CN108649863A - Diagnostic method, device and the electric machine control system of electric machine control system - Google Patents
Diagnostic method, device and the electric machine control system of electric machine control system Download PDFInfo
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- CN108649863A CN108649863A CN201810482959.1A CN201810482959A CN108649863A CN 108649863 A CN108649863 A CN 108649863A CN 201810482959 A CN201810482959 A CN 201810482959A CN 108649863 A CN108649863 A CN 108649863A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
Abstract
The invention discloses a kind of diagnostic method of electric machine control system, device and electric machine control systems.This method includes：Predeterminated voltage is applied to the turning circuit being made of with the corresponding two-phase of polyphase machine arbitrary two-phase bridge driving branch in multiphase bridge driving circuit, acquires the current information of the corresponding current feedback circuit of arbitrary two-phase bridge driving branch；The diagnostic message of electric machine control system is obtained according to collected current information.The diagnosis scheme that the present invention solves the electric machine control system provided in the relevant technologies there is technical issues that.
Description
Technical field
The present invention relates to electric vehicle fields, in particular to a kind of diagnostic method of electric machine control system, device
And electric machine control system.
Background technology
Currently, electric vehicle divides according to motor type, there are two big technology paths：Direct current generator route and alternating current
Machine route.It is more that direct current generator in electric vehicle develops early stage application, not high because there are rotating speeds, have a spark, electromagnetism to bother greatly,
The shortcomings of needing to regularly replace brush, gradually fade out the arena of history.And using AC induction motor and permanent magnet synchronous motor as representative
Alternating current generator route be current electric vehicle mainstream.
Electric machine control system includes：Motor (permanent magnet synchronous motor and AC induction motor) and inverter two large divisions.Make
Effect for the drive system of electric vehicle, electric machine control system is：According to the control instruction of vehicle, control motor output
Required torque, driving vehicle realize advance, reverse travel, the functions such as energy feedback when braking.Electric machine control system, which exists, to be lost
The possibility of effect, main failure or defective mode include：The open circuit of motor three-phase windings or short circuit, three-phase bridge (IGBT and
MOSFET it) fails, current feedback circuit failure, the power connection wire of motor and controller misses, virtual connection etc..These failure shapes
State can lead to motor-driven exception, or even damage.When above-mentioned failure occurs, failure cause search procedure is not easy to, and is led to
Often requiring a great deal of time could orientation problem with manpower.This just needs electric machine control system itself to have diagnostic function,
It can be diagnosed in time when above-mentioned failure state occurs and obtain failure cause, while also need to record simultaneously failure cause
Corresponding protectiveness processing is made, to improve the safety of electric machine control system, and can quickly be determined when failure occurs
Failure cause, to shorten interval between diagnosis.
To solve the problems, such as preceding diagnosis, partial solution is provided in the related technology, such as：It is opened for three phase bridge circuit
The diagnosis of tubulose state (IGBT or MOSFET) is closed, the IGBT (or MOSFET) that can be diagnosed to be some bridge arm of three-phase bridge is
No failure.For current feedback circuit, it can be diagnosed to be the partial failure of current sensor, such as：The ports AD are damaged, output
Port is shorted to ground or is shorted to power supply.
However, although the technical solution provided in the relevant technologies can solve the problems, such as part diagnosis, there are still limitations
Property, it is mainly manifested in the following：
(1) for machine winding open circuit, motor three-phase imbalance, motor connects loosening with inverter, can not be examined
It is disconnected.
(2) static check is confined to for the diagnosis of current feedback circuit, can not veritably applies a current source and carries out
Dynamic chek.
(3) for the switch tube failure of three phase bridge circuit, intelligent drives chip is depended critically upon.
For above-mentioned problem, currently no effective solution has been proposed.
Invention content
The present invention at least partly embodiment provides a kind of diagnostic method of electric machine control system, device and motor control system
System, with the diagnosis scheme that at least solves the electric machine control system provided in the relevant technologies, there are the technologies of certain limitation to ask
Topic.
According to a wherein embodiment of the invention, a kind of diagnostic method of electric machine control system, electric machine control system are provided
Including：Multiphase bridge driving circuit, polyphase machine and current feedback circuit, this method include：
Conducting to being made of with the corresponding two-phase of polyphase machine arbitrary two-phase bridge driving branch in multiphase bridge driving circuit
Circuit applies predeterminated voltage, acquires the current information of the corresponding current feedback circuit of arbitrary two-phase bridge driving branch；According to adopting
The current information collected obtains the diagnostic message of electric machine control system.
Optionally, include according to the diagnostic message of collected current information acquisition electric machine control system：From current information
Middle the first phase current and the second phase current for choosing polyphase machine；Threshold interval residing for the first phase current and the second phase
Threshold interval residing for electric current obtains diagnostic message.
Optionally, the threshold interval residing for the first phase current and the threshold interval residing for the second phase current obtain diagnosis
Information includes：Obtain the value absolute value of the first phase current and the value absolute value of the second phase current；If the first phase current
The value absolute value of value absolute value and the second phase current is in the threshold being made of the first predetermined threshold value and the second predetermined threshold value
It is worth in section, it is determined that electric machine control system is in normal operating conditions；If the value absolute value of the first phase current and second
At least one of value absolute value of phase current is not in the threshold interval being made of the first predetermined threshold value and the second predetermined threshold value
It is interior, it is determined that the first phase current and/or second beyond the threshold interval being made of the first predetermined threshold value and the second predetermined threshold value
The device of phase current corresponding bridge driving branch road be abnormal or the correspondence two-phase of polyphase machine on device be abnormal.
Optionally, include according to the diagnostic message of collected current information acquisition electric machine control system：From current information
Middle the first phase current and the second phase current for choosing polyphase machine；According to the operation result of the first phase current and the second phase current
Residing threshold interval obtains diagnostic message.
Optionally, the threshold interval residing for the operation result of the first phase current and the second phase current obtains diagnostic message
Including：The difference of the value absolute value of the first phase current and the value absolute value of the second phase current is calculated, then difference is taken absolutely
Value, obtains operation result；If operation result is more than third predetermined threshold value, it is determined that the device in the correspondence two-phase of polyphase machine
At least one of part is abnormal.
Optionally, include according to the diagnostic message of collected current information acquisition electric machine control system：From current information
Choose the third phase current of other phases in addition to the correspondence two-phase of polyphase machine；If the value absolute value of third phase current is big
In the 4th predetermined threshold value, it is determined that the device of third phase current corresponding bridge driving branch road be abnormal or other phases on
Device is abnormal.
Optionally, include according to the diagnostic message of collected current information acquisition electric machine control system：From current information
Choose first phase current and second phase current of the polyphase machine per arbitrary two-phase；According to the of each arbitrary two-phase of polyphase machine
The comparison result of one phase current and the second phase current obtains diagnostic message.
Optionally, it is obtained according to the comparison result of the first phase current of each arbitrary two-phase of polyphase machine and the second phase current
Diagnostic message includes：Obtain the value absolute value and the second phase current of the first phase current of polyphase machine each arbitrary two-phase
Value absolute value；If the value absolute value of the first phase current and the taking for the second phase current of each arbitrary two-phase of polyphase machine
It is worth absolute value approximately equal, it is determined that electric machine control system is in normal operating conditions；If each arbitrary two-phase of polyphase machine
One of which combination the first phase current value absolute value and the second phase current value absolute value approximately equal, remaining
The value absolute value of first phase current of each group combination and the value absolute value also approximately equal of the second phase current, and wherein
The value absolute value of first phase current of one group of combination and the value absolute value of the second phase current are more than the of remaining each group combination
The value absolute value of one phase current and the value absolute value of the second phase current, it is determined that except one of which combines in polyphase machine
Except the remaining connection mutually between multiphase bridge driving circuit be abnormal.
According to a wherein embodiment of the invention, a kind of diagnostic device of electric machine control system, motor control system are additionally provided
System includes：Multiphase bridge driving circuit, polyphase machine and current feedback circuit, the device include：
Acquisition module, for driving branch corresponding with polyphase machine two by arbitrary two-phase bridge in multiphase bridge driving circuit
The turning circuit mutually constituted applies predeterminated voltage, acquires the electric current of the corresponding current feedback circuit of arbitrary two-phase bridge driving branch
Information；Acquisition module, the diagnostic message for obtaining electric machine control system according to collected current information.
According to a wherein embodiment of the invention, a kind of electric machine control system is additionally provided, including：Above-mentioned motor control system
The diagnostic device of system.
In the present invention at least partly in embodiment, using in multiphase bridge driving circuit by arbitrary two-phase bridge driving branch with
The turning circuit that the correspondence two-phase of polyphase machine is constituted applies predeterminated voltage, acquires the corresponding electricity of arbitrary two-phase bridge driving branch
The mode of the current information of current feedback circuit obtains the diagnostic message of electric machine control system by collected current information, should
Electric machine control system includes：Multiphase bridge driving circuit, polyphase machine and current feedback circuit have reached raising motor control system
The purpose of system safety, to realize the coverage for improving diagnosis, it is ensured that the functional safety of electric machine control system, and
Be conducive to quickly locate the technique effect of reason when problem occurs, and then solve the motor provided in the relevant technologies
The diagnosis scheme of control system there is technical issues that.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the diagnostic method of electric machine control system according to the ... of the embodiment of the present invention；
Fig. 2 is the schematic diagram according to the present invention wherein electric machine control system of a preferred embodiment；
Fig. 3 is the structure diagram of the diagnostic device of electric machine control system according to the ... of the embodiment of the present invention.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work should all belong to what the present invention protected
Range.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that making in this way
Data can be interchanged in the appropriate case, so that the embodiment of the present invention described herein can be in addition to scheming herein
Sequence other than those of showing or describe is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment
Those of be not necessarily limited to clearly to list step or unit, but may include not listing clearly or for these processes,
The intrinsic other steps of method, product or equipment or unit.
According to a wherein embodiment of the invention, for machine winding, current feedback circuit, the function of motor-drive circuit
The connection status of integrality and motor and inverter provides a kind of method implementation of the diagnostic method of electric machine control system
Example, it should be noted that step shown in the flowchart of the accompanying drawings can be in the calculating of such as a group of computer-executable instructions
It is executed in machine system, although also, logical order is shown in flow charts, and it in some cases, can be to be different from
Sequence herein executes shown or described step.
Fig. 1 is the flow chart of the diagnostic method of electric machine control system according to the ... of the embodiment of the present invention, electric machine control system packet
It includes：Multiphase bridge driving circuit, polyphase machine and current feedback circuit, as shown in Figure 1, this method comprises the following steps：
Step S12, to driving branch two-phase structure corresponding with polyphase machine by arbitrary two-phase bridge in multiphase bridge driving circuit
At turning circuit apply predeterminated voltage, acquire the current information of the corresponding current feedback circuit of arbitrary two-phase bridge driving branch；
Step S14 obtains the diagnostic message of electric machine control system according to collected current information.
Through the above steps, it may be used to driving branch and polyphase machine by arbitrary two-phase bridge in multiphase bridge driving circuit
The turning circuit that constitutes of correspondence two-phase apply predeterminated voltage, acquire the corresponding current feedback electricity of arbitrary two-phase bridge driving branch
The mode of the current information on road obtains the diagnostic message of electric machine control system, motor control by collected current information
System includes：Multiphase bridge driving circuit, polyphase machine and current feedback circuit have reached raising electric machine control system safety
Purpose, to realize the coverage for improving diagnosis, it is ensured that the functional safety of electric machine control system, and asking
Be conducive to quickly locate the technique effect of reason when topic, and then solve the electric machine control system provided in the relevant technologies
Diagnosis scheme there is technical issues that.
The present invention at least partly embodiment needs are realized by means of following principle：
(1) it can determine that in a circuit, electric current is identical according to Thevenin's theorem, the normal feelings of current feedback circuit
Under condition, the difference in two current values measured is within the scope of allowable error.
(2) pulse width modulation (PWM) technology is utilized to apply controllable voltage on the terminal of motor, it is ensured that electric current will not
It is excessive, avoid device from being burned out.
(3) when termination contact loosens, contact resistance can become larger.When applying identical voltage, if motor and inverter
Between connection loosen, then electric current can become smaller.
(4) if exception occurs in the switching tube on multiphase bridge driving circuit, it is unable to normally, then electric current can not be just
Often pass through.Therefore, the electric current measured is 0.
Fig. 2 is the schematic diagram according to the present invention wherein electric machine control system of a preferred embodiment.As shown in Fig. 2, the electricity
Machine control system includes：Motor 1, inverter 2 and current feedback circuit 3, wherein inverter 2 is multiphase bridge driving circuit,
Preferably three-phase bridge driving circuit.Three-phase bridge driving circuit includes：A phase bridges drive branch, B phase bridges driving branch and C phase bridges to drive
Dynamic branch.A phase bridges driving branch road is provided with switching tube S1 and S4.B phase bridges driving branch road is provided with switching tube S2 and S5.C
Phase bridge driving branch road is provided with switching tube S3 and S6.
By controlling being turned on and off for switching tube S1, S5 (or S2, S4), apply certain electricity in A, B two-phase of motor
V, control electric current is pressed to be flowed in the two-phase of motor, the current signal of acquisition current feedback circuit A, B and C, iA1, iB1, iC1.
By controlling being turned on and off for switching tube S1, S6 (or S3, S4), apply certain electricity in A, C two-phase of motor
V, control electric current is pressed to be flowed in the two-phase of motor, the current signal of acquisition current feedback circuit A, B and C, iA2, iB2, iC2.
By controlling being turned on and off for switching tube S2, S6 (or S3, S5), apply certain electricity in B, C two-phase of motor
V, control electric current is pressed to be flowed in the two-phase of motor, the current signal of acquisition current feedback circuit A, B and C, iA3, iB3, iC3.
Motor control system status is judged according to collected current signal.In the ideal situation, above-mentioned electric current
Numerical value differs within the range of permission.If there is current anomaly, can be judged according to specific circumstances.
It should be noted that will be solved by taking three-phase bridge driving circuit as an example in each optional embodiment subsequently introduced
Explanation is released, but it does not constitute the improper restriction to the present invention.For four phase bridge driving circuits, five phase bridge driving circuits etc. its
His multiphase bridge driving circuit can equally be applicable in the present invention technical solution that at least partly embodiment is provided.
Optionally, in step S14, the diagnostic message that electric machine control system is obtained according to collected current information can
To include step performed below：
Step S141 chooses the first phase current and the second phase current of polyphase machine from current information；
Step S142, the threshold interval acquisition residing for the threshold interval and the second phase current residing for the first phase current are examined
Disconnected information.
Branch and B phase bridges driving branch and three-phase are driven with the A phase bridges in the three-phase bridge driving circuit provided in Fig. 2
It, can be according to the threshold interval residing for A phase currents (being equivalent to above-mentioned first phase current) for A phases and B in motor are conducted
Diagnostic message is obtained with the threshold interval residing for B phase currents (being equivalent to above-mentioned second phase current).
Optionally, in step S142, the threshold residing for threshold interval and the second phase current residing for the first phase current
It may include step performed below that value section, which obtains diagnostic message,：
Step S1421 obtains the value absolute value of the value absolute value and the second phase current of the first phase current；
Step S1422, if the value absolute value of the first phase current and the value absolute value of the second phase current be in by
In the threshold interval of first predetermined threshold value and the second predetermined threshold value composition, it is determined that electric machine control system is in normal work shape
State；If at least one of the value absolute value of the first phase current and the value absolute value of the second phase current are not in by first
In the threshold interval of predetermined threshold value and the second predetermined threshold value composition, it is determined that beyond by the first predetermined threshold value and the second default threshold
The device of the first phase current and/or the second phase current corresponding bridge driving the branch road of the threshold interval of value composition is abnormal
Or the device in the correspondence two-phase of polyphase machine is abnormal.
If the value absolute value of A phase currents and the value absolute value of B phase currents are respectively positioned on by the first predetermined threshold value and
In the threshold interval of two predetermined threshold values composition, it is determined that electric machine control system is in normal operating conditions.
If the value absolute value of A phase currents and the value absolute value of B phase currents are respectively less than the 4th predetermined threshold value, really
The device for determining A phase bridges driving branch and/or B phase bridges driving branch road be abnormal or the A phases and B phases of polyphase machine on device
Part is abnormal.It needs to make a concrete analysis of by subsequent operation as the concrete reason being abnormal, leads to above-mentioned abnormal original
Because generally including following one：
(1) the A phases or B phases of three phase electric machine and electric machine controller are not connected；
(2) switching tube S1, S5 or switching tube S2, S4 cannot be connected；
(3) the A phases of three phase electric machine and B phase winding open circuits；
(4) A phase currents sensor may fail；
(5) B phase currents sensor may fail.
If the value absolute value of A phase currents is located at the threshold interval being made of the first predetermined threshold value and the second predetermined threshold value
Interior and B phase currents value absolute value is respectively less than the 4th predetermined threshold value, it is determined that B phase currents sensor may fail.
If the value absolute value of B phase currents is located at the threshold interval being made of the first predetermined threshold value and the second predetermined threshold value
Interior and A phase currents value absolute value is respectively less than the 4th predetermined threshold value, it is determined that A phase currents sensor may fail.
Optionally, in step S14, the diagnostic message that electric machine control system is obtained according to collected current information can
To include step performed below：
Step S143 chooses the first phase current and the second phase current of polyphase machine from current information；
Step S144, the threshold interval residing for the operation result of the first phase current and the second phase current obtain diagnosis letter
Breath.
In a preferred implementation process, in step S144, according to the operation result of the first phase current and the second phase current institute
It may include step performed below that the threshold interval at place, which obtains diagnostic message,：
Step S1441 calculates the difference of the value absolute value of the first phase current and the value absolute value of the second phase current,
It takes absolute value again to difference, obtains operation result；
Step S1442, if operation result is more than third predetermined threshold value, it is determined that in the correspondence two-phase of polyphase machine
At least one of device is abnormal.
By the difference of the value absolute value and the value absolute value of B phase currents of calculating A phase currents, then difference is taken absolutely
To value, operation result is obtained.If operation result is more than third predetermined threshold value, it is determined that at least one of：A phase currents pass
Sensor may fail, B phase currents sensor may fail.
Optionally, in step S14, the diagnostic message that electric machine control system is obtained according to collected current information can
To include step performed below：
Step S145 chooses the third phase current of other phases in addition to the correspondence two-phase of polyphase machine from current information；
Step S146, if the value absolute value of third phase current is more than the 4th predetermined threshold value, it is determined that third phase current
The device of corresponding bridge driving branch road be abnormal or other phases on device be abnormal.
A phase bridges driving branch and B phase bridges driving branch in three-phase bridge driving circuit and the A phases and B in three phase electric machine
In the case of being conducted, if the value absolute value of C phase currents is all higher than the 4th predetermined threshold value, it is determined that following scenario described occurs
At least one：
(1) switching tube S3, S6 may fail；
(2) C phase currents sensor may fail.
Specific Rule of judgment below in conjunction with table 1 to table 3 for the diagnostic message of electric machine control system does further solution
Release explanation.
C1 (being equivalent to above-mentioned 4th predetermined threshold value), C2 in following table 1 to table 3 (are equivalent to the above-mentioned second default threshold
Value), C3 (being equivalent to above-mentioned first predetermined threshold value), C4 (being equivalent to above-mentioned third predetermined threshold value), wherein C3 be less than C2, C1 and
C4 is respectively less than C3, without fixed size relationship between C1 and C4.In addition, " --- " indicates without concern.
Table 1 is to be conducted in motor AB, the correspondence of each phase current and diagnostic message.As shown in table 1,
Table 1
Table 2 is to be conducted in motor AC, the correspondence of each phase current and diagnostic message.As shown in table 2,
Table 2
Table 3 is to be conducted in motor BC, the correspondence of each phase current and diagnostic message.As shown in table 3,
Table 3
Optionally, in step S14, the diagnostic message that electric machine control system is obtained according to collected current information can
To include step performed below：
Step S147 chooses first phase current and second phase current of the polyphase machine per arbitrary two-phase from current information；
Step S148 is obtained according to the comparison result of the first phase current of each arbitrary two-phase of polyphase machine and the second phase current
Take diagnostic message.
In a preferred implementation process, in step S148, according to the first phase current of each arbitrary two-phase of polyphase machine and
It may include step performed below that the comparison result of second phase current, which obtains diagnostic message,：
Step S1481 obtains the value absolute value and two phase electricity of the first phase current of each arbitrary two-phase of polyphase machine
The value absolute value of stream；
Step S1482, if the value absolute value and two phase electricity of the first phase current of each arbitrary two-phase of polyphase machine
The value absolute value approximately equal of stream, it is determined that electric machine control system is in normal operating conditions；If each of polyphase machine
The value absolute value approximation phase of the value absolute value and the second phase current of first phase current of the one of which combination for two-phase of anticipating
Deng the value absolute value of the first phase current of, remaining each group combination and the value absolute value also approximately equal of the second phase current, and
And the value absolute value of the first phase current of one of which combination and the value absolute value of the second phase current are more than remaining each group group
The value absolute value of the value absolute value and the second phase current of the first phase current closed, it is determined that wherein one is removed in polyphase machine
The remaining connection mutually between multiphase bridge driving circuit except group combination is abnormal.
Table 4 be motor terminal contact whether the correspondence of good Rule of judgment and diagnostic message.As shown in table 4,
Table 4
As seen from the above table, if be conducted in motor AB, the value absolute value of A phase currents | iA1 | with B phase electricity
The value absolute value of stream | iB1 | approximately equal is conducted in motor AC, the value absolute value of A phase currents | iA2 | with C
The value absolute value of phase current | iC2 | approximately equal, and be conducted in motor BC, the value absolute value of B phase currents
| iB3 | the value absolute value with C phase currents | iC3 | approximately equal, and in aforementioned three kinds approximately equals two-by-two, then
Determine that electric machine control system is in normal operating conditions.
If the value absolute value and second of the first phase current of the one of which combination of each arbitrary two-phase of three phase electric machine
The value absolute value approximately equal of phase current, such as：| iB3 | ≈ | iC3 |, and first phase current of remaining each group combination takes
It is worth the value absolute value of absolute value and the second phase current also approximately equal, such as：| iA1 | ≈ | iB1 | ≈ | iA2 | ≈ | iC2 |,
And the value absolute value of the first phase current of one of which combination and the value absolute value of the second phase current are more than remaining each group
The value absolute value of the value absolute value and the second phase current of first phase current of combination, such as：(|iA1| ≈|iB1|≈|
iA2|≈|iC2|)<(| iB3 | ≈ | iC3 |), it is determined that remaining phase and multiphase in polyphase machine in addition to one of which combines
Connection between bridge driving circuit is abnormal, that is, it is conducted in motor BC, motor A phase terminal poor contacts, and electricity
Machine A phase winding resistances are excessive.
Through the above technical solutions, not only motor body can be directed to realize with diagnosing motor winding with the presence or absence of exception
Diagnosis, but also diagnosing motor may be implemented and whether inverter is reliably connected or is not connected with, to diagnose from inverter
Itself, extends to electric machine control system, extends the range of diagnosis.By to motor two-phase combination of two and two-phase it
Between apply voltage and can obtain a stable current source, and then can dynamic implement diagnosis current feedback circuit it is whether normal.Separately
Outside, whether each switching tube state that three-phase bridge driving circuit can also be analyzed from three-phase current feedback signal message fails.
The above analysis, the technical solution that the present invention at least partly embodiment is provided will not increase motor control system
The hardware cost of system, and only need to increase diagnostic software.By in each phase of alternating current generator, combination of two is led between two-phase
It crosses PWM modulation technology and applies predeterminated voltage, a current source is created, to acquire phase current.Believed by collected whole electric currents
Breath combines control voltage, can analyze machine winding with the presence or absence of exception, motor connect whether normal, electric current with inverter
Whether whether normal and electric machine control system the three-phase bridge driving circuit of feedback circuit is normal.These diagnostic messages are for motor
Control system is most important, can improve the safety of electric machine control system, and then improve vehicle security, and problem is occurring
When be conducive to quickly locate reason.
According to a wherein embodiment of the invention, for machine winding, current feedback circuit, the function of motor-drive circuit
It is real to additionally provide a kind of method of the diagnostic device of electric machine control system for the connection status of integrality and motor and inverter
Apply example.
Fig. 3 is the structure diagram of the diagnostic device of electric machine control system according to the ... of the embodiment of the present invention, electric machine control system
Including：Multiphase bridge driving circuit, polyphase machine and current feedback circuit, as shown in figure 3, the device includes：Acquisition module 10,
For the turning circuit to being made of with the corresponding two-phase of polyphase machine arbitrary two-phase bridge driving branch in multiphase bridge driving circuit
Apply predeterminated voltage, acquires the current information of the corresponding current feedback circuit of arbitrary two-phase bridge driving branch；Acquisition module 20,
Diagnostic message for obtaining electric machine control system according to collected current information.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
In the above embodiment of the present invention, all emphasizes particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, it can be by other
Mode realize.Wherein, the apparatus embodiments described above are merely exemplary, for example, the unit division, can be with
For a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine
Or it is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed phase
Coupling, direct-coupling or communication connection between mutually can be the INDIRECT COUPLING or logical by some interfaces, unit or module
Letter connection, can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
On unit.Some or all of unit therein can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention essence
On all or part of the part that contributes to existing technology or the technical solution can be with the shape of software product in other words
Formula embodies, which is stored in a storage medium, including some instructions are used so that a calculating
Machine equipment (can be personal computer, server or network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes：USB flash disk, is deposited at read-only memory (ROM, Read-Only Memory) at random
Access to memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store program generation
The medium of code.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of diagnostic method of electric machine control system, which is characterized in that the electric machine control system includes：Multiphase bridge driving electricity
Road, polyphase machine and current feedback circuit, the method includes：
To what is be made of with the corresponding two-phase of the polyphase machine arbitrary two-phase bridge driving branch in the multiphase bridge driving circuit
Turning circuit applies predeterminated voltage, acquires the current information of the corresponding current feedback circuit of arbitrary two-phase bridge driving branch；
The diagnostic message of electric machine control system is obtained according to the collected current information.
2. according to the method described in claim 1, it is characterized in that, obtaining the motor according to the collected current information
The diagnostic message of control system includes：
The first phase current and the second phase current of the polyphase machine are chosen from the current information；
Threshold interval residing for threshold interval and second phase current residing for first phase current is examined described in obtaining
Disconnected information.
3. according to the method described in claim 2, it is characterized in that, the threshold interval residing for first phase current and institute
Stating the acquisition of the threshold interval residing for the second phase current diagnostic message includes：
Obtain the value absolute value of the value absolute value and second phase current of first phase current；
If the value absolute value of the value absolute value of first phase current and second phase current is in pre- by first
If in the threshold interval of threshold value and the second predetermined threshold value composition, it is determined that the electric machine control system is in normal operating conditions；
If at least one of the value absolute value of the value absolute value of first phase current and second phase current be not in by
In the threshold interval of first predetermined threshold value and second predetermined threshold value composition, it is determined that beyond by the described first default threshold
Value bridge corresponding with first phase current for the threshold interval that second predetermined threshold value forms and/or second phase current
The device of driving branch road be abnormal or the correspondence two-phase of the polyphase machine on device be abnormal.
4. according to the method described in claim 1, it is characterized in that, obtaining the motor according to the collected current information
The diagnostic message of control system includes：
The first phase current and the second phase current of the polyphase machine are chosen from the current information；
Threshold interval residing for the operation result of first phase current and second phase current, which obtains the diagnosis, to be believed
Breath.
5. according to the method described in claim 4, it is characterized in that, according to first phase current and second phase current
Threshold interval residing for operation result obtains the diagnostic message：
The difference of the value absolute value of first phase current and the value absolute value of second phase current is calculated, then to described
Difference takes absolute value, and obtains the operation result；
If the operation result is more than third predetermined threshold value, it is determined that in the device in the correspondence two-phase of the polyphase machine extremely
It is one of few to be abnormal.
6. according to the method described in claim 1, it is characterized in that, obtaining the motor according to the collected current information
The diagnostic message of control system includes：
The third phase current of other phases in addition to the correspondence two-phase of the polyphase machine is chosen from the current information；
If the value absolute value of the third phase current is more than the 4th predetermined threshold value, it is determined that the third phase current is corresponding
The device of bridge driving branch road be abnormal or other described phases on device be abnormal.
7. according to the method described in claim 1, it is characterized in that, obtaining the motor according to the collected current information
The diagnostic message of control system includes：
First phase current and second phase current of the polyphase machine per arbitrary two-phase are chosen from the current information；
It is examined according to described in the acquisition of the comparison result of the first phase current of each arbitrary two-phase of the polyphase machine and the second phase current
Disconnected information.
8. the method according to the description of claim 7 is characterized in that according to the first phase of each arbitrary two-phase of the polyphase machine
The comparison result of electric current and the second phase current obtains the diagnostic message：
The value of the value absolute value and the second phase current that obtain the first phase current of each arbitrary two-phase of the polyphase machine is exhausted
To value；
If the value absolute value of the first phase current of each arbitrary two-phase of polyphase machine and the value of the second phase current are exhausted
To being worth approximately equal, it is determined that the electric machine control system is in normal operating conditions；If the polyphase machine is each arbitrary
The value absolute value approximately equal of the value absolute value and the second phase current of first phase current of the one of which combination of two-phase,
The value absolute value of first phase current of remaining each group combination and the value absolute value of the second phase current also approximately equal, and wherein
The value absolute value of first phase current of one group of combination and the value absolute value of the second phase current are more than the of remaining each group combination
The value absolute value of one phase current and the value absolute value of the second phase current, it is determined that one of which group is removed in the polyphase machine
The remaining connection mutually between the multiphase bridge driving circuit except conjunction is abnormal.
9. a kind of diagnostic device of electric machine control system, which is characterized in that the electric machine control system includes：Multiphase bridge driving electricity
Road, polyphase machine and current feedback circuit, described device include：
Acquisition module, for pair to driving branch and the polyphase machine in the multiphase bridge driving circuit by arbitrary two-phase bridge
It answers the turning circuit that two-phase is constituted to apply predeterminated voltage, acquires the corresponding current feedback circuit of arbitrary two-phase bridge driving branch
Current information；
Acquisition module, the diagnostic message for obtaining electric machine control system according to the collected current information.
10. a kind of electric machine control system, which is characterized in that including：The diagnosis of electric machine control system described in claim 9 fills
It sets.
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| CN110021914A (en) * | 2019-04-16 | 2019-07-16 | 广州技诺智能设备有限公司 | Vending machine, DC motor control system and DC motor control method and device |
| CN112034384A (en) * | 2020-08-05 | 2020-12-04 | 苏州汇川联合动力系统有限公司 | Method, device and computer-readable storage medium for identifying short circuit of motor system |
| CN113839603A (en) * | 2020-06-08 | 2021-12-24 | 杭州先途电子有限公司 | Control method, control system and controller |
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| CN112034384A (en) * | 2020-08-05 | 2020-12-04 | 苏州汇川联合动力系统有限公司 | Method, device and computer-readable storage medium for identifying short circuit of motor system |
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