CN2741081Y - DC signal transmission device used in AC circuit - Google Patents
DC signal transmission device used in AC circuit Download PDFInfo
- Publication number
- CN2741081Y CN2741081Y CN 200420050895 CN200420050895U CN2741081Y CN 2741081 Y CN2741081 Y CN 2741081Y CN 200420050895 CN200420050895 CN 200420050895 CN 200420050895 U CN200420050895 U CN 200420050895U CN 2741081 Y CN2741081 Y CN 2741081Y
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- circuit
- parallel
- load
- direct current
- diode
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- Expired - Fee Related
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- 230000008054 signal transmission Effects 0.000 title 1
- 239000004065 semiconductor Substances 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000010616 electrical installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model belongs to a control device. The alternating current circuit is internally provided with a direct current component generating device which is connected with the load in series and a direct current component extracting device which is connected with the load in parallel, wherein the direct current component generating device is composed of a semiconductor device combination which provides a passage for alternating current and generates different voltage drops by positive and negative half waves and a short-circuit switch which is connected with the semiconductor device combination in parallel, the direct current component extracting device is composed of a voltage sampling circuit which is connected with the load in parallel and a low-pass filter which is connected with a sampling point of the low-pass filter, the output end of the low-pass filter is connected with the control input end of the relay driving circuit, and a relay contact. The device adopts the existing general components and parts in the market, and can realize the on-off control of a plurality of loads such as motors, electric appliances and combined lamps by a low-cost, simple and reliable control circuit.
Description
Technical field
The utility model belongs to control device, relates to the direct current signal transfer device that uses at ac circuit of the control of a kind of switching value that is used for application systems such as industrial electrical equipment or civil electric appliance or other variable.
Background technology
In the electrical installation application system of using alternating current, some systems form by executing control part and controlled part, and they separate again.If the connection between two parts does not allow or is inconvenient to install additional the control signal line, can only use carrier wave to transmit signal at present.
The control structure that above-mentioned use carrier wave transmits signal is comparatively complicated, and cost is also higher.
Summary of the invention
The utility model is to execute control and controlled part and use comparatively also technical problems of high of complexity, cost of carrier wave transfer control signal structure in order to solve the electrical installation that uses alternating current, and proposes a kind of simple in structure, direct current signal transfer device that uses in ac circuit that cost is low.
The utility model is that solution uses the electrical installation of alternating current to execute control and controlled part uses the technical matters of carrier wave transfer control signal existence to take following technical scheme: be provided with DC component generation device that is in series with load and the DC component extraction element that is in parallel with load in the ac circuit, described DC component generation device is to be made of combination of the different semiconductor devices of the pressure drop that provides path and positive and negative half-wave to produce for alternating current and the short circuiting switch that is parallel to this semiconductor devices combination, described DC component extraction element is to be made of with the low-pass filter that is connected its sampled point the voltage sampling circuit that is parallel to load, the output terminal of low-pass filter and relay drive circuit control input end join, and relay contact is connected in the controlled end of load.
The utility model can also be taked following technical measures:
Described semiconductor devices combination is to be made of two voltage stabilizing diode differential concatenations, and wherein at least one voltage stabilizing diode is parallel with short circuiting switch.
Described semiconductor devices combination is the asymmetric diode combinations that is made of two different diode series aiding connection branch road reverse parallel connections of number, and at least one diode of a series connection branch road that wherein the diode number is many is parallel with short circuiting switch.
The beneficial effects of the utility model and advantage: because the asymmetry of DC component generation device semiconductor devices, can make ac circuit produce DC component, the DC component extraction element can obtain these DC component, and is converted to the switch motion of may command ac circuit load.The actual use of this device is the long-range control point of executing that the DC component generation device is installed on the ac circuit load, the DC component extraction element is installed on the controlled point at ac circuit load place, obviously execute and to install the keying control that the control signal line can be realized load between control point and the controlled point additional, also greatly simplify and reduce than the control structure and the cost of carrier wave transmission signal.This device adopts the existing universal elements in market, with low-cost, simple, control circuit can be realized the keying control to a plurality of loads such as motor, electrical equipment, combination lamp reliably.
Description of drawings
Accompanying drawing 1 is the utility model embodiment 1 circuit theory diagrams.
Accompanying drawing 2 is the utility model embodiment 2 circuit theory diagrams.
Accompanying drawing 3 is the utility model relay drive circuit embodiment circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment 1 as shown in Figure 1, connect in the ac circuit of AC power and be provided with the DC component generation device that is in series with load R, described DC component generation device is to be made of different semiconductor devices combination of the pressure drop that provides path and positive and negative half-wave to produce for alternating current and the short circuiting switch that is parallel to this semiconductor devices combination.The semiconductor devices combination of present embodiment 1 is to be made of two voltage stabilizing diode DW1, DW2 differential concatenation according to the different characteristic of the forward and reverse pressure drop of voltage stabilizing diode, the differential concatenation branch road is provided with short circuiting switch K1, voltage stabilizing diode DW2 also is provided with short circuiting switch K2, and short circuiting switch K1, K2 can make the DC component generation device produce two DC component that its value is different.
Be provided with the DC component extraction element that is in parallel with load R in the ac circuit of embodiment 1, it is to be made of with the low-pass filter B that is connected its sampled point the voltage sampling circuit that resistance R 1 that is parallel to load and capacitor C 1 constitute, output terminals A output and the corresponding control voltage of sampled point of low-pass filter B, this voltage can be used for the control of relay drive circuit, and its relay contact is connected in the controlled end of load P.
Embodiment 2 as shown in Figure 2, its semiconductor devices combination is to be made of two different diode series aiding connection branch road reverse parallel connections of number, be the asymmetric diode combinations of diode D1, D2, D3 series aiding connection branch road and diode D4 branch road reverse parallel connection, because its forward and reverse pressure drop difference of asymmetry of two branch roads.Asymmetric diode combinations two ends are provided with short circuiting switch K1, and the diode D3 in diode D1, D2, the D3 series aiding connection branch road also is provided with short circuiting switch K2.The effect of short circuiting switch K1, K2 is same as embodiment 1.
Be provided with the DC component extraction element that is in parallel with load P in the ac circuit of embodiment 2, it is to be made of with the low-pass filter B that is connected its sampled point the voltage sampling circuit that resistance R 1 that is parallel to load R and resistance R 2 constitute, output terminals A output and the corresponding control voltage of sampled point of low-pass filter B, its effect is same as embodiment 1.
The output terminals A of the low-pass filter B of the various embodiments described above is used for the control of relay drive circuit, and its circuit theory as shown in Figure 3.DC component generation device and DC component extraction element among Fig. 3 are same as embodiment 1.Q represents the transistor relay driving circuit among Fig. 3, two transistor relay driving circuits of the actual connection of the output terminals A of low-pass filter B, the DC voltage that varies in size that produces under the corresponding respectively short circuiting switch K1 of the forward voltage of two circuit transistors, K2 disjunction simultaneously and K1 disjunction, the closed two kinds of situations of K2, then pilot relay J1, J2 move or only one of them action simultaneously, make load P 1, P2 obtain corresponding control.Transistor relay driving circuit embodiment illustrated in fig. 3 also can be a counter etc., can finish load P 1P2 form more control.
Claims (3)
1, the direct current signal transfer device that in ac circuit, uses, it is characterized in that: be provided with DC component generation device that is in series with load and the DC component extraction element that is in parallel with load in the ac circuit, described DC component generation device is to be made of combination of the different semiconductor devices of the pressure drop that provides path and positive and negative half-wave to produce for alternating current and the short circuiting switch that is parallel to this semiconductor devices combination, described DC component extraction element is to be made of with the low-pass filter that is connected its sampled point the voltage sampling circuit that is parallel to load, the output terminal of low-pass filter and relay drive circuit control input end join, and relay contact is connected in the controlled end of load.
2, direct current signal transfer device according to claim 1 is characterized in that: described semiconductor devices combination is to be made of two voltage stabilizing diode differential concatenations, and wherein at least one voltage stabilizing diode is parallel with short circuiting switch.
3, direct current signal transfer device according to claim 1, it is characterized in that: described semiconductor devices combination is the asymmetric diode combinations that is made of two different diode series aiding connection branch road reverse parallel connections of number, and at least one diode of a series connection branch road that wherein the diode number is many is parallel with short circuiting switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420050895 CN2741081Y (en) | 2004-05-12 | 2004-05-12 | DC signal transmission device used in AC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420050895 CN2741081Y (en) | 2004-05-12 | 2004-05-12 | DC signal transmission device used in AC circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2741081Y true CN2741081Y (en) | 2005-11-16 |
Family
ID=35351366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420050895 Expired - Fee Related CN2741081Y (en) | 2004-05-12 | 2004-05-12 | DC signal transmission device used in AC circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2741081Y (en) |
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2004
- 2004-05-12 CN CN 200420050895 patent/CN2741081Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |