CN205544218U - Motor control and protection switch with cross heat -carrying memory protect function - Google Patents
Motor control and protection switch with cross heat -carrying memory protect function Download PDFInfo
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- CN205544218U CN205544218U CN201620106601.5U CN201620106601U CN205544218U CN 205544218 U CN205544218 U CN 205544218U CN 201620106601 U CN201620106601 U CN 201620106601U CN 205544218 U CN205544218 U CN 205544218U
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- current transformer
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- 230000006870 function Effects 0.000 title claims abstract description 13
- 230000006378 damage Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model discloses a motor control and protection switch with cross heat -carrying memory protect function, it includes motor and three -phase switch, its characteristics still included heat -carrying memory module, it is first, and secondly, the 3rd current transformer, it is first, and secondly, the 3rd current transformer's input is continuous with three phase current's three phase line respectively, it is first, and secondly, the 3rd current transformer's output is all continuous with three phase terminals of motor respectively through the switch, it is first, and secondly, the 3rd current transformer's control end links to each other with the corresponding input of crossing heat -carrying memory module respectively, the output of crossing heat -carrying memory module links to each other with three -phase switch with the help of the wire. Adopt the utility model discloses, the condition that can avoid the motor destruction of insulation that is leaded to by the temperature rising and burnt out takes place, has prolonged the life of motor. Can be used for preventing causing by the motor high temperature that the motor damages.
Description
Technical field
This utility model relates to a kind of electric switch.Specifically, be used to prevent by motor temperature too high and cause motor damages with Motor Control and the protection switch crossing heat-carrying memory defencive function.
Background technology
Both know about at electric field, current motor mostly uses single-chip microcomputer pass through three-phase current overload, three-phase current unbalance, overvoltage and the defencive function such as under-voltage, finally realize the through and off of switch.When motor running electric current exceedes setting value, switch just can play dropout effect.If in motor operation course electric current too high but when being not reaching to setting value, switch will not be threaded off, and motor will not power-off.Owing in motor operation course, electric current is too high, the temperature accumulation in motor can be made, make the temperature in motor raise.After the temperature in motor is increased to maximum permissible temperature, motor insulation damages can be caused to be burned out.As can be seen here; although using single-chip microcomputer to be realized the through and off switched by three-phase current overload, three-phase current unbalance, overvoltage and the defencive function such as under-voltage; but the situation cannot avoided being raised, by temperature, the motor insulation damages caused and be burned out occurs, thus shortens the service life of motor.
Utility model content
Problem to be solved in the utility model is to provide a kind of Motor Control with heat-carrying memory defencive function and protection switch.Use this Motor Control and protection switch, can avoid being raised, by temperature, the motor insulation damages that causes and situation about being burned out occurs, extend the service life of motor.
The problems referred to above to be solved in the utility model are realized by techniques below scheme:
The Motor Control with heat-carrying memory defencive function of the present utility model and protection switch, including motor and threephase switch, it is characterized in also including heat-carrying memory module, first current transformer, second current transformer and the 3rd current transformer, first current transformer, the input of the second current transformer and the 3rd current transformer is connected with three phase lines of three phase mains respectively, first current transformer, the outfan of the second current transformer and the 3rd current transformer is all connected with the three-phase terminal of motor respectively by switch, first current transformer, the end that controls of the second current transformer and the 3rd current transformer is connected with the respective input crossing heat-carrying memory module respectively, the outfan crossing heat-carrying memory module is connected with threephase switch by wire.
Described heat-carrying memory module of crossing includes single-chip microcomputer, first module module, second unit module and the 3rd unit module, the input of first module module, second unit module and the 3rd unit module control end with the first current transformer, the second current transformer and the 3rd current transformer respectively is connected, and the outfan of first module module, second unit module and the 3rd unit module respective input with described single-chip microcomputer respectively connects.
Described first module module, second unit module and the 3rd unit module all contain operational amplifier and diode, the input anode of operational amplifier is connected to the ground by the 3rd resistance, the first resistance, the second resistance and the first electric capacity is had between the input cathode of operational amplifier and ground, one end of first resistance and the first electric capacity is connected together as the input of corresponding units module and is connected to the ground, and the other end of the first resistance and the first electric capacity is connected with the input cathode of operational amplifier by the second resistance after connecting again.The negative pole of diode is connected with the outfan of operational amplifier, and the positive pole of diode is connected to the ground by the 5th resistance and the second electric capacity, and the junction point of the 5th resistance and the second electric capacity links together with the respective input of described single-chip microcomputer.It is connected to the 4th resistance between the positive pole of diode and the input cathode of the junction point of the 5th resistance and operational amplifier.
As can be seen from the above scheme, owing to this utility model included heat-carrying memory module, first current transformer, second current transformer and the 3rd current transformer, first current transformer, the input of the second current transformer and the 3rd current transformer is connected with three phase lines of three phase mains respectively, first current transformer, the outfan of the second current transformer and the 3rd current transformer is all connected with the three-phase terminal of motor respectively by switch, first current transformer, the end that controls of the second current transformer and the 3rd current transformer is connected with the respective input crossing heat-carrying memory module respectively, the outfan crossing heat-carrying memory module is connected with threephase switch by wire.In motor operation course, accumulation, rising along with temperature, judged the height of temperature by calculating by heat-carrying memory module excessively, make the switch of motor be not reaching to stream but temperature higher in the case of, also can thread off, thus avoid the situation being raised, by temperature, the motor insulation damages caused and be burned out and occur, substantially prolongs the service life of motor.
Accompanying drawing explanation
Fig. 1 is the Motor Control with heat-carrying memory defencive function of the present utility model and protection switch schematic diagram；
Fig. 2 is the mistake heat-carrying memory module electricity principle schematic in Fig. 1.
Detailed description of the invention
nullAs shown in Figure 1，The Motor Control with heat-carrying memory defencive function of the present utility model includes motor 3 with protection switch、Threephase switch 2、Cross heat-carrying memory module 4、First current transformer 1-1、Second current transformer 1-2 and the 3rd current transformer 1-3，First current transformer 1-1、The input of the second current transformer 1-2 and the 3rd current transformer 1-3 is connected with three phase lines of three phase mains respectively，First current transformer 1-1、The outfan of the second current transformer 1-2 and the 3rd current transformer 1-3 is all connected with the three-phase terminal of motor respectively by switch，First current transformer 1-1、The end that controls of the second current transformer 1-2 and the 3rd current transformer 1-3 is connected with the respective input crossing heat-carrying memory module 4 respectively，The outfan crossing heat-carrying memory module 4 is connected with threephase switch 2 by wire.
As shown in Figure 2, described heat-carrying memory module 4 of crossing includes single-chip microprocessor MCU, first module module, second unit module and the 3rd unit module, the input of first module module, second unit module and the 3rd unit module control end with the first current transformer 1-1, the second current transformer 1-1 and the 3rd current transformer 1-3 respectively is connected, and the outfan of first module module, second unit module and the 3rd unit module respective input with described single-chip microprocessor MCU respectively connects.Described first module module, second unit module and the 3rd unit module all contain operational amplifier U1 and diode D1, the input anode of operational amplifier U1 is connected to the ground by the 3rd resistance R3, the first resistance R1, the second resistance R2 and the first electric capacity C1 is had between the input cathode of operational amplifier U1 and ground, one end of first resistance R1 and the first electric capacity C1 is connected together as the input of corresponding units module and is connected to the ground, and the other end of the first resistance R1 and the first electric capacity C1 is connected by the input cathode of the second resistance R2 and operational amplifier U1 after connecting again；The negative pole of diode D1 is connected with the outfan of operational amplifier U1, and the positive pole of diode D1 is connected to the ground by the 5th resistance R5 and the second electric capacity C2, and the junction point of the 5th resistance R5 and the second electric capacity C2 links together with the respective input of described single-chip microprocessor MCU；It is connected to the 4th resistance R4 between the positive pole of diode D1 and the input cathode of the junction point of the 5th resistance R5 and operational amplifier U1.
During work, gave heat-carrying memory module 4, excessively the heat-carrying memory module 4 change by calculating current and time by the first current transformer 1-1, the second current transformer 1-2 and the 3rd current transformer 1-3 by the electric current in three phase lines and judged the height of temperature.If the temperature crossing heat-carrying memory module 4 judgement is too high, then output trip signal gives switch, makes motor 3 power-off.
Claims (3)
- null1. there is Motor Control and the protection switch of heat-carrying memory defencive function，Including motor (3) and threephase switch (2)，Characterized by further comprising heat-carrying memory module (4)、First current transformer (1-1)、Second current transformer (1-2) and the 3rd current transformer (1-3)，First current transformer (1-1)、Second current transformer (1-2) is connected with three phase lines of three phase mains respectively with the input of the 3rd current transformer (1-3)，First current transformer (1-1)、The outfan of the second current transformer (1-2) and the 3rd current transformer (1-3) all by threephase switch (2) respectively three-phase terminal with motor (3) be connected，First current transformer (1-1)、Second current transformer (1-2) is connected with the respective input crossing heat-carrying memory module (4) respectively with the control end of the 3rd current transformer (1-3)，The outfan crossing heat-carrying memory module (4) is connected with threephase switch (2) by wire.
- The Motor Control with heat-carrying memory defencive function the most according to claim 1 and protection switch, it is characterized in that described heat-carrying memory module (4) of crossing includes single-chip microcomputer (MCU), first module module (4-1), second unit module (4-2) and the 3rd unit module (4-3), first module module (4-1), the input of second unit module (4-2) and the 3rd unit module (4-3) respectively with the first current transformer (1-1), second current transformer (1-2) is connected with the control end of the 3rd current transformer (1-3), first module module (4-1), the outfan of second unit module (4-2) and the 3rd unit module (4-3) respective input with described single-chip microcomputer (MCU) respectively connects.
- The Motor Control with heat-carrying memory defencive function the most according to claim 2 and protection switch, it is characterized in that described first module module (4-1), second unit module (4-2) and the 3rd unit module (4-3) all contain operational amplifier U1 and diode D1, the input anode of operational amplifier U1 is connected to the ground by the 3rd resistance R3, the first resistance R1 is had between the input cathode of operational amplifier U1 and ground, second resistance R2 and the first electric capacity C1, one end of first resistance R1 and the first electric capacity C1 is connected together as the input of corresponding units module and is connected to the ground, the other end of the first resistance R1 and the first electric capacity C1 is connected by the input cathode of the second resistance R2 and operational amplifier U1 after connecting again；The negative pole of diode D1 is connected with the outfan of operational amplifier U1, and the positive pole of diode D1 is connected to the ground by the 5th resistance R5 and the second electric capacity C2, and the junction point of the 5th resistance R5 and the second electric capacity C2 links together with the respective input of described single-chip microprocessor MCU；It is connected to the 4th resistance R4 between the positive pole of diode D1 and the input cathode of the junction point of the 5th resistance R5 and operational amplifier U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106601.5U CN205544218U (en) | 2016-02-03 | 2016-02-03 | Motor control and protection switch with cross heat -carrying memory protect function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106601.5U CN205544218U (en) | 2016-02-03 | 2016-02-03 | Motor control and protection switch with cross heat -carrying memory protect function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544218U true CN205544218U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620106601.5U Expired - Fee Related CN205544218U (en) | 2016-02-03 | 2016-02-03 | Motor control and protection switch with cross heat -carrying memory protect function |
Country Status (1)
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| CN (1) | CN205544218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552842A (en) * | 2016-02-03 | 2016-05-04 | 无锡多普力科技有限公司 | Motor control and protection switch with overload thermal memory protection function |
-
2016
- 2016-02-03 CN CN201620106601.5U patent/CN205544218U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552842A (en) * | 2016-02-03 | 2016-05-04 | 无锡多普力科技有限公司 | Motor control and protection switch with overload thermal memory protection function |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 |