JP2004187368A - Power converter for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power converter for vehicles capable of assuring compatibility of a unit for housing a switching element manufactured by a different maker and capable of reducing induction failure. <P>SOLUTION: The power converter for vehicles comprises a switching element for converting an electric power, a first core group provided on the input side in the power converter, and a second core group provided on the output side in the unit. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle power converter.
[0002]
[Prior art]
A conventional vehicle power converter will be described in detail with reference to the drawings. FIG. 6 is a configuration diagram of a conventional vehicle power converter. FIG. 7 is a front view of the core. FIG. 8 is a right side view of the core.
The conventional vehicular power converter is electrically connected to a pantograph 2, which is engaged with the overhead wire 1, a disconnector 3, which functions as a switch, a disconnector 4, a charging resistor 5, a reactor 6 for smoothing a current, and the like. Is done. The conventional vehicle power converter includes a filter capacitor 7 for charging power, a three-phase bridge circuit 8, a unit 9 for housing the three-phase bridge circuit 8 therein, and the like, and is connected to a load 10 and a core 11. . 12 is a rail. In the vehicle power converter thus configured, overhead power is supplied to the capacitor 7 via the pantograph 1, the disconnector 3, the charging resistor 5, and the reactor 6 when the railway vehicle is driven. When the charging of the capacitor 7 is completed, the disconnector 4 is closed. When the disconnector 4 is closed, the overhead power is supplied to the three-phase bridge circuit 8 via the pantograph 2, the disconnector 3, the disconnector 4, and the reactor 6. The three-phase bridge circuit 8 converts the power into three-phase AC power. The three-phase AC power converted by the three-phase bridge circuit 8 is supplied to a load 10 via a core 11 provided outside the unit 9, and the load 10 is driven.
[0003]
In the power converter for a vehicle configured as described above, when the switching element 13 in the three-phase bridge circuit 8 performs a switching operation, a voltage having a large voltage rising rate or a voltage falling rate is generated on the input / output line of the switching element 13. I do. The voltage generated at the input / output line of the switching element 13 causes a leakage current due to the floating capacitance of the load 10. The component of the leakage current is a high frequency, which induces a voltage in a signal device installed near the rail 12 and causes an induction failure. In order to prevent an induction failure of a signal device, a method of increasing the impedance at a high frequency of a wiring (input / output line) connected to the input / output side of the switching element 13 has been adopted. In order to increase the impedance of the input / output lines with respect to the high frequency, the wires are collectively penetrated through the core 11 made of a ferromagnetic material. Since the sum of the low-frequency components including the direct current of the current passing through the core 11 becomes 0, the impedance for the high-frequency component can be secured without the core being saturated.
The core 11 of the conventional power converter for a vehicle configured as described above has a hollow cylindrical shape (see FIGS. 7 and 8). The core 11 is made of a ferromagnetic material such as ferrite or amorphous metal.
[0004]
[Non-patent document 1]
IEEJ Technical Report No. 676: Harmonic Countermeasures for AC Electric Railway Vehicles, IEEJ, April 1998, 75
[Problems to be solved by the invention]
However, the conventional power changing device for a vehicle configured as described above is usually manufactured by a plurality of manufacturers, and the unit 9 containing the switching element 13 is required to have compatibility between the manufacturers. However, the know-how of each manufacturer is gathered in the unit 9 containing the switching element 13, and dv / dt generated by switching also differs between the manufacturers. Therefore, in such a power converter, in order to ensure compatibility of the unit 9 containing the switching element 13, the number of the cores 11 is selected according to the unit of the manufacturer that generates the highest dv / dt. However, in each of the manufacturers' devices, the same number of cores 11 had to be installed outside the unit 9. This makes the device heavier than necessary and reduces the driving efficiency of the electric vehicle.
In addition, since the core 11 is installed outside the unit 9 containing the switching element 13, a leakage current flows through a floating capacitance existing between the wiring from the unit 9 to the core 11 and the device box frame, thereby causing an induction failure. Was a factor.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle power converter that can ensure compatibility of units housing switching elements manufactured by different manufacturers and can reduce induction trouble.
[0006]
[Means for Solving the Problems]
A vehicular power converter according to the present invention includes a switching element for converting power, a first core group provided on an input side in a vehicular power converter, and a first core group provided on an output side in a vehicular power converter. And a second core group provided.
A vehicle power converter according to the present invention includes a switching element for converting power and a core provided on an input side in the vehicle power converter. A vehicular power converter according to the present invention includes a switching element for converting power and a core provided on an output side in the vehicular power converter. A vehicle power converter according to the present invention includes a switching element for converting power, a first core group provided on an input side in the vehicle power converter, and a first core group provided on an input side outside the vehicle power converter. And a second core group provided.
A vehicular power converter according to the present invention includes a switching element for converting power, a first core group provided on an output side in the vehicular power converter, and a first core group provided on an output side outside the vehicular power converter. And a second core group provided.
A vehicle power converter according to the present invention includes a switching element for converting power, a plurality of cores provided on an input side of the vehicle power converter, and a plurality of cores provided on an output side of the vehicle power converter. And a plurality of cores.
[0007]
The vehicular power converter according to the present invention includes a switching element for converting power, a plurality of cores provided on an input side of the vehicular power converter and penetrated by conductors or electric wires, and a vehicular power converter. And a plurality of cores provided on the output side and penetrated by a conductor or an electric wire.
A vehicular power converter according to the present invention includes a switching element for converting power, a first core group provided on an input side of the vehicular power converter and penetrated by a conductor or an electric wire, and a vehicular power converter. And a second core group penetrated by a conductor or an electric wire, which is provided on the output side of the inside.
A vehicle power converter according to the present invention is characterized by having a switching element for converting power and a core provided on an input side in the vehicle power converter and penetrated by a conductor or an electric wire.
A vehicle power converter according to the present invention includes a switching element for converting power, and a core provided on an output side of the vehicle power converter and penetrated by a conductor or an electric wire.
A vehicular power converter according to the present invention includes a switching element for converting power, a first core group provided on an input side of the vehicular power converter and penetrated by a conductor or an electric wire, and a vehicular power converter. A second core group provided on the outside input side and penetrated by a conductor or an electric wire.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
A vehicle power converter according to a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of a power conversion device according to a first embodiment of the present invention. Note that components that are structurally identical to those described in FIG. 6 are given the same reference numerals and description thereof is omitted.
A vehicular power converter according to a first embodiment of the present invention includes a pantograph engaged with an overhead wire, a disconnector serving as a switch, a disconnector, a charging resistor, and a current smoothing unit. Electrically connected to the reactor 6 and the like. The vehicular power converter configured as described above includes a filter capacitor 7 for charging power, a three-phase bridge circuit 8, a detachable unit 9 containing the three-phase bridge circuit 8 therein, and a core 11, and a load 10 is connected.
In the vehicle power converter configured as described above, the first core group 11a and the second core group 11b are installed on the input side and the output side in the unit. In this specification, the output side indicates a side on which the unit 9 outputs power to a load, and the input side indicates a side on which the unit 9 is supplied with overhead power via the pantograph 2 or the like. is there.
In the power converter for a vehicle configured as described above, by disposing the core 11a and the core 11b very close to the switching element 13 that is a noise generation source, this has been a problem in the conventional power converter for a vehicle. It is possible to prevent a leakage current from flowing through the floating capacitance existing between the wiring and the device box frame.
[0009]
In the vehicle power converter configured as described above, even when the switching elements 13 manufactured by different manufacturers are housed, the units 9 are made compatible by adjusting the numbers of the cores 11a and 11b, respectively. I can do it.
The power converter for a vehicle configured as described above can select the optimal number of cores 11 for the switching elements 13 mounted on the unit 9, and therefore can reduce the space required by the conventional power converter for a vehicle. Can be mounted in a small space. As a result, downsizing and weight reduction can be realized.
(Second embodiment)
A vehicle power converter according to a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 is a configuration diagram of a power conversion device according to a second embodiment of the present invention. Note that components that are structurally identical to those described in FIG. 1 are given the same reference numerals and description thereof is omitted.
A vehicular power converter according to a second embodiment of the present invention comprises a pantograph engaged with an overhead wire, a disconnector acting as a switch, a disconnector, a charging resistor, and a current smoothing unit. Electrically connected to the reactor 6 and the like. The power converter configured as described above includes a filter capacitor 7 for charging power, a three-phase bridge circuit 8, a detachable unit 9 in which the three-phase bridge circuit 8 is housed, and a core 11. It is connected.
[0010]
In the vehicle power converter configured as described above, the core 11 a is installed on the input side in the unit 9.
In the vehicle power converter configured as described above, since the core 11a is provided only on the input side, an effect such as reduction of high-frequency current by switching of the switching element 13 can be expected only on the overhead wire 1 and the return side. . Therefore, it is preferably used when the system is a small system in which the load side of a motor or the like is closed and only reduction of radio noise from overhead lines and return lines is required.
In the vehicle power converter configured as described above, by disposing the core 11a very close to the switching element 13 that is a noise generation source, the wiring and the device, which are problematic in the conventional vehicle power converter, It is possible to prevent a leakage current from flowing through the floating capacitance existing between the box frames.
In the vehicle power converter configured as described above, even when the switching elements 13 manufactured by different manufacturers are housed, the units 9 can be made compatible by adjusting the number of the cores 11a. .
The power converter for a vehicle configured as described above can select the optimal number of cores 11 for the switching elements 13 mounted on the unit 9, and therefore can reduce the space required by the conventional power converter for a vehicle. Can be mounted in a small space. As a result, downsizing and weight reduction can be realized.
[0011]
(Third embodiment)
A vehicle power converter according to a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 is a configuration diagram of a power conversion device according to a third embodiment of the present invention. 1 and 2 are denoted by the same reference numerals and description thereof will be omitted.
A vehicular power converter according to a third embodiment of the present invention includes a pantograph engaged with an overhead wire, a disconnector acting as a switch, a disconnector, a charging resistor, and a current smoothing unit. Electrically connected to the reactor 6 and the like. The power converter for a vehicle configured as described above includes a filter capacitor 7 for charging power, a three-phase bridge circuit 8, a detachable unit 9 in which the three-phase bridge circuit 8 is housed, and a core 11, and a load. 10 is connected. ing.
In the vehicle power converter configured as described above, the core 11b is installed on the input side in the unit 9.
In the power converter for a vehicle configured as described above, since the core 11b is provided only on the output side, the effect of reducing high frequency current by switching of the switching element 13 can be expected only on the load side such as a motor. Therefore, it is preferable to use the high-frequency leakage current on the load side of the motor or the like when it is a major factor of the induction failure and the influence is small on the overhead line and the return side.
[0012]
In the vehicle power converter configured as described above, by disposing the core 11b very close to the switching element 13 that is a noise source, the wiring and the device, which are problems in the conventional vehicle power converter, It is possible to prevent a leakage current from flowing through the floating capacitance existing between the box frames.
In the vehicle power converter configured as described above, even when the switching elements 13 manufactured by different manufacturers are accommodated, the units 9 can be made compatible by adjusting the number of the cores 11b. .
The power converter for a vehicle configured as described above can select the optimal number of cores 11 for the switching elements 13 mounted on the unit 9, and therefore can reduce the space required by the conventional power converter for a vehicle. Can be mounted in a small space. As a result, downsizing and weight reduction can be realized.
(Fourth embodiment)
A vehicle power converter according to a fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a configuration diagram of a power converter according to a fourth embodiment of the present invention. 1 to 3 are denoted by the same reference numerals, and description thereof is omitted.
[0013]
A vehicle power converter according to a fourth embodiment of the present invention includes a pantograph engaged with an overhead wire 1, a disconnector 3 serving as a switch, a disconnector 4, a charging resistor 5, and smoothing a current. Is electrically connected to the reactor 6. The power converter for a vehicle configured as described above includes a filter capacitor 7 for charging power, a three-phase bridge circuit 8, a detachable unit 9 in which the three-phase bridge circuit 8 is housed, and a core 11, and a load. 10 is connected.
