WO2016027916A1

WO2016027916A1 - Capacitor exchange type gate drive apparatus

Info

Publication number: WO2016027916A1
Application number: PCT/KR2014/007930
Authority: WO
Inventors: 김성준
Original assignee: 한국철도공사
Priority date: 2014-08-21
Filing date: 2014-08-26
Publication date: 2016-02-25
Also published as: KR101547676B1

Abstract

The present invention relates to a capacitor exchange type gate drive apparatus for detachably manufacturing a capacitor module of a gate drive so as to drive a large-capacity semiconductor in an electric railway vehicle, the apparatus comprising: a driver PCB in which a connection socket is provided at the upper part thereof; a capacitor PCB in which a capacitor is provided at the upper part thereof, and a connection pin electrically connected to the connection socket is provided at the lower part thereof so as to be detachably provided at the driver PCB; and a gate control unit for receiving a smoothened signal through the capacitor PCB so as to switch a power semiconductor on/off. According to the capacitor exchange type gate drive apparatus of the present invention, a plurality of parallel connected electrolytic capacitor modules forming a gate drive for driving a large-capacity semiconductor in an inverter driving type electric railway vehicle, is detachably manufactured such that only the electrolytic capacitor modules can be exchanged without exchanging the entire gate drive when the lifetime of the electrolytic capacitor ends or deterioration occurs in the electrolytic capacitor, and thus a failure can be prevented, in advance, by regularly and periodically measuring and diagnosing the lifetime of a electrolytic capacitor and enabling the precise maintenance and repair thereof, thereby reducing maintenance and repair costs.

Description

Capacitor Exchangeable Gate Drive Device

The present invention relates to a capacitor exchange type gate drive device, and more particularly, to a capacitor exchange type gate drive device for detachably manufacturing a capacitor module of a gate drive for driving a large capacity semiconductor of an electric railway vehicle.

Recently, electric vehicles using electric power are mainly composed of electric vehicles, and with the development of advanced semiconductor technology, various types of power conversion devices for supplying power and power necessary for the operation of railway vehicles through electric and electronic control of microprocessors. Is being used.

The most representative device is a large-capacity propulsion control device, the control component is a modular device of the PCB type.

However, most of the key devices constituting the large-capacity propulsion control device are foreign products, and have a high level of stability. However, the core technologies are exclusively managed and are in a difficult technical accessibility.

In addition, the inverter device for converting the power required to drive the electric railway vehicle to supply to the traction motor is composed of a control computer, a control unit, a large-capacity power semiconductor for propulsion control.

Such an inverter device is a component corresponding to an engine of an automobile. In order to drive a large capacity power semiconductor, the inverter uses a part called a gate drive for fast switching ON / OFF the gate for a very short time.

The core component of the gate drive uses a number of parallel electrolytic capacitors to make the smoothed ON / OFF voltage. The electrolytic capacitors have a service life and cannot be started due to changes in mechanical and electrical characteristics due to heat generation during switching. There was a problem affecting the performance of the electric railway vehicle.

In addition, electrolytic capacitors are mounted on the PCB, so accurate capacity or life cannot be measured, making it difficult to predict the life due to deterioration. .

In addition, the use of a plurality of parallel capacitors is difficult to replace, and after a new defect must be replaced, but there is a problem that the replacement cost is difficult because the supply of foreign parts is difficult to supply.

[Preceding technical literature]

(Patent Document 1) Republic of Korea Patent Registration No. 10-0924924

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the detachable manufacture of a plurality of parallel-connected electrolytic capacitor modules constituting a gate drive for driving a large-capacity semiconductor of an inverter-driven electric railway vehicle leads to the lifetime of the electrolytic capacitor. The electrolytic capacitor module can be replaced without replacing the entire gate drive in case of time or deterioration, so that the life time of the electrolytic capacitor can be measured and diagnosed and the correct maintenance can be prevented in advance, thereby preventing the maintenance cost. To provide a capacitor-switched gate drive device that can reduce the cost.

Capacitor interchangeable gate drive device of the present invention for achieving the above object is a driver PCB having a connection socket on the top; A capacitor PCB provided at an upper portion thereof and a connecting pin electrically connected to the connection socket at a lower portion thereof, the capacitor PCB detachably provided at the driver PCB; And a gate controller for switching the power semiconductor by receiving the smoothed signal through the capacitor PCB.

The connection socket may be provided with a fixing part formed with a screw groove inside.

The capacitor PCB may have a through hole formed at a position corresponding to the fixing part.

The driver PCB and the capacitor PCB may be coupled to each other through a fastening means introduced into the through hole and fastened to the fixing part.

The capacitor may be provided as an electrolytic capacitor, and a plurality of electrolytic capacitors may be connected in parallel.

When driving the converter, 7 pulses of linear waves are output for 16.7 ms, and when driving the inverter, 5 pulses of linear waves are output for 16.7 ms to turn on or off the power semiconductors, respectively.

According to the capacitor exchange type gate drive device of the present invention as described above, a plurality of parallel-connected electrolytic capacitor module constituting a gate drive for driving a large capacity semiconductor of an inverter driving type electric railway vehicle is manufactured to be detachable, electrolytic capacitor When the lifespan or degradation occurs, only the electrolytic capacitor module can be replaced without replacing the entire gate drive. Therefore, the life of the electrolytic capacitor can be measured and diagnosed regularly and accurate maintenance can be prevented. There is an effect to reduce the maintenance cost.

1 is a block diagram showing a power converter according to an embodiment of the present invention,

2 is a block diagram illustrating a capacitor exchangeable gate drive device according to an embodiment of the present invention.

Figure 3 is a perspective view showing a separation module unit according to an embodiment of the present invention,

4 is an exemplary view showing a capacitor PCB constituting the separation module unit according to an embodiment of the present invention,

5 is an exemplary view showing a driver PCB constituting the separation module unit according to an embodiment of the present invention,

6 is a perspective view illustrating a coupling relationship between a capacitor PCB and a driver PCB according to an embodiment of the present invention.

7 is a graph illustrating output waveforms through a gate drive according to an exemplary embodiment of the present invention.

[Description of the code]

111: capacitor PCB 113: capacitor

115: connection pin 117: driver PCB

118: connection socket 150: gate control unit

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

As shown in FIG. 1, the gate drive according to the exemplary embodiment of the present invention is provided in the converter unit 30 and the inverter unit 50 of the propulsion control device. In the case of converting the power supply to the inverter unit 50 by converting the DC power through the converter unit 30 through the transformer 10, and converts to an alternating current through the inverter unit 50 at the time of direct current to the electric motor 70 Drive it.

Two converter units 30 are configured in parallel to drive power semiconductors with a total of eight gate drives 100 called GA85A, and an inverter unit 50 is composed of six gate drives 100 for power semiconductors. Drive.

As shown in FIG. 2, the inverter unit 50 has a square wave of 55.6V and 50KHz, which is converted into AC power through the DA converter 200 by receiving a DC power of 100V as a gate driving circuit of the power semiconductor. The power is smoothed using a plurality of parallel electrolytic capacitors provided in the separation module unit 110 through the gate drive 100, and the power semiconductor is shortened through a gate control optical signal according to the signal smoothed by the gate controller 150. Switch for time.

The gate drive 100 is provided in a propulsion control module, which is called an inverter device, and is modularly mounted on the outer lower portion of the railway vehicle.

As shown in FIG. 3, the separation module unit 110 includes a driver PCB 117 and a capacitor PCB 111 detachably coupled to the driver PCB 117.

As shown in FIG. 4, the capacitor PCB 111 includes a capacitor 113 at an upper portion thereof, and a connection pin 115 electrically connected to the connection socket 118 at the lower portion thereof.

As shown in FIG. 5, the driver PCB 117 is provided with a connection socket 118 at an upper portion thereof, and a plurality of fixing portions 119 having screw grooves formed therein around the connection socket 118.

As shown in FIG. 6, the capacitor PCB 111 may be detachably provided to the driver PCB 117 through the connection socket 118 and the connection pin 115.

The capacitor 113 is provided as an electrolytic capacitor, and a plurality of electrolytic capacitors are connected in parallel.

In addition, the capacitor PCB 111 has a through hole 116 formed at a position corresponding to the fixing part 119.

The driver PCB 117 and the capacitor PCB 111 may be firmly coupled to each other by inserting a fastening means such as a bolt or a screw into the through hole 116 to be fastened to the fixing unit 119.

As shown in FIG. 7, the gate drive 100 according to the present invention outputs 7 pulses of linear waves for 16.7 ms when the converter is driven (see upper graph), and generates 5 pulses of linear waves for 16.7 ms when the inverter is driven. Output (see bottom graph) to switch the large-capacity power semiconductors on or off respectively.

As described above, the separation module unit 110 constituting the gate drive 100 according to the present invention manufactures a capacitor PCB 111 having an electrolytic capacitor as a separate type, and then separates only the capacitor PCB 111 to measure capacitance. This ensures accurate replacement life and reduces accidental failures.

Even in the event of failure of the gate drive 100, the fastening means is separated from the fixing part 119, and then the connection pin 115 of the capacitor PCB 111 is separated from the connection socket 118 so that precision and skill are not required. You can proceed with the exchange.

Therefore, since only the capacitor PCB 111 can be partially exchanged in the gate drive 100, a large failure can be prevented in advance, and accordingly, the maintenance cost can be reduced in safe operation of the railway vehicle and operation of the railway vehicle.

In addition, by localizing the gate drive 100, it is expected to be easy to measure and diagnose from the point of view of the railroad operator, and the management improvement effect will be great due to the drastic reduction of the maintenance cost. Is possible.

For reference, in the case of inverter-driven electric railcars, for example, 5 propulsion control devices are installed per 10-car train in the Seoul Metropolitan Subway (Train), and 14 gate drives are used in total, 70 in total. do.

Since the unit price of foreign products is about 3,000,000 won per unit, it takes 210,000,000 won in total, but the gate drive according to the present invention is about 700,000 won per unit, thus reducing the total cost by 75% to 49,000,000 won. There is a savings of about 90%, which is about 97.5% savings compared to new foreign replacement costs.

In the above description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto, and a person having ordinary skill in the art to which the present invention pertains does not depart from the technical spirit of the present invention. It will be readily appreciated that various substitutions, modifications and variations can be made.

The present invention can replace the domestic parts of large-capacity semiconductor drive of the propulsion control device, which is a core component of the electric railway vehicle, with localized parts, and easy to measure and diagnose from the point of view of the railroad operator, and improve the management by drastically reducing the maintenance cost. The effect is expected to be great, and it is possible to apply related technology to overseas expansion and industrial fields related to railway.

Claims

A driver PCB having a connection socket at the top;

A capacitor PCB provided at an upper portion thereof and a connecting pin electrically connected to the connection socket at a lower portion thereof, the capacitor PCB detachably provided at the driver PCB; And

A gate controller for switching a power semiconductor by receiving a smoothed signal through the capacitor PCB

Capacitor interchangeable gate drive device comprising a.
The method of claim 1, wherein the capacitor socket-type gate drive device, characterized in that the fixing portion is formed with a screw groove on the inner side around the connection socket.
3. The capacitor interchangeable gate drive device of claim 2, wherein a through hole is formed in the capacitor PCB at a position corresponding to the fixing part.
4. The capacitor exchange type gate drive device of claim 3, wherein the driver PCB and the capacitor PCB are coupled to each other through a fastening means introduced into the through hole and fastened to the fixing unit.
The method of claim 1, wherein the capacitor is provided with an electrolytic capacitor, a capacitor exchange type gate drive device, characterized in that a plurality of electrolytic capacitors are connected in parallel provided.
The capacitor switched gate of claim 1, wherein a linear pulse of 7 pulses is output during a driving time of 16.7 ms, and a linear pulse of 5 pulses is output during a driving time of an inverter of 16.7 ms, respectively. Drive device.