CN206135749U - Triangle -shaped start control circuit - Google Patents
Triangle -shaped start control circuit Download PDFInfo
- Publication number
- CN206135749U CN206135749U CN201621062754.0U CN201621062754U CN206135749U CN 206135749 U CN206135749 U CN 206135749U CN 201621062754 U CN201621062754 U CN 201621062754U CN 206135749 U CN206135749 U CN 206135749U
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- China
- Prior art keywords
- motor
- triangle
- circuit
- voltage
- catalyst
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Abstract
The utility model discloses a triangle -shaped start control circuit, belong to beam -pumping unit circuit field, the circuit is according to time principle control start -up course, motor stator winding meets into triangle -shaped when starting, the voltage that every phase winding bore is the phase voltage (380V) of power, the torque that starts improves, start the later stage then become the star connection according to the time changing -over of adjusting in advance at it, the voltage that every phase winding bore is the line voltage (220V) of power, the actual power is reduced of motor, the motor gets into energy -conserving running state, this circuit is applicable to takes load or heavy load to start, the occasion that the operation back loading reduces.
Description
Technical field
This utility model is related to triangle and starts control circuit, belongs to oil pumper circuit field.
Background technology
In oil play, oil pumper threephase asynchronous typically using asynchronous motor full voltage starting control circuit and
Frequency Converter Control circuit.Asynchronous motor full voltage starting control circuit, control circuit are simple and reliable, the maintenance load of electrical equipment
Less, low cost, but motor power consumption is big, not energy-conservation；Frequency Converter Control circuit, control circuit are complicated, high cost, but electronic
Acc power is lost little, energy-conservation.
Oil pumper needs motor output torque big on startup at present, load reduction when operating steadily.
The content of the invention
This utility model needs motor output torque big for current oil pumper on startup, load drop when operating steadily
Low needs, devise triangle and start control circuit.
The technical scheme in the invention for solving the technical problem is：
The triangle starts control circuit, and its circuit is that temporally principle controls start-up course, on startup motor stator
Sub- winding is connected into triangle, phase voltage of the voltage born per phase winding for power supply（380V）, the torque for starting is improved, and at which
Start stage by the time changing-over adjusted in advance into star connection, line voltage of the voltage born per phase winding for power supply
（220V）, the actual power reduction of motor, motor enter energy-saving run state.
The control circuit operation principle：
Press start button SB2, catalyst KM1 coils obtain electric, motor M access power supply, meanwhile, time relay KT and
Catalyst KM2 coils obtain electric；
Catalyst KM2 coils obtain electric, and its normally opened main contacts closure, motor M stator winding are run under triangle connection.
The normally closed auxiliary contact of KM2 disconnects, it is ensured that catalyst KM3 must not electricity；
The normally opened contact timing closing of time relay KT；Normally-closed contact time delay cuts off KM2 coil powers after opening, its master
Contact disconnects and normally closed auxiliary contact closure；
Catalyst KM3 coils obtain electric, and its main contacts is closed, and motor M is started by triangle and switch to star to run.
The control circuit is stopped：
Stop by each catalyst release electric motor circuit breaking of SB1 auxiliary circuit power-off；
Circuit is provided with auxiliary contact interlocking between KM2 and KM3, prevents them while action causes short circuit；
After circuit proceeds to connection delta operation, the normally-closed contact disjunction of KM3, mute time relay KT, catalyst KM2 keep away
Exempt from KT, KM2 coil long-play and waste electric energy, and extend its life-span.
Compared with prior art, the beneficial effects of the utility model are：
It is to improve phase voltage that the three phase squirrel cage induction motor of this utility model design is started using triangle,（Triangle
Shape phase voltage is 380V）, improve the torque for starting.To prevent motor excessive overheated due to electric current, change Y after startup at once into and connect,
Reduce phase voltage（It is 220V that Y connects phase voltage）Electric current, enables motor long-play.Circuit is simpler, small investment.Which has the disadvantage
When triangle starts, electric current is 4-7 times of rated current, and excessive starting current can reduce motor life, cause transformator
Secondary voltage significantly declines, and reduces the detent torque of motor itself, or even motor is started at all, will also affect
The normal work of miscellaneous equipment in same power supply network.So the circuit is applied to bringing onto load or heavy load starting, back loading is run
The occasion of reduction.It is further noted that it is noted that the concordance of its direction of rotation when triangle couples.
After control circuit possesses the protective capability of under-voltage and decompression, there is advantage in terms of following three：
Low pressure operation of the motor in the case of heavy duty when preventing voltage degradation；Avoid motor at the same start and
Cause the degradation of voltage；When preventing supply voltage from recovering, the unexpected starting operation of motor causes equipment and personal injury.
Description of the drawings
Fig. 1 is this utility model integrated circuit structure chart.
Specific embodiment
As shown in Figure 1：Triangle starts control circuit, and its circuit is that temporally principle controls start-up course, on startup
Motor stator winding is connected into triangle, phase voltage of the voltage born per phase winding for power supply（380V）, improve turning for startup
Square, and after its starting the phase then by the time changing-over adjusted in advance into star connection, line of the voltage born per phase winding for power supply
Voltage（220V）, the actual power reduction of motor, motor enter energy-saving run state.
The control circuit operation principle：Start button SB2 is pressed, catalyst KM1 coils obtain electric, motor M accesses electricity
Source.Meanwhile, time relay KT and catalyst KM2 coils obtain electric；Catalyst KM2 coils obtain electric, its normally opened main contacts closure, electricity
Motivation M stator winding is run under triangle connection.The normally closed auxiliary contact of KM2 disconnects, it is ensured that catalyst KM3 must not electricity；
The normally opened contact timing closing of time relay KT;Normally-closed contact time delay cuts off KM2 coil powers after opening, and its main contacts disconnects
And normally closed auxiliary contact closure；Catalyst KM3 coils obtain electric, and its main contacts is closed, and motor M is started by triangle and switch to
Star is run.The control circuit is stopped：Stop by each catalyst release electric motor circuit breaking of SB1 auxiliary circuit power-off；Circuit
Auxiliary contact interlocking is provided between KM2 and KM3, them is prevented while action causes short circuit；After circuit proceeds to connection delta operation,
The normally-closed contact disjunction of KM3, mute time relay KT, catalyst KM2, it is to avoid KT, KM2 coil long-play and waste electricity
Can, and extend its life-span.
Route protection link：（1）Short-circuit protection：Main circuit is cut by the melt fusing of fuse FU when short-circuit.（2）Cross
Carry protection：Realized by thermorelay FR.As the thermal inertia of thermorelay is than larger, though flow through on thermal element several times it is specified
The electric current of electric current, thermorelay also will not actions immediately.Therefore in the case where the motor starting time is not oversize, thermorelay
The impact of motor start starting current is stood without action.Only the FR ability actions in the case where motor transships for a long time, disconnect control
Circuit, catalyst KM dead electricity cut off motor main circuit, and overload protection is realized in motor stalling.（3）Under-voltage and o-volt protection：
When motor is currently running, if supply voltage disappears for some reason, then when supply voltage recovers, motor is just
By self start, this may cause the damage of production equipment, or even cause personal injury.For electrical network, while there is many
Motor and other electrical equipment self starts can also cause the overcurrent not allowed and momentary network voltage to decline.In order to prevent
When voltage recovers, the protection of motor self start is o-volt protection or zero voltage protection.When motor runs well, power supply electricity
Pressure excessively reduces causing some electrical equipment to discharge, and causes control circuit irregular working, it is possible to create accident;Supply voltage mistake
Ground is divided to reduce also causing motor speed to decline even stalling.Therefore need when supply voltage is dropped to below certain permissible value
By dump, here it is low-voltage protection.Under-voltage and o-volt protection is realizing by the self-holding contact of catalyst KM.
