JP6602633B2 - Power converter - Google Patents

Description

  Embodiments described herein relate generally to a power conversion apparatus.

  In a railway vehicle, a power conversion device that controls electric power supplied to a traveling motor may be attached under the floor of a vehicle body on which a passenger is placed. In such a power conversion device, it is necessary to install in consideration of the weight balance in the direction orthogonal to the traveling direction of the railway vehicle. However, in the conventional technology, it is possible to achieve both convenience and weight balance during maintenance work. There were cases where it was not possible.

JP 2015-116082 A

  The problem to be solved by the present invention is to provide a power converter that can achieve both convenience and weight balance during maintenance work.

The power conversion device of the embodiment includes a housing, a control device, a power conversion unit, and a detection device. The casing is attached to the bottom surface of the railway vehicle. The said control apparatus is attached to the 1st side regarding the direction orthogonal to the advancing direction of the said rail vehicle in the said housing | casing. The power conversion unit is attached to an intermediate portion of the housing in a direction orthogonal to the traveling direction of the railcar, and power supplied from the outside based on control of the control device is supplied to the travel motor of the railcar. It is converted into supplied power and output. The detection device is attached to a second side opposite to the first side with respect to a direction orthogonal to the traveling direction of the railcar in the casing, and detects a state of electric power in the power conversion unit. In the power conversion device according to the embodiment, the power conversion unit and the detection device can be taken out from a take-out port provided on the second side of the housing. The detection device is easier to remove than the control device.

The schematic diagram which looked at the railway vehicle 2 with which the power converter device 1 of embodiment is mounted from the side surface. The schematic diagram which looked at the rail vehicle 2 with which the power converter device 1 of embodiment is mounted from the front. The block diagram which shows the outline inside the power converter device 1 of embodiment. The circuit block diagram of the power converter device 1 of embodiment. The figure which shows the mode of the operation | work which takes out the AC / DC converter 112 and the DC / AC converter 114 from the housing | casing 100 in the power converter device 1 of embodiment.

  Hereinafter, the power converter of an embodiment is explained with reference to drawings.

  Drawing 1 is a mimetic diagram which looked at rail car 2 with which power converter 1 of an embodiment is carried from the side. Drawing 2 is a mimetic diagram which looked at rail car 2 with which power converter 1 of an embodiment is carried from the front. As shown in FIG. 1, the power conversion device 1 is disposed on the bottom 2 a side of the railway vehicle 2. Moreover, the power converter device 1 is arrange | positioned so that it may extend in the X direction orthogonal to the advancing direction (Y direction) of the rail vehicle 2, as shown in FIG. The power converter 1 is supplied with the overhead line power supplied from the current collector 3. The power conversion device 1 converts overhead power into three-phase alternating current and supplies it to the traveling motor 4. As a result, the power conversion device 1 causes the traveling motor 4 to generate torque and causes the railway vehicle to travel in the Y direction.

  Drawing 3 is a lineblock diagram showing an outline inside power converter 1 of an embodiment. The power conversion device 1 includes a box-shaped housing 100. The casing 100 is attached to the bottom 2a of the railway vehicle 2 with bolts or the like. The housing 100 includes a first housing portion 100A in which the power converters (112 and 114) are housed, a second housing portion 100B in which the control device 120 and the contactor 122 are housed, a detection device 132, and a power supply unit 134. A third housing portion 100C to be housed.

  100 A of 1st accommodating parts, the 2nd accommodating part 100B, and the 3rd accommodating part 100C are arranged in the railway vehicle 2 along with the direction (X direction) orthogonal to the advancing direction of the railway vehicle 2 in the housing | casing 100. FIG. Thereby, the control device 120 and the contactor 122, the power conversion devices (112 and 114), the detection device detection device 132, and the power supply unit 134 are in the direction orthogonal to the traveling direction of the railway vehicle in the housing 100, Arranged in order. That is, the control device 120 is attached to the first side (+ X direction side) in the casing 100 in the direction orthogonal to the traveling direction of the railway vehicle 2. The power converters (112 and 114) are attached to an intermediate portion in a direction perpendicular to the traveling direction of the railway vehicle 2 in the housing 100. The detection device 132 is attached to a second side (−X direction side) opposite to the first side with respect to the direction orthogonal to the traveling direction of the railway vehicle 2 in the housing 100. In addition, although the 1st accommodating part 100A, the 2nd accommodating part 100B, and the 3rd accommodating part 100C are not provided with the partition plate which divides each other accommodating part, you may provide a partition plate as needed.

