CN207638510U - A kind of motor winding temperature protection control circuit - Google Patents
A kind of motor winding temperature protection control circuit Download PDFInfo
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- CN207638510U CN207638510U CN201721785487.4U CN201721785487U CN207638510U CN 207638510 U CN207638510 U CN 207638510U CN 201721785487 U CN201721785487 U CN 201721785487U CN 207638510 U CN207638510 U CN 207638510U
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Abstract
The utility model belongs to motor control technology field, provides a kind of motor winding temperature protection control circuit.Motor winding temperature protection control circuit includes：Temperature-detecting device, temperature indicating device, intermediate relay and A.C. contactor；The temperature-detecting device is used to detect the temperature value of the machine winding；The motor winding temperature display device includes the first normal open switch contact that the first power port, second source port, the first high temperature port, the second high temperature port and the temperature value reach overtemperature trip value closure；Between first high temperature port and second high temperature port, the coil of the intermediate relay is connected between second high temperature port and the zero curve of power supply the first normal open switch contact portion；The problem of prior art is difficult to comprehensively protect the operational safety of machine winding, motor is caused to be easy to be damaged can be efficiently solved by the utility model.
Description
Technical field
The utility model belongs to motor control technology field more particularly to a kind of motor winding temperature protection control circuit.
Background technology
When motor in the process of running, all parts of motor will generate various energy losses, such as copper loss, iron loss, attached
Add loss etc., these energy are all converted into heat, and the temperature such as machine winding, iron core and bearing is caused to increase.Asynchronous motor
Permission Wen Sheng refer in certain environment temperature, for example environment temperature is 40 degrees Celsius, motor temperature and ambient temperature
Difference, it is that the insulating materials used in manufacture motor is determined, it is however generally that, the class of insulation of insulating materials is higher,
Then the corresponding heat resisting temperature of the insulating materials is also higher, for example, the temperature of different portion's motor nameplate mark is upgraded to 60 Kelvins, then says
When bright environment temperature is 40 degrees Celsius, the winding of motor is no more than 60 Kelvins.
However when motor is in overload or cooling defective mode, the temperature of machine winding is more than that its is specified quickly
Value, even if at this point, motor will not therefore and damage immediately can make if being chronically at over-temperature condition electrical machinery life because insulation accelerate it is old
Change and shortens.For example, motor made of A class F insulating material Fs, when motor winding temperature is than allowing Wen Sheng per high 8 degrees Celsius, electricity
Therefore the service life of machine will shorten half；Thus, the temperature of each component of correct measurement motor, and root in motor operation
It is particularly important according to the i.e. protection motor of measured temperature control.
Therefore, it is had at least the following problems in existing machine winding protection control circuit：The prior art is supplied by motor
Electrothermal relay is installed in electric line and carries out overload protection, electrothermal relay acts when electric current is excessive in circuit, interlocking excision motor
Power supply；But when motor supply line is normal, and motor is in cooling defective mode, motor temperature will be more than quickly
Its rated value will cause motor greatly to shorten its service life because insulating accelerated ageing.
Utility model content
The utility model provides a kind of motor winding temperature protection control circuit, it is intended to which solving the prior art can not be to motor
Winding realizes the problem of comprehensive overheat protector and motor are easy to be damaged due to high temperature.
The utility model first aspect provides a kind of motor winding temperature protection control circuit, including：Temperature-detecting device,
Temperature indicating device, intermediate relay and A.C. contactor；
Described temperature-detecting device one end connects the signal input terminal of the motor winding temperature display device, the other end
For connecting machine winding, the temperature value for detecting the machine winding；The motor winding temperature display device includes the
One power port, second source port, the first high temperature port, the second high temperature port and the temperature value reach overtemperature trip value
The first normal open switch contact being closed；First power port and first high temperature port are used to connect with the firewire of power supply
It connects, the zero curve connection of the second source port and power supply, the first normal open switch contact portion is in first temperature end
Between mouth and second high temperature port, the coil of the intermediate relay is connected to the zero of second high temperature port and power supply
Between line；
The normally-closed contact of the coil of the A.C. contactor and the intermediate relay is serially connected in the control loop of motor；
The main normally opened contact of the A.C. contactor is serially connected in the current supply circuit of motor, the start-stop for controlling motor.
