CN209299175U - A kind of motor heating control apparatus - Google Patents
A kind of motor heating control apparatus Download PDFInfo
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- CN209299175U CN209299175U CN201822169381.2U CN201822169381U CN209299175U CN 209299175 U CN209299175 U CN 209299175U CN 201822169381 U CN201822169381 U CN 201822169381U CN 209299175 U CN209299175 U CN 209299175U
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- Prior art keywords
- resistance
- relay
- thermistor
- operational amplifier
- connect
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 23
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a kind of motor heating control apparatus, belong to motor heating control technology field, comprising: power supply, resistance R1, resistance R2, resistance R3, thermistor RT, operational amplifier and relay J；The resistance R1, resistance R2, resistance R3, thermistor RT are linked in sequence, and resistance R1 is connect with thermistor RT, form Wheatstone bridge；Resistance R2 is connect with the tie point of resistance R3 with positive pole；Resistance R1 is connect with the tie point of thermistor RT with power cathode；Resistance R3 is connect with the input terminal A of the tie point of thermistor RT and operational amplifier；Resistance R1 is connect with the input terminal B of the tie point of resistance R2 and operational amplifier；The output end of operational amplifier is connect with coil one end of relay J, and the coil other end of relay J is connect with power cathode；The contact series of relay J are on the control heating circuit of Oil pump electrical machinery；The device can be realized motor computer heating control by using Wheatstone bridge collocation operational amplifier circuit.
Description
Technical field
The utility model belongs to motor heating control technology field, and in particular to a kind of motor heating control apparatus.
Background technique
Motor winding temperature, computer heating control protective loop are detected using thermistor when Hydraulic System Oil pump motor heats
It is middle to be controlled using a certain critically weighted of thermistor, it is generally the case that be equipped with PLC thermal resistance collection module and acquire thermistor
Temperature, then by PLC calculation process take a certain temperature value for protect control, structure and complex disposal process and higher cost.
Utility model content
In view of this, the present invention provides a kind of motor heating control apparatus, arrange in pairs or groups by using Wheatstone bridge
Operational amplifier circuit to detect the resistance value of thermistor and export common switching value output signal 0 or 1, and then realizes motor heating
Control.
The utility model is achieved through the following technical solutions:
A kind of motor heating control apparatus, comprising: power supply, resistance R1, resistance R2, resistance R3, thermistor RT, operation are put
Big device and relay J；
The relay J is equipped with coil and contact, and when relay J exports on-off model 0, contact is in closed form
State, when relay J exports on-off model 1, contact is in an off state；
Integrated connection relationship is as follows: the resistance R1, resistance R2, resistance R3, thermistor RT are linked in sequence, and resistance R1
It is connect with thermistor RT, forms Wheatstone bridge；
Resistance R2 is connect with the tie point of resistance R3 with positive pole；The tie point and power supply of resistance R1 and thermistor RT
Cathode connection；
Resistance R3 is connect with the input terminal A of the tie point of thermistor RT and operational amplifier；Resistance R1's and resistance R2
The input terminal B connection of tie point and operational amplifier；The output end of operational amplifier is connect with coil one end of relay J, after
The coil other end of electric appliance J is connect with power cathode, and operational amplifier is used for the voltage according to its input terminal A and input terminal B, is come
It controls relay J and exports on-off model 0 or 1；The contact series of relay J are on the control heating circuit of Oil pump electrical machinery.
Further, the resistance value of the thermistor RT increases with temperature and is increased.
Further, the operational amplifier uses 5532 chips.
Further, the power supply uses 24V DC power supply.
The utility model has the advantages that the utility model by using Wheatstone bridge arrange in pairs or groups operational amplifier circuit, to detect the resistance of thermistor
It is worth and exports common switching value output signal 0 or 1, and then the relay contact on the control heating circuit of control oil pump motor
Closing or opening, when environment temperature is higher, thermistor resistance value becomes larger, and relay disconnects automatically, and control oil pump motor no longer adds
Heat；When environment temperature reduces, thermistor resistance value becomes smaller, and relay is closed automatically, and control oil pump motor is begun to warm up, and is realized
The control that motor is heated automatically；Structure and principle are simple, and with small in size, at low cost, performance is stable, the spy convenient for integrating
Point.
Detailed description of the invention
Fig. 1 is the structure composition figure of the utility model；
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
A kind of motor heating control apparatus is present embodiments provided, referring to attached drawing 1, comprising: power supply, resistance R1, resistance R2,
Resistance R3, thermistor RT, operational amplifier and relay J；
The power supply uses 24V DC power supply；
The operational amplifier use 5532 chips, both can amplified signal, be alternatively arranged as comparator；
The resistance value of the thermistor RT increases with temperature and is increased；
The relay J is equipped with coil and contact, and when relay J exports on-off model 0, contact is in closed form
State, when relay J exports on-off model 1, contact is in an off state；
Integrated connection relationship is as follows: the resistance R1, resistance R2, resistance R3, thermistor RT are linked in sequence, and resistance R1
It is connect with thermistor RT, forms Wheatstone bridge；
Resistance R2 is connect with the tie point of resistance R3 with positive pole；The tie point and power supply of resistance R1 and thermistor RT
Cathode connection；
Resistance R3 is connect with the input terminal A of the tie point of thermistor RT and operational amplifier；Resistance R1's and resistance R2
The input terminal B connection of tie point and operational amplifier；The output end of operational amplifier is connect with coil one end of relay J, after
The coil other end of electric appliance J is connect with power cathode；Operational amplifier is used for the voltage according to its input terminal A and input terminal B, comes
It controls relay J and exports on-off model 0 or 1；The contact series of relay J are on the control heating circuit of Oil pump electrical machinery.
Working principle: when Oil pump electrical machinery heating, the resistance value of thermistor RT increases with temperature and persistently increases, and operation is put
The voltage of the input terminal A of big device increases with the resistance value of thermistor RT and is increased, and the voltage of the input terminal B of operational amplifier is always
It remains unchanged；
When the resistance value of thermistor RT increases, but is consistently less than setting value, the voltage of the input terminal A of operational amplifier is small
On-off model 0, relay are exported in the output end control relay J of the voltage of the input terminal B of operational amplifier, operational amplifier
The contact closure of device J, Oil pump electrical machinery continue to heat；
When the resistance value of thermistor RT is increased above or is equal to setting value, the voltage of the input terminal A of operational amplifier
More than or equal to the voltage of the input terminal B of operational amplifier, the output end control relay J output switching value letter of operational amplifier
The contact of number 1, relay J disconnect, and Oil pump electrical machinery stops heating；
To achieve the purpose that automatically control whether Oil pump electrical machinery heats according to temperature change.
In conclusion the above is only the preferred embodiments of the present utility model only, it is not intended to limit the utility model
Protection scope.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap
Containing being within the protection scope of the utility model.
Claims (4)
1. a kind of motor heating control apparatus characterized by comprising power supply, resistance R1, resistance R2, resistance R3, thermistor
RT, operational amplifier and relay J；
The relay J is equipped with coil and contact, and when relay J exports on-off model 0, contact is in closed state, when
When relay J exports on-off model 1, contact is in an off state；
Integrated connection relationship is as follows: the resistance R1, resistance R2, resistance R3, thermistor RT are linked in sequence, and resistance R1 and heat
Quick resistance RT connection forms Wheatstone bridge；
Resistance R2 is connect with the tie point of resistance R3 with positive pole；The tie point and power cathode of resistance R1 and thermistor RT
Connection；
Resistance R3 is connect with the input terminal A of the tie point of thermistor RT and operational amplifier；The connection of resistance R1 and resistance R2
Point is connect with the input terminal B of operational amplifier；The output end of operational amplifier is connect with coil one end of relay J, relay J
The coil other end connect with power cathode, operational amplifier is used for according to the voltage of its input terminal A and input terminal B, to control
Relay J exports on-off model 0 or 1；The contact series of relay J are on the control heating circuit of Oil pump electrical machinery.
2. a kind of motor heating control apparatus as described in claim 1, which is characterized in that the resistance value of the thermistor RT with
Temperature increases and increases.
3. a kind of motor heating control apparatus as described in claim 1, which is characterized in that the operational amplifier uses 5532
Chip.
4. a kind of motor heating control apparatus as described in claim 1, which is characterized in that the power supply uses 24V direct current
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822169381.2U CN209299175U (en) | 2018-12-21 | 2018-12-21 | A kind of motor heating control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822169381.2U CN209299175U (en) | 2018-12-21 | 2018-12-21 | A kind of motor heating control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209299175U true CN209299175U (en) | 2019-08-23 |
Family
ID=67656071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822169381.2U Expired - Fee Related CN209299175U (en) | 2018-12-21 | 2018-12-21 | A kind of motor heating control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209299175U (en) |
-
2018
- 2018-12-21 CN CN201822169381.2U patent/CN209299175U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |