CN202145637U - Silicon controlled rectifier driving circuit used for soybean milk machine - Google Patents
Silicon controlled rectifier driving circuit used for soybean milk machine Download PDFInfo
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- CN202145637U CN202145637U CN201120198821U CN201120198821U CN202145637U CN 202145637 U CN202145637 U CN 202145637U CN 201120198821 U CN201120198821 U CN 201120198821U CN 201120198821 U CN201120198821 U CN 201120198821U CN 202145637 U CN202145637 U CN 202145637U
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- power supply
- controllable silicon
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- silicon controlled
- optocoupler
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Abstract
The utility model provides a silicon controlled rectifier driving circuit which is simple in structure and low in cost. The silicon controlled rectifier driving circuit comprises a silicon controlled rectifier, a switch power supply, an optical coupler and a control device for supplying silicon controlled rectifier driving signals, wherein a main electrode of the silicon controlled rectifier is connected with an input end of commercial power, the other main electrode of the silicon controlled rectifier is connected with a load, an output end of the control device is connected with a trigger electrode of the silicon controlled rectifier via the optical coupler, the switch power supply comprises a coiling for supplying -5V power supply relative to the commercial power, a triode emitter electrode pf the optical coupler is connected with an output of the -5V power supply coiling, and a triode collector electrode is used for driving the trigger electrode of the silicon controlled rectifier. Beneficial effects are that the circuit has a simple structure, general PC817 serial optical coupler driving silicon controlled rectifiers can be adopted, and cost is low, an amplification triode is arranged between the optical coupler and the trigger electrode of the silicon controlled rectifier, and reliable conduction of the silicon controlled rectifier is guaranteed, and an input protection circuit is arranged for the switch power supply, thereby guaranteeing safety, reliability and a long service life.
Description
Technical field
The utility model relates to a kind of controllable silicon drive circuit, is specifically related to a kind of through optocoupler driving silicon controlled controllable silicon drive circuit.
Background technology
Kitchen small household appliances for example soy bean milk making machine, cooking machine and juice extractor etc. all need be used controllable silicon drive circuit; Existing controllable silicon drive circuit generally comprises and comprises controllable silicon, Switching Power Supply, optocoupler and the control device that the controllable silicon drive signal is provided; Main electrode of silicon controlled links to each other with the mains electricity input end, and another main electrode of silicon controlled links to each other with load, and the output of control device links to each other with the controllable silicon trigger electrode through optocoupler; Owing to receive the restriction of Switching Power Supply structure; Photo-sensitive cell in the optocoupler adopts controllable silicon, and its cost is higher, is difficult to promote.
Summary of the invention
To the problems referred to above that prior art exists, the utility model provides a kind of controllable silicon drive circuit that is used for soy bean milk making machine simple in structure, with low cost.
The technical scheme that realizes the utility model purpose is:
The controllable silicon drive circuit that is used for soy bean milk making machine; Comprise controllable silicon, Switching Power Supply, optocoupler and the control device that the controllable silicon drive signal is provided; Main electrode of said silicon controlled links to each other with the mains electricity input end; Another main electrode of silicon controlled links to each other with load, and the output of control device links to each other with the controllable silicon trigger electrode through optocoupler, said Switching Power Supply have be used to provide with respect to civil power-5V power supply winding; Transistor emitter in the said optocoupler with respect to civil power-5V power supply winding output links to each other, collector electrode is used to drive the controllable silicon trigger electrode.
Triode in the said optocoupler links to each other with the controllable silicon trigger electrode through an amplifying triode and a current-limiting resistance; The amplifying triode emitter links to each other with the controllable silicon trigger electrode through a current-limiting resistance; The amplifying triode collector electrode links to each other with transistor emitter in the optocoupler through a current-limiting resistance, and the amplifying triode base stage links to each other with transistor collector in the optocoupler.
Light-emitting diodes tube anode in the said optocoupler links to each other with the 5V power supply through a current-limiting resistance, and the light-emitting diodes tube cathode in the optocoupler links to each other with the controllable silicon drive signal output of control device.
Said Switching Power Supply comprise through the former limit winding that Switching Power Supply input and protective circuit link to each other with the mains electricity input end, for peripheral circuit the light current output winding of light current power supply output is provided and provide with respect to civil power-5V power supply winding.
Said Switching Power Supply input circuit comprises rectifier diode, filter capacitor, filter inductance and the RC absorption network of being made up of resistance and electric capacity; Said protective circuit of switch power source comprise connect with civil power live wire, zero line between piezo-resistance and surge inhibition electric capacity.
The beneficial effect of the utility model mainly shows: circuit structure is simple, can adopt general PC817 series optocoupler to drive controllable silicon, and cost is low; Between optocoupler and controllable silicon trigger electrode, amplifying triode is set, guarantees the reliable conducting of controllable silicon; Switching Power Supply is provided with input protection circuit, and is safe and reliable, long service life.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done and to be described in further detail:
With reference to Fig. 1; The controllable silicon drive circuit that is used for soy bean milk making machine; Comprise controllable silicon TR1, Switching Power Supply, optocoupler U6 and the control device that the controllable silicon drive signal is provided, the main electrode of controllable silicon TR1 links to each other with the mains electricity input end, and another main electrode OUT end of controllable silicon TR1 links to each other with load; The output of control device links to each other with controllable silicon trigger electrode TR1 through optocoupler U6; Switching Power Supply have be used to provide with respect to civil power-5V power supply winding wiring4, controllable silicon can link to each other with civil power zero line or live wire, in the present embodiment; The controllable silicon main electrode links to each other with zero-power line input ACL, and this power supply winding provides the power supply of the low 5V of power line voltage that links to each other than controllable silicon to get final product; Transistor emitter among the optocoupler U6 with respect to civil power-5V power supply winding output links to each other, collector electrode is used to drive the controllable silicon trigger electrode.
Triode among the optocoupler U6 links to each other with the controllable silicon trigger electrode through an amplifying triode Q1 and current-limiting resistance R11; Amplifying triode Q1 emitter links to each other with the controllable silicon trigger electrode through a current-limiting resistance R11; The amplifying triode collector electrode links to each other with transistor emitter among the optocoupler U6 through a current-limiting resistance R41, and amplifying triode Q1 base stage links to each other with transistor collector in the optocoupler.
Light-emitting diodes tube anode in the optocoupler links to each other with the 5V power supply through a current-limiting resistance, and the light-emitting diodes tube cathode in the optocoupler links to each other with the controllable silicon drive signal output DRV of control device.
Switching Power Supply comprise the former limit winding wiring1 that links to each other with the mains electricity input end through Switching Power Supply input and protective circuit, for peripheral circuit the light current output winding wiring2 of light current power supply output is provided and provide with respect to civil power-5V power supply winding wiring4.Switching Power Supply also comprises an auxiliary winding wiring3, and auxiliary winding one end links to each other with the mains electricity input end through the AC/DC change-over circuit, and the other end provides with reference to zero potential; The AC/DC change-over circuit comprises chip IC 1, capacitor C 3, voltage stabilizing didoe ZD1, electrode capacitance EC2, capacitor C 4, resistance R 3 and diode D6.Peripheral circuit comprises three terminal regulator U2, diode D8 etc., and is irrelevant with the utility model inventive point, do not give unnecessary details at this.With respect to civil power-5V power supply winding one end connects with reference to zero potential, the other end is through filter circuit of pressure-stabilizing output-5V voltage, filter circuit of pressure-stabilizing comprises rectifier diode D9, voltage stabilizing didoe D10 and filter capacitor EC3.
The Switching Power Supply input circuit comprises rectifier diode D1, filter capacitor EC1, filter inductance L1 and the RC absorption network of being made up of resistance (R2, R1) and capacitor C 2; Protective circuit of switch power source comprise connect with civil power live wire ACN, zero line ACL between piezo-resistance VDR1 and surge inhibition capacitor C 1.
Though the utility model is through illustrating and describe with reference to preferred embodiment; But those skilled in the art should understand, and can be not limited to the description of present embodiment; In the scope of claims, can make the various variations on form and the details.
Claims (5)
1. the controllable silicon drive circuit that is used for soy bean milk making machine; Comprise controllable silicon, Switching Power Supply, optocoupler and the control device that the controllable silicon drive signal is provided; Main electrode of said silicon controlled links to each other with the mains electricity input end; Another main electrode of silicon controlled links to each other with load, and the output of control device links to each other with the controllable silicon trigger electrode through optocoupler, it is characterized in that: said Switching Power Supply have be used to provide with respect to civil power-5V power supply winding; Transistor emitter in the said optocoupler with respect to civil power-5V power supply winding output links to each other, collector electrode is used to drive the controllable silicon trigger electrode.
2. the controllable silicon drive circuit that is used for soy bean milk making machine according to claim 1; It is characterized in that: the triode in the said optocoupler links to each other with the controllable silicon trigger electrode through an amplifying triode and a current-limiting resistance; The amplifying triode emitter links to each other with the controllable silicon trigger electrode through a current-limiting resistance; The amplifying triode collector electrode links to each other with transistor emitter in the optocoupler through a current-limiting resistance, and the amplifying triode base stage links to each other with transistor collector in the optocoupler.
3. the controllable silicon drive circuit that is used for soy bean milk making machine according to claim 2; It is characterized in that: the light-emitting diodes tube anode in the said optocoupler links to each other with the 5V power supply through a current-limiting resistance, and the light-emitting diodes tube cathode in the optocoupler links to each other with the controllable silicon drive signal output of control device.
4. according to claim 1 or the 2 or 3 described controllable silicon drive circuits that are used for soy bean milk making machine, it is characterized in that: said Switching Power Supply comprise through the former limit winding that Switching Power Supply input and protective circuit link to each other with the mains electricity input end, for peripheral circuit the light current output winding of light current power supply output is provided and provide with respect to civil power-5V power supply winding.
5. the controllable silicon drive circuit that is used for soy bean milk making machine according to claim 4 is characterized in that: said Switching Power Supply input circuit comprises rectifier diode, filter capacitor, filter inductance and the RC absorption network of being made up of resistance and electric capacity; Said protective circuit of switch power source comprise connect with civil power live wire, zero line between piezo-resistance and surge inhibition electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198821U CN202145637U (en) | 2011-06-14 | 2011-06-14 | Silicon controlled rectifier driving circuit used for soybean milk machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198821U CN202145637U (en) | 2011-06-14 | 2011-06-14 | Silicon controlled rectifier driving circuit used for soybean milk machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202145637U true CN202145637U (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120198821U Expired - Fee Related CN202145637U (en) | 2011-06-14 | 2011-06-14 | Silicon controlled rectifier driving circuit used for soybean milk machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202145637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911889A (en) * | 2016-04-12 | 2016-08-31 | 广东美的厨房电器制造有限公司 | Household electrical appliance and control method thereof |
-
2011
- 2011-06-14 CN CN201120198821U patent/CN202145637U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911889A (en) * | 2016-04-12 | 2016-08-31 | 广东美的厨房电器制造有限公司 | Household electrical appliance and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120215 Termination date: 20150614 |
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| EXPY | Termination of patent right or utility model |