CN2167467Y - Single-phase electric motor protector - Google Patents
Single-phase electric motor protector Download PDFInfo
- Publication number
- CN2167467Y CN2167467Y CN 93218228 CN93218228U CN2167467Y CN 2167467 Y CN2167467 Y CN 2167467Y CN 93218228 CN93218228 CN 93218228 CN 93218228 U CN93218228 U CN 93218228U CN 2167467 Y CN2167467 Y CN 2167467Y
- Authority
- CN
- China
- Prior art keywords
- nand gate
- resistance
- connect
- diode
- electric motor
- 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
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- Control Of Direct Current Motors (AREA)
Abstract
The utility model relates to a single-phase electric motor protector. Through rectifying for the alternating current, utilizing the detection of the working condition of a single-phase electric motor which is connected to comprise elements of a current mutual inductor, a stable integration, a digital integration, a controllable silicon, a relay, etc., when the electric motor generates overvoltage or overload fault, actions of audible and visual alarm, cutting off the electric power source, etc., are generated. The electric motor can not be burned out because of the overvoltage or overload. The purpose of protecting the electric motor is reached. The utility model has the advantages of simple circuit, and high insurance rate. The utility model is the protector which is suitable for the dynamic force using the single-phase electric motor as the dynamic force machinery.
Description
The utility model belongs to a kind of protective device in the electricity.
Existing monophase machine protection mainly contains overvoltage or earth leakage protective, and these protective device function singlenesses are used inconvenience.
The utility model provides a kind of have overvoltage, overload protection, has the monophase machine protector of acoustic-optic alarm concurrently.
The utility model is achieved in that connecting protective circuit on rectification circuit forms, and protective circuit is by five resistance R
1-R
5, two semifixed resistor W
1, W
2, five diode D
1-D
5, two capacitor C
1, C
2And instrument transformer T, stablize elements such as integrated, numeral integrated (NAND gate A, B, C, D), controllable silicon SCR, relay J, musical film IC and piezoelectric ceramic HID and connect and compose, stablize an integrated end to be connected with rectification circuit, and and resistance R
1, semifixed resistor W
1Series connection back ground connection is stablized the integrated other end and resistance R
2, diode D
2, musical film IC, resistance R
3, R
4, R
5An end connect successively respectively, the other end of semifixed resistor W1 is connected with NAND gate B, D, and 1 line of instrument transformer T is succeeded appliance contact and connect AC power after J.1, and 2 lines are connected with motor D, another relay contact that joins of motor connects AC power, 3,4 lines and the diode D of instrument transformer T after J.2
1, capacitor C
1Parallel connection, 4 line ground connection, diode D
1Negative pole and capacitor C
1Positive pole connect back and semifixed resistor W
2An end connect W
2Another termination NAND gate A, at semifixed resistor W
2And connect capacitor C between the NAND gate A
2Positive pole, C
2Minus earth, resistance R
2The other end join with the input of NAND gate A, B, D respectively, the output of NAND gate A, B inserts NAND gate C respectively, the G utmost point of the output termination controllable silicon SCR of NAND gate C, the A utmost point of SCR is connected with musical film IC, K utmost point ground connection, at the two ends of musical film IC piezoelectric ceramic HID in parallel, diode D
2Positive pole with after relay J is connected, through light-emitting diode D
3, connecting resistance R
3, the output sending and receiving optical diode D of NAND gate D
4Back and resistance R
4Connect resistance R
5The other end insert light-emitting diode D
5Back ground connection.
The utility model is further described with embodiment below in conjunction with description of drawings:
Fig. 1 is a monophase machine protector circuit diagram.
Main element parameter among the figure is: R
1Be 8-10K, R
2-R
5Be 500 Ω, W
1Be 50K-100K, W
2Be 20K-40K, C
1-C
2Be 4-10uF16/V, D
1-D
2Be 1N004, D
3-D
5Be φ 5 light-emitting diodes, stable set becomes 7824, and set of digits becomes NAND gate circuit TC4011BP, and SCR is 2A250, and J is 220V * 10A, and T is epoxy iron stamen, color painting wire coiling.
This protector is when the motor operate as normal, and the signal that the instrument transformer T of protective circuit induces is through diode D
1Rectification, capacitor C
1Be added in semifixed resistor W after being filtered into direct current signal
2On, by the NAND gate A circuit of the integrated TC4011BP of signal input digit of its taking-up, at this moment, the output of NAND gate A is a high level; Perhaps just often, semifixed resistor W at supply voltage
1The voltage that is taken out can not make NAND gate B conducting, the output of NAND gate B is a high level 1, according to NAND gate formula: I=X.Y=0.1=0=1, so, above-mentioned two kinds of situations, the output of NAND gate C is low level 0, can not trigger the controllable silicon SCR conducting, relay J is failure to actuate, relay contact J.1 or J.2 normally closed energising, motor D is normally moved.
But when overload appearred in motor D, the motor D electric current increased, and the electric current of process instrument transformer T increases thereupon, and the signal that induces also increases, through diode D
1Rectification, capacitor C
1Add to the integrated NAND gate A of numeral after the filtering, make NAND gate A become conducting by ending, output transfers low level 0 to by high level 1; Perhaps when the supply voltage rising, the voltage of protective circuit increases, semifixed resistor W
1The voltage of last taking-up also raises; add to the integrated NAND gate B of numeral, make NAND gate B become conducting by ending, its output becomes low level 0 by high level 1; two kinds of faults of above-mentioned appearance; all make the output of NAND gate C become high level 1, according to NAND gate formula: I=X.Y=0.1=0=1, can trigger the controllable silicon SCR conducting this moment; relay J is switched on power supply and moves; J.1 or J.2 relay contact disconnects, and motor promptly shuts down, thereby is protected.
In addition the aspect is when controllable silicon SCR is triggered conducting, relay J
1Receive power supply, musical film IC and light-emitting diode D
3, D
4Or D
5Obtain power supply and send sound and light alarm; the staff is a powered-down; after waiting to fix a breakdown; connect with the mains, can rework, the advantage of this protector: circuit is simple; fault one takes place and can cut off the power supply; and have sound and light alarm, rate of premium to reach very, be applicable to the mechanical motor protection that various use monophase machines are used as power.
Claims (1)
1, a kind of monophase machine protector is to be connected to form by rectification circuit and protective circuit, it is characterized in that protective circuit is by five resistance R
1-R
5, two semifixed resistor W
1, W
2, five diode D
1-D
5, two capacitor C
1, C
2With instrument transformer T, stablize integrated, numeral integrated (NAND gate A, B, C, D), controllable silicon SCR, relay J, musical film IC, piezoelectric ceramic HID etc. connect and compose, stablize an integrated end to be connected with rectification circuit input end, and and resistance R
1, semifixed resistor W
1Ground connection after being connected in series is stablized the integrated other end and resistance R
2, diode D
2, musical film IC, resistance R
3, R
4, R
5An end connect respectively semifixed resistor W successively
1Other end NAND gate B, D connect, 1 line of instrument transformer T is succeeded appliance contact J
1After connect AC power, 2 lines are connected with motor D, another line of motor is succeeded appliance contact J
2After connect AC power, 3,4 lines and the diode D of instrument transformer T
1, capacitor C
1Parallel connection, 4 line ground connection, diode D
1Negative pole and capacitor C
1Positive pole connect semifixed resistor W
2One end, W
2Another termination NAND gate A, at semifixed resistor W
2And insert capacitor C between the NAND gate A
2Positive pole, C
2Minus earth, resistance R
2The other end respectively the input of NAND gate A, B, D join, NAND gate A, B insert NAND gate C respectively, the G utmost point of the output termination controllable silicon SCR of NAND gate C, the A utmost point of controllable silicon SCR is connected with musical film IC, K utmost point ground connection is at the two ends of musical film IC piezoelectric ceramic HID in parallel, diode D
2Positive pole be connected through light-emitting diode D with relay J
3Connecting resistance R
3, the output light-emitting diode D of NAND gate D
4Back and resistance R
4Connect resistance R
5The other end insert light-emitting diode D
5Back ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93218228 CN2167467Y (en) | 1993-07-07 | 1993-07-07 | Single-phase electric motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93218228 CN2167467Y (en) | 1993-07-07 | 1993-07-07 | Single-phase electric motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2167467Y true CN2167467Y (en) | 1994-06-01 |
Family
ID=33797947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93218228 Expired - Fee Related CN2167467Y (en) | 1993-07-07 | 1993-07-07 | Single-phase electric motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2167467Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955064A (en) * | 2011-08-23 | 2013-03-06 | 苏州常乐泡塑有限公司 | Alarm for reactor motor |
| CN109599839A (en) * | 2019-01-14 | 2019-04-09 | 深圳和而泰智能控制股份有限公司 | A kind of protection circuit and blender |
-
1993
- 1993-07-07 CN CN 93218228 patent/CN2167467Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955064A (en) * | 2011-08-23 | 2013-03-06 | 苏州常乐泡塑有限公司 | Alarm for reactor motor |
| CN109599839A (en) * | 2019-01-14 | 2019-04-09 | 深圳和而泰智能控制股份有限公司 | A kind of protection circuit and blender |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |