CN202395429U - Thermal protection device for motor - Google Patents

Thermal protection device for motor Download PDF

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Publication number
CN202395429U
CN202395429U CN2011205125912U CN201120512591U CN202395429U CN 202395429 U CN202395429 U CN 202395429U CN 2011205125912 U CN2011205125912 U CN 2011205125912U CN 201120512591 U CN201120512591 U CN 201120512591U CN 202395429 U CN202395429 U CN 202395429U
Authority
CN
China
Prior art keywords
motor
ptc
contactor
coil
controller
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
CN2011205125912U
Other languages
Chinese (zh)
Inventor
蔡林杰
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.)
TONGKUN GROUP ZHEJIANG HENGSHENG CHEMICAL FIBRE CO Ltd
Original Assignee
TONGKUN GROUP ZHEJIANG HENGSHENG CHEMICAL FIBRE CO Ltd
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 TONGKUN GROUP ZHEJIANG HENGSHENG CHEMICAL FIBRE CO Ltd filed Critical TONGKUN GROUP ZHEJIANG HENGSHENG CHEMICAL FIBRE CO Ltd
Priority to CN2011205125912U priority Critical patent/CN202395429U/en
Application granted granted Critical
Publication of CN202395429U publication Critical patent/CN202395429U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a thermal protection device for a motor, which comprises a motor and a contactor, as well as a PTC (Positive Temperature Coefficient) controller and a PTC thermal resistor capable of measuring the temperature of a motor stator coil, wherein the motor is connected with a power line by contacts of the contactor, the PTC controller is provided with a power supply input end, a signal input end, a normally opening end and a normally closed end, the power supply input end is connected with the power line by a switch, the signal input end is connected with the PTC thermal resistor by a shielding line, the normally opening end is grounded by an alarm light, and the normally closed end is grounded by a control button and the coil of the contactor. For the thermal protection device for the motor, when the temperature of the motor stator is abnormally increased, the normally opening end of the PTC controller is powered on and the alarm light works, moreover, the normally closed end is powered off, the coil of the contactor is powered off and the motor stops working, so that the motor can be effectively protected in abnormal high temperature condition and can be prevented from being burnt.

Description

The motor heat protective device
Technical field
The utility model relates to a kind of protective device, especially a kind of motor heat protective device.
Background technology
Motor is used very extensively in commercial production.Motor is working long hours or circuit is easy to generate high temperature when unusual, causes stator coil to burn, and therefore needs supporting thermel protection device;
The electrical equipment that is used for the protection of common electric machine heat is at present all used thermal relay usually; The principle of thermal relay protection is to change the power supply that comes the break-make motor according to the electric current on the circuit; This is a kind of protection based on current of electric, and this mode is a kind of indirect protection, and effect is relatively poor; Almost do not have and carry out the hot motor heat protective device of protecting, therefore be necessary to invent a kind of motor heat protective device based on motor temperature according to temperature action
Summary of the invention
The purpose of the utility model is a kind of motor heat protective device of protecting better effects if that designs for the deficiency that solves above-mentioned technology, can be used for the unexpected adstante febre of common electric machine and cut off the electricity supply, and prevents burn-down of electric motor.
The motor heat protective device that the utility model designed; Comprise motor and contactor; This motor links to each other with power line through the contact of contactor, also comprises PTC controller and the PTC thermal resistance of measuring the coil of stator of motor temperature, and described PTC controller is provided with power input, signal input part, Chang Kaiduan and normal-closed end; Its power input links to each other with power line through switch; Its signal input part links to each other with the PTC thermal resistance through shielding conductor, and its Chang Kaiduan is through alarm lamp ground connection, and its normal-closed end is through the coil ground connection of control button and said contactor.
As preferably:
Described motor is provided with terminal box, is provided with stator coil in the motor, and described PTC thermal resistance is fixed in the connection box for motor, and the connecting terminal of motor box stretches into the coil of stator of motor edge, like this thermometric better effects if of PTC thermal resistance;
Said PTC controller is LT3SA module or INT69 module, the control better effects if.
The motor heat protective device of the utility model gained, the PTC thermal resistance is directly measured the motor stator temperature, and the contactor coil that links to each other with PTC controller normal-closed end during normality gets electric, and its closing of contact is normally moved motor; When motor stator temperature anomaly raises; The Chang Kaiduan of PTC controller gets the electric alarm lamp work that makes; Thereby its normal-closed end dead electricity makes the contactor coil dead electricity that motor is quit work, and motor just can be effectively protected when abnormal high temperature like this, prevents burn-down of electric motor; This is a kind of protective device based on motor temperature, heat protection better effects if.
Description of drawings
Fig. 1 is embodiment 1 structural representation;
Among the figure: the coil 8 of motor 1, contacts of contactor 2, power line 3, PTC controller 4, PTC thermal resistance 5, Chang Kaiduan 6, normal-closed end 7, contactor, control button 9, shielding conductor 10, alarm lamp 11.
Embodiment
Combine accompanying drawing that the utility model is done further to describe through embodiment below.
Embodiment 1:
As shown in Figure 1; The described motor heat protective device of present embodiment comprises motor 1 and contactor, and this motor links to each other with power line 3 through the contact 2 of contactor; Also comprise PTC controller 4 and the PTC thermal resistance 5 of measuring the coil of stator of motor temperature; Described PTC controller 4 is provided with power input, signal input part, Chang Kaiduan 6 and normal-closed end 7, and its power input links to each other with power line through switch, and its signal input part links to each other with PTC thermal resistance 5 through shielding conductor 10; Its Chang Kaiduan 6 is through alarm lamp 11 ground connection, and its normal-closed end 7 is through coil 8 ground connection of control button 9 and said contactor.Wherein: described motor is provided with terminal box, is provided with stator coil in the motor, and described PTC thermal resistance 5 is fixed in the connection box for motor, and the connecting terminal of motor box stretches into the coil of stator of motor edge, like this thermometric better effects if of PTC thermal resistance 5; Said PTC controller 4 is LT3SA module (also can be the INT69 modules)
The described motor heat protective device of present embodiment, PTC thermal resistance 5 are directly measured the motor stator temperature, and the contactor coil that links to each other with PTC controller 4 normal-closed ends 7 during normality gets electric, and its closing of contact is normally moved motor; When motor stator temperature anomaly raises; The Chang Kaiduan 6 of PTC controller 4 gets the electric alarm lamp work that makes; Thereby its normal-closed end 7 dead electricity make the contactor coil dead electricity that motor is quit work, and motor just can be effectively protected when abnormal high temperature like this, prevents burn-down of electric motor; This is a kind of protective device based on motor temperature, heat protection better effects if.
Specific embodiment described herein only is that the design to the utility model illustrates.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.

Claims (3)

1. motor heat protective device; Comprise motor and contactor; This motor links to each other with power line through the contact of contactor, it is characterized in that also comprising PTC controller and the PTC thermal resistance of measuring the coil of stator of motor temperature, and described PTC controller is provided with power input, signal input part, Chang Kaiduan and normal-closed end; Its power input links to each other with power line through switch; Its signal input part links to each other with the PTC thermal resistance through shielding conductor, and its Chang Kaiduan is through alarm lamp ground connection, and its normal-closed end is through the coil ground connection of control button and said contactor.
2. motor heat protective device according to claim 1; It is characterized in that described motor is provided with terminal box; Be provided with stator coil in the motor, described PTC thermal resistance is fixed in the connection box for motor, and the connecting terminal of motor box stretches into the coil of stator of motor edge.
3. motor heat protective device according to claim 1 and 2 is characterized in that said PTC controller is LT3SA module or INT69 module.
CN2011205125912U 2011-12-09 2011-12-09 Thermal protection device for motor Expired - Fee Related CN202395429U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205125912U CN202395429U (en) 2011-12-09 2011-12-09 Thermal protection device for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205125912U CN202395429U (en) 2011-12-09 2011-12-09 Thermal protection device for motor

Publications (1)

Publication Number Publication Date
CN202395429U true CN202395429U (en) 2012-08-22

Family

ID=46670331

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011205125912U Expired - Fee Related CN202395429U (en) 2011-12-09 2011-12-09 Thermal protection device for motor

Country Status (1)

Country Link
CN (1) CN202395429U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107269507A (en) * 2017-07-03 2017-10-20 佛山市顺德区海伦宝电器有限公司 A kind of water pump dry combustion method protection circuit
CN109638778A (en) * 2018-12-28 2019-04-16 国家电网有限公司 A kind of transformer protection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107269507A (en) * 2017-07-03 2017-10-20 佛山市顺德区海伦宝电器有限公司 A kind of water pump dry combustion method protection circuit
CN109638778A (en) * 2018-12-28 2019-04-16 国家电网有限公司 A kind of transformer protection circuit
CN109638778B (en) * 2018-12-28 2020-06-09 国家电网有限公司 Transformer protection circuit

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120822

Termination date: 20141209

EXPY Termination of patent right or utility model