Further, further include the first indicating module；
The motor winding temperature display device further includes：Third high temperature port, the 4th high temperature port and the temperature
Value reaches the second normal open switch contact of overtemperature alarm value closure；
The firewire of the wherein described third high temperature port and power supply connects, and the second normal open switch contact portion is described the
Between three high temperature ports and the 4th high temperature port, first indicating module is connected to the 4th high temperature port and power supply
Zero curve between.
Further, first indicating module is buzzer.
Further, the control loop further includes：Change-over switch, the first button switch, the second button switch, number control
System switch and electrothermal relay；
The change-over switch automatically enters end and manual input for being connect with the firewire of power supply, the change-over switch
Manual output end connect the first end of first button switch, the automatic output end of the change-over switch connects the number
Control the first end of switch, the second end and the friendship of the first end of second button switch and first button switch
Flow the auxiliary normally opened contact first end connection of contactor, the second end of second button switch, the digital control switch
Second end and the normally-closed contact first end of the electrothermal relay and the auxiliary normally opened contact second end of the A.C. contactor connect
It connects, the normally-closed contact second end of the electrothermal relay is connect with the first end of the normally-closed contact of the intermediate relay, the friendship
The coil first end of stream contactor is connect with the second end of the normally-closed contact of the intermediate relay, the line of the A.C. contactor
The zero curve for enclosing second end and power supply connects, and the coil tandem of the electrothermal relay is in the current supply circuit of motor.
Further, the control loop further includes：Second indicating module；
The coils from parallel connection of coils of second the instruction mould and the A.C. contactor.
Further, further include：Third indicating module；
The first end of the third indicating module with the firewire of power supply for connecting, the second end of the third indicating module
It is connect with the zero curve of power supply.
Further, further include：Fuse；
The first end of the fuse and the firewire of power supply connect, the second end of the fuse and the machine winding temperature
Spend the first power port and the connection of the first high temperature port of display device.
Further, the temperature-detecting device is thermocouple or resistance detector.
Acquired advantageous effects are the utility model compared with the existing technology：It is protected in above-mentioned motor winding temperature
It in control circuit, is directly connected to by temperature-detecting device and machine winding, therefore temperature-detecting device can measure machine winding
Actual temperature, by the way that the first normal open switch contact is arranged inside motor winding temperature display device, when the temperature of machine winding
When angle value reaches overtemperature trip value, then the first normal open switch contact executes corresponding action, so that motor current supply circuit is disconnected, motor
Dead electricity is shut down, and protects the safety of machine winding more fully hereinafter；It can not comprehensively be protected to effectively overcome the prior art
The operational safety of machine winding is protected, motor is easy the shortcoming being damaged due to high temperature.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, for those skilled in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of circuit structure diagram for motor winding temperature protection control circuit that the utility model embodiment provides；
Fig. 2 is a kind of circuit structure diagram of the current supply circuit for motor that the utility model embodiment provides.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
In conjunction with Fig. 1-2, the shown circuit structure of motor winding temperature protection control circuit of the utility model embodiment
Figure, for convenience of description, illustrate only with the relevant part of the utility model embodiment, details are as follows：
Motor winding temperature protection control circuit includes temperature-detecting device KR, temperature indicating device KTE, intermediate relay
Device KA and A.C. contactor KM.
The wherein signal input terminal 1T of the one end temperature-detecting device KR connection motor winding temperature display device KTE~
3T, the other end are used to detect the temperature value of machine winding for connecting machine winding, temperature-detecting device KR.
Specifically, temperature-detecting device KR is thermocouple or resistance detector；When temperature-detecting device KR gets electricity
When the temperature signal of machine winding, which is transmitted to by temperature indicating device KTE by signal input terminal 1T~3T.It can
Choosing, temperature-detecting device KR is set in machine winding or in motor embedded groove, since temperature-detecting device KR is directly connected to
Between the signal input terminal 1T~3T and machine winding of motor winding temperature display device KTE, filled by the temperature detection
The temperature value of machine winding can be accurately detected out in real time by setting KR, to which operating personnel can understand the practical temperature of machine winding in real time
Angle value.
Motor winding temperature display device KTE includes the first power port A1, second source port A2, the first high temperature port
31, the second high temperature port 32 and the first normal open switch contact K1.Wherein, when temperature-detecting device KR detects machine winding
When temperature value reaches overtemperature trip value, the first normal open switch contact K1 is closed, and motor dead electricity is made to shut down.It should be noted that institute
It refers to being more than or equal to the numerical value to state " reaching ".
First power port A1 and the first high temperature port 31 with the firewire L11 of power supply for connecting, second source port
The zero curve N connections of A2 and power supply, the first normal open switch contact K1 be connected to the first high temperature port 31 and the second high temperature port 32 it
Between, the coil KA-1 of intermediate relay is connected between the second high temperature port 32 and the zero curve N of power supply；The coil of A.C. contactor
The normally-closed contact KA-2 of KM-1 and intermediate relay is serially connected in the control loop of motor；The main normally opened contact of A.C. contactor
KM-3 is serially connected in the current supply circuit of motor, the start-stop for controlling motor.
By the utility model embodiment, when temperature-detecting device KR detects that the temperature of machine winding reaches overtemperature tripping
When value, the first normal open switch contact K1 be closed, intermediate relay coil KA-1 obtain it is electric, in being serially connected in the control loop of motor
Between the normally-closed contact KA-2 of relay disconnect, the coil KM-1 dead electricity of A.C. contactor is serially connected in the current supply circuit of motor
The main normally opened contact KM-3 of A.C. contactor is disconnected, and to make the current supply circuit of motor disconnect, motor dead electricity is shut down, and motor is prevented
It runs under the high temperature conditions, is effectively protected the operational safety of motor；To solve in the prior art due to hot operation
The problem of easily motor is damaged.
Specifically, motor winding temperature protection control circuit further includes the first indicating module SM.Motor winding temperature is aobvious
Showing device KTE further includes：Third high temperature port 33, the 4th high temperature port 34 and the second normal open switch contact K2；When temperature is examined
When survey device KR detects that the temperature of machine winding reaches overtemperature alarm value, then the second normal open switch contact K2 is closed.Third is high
Warm port 33 is connect with the firewire L11 of power supply, and the second normal open switch contact K2 is connected to third high temperature port 33 and the 4th high temperature
Between port 34, the first indicating module SM is connected between the 4th high temperature port 34 and the zero curve N of power supply.
In addition, above-mentioned overtemperature alarm value is not fixed with overtemperature trip value, it can be according to the model and system of motor
Make the actual conditions such as material to be set in advance.Optionally, overtemperature alarm value is 90 degrees Celsius, and overtemperature trip value is 100 degrees Celsius.
By the utility model embodiment, when temperature-detecting device KR detects that the temperature of machine winding reaches overtemperature alarm
When value, the second normal open switch contact K2 is closed, and the first indicating module SM is obtained electric and sent out sound and light alarm signal, reminds relevant operation
Personnel carry out cooling measure to machine winding in time, prevent motor longtime running under the conditions of excess temperature from being damaged to motor.
Specifically, the control loop further includes：Change-over switch SA, the first button switch SS, the second button switch SF, number
Word controls switch DDC and electrothermal relay KH.
