CN110011278A - A kind of electric motor short circuit guard method and device - Google Patents
A kind of electric motor short circuit guard method and device Download PDFInfo
- Publication number
- CN110011278A CN110011278A CN201910283675.4A CN201910283675A CN110011278A CN 110011278 A CN110011278 A CN 110011278A CN 201910283675 A CN201910283675 A CN 201910283675A CN 110011278 A CN110011278 A CN 110011278A
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- Prior art keywords
- vehicle
- motor speed
- preset
- threshold value
- machine controller
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
- H02H7/0844—Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error
Abstract
The present embodiments relate to over-voltage protection technique field, a kind of electric motor short circuit guard method and device are disclosed, comprising: detect whether the condenser voltage in the electric machine controller of vehicle is more than preset voltage threshold；If being more than, judge whether the motor speed of vehicle is less than or equal to preset rotary speed threshold value；If the motor speed of vehicle is less than or equal to preset rotary speed threshold value, the power device controlled in electric machine controller forbids open pipe, and forbids enabling active short-circuit protection scheme.Implement the embodiment of the present invention, can reduce power device or electric machine controller the failure even probability of damage.
Description
Technical field
The present invention relates to over-voltage protection technique fields, and in particular to a kind of electric motor short circuit guard method and device.
Background technique
It, may be due to vehicular electric machine counter electromotive force when vehicle disconnects the main relay of vehicular electric machine in the state of failure
Flow backward or the of short duration charging of charger, leads to the voltage rapid increase on the capacitor in electric machine controller, and then may lead
Send a telegraph in machine controller power device (such as: insulated gate bipolar transistor, Insulated Gate Bipolar
Transistor, IGBT) damage, or even influence the vehicle safety of vehicle.Currently, being typically all to be protected by following active short circuits
Shield scheme avoids above-mentioned risk: when detecting that voltage on the capacitor in electric machine controller is more than preset threshold value, control
Three in IGBT in electric machine controller processed upper bridges or three lower bridges are opened, and to make machine winding short-circuit, and then allow vehicle
Counter electromotive force of motor machine winding generate heat by way of consume.
In practice, it has been found that blindly enabling above-mentioned active short circuit once breaking down if not distinguishing the specific operating condition of vehicle
Protection scheme, since the counter electromotive force that vehicular electric machine flows backward all acts on three in IGBT upper bridges or three lower bridges,
The power device failure that may cause in electric machine controller even damages；Moreover, machine winding transcient short circuit time has biggish wink
State electric current, the transient current may cause magnetic steel of motor loss of excitation, and then electric machine controller failure is caused even to damage.
As it can be seen that blindly enabling above-mentioned active short-circuit protection scheme, power device or electric machine controller failure may cause
Even damage.
Summary of the invention
The embodiment of the invention discloses a kind of electric motor short circuit guard method and devices, can reduce power device or motor
Controller the failure even probability of damage.
First aspect of the embodiment of the present invention discloses a kind of electric motor short circuit guard method, this method comprises:
Whether the condenser voltage detected in the electric machine controller of vehicle is more than preset voltage threshold；If being more than, judgement
Whether the motor speed of the vehicle is less than or equal to preset rotary speed threshold value；
If the motor speed of the vehicle is less than or equal to the preset rotary speed threshold value, control in the electric machine controller
Power device forbid open pipe, and forbid enable active short-circuit protection scheme.
As an alternative embodiment, in first aspect of the embodiment of the present invention, the motor in the vehicle
When revolving speed is less than or equal to the preset rotary speed threshold value, controls the power device in the electric machine controller and forbid open pipe, and
Forbid enabling active short-circuit protection scheme, comprising:
When the motor speed of the vehicle is zero and is less than the preset rotary speed threshold value, the electric machine controller is controlled
In power device forbid open pipe, and forbid enable active short-circuit protection scheme；
Alternatively, when the motor speed of the vehicle is greater than zero and is less than or equal to preset rotary speed threshold value, described in control
The state of power device in electric machine controller switches to pass pipe by open pipe, and forbids enabling active short-circuit protection scheme.
As an alternative embodiment, in first aspect of the embodiment of the present invention, the method also includes:
If the motor speed of the vehicle is greater than the preset rotary speed threshold value, the active short-circuit protection scheme is enabled.
As an alternative embodiment, in first aspect of the embodiment of the present invention, it is short in the enabling active
After the protection scheme of road, the method also includes:
Judge transient current whether is detected in the electric machine controller, the transient current is for pre-set current value and in advance
If generating the electric current of number；
If detecting the transient current, prompt information is exported, the prompt information is for prompting vehicle described in user's control
Reduction of speed, to allow the motor speed of the vehicle to be decreased to less than or be equal to the preset rotary speed threshold value；
When the motor speed for detecting the vehicle is less than or equal to the preset rotary speed threshold value, the motor is controlled
The state of power device in controller is switched by open pipe closes pipe, and deactivates the active short-circuit protection scheme.
As an alternative embodiment, in first aspect of the embodiment of the present invention, in the judgement vehicle
Whether motor speed is less than or equal to before preset rotary speed threshold value, the method also includes:
Obtain vehicle maximum motor speed in the target time period and minimum motor speed；Wherein, the mesh
The duration for marking the period is less than or equal to preset duration threshold value；
The average value of the maximum motor speed and minimum motor speed in the target time section is calculated as the vehicle
Motor speed.
As an alternative embodiment, existing in first aspect of the embodiment of the present invention in the acquisition vehicle
After maximum motor speed and minimum motor speed in target time section, the method also includes:
It is preset to judge whether the difference of the maximum motor speed and the minimum motor speed is less than or equal to
Difference threshold；
If the maximum motor speed and the difference of the minimum motor speed are less than or equal to preset difference threshold
Described in the average value of value, the execution maximum motor speed calculated in the target time section and minimum motor speed is used as
The step of motor speed of vehicle.
Second aspect of the embodiment of the present invention discloses a kind of electric motor short circuit guard method, this method comprises:
When detecting vehicle when being charged, judge whether the main relay in the battery pack of the vehicle disconnects；
If the main relay disconnects, the charger for disconnecting and charging to the vehicle in the main relay is judged
The moment not disconnected, the electric energy that the charger is transmitted to the vehicle whether allow the vehicle electric machine controller in capacitor
Voltage on device is increased over preset voltage threshold；
If being more than, control the power device in the electric machine controller and forbid open pipe, and forbids enabling active short-circuit protection
Scheme.
The third aspect of the embodiment of the present invention discloses a kind of electric motor short circuit protective device, which includes:
First detection unit, whether the condenser voltage in electric machine controller for detecting vehicle is more than preset voltage
Threshold value；
First judging unit, for the capacitor electricity in the electric machine controller that the first detection unit detects vehicle
When pressure is more than preset voltage threshold, judge whether the motor speed of the vehicle is less than or equal to preset rotary speed threshold value；
First control unit, for judging that the motor speed of the vehicle is less than or equal in first judging unit
It when the preset rotary speed threshold value, controls the power device in the electric machine controller and forbids open pipe, and forbid enabling actively short
Road protection scheme.
As an alternative embodiment, the first control unit is used in second aspect of the embodiment of the present invention
When first judging unit judges the motor speed of the vehicle less than or equal to the preset rotary speed threshold value, control
Power device in the electric machine controller forbids open pipe, and forbids enabling the mode of active short-circuit protection scheme specifically:
First control unit, for judging that the motor speed of the vehicle is zero and is less than in first judging unit
It when the preset rotary speed threshold value, controls the power device in the electric machine controller and forbids open pipe, and forbid enabling actively short
Road protection scheme；
Alternatively, for judging the motor speed of the vehicle in first judging unit greater than zero and being less than or equal to
When preset rotary speed threshold value, the state for controlling the power device in the electric machine controller switches to pass pipe by open pipe, and forbids
Enable active short-circuit protection scheme.
As an alternative embodiment, in second aspect of the embodiment of the present invention, described device further include:
Unit is enabled, for judging that it is described preset that the motor speed of the vehicle is greater than in first judging unit
Rotary speed threshold value enables the active short-circuit protection scheme.
As an alternative embodiment, in second aspect of the embodiment of the present invention, described device further include:
Second judgment unit, for judging in institute after the enabling unit enables the active short-circuit protection scheme
It states and whether detects transient current in electric machine controller, the transient current is pre-set current value and the default electricity for generating number
Stream；
Output unit, it is described for when the second judgment unit detects the transient current, exporting prompt information
Prompt information is described to allow the motor speed of the vehicle to be decreased to less than or be equal to for prompting vehicle reduction of speed described in user's control
Preset rotary speed threshold value；
Second control unit, for being less than or equal to the preset revolving speed threshold in the motor speed for detecting the vehicle
When value, the state for controlling the power device in the electric machine controller is switched by open pipe closes pipe, and deactivates the active short circuit and protect
Shield scheme.
As an alternative embodiment, in second aspect of the embodiment of the present invention, described device further include:
Acquiring unit, for judging whether the motor speed of the vehicle is less than or equal in first judging unit
Before preset rotary speed threshold value, vehicle maximum motor speed in the target time period and minimum motor speed are obtained；
Wherein, the duration of the target time section is less than or equal to preset duration threshold value；
Computing unit, for calculating being averaged for maximum motor speed in the target time section and minimum motor speed
It is worth the motor speed as the vehicle.
As an alternative embodiment, in second aspect of the embodiment of the present invention, described device further include:
Third judging unit turns for obtaining the maximum motor of the vehicle in the target time period in the acquiring unit
After speed and minimum motor speed, judge whether the maximum motor speed and the difference of the minimum motor speed are less than
Or it is equal to preset difference threshold；
And the computing unit, specifically for the third judging unit judge the maximum motor speed with
And the difference of the minimum motor speed calculates in the target time section most when being less than or equal to preset difference threshold
Motor speed of the average value of big motor speed and minimum motor speed as the vehicle.
Present aspect embodiment fourth aspect discloses a kind of electric motor short circuit protective device, which includes:
First judging unit judges the master in the battery pack of the vehicle for detecting vehicle when being charged
Whether relay disconnects；
Second judgment unit, for the main relay in the battery pack that first judging unit judges the vehicle
When disconnection, judge in the moment that the main relay disconnects and the charger that charges to the vehicle does not disconnect, it is described to fill
The electric energy that motor is transmitted to the vehicle whether allow the vehicle electric machine controller in capacitor on voltage rise to it is super
Cross preset voltage threshold；
Control unit, for judging that the charger is transmitted to the electric energy of the vehicle and allows in the second judgment unit
When the voltage on capacitor in the electric machine controller of the vehicle is increased over the preset voltage threshold, described in control
Power device in electric machine controller forbids open pipe, and forbids enabling active short-circuit protection scheme.
The 5th aspect of the embodiment of the present invention discloses a kind of electric motor short circuit protective device, comprising:
It is stored with the memory of executable program code；
The processor coupled with the memory；
The processor calls the executable program code stored in the memory, executes the embodiment of the present invention the
A kind of electric motor short circuit disclosed in a kind of electric motor short circuit guard method and second aspect of the embodiment of the present invention disclosed in one side is protected
Maintaining method.
The 6th aspect of the embodiment of the present invention discloses a kind of computer readable storage medium, stores computer program, wherein
The computer program makes computer execute a kind of electric motor short circuit guard method disclosed in first aspect of the embodiment of the present invention, with
And a kind of electric motor short circuit guard method disclosed in second aspect of the embodiment of the present invention.
The 7th aspect of the embodiment of the present invention discloses a kind of computer program product, when the computer program product is calculating
When being run on machine, so that the computer executes some or all of any one method of first aspect of embodiment of the present invention step
Suddenly.
Eighth aspect of the embodiment of the present invention discloses a kind of using distribution platform, and the application distribution platform is for issuing calculating
Machine program product, wherein when the computer program product is run on computers, so that the computer executes the present invention
Some or all of any one method of embodiment first aspect step.
Compared with prior art, the embodiment of the present invention has the advantages that
In present aspect embodiment, when the motor speed of vehicle is zero, if detecting the electricity in the electric machine controller of vehicle
Voltage on container is more than preset voltage threshold, and the power device controlled in electric machine controller forbids open pipe, also forbids enabling
Active short-circuit protection scheme can allow voltage superposition on capacitor because forbidding the power device open pipe in electric machine controller
On six bridge arms in power device, compared to active short-circuit protection scheme is enabled, allow the voltage superposition on capacitor in function
In rate device on the bridge arm of three upper bridges or three lower bridges, there is higher proof voltage, thereby reduce power device damage
Bad probability；
And when the motor speed of vehicle is greater than zero and is less than or equal to preset rotary speed threshold value, if detecting vehicle
Electric machine controller in capacitor on voltage be more than preset voltage threshold, control the power device in electric machine controller
State switches to pass pipe by open pipe, and forbids enabling active short-circuit protection scheme；Because the motor speed of vehicle is greater than zero, that is, say
Bright vehicle has been started up, and power device is to carry out open pipe according to preset frequency or close pipe at this time, so forbidding enabling actively
Short-circuit protection scheme directly controls power device in electric machine controller and closes pipe, and the voltage superposition on capacitor can be allowed in function
On six bridge arms in rate device, the proof voltage of power device is improved, and when the motor speed of vehicle is less than or equal in advance
If rotary speed threshold value when, counter electromotive force caused by motor is superimposed upon on six bridge arms in power device, does not exceed power
The proof voltage of device, wherein the preset rotary speed threshold value can be measured by developer and be obtained；
In order to avoid the transient current that winding short circuit generates leads to magnetic steel of motor loss of excitation, and then electric machine controller is caused to fail
Even damage, institute in the above way in can not enable active short-circuit protection scheme, just do not enable active short-circuit protection scheme as far as possible；
But when the motor speed of vehicle is greater than preset rotary speed threshold value, if detecting the capacitor in the electric machine controller of vehicle
On voltage be more than preset voltage threshold, at this time motor generate counter electromotive force voltage it is larger, if being superimposed upon power device
In six bridge arms on can be more than power device proof voltage, so active short-circuit protection scheme is enabled, to reduce power
The probability that component failure even damages.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of flow diagram of electric motor short circuit guard method disclosed by the embodiments of the present invention；
Fig. 2 is the flow diagram of another electric motor short circuit guard method disclosed by the embodiments of the present invention；
Fig. 3 is a kind of structural schematic diagram of electric motor short circuit protective device disclosed by the embodiments of the present invention；
Fig. 4 is the structural schematic diagram of another electric motor short circuit protective device disclosed by the embodiments of the present invention；
Fig. 5 is the structural schematic diagram of another electric motor short circuit protective device disclosed by the embodiments of the present invention；
Fig. 6 is the schematic diagram of the power device in a kind of electric machine controller disclosed by the embodiments of the present invention；
Fig. 7 is the schematic diagram how a kind of aid illustration disclosed by the embodiments of the present invention measures preset rotary speed threshold value.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
It should be noted that term " first ", " second " and " third " in description and claims of this specification
Etc. being not use to describe a particular order for distinguishing different objects.The term " includes " of the embodiment of the present invention and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
The embodiment of the invention discloses a kind of electric motor short circuit guard method and devices, can reduce power device or motor
Controller the failure even probability of damage.
