CN107800349A - A kind of double-speed motor control circuit - Google Patents
A kind of double-speed motor control circuit Download PDFInfo
- Publication number
- CN107800349A CN107800349A CN201711065666.5A CN201711065666A CN107800349A CN 107800349 A CN107800349 A CN 107800349A CN 201711065666 A CN201711065666 A CN 201711065666A CN 107800349 A CN107800349 A CN 107800349A
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- Prior art keywords
- contactor
- double
- speed
- motor
- speed motor
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- 238000000819 phase cycle Methods 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 4
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
Abstract
The present invention relates to a kind of double-speed motor control circuit, including 8 contactors, breaker, auto-transformer, double-speed motor, three-phase alternating-current supply passes through breaker, 5th contactor, 7th contactor, first contactor connects the low speed terminal of double-speed motor, 6th contactor negative-phase sequence is connected in parallel on the both ends of the 5th contactor, auto-transformer input and output end are connected in parallel on the 7th contactor both ends by the 8th contactor and the 4th contactor respectively, it is in parallel between first contactor upper end and the high-speed terminal of double-speed motor to be connected to second contactor connection, 3rd contactor shorted on one end, the low speed terminal of the other end and motor connects.The present invention realizes the effectively control, and have both overload protection, short-circuit protection, electrical interlocks defencive function of heavy-duty motor multi-state synthesis, safe and reliable to operation, significantly reduces cost.
Description
Technical field
The invention belongs to technical field of electric control, more particularly to a kind of high-power AC motor rotating reduced voltage starting becomes
Pole speed governing Comprehensive Control.
Background technology
Alternating current generator generally uses variable-frequency stepless speed-regulating, and pole-changing control is used to step speed regulation application scenario, can be significantly
Reduce cost.There are simple motor positive inversion control circuit, simple double-speed motor control circuit, simple drop using more
Pressure start control circuit, these control circuit functions are single, it is impossible to realize Comprehensive Control.
The content of the invention
The purpose of the present invention is a kind of double-speed motor control circuit, it is possible to achieve the effectively control of heavy-duty motor multi-state synthesis
System, and have both overload protection, short-circuit protection, electrical interlocks defencive function.
The present invention concrete technical scheme be, described double-speed motor control circuit include 8 contactors, breaker, from
Coupling transformer, double-speed motor, three-phase alternating-current supply are connected by breaker, the 5th contactor, the 7th contactor, first contactor
The low speed terminal of double-speed motor, the 6th contactor negative-phase sequence are connected in parallel on the both ends of the 5th contactor, auto-transformer input and
Output end is connected in parallel on the 7th contactor both ends, first contactor upper end and double speed by the 8th contactor and the 4th contactor respectively
Parallel connection is connected to second contactor connection between the high-speed terminal of motor, the 3rd contactor shorted on one end, the other end and motor it is low
Fast terminal connection.
Overload, short-circuit protection are provided with described breaker, described individual contactor connects with control turn-knob respectively
Connect, protected on described control turn-knob using electrical interlocks.
Present invention employs high power AC double-speed motor reduced voltage starting rotating pole-changing control control mode, realizes big
Power motor rotates forward the operation of low speed reduced voltage starting, the operation of rotating forward high speed reduced voltage starting, the operation of reversion low speed reduced voltage starting, reversion height
Four kinds of operating mode synthesis effectively controls such as prompt drop pressure starting operation.Meanwhile the present invention is protected using electrical interlocks, when a kind of mould of selection
When formula is run, the operation of other patterns is invalid；Motor at a high speed, low speed, rotate forward, reversion and auto-transformer input, withdraw from,
There is electrical interlocks protection.Above-mentioned safety measure may insure that equipment safety is started and run.In terms of concrete operations, rotate forward and anti-
The switching turned, it should operated since when motor is static；Same direction of rotation, high speed, the switching of low speed can operate in motor
Middle progress.The present invention compared with variable-frequency stepless speed-regulating control mode, considerably reduce electrically with control system cost, only with 315kW
Exemplified by motor, actual cost only has 10% of variable-frequency stepless speed-regulating or so.Therefore, the present invention realizes heavy-duty motor multi-state
Comprehensive effectively control, and have both overload protection, short-circuit protection, electrical interlocks defencive function, it is safe and reliable to operation, significantly reduce
Cost.
Brief description of the drawings
Fig. 1 is the connection diagram of the present invention.
Embodiment
As illustrated, double-speed motor control circuit includes 8 contactors, breaker 9, auto-transformer 11, double-speed motor
10, three-phase alternating-current supply connects double-speed motor 10 by breaker 9, the 5th contactor 5, the 7th contactor 7, first contactor 1
Low speed terminal, the negative-phase sequence of the 6th contactor 6 is connected in parallel on the both ends of the 5th contactor 5, the input of auto-transformer 11 and output
End is connected in parallel on the both ends of the 7th contactor 7, the upper end of first contactor 1 and double speed by the 8th contactor 8 and the 4th contactor 4 respectively
Parallel connection is connected to second contactor 2 and connected between the high-speed terminal of motor, the shorted on one end of the 3rd contactor 3, the other end and motor 10
Low speed terminal connection.
Overload, short-circuit protection are provided with described breaker 9, described 8 contactors are respectively with controlling turn-knob
Connect, protected on described control turn-knob using electrical interlocks.
Specific work process is as follows：
(1) low speed is rotated forward
During starting, it is off-state to confirm all contactors, then makes first contactor 1 electric by rotating forward low speed knob, this
When motor be connected into 12 poles, make the 5th contactor 5 it is electric, now phase sequence while makes the 8th contactor the 8, the 4th to rotate forward phase sequence
Contactor 4 must be electric, and auto-transformer 11 is series connection access state；Motor is series connection Auto-start relief transformer mode；7th
Contactor 7 is delayed electric, and the auxiliary normally-closed contact of contactor 7 powers off the 8th contactor 8, the 4th contactor 4, so as to withdraw from certainly
Coupling transformer 11, motor are in normal and rotate forward low-speed run state.When needing to shut down, turn knob, all contactors are made to locate
In dead electricity off-state, so as to ensure reliable shutdown.
(2) rotate forward at a high speed
During starting, it is off-state to confirm all contactors, then by rotating forward high speed knob, connects second contactor the 2, the 3rd
Tentaculum 3 must be electric, and now motor is connected into sextupole, obtains the 5th contactor 5 electric, now phase sequence makes the 8th contactor to rotate forward phase sequence
8th, the 4th contactor 4 obtains electric, and auto-transformer 11 is series connection access state；Motor is series connection Auto-start relief transformer side
Formula；7th contactor 7 is delayed electric, and the auxiliary normally-closed contact of the 7th contactor 7 makes the 8th contactor 8, the 4th contactor 4 disconnected
Electricity, so as to withdraw from auto-transformer, motor is in normal and rotates forward high-speed cruising state.When needing to shut down, turn knob, make to own
Contactor is in dead electricity off-state, reliable shutdown.
(3) low speed is inverted
During starting, it is off-state to confirm all contactors, then by inverting low speed knob, make first contactor 1 it is electric, this
When motor be connected into 12 poles, while make the 6th contactor 6 it is electric, now phase sequence for reversion phase sequence, make the 8th contactor the 8, the 4th
Contactor 4 must be electric, and auto-transformer 11 is series connection access state；Motor is series connection Auto-start relief transformer mode；7th
Contactor 7 is delayed electric, and the auxiliary normally-closed contact of the 7th contactor 7 powers off the 8th contactor 8, the 9th contactor 9, so as to remove
Go out auto-transformer, motor is in normal reversion low-speed run state.When needing to shut down, turn knob, make all contactors equal
In dead electricity off-state, reliable shutdown.
(4) reversion high speed
During starting, it is off-state to confirm all contactors, then by inverting high speed knob, connects second contactor the 2, the 3rd
Tentaculum 3 it is electric, now motor is connected into sextupole, at the same make the 6th contactor 6 it is electric, now phase sequence is reversion phase sequence, while makes the
Eight contactors 8, the 4th contactor 4 must be electric, and auto-transformer 11 is series connection access state；Motor is series connection auto-transformer decompression
Start mode；7th contactor 7 is delayed electric, and the auxiliary normally-closed contact of the 7th contactor 7 contacts the 8th contactor the 8, the 4th
Device 4 powers off, and so as to withdraw from auto-transformer, motor is in normal reversion high-speed cruising state.When needing to shut down, turn knob,
All contactors are made to be in dead electricity off-state, reliable shutdown.
Claims (3)
1. a kind of double-speed motor control circuit, it is characterised in that described circuit includes 8 contactors, breaker (9), self coupling
Transformer (11), double-speed motor (10), three-phase alternating-current supply pass through breaker (9), the 5th contactor (5), the 7th contactor
(7), the low speed terminal of first contactor (1) connection double-speed motor (10), the 6th contactor (6) negative-phase sequence are connected in parallel on the 5th contact
The both ends of device (5), auto-transformer (11) input and output end pass through the 8th contactor (8) and the 4th contactor (4) respectively
The 7th contactor (7) both ends are connected in parallel on, it is in parallel between first contactor (1) upper end and the high-speed terminal of double-speed motor to be connected to second
Contactor (2) connects, the low speed terminal connection of the 3rd contactor (3) shorted on one end, the other end and motor (10).
2. a kind of double-speed motor control circuit as claimed in claim 1, it is characterised in that set on described breaker (9)
There are overload, short-circuit protection.
A kind of 3. double-speed motor control circuit as claimed in claim 1, it is characterised in that 8 described contactors respectively with
Turn-knob connection is controlled, is protected on described control turn-knob using electrical interlocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711065666.5A CN107800349A (en) | 2017-11-02 | 2017-11-02 | A kind of double-speed motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711065666.5A CN107800349A (en) | 2017-11-02 | 2017-11-02 | A kind of double-speed motor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107800349A true CN107800349A (en) | 2018-03-13 |
Family
ID=61548742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711065666.5A Pending CN107800349A (en) | 2017-11-02 | 2017-11-02 | A kind of double-speed motor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107800349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409462A (en) * | 2020-04-24 | 2020-07-14 | 无锡小刀电动科技股份有限公司 | Double-power control system for electric vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204099253U (en) * | 2014-08-18 | 2015-01-14 | 深圳市建筑设计研究总院有限公司 | A kind of fire-fighting is held concurrently the control system of dual-purpose Double Speed Fan at ordinary times |
| CN204316180U (en) * | 2014-12-31 | 2015-05-06 | 烟台金正环保科技有限公司 | Dual-power automatic switching water supply equipment control system |
| CN105429512A (en) * | 2014-09-17 | 2016-03-23 | 湖北金环股份有限公司 | Auto-transformer step-down starting cabinet |
| CN207399062U (en) * | 2017-11-02 | 2018-05-22 | 中国航发哈尔滨东安发动机有限公司 | A kind of double-speed motor control circuit |
-
2017
- 2017-11-02 CN CN201711065666.5A patent/CN107800349A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204099253U (en) * | 2014-08-18 | 2015-01-14 | 深圳市建筑设计研究总院有限公司 | A kind of fire-fighting is held concurrently the control system of dual-purpose Double Speed Fan at ordinary times |
| CN105429512A (en) * | 2014-09-17 | 2016-03-23 | 湖北金环股份有限公司 | Auto-transformer step-down starting cabinet |
| CN204316180U (en) * | 2014-12-31 | 2015-05-06 | 烟台金正环保科技有限公司 | Dual-power automatic switching water supply equipment control system |
| CN207399062U (en) * | 2017-11-02 | 2018-05-22 | 中国航发哈尔滨东安发动机有限公司 | A kind of double-speed motor control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409462A (en) * | 2020-04-24 | 2020-07-14 | 无锡小刀电动科技股份有限公司 | Double-power control system for electric vehicle |
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