CN201004076Y - Power grid voltage detection circuit - Google Patents
Power grid voltage detection circuit Download PDFInfo
- Publication number
- CN201004076Y CN201004076Y CNU2006200177144U CN200620017714U CN201004076Y CN 201004076 Y CN201004076 Y CN 201004076Y CN U2006200177144 U CNU2006200177144 U CN U2006200177144U CN 200620017714 U CN200620017714 U CN 200620017714U CN 201004076 Y CN201004076 Y CN 201004076Y
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- winding
- power transformer
- circle
- detection circuit
- voltage detection
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Abstract
The utility model includes a power, a power transformer and a low voltage inductor. The primary winding of the power transformer realizes tapping at the N1 circle, and the rest primary windings realize tapping at the N2 circle, making the two ends of the primary winding of the low voltage inductor are connected with the two ends of the rest N2 circle of the primary winding group of the power transformer, while the division voltages at the two ends of the N1 circle winding and the N2 circle winding maintains, thereby achieving the function of voltage reducing and insolating by use of the low voltage inductor. Having a middle-low voltage inductor with a small volume, the utility model promises a low price but no loss of precision, greatly reducing the producing cost in the same function requirements.
Description
Technical field
The utility model relates to a kind of network voltage detection circuit, particularly a kind of low-cost line voltage real-time detection circuit.
Background technology
Along with the extensive of electrical appliance popularized, line voltage is along with the variation of load is increasing to the influence of consumer, for stability and the reliability that improves electric equipment work, the real-time detection of line voltage more and more is applied in the intelligent controller field.
For non-electrical isolation circuit, voltage detecting is very easy; For the electrical isolation circuit, generally adopt high-voltage mutual inductor.As shown in Figure 2, the elementary winding of high-voltage mutual inductor 103 is connected to power supply 106 two ends, the secondary winding two ends of high-voltage mutual inductor 103 are connected in a current rectifying and wave filtering circuit 105, described current rectifying and wave filtering circuit 105 output terminal connection function circuit 104, current rectifying and wave filtering circuit 105 can transfer detected ac voltage signal to the discernible d. c. voltage signal of single-chip microcomputer, and described d. c. voltage signal is delivered to functional circuit 104.
The problem that above-mentioned network voltage detection circuit exists is, the high-voltage mutual inductor price is relatively costly, and volume is also bigger, has caused high production cost.
The utility model content
The utility model is promptly put in view of the above problems and is proposed, and purpose is to provide a kind of can realize voltage isolation, can realize voltage detecting again, low-cost, high-precision network voltage detection circuit.
For reaching above-mentioned purpose, the utility model comprises power supply, power transformer, low tension sensor.In elementary winding N1 circle place's tap of power transformer, remain elementary winding N2 circle, make the elementary winding two ends of low tension sensor be connected in the remaining N2 circle of the elementary winding two ends of power transformer, and N1 circle winding, N2 circle winding two ends partial pressure value remain unchanged.So can realize the effect of step-down, isolation by the low tension sensor.
The utility model mesolow inductor volume is little, price is low does not lose precision again, greatly reduces production cost under same functional requirement.
Description of drawings
Fig. 1 is the circuit diagram of network voltage detection circuit of the present utility model;
Fig. 2 is the circuit diagram of conventional network voltage detection circuit.
Embodiment
As shown in Figure 1, the utility model comprises power supply 106, power transformer 101, low tension sensor 102.Elementary winding N1 circle place's tap at power transformer 101, remain elementary winding N2 circle, make the elementary winding two ends of low tension sensor 102 be connected in the remaining N2 circle of the elementary winding two ends of power transformer 101, and N1 circle winding, N2 circle winding two ends partial pressure value remain unchanged.So can realize the effect of step-down, isolation by low tension sensor 102.
Low pressure mutual inductor 102 secondary winding connect a current rectifying and wave filtering circuit 105, its output terminal linkage function circuit 104: functional circuit 104 can be illustrated as electrical equipment Based Intelligent Control plate, it includes circuit units such as intelligent controller, current rectifying and wave filtering circuit 105 can be converted to the discernible d. c. voltage signal of intelligent controller through arrangement, filtering clutter with ac voltage signal, is finished the processing behind the line voltage real-time sampling by intelligent controller.Functional circuit 104 also can utilize the input voltage of power transformer 101 secondary winding to realize functions such as demonstration, driving except that the d. c. voltage signal that can handle current rectifying and wave filtering circuit 105 conversion inputs.Current rectifying and wave filtering circuit 105, functional circuit 104 are known circuit, so present embodiment is not described its circuit framework in detail.
In the present embodiment, power supply 106 power taking U are the 220V alternating current, be to reduce the internal resistance of N2 circle winding, also need guarantee N2＜＜N1, N2 circle winding both end voltage U1 is at least 5V.Low tension sensor 102 adopts 1: 1 winding, and elementary rated voltage design load is greater than 4 times of U1, to guarantee accuracy of detection.
Claims (4)
1, a kind of network voltage detection circuit, comprise power supply, power transformer, low tension sensor, it is characterized in that, lead is drawn at the place in the suitable number of turn of the elementary winding of described power transformer, connect elementary winding one end of described low tension sensor, make the elementary winding two of described low tension sensor be terminated at the elementary winding residue of described power transformer number of turn two ends, reflect the variation of line voltage according to a certain percentage.
2, a kind of network voltage detection circuit according to claim 1 is characterized in that, the suitable number of turn place number of windings of the elementary winding of described power transformer should be much larger than the residue number of windings.
3, a kind of network voltage detection circuit according to claim 2 is characterized in that, the residue winding both end voltage of the elementary winding of described power transformer is at least 5 volts.
According to claim 2 or 3 described a kind of network voltage detection circuit, it is characterized in that 4, described low tension sensor adopts 1: 1 winding, and its elementary rated voltage design load is greater than the residue winding both end voltage of 4 times the elementary winding of described power transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200177144U CN201004076Y (en) | 2006-08-10 | 2006-08-10 | Power grid voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200177144U CN201004076Y (en) | 2006-08-10 | 2006-08-10 | Power grid voltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201004076Y true CN201004076Y (en) | 2008-01-09 |
Family
ID=39039617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200177144U Expired - Fee Related CN201004076Y (en) | 2006-08-10 | 2006-08-10 | Power grid voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201004076Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735909A (en) * | 2011-04-01 | 2012-10-17 | 台达电子工业股份有限公司 | Voltage detection circuit of light-emitting diode (LED) string light and detection method thereof |
| CN110333402A (en) * | 2019-05-23 | 2019-10-15 | 广西电网有限责任公司 | A kind of user's electric voltage exception cognitive method and system based on edge calculations |
-
2006
- 2006-08-10 CN CNU2006200177144U patent/CN201004076Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735909A (en) * | 2011-04-01 | 2012-10-17 | 台达电子工业股份有限公司 | Voltage detection circuit of light-emitting diode (LED) string light and detection method thereof |
| CN110333402A (en) * | 2019-05-23 | 2019-10-15 | 广西电网有限责任公司 | A kind of user's electric voltage exception cognitive method and system based on edge calculations |
| CN110333402B (en) * | 2019-05-23 | 2021-10-29 | 广西电网有限责任公司 | User voltage abnormity sensing method and system based on edge calculation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Wu Cong Document name: Notification of authorisation and registration |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN TOPBAND CO.,LTD Free format text: FORMER NAME: SHENZHEN TOPBAND ELECTRONICS + TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 4, B building, Shenzhen District, Gao Xin Village, Nanshan District, Guangdong 518000, China Patentee after: Shenzhen Topband Co., Ltd. Address before: 4, B building, Shenzhen District, Gao Xin Village, Nanshan District, Guangdong 518000, China Patentee before: Tuobang Electronic Science and Technology Co., Ltd., Shenzhen City |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20120810 |