CN203180499U - A rectifier protecting circuit - Google Patents
A rectifier protecting circuit Download PDFInfo
- Publication number
- CN203180499U CN203180499U CN2013201439623U CN201320143962U CN203180499U CN 203180499 U CN203180499 U CN 203180499U CN 2013201439623 U CN2013201439623 U CN 2013201439623U CN 201320143962 U CN201320143962 U CN 201320143962U CN 203180499 U CN203180499 U CN 203180499U
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- China
- Prior art keywords
- rectifier
- relay
- mcu unit
- voltage
- civil power
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- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a rectifier protecting circuit. The rectifier protecting circuit is disposed between commercial power input and a rectifier and comprises a relay, a MCU unit, and a voltage sampling module. The relay is disposed between the commercial power input and the rectifier in order to control whether the commercial power supplies electricity for the rectifier. The control end of the relay is connected with the MCU unit. The voltage sampling module acquires a voltage signal of the commercial power input and transmits the voltage signal to the MCU unit. A standard voltage value is preset in the MCU unit and the relay is controlled to be disconnected by the MCU unit when the voltage signal is not within the range of the standard voltage value. When the voltage of the commercial power is beyond a setting range, the MCU unit controls the relay to operate, namely cuts off the relay, in order that the commercial power input cannot supply electricity for the rectifier. Therefore, the rectifier is guaranteed not to be damaged and thus the service life of the rectifier is increased.
Description
Technical field
The utility model relates to the protective circuit field, relates to a kind of rectifier protection circuit in particular, and it can carry out under-voltage, overvoltage and overheat protector to rectifier.
Background technology
In powerful electricity-saving lamp or fluorescent tube field, generally all need to use rectifier, this rectifier is arranged between electricity-saving lamp or fluorescent tube and the civil power, thereby the alternating current of 220V is converted into the direct current that can use for electricity-saving lamp or fluorescent tube.
But at present based on the deficiency of power grid construction etc., line voltage often is difficult to be stabilized in 220V always, but is in a state of fluctuation up and down.For rectifier, the input voltage that is rectifier is in a fluctuation status always, in case so the input voltage fluctuation amplitude is bigger, namely the minimum value of this input voltage maximum too small or this input voltage is excessive, tends to directly cause the damage of rectifier.
In view of this, the inventor has this case to produce at above-mentioned defective further investigation of the prior art then.
The utility model content
The purpose of this utility model is to provide a kind of rectifier protection circuit, to solve the problem that rectifier can damage because of the defective of mains input voltage shakiness in the prior art.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of rectifier protection circuit; wherein; be arranged between civil power input and the rectifier; this protective circuit comprises relay, MCU unit and voltage sampling module; this relay is arranged between civil power input and the rectifier whether to control civil power to rectifier power supply; the control end of this relay links to each other with the MCU unit; this voltage sampling module is taken out the voltage signal of civil power input and voltage signal is sent to the MCU unit, is preset with standard voltage value in this MCU unit and control relay disconnection when voltage signal is not in the standard voltage value.
Further, this protective circuit also comprises temperature detecting module, and this temperature detecting module links to each other with the MCU unit.
Further, this voltage sampling module is the resistor network that is connected between civil power live wire and the civil power zero line, is formed with the voltage sampling point in this resistor network, and this voltage sampling point links to each other with the MCU unit.
Further, this relay is the self-recovering type relay.
After adopting said structure; the utility model relates to a kind of rectifier protection circuit; this voltage sampling module is gathered the voltage signal of civil power input in real time; if the voltage signal that obtains is not in the standard voltage value scope; this MCU unit moves control relay, and namely block system relay makes that the civil power input can't be to rectifier power supply; and then guarantee that rectifier can not be damaged, and has improved the useful life of rectifier.
Description of drawings
The theory diagram of Fig. 1 a kind of rectifier protection circuit for the utility model relates to.
The physical circuit figure of Fig. 2 a kind of rectifier protection circuit for the utility model relates to.
Among the figure:
Civil power is imported 1 rectifier 2
Protective circuit 3 relays 31
Embodiment
In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.
As shown in Figure 1, a kind of rectifier protection circuit 3 that the utility model relates to, it is arranged between civil power input 1 and the rectifier 2, specifically comprises relay 31, MCU unit 32 and voltage sampling module 33.
This relay 31 is arranged between civil power input 1 and the rectifier 2, thereby whether the control civil power is to rectifier 2 power supplies, the control end of this relay 31 links to each other with MCU unit 32, so can be under the control of MCU unit 32, make relay 31 be communicated with or cut off circuit between civil power and the rectifier 2.
This voltage sampling module 33 is taken out the voltage signal of civil power input 1, and voltage signal is sent to MCU unit 32, be preset with standard voltage value in this MCU unit 32, when voltage signal is not in the standard voltage value, these MCU unit 32 control relays 31 disconnect, and namely switch the circuit path between civil power and the rectifier 2.These relay 31 preferred employing self-recovering type relays 31, thus can when returning to standard, recover automatically line voltage, thus allow rectifier 2 in time access in the civil power.
Preferably, in order to allow this protective circuit 3 can also be when rectifier 2 temperature surpass the certain predetermined value, the civil power that can automatically switch input 1, this protective circuit 3 also comprises temperature detecting module 34, this temperature detecting module 34 links to each other with MCU unit 32.
Particularly, as shown in Figure 2, a kind of embodiment as this voltage sampling module 33, this voltage sampling module 33 is for being connected the resistor network between civil power live wire and the civil power zero line, this resistor network comprises resistance R P3, resistance R P4 and resistance R P5, be formed with voltage sampling point P in this resistor network, this voltage sampling point P links to each other with MCU unit 32.
Like this; the utility model relates to a kind of rectifier 2 protective circuits 3; this voltage sampling module 33 is gathered the voltage signal of civil power input 1 in real time; if the voltage signal that obtains is not in the standard voltage value scope; this MCU unit 32 is with control relay 31 actions; it is block system relay 31; make that civil power input 1 can't be to rectifier 2 power supplies; and then guarantee that rectifier 2 can not be damaged; improved the useful life of rectifier 2; in structure shown in Figure 2, it guarantees that rectifier is operated in the voltage range of 150V-270V.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.
Claims (4)
1. rectifier protection circuit; it is characterized in that; be arranged between civil power input and the rectifier; this protective circuit comprises relay, MCU unit and voltage sampling module; this relay is arranged between civil power input and the rectifier whether to control civil power to rectifier power supply; the control end of this relay links to each other with the MCU unit; this voltage sampling module is taken out the voltage signal of civil power input and voltage signal is sent to the MCU unit, is preset with standard voltage value in this MCU unit and control relay disconnection when voltage signal is not in the standard voltage value.
2. a kind of rectifier protection circuit as claimed in claim 1 is characterized in that this protective circuit also comprises temperature detecting module, and this temperature detecting module links to each other with the MCU unit.
3. a kind of rectifier protection circuit as claimed in claim 1; it is characterized in that; this voltage sampling module is the resistor network that is connected between civil power live wire and the civil power zero line, is formed with the voltage sampling point in this resistor network, and this voltage sampling point links to each other with the MCU unit.
4. a kind of rectifier protection circuit as claimed in claim 1 is characterized in that, this relay is the self-recovering type relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201439623U CN203180499U (en) | 2013-03-27 | 2013-03-27 | A rectifier protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201439623U CN203180499U (en) | 2013-03-27 | 2013-03-27 | A rectifier protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180499U true CN203180499U (en) | 2013-09-04 |
Family
ID=49077159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201439623U Expired - Fee Related CN203180499U (en) | 2013-03-27 | 2013-03-27 | A rectifier protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203180499U (en) |
-
2013
- 2013-03-27 CN CN2013201439623U patent/CN203180499U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20210327 |