CN107750419A - Power conversion unit - Google Patents
Power conversion unit Download PDFInfo
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- CN107750419A CN107750419A CN201680003649.6A CN201680003649A CN107750419A CN 107750419 A CN107750419 A CN 107750419A CN 201680003649 A CN201680003649 A CN 201680003649A CN 107750419 A CN107750419 A CN 107750419A
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- capacitor
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- circuit
- conversion unit
- power conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
Abstract
The power model (10) of power conversion unit (100) has：On-off circuit, it has switch element；By the capacitor that the 1st and the 2nd capacitor (12a, 12b) is connected in series to (12), it is connected in parallel with on-off circuit；And terminal, it is connected between the 1st and the 2nd capacitor (12a, 12b), and power conversion unit (100) has：1st resistance (21), it is electrically connected between the positive pole of on-off circuit and the terminal；2nd resistance (22), it is electrically connected between the negative pole of on-off circuit and the terminal；And failure detector circuit (2), it is based on, in voltage caused by least one of the 1st resistance (21) and the 2nd resistance (22), detecting the short trouble of at least one of the 1st and the 2nd capacitor (12a, 12b).
Description
Technical field
The present invention relates to a kind of power conversion unit with power model.
Background technology
On existing power conversion unit, due to because of the switch carried in power model possessed by power conversion unit
The switch motion of element and cause to produce surge voltage and electromagnetic noise, it is therefore possible to can cause power due to surge voltage
Converting means failure, further, since electromagnetic noise and cause the environment around power conversion unit to be deteriorated.With regard to patent document 1
For shown power conversion unit, the built-in electric capacity for being used to suppress surge in the power model for carrying switch element
Device.The capacitor is used to make distribution inductance diminish, reduce the energy that distribution inductance is accumulated.Therefore, accumulated with distribution inductance
Energy be thus caused by surge voltage be reduced, and electromagnetic noise is inhibited.
Patent document 1：Japanese Unexamined Patent Publication 2014-187874 publications
The content of the invention
But the power conversion unit shown in patent document 1 is not to the failure of built-in capacitor in power model
The means detected, in the case where short trouble occurs for capacitor, it is possible to power supply short circuit occurs.Therefore, pass through in recent years
The failure of built-in capacitor in power model is detected and improves requirement as the reliability of power conversion unit
Become strong.
The present invention is exactly to propose in view of the foregoing, can be to interior in power model its object is to obtain one kind
The power conversion unit that the failure for the capacitor put is detected.
In order to solve above-mentioned problem, realize purpose, power conversion unit of the invention has power model, in the power
In converting means, power model has：On-off circuit, it has switch element；The electricity that 1st and the 2nd capacitor is connected in series
Container pair, it is connected in parallel with on-off circuit；And terminal, it is connected between the 1st and the 2nd capacitor, power conversion dress
Putting has：1st resistance, it is electrically connected between the positive pole of on-off circuit and terminal；2nd resistance, it is electrically connected to on-off circuit
Negative pole and terminal between；And failure detector circuit, it is based on caused by least one of the 1st resistance and the 2nd resistance
Voltage, the short trouble of at least one of the 1st and the 2nd capacitor is detected.
The effect of invention
Power conversion unit of the present invention has following effects, i.e. can be to built-in electric capacity in power model
The failure of device is detected.
Brief description of the drawings
Fig. 1 is the figure for the configuration example for representing the power conversion unit that embodiment 1 is related to.
Fig. 2 is to represent the potential difference when the 1st and the 2nd capacitor shown in Fig. 1 is normal between neutral point and negative line
Figure.
Fig. 3 is to represent the potential difference when short trouble occurs for the 1st capacitor shown in Fig. 1 between neutral point and negative line
Figure.
Fig. 4 is to represent the potential difference when short trouble occurs for the 2nd capacitor shown in Fig. 1 between neutral point and negative line
Figure.
Fig. 5 is the figure for the configuration example for representing the power conversion unit that embodiment 2 is related to.
Fig. 6 is the figure for the state that open fault does not occur for the 1st capacitor for representing shown in Fig. 5.
Fig. 7 is the voltage of neutral point for representing to detect when open fault does not occur for the 1st capacitor shown in Fig. 5
Figure.
Fig. 8 is the figure for the state for representing the 1st capacitor generation open fault shown in Fig. 5.
Fig. 9 is the figure of the voltage of neutral point for representing to detect when open fault occurs for the 1st capacitor shown in Fig. 5.
Figure 10 is the figure for the state that open fault does not occur for the 2nd capacitor for representing shown in Fig. 5.
Figure 11 is the voltage of neutral point for representing to detect when open fault does not occur for the 2nd capacitor shown in Fig. 5
Figure.
Figure 12 is the figure for the state for representing the 2nd capacitor generation open fault shown in Fig. 5.
Figure 13 is the figure of the voltage of neutral point for representing to detect when open fault occurs for the 2nd capacitor shown in Fig. 5.
Embodiment
Below, based on accompanying drawing, the power conversion unit that embodiments of the present invention are related to is described in detail.In addition,
The present invention is not limited by present embodiment.
Embodiment 1.
Fig. 1 is the figure for the configuration example for representing the power conversion unit that embodiment 1 is related to.The power that embodiment 1 is related to
Converting means 100 has：Power model 10；1st resistance 21, its one end are connected with the positive pole of direct voltage source 1；And the 2nd electricity
Resistance 22, it is connected with the negative pole of direct voltage source 1.Direct voltage source 1 both can be the power supply outside module package, can also
For capacitor built in inside packaging part etc..
Power model 10 have will use carborundum (Silicon Carbide：SiC) formed the 1st switch element 11a and
Using the voltage-type bridge circuit 11 of SiC the 2nd switch element 11b formed the upper and lower bridge arm structures being connected in series.Voltage-type bridge electricity
Road 11 can also be the on-off circuit at least having 1 switch element.In addition, power model 10 has for removing noise
1st capacitor 12a and for removing capacitor that the 2nd capacitor 12b of noise is connected in series to 12.Capacitor is to 12 and voltage
Type bridge circuit 11 is connected in parallel.That is, capacitor is connected in parallel in 12 between the positive pole and negative pole of above-mentioned on-off circuit.
In addition, power model 10 has the 2nd terminal 14, the 3rd terminal 15, the 4th terminal 16, the 5th terminal 17 and is connected to
Terminal between 1st capacitor 12a and the 2nd capacitor 12b is the 1st terminal 13.
2nd terminal 14 is connected with the electrode line 1a of direct voltage source 1, to voltage-type bridge circuit 11 and capacitor to 12
One end assigns the terminal of the 1st current potential.3rd terminal 15 is connected with the negative line 1b of direct voltage source 1, to voltage-type bridge circuit 11
And capacitor to 12 the other end assign the 2nd current potential terminal.2nd current potential is the current potential lower than the 1st current potential.2nd switch element
11b and the 2nd capacitor 12b are connected with the 3rd terminal 15.1st switch element 11a and the 2nd switch element 11b tie point and the 4th
Terminal 16 connects.
In addition, power conversion unit 100 has：Failure detector circuit 2, it is examined to capacitor to 12 short trouble
Survey；And drive control circuit 3, it is to the logical of the 1st switch element 11a in voltage-type bridge circuit 11 and the 2nd switch element 11b
Disconnected action is controlled.Drive control circuit 3 is connected with the 5th terminal 17, from drive control circuit 3 export drive signal via
5th terminal 17 and input to the 1st switch element 11a and the 2nd switch element 11b.
1st resistance 21 is connected with electrode line 1a.In addition, the 2nd terminal 14 is connected with electrode line 1a, i.e. the 1st switch element 11a
One end connected with the 1st capacitor 12a one end.One end of 2nd resistance 22 is connected with negative line 1b.In addition, the 3rd terminal 15 with
Negative line 1b connections, i.e. one end of the 2nd switch element 11b connect with the 2nd capacitor 12b one end.
1st and the 2nd resistance 21, the 22 respective other ends are connected with the 1st terminal 13.1st capacitor 12a and the 2nd capacitor
12b neutral point 12c is connected via the 1st terminal 13 with the tie point of the 1st resistance 21 and the 2nd resistance 22.That is, the 1st resistance 21
One end electrically connected with the positive pole of described on-off circuit, the other end is connected with the 1st terminal 13.In addition, one end of the 2nd resistance 22
Electrically connected with the negative pole of described on-off circuit, the other end is connected with the 1st terminal 13.
Load device 4 is connected with the 3rd terminal 15 and the 4th terminal 16.As load device 4, electric rotating machine can be exemplified.
Below, the action to power conversion unit 100 illustrates.Drive control circuit 3 is based on from drive control circuit 3
The outside voltage instruction assigned, generate the drive signal being driven to the 1st and the 2nd switch element 11a, 11b, generated
Drive signal is assigned to the 1st and the 2nd switch element 11a, 11b, the 1st and the 2nd switch element 11a, 11b via the 5th terminal 17
The analog sine of constant voltage and frequency is supplied to load device 4 by carrying out on-off action.
The voltage according to caused by the 1st and the 2nd resistance 21, at least one of 22 of failure detector circuit 2, to the 1st and the 2nd
At least one of capacitor 12a, 12b short trouble are detected.Below, the failure carried out to failure detector circuit 2
Action during detection is specifically described.
Fig. 2 is to represent the potential difference when the 1st and the 2nd capacitor shown in Fig. 1 is normal between neutral point and negative line
Figure.Fig. 3 is the figure for representing the potential difference when short trouble occurs for the 1st capacitor shown in Fig. 1 between neutral point and negative line.
Fig. 4 is the figure for representing the potential difference in the short trouble of the 2nd capacitor shown in Fig. 1 between neutral point and negative line.
In the case of the 1st capacitor 12a shown in Fig. 1 and the 2nd capacitor 12b are normal, as shown in Fig. 2 neutral point 12c
Potential difference between negative line 1b turns into the value of the half of the output voltage of direct voltage source 1.In fig. 2, due to by direct current
The output voltage of voltage source 1 is assumed to 600V, therefore neutral point potential is 300V.
Shown in Fig. 1 the 1st capacitor 12a occur short trouble and the 2nd capacitor 12b it is normal in the case of, such as Fig. 3
Shown, the potential difference between neutral point 12c and negative line 1b turns into the output voltage identical value with direct voltage source 1.In Fig. 3
In, due to the output voltage of direct voltage source 1 is assumed into 600V, therefore neutral point potential is 600V.
In the case of and the 2nd capacitor 12b generation short troubles normal in the 1st capacitor 12a shown in Fig. 1, such as Fig. 4
Shown, the potential difference between neutral point 12c and negative line 1b turns into 0V.In Fig. 4, it is the output voltage of direct voltage source 1 is false
It is set to 600V, but neutral point potential is 0V.
Failure detector circuit 2 shown in Fig. 1 is in voltage caused by least one of the 1st resistance 21 and the 2nd resistance 22
Detected, at least one of the 1st and the 2nd capacitor 12a, 12b short trouble is carried out according to the voltage detected
Detection.
Built-in capacitor is not easy to change in power model 10, the work(of the construction especially covered in capacitor by resin
In the case of rate module 10, replacing of the capacitor to 12 is difficult to sometimes.In addition, the situation of short trouble occurs in capacitor
Under, user is possible without finding the failure of capacitor, and it is therefore possible to occur to continue in the state of short trouble in capacitor
Carry out the energization from direct voltage source 1 to power model 10 and cause power supply short circuit.
The power conversion unit 100 being related to according to embodiment 1, due to can be to built-in electric capacity in power model 10
The short trouble of device is detected, therefore can be utilized testing result and be taken and cut off direct voltage source 1 and power model 10
Deng measure.As an example, the structure for being provided with shutter in electrode line 1a or negative line 1b, failure detector circuit 2
It is to continue to keep direct voltage source 1 and power model 10 by shutter control in the case where not detecting capacitor faults
Connection, in the case where detecting capacitor faults, the company by shutter control for releasing direct voltage source 1 and power model 10
Connect.This shutter control function can both be arranged at failure detector circuit 2, can also be arranged at drive control circuit 3.Setting
In the case of being placed in drive control circuit 3, drive control circuit 3 is to detect event from the importing expression of failure detector circuit 2 whether there is
The information of barrier, structure of the output for the opening and closing instruction of shutter.
The power conversion unit 100 being related to according to embodiment 1, due to can be to built-in electric capacity in power model 10
The failure of device is detected, therefore power supply short circuit can suppress.In addition, the work(being related to according to embodiment 1
Rate converting means 100, can be to causing power model 10 to be destroyed this due to excessive electric current as caused by power supply short circuit
Situation is suppressed, therefore can improve power conversion unit 100 reliability of itself.
In addition, in embodiment 1, as an example of the on-off circuit with switch element, using voltage-type bridge
Circuit 11 is illustrated.That is, the upper and lower bridge arm i.e. voltage-type bridge electricity being made up of 2 switch elements is used as on-off circuit
Road 11 is illustrated, but can also be only with 1 switch element.
In the present embodiment, the structure of upper and lower bridge arm of the power model 10 with a phase is disclosed, but can also be had
Multiple upper and lower bridge arms such as the upper and lower bridge arm of three-phase.
In addition, power conversion unit 100 of the present embodiment has two be connected in antiparallel with each switch element
Pole pipe, but the diode can both be built in switch element, can also not have diode in itself.
In addition, in the present embodiment, the feelings to being connected with on-off circuit between the positive pole and negative pole of direct voltage source 1
Condition is illustrated, but can be in the switching circuit portion application present embodiment of conventional setting buffer circuit.That is, this implementation
Mode can be applied to a part of on-off circuit among circuit entirety.
Embodiment 2.
Fig. 5 is the figure for the configuration example for representing the power conversion unit that embodiment 2 is related to.The power that embodiment 2 is related to
Converting means 100-2 can detect to the 1st and the 2nd capacitor 12a, 12b short trouble and open fault respectively.Implement
The structure of the power model 10 for the power conversion unit 100-2 that mode 2 is related to is identical with embodiment 1.Embodiment 1 and implementation
The difference of mode 2 is as follows.
(1) power conversion unit 100-2 has failure detector circuit 2-2, to substitute the failure detector circuit of embodiment 1
2。
(2) power conversion unit 100-2 is except the 1st resistance 21, the 2nd resistance 22 and the power model 10 of embodiment 1
In addition, also with the 1st opening/closing portion 31 and the 2nd opening/closing portion 32.
1st opening/closing portion 31 is the opening/closing unit that the 1st resistance 21 and the 1st terminal 13 are attached or disconnected, and is configured at
Between the other end and the 1st terminal 13 of 1st resistance 21.Specifically, one end of the 1st opening/closing portion 31 and the 1st resistance 21 is another
End connection, the other end of the 1st opening/closing portion 31 are connected to one end and the 1st terminal 13 of the 2nd opening/closing portion 32.
2nd opening/closing portion 32 is the opening/closing unit that the 2nd resistance 22 and the 1st terminal 13 are attached or disconnected, and is configured at
Between the other end and the 1st terminal 13 of 2nd resistance 22.Specifically, one end of the 2nd opening/closing portion 32 and the 2nd resistance 22 is another
End connection, the other end of the 2nd opening/closing portion 32 are connected to one end and the 1st terminal 13 of the 1st opening/closing portion 31.
Failure detector circuit 2-2 is controlled to the break-make of the 1st and the 2nd opening/closing portion 31,32 respectively, respectively to the 1st and
The voltage that the both ends of 2nd resistance 21,22 apply is detected.Transient response voltage of the voltage equivalent to CR circuits.Failure is examined
Slowdown monitoring circuit 2-2 by being detected in voltage caused by the 1st and the 2nd resistance 21, at least one of 22, thus to the 1st and
At least one of 2nd capacitor 12a, 12b short trouble or open fault is detected.Below, to failure detector circuit
The action during fault detect that 2-2 is carried out is specifically described.
(detection of the open fault of the 1st capacitor)
Fig. 6 is the figure for the state that open fault does not occur for the 1st capacitor for representing shown in Fig. 5.Fig. 7 is represented in Fig. 5 institutes
The figure of the voltage of the neutral point detected during open fault does not occur for the 1st capacitor shown.If do not sent out in the 1st capacitor 12a
The state remained open during raw open fault by failure detector circuit 2-2 controls for the 2nd opening/closing portion 32 and the 1st opening/closing portion 31
It is changed into connecting from disconnection, then is changed in the neutral point 12c voltage V1 applied with the transient response shown in Fig. 7.
Fig. 8 is the figure for the state for representing the 1st capacitor generation open fault shown in Fig. 5.Fig. 9 is represented shown in Fig. 5
The 1st capacitor the figure of the voltage of neutral point detected during open fault occurs.If opened a way in the 1st capacitor 12a
During failure, the state that is remained open by failure detector circuit 2-2 controls for the 2nd opening/closing portion 32 and the 1st opening/closing portion 31 are from disconnection
It is changed into connecting, then is changed in the neutral point 12c voltage V2 applied with the transient response shown in Fig. 9.
Time of the timeconstantτ of the transient response of voltage V2 shown in Fig. 9 than the transient response of the voltage V1 shown in Fig. 7
Constant, τ is short.Because the 1st capacitor 12a occur open fault in the case of, the value of electric capacity diminishes, transient response when
Between constant, τ shorten.
(detection of the open fault of the 2nd capacitor)
Figure 10 is the figure for the state that open fault does not occur for the 2nd capacitor for representing shown in Fig. 5.Figure 11 is represented in Fig. 5
The figure of the voltage of the neutral point detected during open fault does not occur for the 2nd shown capacitor.If in the 2nd capacitor 12b not
The state remained open during generation open fault by failure detector circuit 2-2 controls for the 1st opening/closing portion 31 and the 2nd opening/closing portion
32 are changed into connecting from disconnection, then are changed in the neutral point 12c voltage V3 applied with the transient response shown in Figure 11.
Figure 12 is the figure for the state for representing the 2nd capacitor generation open fault shown in Fig. 5.Figure 13 is represented in Fig. 5 institutes
The figure of the voltage of the neutral point detected during open fault occurs for the 2nd capacitor shown.If opened in the 2nd capacitor 12b
During the failure of road, the state that is remained open by failure detector circuit 2-2 controls for the 1st opening/closing portion 31 and the 2nd opening/closing portion 32 are from disconnected
Open and be changed into connecting, be then changed in the neutral point 12c voltage V4 applied with the transient response shown in Figure 13.
Transient response of the timeconstantτ of the transient response of voltage V4 shown in Figure 13 than the voltage V3 shown in Figure 11 when
Between constant, τ it is short.Because in the case where open fault occurs for the 2nd capacitor 12b, the value of electric capacity diminishes, transient response
Timeconstantτ shortens.
So, the failure detector circuit 2-2 that embodiment 2 is related to is by comparing to 31,32 points of the 1st and the 2nd opening/closing portion
The time constant of the transient response of the front and rear voltage applied in neutral point 12c is not controlled, thus, it is possible to open capacitor
Road failure is detected.In the case where open fault occurs for capacitor, surge voltage and noise are possible to increase.According to implementation
The power conversion unit 100-2 that mode 2 is related to, due to can be detected to the open fault of capacitor, therefore it can utilize
Testing result and take and direct voltage source 1 and power model 10 such as cut off at the measure.Therefore, open fault occurs in capacitor
In the case of, the increase of surge voltage and noise can also be suppressed.
In addition, by the way that the 1st and the 2nd opening/closing portion 31,32 is being controlled as into on-state by failure detector circuit 2-2
Under state, to be detected with the identical method of embodiment 1 to voltage, thus, it is possible to respectively to the 1st and the 2nd capacitor 12a,
12b short trouble is detected.In addition, as long as being applied with the output voltage of direct voltage source 1 can just be detected, therefore
Without the connection of direct voltage source 1 and power model 10 is cut off.
In addition, the 1st and the 2nd switch element 11a, the 11b formed by SiC is used in embodiment 1,2, but the 1st and the 2nd
Switch element 11a, 11b can also be employed as the silicon (Silicon of leading semiconductor material：Si).It is known formed by SiC
1 and the 2nd switch element 11a, 11b is low-loss, and the voltage oscillation for being referred to as damped oscillation but then is big.Therewith together,
The increase of the noise as caused by damped oscillation may be occurred using the power conversion unit of the switch element formed as SiC.
Used in embodiment 1,2 by the 1st and the 2nd switch element 11a, the 11b formed by SiC constructions covered using resin
Power model 10, therefore the noise as caused by damped oscillation can be mitigated, and the failure of capacitor can be detected.Cause
This, the power conversion unit that embodiment 1,2 is related to can play SiC low-loss while ensuring reliability.
In addition, the on-off circuit of embodiment 1,2 has the upper and lower bridge arm structure of 2 switch elements in series connections.Separately
Outside, when the failure detector circuit of embodiment 1,2 is normal to the 1st and the 2nd capacitor voltage caused by the 2nd resistance and the 1st or
2nd capacitor occurs to be compared in voltage caused by the 2nd resistance when short trouble or open fault, thus to the 1st or the 2nd electricity
The short trouble or open fault of container are detected.In addition, the failure detector circuit of embodiment 1,2 is to the 1st and the 2nd electric capacity
When short trouble or open fault occur for voltage caused by the 1st resistance and the 1st or the 2nd capacitor in the 1st resistance when device is normal
Caused voltage is compared, and thus the short trouble or open fault of the 1st or the 2nd capacitor are detected.In addition, implement
The power conversion unit of mode 1,2 has shutter, and the shutter is detecting the 1st and the 2nd capacitor by failure detector circuit
At least one of short trouble or open fault in the case of, the connection of DC voltage power supply and power model is cut off.
In addition, failure detector circuit is in the connection or disconnection of the 1st opening/closing portion or the 2nd opening/closing portion, based in the 1st resistance and the 2nd resistance
At least one of caused by voltage transient response time constant, the short circuit at least one of the 1st and the 2nd capacitor
Failure or open fault are detected.
More than embodiment shown in representation be present disclosure an example, additionally it is possible to it is public with other
The technology known is combined, and a part for structure can also be omitted in the scope for the purport for not departing from the present invention, changed.
The explanation of label
1 direct voltage source, 1a electrode lines, 1b negative lines, 2,2-2 failure detector circuits, 3 drive control circuits, 4 load dresses
Put, 10 power models, 11 voltage-type bridge circuits, the switch elements of 11a the 1st, the switch elements of 11b the 2nd, 12 capacitors pair, 12a the 1st
Capacitor, the capacitors of 12b the 2nd, 12c neutral points, 13 the 1st terminals, 14 the 2nd terminals, 15 the 3rd terminals, 16 the 4th terminals, 17 the 5th ends
Son, 21 the 1st resistance, 22 the 2nd resistance, 31 the 1st opening/closing portions, 32 the 2nd opening/closing portions, 100,100-2 power conversion units.
Claims (8)
1. a kind of power conversion unit, it has power model,
In the power conversion unit,
The power model has：On-off circuit, it has switch element；The capacitor that 1st and the 2nd capacitor is connected in series
Right, it is connected in parallel with the on-off circuit；And terminal, it is connected between the 1st and the 2nd capacitor,
The power conversion unit has：
1st resistance, it is electrically connected between the positive pole of the on-off circuit and the terminal；
2nd resistance, it is electrically connected between the negative pole of the on-off circuit and the terminal；And
Failure detector circuit, it is based in voltage caused by least one of the 1st resistance and the 2nd resistance, to institute
The short trouble for stating at least one of the 1st and the 2nd capacitor is detected.
2. a kind of power conversion unit, it has power model,
In the power conversion unit,
The power model has：On-off circuit, it has switch element；The capacitor that 1st and the 2nd capacitor is connected in series
Right, it is connected in parallel with the on-off circuit；And terminal, it is connected between the 1st and the 2nd capacitor,
The power conversion unit has：
1st resistance, its one end are connected with the positive pole of the on-off circuit；
1st opening/closing portion, it is configured between the other end of the 1st resistance and the terminal, by the 1st resistance and the end
Son is attached or disconnected；
2nd resistance, its one end are connected with the negative pole of the on-off circuit；
2nd opening/closing portion, it is configured between the other end of the 2nd resistance and the terminal, by the 2nd resistance and the end
Son is attached or disconnected；And
Failure detector circuit, it is based in voltage caused by least one of the 1st resistance and the 2nd resistance, to institute
The short trouble or open fault for stating at least one of the 1st and the 2nd capacitor are detected.
3. power conversion unit according to claim 1 or 2, it is characterised in that
The on-off circuit has the upper and lower bridge arm structure of 2 switch elements in series connections.
4. power conversion unit according to any one of claim 1 to 3, it is characterised in that
In voltage caused by the 2nd resistance and described the when the failure detector circuit is normal to the described 1st and the 2nd capacitor
1 or the 2nd capacitor occurs to be compared in voltage caused by the 2nd resistance when short trouble or open fault, thus to institute
The short trouble or open fault for stating the 1st or the 2nd capacitor are detected.
5. power conversion unit according to any one of claim 1 to 4, it is characterised in that
In voltage caused by the 1st resistance and described the when the failure detector circuit is normal to the described 1st and the 2nd capacitor
1 or the 2nd capacitor occurs to be compared in voltage caused by the 1st resistance when short trouble or open fault, thus to institute
The short trouble or open fault for stating the 1st or the 2nd capacitor are detected.
6. power conversion unit according to any one of claim 1 to 5, it is characterised in that
With shutter, the shutter in the 1st and the 2nd capacitor is detected by the failure detector circuit at least one
In the case of the short trouble or open fault of person, the connection of DC voltage power supply and the power model is cut off.
7. power conversion unit according to claim 2, it is characterised in that
The failure detector circuit is in the connection or disconnection of the 1st opening/closing portion or the 2nd opening/closing portion, based on described
The time constant of the transient response of voltage caused by least one of 1 resistance and the 2nd resistance, to the described 1st and the 2nd electricity
The short trouble or open fault of at least one of container are detected.
8. power conversion unit according to any one of claim 1 to 7, it is characterised in that
1st and the 2nd switch element is using carborundum formation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/064922 WO2017199405A1 (en) | 2016-05-19 | 2016-05-19 | Power conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107750419A true CN107750419A (en) | 2018-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680003649.6A Pending CN107750419A (en) | 2016-05-19 | 2016-05-19 | Power conversion unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2017199405A1 (en) |
| CN (1) | CN107750419A (en) |
| WO (1) | WO2017199405A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7447838B2 (en) * | 2021-02-05 | 2024-03-12 | 株式会社アイシン | Rotating electrical machine control system |
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| JP5784235B2 (en) * | 2012-08-10 | 2015-09-24 | 三菱電機株式会社 | 3-level power converter |
-
2016
- 2016-05-19 JP JP2016575591A patent/JPWO2017199405A1/en active Pending
- 2016-05-19 WO PCT/JP2016/064922 patent/WO2017199405A1/en active Application Filing
- 2016-05-19 CN CN201680003649.6A patent/CN107750419A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07170758A (en) * | 1993-12-13 | 1995-07-04 | Nippon Electric Ind Co Ltd | Detecting method of short circuit of bridge circuit in power converter |
| CN1700577A (en) * | 2004-05-21 | 2005-11-23 | 三洋电机株式会社 | Inverter device for automobile |
| CN102959847B (en) * | 2010-06-25 | 2016-01-13 | 东芝三菱电机产业系统株式会社 | Power conversion device |
| CN102624324A (en) * | 2011-01-28 | 2012-08-01 | 洛克威尔自动控制技术股份有限公司 | Drive failure protection |
| CN203368336U (en) * | 2013-08-08 | 2013-12-25 | 浙江海利普电子科技有限公司 | Frequency converter |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017199405A1 (en) | 2017-11-23 |
| JPWO2017199405A1 (en) | 2018-05-31 |
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