CN208874274U - Inverter power-off protection circuit and vehicle - Google Patents
Inverter power-off protection circuit and vehicle Download PDFInfo
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- CN208874274U CN208874274U CN201821620286.3U CN201821620286U CN208874274U CN 208874274 U CN208874274 U CN 208874274U CN 201821620286 U CN201821620286 U CN 201821620286U CN 208874274 U CN208874274 U CN 208874274U
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Abstract
The utility model discloses an inverter power-off protection circuit and vehicle, wherein, inverter power-off protection circuit includes detection circuitry, controller and the power supply who connects gradually, switching circuit, filter circuit, inverter and motor, wherein, detection circuitry links to each other with switching circuit, filter circuit and inverter respectively for detect direct current busbar voltage, and/or, first busbar current and second busbar current, wherein, first busbar current is the current that flows through the direct current generating line between filter circuit and the switching circuit, second busbar current is the current that flows through the direct current generating line between filter circuit and the inverter; the controller is respectively connected with the detection circuit and the inverter and used for judging whether the switching circuit is disconnected or not according to the direct current bus voltage and/or the first bus current and the second bus current and performing zero vector shutdown protection on the motor through the inverter when the switching circuit is judged to be disconnected, so that damage to power devices in the inverter is avoided.
Description
Technical field
The utility model relates to technical field of motors, in particular to a kind of inverter power-off protecting circuit and a kind of vehicle.
Background technique
In automotive field, more and more automobiles carry out drive control using permanent magnet synchronous motor, but due to Permanent Magnet and Electric
The presence of machine permanent magnet has the process of a reverse power generation in physics shutdown transient, the voltage that this power generation process issues
Size depends on the size of capacitor's capacity in electric machine control system.If capacitor's capacity is smaller, it is excessively high to may cause transient voltage,
And then it will cause the damage of power device.
Since thin-film capacitor life cycle is long, tolerance ripple current ability is strong, more and more adopts in electric machine control system
With thin-film capacitor, and non-electrolytic capacitor.But the capacitance of same volume electrolytic capacitor is 3-4 times of thin-film capacitor, due to film
Capacitor's capacity is smaller, so being more prone to produce high voltage in reverse power generation process.The generation for how containing this phenomenon, becomes urgently
Problem to be solved.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
Be to propose a kind of inverter power-off protecting circuit with a novel purpose, can accurate judgement whether motor operate shape
By forced interruption under state, and zero vector stoppage protection can be carried out to motor by inverter, as a result, when by forced interruption
Avoid the damage of power device in inverter.
In order to achieve the above objectives, the utility model first aspect proposes a kind of inverter power-off protecting circuit, including supplies
Power supply, switching circuit, filter circuit, inverter, motor, detection circuit and controller, the power supply, switch electricity
Road, the filter circuit, the inverter and the motor are sequentially connected, wherein the detection circuit respectively with the switch
Circuit, the filter circuit are connected with the inverter, for detecting DC bus-bar voltage, and/or, the first bus current and
Two bus currents, wherein first bus current is the direct current mother flowed through between the filter circuit and the switching circuit
The electric current of line, second bus current are the electric current for flowing through the DC bus between the filter circuit and the inverter；
The controller is connected with the detection circuit and the inverter respectively, and the controller is used for according to the DC bus electricity
Pressure, and/or, first bus current and second bus current judge whether the switching circuit disconnects, and are judging
When the switching circuit disconnects, zero vector stoppage protection is carried out to the motor by the inverter.
The inverter power-off protecting circuit of the utility model embodiment, can accurate judgement whether under machine operating condition
By forced interruption, and zero vector stoppage protection can be carried out to motor by inverter, avoided as a result, when by forced interruption
The damage of power device in inverter.
In addition, can also have following additional technology special according to the above-mentioned inverter power-off protecting circuit of the utility model
Sign:
In some instances, the switching circuit includes power relay, and the power relay includes the first relay
Be connected with one end of the second relay, first relay with the anode of the power supply, first relay it is another
One end is connected with the filter circuit, and one end of second relay is connected with the cathode of the power supply, and described second
The other end of relay is connected with the filter circuit.
In some instances, the filter circuit includes filter capacitor, one end of the filter capacitor with described first after
The other end of electric appliance is connected, and the other end of the filter capacitor is connected with the other end of second relay.
In some instances, the inverter includes the first power tube, the second power tube, third power tube, the 4th power
Pipe, the 5th power tube and the 6th power tube, wherein the collector of the collector of first power tube, the third power tube
It is connected with the anode of DC bus with the collector of the 5th power tube, and forms first node；Second power tube
Emitter, the emitter of the 4th power tube and cathode of the emitter with the DC bus of the 6th power tube
It is connected, and forms second node；The emitter of first power tube is connected with the collector of second power tube, and is formed
Third node, the emitter of the third power tube is connected with the collector of the 4th power tube, and forms fourth node, institute
The emitter for stating the 5th power tube is connected with the collector of the 6th power tube, and forms the 5th node, wherein the third
Node, the fourth node and the 5th node are connected with the motor；The base stage of first power tube, described second
The base stage of power tube, the base stage of the third power tube, the base stage of the 4th power tube, the base stage of the 5th power tube and
The base stage of 6th power tube is connected with the controller.
In some instances, the detection circuit, comprising: voltage sample resistance, the voltage sample resistance and the filter
Wave capacitor is connected in parallel；Wherein, the controller is connected with the voltage sample resistance, and the controller is used in the direct current
Busbar voltage is less than voltage threshold, and the controller still output pwm signal when, judge that the power relay disconnects, and lead to
It crosses the inverter and zero vector stoppage protection is carried out to the motor.
In some instances, the detection circuit includes: the first current sensing device and the second current sensing device,
In, first current sensing device is connected between the other end of first relay and one end of the filter capacitor,
The second electric current electrical measurement device is connected between one end of the filter capacitor and the first node；Or first electricity
Current sensor part is connected between the other end of second relay and the other end of the filter capacitor, second electric current
Electrical measurement device is connected between the other end of the filter capacitor and the second node；Wherein, the controller respectively with institute
It states the first current sensing device to be connected with second current sensing device, the controller is used for: according to first bus
Electric current and second bus current calculate the capacitance current for flowing through the filter capacitor, and judge according to the capacitance current
When the discharge time of the filter capacitor is greater than PWM cycle, judge that the power relay disconnects, and pass through the inverter pair
The motor carries out zero vector stoppage protection, and according to first bus current and second bus current calculating
The phase current of motor, and be 0 in first bus current, and when the phase current of the motor is not 0, judge the power after
Electric appliance disconnects, and carries out zero vector stoppage protection to the motor by the inverter.
In some instances, the first current sensing device and second current sensing device are all made of current Hall element
Or current sampling resistor.
In some instances, described that zero vector stoppage protection is carried out to the motor by the inverter, comprising: control
First power tube, the third power tube and the 5th power tube are open-minded simultaneously, and control second power tube, institute
It states the 4th power tube and the 6th power tube simultaneously turns off；Alternatively, control first power tube, the third power tube and
5th power tube simultaneously turns off, and it is same to control second power tube, the 4th power tube and the 6th power tube
Shi Kaitong.
In order to achieve the above objectives, the utility model second aspect proposes a kind of vehicle, powers off including above-mentioned inverter
Protect circuit.
The vehicle of the utility model, using above-mentioned inverter power-off protecting circuit, can accurate judgement whether in motor
By forced interruption under operating condition, and zero vector stoppage protection can be carried out to motor by inverter when by forced interruption,
The damage of power device in inverter is avoided as a result,.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
Fig. 1 is the structural block diagram according to the inverter power-off protecting circuit of the utility model embodiment；
Fig. 2 is the structural schematic diagram according to the inverter power-off protecting circuit of the utility model one embodiment；
Fig. 3 is the structural schematic diagram according to the inverter power-off protecting circuit of the utility model another embodiment；
Fig. 4 is the structural schematic diagram according to the inverter power-off protecting circuit of the utility model another embodiment；
Fig. 5 is the fluctuation of an exemplary DC bus-bar voltage, the phase current of motor, capacitance current and the first bus current
Curve graph；
Fig. 6 is the corresponding relationship of an exemplary DC bus-bar voltage, capacitance current and pwm signal；
Fig. 7, Fig. 8 are DC bus-bar voltage, the phase current of motor, capacitance current and the first bus current before and after motor stopping
Curve of cyclical fluctuations figure；
Fig. 9 is the structural block diagram of vehicle according to an embodiment of the present invention.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
Below with reference to the accompanying drawings the inverter power-off protecting circuit and vehicle of the utility model embodiment are described.
Fig. 1 is the structural block diagram according to the inverter power-off protecting circuit of the utility model embodiment.
As shown in Figure 1, the inverter power-off protecting circuit 100 includes power supply 110, switching circuit 120, filter circuit
130, inverter 140, motor M, detection circuit 150 and controller 160.Wherein, motor M uses permanent magnet synchronous motor.
Referring to Fig. 1, power supply circuit 110, switching circuit 120, filter circuit 130, inverter 140 and motor M are sequentially connected.
Detection circuit 150 is connected with switching circuit 120, filter circuit 130 and inverter 140 respectively, for detecting DC bus-bar voltage,
And/or first bus current and the second bus current, wherein the first bus current is to flow through filter circuit 130 and switching circuit
The electric current of DC bus between 120, the second bus current are the direct current mother flowed through between filter circuit 130 and inverter 140
The electric current of line.Controller 160 is connected with detection circuit 150 and inverter 140 respectively, and controller 160 is used for according to DC bus
Voltage, and/or, the first bus current and the second bus current judge whether switching circuit 120 disconnects, and in judgement switch electricity
When road 120 disconnects, zero vector stoppage protection is carried out to motor M by inverter 140.
The protection circuit detects DC bus-bar voltage by detection device as a result, and/or, the first bus current and second
Bus current, and then the DC bus-bar voltage obtained by controller according to detection, and/or, the first bus current and the second mother
Line current judges whether motor normal operating conditions lower switch circuit is disconnected by force, and is judging that switching circuit is broken by force
When opening, zero vector stoppage protection is carried out to motor by inverter, so as to avoid the damage of power device in inverter.
In one embodiment of the utility model, as shown in figs 2-4, switching circuit 120 includes power relay RY,
Power relay RY includes one end and the power supply 110 of the first relay KM1 and the second relay KM2, the first relay KM1
Anode be connected, the other end of the first relay KM1 is connected with filter circuit 130, one end of the second relay KM2 with power it is electric
The cathode in source 110 is connected, and the other end of the second relay KM2 is connected with filter circuit 130.
Further ,-Fig. 4 referring to fig. 2, filter circuit 130 include filter capacitor E, one end of filter capacitor E with first after
The other end of electric appliance KM1 is connected, and the other end of filter capacitor E is connected with the other end of the second relay KM2.Wherein, filtered electrical
Hold E and uses thin-film capacitor.
- Fig. 4 referring to fig. 2, inverter 140 include the first power tube G1, the second power tube G2, third power tube G3, the 4th
Power tube G4, the 5th power tube G5 and the 6th power tube G6.Wherein, the collector of the first power tube G1, third power tube G3
The collector of collector and the 5th power tube G5 are connected with the anode of DC bus, and form first node a1；Second power
The emitter of the emitter of pipe G2, the emitter of the 4th power tube G4 and the 6th power tube G6 with the cathode phase of DC bus
Even, and second node a2 is formed；The emitter of first power tube G1 is connected with the collector of the second power tube G2, and forms third
The emitter of node a3, third power tube G3 are connected with the collector of the 4th power tube G4, and form fourth node a4, the 5th function
The emitter of rate pipe G5 is connected with the collector of the 6th power tube G6, and forms the 5th node a5, wherein third node a3, the
Four node a4 and the 5th node a5 are connected with motor M.
In this embodiment, the base stage of the first power tube G1, the base stage of the second power tube G2, third power tube G3 base
Pole, the base stage of the 4th power tube G4, the base stage of the base stage of the 5th power tube G5 and the 6th power tube G6 with 160 phase of controller
Even.
In one embodiment of the utility model, as shown in Fig. 2, detection circuit 150 includes voltage sample resistance R1, electricity
Pressure sampling resistor R1 and filter capacitor E is connected in parallel.
Wherein, controller 160 is connected with voltage sample resistance R1, and controller 160 is used to be less than electricity in DC bus-bar voltage
Press threshold value, and controller 160 still output pwm signal when, judge power relay RY disconnect, and by inversion 140 to motor M into
Row zero vector stoppage protection.
In another embodiment of the utility model, as shown in figure 3, detection circuit 150 can also include the first electric current
Detect device R2 and the second current sensing device R3.
Wherein, the first current sensing device R2 be connected on the first relay KM1 other end and filter capacitor E one end it
Between, the second electric current electrical measurement device R3 is connected between one end of filter capacitor E and first node a1；Alternatively, as shown in figure 3,
One current sensing device R2 is connected between the other end of the second relay KM2 and the other end of filter capacitor E, the second electric current electricity
Device R 3 is surveyed to be connected between the other end of filter capacitor E and second node a2.Wherein, controller 160 respectively with the first electric current
Device R2 and the second current sensing device R3 is detected to be connected.
Specifically, in one example, controller 160 can be used for being calculated according to the first bus current and the second bus current
The capacitance current of filter capacitor E is flowed through, and when the discharge time for judging filter capacitor E according to capacitance current being greater than PWM cycle,
Judge that power relay RY is disconnected, and zero vector stoppage protection is carried out to motor M by inverter 140.Wherein, capacitance current etc.
Difference between the first bus current and the second bus current.
In another example, controller 160 can also be used to calculate electricity according to the first bus current and the second bus current
The phase current of machine M, and be 0 in the first bus current, and when the phase current of motor M is not 0, judge that power relay RY is disconnected,
And zero vector stoppage protection is carried out to motor M by inverter 140.
In the embodiments of the present invention, the first current sensing device R2 and the second current sensing device R3 be can be used
Current Hall element or current sampling resistor.
In another embodiment of the utility model, as shown in figure 4, detection circuit 150 can also include third electric current
Detect device R4.Wherein, one end of third current sensing device R4 is connected with the other end of filter capacitor E, third current detecting
The other end of device R 4 is connected with the other end of second node a2 and the second relay KM2 respectively.In this embodiment, controller
160 are also connected with third current sensing device R4.
Specifically, third current sensing device R4 can be directly used for detection and obtain capacitance current, and controller 160 can direct root
Judge whether the discharge time of filter capacitor E is greater than PWM cycle according to capacitance current, if so, by inverter 140 to motor M
Carry out zero vector stoppage protection.
Wherein, current Hall element or current sampling resistor can be used in third current sensing device R4.
In addition, detection circuit 150 can also include the 4th current sensing device (not shown), the 4th current detecting
Device can be directly used for the phase current of detection motor M.Meanwhile first current sensing device R2 detect to obtain the first bus current,
And then controller 160 can directly be judged according to the phase current of the first bus current and motor M.
It should be noted that upper, to carry out the shutdown of error protection zero vector to motor M by inverter 140 include: control the
One power tube G1, third power tube G3 and the 5th power tube G5 are open-minded simultaneously, and control the second power tube G2, the 4th power tube G4
It is simultaneously turned off with the 6th power tube G6；Alternatively, the first power tube G1 of control, third power tube G3 and the 5th power tube G5 are closed simultaneously
It is disconnected, and it is open-minded simultaneously to control the second power tube G2, the 4th power tube G4 and the 6th power tube G6.
For ease of understanding, the inverter breaking protection circuit of the utility model embodiment is described below with reference to Fig. 2-Fig. 8
Working principle.
When motor M runs well, if rupturing duty relay RY by force, it may appear that consequence shown in fig. 5, i.e. motor
M phase current can also continue a period of time, and filter capacitor is constantly in discharge condition until busbar voltage is down to Umin.When bus electricity
When forcing down to Umin, MCU chip (i.e. controller 160) and driving circuit (i.e. inverter 140) can not work, and motor M loses completely
Control enters generating state, and instantaneous sending one is more than the very high peak voltage Umax of DC bus-bar voltage.Therefore, it to eliminate in time
This failure, to protect the power device in driving circuit against damages.
For this reason, it may be necessary to promptly and accurately judge above-mentioned failure, the breakdown judge logic that the utility model uses is as follows:
Failure 1: when effective vector (non-zero vector), filter capacitor E will do it a discharge process, filtered electrical when zero vector
Hold E and has a charging process, it all can effective arrow in each PWM (Pulse Width Module, pulsewidth modulation) cycle T
The superposition of amount and zero vector, so filter capacitor E has the process of a charge and discharge in a PWM cycle T, at this point, capacitor
The corresponding relationship of electric current and pwm signal is as shown in Figure 6.If it exceeds one or more PWM cycle T, filter capacitor E are constantly in
Discharge process, it is believed that it is in an off state for power relay at this time, it needs to carry out zero vector stoppage protection to motor M.Its
In, capacitance current can be calculated by the first bus current and the second bus current, can also directly detect capacitance current.
Failure 2: referring to Fig. 3, while the first bus current and the second bus current, to reconstruct the phase current of motor M.When
When two bus currents are 0, phase current has also continued output waveform, it is believed that has cut off power by force under operating condition at this time
Relay needs to carry out zero vector stoppage protection.Certainly, the phase current of the first bus current and motor M can also be directly acquired, also
(the first mother can be calculated by the second bus current and phase current in the phase current that the second bus current and motor M can be acquired
Line current), to carry out the judgement of failure 2.
Failure 3 :-Fig. 4 referring to fig. 2 acquires DC bus-bar voltage Udc, if Udc is lower than some threshold value, controls simultaneously
Device 160 is also continuing PWM output, at this time it is believed that having cut off power relay by force under operating condition, needs to carry out
Zero vector stoppage protection.
Further, as shown in Figure 7, Figure 8, after carrying out zero vector shutdown to motor M, there is no lift for DC bus-bar voltage
It rises, is slowly reduced to 0 instead, the phase current of motor M is increased, until disappearing after motor M is totally stationary.
To sum up, according to the inverter breaking protection circuit of the utility model embodiment, can accurate judgement whether operating
Rupturing duty relay by force under state, and can under motor normal operation by force rupturing duty relay when, pass through
Inverter carries out zero vector stoppage protection to motor, avoids the damage of power device in inverter as a result,.
Fig. 9 is the structural block diagram according to the vehicle of the utility model embodiment.
As shown in figure 9, the vehicle 1000 includes the inverter power-off protecting circuit 100 of above-described embodiment.
The vehicle of the utility model embodiment can accurately be sentenced using the inverter power-off protecting circuit of above-described embodiment
It is disconnected whether under operating condition rupturing duty relay by force, and can under operating condition by force rupturing duty relay when,
Zero vector stoppage protection is carried out to motor by inverter, avoids the damage of power device in inverter as a result,.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure
Or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (9)
1. a kind of inverter power-off protecting circuit, which is characterized in that including power supply, switching circuit, filter circuit, inversion
Device, motor, detection circuit and controller, the power supply, the switching circuit, the filter circuit, the inverter and
The motor is sequentially connected, wherein
The detection circuit is connected with the switching circuit, the filter circuit and the inverter respectively, for detecting direct current
Busbar voltage, and/or, the first bus current and the second bus current, wherein first bus current is to flow through the filtering
The electric current of DC bus between circuit and the switching circuit, second bus current is flows through the filter circuit and institute
State the electric current of the DC bus between inverter；
The controller is connected with the detection circuit and the inverter respectively, and the controller is used for female according to the direct current
Line voltage, and/or, first bus current and second bus current judge whether the switching circuit disconnects, and
When judging that the switching circuit disconnects, zero vector stoppage protection is carried out to the motor by the inverter.
2. inverter power-off protecting circuit according to claim 1, which is characterized in that the switching circuit include power after
Electric appliance, the power relay include the first relay and the second relay, one end and the power supply of first relay
The anode of power supply is connected, and the other end of first relay is connected with the filter circuit, one end of second relay
It is connected with the cathode of the power supply, the other end of second relay is connected with the filter circuit.
3. inverter power-off protecting circuit according to claim 2, which is characterized in that the filter circuit includes filtered electrical
Hold, one end of the filter capacitor is connected with the other end of first relay, the other end of the filter capacitor with it is described
The other end of second relay is connected.
