CN88212736U - Power supply trigger - Google Patents
Power supply trigger Download PDFInfo
- Publication number
- CN88212736U CN88212736U CN 88212736 CN88212736U CN88212736U CN 88212736 U CN88212736 U CN 88212736U CN 88212736 CN88212736 CN 88212736 CN 88212736 U CN88212736 U CN 88212736U CN 88212736 U CN88212736 U CN 88212736U
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- CN
- China
- Prior art keywords
- power supply
- circuit
- trigger
- inductance coil
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a power supply trigger of the TV set, comprising a dry reed relay arranged on the middle portion of an inductance coil and between the collector and the emitter of an adjusting triode in parallel with a voltage regulator circuit of a power supply and a circuit in series connection with a current limit resistor. One end of the inductance coil is connected with the collector of the adjusting triode and the other end is in series connection with a circuit of zero connection of an electrolytic capacitor. The utility model enables the interference proofing performance of the voltage regulator circuit of the power supply of the TV set to be reinforced without the influence of the variation of the outer environment and is an ideal component for the voltage regulator circuit of the power supply of the TV set.
Description
The utility model is a kind of power trigger of television set.
The power trigger of existing television set is the collector electrode of an adjustment triode that is connected in parallel on the TV set power voltage stabilizing circuit and the shunt resistance between the emitter.This power trigger, under normal voltage, electric current is by this shunt resistance, for the sampling part of power supply stabilization circuit, promote amplifier section operating current be provided, trigger this adjustment triode and begin operate as normal, making power supply stabilization circuit begin operate as normal, is the each several part power supply of television set with the rated current, makes the complete machine operate as normal.Because this power trigger is a shunt resistance, therefore, when brownout, the electric current that flows through this shunt resistance will be less than rated current, can not provide enough electric currents for sampling part, the promotion amplifier section of power supply stabilization circuit, make its operate as normal, just can not trigger the triode work of adjusting; When overtension, electric current is directly sent into emitter from the collector electrode of adjusting triode by shunt resistance, makes the adjustment triode lose the part control action, will be the each several part power supply of television set with bigger electric current, make the complete machine cisco unity malfunction, and the easy burn-out components and parts.
The purpose of this utility model just provides a kind of TV set power voltage stabilizing circuit operate as normal, power trigger that not influenced by change of external conditions of making.
The utility model is to be parallel with the circuit that a dry-reed relay that places the inductance coil middle part is connected with a current-limiting resistance between the collector electrode of the adjustment triode of TV set power voltage stabilizing circuit and emitter, one end of inductance coil is connected with the collector electrode of above-mentioned adjustment triode, electrochemical capacitor connecting to neutral of other end series connection.This trigger, under normal voltage or overtension or low excessively situation, electric current can both charge to electric capacity by the circuit of inductance and capacitances in series, a because termination of electric capacity zero, charging current is just bigger, therefore, just produce a bigger magnetic field at the middle part of inductance coil, this magnetic field is enough to make the moving stator closure of the dry-reed relay that places this inductance coil middle part, and electric current is by doing the moving stator of yellow relay, flow through current-limiting resistance, sampling part for power supply stabilization circuit, promoting amplifier section operating current is provided, trigger the adjustment triode and begin operate as normal, is the each several part power supply of television set, make it begin operate as normal, after the electric capacity charging finished, the electric current on the inductance reduced, and magnetic field disappears, at this moment, the moving stator auto-cutout of dry-reed relay, the work of this power trigger is finished, breaks away from this power supply stabilization circuit, make the power supply stabilization circuit operate as normal, the influence that not changed by external voltage.
The utility model is compared with existing TV set power trigger, it strengthens the antijamming capability of TV set power voltage stabilizing circuit, not being subjected to the influence of external condition, is the ideal accessory of television set voltage stabilizing circuit, in the city, small towns and outlying district can both use.