Technical solution of the present invention is described in detail below in conjunction with specific embodiment.
Embodiment one
Referring to Fig. 1, Fig. 1 is a kind of flow diagram of electric motor short circuit guard method disclosed by the embodiments of the present invention.Such as
Shown in Fig. 1, which be may comprise steps of:
101, whether the condenser voltage in the electric machine controller of electric motor short circuit protective device detection vehicle is more than preset
Voltage threshold；If being more than, step 102 is executed；If not exceeded, terminating this process.
In the embodiment of the present invention, capacitor be can include but is not limited to: DC_LINK capacitor, i.e. direct current support capacitor,
The one kind for belonging to passive device, high with proof voltage, resistance to electric current is big, Low ESR, low inductance, capacity loss is small, leakage current is small,
Temperature performance is good, charge/discharge speed is fast, long service life (about 100,000 hours), safety anti-explosive and nonpolarity easy for installation etc. excellent
Point.It is widely used in power electronics industry；
Preset voltage threshold can be the voltage value on some capacitor that guarantee electric machine controller does not damage, tool
What body numerical value can be set by developer according to a large amount of experimental result.
102, electric motor short circuit protective device judges whether the motor speed of vehicle is less than or equal to preset rotary speed threshold value；
If；Execute step 103；If it is not, terminating this process.
In the embodiment of the present invention, the measurement method of the motor speed of vehicle be can include but is not limited to: reflection method, magnetoelectricity
Method, raster method or Hall switch detection method；The embodiment of the present invention is illustrated by taking Hall switch detection method as an example, should not be to this
Invention, which is constituted, to be limited.Hall switch detection method: one block of magnet, and the circle in magnet movement track are fixed in motor rotating part
A Hall switch is arranged in all outer rims, and when the motor rotates, Hall switch periodicity induced magnetism line generates pulse voltage, statistics
Pulse voltage quantity in certain time, so that it may converse motor speed.
As an alternative embodiment, electric motor short circuit protective device whether be less than in the motor speed for judging vehicle or
Person is equal to before preset rotary speed threshold value, available vehicle maximum motor speed in the target time period and minimum motor
Revolving speed；And the average value for calculating the maximum motor speed in target time section and minimum motor speed turns as the motor of vehicle
Speed；Wherein, the duration of target time section is less than or equal to preset duration threshold value；
It is set by developer according to a large amount of experimental result it should be noted that the duration of target time section can be
, moreover, preset duration threshold value can small as far as possible (such as one second) so that motor speed is in the selected object time
Closer at the uniform velocity in section, and then it can determine more accurate motor speed.
In practice, it has been found that if only taking the motor speed at some time point as subsequent motor speed judgment criteria
There are contingency；Implement the above method, can be by preferred short time period, the maximum motor speed of vehicle and the smallest
Motor speed, and their average value is calculated as motor speed, available more representative motor speed.
As another optional embodiment, electric motor short circuit protective device is getting vehicle in the target time period
After maximum motor speed and minimum motor speed, electric motor short circuit protective device can also judge the maximum in target time section
Whether the difference of motor speed and minimum motor speed is less than or equal to preset difference threshold, if maximum motor speed
And the difference of minimum motor speed calculates the maximum motor in target time section when being less than or equal to preset difference threshold
Motor speed of the average value of revolving speed and minimum motor speed as vehicle.
It should be noted that preset difference threshold can be and be set according to a large amount of experimental result by developer.
In practice, it has been found that if the difference of the maximum (top) speed of motor and minimum speed is too big (i.e. in the target time period
If more than preset difference threshold), then illustrate that motor speed at this time may mutate, and then calculate motor in the case
Maximum (top) speed in the target time period and the average value of small revolving speed is done as the revolving speed of motor there are contingency, determined
Motor speed is under-represented.Implement the above method, the difference of maximum motor speed and minimum motor speed can be screened out
Greater than the target time section of preset difference threshold, and then it can determine more representative motor speed.
In the embodiment of the present invention, preset rotary speed threshold value can measure to obtain by the following method: allow electric machine controller with
Vehicular electric machine runs (wherein, busbar voltage is set as ceiling voltage) on testboard bay with generating state, controls vehicular electric machine
Initial speed be 100rpm, and by torque setting to maximum, disconnect main relay as shown in Figure 7 (it should be understood that
HV+ in Fig. 7 indicates positive pole；HV- indicates power cathode；IGBT U, IGBT V and IGBT W respectively indicate three insulation
Grid bipolar junction transistor；G1, G2, G3, G4, G5 and G6 respectively indicate six bridges in three IGBT), to allow motor to generate anti-electricity
Kinetic potential acts on the power device in electric machine controller, can pass through the electricity in oscilloscope measurement Fig. 7 between 1,2 two o'clocks at this time
Pressure；Then the revolving speed for controlling vehicular electric machine is gradually increased from low to high with the increment of each 100rpm, in the process by showing
Wave device observes the voltage between 1,2 two o'clocks, if the proof voltage limit of the voltage between 1,2 two o'clocks close to power device is (general pre-
The surplus of 50V or more is stayed, and the proof voltage specific value of power device can be looked into according to the model of power device by internet
Ask), pause increases the revolving speed of motor, and records motor speed at this time as preset rotary speed threshold value.
It should be understood that due to motor under different rotating speeds caused by the voltage of counter electromotive force be different, so
The motor speed when voltage of the counter electromotive force caused by the motor reaches the proof voltage limit of power device can be measured to make
For preset rotary speed threshold value；And then when can guarantee that the revolving speed of motor is less than or equal to preset rotary speed threshold value, produced by motor
Counter electromotive force act on power device will not allow power device failure even damage；In addition, being directed to different vehicular electric machines
The measured rotary speed threshold value come out may be different, such as: when occurring extremely, use the higher vehicular electric machine of counter electromotive force
It may cause the voltage on capacitor and rise faster, amplification is also higher, then passing through the obtained revolving speed of above-mentioned measurement method
Threshold value is also just smaller, so preset rotary speed threshold value, without standard measure, specific value can be by developer according to used
Motor model is obtained by above-mentioned measurement method.
103, the power device in the electric machine controller of electric motor short circuit protective device control vehicle forbids open pipe, and forbids opening
With active short-circuit protection scheme.
In the embodiment of the present invention, active short-circuit protection scheme may include: when in the electric machine controller for detecting vehicle
When voltage on capacitor is more than preset voltage threshold, control three upper bridges in the power device in electric machine controller or
Three lower bridges are opened, and to make machine winding short-circuit, and then allow the counter electromotive force of motor of vehicle in such a way that machine winding is generated heat
It consumes.
Power device may include: insulated gate bipolar transistor (Insulated Gate Bipolar
Transistor, IGBT), the compound full control being made of BJT (double pole triode) and MOS (insulating gate type field effect tube)
Type voltage driven type power semiconductor, has metal-oxide half field effect transistor (Metal-Oxide-Semiconductor concurrently
Field-Effect Transistor, MOSFET) high input impedance and power transistor (Giant Transistor, GTR)
Low conduction voltage drop of both advantage.The embodiment of the present invention is illustrated by taking insulated gate bipolar transistor (IGBT) as an example,
The restriction to this method should not be constituted；
In practice, it has been found that conventional truck is detecting that the voltage on the capacitor in electric machine controller is more than preset electricity
When pressing threshold value, above-mentioned active short-circuit protection scheme can be started automatically.As shown in Figure 6 (it should be understood that the HV+ in Fig. 6 is indicated
Positive pole；HV- indicates power cathode；IGBT U, IGBT V and IGBT W respectively indicate three insulated gate bipolar crystal
Pipe；G1, G2, G3, G4, G5 and G6 respectively indicate six bridges in three IGBT), when starting above-mentioned active short-circuit protection scheme,
Electric machine controller can control three in IGBT upper bridges or three lower bridges are opened and (allow G1, G3 and G5 to open, or allow G2, G4
Opened with G6), to make machine winding short-circuit, and then the counter electromotive force of motor of vehicle is allowed to consume in such a way that machine winding is generated heat
Fall；But it enables active short-circuit protection scheme and may cause machine winding in the transcient short circuit time generation biggish transient current of numerical value
(i.e. a certain numerical values recited and the electric current for generating number), transient current may cause the magnet steel loss of excitation of motor, and then lead to motor
Failure even damages.But implement the embodiment of the present invention, electric motor short circuit protective device can pass through built-in voltage monitoring instrument
Monitor the voltage on the capacitor in electric machine controller, when voltage be more than preset voltage threshold and motor speed be less than it is default
Rotary speed threshold value when, forbid enabling above-mentioned active short-circuit protection scheme, lead to magnetic steel of motor loss of excitation to avoid transient current, reduce
Electric machine controller the failure even probability of damage；
And as shown in 6 figures, above-mentioned active short-circuit protection scheme is enabled, the voltage on capacitor can only be superimposed upon in IGBT
Three upper bridges or three lower bridges on (wherein, open three upper bridges, the voltage on capacitor is just superimposed upon the bridge arm of three lower bridges
On；Three lower bridges are opened, the voltage on capacitor is just superimposed upon on the bridge arm of three upper bridges), the weaker (proof voltage of proof voltage ability
Ability only has half)；And implement the embodiment of the present invention, the voltage of electric motor short circuit protective device on the capacitor is more than preset electricity
Press threshold value, and motor speed be less than preset rotary speed threshold value when, the IGBT that can control in electric machine controller forbids open pipe (to prohibit
Only three Shang Qiao and three lower bridge is opened), to allow the three Shang Qiao and three lower bridges in IGBT of the voltage superposition on capacitor
On bridge arm, there is higher proof voltage, thereby reduce IGBT the failure even probability of damage.
It is preset as an alternative embodiment, electric motor short circuit protective device is less than or equal in the motor speed of vehicle
Rotary speed threshold value when, control the power device in the electric machine controller of vehicle and forbid open pipe, and forbid enable active short-circuit protection
The mode of scheme may is that electric motor short circuit protective device the motor speed of vehicle be zero and be less than preset rotary speed threshold value when,
Power device in control electric machine controller forbids open pipe, and forbids enabling active short-circuit protection scheme.
As another optional embodiment, electric motor short circuit protective device is less than or equal to pre- in the motor speed of vehicle
If rotary speed threshold value when, control the power device in the electric machine controller of vehicle and forbid open pipe, and forbid enable actively short circuit protect
The mode of shield scheme may is that electric motor short circuit protective device is greater than zero in the motor speed of vehicle and is less than or equal to preset turn
When fast threshold value, the state for controlling the power device in electric machine controller switches to pass pipe by open pipe, and forbids enabling actively short circuit
Protection scheme.
In practice, it has been found that when the motor speed of vehicle is greater than zero and is less than or equal to preset rotary speed threshold value, explanation
Vehicle has been started up, and IGBT is to carry out open pipe according to preset frequency or close pipe at this time, if electric motor short circuit protective device passes through
It, can be with when built-in voltage monitoring instrument monitors that the voltage on the capacitor in electric machine controller is more than preset voltage threshold
The state for controlling IGBT switches to pass pipe by open pipe, (is forbidden under three Shang Qiao and three in IGBT with allowing IGBT to be not turned on
Bridge is opened), and then improve the proof voltage ability of power device；And since motor speed at this time is less than or equal to preset revolving speed
Threshold value, so counter electromotive force caused by motor acts on six in power device bridge arms (three Shang Qiao and three lower bridges)
When, the proof voltage of power device is not exceeded, and then can fail to avoid power device and even damage；It is led in addition, forbidding enabling
Dynamic short-circuit protection scheme can lead to magnetic steel of motor loss of excitation to avoid transient current, thereby reduce electric machine controller failure and even damage
Bad probability.
It is preset as an alternative embodiment, electric motor short circuit protective device is greater than in the motor speed for judging vehicle
Rotary speed threshold value, above-mentioned active short-circuit protection scheme can be enabled.
In practice, it has been found that when the motor speed of vehicle is greater than preset threshold speed, the anti-electricity of motor generation at this time
Kinetic potential is larger, if not enabling active short-circuit protection scheme, biggish back-emf voltage may be by the maximum more than power device
Proof voltage even damages if acting on power device and may cause power device failure；So electric motor short circuit protective device
Active short-circuit protection scheme can be enabled, to allow the counter electromotive force of motor to consume by way of machine winding fever, is reduced
Power device the failure even probability of damage.
As an alternative embodiment, electric motor short circuit protective device after enabling active short-circuit protection scheme, is gone back
It may determine that and whether detect transient current in electric machine controller；If detecting transient current, prompt information, the prompt are exported
Information is for prompting user's control vehicle reduction of speed, to allow the motor speed of vehicle to be decreased to less than or be equal to preset rotary speed threshold value；
When the motor speed for detecting vehicle is less than or equal to preset rotary speed threshold value, the power device in electric machine controller is controlled
State is switched by open pipe closes pipe, and deactivates active short-circuit protection scheme.
It should be noted that transient current is pre-set current value and the default electric current for generating number.
In practice, it has been found that enabling active short-circuit protection scheme by machine winding short circuit, winding may be generated random time
The transient current of several, random size, and transient current may cause the magnet steel loss of excitation of motor, even results in motor failure and even damages
It is bad.Implement the above method, electric motor short circuit protective device can export prompt information and remind user's control vehicle deceleration, to allow motor
Revolving speed drops to preset rotary speed threshold value or less；Since revolving speed declines, the counter electromotive force that motor generates also just declines, even and if then stopping
With active short-circuit protection scheme, lesser counter electromotive force acts on power device the proof voltage for being not more than power device,
And active short-circuit protection scheme is deactivated, it can fail to avoid electric machine controller, and then can protect vehicle safety.
As it can be seen that implementing method described in Fig. 1, electric motor short circuit protective device can be in the electric machine controller for detecting vehicle
In capacitor on voltage when being more than preset voltage threshold, the tach signal by analyzing motor is used with distinguishing vehicle
Different operating conditions, and then corresponding safeguard measure can be taken according to the different revolving speed of motor, actively short circuit is enabled to avoid blindness
Protection scheme, and then cause power device or electric machine controller to fail even and damage.
Embodiment two
Referring to Fig. 2, Fig. 2 is the flow diagram of another electric motor short circuit guard method disclosed by the embodiments of the present invention.
As shown in Fig. 2, the electric motor short circuit guard method may comprise steps of:
It should be understood that 201~step 203 of following steps can independently be implemented in the embodiment of the present invention, one is constituted
Independent electric motor short circuit guard method, for carrying out short-circuit protection to vehicular electric machine in the operating condition that vehicle charges；Separately
Outside, 201~step 203 of following steps can also cooperate a kind of electric motor short circuit guard method implementation disclosed in embodiment one, with structure
At one under various working, the scheme of short-circuit protection is carried out to vehicular electric machine；The embodiment of the present invention is not construed as limiting.
201, electric motor short circuit protective device is detecting vehicle when being charged, judge master in the battery pack of vehicle after
Whether electric appliance disconnects；If disconnecting, step 202 is executed；If not disconnecting, terminate this process.
202, electric motor short circuit protective device judges that the main relay in battery pack is disconnected and filled to what vehicle charged
The moment that motor does not disconnect, the electric energy that charger is transmitted to vehicle whether allow vehicle electric machine controller in capacitor on electricity
Pressure is increased over preset voltage threshold；If being more than, step 203 is executed；If not exceeded, terminating this process.
In the embodiment of the present invention, the main relay in battery pack is disconnected but is not disconnected to the charger that vehicle charges
Moment, charger is the main reason for the electric energy of the instantaneous transmission to vehicle, which is, causes voltage on capacitor to rise, i.e., simultaneously
It is no longer as caused by the counter electromotive force generated when electric motor starting；So may determine that charger instantaneous transmission electric energy whether
The voltage on capacitor allowed in the electric machine controller of vehicle is increased over preset voltage threshold, after judging whether execution
Continuous safeguard measure.
It should be further noted that the case where Vehicular charging abnormal (such as overcurrent), can be divided into following two situation: (1)
Since battery management system (Battery Management System, BMS) controls exception, cause to be initially switched off whole vehicle
Main relay then cuts off the relay of the charger to charge to vehicle, may cause in the electric machine controller of vehicle
The case where voltage on capacitor is increased over preset voltage threshold；(2) battery management system (Battery
Management System, BMS) it controls normally, it has been initially switched off the relay of the charger to charge to vehicle, it is rear to cut off
The main relay of whole vehicle.But if the relay of charger is since adhesion is without cutting, the master of subsequent vehicle vehicle
Relay be cut off again (i.e. the relay of charger be not cut off in the case where cut off vehicle main relay, i.e., again become
The first situation, has been initially switched off the main relay of whole vehicle, the rear relay for cutting off charger), then may also lead to
The case where voltage on capacitor in the electric machine controller of vehicle is increased over preset voltage threshold.
203, the power device in electric motor short circuit protective device control electric machine controller forbids open pipe, and forbids enabling actively
Short-circuit protection scheme.
In the embodiment of the present invention, the power device in electric motor short circuit protective device control electric machine controller forbids open pipe (i.e.
Three Shang Qiao and three in IGBT lower bridge is forbidden to open), similarly with the step 103 in embodiment one, power device can be improved
The proof voltage ability of part, and since the electric energy of charger instantaneous transmission is smaller, so the voltage generated is also smaller, lesser electricity
Pressure acts on power device the proof voltage ability for being not more than power device, and then power device failure is avoided even to damage
It is bad；In addition, forbidding enabling active short-circuit protection scheme, magnetic steel of motor loss of excitation can be caused to avoid transient current, is thereby reduced
Electric machine controller the failure even probability of damage.
As it can be seen that implementing method described in Fig. 2 with implementing compared with method described in Fig. 1, can also being filled in vehicle
Electricity breaks down when the main relay of battery pack being caused to disconnect, and controls the power device in electric machine controller and forbids open pipe, and prohibits
Active short-circuit protection scheme is only enabled, is even damaged to avoid the power device failure in electric machine controller or electric machine controller
It is bad.
Embodiment three
Referring to Fig. 3, Fig. 3 is a kind of structural schematic diagram of electric motor short circuit protective device disclosed by the embodiments of the present invention.Such as
Shown in Fig. 3, which may include:
First detection unit 301, whether the condenser voltage in electric machine controller for detecting vehicle is more than preset
Voltage threshold；
First judging unit 302, for the capacitor in the electric machine controller that first detection unit 301 detects vehicle
When voltage is more than preset voltage threshold, judge whether the motor speed of vehicle is less than or equal to preset rotary speed threshold value；
First control unit 303, for judging that it is pre- that the motor speed of vehicle is less than or equal in the first judging unit 302
If rotary speed threshold value when, control electric machine controller in power device forbid open pipe, and forbid enable active short-circuit protection scheme.