  In the housing 100, the control device 120, the power conversion devices (112 and 114), and the detection device 120 are connected by a power line 1a and a signal line 1b. The power line 1a and the signal line 1b are supported by a guide (not shown) provided on the ceiling (100c) of the housing 100 and connected to other devices. Further, a resistance portion (R1) is installed near the ceiling portion of the housing 100. The resistance unit (R1) is connected to the power converters (112 and 114) via the power line 1a.

  Note that a mounting portion (not shown) that is bolted to the bottom portion 2a of the railway vehicle 2 is formed in the first housing portion 100A, the second housing portion 100B, and the third housing portion 100C. When the railway vehicle 2 travels, the bottom surface 100f of the housing 100 faces the bottom 2a of the railway vehicle 2, and the mounting portion and the bottom 2a of the railway vehicle 2 are fixed by bolts.

  The second side surface 100e of the housing 100 is provided with a cowl cover 100E that is supported so as to be opened and closed by a hinge mechanism provided on the + Z direction side (upper side). The cowl cover 100E is opened or removed when the detection device 132, the power supply unit 134, the AC / DC conversion device 112, and the DC / AC conversion device 114 are removed from the housing 100. Thereby, the 2nd side surface 100e is made into an open state as the taking-out port 100D of a power converter part (112 and 114). A cowl cover that is supported so as to be opened and closed may also be provided on the first side of the housing 100. The cowl cover on the first side is opened or removed when performing maintenance work on the control device 120 and the control fan 122, for example.

  For example, AC / DC converter 112, DC / AC converter 114, and overvoltage suppressing resistor R1 are mainly housed in first housing portion 100A, for example. The AC / DC conversion device 112 and the DC / AC conversion device 114 are placed on the bottom surface 100f of the first housing portion 100A. Note that the AC / DC conversion device 112 and the DC / AC conversion device 114 include heat radiation fins below, and project the heat radiation fins from the holes formed in the bottom surface 100f. The AC / DC converter 112 and the DC / AC converter 114 have a box having a long side in a direction orthogonal to the traveling direction of the railway vehicle 2 and are arranged side by side in the traveling direction (Y direction) of the railway vehicle 2. The

  The AC / DC conversion device 112 and the DC / AC conversion device 114 are housed in the first housing portion 100A in an easily removable state. “Accommodated in an easily removable state” means that the AC / DC conversion device 112 and the DC / AC conversion device 114 are in a state where the casing 100 is fixedly attached to the bottom 2a of the railcar 2 with bolts or the like. The AC / DC converter 112 and the DC / AC converter 114 that have been detached from the housing 100 and can be removed from the outlet 100D. The AC / DC conversion device 112 and the DC / AC conversion device 114 may be placed on the lift carriage 200 and taken out from the takeout port 100D as will be described later, and are slid by a rail provided in the housing 100 in advance. May be taken out from the take-out port 100D.

  The AC / DC converter 112 is connected to the second storage unit 100B and the third storage unit 100C via the power line 1a and the signal line 1b while being stored in the first storage unit 100A. The AC / DC converter 112 is connected to a gate substrate (not shown) through the signal line 1b. For example, the gate substrate is replaced by a maintenance person through a work window 112e formed in the first housing 100A as shown in FIG. Furthermore, the AC / DC conversion device 112 is connected to the DC / AC conversion device 114 via the power line 1a (intermediate link) while being accommodated in the first accommodation unit 100A.

