch element failure detector the most according to claim 1, it is characterised in that
Described switch element can divide into upper end switch element and lower switch element,
Described switching controlling part, in specific interval, opens described upper end switch element and described lower end
Upper end switch element and described lower switch described in any one or Close All in switch element
Element, makes described 3 phase motors there is the dead space not applying electric current by changing described dutycycle
Between.
Switch element failure detector the most according to claim 1, it is characterised in that
Described failure detecting section, when described 3 phase motor driving part regular event, presetting described electricity
The voltage range measured in pressure determination part,
When the voltage that described voltage determination portion has measured is not belonging to described presetting voltage range, then examine
Survey and there occurs fault for described switch element.
5. switch element fault detection method, as the 3 of the intelligently voltage boosting machine braked for vehicle brake
The method detecting the fault of multiple switch element in phase motor driving part, it is characterised in that include
In the on-off control stage, differently control each open of described switch element with dutycycle (Duty)
Or close；
In the voltage determination stage, measure the magnitude of voltage of the described 3 interconnective cores of phase motor；
In the fault detect stage, utilize the voltage that voltage determination portion measures to detect the event of described switch element
Whether hinder；
Wherein said switch element includes switch element S1, switch element S2, switch element S3, switch
Element S4, switch element S5 and switch element S6；Resistive element portion includes resistive element R1, electricity
Resistance element R2, resistive element R3, resistive element R4, resistive element R5 and resistive element R6；
One end of described resistive element R1 is connected to the source class of described switch element S1, described resistance unit
One end of part R4 is connected to the drain electrode of described switch element S4, the other end of described resistive element R1
It is connected with the other end of resistive element R4, and the other end of described resistive element R1 and resistive element
The other end of R4 is connected to the U phase coil of described 3 phase motors；
One end of described resistive element R2 is connected to the source class of described switch element S2, described resistance unit
One end of part R5 is connected to the drain electrode of described switch element S5, the other end of described resistive element R2
It is connected with the other end of resistive element R5, and the other end of described resistive element R2 and resistive element
The other end of R5 is connected to the V phase coil of described 3 phase motors；
One end of described resistive element R3 is connected to the source class of described switch element S3, described resistance unit
One end of part R6 is connected to the drain electrode of described switch element S6, the other end of described resistive element R3
It is connected with the other end of resistive element R6, and the other end of described resistive element R3 and resistive element
The other end of R6 is connected to the W phase coil of described 3 phase motors.
Switch element fault detection method the most according to claim 5, it is characterised in that
Described switch element is field-effect transistor (FET, Field Effect Transistor).
Switch element fault detection method the most according to claim 5, it is characterised in that
Described switch element divides into upper end switch element and lower switch element,
The described on-off control stage, in specific interval, open described upper end switch element and described under
Described in any one or Close All in end switch element, upper end switch element and described lower end are opened
Close element, make by changing described dutycycle described 3 phase motors exist and do not apply the invalid of electric current
Interval.
Switch element fault detection method the most according to claim 5, it is characterised in that
When described 3 phase motor driving part abnormal operation, presetting survey within the described voltage determination stage
Fixed voltage range,
When the voltage measured in the described voltage determination stage is described presetting voltage range, then institute
State switch element and detect fault.
Switch element fault detection method the most according to claim 8, it is characterised in that
Described presetting voltage range is as each resistive element value connected of described switch element
Carry out different set.
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| KR10-2012-0096971 | 2012-09-03 | ||
| KR1020120096971A KR101895866B1 (en) | 2012-09-03 | 2012-09-03 | Apparatus and Method for Detecting Switching Element Breakdown |
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| KR102156019B1 (en) * | 2014-04-30 | 2020-09-16 | 현대엠엔소프트 주식회사 | Electronic Apparatus for Vehicle |
| KR101684190B1 (en) * | 2015-12-04 | 2016-12-08 | 현대오트론 주식회사 | Apparatus for sensing disorder of 3-phase motor |
| KR102450403B1 (en) * | 2016-02-15 | 2022-10-05 | 학교법인 두원학원 | Circuit for detecting of open status of motor in electric compressor inverter and method thereof |
| CN106841966B (en) * | 2016-12-28 | 2020-05-19 | 广东高标电子科技有限公司 | Method and system for detecting switching tube fault of electric vehicle controller |
| CN107748305B (en) * | 2017-09-26 | 2020-05-19 | 杭州九阳净水系统有限公司 | Water purifier fault detection method and circuit |
| CN109406997B (en) * | 2018-11-30 | 2020-11-10 | 北京新能源汽车股份有限公司 | Method and device for testing active short-circuit relay of motor and storage medium |
| KR102451032B1 (en) * | 2020-09-29 | 2022-10-05 | 엘아이지넥스원 주식회사 | APPARATUS AND METHOD FOR DETECTING A MALFUNTION OF FET(Field Effect Transistor) |
| KR102634848B1 (en) * | 2021-12-03 | 2024-02-06 | 신정훈 | Portable emergency escape device having auto decending speed control function |
| CN114852032A (en) * | 2022-04-02 | 2022-08-05 | 合众新能源汽车有限公司 | Brake switch fault display method, device and system and terminal equipment |
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| KR20140030598A (en) | 2014-03-12 |
| CN103675657A (en) | 2014-03-26 |
| KR101895866B1 (en) | 2018-09-07 |
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