Change-over switch SA's automatically enters end 3 and manual input 1 for being connect with the firewire L11 of power supply, change-over switch
The manual output end 1 of SA connects the first end of the first button switch SS, and the automatic output end 3 of change-over switch SA connects number
Control the first end of switch DDC, the second end of the first end of the second button switch SF and the first button switch SS connect with exchanging
The auxiliary normally opened contact KM-2 first ends of tentaculum connect, the second end of the second button switch SF, the second of digital control switch DDC
The auxiliary normally opened contact second end of the normally-closed contact KH-1 first ends and A.C. contactor of end and electrothermal relay connects, hot relay
The normally-closed contact KH-1 second ends of device and the first end of the normally-closed contact KA-2 of intermediate relay connect, the coil of A.C. contactor
The second end of the normally-closed contact KA-2 of KM-1 first ends and intermediate relay connects, the coil KM-1 second ends of A.C. contactor with
The zero curve N connections of power supply, the coil KH-2 of electrothermal relay are serially connected in the current supply circuit of motor.
Specifically, in the current supply circuit of motor, the fire of main the normally opened contact KM-3 first ends and power supply of A.C. contactor
The coil KH-2 first ends of line L11 connections, the main normally opened contact KM-3 second ends of A.C. contactor and electrothermal relay connect, heat after
The coil KH-2 second ends of electric appliance are for connecting motor.
Specifically, the manual input 1 of digital control switch DDC and automatically enter end 3 between selectively first conducting
Circuit or the second conducting circuit, the connection group between input terminal and output end by arbitrarily selecting digital control switch DDC
It closes, so that the control loop of motor is connected, facilitate the operating process of circuit control.
Specifically, the control loop further includes：Second indicating module HG；Second indicating module HG and A.C. contactor
Coil KM-1 is in parallel.Optionally, the second indicating module HG is signal lamp, should when in the conduction state in control loop
Signal lamp is bright, can detect the control loop working condition of motor in real time by the signal lamp.
Optionally, motor winding temperature protection control circuit further includes third indicating module HW；Third indicating module HW
First end for being connect with the firewire L11 of power supply, the second end of third indicating module HW and the zero curve N connections of power supply.
Optionally, third indicating module HW is that signal lamp illustrates if third indicating module HW is in the bright state of lamp
Motor winding temperature protection control circuit is in normal operating conditions；If third indicating module HW is in OFF state, say
Bright motor winding temperature protection control circuit be in malfunction, and simultaneously no current passes through in each force device, at this time operator
Member needs to disconnect input power, detects whether each force device in motor winding temperature protection control circuit breaks down,
To which the normal operation that the motor winding temperature protects control circuit can be detected by third indicating module HW.
Optionally, motor winding temperature protection control circuit further includes fuse FU；The first end of fuse FU and electricity
The firewire L11 connections in source, the second end of fuse FU and the first power port A1 of motor winding temperature display device KTE and
First high temperature port 31 connects.When motor winding temperature protects the input current overrate in control circuit, fuse
The heat that FU itself is generated makes melt fuse, to prevent the motor winding temperature protect control circuit in force device due to mistake
Electric current and destroyed, ensure that the motor winding temperature protection control circuit operational safety.
Specifically, the first indicating module SM is buzzer.
The utility model embodiment in order to better understand illustrates the machine winding below by a specific example
The operation principle of temperature protection control circuit：
If motor is in normal operation, the temperature of machine winding is in normal range (NR), such as 60 degrees Celsius；At this time
The actual temperature value of machine winding is detected by temperature-detecting device KR, and the temperature signal is transmitted to temperature indicating device
KTE, external operation personnel have obtained the actual temperature value of machine winding by temperature indicating device KTE；Due to machine winding
Temperature be less than overtemperature alarm value and overtemperature trip value, the first normal open switch contact K1 and the second normal open switch contact K2 are in disconnected
Open state；At this point, the coil KA-1 dead electricity of intermediate relay, the normally-closed contact KA-2 of intermediate relay is closed, the control of motor
Circuit is in the conduction state, and the coil KM-1 of A.C. contactor obtains electric, to be serially connected in the current supply circuit of motor A.C. contactor
Main normally opened contact KM-3 be closed, to motor obtain it is electric be in normal operation.