  The DC / AC converter 114 is connected to the second storage unit 100B and the third storage unit 100C via the power line 1a and the signal line 1b in a state of being stored in the first storage unit 100A. The DC / AC converter 114 is connected to the gate substrate through the signal line 1b. The gate substrate is exchanged by a maintenance person through a work window formed in the housing 100. The first housing portion 100A is provided with an output connector (not shown) connected to the traveling motor 4, and supplies AC power output from the DC / AC converter 114 to the power cable.

  For example, the control device 120 and the contactor 122 are mainly housed in the second housing portion 100B.

  The control device 120 is connected to the first storage unit 100A and the third storage unit 100C via the signal line 1b in a state where it is installed in the second storage unit 100B. The control device 120 is supplied with an operation signal corresponding to the driving operation of the railway vehicle 2, and outputs a control signal based on the operation signal to the first accommodating portion 100A via the signal line 1b.

  The contactor 122 is attached to the 2nd accommodating part 100B. The contactor 122 is connected to the first housing portion 100A via the power line 1a in a state where it is installed in the second housing portion 100B. Furthermore, the contactor 122 is connected to the control device 120 via the signal line 1b. The contactor 122 is supplied with electric power from the current collector 3 and supplies electric power to the first housing part 100A via the electric power line 1a.

  For example, the detection unit 132 and the power supply unit 134 are mainly stored in the third storage unit 100C, for example. The detection device 132 is placed on the lower side of the third housing portion 100 </ b> C, and the power supply unit 134 is arranged on the upper side of the detection device 132. The detection device 132 is connected to the second housing portion 100B via the signal line 1b, and is connected to the first housing portion 100A via the power line 1a. Further, the power supply unit 134 supplies a driving voltage for opening and closing the switching elements in the AC / DC converter 112 and the DC / AC converter 114.

  The detection device 132 and the power supply unit 134 are accommodated in the third accommodating portion 100C in an easily removable state. “Accommodated in an easily removable state” means that the maintenance device detaches the detection device 132 and the power supply unit 134 in a state in which the casing 100 is fixedly attached to the bottom 2a of the railway vehicle. Further, the detection device 132 and the power supply unit 134 are accommodated in a state that is easier to remove than the control device 120. “Easy to remove” may mean that there are fewer bolts to release the connection than the control device 120, and because there are fewer wires connected than the control device 120, the detection device 132 and the power supply unit 134 It may mean that there is little time and effort for removal. Further, since the detection device 132 and the power supply unit 134 are lighter in weight than the control device 120, they are easy to handle and easy to remove.

  The detection device 132 and the power supply unit 134 are removed from the third housing portion 100C when the AC / DC conversion device 112 and the DC / AC conversion device 114 are removed from the first housing portion 100A. When the detection device 132 and the power supply unit 134 are removed, the AC / DC conversion device 112 and the DC / AC conversion device 114 are visible from the take-out port 100D of the housing 100. When the detection device 132 and the power supply unit 134 are removed, the heat radiation fins 112d and 114d disposed below the AC / DC conversion device 112 and the DC / AC conversion device 114 are also visible.

  FIG. 4 is a circuit configuration diagram of the power conversion device 1 according to the embodiment. The power conversion device 1 includes a transformer TRS, a control device 120 and a contactor 122 accommodated in the second accommodation unit 100B, an AC / DC conversion device 112 and a DC / AC conversion device accommodated in the first accommodation unit 100A. 114, an overvoltage suppressing resistor R1, and a detection device 132 and a power supply unit 134 housed in the third housing portion 100C. For example, a notch command based on the operation state is transmitted to the control device 120 from a master controller operated by the driver.

  The transformer TRS transforms the AC power supplied from the current collector 3 and supplies it to the contactor 122. The contactor 122 supplies the AC power supplied from the transformer TRS to the AC / DC converter 112 of the first housing unit 100A in accordance with the control signal transmitted by the controller 120.

  A filter capacitor C and an overvoltage suppressing resistor R1 are connected in parallel to the AC / DC converter 112 and the DC / AC converter 114. AC power is supplied to the AC / DC converter 112 via the contactor 122. The AC / DC conversion device 112 operates the switching element according to the control of the control device 120 to convert the overhead power into DC power having a predetermined voltage and supplies the DC power to the DC / AC conversion device 114. The DC / AC converter 114 includes a switching element that generates electric power of each phase in the traveling motor 4. The DC / AC converter 114 converts a DC voltage into a three-phase AC voltage having an arbitrary voltage and an arbitrary frequency by arbitrarily switching (ON) and blocking (OFF) the switching element. Each switching element is, for example, an IGBT (insulated gate bipolar transistor) including a diode connected in antiparallel.

  The filter capacitor C is connected in parallel between the output terminal of the AC / DC converter 112 and the input terminal of the DC / AC converter 114. The filter capacitor C suppresses ripple fluctuation of the DC power supplied from the AC / DC converter 112 to the DC / AC converter 114.

  An overvoltage suppressing resistor R1 is connected to the DC / DC converter 112 and the DC / AC converter 114. A switch SW is connected in series to the overvoltage suppressing resistor R1. The overvoltage suppressing resistor R1 and the switch SW are connected in parallel to the filter capacitor C. The switch SW conducts when a control signal is input from the control device 120, suppresses the overvoltage via the overvoltage suppression resistor R1, and protects the DC / DC conversion device 112 and the DC / AC conversion device 114.

  The control device 120 comprehensively controls each unit in the power conversion device 1. The control device 120 functions, for example, when a processor such as a CPU (Central Processing Unit) executes a program stored in a storage unit (not shown). The control device 120 may have hardware such as an LSI (Large Scale Integration) or an ASIC (Application Specific Integrated Circuit). The control device 120 causes the contactor 122 to conduct and supplies a PWM command to the gate substrate of the AC / DC conversion device 112 and the DC / AC conversion device 114. As a result, the gate voltage supplied from the power supply unit 134 to the DC / DC converter 112 and the DC / AC converter 114 turns on and off the gate of the switching element based on the PWM command, and causes the traveling motor 4 to supply AC power. Moreover, the control apparatus 120 stops operation | movement of the power converter device 1, for example, when abnormality, such as an overvoltage or a ground fault, is detected by the detection apparatus 132. FIG.

  The overvoltage suppressing resistor R1 may be connected in parallel to the AC / DC converter 112 and the DC / AC converter 114. In the overvoltage suppressing resistor R1, the switch SW is connected in series, and when the switch SW is turned on, a current flows and suppresses the overvoltage. The voltage detection unit is provided in the detection device 132, for example, and detects the voltage between the AC / DC conversion device 112 and the DC / AC conversion device 114. The detection device 132 detects an overvoltage by comparing the voltage detected by the voltage detection unit with a threshold value. Further, the detection device 132 may detect an abnormality such as a ground fault of the power line 1a in the power conversion device 1.

  Hereinafter, the process of removing the AC / DC converter 112 and the DC / AC converter 114 in the power converter 1 of the embodiment will be described. FIG. 5 is a diagram illustrating an operation of taking out the AC / DC conversion device 112 and the DC / AC conversion device 114 from the housing 100 in the power conversion device 1 according to the embodiment. The upper diagram in FIG. 5 is a diagram illustrating a state in which the detection device 132 and the power supply unit 134 are removed from the housing 100, and the lower diagram in FIG. 5 is the DC / DC conversion device 112 and the DC / AC conversion device 114 in the housing 100. It is a figure which shows a mode that it takes out from.