During motor normally runs, line voltage is made to disappear or reduce for some reason, when voltage is less than the release of contactor coil
During voltage, catalyst release, self-holding contact disconnect, while main contacts disconnects, cut off motor power, motor stalling.If
Supply voltage recovers normal, due to self-locking releasing, motor will not self start, it is to avoid contingency generation.Only operate
After personnel press SB2 again, motor could be started.Compared with prior art, the beneficial effects of the utility model are：This practicality
It is to improve phase voltage that the three phase squirrel cage induction motor of new design is started using triangle,（Triangle phase voltage is
380V）, improve the torque for starting.To prevent motor excessive overheated due to electric current, change Y after startup at once into and connect, reduce phase voltage
（It is 220V that Y connects phase voltage）Electric current, enables motor long-play.Circuit is simpler, small investment.Which has the disadvantage that triangle starts
When electric current be 4-7 times of rated current, excessive starting current can reduce motor life, cause transformer secondary voltage big
Amplitude declines, and reduces the detent torque of motor itself, or even motor is started at all, will also affect same power supply network
The normal work of miscellaneous equipment in road.So the circuit is applied to bringing onto load or heavy load starting, the occasion that back loading is reduced is run.
It is further noted that it is noted that the concordance of its direction of rotation when triangle couples.
After control circuit possesses the protective capability of under-voltage and decompression, there is advantage in terms of following three：Prevent voltage tight
Low pressure operation of the motor in the case of heavy duty when declining again；Avoid motor at the same start and cause voltage it is serious under
Drop；When preventing supply voltage from recovering, the unexpected starting operation of motor causes equipment and personal injury.
The above, specific embodiment only of the present utility model, those of ordinary skill in the art are new in this practicality
In the range of type is disclosed, the change that can be readily occurred in should all be covered within the protection domain of utility model.
Claims (3)
1. triangle starts control circuit, it is characterized in that：Circuit is that temporally principle controls start-up course, on startup motor
Stator winding is connected into triangle, phase voltage 380V of the voltage born per phase winding for power supply, improves the torque for starting, and at which
Start stage by the time changing-over adjusted in advance into star connection, the voltage born per phase winding is line voltage 220V of power supply,
The actual power of motor is reduced, and motor enters energy-saving run state.
2. triangle according to claim 1 starts control circuit, it is characterized in that：The control circuit operation principle：Press
Lower start button SB2, catalyst KM1 coils obtain electric, and motor M accesses power supply.Meanwhile, time relay KT and catalyst KM2
Coil obtains electric；Catalyst KM2 coils obtain electric, and its normally opened main contacts closure, motor M stator winding are transported under triangle connection
OK, the normally closed auxiliary contact of KM2 disconnects, it is ensured that catalyst KM3 must not electricity；The normally opened contact time delay of time relay KT is closed
Close；Normally-closed contact time delay cuts off KM2 coil powers after opening, and its main contacts disconnects and normally closed auxiliary contact closure；Catalyst KM3
Coil obtains electric, and its main contacts is closed, and motor M is started by triangle and switches to star to run.
3. triangle according to claim 1 starts control circuit, it is characterized in that：The control circuit is stopped：It is auxiliary by SB1
The each catalyst release electric motor circuit breaking of down circuitry is helped to stop；Circuit is provided with auxiliary contact interlocking between KM2 and KM3, prevents
Their actions simultaneously cause short circuit；After circuit proceeds to connection delta operation, the normally-closed contact disjunction of KM3, mute time relay KT,
Catalyst KM2, avoids KT, KM2 coil long-play and wastes electric energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621062754.0U CN206135749U (en) | 2016-09-20 | 2016-09-20 | Triangle -shaped start control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621062754.0U CN206135749U (en) | 2016-09-20 | 2016-09-20 | Triangle -shaped start control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206135749U true CN206135749U (en) | 2017-04-26 |
Family
ID=58569399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621062754.0U Expired - Fee Related CN206135749U (en) | 2016-09-20 | 2016-09-20 | Triangle -shaped start control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206135749U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011572A (en) * | 2019-04-09 | 2019-07-12 | 上海奇电电气科技股份有限公司 | Angle star switching method and frequency converter |
| CN111525767A (en) * | 2019-07-29 | 2020-08-11 | 山东东普永磁电机有限公司 | Fan direct-drive asynchronous starting permanent magnet synchronous motor |
-
2016
- 2016-09-20 CN CN201621062754.0U patent/CN206135749U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011572A (en) * | 2019-04-09 | 2019-07-12 | 上海奇电电气科技股份有限公司 | Angle star switching method and frequency converter |
| CN111525767A (en) * | 2019-07-29 | 2020-08-11 | 山东东普永磁电机有限公司 | Fan direct-drive asynchronous starting permanent magnet synchronous motor |
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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: 20170426 Termination date: 20170920 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |