CN201004076Y - Power grid voltage detection circuit - Google Patents

Power grid voltage detection circuit Download PDF

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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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CN
China
Prior art keywords
winding
power transformer
circle
detection circuit
voltage detection
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.)
Expired - Fee Related
Application number
CNU2006200177144U
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Chinese (zh)
Inventor
谷虎
马善松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Topband Co Ltd
Original Assignee
TUOBANG ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TUOBANG ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY filed Critical TUOBANG ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY
Priority to CNU2006200177144U priority Critical patent/CN201004076Y/en
Application granted granted Critical
Publication of CN201004076Y publication Critical patent/CN201004076Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

The network voltage detection circuit
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.
CNU2006200177144U 2006-08-10 2006-08-10 Power grid voltage detection circuit Expired - Fee Related CN201004076Y (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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