Since motor is in long-term work state, the actual temperature value of machine winding reaches temperature overtemperature alarm value, and such as 93
Degree Celsius, detect that the actual temperature value of machine winding, the second normal open switch contact K2 are closed by temperature-detecting device KR at this time
It closes, the first indicating module SM is obtained electric and sent out corresponding sound and light alarm signal, to remind operating personnel：The machine winding has arrived
Overtemperature alarm value is reached, motor is in excess temperature operating status, needs to take corresponding cooling measure to machine winding.
If the actual temperature value of machine winding increases always, the reality of machine winding is detected by temperature-detecting device KR
Temperature value has reached overtemperature trip value, such as 108 degrees Celsius, and first inside motor winding temperature display device KTE is normally opened to open
It closes contact K1 to be closed, the coil KA-1 of intermediate relay obtains electric, is serially connected in the normal of the intermediate relay in the control loop of motor
Closed contact KA-2 is disconnected, and since the control loop of motor disconnects, the coil KM-1 dead electricity of A.C. contactor is serially connected in the confession of motor
The main normally opened contact KM-3 of A.C. contactor in electrical circuit is disconnected, and the current supply circuit of motor disconnects, and motor is out of service.
The operational instances of control circuit are protected by above-mentioned motor winding temperature it is found that the temperature value when machine winding is more than
When normal range (NR), the first normal open switch contact K1 or the second normal open switch contact K2 actions, the first indicating module SM send out sound
The coil KA-1 of visual alarm or intermediate relay obtain it is electric after so that motor stopping is operated, prevent machine winding in excess temperature condition
Lower longtime running；It is easy the shortcoming being damaged by high temperature to effectively overcome motor in the prior art.
By the utility model embodiment, the temperature of machine winding is directly detected by temperature-detecting device KR, if motor
The temperature of winding reaches the overtemperature alarm value of motor, and the second normal open switch contact K2 is acted and the first indicating module SM is sent out in time
Go out sound and light alarm signal；If the temperature of machine winding reaches the overtemperature trip value of motor, the coil KA-1 of intermediate relay is obtained
Electricity, motor are shut down in time, to realize the function of machine winding overtemperature alarm, overtemperature tripping, comprehensively protect motor
Operational safety；It efficiently solves the problems, such as in the prior art since high temperature is easy to cause larger damage to machine winding.
It should be noted that herein, such as first and second etc relational terms are used merely to an entity
Distinguished with another entity, without necessarily requiring or implying between these entities there are any this actual relationship or
Person's sequence.And the terms "include", "comprise" or any other variant are intended to non-exclusive inclusion, so that packet
Include the product of a series of elements or the element that structure is intrinsic.In the absence of more restrictions, by sentence " packet
Include ... " or " including ... " limit element, it is not excluded that at process, method, article or end including the element
There is also other elements in end equipment.In addition, herein, " being more than ", " being less than ", " being more than " etc. are interpreted as not including this
Number；" more than ", " following ", " within " etc. be interpreted as including this number.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (8)
1. a kind of motor winding temperature protects control circuit, which is characterized in that including：Temperature-detecting device, temperature indicating device,
Intermediate relay and A.C. contactor；
Described temperature-detecting device one end connects the signal input terminal of the motor winding temperature display device, and the other end is used for
Connect machine winding, the temperature value for detecting the machine winding；The motor winding temperature display device includes the first electricity
Source port, second source port, the first high temperature port, the second high temperature port and the temperature value reach overtemperature trip value closure
The first normal open switch contact；First power port and first high temperature port are used to connect with the firewire of power supply,
The zero curve of the second source port and power supply connect, the first normal open switch contact portion first high temperature port with
Between second high temperature port, the coil of the intermediate relay be connected to second high temperature port and power supply zero curve it
Between；
The normally-closed contact of the coil of the A.C. contactor and the intermediate relay is serially connected in the control loop of motor；
The main normally opened contact of the A.C. contactor is serially connected in the current supply circuit of motor, the start-stop for controlling motor.
