CN205544220U - Take phase sequence protect function's motor protection switch - Google Patents
Take phase sequence protect function's motor protection switch Download PDFInfo
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- CN205544220U CN205544220U CN201620106618.0U CN201620106618U CN205544220U CN 205544220 U CN205544220 U CN 205544220U CN 201620106618 U CN201620106618 U CN 201620106618U CN 205544220 U CN205544220 U CN 205544220U
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- 238000000819 phase cycle Methods 0.000 title claims abstract description 45
- 230000001681 protective effect Effects 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a take phase sequence protect function's motor protection switch. Specifically say, the motor protection switch who has a phase sequence protect function who staggers the time and to avoid that the motor damages appears connecing when the phase line of motor. It includes motor, phase sequence protective film piece and three voltage transformer, and the three -phase input of motor links to each other through A looks, B looks, the C of switch with three phase current respectively. Three voltage transformer establishes ties at the three -phase input of motor and three phase current's A looks, B looks, C between mutually respectively. Have A looks input, B looks input and C looks input on the phase sequence protective film piece, a looks input, B looks input and C looks input are all continuous with three voltage transformer's control end respectively with the help of the wire, and the output of phase sequence protective film piece links to each other with the help of wire and motor -driven three -phase input. Adopt the utility model discloses, can avoid the occurence of failure that arouses by motor reverse rotation.
Description
Technical field
This utility model relates to a kind of electric switch.Specifically, it is the motor protection switch with phase sequence function that can avoid motor damages when wrong occurs in the phase line of motor.
Background technology
At present, regular tap only it is connected with between the three-phase terminal of motor and three phase mains.Owing to being only connected with regular tap between the three-phase terminal of motor and three phase mains, during use, if wiring personnel are careless and inadvertent by three-phase power line wrong, motor will reversely rotate.And when the load of motor is blower fan or water pump, if motor reversely rotates, not only can make blower fan or water pump cisco unity malfunction, and major accident can be caused.
Utility model content
Problem to be solved in the utility model is to provide the motor protection switch of a kind of band phase sequence function.Use this protection switch, motor can be avoided to reversely rotate, it is ensured that blower fan or water pump etc load can normally work, it is to avoid reversely rotated the accident caused by motor and occur.
The problems referred to above to be solved in the utility model are realized by techniques below scheme:
The motor protection switch of band phase sequence function of the present utility model.It includes motor, phase sequence module and three voltage transformers, and the three-phase input end of motor is connected with the A phase of three phase mains, B phase, C phase by switch respectively.Described three voltage transformers are connected between the three-phase input end A phase with three phase mains of motor, B phase, C phase respectively.A phase input, B phase input and C phase input is had in phase sequence module; A phase input, B phase input are all connected with the control end of three voltage transformers by wire respectively with C phase input, and the outfan of phase sequence module is connected with electronic three-phase input end by wire.
Described phase sequence module includes the first operational amplifier, the second operational amplifier and the 3rd operational amplifier, four-operational amplifier and single-chip microcomputer, wherein:
First operational amplifier is held in the same direction and is sequentially connected with the second resistance and the first resistance; the front of motor of the first resistance is connected with the A phase input of phase sequence module; being sequentially connected with the 3rd resistance and the first electric capacity between the backward end of the first operational amplifier and ground, the junction point of the 3rd resistance and the first electric capacity connects the end in the same direction with the first operational amplifier.The outfan of the first operational amplifier is leaded up to the 4th resistance and is connected with single-chip microcomputer, and the second electric capacity of separately leading up to connects with ground.End in the same direction one tunnel of the first operational amplifier is connected with working power, and the 4th electric capacity of separately leading up to connects with ground.The backward end of the first operational amplifier is connected to the ground.
Second operational amplifier is held in the same direction and is sequentially connected with the 6th resistance and the 5th resistance; the front of motor of the 5th resistance is connected with the B phase input of phase sequence module; being sequentially connected with the 7th resistance and the 3rd electric capacity between the backward end of the second operational amplifier and ground, the junction point of the 7th resistance and the 3rd electric capacity connects the end in the same direction of the second operational amplifier.The outfan of the second operational amplifier is leaded up to the 8th resistance and is connected with single-chip microcomputer, and the 5th electric capacity of separately leading up to connects with ground.
3rd operational amplifier is held in the same direction and is sequentially connected with the tenth resistance and the 9th resistance; the front of motor of the 9th resistance is connected with the C phase input of phase sequence module; being sequentially connected with the 11st resistance and the 6th electric capacity between the backward end of the 3rd operational amplifier and ground, the junction point of the 11st resistance and the 6th electric capacity connects the end in the same direction of the 3rd operational amplifier.The outfan of the 3rd operational amplifier is leaded up to the 12nd resistance and is connected with single-chip microcomputer, and the 7th electric capacity of separately leading up to connects with ground.
After the end in the same direction of four-operational amplifier is connected with its outfan, then linked together by the 13rd resistance and the first operational amplifier, the second operational amplifier, the backward end of the 3rd operational amplifier.The backward end of four-operational amplifier is leaded up to the 14th resistance and is connected with working power, and the 15th resistance of separately leading up to connects with ground.
As can be seen from the above scheme, owing to this utility model contains phase sequence module and three voltage transformers, described three voltage transformers are connected between the three-phase input end A phase with three phase mains of motor, B phase, C phase respectively.A phase input, B phase input and C phase input is had in phase sequence module; A phase input, B phase input are all connected with the control end of three voltage transformers by wire respectively with C phase input, and the outfan of phase sequence module is connected with the three-phase input end of motor by wire.During work, three phase mains transmits a signal to phase sequence module by three voltage transformers, after the single-chip microcomputer computing in phase sequence module, then gives switch.If three phase mains is connected correctly with the phase sequence of the three-phase input end of motor, phase sequence module can export a pickup signal give switch, make switch adhesive, motor energising work.If the phase sequence connection error of the three-phase input end of three phase mains and motor, phase sequence module can export a trip signal to switch, make to switch off, and motor can not be energized work.Thus avoid the situation that motor reversely rotates and occur, it is ensured that blower fan or water pump etc load can normally work, it is to avoid is reversely rotated the accident caused by motor and occurs.
Accompanying drawing explanation
Fig. 1 is the motor protection switch schematic diagram of band phase sequence function of the present utility model；
Fig. 2 is phase sequence modular circuit principle schematic.
Detailed description of the invention
As shown in Figure 1; the motor protection switch of band phase sequence function of the present utility model includes motor 3, phase sequence module 4 and three voltage transformers 1, and the three-phase input end of motor 3 is connected with A phase LA of three phase mains, B phase LB, C phase LC by switch 2 respectively.Described three voltage transformers 1 are connected between three-phase input end A phase LA with three phase mains of motor 3, B phase LB, C phase LC respectively.A phase input UA, B phase input UB and C phase input UC is had in phase sequence module 4; A phase input UA, B phase input UB and C phase input UC is all connected with the control end of three voltage transformers 1 respectively by wire, and the outfan of phase sequence module 4 is connected by the three-phase input end of wire with motor M.
Described phase sequence module 4 includes the first operational amplifier U1, the second operational amplifier U2 and the 3rd operational amplifier U3, four-operational amplifier U4 and single-chip microprocessor MCU, wherein:
First operational amplifier U1 holds in the same direction and is sequentially connected with the second resistance R2 and the first resistance R1; the front of motor of the first resistance R1 is connected with the A phase input UA of phase sequence module 4; being sequentially connected with the 3rd resistance (R3) and the first electric capacity (C1) between the backward end of the first operational amplifier U1 and ground, the 3rd resistance (R3) is connected the end in the same direction with the first operational amplifier U1 with the junction point of the first electric capacity C1；The outfan of the first operational amplifier U1 is leaded up to the 4th resistance R4 and is connected with single-chip microprocessor MCU, and the second electric capacity C2 of separately leading up to connects with ground.End in the same direction one tunnel of the first operational amplifier U1 is connected with working power VCC, and the 4th electric capacity C4 of separately leading up to connects with ground.The backward end of the first operational amplifier U1 is connected to the ground.
Second operational amplifier U2 holds in the same direction and is sequentially connected with the 6th resistance R6 and the 5th resistance R5; the front of motor of the 5th resistance R5 is connected with the B phase input UB of phase sequence module 4; the junction point being sequentially connected with the 7th resistance R7 and the 3rd electric capacity C3, the 7th resistance R7 and the 3rd electric capacity C3 between the backward end of the second operational amplifier U2 and ground connects the end in the same direction of the second operational amplifier U2.The outfan of the second operational amplifier U2 is leaded up to the 8th resistance R8 and is connected with single-chip microprocessor MCU, and the 5th electric capacity C5 of separately leading up to connects with ground.
3rd operational amplifier U3 holds in the same direction and is sequentially connected with the tenth resistance R10 and the 9th resistance R9; the front of motor of the 9th resistance R9 is connected with the C phase input UC of phase sequence module 4; being sequentially connected with the 11st resistance R11 and the 6th electric capacity C6 between the backward end of the 3rd operational amplifier U3 and ground, the junction point of the 11st resistance R11 and the 6th electric capacity C6 connects the end in the same direction of the 3rd operational amplifier U3.The outfan of the 3rd operational amplifier U3 is leaded up to the 12nd resistance R12 and is connected with single-chip microprocessor MCU, and the 7th electric capacity C7 of separately leading up to connects with ground.
After the end in the same direction of four-operational amplifier U4 is connected with its outfan, then linked together by the 13rd resistance R13 and the first operational amplifier U1, the second operational amplifier U2, the backward end of the 3rd operational amplifier U3.The backward end of four-operational amplifier U4 is leaded up to the 14th resistance R14 and is connected with working power VCC, and the 15th resistance R15 of separately leading up to connects with ground.
Claims (2)
1. the motor protection switch of band phase sequence function, including motor (M), the three-phase input end of motor (M) is connected by the A phase (LA) of switch (2) and three phase mains, B phase (LB), C phase (LC) respectively；Characterized by further comprising phase sequence module (4) and three voltage transformers (1), described three voltage transformers (1) are connected between the three-phase input end A phase (LA) with three phase mains of motor, B phase (LB), C phase (LC) respectively；A phase input (UA), B phase input (UB) and C phase input (UC) is had in phase sequence module (4); A phase input (UA), B phase input (UB) and C phase input (UC) all by wire respectively control end with three voltage transformers (1) be connected, the outfan of phase sequence module (4) is connected by the three-phase input end of wire with motor (M).
The motor protection switch of band phase sequence function the most according to claim 1; it is characterized in that described phase sequence module (4) includes the first operational amplifier (U1), the second operational amplifier (U2) and the 3rd operational amplifier (U3), four-operational amplifier (U4) and single-chip microcomputer (MCU), wherein:
First operational amplifier (U1) is held in the same direction and is sequentially connected with the second resistance (R2) and the first resistance (R1); the front of motor of the first resistance (R1) is connected with A phase input (UA) of phase sequence module (4); being sequentially connected with the 3rd resistance (R3) and the first electric capacity (C1) between the backward end of the first operational amplifier (U1) and ground, the 3rd resistance (R3) is connected the end in the same direction with the first operational amplifier (U1) with the junction point of the first electric capacity (C1)；The outfan of the first operational amplifier (U1) is leaded up to the 4th resistance (R4) and is connected with single-chip microcomputer (MCU), and the second electric capacity (C2) of separately leading up to connects with ground；End in the same direction one tunnel of the first operational amplifier (U1) is connected with working power (VCC), and the 4th electric capacity (C4) of separately leading up to connects with ground；The backward end of the first operational amplifier (U1) is connected to the ground；
Second operational amplifier (U2) is held in the same direction and is sequentially connected with the 6th resistance (R6) and the 5th resistance (R5); the front of motor of the 5th resistance (R5) is connected with B phase input (UB) of phase sequence module (4); being sequentially connected with the 7th resistance (R7) and the 3rd electric capacity (C3) between the backward end of the second operational amplifier (U2) and ground, the 7th resistance (R7) is connected the end in the same direction of the second operational amplifier (U2) with the junction point of the 3rd electric capacity (C3)；The outfan of the second operational amplifier (U2) is leaded up to the 8th resistance (R8) and is connected with single-chip microcomputer (MCU), and the 5th electric capacity (C5) of separately leading up to connects with ground；
3rd operational amplifier (U3) is held in the same direction and is sequentially connected with the tenth resistance (R10) and the 9th resistance (R9); the front of motor of the 9th resistance (R9) is connected with C phase input (UC) of phase sequence module (4); being sequentially connected with the 11st resistance (R11) and the 6th electric capacity (C6) between the backward end of the 3rd operational amplifier (U3) and ground, the 11st resistance (R11) is connected the end in the same direction of the 3rd operational amplifier (U3) with the junction point of the 6th electric capacity (C6)；The outfan of the 3rd operational amplifier (U3) is leaded up to the 12nd resistance (R12) and is connected with single-chip microcomputer (MCU), and the 7th electric capacity (C7) of separately leading up to connects with ground；
After the end in the same direction of four-operational amplifier (U4) is connected with its outfan, then linked together with the first operational amplifier (U1), the second operational amplifier (U2), the backward end of the 3rd operational amplifier (U3) by the 13rd resistance (R13)；The backward end of four-operational amplifier (U4) is leaded up to the 14th resistance (R14) and is connected with working power (VCC), and the 15th resistance (R15) of separately leading up to connects with ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106618.0U CN205544220U (en) | 2016-02-03 | 2016-02-03 | Take phase sequence protect function's motor protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106618.0U CN205544220U (en) | 2016-02-03 | 2016-02-03 | Take phase sequence protect function's motor protection switch |
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| Publication Number | Publication Date |
|---|---|
| CN205544220U true CN205544220U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620106618.0U Expired - Fee Related CN205544220U (en) | 2016-02-03 | 2016-02-03 | Take phase sequence protect function's motor protection switch |
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| CN (1) | CN205544220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552847A (en) * | 2016-02-03 | 2016-05-04 | 无锡多普力科技有限公司 | Motor protection switch with phase-sequence protection function |
-
2016
- 2016-02-03 CN CN201620106618.0U patent/CN205544220U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552847A (en) * | 2016-02-03 | 2016-05-04 | 无锡多普力科技有限公司 | Motor protection switch with phase-sequence protection function |
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| Date | Code | Title | Description |
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| 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 |