In the power converter for a vehicle configured as described above, the first core group 11a is installed on the input side in the unit 9, and the second core group 11c is installed outside the unit 9.
In the power converter for a vehicle configured as described above, the core 11a housed inside the unit 9 uses a material having characteristics capable of maintaining stable inductance in a high-frequency region, and is installed outside the unit 9. 11c has a characteristic having a large inductance in a low frequency region. By blocking high frequencies that are likely to leak to the outside in the very vicinity and blocking low frequencies outside the unit, it is possible to more reliably reduce induction disturbance.
In the power converter for a vehicle configured as described above, the core 11a and the core 11c are provided only on the input side. Only expected. Therefore, it is preferably used when the system is a small system in which the load side of a motor or the like is closed and only reduction of radio noise from overhead lines and return lines is required.
[0014]
In the vehicle power converter configured as described above, by disposing the core 11b very close to the switching element 13 that is a noise source, the wiring and the device, which are problems in the conventional vehicle power converter, It is possible to prevent a leakage current from flowing through the floating capacitance existing between the box frames.
In the vehicle power converter configured as described above, even when the switching elements 13 manufactured by different manufacturers are housed, the units 9 can be made compatible by adjusting the number of the cores 11b. .
The power converter for a vehicle configured as described above can select the optimal number of cores 11 for the switching elements 13 mounted on the unit 9, and therefore can reduce the space required by the conventional power converter for a vehicle. Can be mounted in a small space. As a result, downsizing and weight reduction can be realized.
(Fifth embodiment)
A vehicle power converter according to a fifth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is a configuration diagram of a power conversion device according to a fifth embodiment of the present invention. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.
[0015]
A vehicular power converter according to a fifth embodiment of the present invention includes a pantograph engaged with an overhead wire 1, a disconnector 3 serving as a switch, a disconnector 4, a charging resistor 5, and smoothing a current. Is electrically connected to the reactor 6. The vehicular power converter configured as described above includes a filter capacitor 7 for charging power, a three-phase bridge circuit 8, a detachable unit 9 containing the three-phase bridge circuit 8 therein, and a core 11. .
In the vehicular power converter configured as described above, the first core group 11b is installed on the input side in the unit 9, and the second core group 11d is installed outside the unit.
In the power converter for a vehicle configured as described above, the core 11b housed inside the unit 9 uses a material having characteristics capable of maintaining a stable inductance in a high-frequency region, and is installed outside the unit 9. For 11d, a material having a large inductance in a low frequency region is used. By blocking high frequencies that are likely to leak to the outside in the very vicinity and blocking low frequencies outside the unit, it is possible to more reliably reduce induction disturbance.
In the vehicle power converter configured as described above, since the core 11b and the core 11d are provided only on the output side, the effect such as the reduction of the high-frequency current by the switching of the switching element 13 is provided only on the load side such as a motor. Can be expected. Therefore, it is preferable to use the high-frequency leakage current on the load side of the motor or the like when it is a major factor of the induction failure and the influence is small on the overhead line and the return side.
[0016]
In the vehicle power converter configured as described above, by disposing the core 11b very close to the switching element 13 that is a noise source, the wiring and the device, which are problems in the conventional vehicle power converter, It is possible to prevent a leakage current from flowing through the floating capacitance existing between the box frames.
In the vehicle power converter configured as described above, even when the switching elements 13 manufactured by different manufacturers are accommodated, the units 9 can be made compatible by adjusting the number of the cores 11b. .
The power converter for a vehicle configured as described above can select the optimal number of cores 11 for the switching elements 13 mounted on the unit 9, and therefore can reduce the space required by the conventional power converter for a vehicle. Can be mounted in a small space. As a result, downsizing and weight reduction can be realized.
In the vehicle power converters according to the fourth and fifth embodiments of the present invention, a core 11 having characteristics capable of maintaining a stable inductance in a high-frequency region is provided inside the unit 9. It is configured to be installed outside the unit 9 and to have a stable characteristic having a large inductance in a low frequency region. However, a core 11 capable of maintaining a stable inductance in a low frequency region is installed inside the unit 9. Alternatively, a configuration may be adopted in which a core 11 having characteristics capable of maintaining stable inductance in a high-frequency region is arranged outside the unit 9.
[0017]
In the present invention, it goes without saying that an induction motor, a synchronous motor, a commercial power supply load, or the like may be used as a load and be part of the configuration of the vehicle power converter.
[0018]
【The invention's effect】
According to the present invention, it is possible to provide a vehicular power conversion device that can ensure compatibility of units accommodating switching elements manufactured by different manufacturers and can reduce induction trouble.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a power conversion device according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a power converter according to a second embodiment of the present invention.
FIG. 3 is a configuration diagram of a power conversion device according to a third embodiment of the present invention.
FIG. 4 is a configuration diagram of a power conversion device according to a fourth embodiment of the present invention.
FIG. 5 is a configuration diagram of a power conversion device according to a fifth embodiment based on the present invention.
FIG. 6 is a configuration diagram of a conventional power converter.
FIG. 7 is a front view of a core.
FIG. 8 is a right side view of the core.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Overhead wire 2 ... Pantograph 3 ... Disconnector 4 ... Disconnector 5 ... Charge resistor 6 ... Reactor 7 ... Filter capacitor 8 ... Three-phase bridge circuit 9 Unit 10 Load 11 Core 12 Rail 13 Switching element

Claims (13)

A switching element for converting power,
A first core group provided on the input side in the vehicle power converter;
A second core group provided on the output side in the vehicle power converter,
Having
A power conversion device for vehicles. A switching element for converting power,
A core provided on the input side in the vehicle power converter,
Having
A power conversion device for vehicles. A switching element for converting power,
A core provided on the output side in the vehicle power converter,
Having
A power conversion device for vehicles. A switching element for converting power,
A first core group provided on the input side in the vehicle power converter;
A second core group provided on the input side outside the vehicle power converter,
Having
A power conversion device for vehicles. A switching element for converting power,
A first core group provided on an output side in the vehicle power converter,
A second core group provided on the output side outside the vehicle power converter,
Having
A power conversion device for vehicles. The vehicle power converter according to claim 5 or claim 6,
The first core group has a characteristic capable of maintaining a stable inductance in a high-frequency region, and the second core group has a characteristic capable of maintaining a stable inductance in a low-frequency region. Power conversion device for vehicles. The vehicle power converter according to claim 5 or claim 6,
The first core group has a characteristic capable of maintaining a stable inductance in a low frequency region, and the second core group has a characteristic capable of maintaining a stable inductance in a high frequency region.
A power conversion device for vehicles. A switching element for converting power,
A plurality of cores provided on the input side in the vehicle power converter,
A plurality of cores provided on the output side in the vehicle power converter,
Having
A power conversion device for vehicles. A switching element for converting power,
A plurality of cores provided on the input side in the vehicle power converter and penetrated by conductors or electric wires,
A plurality of cores provided on the output side in the vehicle power converter and penetrated by conductors or electric wires,
Having
A power conversion device for vehicles. A switching element for converting power,
A first core group provided on the input side in the vehicle power converter and penetrated by a conductor or an electric wire;
A second core group provided on the output side in the vehicle power converter and penetrated by a conductor or an electric wire;
Having
A power conversion device for vehicles. A switching element for converting power,
Having a core provided on the input side in the vehicle power converter and penetrated by a conductor or an electric wire,
A power conversion device for vehicles. A switching element for converting power,
A core provided on the output side in the vehicle power converter and penetrated by a conductor or an electric wire,
Having
A power conversion device for vehicles. A switching element for converting power,
A first core group provided on the input side in the vehicle power converter and penetrated by a conductor or an electric wire;
Having a second core group provided on the input side outside the vehicle power converter and penetrated by conductors or electric wires,
A power conversion device for vehicles.

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