CN2753032Y - Overheat protection controller - Google Patents
Overheat protection controller Download PDFInfo
- Publication number
- CN2753032Y CN2753032Y CN 200420110397 CN200420110397U CN2753032Y CN 2753032 Y CN2753032 Y CN 2753032Y CN 200420110397 CN200420110397 CN 200420110397 CN 200420110397 U CN200420110397 U CN 200420110397U CN 2753032 Y CN2753032 Y CN 2753032Y
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- CN
- China
- Prior art keywords
- circuit
- operational amplification
- protection controller
- amplification circuit
- thermistor
- 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 Electric Motors In General (AREA)
Abstract
The utility model relates to an over-heat protection controller which is connected with a control return circuit of an electric apparatus, and the control return circuit of the electric apparatus is electrically connected with controlled equipment, such as a motor and a mechanical device. The over-heat protection controller also comprises a voltage-reducing rectification circuit, a voltage-stabilizing filter circuit, an operational amplification circuit, an amplifier circuit and a thermistor which are electrically connected in series, wherein an output terminal of the voltage-reducing rectification circuit is connected with the voltage-stabilizing filter circuit connected with an input terminal of a positive phase of the operational amplification circuit; one end of the thermistor is connected with the voltage-stabilizing filter circuit, and the other end is connected with an input terminal of a reverse phase of the operational amplification circuit, an output terminal of the operational amplification circuit passes through the amplification circuit and the control return circuit of the electric apparatus. The change of the resistance value of the thermistor makes the input terminals of the reverse phase and the positive phase of the operational amplification circuit lose balance, and the control return circuit of the electric apparatus is switched on or switched off by the output change; thus, the controlled equipment is controlled to work or stop working.
Description
Technical field
The utility model relates to the protection controller, particularly is installed on the controlled plants such as motor and plant equipment the overfire protection controller of the control of the temperature of the overtemperature situation of monitor full time operational outfit, monitoring.
Background technology
Temperature can rise during plant equipment long-plays such as motor, perhaps, machinery when continuous operation as oil-break (being meant lubricating oil) occurring, cut off the water supply (being meant cooling water) mechanical fatigue fault etc., the overheating problem of appearance, when directly threatening plant equipment safety, stop this equipment at once.There is not the installation and control monitor but existing motor has, can't guarantee the fail safe of equipment, and, the heating situation in the time of can not implementing this equipment operation of continuous detecting, as exceed design temperature and send at once and report to the police or the fault of stopping, thereby can't guarantee the safety and economic operation of equipment.
The utility model content
The purpose of this utility model is to provide a kind of motor and mechanical overfire protection controller, but the heating situation during the continuous detecting equipment operation as exceed design temperature and send at once and report to the police or the fault of stopping, thereby guarantee the safety and economic operation of equipment.
For this reason, the utility model adopts following technical scheme: overfire protection controller is connected in the electrical equipment control loop that electrically connects mutually with controlled plants such as motor and plant equipment; Also comprise the step-down rectifying circuit, filter circuit of pressure-stabilizing, operational amplification circuit, amplifying circuit and the thermistor that are electrically connected successively; The step-down rectifying circuit output connects filter circuit of pressure-stabilizing, filter circuit of pressure-stabilizing concatenation operation amplifying circuit inverting input; Thermistor one end is connected in filter circuit of pressure-stabilizing, and the other end is connected in the operational amplification circuit normal phase input end, and the operational amplification circuit output is by amplifying circuit and electrical equipment control loop; The resistance of thermistor changes, and the positive inverting input that makes operational amplification circuit is with regard to disequilibrium, and output changes, and makes opening/stopping of conducting of electrical equipment control loop or cut-out and then control controlled plant.
Further, described electrical equipment control loop comprises relay and is attached thereto electric bell, the normally closed switch that connects; The contact of this relay is an open mode.
Described step-down rectifying circuit is a bridge rectifier.
Also comprise a display unit, this display unit is electrically connected on the operational amplification circuit output.
Described display unit is a light-emitting diode.
Also comprise the button that relay coil is connected, press the button the relay coil adhesive, the normally closed switch that is connected with electric bell is opened, electric bell cuts off the power supply and stops sounding.
Also comprise indicator light, be connected in parallel in electric bell.
Temperature sensor of the present utility model adopts thermistor, be installed on the controlled plant equipment, along with the temperature that plant equipment is produced when moving is sampled, thermistor itself makes the size variation of resistance value along with the variation of mechanical temperature simultaneously, transferring signals to operational amplifier again compares and enlarges, operational amplifier output is arranged again, amplify the pusher motor type relay through next utmost point; The control loop that the relay control apparatus is arranged again.
Advantage of the present utility model:
1. practicality is wide, and it can be to the controlled plant of needs as motor, gearing, and the real-time Monitoring and Controlling during overtemperatures such as transformer can stop the operation of faulty equipment in case of necessity automatically.
2. adaptability is strong, and the utility model is not subjected to any ambient temperature and humidity effect, and the temperature measurement location of controlled plant can be installed arbitrarily, (sample position of the quick resistance of available silica gel stationary heat) but also
Has shockproof function.
3. have a bright future, the utility model just can be made various types of controllers such as infra-red alarm, signal amplifier, acoustic control or the like as improving a little.
Description of drawings
Fig. 1 is an electrical schematic of the present utility model;
Fig. 2 is an electrical equipment control of the present utility model loop electrical schematic.
Embodiment
Please see Figure 1, overfire protection controller of the present utility model, be connected in the electrical equipment control loop 5 that electrically connects mutually with controlled plants such as motor and plant equipment, also comprise the step-down rectifying circuit 1, filter circuit of pressure-stabilizing 2, operational amplification circuit 3, amplifying circuit 4 and the thermistor Rt that are electrically connected successively; Step-down rectifying circuit 1 output connects filter circuit of pressure-stabilizing 2, filter circuit of pressure-stabilizing 2 concatenation operation amplifying circuits 3 inverting inputs; Thermistor Rt one end is connected in filter circuit of pressure-stabilizing 2, and the other end is connected in operational amplification circuit 3 normal phase input ends, and operational amplification circuit 3 outputs are by amplifying circuit 4 and electrical equipment control loop; The resistance of thermistor Rt changes, and the positive inverting input that makes operational amplification circuit 3 is with regard to disequilibrium, and output changes, and makes opening/stopping of 5 conductings of electrical equipment control loop or cut-out and then control controlled plant; Described electrical equipment control loop 5 comprises relay J and is attached thereto electric bell DL, the normally closed switch Z that connects; The contact of this relay J is an open mode; Described step-down rectifying circuit 1 is a bridge rectifier; Also comprise a display unit, this display unit is electrically connected on operational amplification circuit 3 outputs; Described display unit is a LED; Also comprise the button AN that relay coil is connected, press the button AN, the adhesive of relay J coil is opened the normally closed switch Z that is connected with electric bell DL, and electric bell DL cuts off the power supply and stops sounding; Also comprise indicator light ZSD, be connected in parallel in electric bell DL.
The course of work is as follows, and 220 volts of voltages are loaded into the elementary of step-down transformer, by secondary output, after the DX4 full-bridge rectification, by capacitor C filtering, passes through voltage stabilizing circuit WY voltage stabilizing again, supplies with the working power of back circuit; R2 and Rw and Rt and R3 form the positive inverting input of operational amplification circuit 3--IC in the circuit.When the mechanical movement overtemperature, the resistance of thermistor Rt can change, in case exceed setting range, the positive inverting input of operational amplification circuit 3--IC is with regard to disequilibrium, the output of last IC will change, there is adhesive that amplifying circuit 4-amplifying triode BG comes control relay J whether again, and then the opening/stop of 5 pairs of fault machineries of control apparatus control loop.
Please see Figure 2 again, L.N represents the working power of electrical equipment control schematic diagram respectively, and controlled plant is when normal operation, and open the contact of relay J, the relay J closing of contact when the controlled plant overtemperature, and indicator light ZSD lights, and electric bell DL also sounds simultaneously; Can click also that AN relay coil Z inhales and, the normally-closed contact Z in electric bell DL circuit front opens, electric bell DL outage and stop sounding.It must be noted that the controlled plant overtemperature do not remove, although electric bell does not ring indicator light ZSD light yellow.After having only the controlled plant overtemperature to remove, indicator light ZSD just can extinguish.
Claims (7)
1. overfire protection controller, be connected in the electrical equipment control loop that electrically connects mutually with controlled plants such as motor and plant equipment, it is characterized in that, also comprise the step-down rectifying circuit, filter circuit of pressure-stabilizing, operational amplification circuit, amplifying circuit and the thermistor that are electrically connected successively; The step-down rectifying circuit output connects filter circuit of pressure-stabilizing, filter circuit of pressure-stabilizing concatenation operation amplifying circuit inverting input; Thermistor one end is connected in filter circuit of pressure-stabilizing, and the other end is connected in the operational amplification circuit normal phase input end, and the operational amplification circuit output is by amplifying circuit and electrical equipment control loop; The resistance of thermistor changes, and the positive inverting input that makes operational amplification circuit is with regard to disequilibrium, and output changes, and makes opening/stopping of conducting of electrical equipment control loop or cut-out and then control controlled plant.
2. overfire protection controller as claimed in claim 1 is characterized in that, described electrical equipment control loop comprises relay and is attached thereto electric bell, the normally closed switch that connects; The contact of this relay is an open mode.
3. overfire protection controller as claimed in claim 1 is characterized in that, described step-down rectifying circuit is a bridge rectifier.
4. overfire protection controller as claimed in claim 1 is characterized in that, also comprises a display unit, and this display unit is electrically connected on the operational amplification circuit output.
5. overfire protection controller as claimed in claim 1 is characterized in that, described display unit is a light-emitting diode.
6. overfire protection controller as claimed in claim 1 is characterized in that, also comprises the button that is connected with relay coil, presses the button the relay coil adhesive, and the normally closed switch that is connected with electric bell is opened, and electric bell cuts off the power supply and stops sounding.
7. overfire protection controller as claimed in claim 1 is characterized in that, also comprises indicator light, and this indicator light is connected in parallel in electric bell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420110397 CN2753032Y (en) | 2004-11-26 | 2004-11-26 | Overheat protection controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420110397 CN2753032Y (en) | 2004-11-26 | 2004-11-26 | Overheat protection controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753032Y true CN2753032Y (en) | 2006-01-18 |
Family
ID=35914442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420110397 Expired - Fee Related CN2753032Y (en) | 2004-11-26 | 2004-11-26 | Overheat protection controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753032Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280772A (en) * | 2013-06-13 | 2013-09-04 | 成都联腾动力控制技术有限公司 | Motor controller overheating judgment and protection circuit |
| CN104901274A (en) * | 2015-06-12 | 2015-09-09 | 林碧琴 | Self-power-off circuit |
| CN109209968A (en) * | 2016-10-12 | 2019-01-15 | 何凡 | Used in air exchange fan voltage adjusting type energy-saving control circuit |
-
2004
- 2004-11-26 CN CN 200420110397 patent/CN2753032Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280772A (en) * | 2013-06-13 | 2013-09-04 | 成都联腾动力控制技术有限公司 | Motor controller overheating judgment and protection circuit |
| CN104901274A (en) * | 2015-06-12 | 2015-09-09 | 林碧琴 | Self-power-off circuit |
| CN109209968A (en) * | 2016-10-12 | 2019-01-15 | 何凡 | Used in air exchange fan voltage adjusting type energy-saving control circuit |
| CN109209967A (en) * | 2016-10-12 | 2019-01-15 | 何凡 | A kind of used in air exchange fan voltage adjusting type energy-saving control circuit |
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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 |