KR100308742B1 - Separation device to EMI noise ingredient - Google Patents

Abstract

The present invention relates to an electromagnetic noise component separation device,

In the case of including a pseudo power supply network (1) for detecting the noise generated from the load and output through the output terminals (1L) (2L),

First and second switches (10) (11) for switching in accordance with an input switching control signal to switch the noise output through the output terminals (1L) and (2L) in three stages (a, b, c);

The first and second coils L1 and L2 on the primary side are connected to one terminal of the first and second switches 10 and 11, and the signal input to the primary coils L1 and L2 on the secondary side. A transformer T1 which is induced and output to the third coil L3;

A third switch 12 that operates according to a set noise component separation mode and operates so that the polarity of the second coil L2 of the transformer T1 is in phase or reverse with the first coil L1;

A fourth switch (13) for selectively switching the output signals of the first and second switches (10) (11) or the transformer (T1) to the measuring device (14) by switching according to an input switching control signal;

A measuring unit (14) for measuring a noise signal supplied from the fourth switch (13);

The switching operation of the first to fourth switches 10 to 13 is controlled according to the noise component separation mode set by the user's mode selection unit 15 so that 1L noise, 2L noise, common noise, and normal noise can be measured separately. A controller 16;

It is characterized in that the noise generated in the load (electronics) to be measured by the component can be easily separated and measured by the component, thereby easy to counter the electromagnetic noise, and also easy to manufacture because the simple configuration Of course, the reliability of the performance also relates to an improved electromagnetic noise component separation device.

Description

Separation device to EMI noise ingredient

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic noise component separating apparatus, and in particular, a switching operation according to a noise component separation mode set according to a user's operation to separate noise detected by a noise detector for each component, and to be supplied to a measuring instrument, thereby providing a load to be measured. The noise generated in (Electronics) can be easily separated and measured for each component, and the configuration is simple and easy to manufacture, as well as the reliability of the electromagnetic wave noise component separation device with improved performance.

FIG. 1 shows a conventional apparatus for measuring noise generated in the load 2, in which power is supplied to the load 2 through the pseudo power network 1.

The noise generated as the load 2 operates is reversed along the wire and detected by the pseudo power network 1, and the noise flowing along each wire detected by the pseudo power network 1 is output terminal 1L. Is output via 2L).

In the conventional device configured as described above, the user who wants to measure the noise generated by the load 2 has a trouble to measure by connecting a separate measuring device to the output terminals 1L and 2L. Although the electromagnetic noise generated by the load 2 is a component in which normal noise and common noise are synthesized, noise cannot be measured for each component. Therefore, the measured waveform alone does not separate and analyze the noise component. There is a very complicated problem that must be taken while replacing various kinds of countermeasure parts.

Accordingly, the present invention for solving the above problem is to switch the operation according to the noise component separation mode set according to the user's operation to separate the noise detected by the pseudo power network for each component to be supplied to the measuring device, It is possible to easily measure the noise generated by electronic components) by component, and to easily measure the electromagnetic noise, and also the simple configuration makes it easy to manufacture and also improves the reliability of the electromagnetic noise. It is an object to provide a device.

1 is a block diagram showing a conventional noise measuring apparatus.

2 is a view showing an electromagnetic noise component separation apparatus of the present invention.

3 is a view showing another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: pseudo power network, 2: load,

10-13: switch, T1: transformer,

14: measuring instrument, 15: mode selector,

16: control unit, 17: power unit,

18: display unit,

2 shows an electromagnetic noise component separation apparatus of the present invention for achieving the above object,

In the case of including a pseudo power supply network (1) for detecting the noise generated from the load and output through the output terminals (1L) (2L),

First and second switches (10) (11) for switching in accordance with an input switching control signal to switch the noise output through the output terminals (1L) and (2L) in three stages (a, b, c);

The first and second coils L1 and L2 on the primary side are connected to one terminal of the first and second switches 10 and 11, and the signal input to the primary coils L1 and L2 on the secondary side. A transformer T1 which is induced and output to the third coil L3;

A third switch 12 that operates according to a set noise component separation mode and operates so that the polarity of the second coil L2 of the transformer T1 is in phase or reverse with the first coil L1;

A fourth switch (13) for selectively switching the output signals of the first and second switches (10) (11) or the transformer (T1) to the measuring device (14) by switching according to an input switching control signal;

A measuring unit (14) for measuring a noise signal supplied from the fourth switch (13);

The switching operation of the first to fourth switches 10 to 13 is controlled according to the noise component separation mode set by the user's mode selection unit 15 so that 1L noise, 2L noise, common noise, and normal noise can be measured separately. The controller 16 is characterized in that the configuration.

The apparatus further includes a power supply unit 17 for supplying driving power for each component, and a display unit 18 for displaying the operation status and the selected mode of the apparatus.

The operation of the present invention configured as described above will be described separately according to the noise separation mode set by the user's operation of the mode selection unit 15.

(1L noise)

When the user operates the mode selector 15 to set the 1L noise mode, the controller 16 outputs a switching control signal so that the first and second switches 10 and 11 are switched to the a terminal. The fourth switch 13 is switched to terminal a.

As described above, when each switch 10, 11, 13 is switched to terminal a,

Among the noises detected by the noise detector 1 and output to the output terminals 1L and 2L, the noise signal output through the output terminal 1L is the terminal a of the first switch 10 and the fourth switch 13. The noise signal outputted through the output terminal 2L is grounded by passing through the resistor R2 through the a terminal of the second switch 11 and grounded through the resistor R2. In 14) it is not measured.

As a result, the user can measure 1L noise generated at the load as a value measured by the measuring device 14 and flowing through one wire.

(2L noise)

When the user operates the mode selector 15 to set the 2L noise mode, the controller 16 outputs a switching control signal so that the first and second switches 10 and 11 are switched to the b terminal. The fourth switch 13 is switched to the b terminal.

As described above, when each switch 10, 11, 13 is switched to b terminal,

Among the noises detected by the noise detector 1 and output to the output terminals 1L and 2L, the noise signal output through the output terminal 2L is the b terminal of the second switch 11 and the fourth switch 13. It is supplied to the measuring device 14 through the measurement, and the noise signal output through the output terminal (1L) is grounded through the resistor (R1) through the b terminal of the first switch 10, the measuring device ( In 14) it is not measured.

As a result, the user can measure 2L noise generated at the load as a value measured by the measuring device 14 and flowing through one wire.

(Common noise)

When the user operates the mode selector 15 to set the common noise mode, the controller 16 outputs a switching control signal so that the first, second, and fourth switches 10, 11, 13 are connected to the c terminal. At the same time, the switch S1 and S2 of the third switch 12 are switched to the terminal a so that the polarity of the first coil L1 and the second coil L2 of the transformer T1 becomes in phase. do.

As described above, when each switch 10, 11, 13 is switched to the c terminal and the third switch 12 is switched to the a terminal, the first and second coils L1 of the transformer T1. Common noise is supplied to L2).

That is, the noise signal output through the output terminals 1L and 2L of the pseudo power supply network 1 is transmitted through the c terminal of the first and second switches 10 and 11 to the first coil L1 of the transformer T1. ) And the second coil L2, respectively, in which only common noise flows through the first coil L1 and the second coil L2, and thus, the third coil L3 of the secondary side of the transformer T1. ), Only the common noise signal is induced and supplied to the measuring device 14 through the c terminal of the fourth switch 13.

(Normal noise)

When the user operates the mode selector 15 to set the normal noise mode, the controller 16 outputs a switching control signal so that the first, second, and fourth switches 10, 11, 13 are connected to the c terminal. And switch S1 and S2 of the third switch 12 to terminal b so that the polarity of the first coil L1 and the second coil L2 of the transformer T1 is reversed. do.

As described above, when each switch 10, 11, 13 is switched to the c terminal and the third switch 12 is switched to the b terminal, the first and second coils L1 of the transformer T1. Normal noise is supplied to L2).

That is, the noise signal output through the output terminals 1L and 2L of the pseudo power supply network 1 is transmitted through the c terminal of the first and second switches 10 and 11 to the first coil L1 of the transformer T1. ) And the second coil L2, respectively, in which only normal noise flows through the first coil L1 and the second coil L2, and thus, the third coil L3 of the secondary side of the transformer T1. ), Only the normal noise signal is induced and supplied to the measuring device 14 through the c terminal of the fourth switch 13.

According to the present invention as described above, the apparatus is connected to the output terminals 1L and 2L of the noise detector 1, and then the mode selection unit 15 is operated to set the desired noise component separation mode. The noise signal output from the output terminals 1L and 2L is separated and supplied to the measuring device by the switching operation of the switching means, so that the user can easily measure the noise generated from the load for each component.

On the other hand, Figure 4 shows another embodiment of the present invention,

As the first switch 10, the second switch 11, and the fourth switch 13 applied to the present invention are embodied as two-stage switching switches,

The first switch 10 is configured by connecting two switches 10a and 10b that are switched in two stages in series, and the second switch 11 includes two switches 10a and 10b that are switched in two stages. The fourth switch 13 is implemented as a two-stage switch, and the effect realized by the switching operation of each switch is the same as the above-described operation of the present invention, and thus will be omitted.

As described above, according to the present invention, the switching operation is performed according to the noise component separation mode set according to the user's operation, so that the noise detected by the noise detector is separated for each component and supplied to the measuring instrument, thereby being used in a load (electronic product) to be measured. The noise generated can be easily separated and measured for each component. Therefore, countermeasures against electromagnetic noise can be easily performed. Also, since the configuration is simple, it is easy to manufacture and the reliability of the performance is also improved.

Claims (2)

In the case of including a pseudo power supply network (1) for detecting the noise generated from the load and output through the output terminals (1L) (2L), First and second switches (10) (11) for switching in accordance with an input switching control signal to switch the noise output through the output terminals (1L) and (2L) in three stages (a, b, c); The first and second coils L1 and L2 on the primary side are connected to one terminal of the first and second switches 10 and 11, and the signal input to the primary coils L1 and L2 on the secondary side. A transformer T1 which is induced and output to the third coil L3; A third switch 12 that operates according to a set noise component separation mode and operates so that the polarity of the second coil L2 of the transformer T1 is in phase or reverse with the first coil L1; A fourth switch (13) for selectively switching the output signals of the first and second switches (10) (11) or the transformer (T1) to the measuring device (14) by switching according to an input switching control signal; A measuring unit (14) for measuring a noise signal supplied from the fourth switch (13); The switching operation of the first to fourth switches 10 to 13 is controlled according to the noise component separation mode set by the user's mode selection unit 15 so that 1L noise, 2L noise, common noise, and normal noise can be measured separately. A controller 16; Electromagnetic noise component separation device, characterized in that consisting of. 2. The electromagnetic wave noise component separating device according to claim 1, further comprising a display section (18) indicating an operation state of the device and a selected mode.