JPH0361876A - Lightning surge generator - Google Patents

Abstract

PURPOSE:To perform switching of output waveforms readily and positively by imparting waveform switching instruction data from an input device, opening and closing relay switches with a central processing unit, and setting the output waveform. CONSTITUTION:When a lightning surge waveform is imparted, the objective surge waveform is retrieved from an image file 26 and displayed on a display device 21. With the combination data being observed, the required data are inputted from an input device 22. When the lightning surge having the waveform A2 is outputted at this time, a combination for RS1, RS3 and RS6 at an address a2 is instructed. Thus, the connection of required capacitors, coils and resistors is prearranged. A CPU 15 selectively opens and closes switches by using relay driving circuits and determines the lightning surge waveform to be outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lightning surge generator used to test the tolerance of electronic equipment to noise.

[Conventional technology] Advances in electronic technology have led to miniaturization and improved packaging density of components for communication equipment and control equipment. Damage such as destruction is increasing. Lightning surge (SUR)
GE) refers to voltage/current that fluctuates violently in a short period of time, and is transient and non-reproducible.

In order to prevent malfunctions, breakdowns, and destruction of electronic equipment caused by lightning surges, it is important to take circuit measures on the electronic equipment side. It is necessary to investigate in detail the different effects that each waveform has on the equipment. Conventionally, in order to test the tolerance of each waveform of electronic equipment to lightning noise, a third
The lightning surge generator shown in the figure was used.

The high voltage HV generated in the high voltage power supply section 1 is charged to the capacitor section 4 via the discharge/charge relay 3 of the waveform setting section 2, and the discharge/charge relay 3 is switched to transfer the charged charge to the discharge coil section 5 and the discharge coil section 5. Electricity is applied to a long voltage-resistant cable (not shown) via the resistance section 6, and a discharge occurs between the discharge electrode and the test object.

The capacitor section 4 is provided with capacitors C1 and C2, the coil section 5 is provided with coils L1 and L2, and the discharge resistor section 6 is provided with resistors R1 and R2, respectively. Capacitor C1
, C2 with switch S1 or S2, one of coils LL and L2 with switch S3 or S4, and one of resistors R1 and R2 with switch S5 or S6. Surge waveform characteristics are set. The structure of the switches 81 to S6 that perform this selection and combination is as shown in FIG.

In FIG. 4, a pair of metal terminals 7 are placed on the insulator substrate A.
．． 8 are provided, and a metal connection plate 9 is removably screwed to these metal terminals 7.8. For example, to bring the switch S1 into the connected state, the large-capacity current-carrying connection plate 9 is manually engaged with the terminal 7.8, and then fixed by tightening with a screw or the like.

[Problems to be Solved by the Invention] However, in conventional lightning surge generators, it is necessary to manually remove and attach the connecting plate every time the output waveform is switched, but this method does not solve the problem due to residual high voltage. There is a danger that the worker may come into contact with it, which poses a safety problem, and it also has the disadvantage of psychologically creating a sense of fear in the worker.

Further, an electric shock prevention mechanism is attached around the connection plate, and the installation process is time-consuming and complicated.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a lightning surge generator that can reliably, easily and safely change the surge waveform.

[Means for Solving the Problems] In the present invention, a high voltage power supply unit that generates a high voltage;
A plurality of capacitors are charged with this high voltage, a plurality of discharge coils and a plurality of discharge resistors are energized with the charged high voltage, and these capacitors, coils, and resistors are selectively opened and closed electronically. A relay switch to be connected, a central control device that controls the relay switch to selectively connect multiple capacitors, coils, and resistors, and a surge control device that is controlled by the central control device and corresponds to the connection combination of the capacitors, coils, and resistors. A read-only memory in which waveform data is stored, a display device from which the surge waveform data is retrieved and displayed, and an input device for inputting a connection combination of a capacitor, coil, and resistor that generates a desired surge waveform are provided. .

[Operation] The surge waveform data is called and displayed on the display device, and the desired surge waveform is determined. The connection combination of capacitor, coil, and resistor that generates the desired surge waveform is input from the input device. Relay switches are then controlled by the central controller to open and close, selectively connecting capacitors, coils, and resistors.

When a high voltage is applied to these coils and resistors from a high-voltage power source and discharged between the discharge electrode and the test object via a voltage-resistant cable, the discharge occurs in a desired surge waveform.

[Example] The present invention will be explained below based on the drawings.

The high voltage HV generated in the high voltage power supply section 1 is charged to the capacitor section 4 via the discharging/charging relay 3 of the waveform setting section 12,
By switching the discharging/charging relay 3, the charged electric charge is transferred to the voltage-resistant cable 1 via the discharging coil section 5 and the discharging section resistance section 6.
7 and discharge from the discharge electrode to the test object.

The capacitor section 4 is provided with capacitors C1 and C2, the coil section 5 is provided with coils L1 and L2, and the discharge resistor section 6 is provided with resistors R1 and R2, respectively. capacitor ci
, C2 is connected to switch R3I or RS2, and one of coils Ll and L2 is connected to switch R33 or RS.
4, one of the resistors R1 and R2 is selected as closed by the switch R55 or R86, and by combining these, the waveform characteristics of the lightning surge are set.

Switches R5l-R56 for performing this selection and combination are sealed relay switches, and are constructed of high-voltage, large-current mercury relays.

The high voltage power supply unit 1 and the waveform setting unit 12 are connected to a central control unit (hereinafter referred to as C
A relay drive circuit 18-20, a display device 21, an input device 22, and a read-only memory (ROM) 23 are connected to the CPU 15.

The relay drive circuit 18 selectively opens and closes the switches R3I and RS2, the relay drive circuit 19 selectively opens and closes the switches RS3 and RS4, and the relay drive circuit 20 selectively opens and closes the switches RS5 and RS6.

The display device 21 consists of a CRT, etc., and displays the contents of the ROM 23, and the input device 22 consists of a keyboard, etc., and displays the contents of the ROM 23.
23, and make settings for waveform selection.

As shown in FIG. 2, the ROM 23 includes a combination file 25, an image file 26, and a waveform data file 27.

The combination file 25 includes waveforms Al, A2°A3. −・
---, addresses al, a2. a3゜・・・・・・
According to the above, the combination of switches R5l-R56 is recorded in advance. The combinations of switches RSI to RS6 correspond to the connection combinations of capacitors, coils, and resistors.

The image file 26 includes each waveform At, A2°A3.・・・
. . , and numerical values such as peak values, peak times, wave widths, etc. are recorded in advance in the waveform data file 27.

When generating a lightning surge, as shown in FIG. 2, the target surge waveform is called from the image file 26 and displayed on the display device 21 to visually confirm the type.

Next, switches RS1 to R36 that provide the surge waveform are
The combination is read from the combination file 25 and displayed on the display device 21. While looking at this combination data, necessary data is input from the input device 22.

Now, if you want to output a lightning surge with waveform A2, address a
2 combinations R3I, R63, and R36. As a result, the connection of the capacitor C1, coil L1, and resistor R2 is scheduled. The CPU 15 selectively opens and closes the switches R81 to RS6 using the relay drive circuits 18 to 20, and determines the lightning surge waveform to be output.

In this way, the high voltage HV generated in the high voltage power supply section 1 is charged to the waveform setting section 12, and the discharging/charging relay 3 is switched.
The voltage-resistant cable 17 is energized with the set surge waveform, and a discharge is caused between the discharge electrode and the test object, and the set surge waveform is repeatedly applied to the electronic equipment to examine in detail the different effects of each waveform.

[Effects of the Invention] As explained above, according to the present invention, waveform switching instruction data is given from the input device and the central control unit (C
Since the output waveform is set by opening and closing the relay switch using the PU), the output waveform can be easily and reliably switched.

Also, since you don't have to touch parts that are charged with high voltage,
It is safe and has the effect of allowing various tests to be carried out with peace of mind.

[Brief explanation of drawings]

Figure 1 is an overall configuration diagram of the lightning surge generator of the present invention, Figure 2 is a configuration diagram of the ROM of the present invention, Figure 3 is a conventional configuration diagram, and Figure 4
The figure is a perspective view of a conventional switch. 1...High voltage power supply part, 3...Switching relay 4...Capacitor part, 5...Coil part, 6...
...Discharge resistance section, 12...Waveform setting section, 15
...CPU, 17...Voltage resistant cable, 18-20...Relay drive circuit, 21...CRT, 22...Input device,
23...ROM. 25...Combination file, 26...Image file, 27...Waveform data file, C1, C2...Capacitor, LL, L2...Coil, 1 R2...Discharge resistance. Figure-12 21CF? T Figure 3 2

Claims (1)

[Claims] A high-voltage power supply unit that generates a high voltage, a plurality of capacitors that are charged with this high voltage, a plurality of discharge coils and a plurality of discharge resistors that are energized with the charged high voltage, and a plurality of these A lightning surge generator is provided with a switch that selectively connects the capacitors, coils, and resistors, wherein the switch is a relay switch that is opened and closed electronically, and the relay switch is controlled to connect the plurality of capacitors, a central controller for selectively connecting coils and resistors; a read-only memory that is controlled by the central controller and stores surge waveform data corresponding to connection combinations of the plurality of capacitors, coils, and resistors; and the surge waveform. A lightning surge generator comprising: a display device for reading and displaying data; and an input device for inputting a connection combination of a capacitor, a coil, and a resistor to generate a desired surge waveform.