Description of drawings:
Fig. 1 the utility model structure chart
Fig. 2 the utility model line map
Fig. 3 the utility model is used for the circuit diagram on the Chengdu board 310 type TV set power voltage stabilizing circuits
Embodiment 1:
As shown in Figure 3, be that the utility model is used for the circuit diagram on the Chengdu board 310 type TV set power voltage stabilizing circuits.Being parallel with one between the collector electrode of adjusting triode BG703 in the NPN of this TV set power voltage stabilizing circuit type and the emitter, to place inductance value be that dry-reed relay J and a resistance at the inductance coil L middle part of 2000 microhenrys is the circuit that 10 ohm current-limiting resistance R connects, the collector electrode of the end of inductance coil L and above-mentioned adjustment triode BG703 joins, electrochemical capacitor C ground connection that capacity is 1500 microfarads of other end series connection has replaced the NPN type that is connected in parallel on this TV set power voltage stabilizing circuit originally and has adjusted the collector electrode of triode BG703 and the shunt resistance R * 23-8 between the emission.Other line devices and the parameter of this TV set power voltage stabilizing circuit are all constant.The emitter of triode BG701 of promptly taking a sample is connected to the voltage stabilizing didoe Dw that a voltage stabilizing value is the 6-7 volt; it is 33 ohm current-limiting protection resistance R 704 that its base stage has a resistance; connect the resistance variable again and be 3 kilo-ohms variable resistor Rw; the capacitor C 706 that also to be connected to a capacity between the convertible tip of variable resistor Rw and this circuit output end of pressure-stabilizing be 47 microfarads; the output of two these voltage stabilizing circuits of termination of variable resistor Rw; after adjustment triode BG703 collector electrode and its collector load resistor R702 join; connect the output of this voltage stabilizing circuit again; directly connect the base stage that promotes amplifying triode BG702; and the capacitor C 707 that to be connected to a capacity over the ground be 100 microfarads; the collector electrode of BG702 is connected to its load resistance R703; connect the output of this voltage stabilizing circuit again; its emitter directly connects the base stage of BG703, and the collector and emitter of BG703 connects the input and the output of this steady potential circuit respectively.Here it is the utility model is used on the Chengdu board 310 type TV set power voltage stabilizing circuits circuit diagram.
When line voltage is 220 volts, or when too high or too low, through rectification, filter circuit, obtain one 18 volts at the input Usr of this voltage stabilizing circuit, or it is too high, or low excessively voltage, this voltage can both charge to capacitor C by the circuit that inductance L is connected with capacitor C, a because end ground connection of this electric capacity, charging current is bigger, just produces a bigger magnetic field at the middle part of inductance coil L, makes the moving stator closure of the dry-reed relay J that places the inductance L middle part, electric current is by the moving stator of dry-reed relay J, flow through current-limiting resistance R,, send into the base stage of BG701 again by sample resistance Rw, control its collector electrode output positive voltage, again after BG702 amplifies, directly for the base stage of BG703 provides signal voltage, make BG703 adjust triode and begin operate as normal by the emitter of BG702, output at this voltage stabilizing circuit obtains 10.5 volts comparatively stable voltage, makes the complete machine operate as normal.After about 3 seconds, the capacitor C charging finishes, and the electric current of inductance L reduces, and magnetic field disappears, at this moment, do the moving stator automatic disconnection of yellow relay J, the work of this power trigger is finished, break away from this power supply stabilization circuit, make the power supply stabilization circuit operate as normal, the influence that not changed by external voltage.
Claims (1)
1, a kind of power trigger of television set, be parallel between the collector electrode and emitter of adjustment triode of power supply stabilization circuit, it is characterized in that said power trigger is a circuit that the dry-reed relay that places inductance coil middle part is connected with a current-limiting resistance, one end of inductance coil is connected with the collector electrode of above-mentioned adjustment triode, electrochemical capacitor connecting to neutral of other end series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88212736 CN88212736U (en) | 1988-01-26 | 1988-01-26 | Power supply trigger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88212736 CN88212736U (en) | 1988-01-26 | 1988-01-26 | Power supply trigger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN88212736U true CN88212736U (en) | 1988-10-19 |
Family
ID=4846009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88212736 Withdrawn CN88212736U (en) | 1988-01-26 | 1988-01-26 | Power supply trigger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN88212736U (en) |
-
1988
- 1988-01-26 CN CN 88212736 patent/CN88212736U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |