CN212210764U - Motor temperature measuring and protecting device - Google Patents
Motor temperature measuring and protecting device Download PDFInfo
- Publication number
- CN212210764U CN212210764U CN202021110704.1U CN202021110704U CN212210764U CN 212210764 U CN212210764 U CN 212210764U CN 202021110704 U CN202021110704 U CN 202021110704U CN 212210764 U CN212210764 U CN 212210764U
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- temperature
- controller
- precision resistor
- temperature protection
- motor
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Abstract
The utility model belongs to the technical field of electric appliances, in particular to a motor temperature measuring and protecting device, which comprises a plurality of temperature protection switches arranged in a motor winding, wherein all the temperature protection switches are connected in parallel with a precision resistor after being connected in series, the precision resistor is arranged in a motor, and the temperature protection switch and the precision resistor after being connected in parallel are connected in series with a resistance type temperature sensor; the intelligent temperature controller also comprises a controller, wherein the IN end of the controller is connected with the resistance type temperature sensor, and the GND end of the controller is connected with the temperature protection switch and the precision resistor which are connected IN parallel; the temperature protection switch is of a normally closed type, and the resistance value of the precision resistor is larger than the resistance value difference of the resistor type temperature sensor in the measurement temperature variation range. The temperature protection switch can be used for measuring and protecting the temperature by using one controller port, and the temperature can still be measured normally after the temperature protection switch acts.
Description
Technical Field
The utility model belongs to the technical field of electrical apparatus, concretely relates to motor temperature measurement and protection device.
Background
The motor is damaged due to the fact that the motor runs at an overhigh temperature for a long time, a temperature protection switch and a resistance type temperature sensor are installed in a motor winding, and measurement and protection are conducted through the following two methods. The first method needs to use two controller ports for measurement and protection, and the second method cannot measure the temperature after the temperature protection switch is operated.
Disclosure of Invention
In order to overcome the shortcomings of the prior art, the utility model provides a motor temperature measurement and protection device, can use a controller port to carry out the measurement and the protection of temperature and still can normally carry out the measurement of temperature after the temperature protection switch action.
The utility model discloses a realize through following technical scheme: a temperature measuring and protecting device for a motor comprises temperature protection switches which are arranged in a motor winding at a plurality of positions, wherein all the temperature protection switches are connected in series and then connected in parallel with a precision resistor, the precision resistor is arranged in the motor, and the temperature protection switches and the precision resistor which are connected in parallel are then connected in series with a resistor type temperature sensor; the intelligent temperature controller also comprises a controller, wherein the IN end of the controller is connected with the resistance type temperature sensor, and the GND end of the controller is connected with the temperature protection switch and the precision resistor which are connected IN parallel; the temperature protection switch is of a normally closed type, and the resistance value of the precision resistor is larger than the resistance value difference of the resistor type temperature sensor in the measurement temperature variation range. The resistance type temperature sensor is PT 100.
The utility model has the advantages that: this application uses a controller port to carry out the measurement and the protection of motor temperature, still can normally carry out the measurement of temperature after the temperature protection switch action, for prior art, has reduced the use quantity of controller promptly, also can continue to carry out the measurement of temperature after the temperature protection switch action simultaneously.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1, a temperature protection switch, 2, a precision resistor, 3, a resistor type temperature sensor, 4 and a controller.
Detailed Description
The invention will be further explained below with reference to the drawings and examples.
As shown in fig. 1, a motor temperature measurement and protection device comprises temperature protection switches 1 arranged in a motor winding at multiple positions, wherein all the temperature protection switches 1 are connected in series and then connected in parallel with a precision resistor 2, the precision resistor 2 is arranged in a motor, and the temperature protection switches 1 and the precision resistor 2 which are connected in parallel are then connected in series with a resistance type temperature sensor 3; the temperature sensor is characterized by further comprising a controller 4 for measuring resistance and calculating temperature, wherein the IN end of the controller 4 is connected with a resistance type temperature sensor 3, the resistance type temperature sensor 3 is PT100, and the GND end of the controller 4 is connected with the temperature protection switch 1 and the precision resistor 2 which are connected IN parallel; the temperature protection switch 1 is of a normally closed type and is turned off when the temperature exceeds a threshold value. The resistance value of the precision resistor 2 is larger than the resistance value difference of the resistor type temperature sensor 3 in the measuring temperature variation range, and the corresponding relation between the resistance value of the selected resistor type temperature sensor 3 and the temperature is monotonous. The device can measure the temperature of the motor winding, and the temperature of the motor winding can still be calculated when the temperature protection switch 1 acts.
When the temperature protection switch 1 does not act, the acquired value of the controller 4 is the resistance value of the resistance type temperature sensor 3, and the controller 4 calculates the temperature of the motor according to the corresponding relation between the resistance type temperature sensor 3 and the temperature; when the temperature protection switch 1 acts, the collected value of the controller 4 is the sum of the resistance values of the resistance type temperature sensor 3 and the precision resistor 2, the resistance value exceeds the normal range of the resistance type temperature sensor 3, and the controller 4 calculates the temperature of the motor by subtracting the resistance value of the precision resistor 2 from the actually measured resistance value.
Claims (2)
1. The utility model provides a motor temperature measurement and protection device which characterized in that: the temperature protection circuit comprises temperature protection switches (1) which are arranged in a motor winding in multiple positions, wherein all the temperature protection switches (1) are connected in series and then connected in parallel with a precision resistor (2), the precision resistor (2) is arranged in a motor, and the temperature protection switches (1) and the precision resistor (2) which are connected in parallel are then connected in series with a resistance type temperature sensor (3); the temperature protection circuit also comprises a controller (4), wherein the IN end of the controller (4) is connected with the resistance type temperature sensor (3), and the GND end of the controller (4) is connected with the temperature protection switch (1) and the precision resistor (2) which are connected IN parallel; the temperature protection switch (1) is of a normally closed type, and the resistance value of the precision resistor (2) is larger than the resistance value difference of the resistor type temperature sensor (3) in the measuring temperature variation range.
2. A motor temperature measuring and protecting apparatus according to claim 1, wherein: the resistance type temperature sensor (3) is PT 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021110704.1U CN212210764U (en) | 2020-06-16 | 2020-06-16 | Motor temperature measuring and protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021110704.1U CN212210764U (en) | 2020-06-16 | 2020-06-16 | Motor temperature measuring and protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212210764U true CN212210764U (en) | 2020-12-22 |
Family
ID=73808307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021110704.1U Active CN212210764U (en) | 2020-06-16 | 2020-06-16 | Motor temperature measuring and protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212210764U (en) |
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2020
- 2020-06-16 CN CN202021110704.1U patent/CN212210764U/en active Active
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