(1) First, the cowl cover 100E of the third housing portion 100C is opened, and the detection device 132 and the power supply unit 134 are removed from the third housing portion 100C. As a result, the AC / DC converter 112 and the DC / AC converter 114 can be visually recognized from the extraction port 100D.
(2) Next, the intermediate link connecting the AC / DC converter 112 and the DC / AC converter 114 is removed, and the power line 1a and the signal line 1b are removed from the AC / DC converter 112 and the DC / AC converter 114. . As a result, the AC / DC converter 112 and the DC / AC converter 114 can be separately taken out.
(3) Next, as shown in the lower diagram of FIG. 5, the roller 200b of the lift carriage 200 is disposed below the AC / DC converter 112 and the DC / AC converter 114, and the AC / DC converter 112 and the DC / DC The AC conversion device 114 is lifted upward from the bottom surface 100f. At this time, in the AC / DC conversion device 112 and the DC / AC conversion device 114, the heat radiation fins 112d and 114d are lifted from the hole below the housing 100 to the bottom 2a side of the railway vehicle.
(4) Next, as shown in the lower diagram of FIG. 5, in a state where the AC / DC converter 112 and the DC / AC converter 114 are lifted, the DC / DC converter 112 and the DC / AC converter 114 The AC / DC converter 112 and the DC / AC converter 114 are taken out by moving in the removal direction while being placed on the support base 200a of the lift carriage 200.

  In the power conversion device 1 according to the embodiment described above, the control device, the power conversion device, and the detection device are arranged in this order from the first side to the second side in the direction orthogonal to the traveling direction of the railcar 2. Since the power conversion device and the detection device are configured to be extracted from the second-side extraction port 100D, the power conversion device can be easily extracted, and convenience during maintenance work can be improved. Moreover, according to the power converter device 1 of the embodiment, since the control device, the power converter device, and the detection device are arranged in this order, the power converter device is arranged in the middle of the direction orthogonal to the traveling direction of the railway vehicle 2. Thus, the weight balance of the power converter 1 can be improved. As a result, according to the power conversion device 1 of the embodiment, it is possible to achieve both convenience and weight balance during maintenance work.

  Moreover, according to the power converter device 1 of the embodiment, since the control device 120 is attached to the housing 100 on the first side in the direction orthogonal to the traveling direction of the railcar 2, the maintenance work is performed on the power converter device. At this time, it is not necessary to remove the control device, and convenience during maintenance work can be improved.

  According to at least one embodiment described above, the housing 100 attached to the bottom surface of the railway vehicle 2 and the control device attached to the first side in the direction perpendicular to the traveling direction of the railway vehicle 2 in the housing 100 ( 120), a power conversion unit (112 and 114) attached to an intermediate portion in a direction orthogonal to the traveling direction of the railcar 2 in the casing 100, and a direction orthogonal to the traveling direction of the railcar 2 in the casing 100. The power conversion device and the detection device are taken out from a take-out port 100D provided on the second side of the housing 100. The detection device (134) is attached to the second side opposite to the first side. Therefore, it is possible to achieve both convenience and weight balance during maintenance work.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Power converter device, 2 ... Railway vehicle, 4 ... Motor for driving | running | working, 100 ... Case, 100A ... 1st accommodating part, 100B ... 2nd accommodating part, 100C ... 3rd accommodating part, 100D ... Extraction port, 100f ... Bottom surface, 112 ... AC / DC converter, 112d ... fin for heat dissipation, 114 ... DC / AC converter, 120 ... control device, 122 ... contactor, 132 ... detector, 134 ... power supply unit, 200 ... lifting carriage

Claims (2)

A housing attached to the bottom of the railway vehicle;
A control device attached to a first side in a direction perpendicular to a traveling direction of the railcar in the housing;
Attached to an intermediate portion of the housing in a direction orthogonal to the traveling direction of the railway vehicle, the electric power supplied from the outside is converted into electric power supplied to the traveling motor of the railway vehicle based on the control of the control device. Output power converter,
A detection device that is attached to a second side opposite to the first side with respect to a direction orthogonal to the traveling direction of the railcar in the housing, and that detects a state of power in the power conversion unit;
The power conversion unit and the detection device, Ri can der taken out from the takeout port provided in said second side of said housing,
The detection device is easier to remove than the control device,
Power conversion device. The power conversion unit includes a heat dissipation fin on the bottom side of the railcar,
The housing is provided with a hole for projecting the heat dissipating fin to the bottom side,
The power conversion unit is taken out from the casing in a state where the fins for heat dissipation are lifted from the hole part to the bottom surface side of the railway vehicle.
The power conversion device according to claim 1.

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