4. inverter power-off protecting circuit according to claim 3, which is characterized in that the inverter includes the first power
Pipe, the second power tube, third power tube, the 4th power tube, the 5th power tube and the 6th power tube, wherein
The collector of the collector of first power tube, the collector of the third power tube and the 5th power tube with
The anode of DC bus is connected, and forms first node；
The emitter of the emitter of second power tube, the emitter of the 4th power tube and the 6th power tube with
The cathode of the DC bus is connected, and forms second node；
The emitter of first power tube is connected with the collector of second power tube, and forms third node, and described
The emitter of three power tubes is connected with the collector of the 4th power tube, and forms fourth node, the 5th power tube
Emitter is connected with the collector of the 6th power tube, and forms the 5th node, wherein the third node, the described 4th
Node and the 5th node are connected with the motor；
The base stage of first power tube, the base stage of second power tube, the base stage of the third power tube, the 4th function
The base stage of the base stage of rate pipe, the base stage of the 5th power tube and the 6th power tube is connected with the controller.
5. inverter power-off protecting circuit according to claim 4, which is characterized in that the detection circuit, comprising:
Voltage sample resistance, the voltage sample resistance are connected in parallel with the filter capacitor；
Wherein, the controller is connected with the voltage sample resistance.
6. inverter power-off protecting circuit according to claim 4 or 5, which is characterized in that the detection circuit includes:
One current sensing device and the second current sensing device, wherein
First current sensing device is connected between the other end of first relay and one end of the filter capacitor,
The second electric current electrical measurement device is connected between one end of the filter capacitor and the first node；Or
First current sensing device be connected on second relay the other end and the filter capacitor the other end it
Between, the second electric current electrical measurement device is connected between the other end of the filter capacitor and the second node；
Wherein, the controller is connected with first current sensing device and second current sensing device respectively.
7. inverter power-off protecting circuit according to claim 6, which is characterized in that the first current sensing device and described
Second current sensing device is all made of current Hall element or current sampling resistor.
8. inverter power-off protecting circuit according to claim 4, which is characterized in that it is described by the inverter to institute
Stating motor progress zero vector stoppage protection includes:
It is open-minded simultaneously to control first power tube, the third power tube and the 5th power tube, and controls described second
Power tube, the 4th power tube and the 6th power tube simultaneously turn off；Or
It controls first power tube, the third power tube and the 5th power tube to simultaneously turn off, and controls described second
Power tube, the 4th power tube and the 6th power tube are open-minded simultaneously.
9. a kind of vehicle, which is characterized in that including inverter power-off protection electricity according to claim 1 to 8
Road.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821620286.3U CN208874274U (en) | 2018-09-30 | 2018-09-30 | Inverter power-off protection circuit and vehicle |
| PCT/CN2019/107416 WO2020063558A1 (en) | 2018-09-30 | 2019-09-24 | Power-off protection circuit for inverter, method, vehicle, and storage medium |
Applications Claiming Priority (1)
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| CN201821620286.3U CN208874274U (en) | 2018-09-30 | 2018-09-30 | Inverter power-off protection circuit and vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020063558A1 (en) * | 2018-09-30 | 2020-04-02 | 广东威灵汽车部件有限公司 | Power-off protection circuit for inverter, method, vehicle, and storage medium |
| CN111181132A (en) * | 2019-12-17 | 2020-05-19 | 苏州汇川技术有限公司 | Motor controller protection method, system, device and computer readable storage medium |
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2018
- 2018-09-30 CN CN201821620286.3U patent/CN208874274U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020063558A1 (en) * | 2018-09-30 | 2020-04-02 | 广东威灵汽车部件有限公司 | Power-off protection circuit for inverter, method, vehicle, and storage medium |
| CN111181132A (en) * | 2019-12-17 | 2020-05-19 | 苏州汇川技术有限公司 | Motor controller protection method, system, device and computer readable storage medium |
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Effective date of registration: 20190521 Address after: 528311 Building No. 21 Gangqian Road, Industrial Park, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: GUANGDONG WELLING AUTO PARTS Co.,Ltd. Address before: 528300 No. 2, Keyuan No. 2, Ronggui High-tech Development Zone, Shunde District, Foshan City, Guangdong Province Patentee before: GUANGDONG MIDEA ENVIRONMENT TECHNOLOGY Co.,Ltd. |