2. motor winding temperature according to claim 1 protects control circuit, which is characterized in that further include the first instruction mould
Block；
The motor winding temperature display device further includes：Third high temperature port, the 4th high temperature port and the temperature value reach
The second normal open switch contact being closed to overtemperature alarm value；
The firewire of the wherein described third high temperature port and power supply connects, and the second normal open switch contact portion is in third height
Between warm port and the 4th high temperature port, first indicating module is connected to the zero of the 4th high temperature port and power supply
Between line.
3. motor winding temperature according to claim 2 protects control circuit, which is characterized in that first indicating module
For buzzer.
4. motor winding temperature according to any one of claims 1 to 3 protects control circuit, which is characterized in that the control
Circuit processed further includes：Change-over switch, the first button switch, the second button switch, digital control switch and electrothermal relay；
The change-over switch automatically enters end and manual input for being connect with the firewire of power supply, the hand of the change-over switch
Dynamic output end connects the first end of first button switch, and the automatic output end connection of the change-over switch is described digital control
The second end of the first end of switch, the first end of second button switch and first button switch connects with described exchange
The auxiliary normally opened contact first end of tentaculum connects, the second end of second button switch, the second of the digital control switch
End and the normally-closed contact first end of the electrothermal relay and the auxiliary normally opened contact second end of the A.C. contactor are connect, institute
The normally-closed contact second end for stating electrothermal relay is connect with the first end of the normally-closed contact of the intermediate relay, the ac contactor
The coil first end of device is connect with the second end of the normally-closed contact of the intermediate relay, the coil second of the A.C. contactor
End is connect with the zero curve of power supply, and the coil tandem of the electrothermal relay is in the current supply circuit of motor.
5. motor winding temperature according to claim 4 protects control circuit, which is characterized in that the control loop is also wrapped
It includes：Second indicating module；
The coils from parallel connection of coils of second the instruction mould and the A.C. contactor.
6. motor winding temperature according to claim 1 protects control circuit, which is characterized in that further include：Third indicates
Module；
The first end of the third indicating module with the firewire of power supply for connecting, second end and the electricity of the third indicating module
The zero curve in source connects.
7. motor winding temperature according to claim 1 protects control circuit, which is characterized in that further include：Fuse；
The first end of the fuse and the firewire of power supply connect, and the second end of the fuse is aobvious with the motor winding temperature
First power port of showing device and the connection of the first high temperature port.
8. motor winding temperature according to claim 1 protects control circuit, which is characterized in that the temperature-detecting device
For thermocouple or resistance detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721785487.4U CN207638510U (en) | 2017-12-19 | 2017-12-19 | A kind of motor winding temperature protection control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721785487.4U CN207638510U (en) | 2017-12-19 | 2017-12-19 | A kind of motor winding temperature protection control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638510U true CN207638510U (en) | 2018-07-20 |
Family
ID=62853200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721785487.4U Active CN207638510U (en) | 2017-12-19 | 2017-12-19 | A kind of motor winding temperature protection control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207638510U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863854A (en) * | 2017-12-19 | 2018-03-30 | 泰豪科技股份有限公司 | A kind of motor winding temperature protects control circuit |
| CN109980606A (en) * | 2019-03-01 | 2019-07-05 | 常州猛犸电动科技有限公司 | A kind of thermal-shutdown circuit |
-
2017
- 2017-12-19 CN CN201721785487.4U patent/CN207638510U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863854A (en) * | 2017-12-19 | 2018-03-30 | 泰豪科技股份有限公司 | A kind of motor winding temperature protects control circuit |
| CN107863854B (en) * | 2017-12-19 | 2024-01-30 | 泰豪科技股份有限公司 | Motor winding temperature protection control circuit |
| CN109980606A (en) * | 2019-03-01 | 2019-07-05 | 常州猛犸电动科技有限公司 | A kind of thermal-shutdown circuit |
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