CN105552847A - Motor protection switch with phase-sequence protection function - Google Patents
Motor protection switch with phase-sequence protection function Download PDFInfo
- Publication number
- CN105552847A CN105552847A CN201610073967.1A CN201610073967A CN105552847A CN 105552847 A CN105552847 A CN 105552847A CN 201610073967 A CN201610073967 A CN 201610073967A CN 105552847 A CN105552847 A CN 105552847A
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- Prior art keywords
- phase
- operational amplifier
- resistance
- motor
- phase input
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
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- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a motor protection switch with a phase-sequence protection function, in particular to a motor protection switch with the phase-sequence protection function capable of preventing a motor from being damaged when a phase line of the motor is misconnected. The motor protection switch comprises the motor, a phase-sequence protection module and three voltage transformers, wherein a three-phase input end of the motor is connected with an A phase, a B phase and a C phase of a three-phase power supply through switches; the three voltage transformers are connected between the three-phase input end of the motor and the A phase, the B phase and the C phase of the three-phase power supply in series respectively; an A-phase input end, a B-phase input end and a C-phase input end are arranged on the phase-sequence protection module, and are connected with control ends of the three voltage transformers respectively via wires respectively; and an output end of the phase-sequence protection module is connected with the three-phase input end of the motor via the wire. By the motor protection switch, an accident caused by reverse rotation of the motor can be avoided.
Description
Technical field
The present invention relates to a kind of appliance switch.Specifically, be the motor protection switch with phase sequence function can avoiding motor damages when wrong appears in the phase line of motor.
Background technology
At present, only regular tap 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 reverse rotation.And when the load of motor be blower fan or water pump time, if reverse rotation occurs motor, not only can make blower fan or water pump cisco unity malfunction, and can serious accident be caused.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of motor protection switch with phase sequence function.Adopt this protection switch, motor reverse rotation can be avoided, guarantee that blower fan or water pump and so on load can normally work, avoid the accident caused by motor reverse rotation to occur.
The problems referred to above that the present invention will solve are realized by following technical scheme:
The motor protection switch of band phase sequence function of the present invention.It comprises motor, phase sequence module and three voltage transformers, and the three-phase input end of motor is connected respectively by the A phase of switch and three phase mains, B phase, C phase.Described three voltage transformers are connected between the A phase of three-phase input end with three phase mains of motor, B phase, C phase respectively.Phase sequence module there are A phase input, B phase input and C phase input; 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 output of phase sequence module is connected with electronic three-phase input end by wire.
Described phase sequence module comprises 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 way and is connected with the second resistance and the first resistance successively; the front of motor of the first resistance is connected with the A phase input of phase sequence module; be connected with the 3rd resistance and the first electric capacity between the backward end of the first operational amplifier and ground successively, the 3rd resistance is connected the end in the same way with the first operational amplifier with the tie point of the first electric capacity.The output 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 way 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 way and is connected with the 6th resistance and the 5th resistance successively; the front of motor of the 5th resistance is connected with the B phase input of phase sequence module; be connected with the 7th resistance and the 3rd electric capacity between the backward end of the second operational amplifier and ground successively, the 7th resistance is connected the end in the same way of the second operational amplifier with the tie point of the 3rd electric capacity.The output 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 way and is connected with the tenth resistance and the 9th resistance successively; the front of motor of the 9th resistance is connected with the C phase input of phase sequence module; be connected with the 11 resistance and the 6th electric capacity between the backward end of the 3rd operational amplifier and ground successively, the 11 resistance is connected the end in the same way of the 3rd operational amplifier with the tie point of the 6th electric capacity.The output of the 3rd operational amplifier is leaded up to the 12 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 way of four-operational amplifier is connected with its output, then linked together by the backward end of the 13 resistance and the first operational amplifier, the second operational amplifier, the 3rd operational amplifier.The backward end of four-operational amplifier is leaded up to the 14 resistance and is connected with working power, and the 15 resistance of separately leading up to connects with ground.
As can be seen from the above scheme, because the present invention contains phase sequence module and three voltage transformers, described three voltage transformers are connected between the A phase of three-phase input end with three phase mains of motor, B phase, C phase respectively.Phase sequence module there are A phase input, B phase input and C phase input; 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 output of phase sequence module is connected with the three-phase input end of motor by wire.During work, three phase mains by three voltage transformers by Signal transmissions to phase sequence module, after the single-chip microcomputer computing in phase sequence module, then give 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 to switch, makes 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, and switch is disconnected, and motor can not be energized work.Thus the situation avoiding motor reverse rotation occurs, and ensure that blower fan or water pump and so on load can normally work, avoid the accident caused by motor reverse rotation and occur.
Accompanying drawing explanation
Fig. 1 is the motor protection switch schematic diagram of band phase sequence function of the present invention;
Fig. 2 is phase sequence modular circuit principle schematic.
Embodiment
As shown in Figure 1; the motor protection switch of band phase sequence function of the present invention comprises motor 3, phase sequence module 4 and three voltage transformers 1, and the three-phase input end of motor 3 is connected respectively by A phase LA, the B phase LB of switch 2 and three phase mains, C phase LC.Described three voltage transformers 1 are connected between the A phase LA of three-phase input end with three phase mains, the B phase LB of motor 3, C phase LC respectively.Phase sequence module 4 there is A phase input UA, B phase input UB and C phase input UC; A phase input UA, B phase input UB is all connected with the control end of three voltage transformers 1 by wire respectively with C phase input UC, and the output of phase sequence module 4 is connected by the three-phase input end of wire with motor M.
Described phase sequence module 4 comprises 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 way and is connected with the second resistance R2 and the first resistance R1 successively, the front of motor of the first resistance R1 is connected with the A phase input UA of phase sequence module 4, be connected with the 3rd resistance (R3) and the first electric capacity (C1) between the backward end of the first operational amplifier U1 and ground successively, the 3rd resistance (R3) is connected the end in the same way with the first operational amplifier U1 with the tie point of the first electric capacity C1; The output 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 way 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 way and is connected with the 6th resistance R6 and the 5th resistance R5 successively; the front of motor of the 5th resistance R5 is connected with the B phase input UB of phase sequence module 4; be connected with the 7th resistance R7 and the 3rd electric capacity C3 between the backward end of the second operational amplifier U2 and ground successively, the 7th resistance R7 is connected the end in the same way of the second operational amplifier U2 with the tie point of the 3rd electric capacity C3.The output 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 way and is connected with the tenth resistance R10 and the 9th resistance R9 successively; the front of motor of the 9th resistance R9 is connected with the C phase input UC of phase sequence module 4; be connected with the 11 resistance R11 and the 6th electric capacity C6 between the backward end of the 3rd operational amplifier U3 and ground successively, the 11 resistance R11 is connected the end in the same way of the 3rd operational amplifier U3 with the tie point of the 6th electric capacity C6.The output of the 3rd operational amplifier U3 is leaded up to the 12 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 way of four-operational amplifier U4 is connected with its output, then linked together by the backward end of the 13 resistance R13 and the first operational amplifier U1, the second operational amplifier U2, the 3rd operational amplifier U3.The backward end of four-operational amplifier U4 is leaded up to the 14 resistance R14 and is connected with working power VCC, and the 15 resistance R15 of separately leading up to connects with ground.
Claims (2)
1. be with the motor protection switch of phase sequence function, comprise motor (M), the three-phase input end of motor (M) is connected respectively by the A phase (LA) of switch (2) and three phase mains, B phase (LB), C phase (LC); Characterized by further comprising phase sequence module (4) and three voltage transformers (1), described three voltage transformers (1) are connected between the A phase (LA) of three-phase input end with three phase mains of motor, B phase (LB), C phase (LC) respectively; Phase sequence module (4) there are A phase input (UA), B phase input (UB) and C phase input (UC); A phase input (UA), B phase input (UB) are all connected with the control end of three voltage transformers (1) by wire respectively with C phase input (UC), and the output of phase sequence module (4) is connected by the three-phase input end of wire with motor (M).
2. the motor protection switch of band phase sequence function according to claim 1; it is characterized in that described phase sequence module (4) comprises 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 way and is connected with the second resistance (R2) and the first resistance (R1) successively, the front of motor of the first resistance (R1) is connected with the A phase input (UA) of phase sequence module (4), be connected with the 3rd resistance (R3) and the first electric capacity (C1) between the backward end of the first operational amplifier (U1) and ground successively, the 3rd resistance (R3) is connected the end in the same way with the first operational amplifier (U1) with the tie point of the first electric capacity (C1); The output 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 way 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 way and is connected with the 6th resistance (R6) and the 5th resistance (R5) successively, the front of motor of the 5th resistance (R5) is connected with the B phase input (UB) of phase sequence module (4), be connected with the 7th resistance (R7) and the 3rd electric capacity (C3) between the backward end of the second operational amplifier (U2) and ground successively, the 7th resistance (R7) is connected the end in the same way of the second operational amplifier (U2) with the tie point of the 3rd electric capacity (C3); The output 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 way and is connected with the tenth resistance (R10) and the 9th resistance (R9) successively, the front of motor of the 9th resistance (R9) is connected with the C phase input (UC) of phase sequence module (4), be connected with the 11 resistance (R11) and the 6th electric capacity (C6) between the backward end of the 3rd operational amplifier (U3) and ground successively, the 11 resistance (R11) is connected the end in the same way of the 3rd operational amplifier (U3) with the tie point of the 6th electric capacity (C6); The output of the 3rd operational amplifier (U3) is leaded up to the 12 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 way of four-operational amplifier (U4) is connected with its output, then linked together by the backward end of the 13 resistance (R13) with the first operational amplifier (U1), the second operational amplifier (U2), the 3rd operational amplifier (U3); The backward end of four-operational amplifier (U4) is leaded up to the 14 resistance (R14) and is connected with working power (VCC), and the 15 resistance (R15) of separately leading up to connects with ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610073967.1A CN105552847A (en) | 2016-02-03 | 2016-02-03 | Motor protection switch with phase-sequence protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610073967.1A CN105552847A (en) | 2016-02-03 | 2016-02-03 | Motor protection switch with phase-sequence protection function |
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| Publication Number | Publication Date |
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| CN105552847A true CN105552847A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610073967.1A Pending CN105552847A (en) | 2016-02-03 | 2016-02-03 | Motor protection switch with phase-sequence protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156227A (en) * | 2021-03-31 | 2021-07-23 | 江西泰豪智能电力科技有限公司 | Phase sequence detection control circuit and shore power control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201135845Y (en) * | 2007-08-08 | 2008-10-22 | 安徽省电力科学研究院 | Sulfur hexafluoride recovering and recharging device |
| CN102185543A (en) * | 2010-07-15 | 2011-09-14 | 上海海洋大学 | Energy-saving soft-start device for high-voltage asynchronous motor |
| CN205544220U (en) * | 2016-02-03 | 2016-08-31 | 无锡多普力科技有限公司 | Take phase sequence protect function's motor protection switch |
-
2016
- 2016-02-03 CN CN201610073967.1A patent/CN105552847A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201135845Y (en) * | 2007-08-08 | 2008-10-22 | 安徽省电力科学研究院 | Sulfur hexafluoride recovering and recharging device |
| CN102185543A (en) * | 2010-07-15 | 2011-09-14 | 上海海洋大学 | Energy-saving soft-start device for high-voltage asynchronous motor |
| CN205544220U (en) * | 2016-02-03 | 2016-08-31 | 无锡多普力科技有限公司 | Take phase sequence protect function's motor protection switch |
Non-Patent Citations (1)
| Title |
|---|
| 李连昌: ""新型控制与保护开关设备及其远程监控系统设计与实现"", 《万方》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156227A (en) * | 2021-03-31 | 2021-07-23 | 江西泰豪智能电力科技有限公司 | Phase sequence detection control circuit and shore power control device |
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Application publication date: 20160504 |
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