CN202997691U - An automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch - Google Patents
An automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch Download PDFInfo
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- CN202997691U CN202997691U CN 201220742722 CN201220742722U CN202997691U CN 202997691 U CN202997691 U CN 202997691U CN 201220742722 CN201220742722 CN 201220742722 CN 201220742722 U CN201220742722 U CN 201220742722U CN 202997691 U CN202997691 U CN 202997691U
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- diode
- capacitor
- battery
- power supply
- electronic switch
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Abstract
The utility model discloses an automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch. The automatic switching circuit comprises a first polarized capacitor, a second polarized capacitor, a first unpolarized capacitor, a second unpolarized capacitor, a first diode, and a second diode. The first polarized capacitor is connected with the first unpolarized capacitor in parallel. The negative pole of the first polarized capacitor is connected with ground, while the positive pole is connected with commercial power on which voltage reduction, rectification, and voltage stabilization have been performed and the positive pole of the first diode. The second polarized capacitor is connected with the second unpolarized capacitor in parallel. The negative pole of the second polarized capacitor is connected with ground, while the positive pole of the second polarized capacitor is connected with the positive pole of the second diode. The negative pole of the first diode is connected with the negative pole of the second diode to be used as an output end in order to provide power for a clock chip or an electronic impulse igniter. The automatic switching circuit with a simple and reasonable structure achieves automatic switching between the commercial power and the battery by using the potential difference between the commercial power supply and the battery, and reduces cost.
Description
Technical field
The utility model relates to the control system field of household electrical appliance, particularly a kind of mains supply and powered battery automatic switch-over circuit for electronic switch.
Background technology
Along with the intelligent degree of household electrical appliance is more and more higher, internal battery often in the household electrical appliance controller is so that the partial function (as clock and electromagnetic pulse igniter) of electrical equipment still can be worked during outage.
Yet limited due to the household electrical appliance inner spaces, its battery capacity used is limited, often just needs to change battery after having used a period of time.Available mains supply of while and battery are also arranged to the appearance of the household electrical appliance of clock or the power supply of electromagnetic pulse igniter on Vehicles Collected from Market, but need manually switch power supply, tend to because carelessness for the moment will cause battery electric quantity to exhaust.
The utility model content
Problem to be solved in the utility model is to overcome the defective that above-mentioned prior art exists, a kind of low price, stable power supply and the powered battery automatic switch-over circuit that is used for electronic switch are provided, when mains-supplied is arranged, use mains supply that clock or electronic impulse ignition apparatus are powered; When mains failure, automatically switch and use battery that clock or electronic impulse ignition apparatus are powered.
For achieving the above object, power supply and powered battery automatic switch-over circuit in electronic switch of the present utility model, comprise that first has polar capacitor E1, second that polar capacitor E2, the first polarity free capacitor C1, the second polarity free capacitor C2, the first diode D1 and the second diode D2 are arranged, described first has polar capacitor E1 and the first polarity free capacitor C1 parallel connection, described first has polar capacitor E1 minus earth, the mains supply after anodal connection step-down, rectification, voltage stabilizing and the positive pole of the first diode D1; Described second has polar capacitor E2 and the second polarity free capacitor C2 parallel connection, and described second has polar capacitor E2 minus earth, the anodal positive pole that connects battery and the second diode D2; Described the first diode D1 negative pole is connected with the second diode D2 negative pole, and powers to clock chip or electronic impulse ignition apparatus as output.
Further, when described the first diode D1 and the second diode D2 are silicon diode, can produce the conduction voltage drop of 0.7V during its conducting.
Further, when described the first diode D1 and the second diode D2 are germanium diode, can produce the conduction voltage drop of 0.3V during its conducting.
Further, the supply voltage of described civil power after step-down, rectification, voltage stabilizing is than the high 0.3～1.0V of cell voltage.
Compared with prior art, the technical solution of the utility model has the following advantages: utilize the potential difference between mains supply and battery, realize the automatic conversion of mains supply and battery, and reduced cost.
Description of drawings
Fig. 1 is the principle schematic of power supply and powered battery automatic switch-over circuit in the utility model electronic switch.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, power supply and powered battery automatic switch-over circuit in the utility model electronic switch, comprise that first has polar capacitor E1, second that polar capacitor E2 the first polarity free capacitor C1, the second polarity free capacitor C2, the first diode D1 and the second diode D2 are arranged, described first has polar capacitor E1 and the first polarity free capacitor C1 parallel connection, described first has polar capacitor E1 minus earth, the mains supply after anodal connection step-down, rectification, voltage stabilizing and the positive pole of the first diode D1; Described second has polar capacitor E2 and the second polarity free capacitor C2 parallel connection, and described second has polar capacitor E2 minus earth, the anodal positive pole that connects battery and the second diode D2; Described the first diode D1 negative pole is connected (Q point as shown in Figure 1) with the second diode D2 negative pole, and powers to clock chip or electronic impulse ignition apparatus as output; Described the first diode D1 and the second diode D2 are silicon diode, can produce the conduction voltage drop of 0.7V during its conducting, during for germanium diode, can produce the conduction voltage drop of 0.3V during its conducting; The supply voltage of described civil power after step-down, rectification, voltage stabilizing is than the high 0.3～1.0V of cell voltage.
In the present embodiment, the supply voltage of civil power after step-down, rectification, voltage stabilizing is 1.0V, and cell voltage is 0.3V, by the first diode D1, the second diode D2 isolation mains supply and battery.Magnitude of voltage after the step-down of civil power process, rectification, voltage stabilizing should be than the large 0.3V of battery.
When powering when civil power is normal, it is VCC+0.3V that mains supply arrives the Q point voltage after through the first diode D1 pressure drop 0.7V, voltage VCC higher than battery after through the second diode D2 pressure drop 0.7V, the power supply that outputs to clock chip or electronic impulse ignition apparatus is mains supply, and clock chip or electronic impulse ignition apparatus work is the consuming cells electric weight not.
When having a power failure, the voltage VCC after this moment, the Q point only had battery through the second diode D2 pressure drop 0.7V, the power supply that outputs to clock chip or electronic impulse ignition apparatus is battery, clock chip or electronic impulse ignition apparatus consumption in operation battery electric quantity.Thereby realize the conversion of mains supply and battery, and reduced cost.
In sum, above-mentioned execution mode is not to be restricted execution mode of the present utility model, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present utility model or equivalent deformation are all at technology category of the present utility model.
Claims (4)
1. power supply and powered battery automatic switch-over circuit in an electronic switch, it is characterized in that: comprise that first has polar capacitor (E1), second that polar capacitor (E2), the first polarity free capacitor (C1), the second polarity free capacitor (C2), the first diode (D1) and the second diode (D2) are arranged, described first has polar capacitor (E1) and the first polarity free capacitor (C1) parallel connection, described first has polar capacitor (E1) minus earth, the anodal power supply of civil power after step-down, rectification, voltage stabilizing and the positive pole of the first diode (D1) of connecting; Described second has polar capacitor (E2) and the second polarity free capacitor (C2) parallel connection, and described second has polar capacitor (E2) minus earth, the anodal positive pole that connects battery and the second diode (D2); Described the first diode (D1) negative pole is connected as output with the second diode (D2) negative pole.
2. power supply and powered battery automatic switch-over circuit in electronic switch as claimed in claim 1 is characterized in that: described the first diode (D1) and the second diode (D2) are during for silicon diode, and its conduction voltage drop is 0.7V.
3. power supply and powered battery automatic switch-over circuit in electronic switch as claimed in claim 1 is characterized in that: described the first diode (D1) and the second diode (D2) are during for germanium diode, and its conduction voltage drop is 0.3V.
4. power supply and powered battery automatic switch-over circuit in electronic switch as claimed in claim 1, it is characterized in that: the supply voltage of described civil power after step-down, rectification, voltage stabilizing is than the high 0.3～1.0V of cell voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742722 CN202997691U (en) | 2012-12-28 | 2012-12-28 | An automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742722 CN202997691U (en) | 2012-12-28 | 2012-12-28 | An automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997691U true CN202997691U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220742722 Expired - Fee Related CN202997691U (en) | 2012-12-28 | 2012-12-28 | An automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134445A (en) * | 2017-12-28 | 2018-06-08 | 东本电气科技(苏州)有限公司 | Farad capacitor drives valving under low pressure |
-
2012
- 2012-12-28 CN CN 201220742722 patent/CN202997691U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134445A (en) * | 2017-12-28 | 2018-06-08 | 东本电气科技(苏州)有限公司 | Farad capacitor drives valving under low pressure |
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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: 20130612 Termination date: 20151228 |
|
| EXPY | Termination of patent right or utility model |