CN101728816A - Motor overheat protector - Google Patents
Motor overheat protector Download PDFInfo
- Publication number
- CN101728816A CN101728816A CN200910066355A CN200910066355A CN101728816A CN 101728816 A CN101728816 A CN 101728816A CN 200910066355 A CN200910066355 A CN 200910066355A CN 200910066355 A CN200910066355 A CN 200910066355A CN 101728816 A CN101728816 A CN 101728816A
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- relay
- circuit
- triode
- normally closed
- series circuit
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Abstract
The invention discloses a motor overheat protector, relates to a motor protector, and aims to provide a motor overheat protector with low cost. The technical scheme of the motor overheat protector comprises that: a button AN1 and a normally closed interlock J2-1 are connected in series on the circuit of a phase power supply; the two ends of a relay normally opened interlock J1-2 circuit, a relay normally closed interlock J1-3 circuit, a button AN2 and a relay J1 circuit are connected with the normally closed interlock J2-1 and another phase power supply respectively; the two ends of a secondary coil of a step-down transformer are connected with the input end of a rectification circuit respectively; the two ends of a series circuit of a thermistor and an adjustable resistor R are connected with the output end of the rectification circuit; a base electrode of a triode T1 is connected with the sliding end of the adjustable resistor, and an emitting electrode of the triode T1 is connected with the base electrode of another triode T2; and collector electrodes of the triode T2 and the triode T1 are connected with a relay J. The motor overheat protector is used for motor overheat protection.
Description
Technical field:
The present invention relates to a kind of motor protecter, particularly a kind of motor overheat protector.
Background technology:
Motor particularly turns round for a long time because the temperature of motor is too high under hot environment, and burns out motor in long-time operation process, adopts existing motor protector, expense height.
Summary of the invention:
The purpose of this invention is to provide a kind of motor overheat protector with low cost.Technical scheme of the present invention is a kind of motor overheat protector, it is characterized in that: on the circuit of a phase power supply of three phase mains, be serially connected with from resetting normally closed button AN1 and relay normally closed interlock J2-1, the two ends of the series circuit of relay normally closed interlock J1-2 and red led respectively with normally closed interlock J2-1 with another mutually power supply be connected, following series circuit and relay normally closed interlock J1-2 and red led series circuit are in parallel: relay J 1-3 normally closed interlock and green indicating lamp series circuit, from normal moving button AN2 and the relay J 1 of opening that reset, the normally open contact J1-1 of relay J 1 is with above-mentioned in parallel from the automatic button AN2 that resets, the coil series circuit; Be serially connected with the normally open contact of relay J 1 on the circuit between motor and the three phase mains respectively; The primary coil of step-down transformer is connected with a two-phase power supply in the three phase mains, the two ends of its secondary coil are connected with the input of rectification circuit respectively, the two ends of thermistor and the series circuit of adjustable resistance R1 are connected with the output of rectification circuit, the series circuit of capacitor C and thermistor and adjustable resistance R1 is in parallel, the base stage of triode T1 is connected with the sliding end of adjustable resistance, its emitter is connected with the base stage of another triode T2, the collector electrode of the collector electrode of triode T2 and triode T1 is connected with an end of the coil of relay J 2 respectively, the other end of this coil is connected with an output of rectifier, the end of relay normally open contact J2-2 is connected with the other end of an output of rectifier and relay coil, its other end is connected with another output of rectifier, and the two ends of resistance R 2 are connected with an output of rectifier and the emitter of triode T2 respectively.The two ends of electric bell are connected with an output of rectification circuit and the end of relay normally open contact J2-2 respectively.The present invention has the remarkable advantage that overtemperature protection is effective and expense is low compared with the prior art.
Description of drawings:
Accompanying drawing is a motor overheat protector electrical schematic diagram of the present invention.
Embodiment:
In conjunction with above accompanying drawing the present invention is elaborated, the normally closed interlock J2-1 that is serially connected with on the phase power line in the three phase mains from reset stop button AN1 and relay J 2 is connected with relay J 1 with the start button AN2 that resets certainly that another is connected in series on power line mutually, the normally closed interlock J1-3 of the normally open contact J1-2 of relay J 1 and the series circuit of red led and relay J 1 and the series circuit of green indicating lamp are in parallel with above-mentioned series circuit from reset start button and relay J 1 coil respectively, are serially connected with the normally open contact of relay J 1 on the circuit between motor and the three phase mains respectively.The two ends of the primary coil of step-down transformer B1 are connected with C mutually with the A of three phase mains respectively, the two ends of its secondary coil are connected with the input of rectification circuit, the normally open contact J2-2 and the electric bell DL of relay J 2 on two circuit of output terminal of rectification circuit, have been connected in series, the two ends of capacitor C are connected with rectification circuit output end, the thermistor RT1 of three polyphones, RT2, the series circuit of RT3 and adjustable resistance R1 is in parallel with capacitor C, the sliding end of variable resistor R1 is connected with the base stage of triode T1, the emitter of T1 is connected with the base stage of another triode T2, one end of resistance R 2 is connected with the transmitter of T2, the other end is connected with rectification circuit one output, the collector electrode of T1 and T2 is connected with relay J 2 coils one end respectively, and the other end of J2 coil is connected with normally open contact J2-2.Above-mentioned three thermistors can be located at the higher place of motor temperature respectively.
Operation principle of the present invention is, press from resetting start button AN2, the J1 coil gets, the normally open contact closure of the J1 relay on the circuit between motor and the three phase mains, the motor start-up running, red led is bright, shows that motor runs well, when motor temperature is elevated to set temperature value, triode T1, the T2 conducting, relay J 2 coils get electric, normally open contact J2-2 closure, electric bell rings, relay normally closed interlock J2-1 disconnects simultaneously, relay J 1 coil losing electricity, and motor stops operating, relay normally closed interlock J1-3 and green indicating lamp are bright, the stall of expression motor.
Claims (2)
1. motor overheat protector, it is characterized in that: on the circuit of a phase power supply of three phase mains, be serially connected with from resetting normally closed button AN1 and relay normally closed interlock J2-1, the two ends of the series circuit of relay normally closed interlock J1-2 and red led respectively with normally closed interlock J2-1 with another mutually power supply be connected, following series circuit and relay normally closed interlock J1-2 and red led series circuit are in parallel: relay J 1-3 normally closed interlock and green indicating lamp series circuit, from normal moving button AN2 and the relay J 1 of opening that reset, the normally open contact J1-1 of relay J 1 is with above-mentioned in parallel from the automatic button AN2 that resets, the coil series circuit; Be serially connected with the normally open contact of relay J 1 on the circuit between motor and the three phase mains respectively; The primary coil of step-down transformer is connected with a two-phase power supply in the three phase mains, the two ends of its secondary coil are connected with the input of rectification circuit respectively, the two ends of thermistor and the series circuit of adjustable resistance R1 are connected with the output of rectification circuit, the series circuit of capacitor C and thermistor and adjustable resistance R1 is in parallel, the base stage of triode T1 is connected with the sliding end of adjustable resistance, its emitter is connected with the base stage of another triode T2, the collector electrode of the collector electrode of triode T2 and triode T1 is connected with an end of the coil of relay J 2 respectively, the other end of this coil is connected with an output of rectifier, the end of relay normally open contact J2-2 is connected with the other end of an output of rectifier and relay coil, its other end is connected with another output of rectifier, and the two ends of resistance R 2 are connected with an output of rectifier and the emitter of triode T2 respectively.
2. a kind of motor overheat protector as claimed in claim 1 is characterized in that: the two ends of electric bell are connected with an output of rectification circuit and the end of relay normally open contact J2-2 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910066355A CN101728816A (en) | 2009-10-23 | 2009-10-23 | Motor overheat protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910066355A CN101728816A (en) | 2009-10-23 | 2009-10-23 | Motor overheat protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101728816A true CN101728816A (en) | 2010-06-09 |
Family
ID=42449260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910066355A Pending CN101728816A (en) | 2009-10-23 | 2009-10-23 | Motor overheat protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101728816A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035179A (en) * | 2010-06-29 | 2011-04-27 | 河南省电力公司许昌供电公司 | Motor protector using positive temperature coefficient thermistor for protection |
| CN104124832A (en) * | 2014-07-30 | 2014-10-29 | 苏州淮通电气有限公司 | High-temperature power-off submersible pump |
| CN110391641A (en) * | 2019-07-22 | 2019-10-29 | 金陵科技学院 | Overheat protector for motor and motor overheating protect control method |
-
2009
- 2009-10-23 CN CN200910066355A patent/CN101728816A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035179A (en) * | 2010-06-29 | 2011-04-27 | 河南省电力公司许昌供电公司 | Motor protector using positive temperature coefficient thermistor for protection |
| CN104124832A (en) * | 2014-07-30 | 2014-10-29 | 苏州淮通电气有限公司 | High-temperature power-off submersible pump |
| CN110391641A (en) * | 2019-07-22 | 2019-10-29 | 金陵科技学院 | Overheat protector for motor and motor overheating protect control method |
| CN110391641B (en) * | 2019-07-22 | 2024-04-09 | 金陵科技学院 | Motor overheat protector and motor overheat protection control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100609 |