As it can be seen that electric motor short circuit protective device described in implementing Fig. 3, electric motor short circuit protective device can detect vehicle
Electric machine controller in capacitor on voltage be more than preset voltage threshold when, by analyze motor tach signal with area
The different operating conditions that separating vehicles use, and then corresponding safeguard measure can be taken according to the different revolving speed of motor, to avoid blindly
Active short-circuit protection scheme is enabled, and then cause power device or electric machine controller to fail even to damage.
Example IV
Referring to Fig. 4, Fig. 4 is the structural schematic diagram of another electric motor short circuit protective device disclosed by the embodiments of the present invention.
Wherein, electric motor short circuit protective device shown in Fig. 4 is that electric motor short circuit protective device as shown in Figure 3 optimizes.With
Electric motor short circuit protective device shown in Fig. 3 compares, and electric motor short circuit protective device shown in Fig. 4 can also include:
Unit 304 is enabled, for judging that the motor speed of vehicle is greater than preset revolving speed threshold in the first judging unit 302
Value enables active short-circuit protection scheme.
Implement the above method, it can be by enabling active short-circuit protection scheme, to allow the counter electromotive force of motor to pass through motor
The mode of heating in winding consumes, and reduces power device the failure even probability of damage.
As an alternative embodiment, electric motor short circuit protective device shown in Fig. 4 can also include:
Second judgment unit 305, for detecting vehicle when being charged, judge master in the battery pack of vehicle after
Whether electric appliance disconnects；
Third judging unit 306, it is disconnected for the main relay in the battery pack that second judgment unit 305 judges vehicle
When opening, judge that charger is transmitted to vehicle in main relay disconnection and to the moment that the charger that vehicle charges does not disconnect
Electric energy whether allow vehicle electric machine controller in capacitor on voltage be increased over preset voltage threshold；
Second control unit 307, for judging that charger is transmitted to the electric energy of vehicle by vehicle in third judging unit 306
Electric machine controller in capacitor on voltage when being increased over preset voltage threshold, control in electric machine controller
Power device forbids open pipe, and forbids enabling active short-circuit protection scheme.
Implement the above method, can be in vehicle when charging, which is broken down, causes the main relay of battery pack to disconnect, control
Power device in electric machine controller forbids open pipe, and forbids enabling active short-circuit protection scheme, to avoid electric machine controller or
Power device failure in person's electric machine controller even damages.
As an alternative embodiment, electric motor short circuit protective device shown in Fig. 4 can also include:
4th judging unit 308, for judging in motor after enabling unit 304 and enabling active short-circuit protection scheme
Whether transient current is detected in controller, which is pre-set current value and the default electric current for generating number；
Output unit 309, for exporting prompt information, the prompt when the 4th judging unit 308 detects transient current
Information is for prompting user's control vehicle reduction of speed, to allow the motor speed of vehicle to be decreased to less than or be equal to preset rotary speed threshold value；
Third control unit 310, for the motor speed for detecting vehicle be less than or equal to preset rotary speed threshold value when,
The state for controlling the power device in electric machine controller is switched by open pipe closes pipe, and deactivates active short-circuit protection scheme.
Implement the above method, electric motor short circuit protective device can export prompt information and remind user's control vehicle deceleration, with
Motor speed is allowed to drop to preset rotary speed threshold value or less；Since revolving speed declines, the counter electromotive force that motor generates also just declines, in turn
Even if deactivating active short-circuit protection scheme, lesser counter electromotive force, which acts on power device, is not more than the resistance to of power device
Voltage, and active short-circuit protection scheme is deactivated, it can fail to avoid electric machine controller, and then can protect vehicle safety.
As another optional embodiment, electric motor short circuit protective device shown in Fig. 4 can also include:
Acquiring unit 311, for judging it is pre- whether the motor speed of vehicle is less than or equal in the first judging unit 302
If rotary speed threshold value before, obtain vehicle maximum motor speed in the target time period and minimum motor speed；Wherein, mesh
The duration for marking the period is less than or equal to preset duration threshold value；
Computing unit 312, for calculating being averaged for maximum motor speed in target time section and minimum motor speed
It is worth the motor speed as vehicle.
Implement the above method, can be by preferred short time period, the maximum motor speed and the smallest electricity of vehicle
Machine revolving speed, and their average value is calculated as motor speed, available more representative motor speed.
As another optional embodiment, electric motor short circuit protective device shown in Fig. 4 can also include:
5th judging unit 313, for obtaining the maximum motor speed of vehicle in the target time period in acquiring unit 311
And after minimum motor speed, it is pre- to judge whether the difference of maximum motor speed and minimum motor speed is less than or equal to
If difference threshold；
And computing unit 312, specifically for judging maximum motor speed and minimum in the 5th judging unit 313
The difference of motor speed be less than or equal to preset difference threshold when, calculate target time section in maximum motor speed and
Motor speed of the average value of minimum motor speed as vehicle.
Implement the above method, the difference that can screen out maximum motor speed and minimum motor speed is greater than preset difference
It is worth the target time section of threshold value, and then can determines more representative motor speed.
As another optional embodiment, first control unit 303 in the first judging unit 302 for judging
When the motor speed of vehicle is less than or equal to preset rotary speed threshold value, the power device controlled in electric machine controller forbids open pipe,
And forbid enabling the mode of active short-circuit protection scheme specifically:
First control unit 303, for judging that the motor speed of vehicle is zero and is less than pre- in the first judging unit 302
If rotary speed threshold value when, control electric machine controller in power device forbid open pipe, and forbid enable active short-circuit protection scheme；
Alternatively, being preset for judging that the motor speed of vehicle is greater than zero and is less than or equal in the first judging unit 302
Rotary speed threshold value when, control electric machine controller in power device state by open pipe switch to pass pipe, and forbid enable actively
Short-circuit protection scheme.
Implement the above method, can fail to avoid power device and even damage；In addition, forbidding enabling active short-circuit protection side
Case can lead to magnetic steel of motor loss of excitation to avoid transient current, thereby reduce electric machine controller the failure even probability of damage.
As it can be seen that with implementing Fig. 3 described in compared with electric motor short circuit protective device, implement electric motor short circuit described in Fig. 4
Protective device can also control electric machine controller in vehicle when charging, which is broken down, causes the main relay of battery pack to disconnect
In power device forbid open pipe, and forbid enable active short-circuit protection scheme, to avoid electric machine controller or motor control
Power device failure in device even damages；And can by preferred short time period, the maximum motor speed of vehicle with
And the smallest motor speed, and their average value is calculated as motor speed, available more representative motor speed；
And it can fail to avoid power device and even damage；In addition, forbidding enabling active short-circuit protection scheme can be to avoid transient state electricity
Conductance causes magnetic steel of motor loss of excitation, thereby reduces electric machine controller the failure even probability of damage.
Embodiment five
Referring to Fig. 5, Fig. 5 is the structural schematic diagram of another electric motor short circuit protective device disclosed by the embodiments of the present invention.
As shown in figure 5, the electric motor short circuit protective device may include:
It is stored with the memory 501 of executable program code；
The processor 502 coupled with memory 501；
Wherein, processor 502 calls the executable program code stored in memory 501, and it is any one to execute FIG. 1 to FIG. 2
Kind electric motor short circuit guard method.
The embodiment of the present invention discloses a kind of computer readable storage medium, stores computer program, wherein the computer
Program makes computer execute any one electric motor short circuit guard method of FIG. 1 to FIG. 2.
The embodiment of the present invention is also disclosed a kind of using distribution platform, wherein using distribution platform for issuing computer journey
Sequence product, wherein when computer program product is run on computers, so that computer executes such as the above each method embodiment
In some or all of method step.
In various embodiments of the present invention, it should be appreciated that magnitude of the sequence numbers of the above procedures are not meant to execute suitable
Successively, the execution sequence of each process should be determined by its function and internal logic the certainty of sequence, without coping with the embodiment of the present invention
Implementation process constitutes any restriction.
Above-mentioned unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be object unit, can be in one place, or may be distributed over multiple networks
On unit.Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can integrate in one processing unit, it is also possible to
Each unit physically exists alone, and can also be integrated in one unit with two or more units.Above-mentioned integrated unit
Both it can take the form of hardware realization, can also realize in the form of software functional units.
If above-mentioned integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product,
It can store in a retrievable memory of computer.Based on this understanding, technical solution of the present invention substantially or
Person says all or part of of the part that contributes to existing technology or the technical solution, can be in the form of software products
It embodies, which is stored in a memory, including several requests are with so that a computer is set
Standby (can be personal computer, server or network equipment etc., specifically can be the processor in computer equipment) executes
Some or all of each embodiment above method of the invention step.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium include read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read-only memory (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read-only memory
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), CD-ROM
(Compact Disc Read-Only Memory, CD-ROM) or other disc memories, magnetic disk storage, magnetic tape storage,
Or it can be used in any other computer-readable medium of carrying or storing data.
A kind of electric motor short circuit guard method disclosed by the embodiments of the present invention and device are described in detail above, herein
In apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to sides
Assistant solves method and its core concept of the invention；At the same time, for those skilled in the art, think of according to the present invention
Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair
Restriction of the invention.
Claims (14)
1. a kind of electric motor short circuit guard method, which is characterized in that the described method includes:
Whether the condenser voltage detected in the electric machine controller of vehicle is more than preset voltage threshold；If being more than, described in judgement
Whether the motor speed of vehicle is less than or equal to preset rotary speed threshold value；
If the motor speed of the vehicle is less than or equal to the preset rotary speed threshold value, the function in the electric machine controller is controlled
Rate device forbids open pipe, and forbids enabling active short-circuit protection scheme.
2. the method according to claim 1, wherein the motor speed in the vehicle is less than or equal to institute
It when stating preset rotary speed threshold value, controls the power device in the electric machine controller and forbids open pipe, and forbid enabling actively short circuit
Protection scheme, comprising:
When the motor speed of the vehicle is zero and is less than the preset rotary speed threshold value, control in the electric machine controller
Power device forbids open pipe, and forbids enabling active short-circuit protection scheme；
Alternatively, controlling the motor when the motor speed of the vehicle is greater than zero and is less than or equal to preset rotary speed threshold value
The state of power device in controller switches to pass pipe by open pipe, and forbids enabling active short-circuit protection scheme.
3. the method according to claim 1, wherein the method also includes:
If the motor speed of the vehicle is greater than the preset rotary speed threshold value, the active short-circuit protection scheme is enabled.
4. according to the method described in claim 3, it is characterized in that, it is described enable the active short-circuit protection scheme after,
The method also includes:
Judge transient current whether is detected in the electric machine controller, the transient current is pre-set current value and default production
The electric current of raw number；
If detecting the transient current, prompt information is exported, the prompt information is for prompting vehicle described in user's control to drop
Speed, to allow the motor speed of the vehicle to be decreased to less than or be equal to the preset rotary speed threshold value；
When the motor speed for detecting the vehicle is less than or equal to the preset rotary speed threshold value, the motor control is controlled
The state of power device in device is switched by open pipe closes pipe, and deactivates the active short-circuit protection scheme.
5. method according to any one of claims 1 to 4, which is characterized in that turn in the motor of the judgement vehicle
Whether speed is less than or equal to before preset rotary speed threshold value, the method also includes:
Obtain vehicle maximum motor speed in the target time period and minimum motor speed；Wherein, when the target
Between section duration be less than or equal to preset duration threshold value；
The average value of the maximum motor speed and minimum motor speed in the target time section is calculated as the vehicle
Motor speed.
6. according to the method described in claim 5, it is characterized in that, obtaining the vehicle in the target time period most described
After big motor speed and minimum motor speed, the method also includes:
Judge whether the maximum motor speed and the difference of the minimum motor speed are less than or equal to preset difference
Threshold value；
If the maximum motor speed and the difference of the minimum motor speed are less than or equal to preset difference threshold, hold
The average value of the row maximum motor speed calculated in the target time section and minimum motor speed is as the vehicle
Motor speed the step of.
7. a kind of electric motor short circuit guard method, which is characterized in that the described method includes:
When detecting vehicle when being charged, judge whether the main relay in the battery pack of the vehicle disconnects；
If the main relay disconnects, judge to disconnect in the main relay and do not break to the charger that the vehicle charges
The moment opened, the electric energy that the charger is transmitted to the vehicle whether allow the vehicle electric machine controller in capacitor on
Voltage be increased over preset voltage threshold；
If being more than, control the power device in the electric machine controller and forbid open pipe, and forbids enabling active short-circuit protection scheme.
8. a kind of electric motor short circuit protective device, which is characterized in that described device includes:
First detection unit, whether the condenser voltage in electric machine controller for detecting vehicle is more than preset voltage threshold
Value；
First judging unit is super for the condenser voltage in the electric machine controller that the first detection unit detects vehicle
When crossing preset voltage threshold, judge whether the motor speed of the vehicle is less than or equal to preset rotary speed threshold value；
First control unit, for judging that it is described that the motor speed of the vehicle is less than or equal in first judging unit
It when preset rotary speed threshold value, controls the power device in the electric machine controller and forbids open pipe, and forbid enabling actively short circuit and protect
Shield scheme.
9. device according to claim 8, which is characterized in that the first control unit is used for single in first judgement
When member judges that the motor speed of the vehicle is less than or equal to the preset rotary speed threshold value, control in the electric machine controller
Power device forbid open pipe, and forbid enable active short-circuit protection scheme mode specifically:
First control unit, for judging that the motor speed of the vehicle is zero and is less than described in first judging unit
It when preset rotary speed threshold value, controls the power device in the electric machine controller and forbids open pipe, and forbid enabling actively short circuit and protect
Shield scheme；
Alternatively, being preset for judging that the motor speed of the vehicle is greater than zero and is less than or equal in first judging unit
Rotary speed threshold value when, control the state of the power device in the electric machine controller by open pipe and switch to pass pipe, and forbid enabling
Active short-circuit protection scheme.
10. device according to claim 8, which is characterized in that described device further include:
Unit is enabled, for judging that the motor speed of the vehicle is greater than the preset revolving speed in first judging unit
Threshold value enables the active short-circuit protection scheme.
11. device according to claim 10, which is characterized in that described device further include:
Second judgment unit, for judging in the electricity after the enabling unit enables the active short-circuit protection scheme
Whether detect that transient current, the transient current are pre-set current value and the default electric current for generating number in machine controller；
Output unit, for exporting prompt information, the prompt when the second judgment unit detects the transient current
Information is described default to allow the motor speed of the vehicle to be decreased to less than or be equal to for prompting vehicle reduction of speed described in user's control
Rotary speed threshold value；
Second control unit, for being less than or equal to the preset rotary speed threshold value in the motor speed for detecting the vehicle
When, the state for controlling the power device in the electric machine controller is switched by open pipe closes pipe, and deactivates the active short-circuit protection
Scheme.
12. according to the described in any item devices of claim 8~11, which is characterized in that described device further include:
Acquiring unit, for judging it is default whether the motor speed of the vehicle is less than or equal in first judging unit
Rotary speed threshold value before, obtain vehicle maximum motor speed in the target time period and minimum motor speed；Wherein,
The duration of the target time section is less than or equal to preset duration threshold value；
Computing unit, the average value for calculating maximum motor speed and minimum motor speed in the target time section are made
For the motor speed of the vehicle.
13. device according to claim 12, which is characterized in that described device further include:
Third judging unit, for the acquiring unit obtain the maximum motor speed of the vehicle in the target time period with
And after minimum motor speed, judge the difference of the maximum motor speed and the minimum motor speed whether be less than or
Equal to preset difference threshold；
And the computing unit, specifically for judging the maximum motor speed and institute in the third judging unit
When stating the difference of minimum motor speed less than or equal to preset difference threshold, the maximum electricity in the target time section is calculated
Motor speed of the average value of machine revolving speed and minimum motor speed as the vehicle.
14. a kind of electric motor short circuit protective device, which is characterized in that described device includes:
First judging unit judges the main relay in the battery pack of the vehicle for detecting vehicle when being charged
Whether device disconnects；
Second judgment unit is disconnected for the main relay in the battery pack that first judging unit judges the vehicle
When, judge in the moment that the main relay disconnects and the charger that charges to the vehicle does not disconnect, the charger
Be transmitted to the vehicle electric energy whether allow the vehicle electric machine controller in capacitor on voltage be increased over it is pre-
If voltage threshold；
Control unit, for the second judgment unit judge the charger be transmitted to the vehicle electric energy allow it is described
When the voltage on capacitor in the electric machine controller of vehicle is increased over the preset voltage threshold, the motor is controlled
Power device in controller forbids open pipe, and forbids enabling active short-circuit protection scheme.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769781A (en) * | 2020-06-29 | 2020-10-13 | 珠海格力电器股份有限公司 | Motor fault shutdown method, storage medium, fault protection module and control system |
| 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 |
| CN112572151A (en) * | 2020-10-30 | 2021-03-30 | 深圳市禾望电气股份有限公司 | Active short-circuit protection method and controller for motor and motor control system |
| CN112615353A (en) * | 2020-12-04 | 2021-04-06 | 珠海格力电器股份有限公司 | Overvoltage protection method and device, electronic equipment and storage medium |
| CN113787913A (en) * | 2021-10-08 | 2021-12-14 | 深圳市法拉第电驱动有限公司 | Fault response method and system for new energy automobile main drive controller |
| CN113809719A (en) * | 2021-09-26 | 2021-12-17 | 东风商用车有限公司 | Monitoring and protecting method for high-voltage disconnection in power generation process of permanent magnet motor |
| WO2023236362A1 (en) * | 2022-06-08 | 2023-12-14 | 一巨自动化装备（上海）有限公司 | Control method and apparatus for driving active short circuit for electric vehicle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528445A (en) * | 1994-09-23 | 1996-06-18 | General Electric Company | Automatic fault current protection for a locomotive propulsion system |
| US20040207351A1 (en) * | 2003-04-17 | 2004-10-21 | Dietmar Hahn | Braking device for an electric motor, electrical apparatus provided with the braking device, and a method of braking |
| CN101796719A (en) * | 2007-07-07 | 2010-08-04 | Trw有限公司 | Electric motor control |
| CN104410337A (en) * | 2014-11-26 | 2015-03-11 | 联合汽车电子有限公司 | Driving system of high-voltage permanent magnet synchronous motor |
| CN105634352A (en) * | 2014-11-07 | 2016-06-01 | 湖南南车时代电动汽车股份有限公司 | Generator controller overvoltage protection method and system |
| CN106104998A (en) * | 2014-03-31 | 2016-11-09 | 爱信艾达株式会社 | Control device for inverter |
| CN107148745A (en) * | 2014-12-25 | 2017-09-08 | 爱信艾达株式会社 | Rotary electric machine controller |
| CN108809156A (en) * | 2018-06-28 | 2018-11-13 | 同济大学 | A kind of method, storage medium and equipment for controlling motor |
| CN108944571A (en) * | 2018-07-04 | 2018-12-07 | 北京新能源汽车股份有限公司 | Method of controlling security, system and the vehicle of vehicle-mounted motor |
-
2019
- 2019-04-10 CN CN201910283675.4A patent/CN110011278B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528445A (en) * | 1994-09-23 | 1996-06-18 | General Electric Company | Automatic fault current protection for a locomotive propulsion system |
| US20040207351A1 (en) * | 2003-04-17 | 2004-10-21 | Dietmar Hahn | Braking device for an electric motor, electrical apparatus provided with the braking device, and a method of braking |
| CN101796719A (en) * | 2007-07-07 | 2010-08-04 | Trw有限公司 | Electric motor control |
| CN106104998A (en) * | 2014-03-31 | 2016-11-09 | 爱信艾达株式会社 | Control device for inverter |
| CN105634352A (en) * | 2014-11-07 | 2016-06-01 | 湖南南车时代电动汽车股份有限公司 | Generator controller overvoltage protection method and system |
| CN104410337A (en) * | 2014-11-26 | 2015-03-11 | 联合汽车电子有限公司 | Driving system of high-voltage permanent magnet synchronous motor |
| CN107148745A (en) * | 2014-12-25 | 2017-09-08 | 爱信艾达株式会社 | Rotary electric machine controller |
| CN108809156A (en) * | 2018-06-28 | 2018-11-13 | 同济大学 | A kind of method, storage medium and equipment for controlling motor |
| CN108944571A (en) * | 2018-07-04 | 2018-12-07 | 北京新能源汽车股份有限公司 | Method of controlling security, system and the vehicle of vehicle-mounted motor |
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