CN110365253A - AC asynchronous motor starting and protection, energy saver - Google Patents

AC asynchronous motor starting and protection, energy saver Download PDF

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Publication number
CN110365253A
CN110365253A CN201811640307.2A CN201811640307A CN110365253A CN 110365253 A CN110365253 A CN 110365253A CN 201811640307 A CN201811640307 A CN 201811640307A CN 110365253 A CN110365253 A CN 110365253A
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CN
China
Prior art keywords
switch
iron core
balance type
electromagnetic balance
regulatable reactor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201811640307.2A
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Chinese (zh)
Inventor
王振铎
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Individual
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Individual
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Publication date
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Priority to CN201811640307.2A priority Critical patent/CN110365253A/en
Publication of CN110365253A publication Critical patent/CN110365253A/en
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Classifications

    • 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
    • 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
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • 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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/26—Power factor control [PFC]
    • 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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
    • 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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
    • 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
    • H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/01—Asynchronous machines

Abstract

The invention discloses a kind of starting of AC asynchronous motor and protective devices comprising electromagnetic balance type REgulatable reactor, current detection means, comparison controller；The current detection means is equipped on the output end of the electromagnetic balance type REgulatable reactor, the current detection means is connect with the comparison controller, and the comparison controller controls the opening and closing of the end switching switch and gear switch switch.Advantage is: adjustment process is steady; there is no any additional harmonic; and protection process will not cause big impact; since executive component is mechanical organ; so its strong antijamming capability; failure rate is low, and safe life is long, will not pollute to power grid; reduce the composite impact of power grid; also the capacity of matching transformer can be reduced, power grid construction cost and operating cost are reduced, since defencive function is reliable; reduce motor and the maintenance cost with mesh element; the fever of distribution component and motor is reduced, securely and reliably, and energy conservation.

Description

AC asynchronous motor starting and protection, energy saver
Technical field:
The present invention relates to a kind of power equipment more particularly to a kind of starting of AC asynchronous motor and protective energy conservation devices.
Background technique:
The advantages that AC asynchronous motor has structure simple, and performance is stablized, technology maturation, thus be widely used in each In the dragging of kind of power-equipment, the starting of existing AC asynchronous motor is usually required that as reduced-voltage starting, corresponding to be become using decompression Depressor uses power electronic devices, but when use step-down transformer, during startup, there are voltage jump processes, and And start-up course needs instant cut-off, causes rush of current；And biggish harmonic wave can be generated using power electronic devices, use frequency conversion Motor is caused to send out since power electronic devices can generate harmonic wave abundant using low-frequency start when governor carries out frequency control Heat is easily damaged, and power electronic devices impact resistance is poor, and failure rate is higher, and maintenance cost is high.
Summary of the invention:
The first purpose of this invention is to provide a kind of capacity for reducing AC asynchronous motor matching transformer, reduce The starting of the AC asynchronous motor of power grid construction cost and operating cost and protective device.
Second object of the present invention is to provide a kind of capacity for reducing AC asynchronous motor matching transformer, reduce Power grid construction cost and operating cost reduce the fever of distribution component and motor, safe and reliable, energy-efficient alternating current asynchronous electricity Motivation starting and protective energy conservation device.
The present invention is implemented by following technical solution:
AC asynchronous motor starting and protective device comprising electromagnetic balance type REgulatable reactor, current detection means, Comparison controller；The electromagnetic balance type REgulatable reactor includes the positive coil wound on iron core and the iron core, described On iron core also winding be equipped with it is identical as the positive coil turn, around to opposite reverse winding；The adjacent positive coil One end is connect with described reverse winding one end, the input terminal as the electromagnetic balance type REgulatable reactor；The reverse winding The other end and end switch switch one end and connect；The end switching switch other end and the positive coil other end connect It connects, the output end as the electromagnetic balance type REgulatable reactor；More than one positive line is equipped on the positive coil Enclose tap；Identical reverse winding tap corresponding with described forward direction coil tap the number of turns is equipped on the reverse winding；It is each pair of The number of turns corresponds to the identical positive coil tap and the reverse winding tap and passes through a gear switch switch connection；Described The output end of electromagnetic balance type REgulatable reactor is equipped with the current detection means, and the current detection means is compared with described Controller connection, sends the comparison controller for current signal；The comparison controller is opened with end switching respectively It closes and gear switch switch connects, control the opening and closing of the end switching switch and gear switch switch.
The iron core in AC asynchronous motor starting and protective device is C-shaped iron core, E shape iron core, R shape iron core, stick Any one of shape iron core or annular core.
AC asynchronous motor starting and protective energy conservation device comprising electromagnetic balance type REgulatable reactor, power factor Detection device, comparison controller；The electromagnetic balance type REgulatable reactor includes the positive line wound on iron core and the iron core Circle, on the iron core also winding be equipped with it is identical as the positive coil turn, around to opposite reverse winding；Adjacent is described Positive coil one end is connect with described reverse winding one end, the input terminal as the electromagnetic balance type REgulatable reactor；It is described The other end of reverse winding switches switch one end with end and connect；The end switching switch other end and the positive coil are another One end connection, the output end as the electromagnetic balance type REgulatable reactor；It is equipped on the positive coil more than one Positive coil tap；Identical reverse winding corresponding with described forward direction coil tap the number of turns is equipped on the reverse winding to take out Head；Each pair of the number of turns corresponds to the identical positive coil tap and the reverse winding tap and is connected by a gear switch switch It connects；The power factor detection device, the power factor are equipped on the output end of the electromagnetic balance type REgulatable reactor Detection device is connect with the comparison controller, sends the comparison controller for power factor signal；It is described relatively to control Device switches switch with the end respectively and gear switch switch connects, and controls the end switching switch and the gear Switch the opening and closing of switch.
The iron core in AC asynchronous motor starting and protective energy conservation device is C-shaped iron core, E shape iron core, R shape iron Any one of core, stick iron core or annular core.
Advantages of the present invention: adjustment process is steady, and without any additional harmonic, and it is big to protect process that will not cause Impact, since executive component is mechanical organ, so its strong antijamming capability, failure rate is low, and safe life is long, will not be right Power grid pollutes, and reduces the composite impact of power grid, can also reduce the capacity of matching transformer, reduces power grid construction cost and fortune Row cost reduces motor and the maintenance cost with mesh element since defencive function is reliable, reduces distribution component and motor Fever, securely and reliably, and energy conservation.
Detailed description of the invention:
Fig. 1 is the connection schematic diagram of embodiment 1.
Fig. 2 is the connection schematic diagram of embodiment 2.
Electromagnetic balance type REgulatable reactor 1, iron core 11, positive coil 12, reverse winding 13, end switching switch 14, just It is opened to coil tap 15, reverse winding tap 16, gear switch switch 17, current detection means 2, comparison controller 3, motor Dynamic switch 4, AC asynchronous motor 5, power factor detection device 6.
Specific embodiment:
Embodiment 1: as shown in Figure 1, AC asynchronous motor starting and protective device comprising electromagnetic balance type adjustable electric Anti- device 1, current detection means 2, comparison controller 3；The electromagnetic balance type REgulatable reactor 1 includes iron core 11 and the iron core The positive coil 12 wound on 11, iron core 11 are annular core；Or iron core 11 is E shape iron core；Or iron core 11 is stick iron core, stick The cross section of shape iron core is round or arbitrary polygon；Or iron core 11 is C-shaped iron core；On the iron core 11 also winding be equipped with Described forward direction coil 12 the number of turns is identical, around to opposite reverse winding 13；Adjacent described positive 12 one end of coil and described anti- It is connected to 13 one end of coil, the input terminal as the electromagnetic balance type REgulatable reactor 1；The electromagnetic balance type adjustable electric The input terminal of anti-device 1 is connect with motor start-up switch 4, and the other end of the reverse winding 13 and end switch 14 one end of switch Connection；End switching 14 other end of switch is connect with positive 12 other end of coil, can as the electromagnetic balance type Adjust the output end of reactor 1；The output end of the electromagnetic balance type REgulatable reactor 1 is connect with AC asynchronous motor 5；Institute State positive coil tap 15 there are three setting on positive coil 12；It is equipped on the reverse winding 13 and the positive coil tap 15 the number of turns correspond to identical reverse winding tap 16；Each pair of the number of turns corresponds to the identical positive coil tap 15 and the reverse line Tap 16 is enclosed to connect by a gear switch switch 17；The output end of the electromagnetic balance type REgulatable reactor 1 with exchange The current detection means 2 is equipped between asynchronous motor 5；The current detection means 2 is connect with the comparison controller 3, The comparison controller 3 is sent by the current signal of AC asynchronous motor 5；The comparison controller 3 respectively with the end Head switching switch 14 and the gear switch switch 17 connection, control the end switching switch 14 and gear switch switch 17 opening and closing.
Operation instruction: when AC asynchronous motor 5 starts, the comparison controller 3 is real by the current detection means 2 When the setting starting electricity of the real-time starting current of the AC asynchronous motor 5 and the AC asynchronous motor 5 that detects Stream (the setting starting current is greater than rated current) is compared；According to the law of electromagnetic induction and the right-hand rule, when electric current side To it is identical when, positive coil 12 and contrary around the induced magnetic field generated into opposite reverse winding 13 offsets each other Effect, the magnetic field strength of electromagnetic balance type REgulatable reactor 1 is equal to the positive generation magnetic field of coil 12 and reverse winding 13 generates magnetic The vector sum of field；When real-time starting current is less than setting starting current, successively it is closed by electromagnetic balance type REgulatable reactor 1 The gear switch switch 15 of the input terminal to output end, the reactance value size of adjustment electromagnetic balance type REgulatable reactor 1 are right Real-time starting current is controlled；Until the closure end switches switch 14 after real-time starting current is less than rated current, when End switches switch 14 and is closed, and the induced magnetic field generated in positive coil 12 and reverse winding 13 is cancelled out each other, electromagnetic balance type REgulatable reactor 1 is integral into short-circuit condition.
In 5 operational process of AC asynchronous motor, when the friendship that 2 real-time detection of current detection means arrives After the operating current of stream asynchronous motor 5 is greater than rated current and continues setting time, comparison controller 3 disconnects the end and cuts Switch 14 is changed, the gear switch switch 15 of the output end by electromagnetic balance type REgulatable reactor 1 to input terminal is successively closed, One gear switch switch 15 of every closure, and setting time is kept, until the operating current of the motor 5 is less than rated current simultaneously After continuing setting time, the control of comparison controller 3 is successively closed by the input terminal of electromagnetic balance type REgulatable reactor 1 to output end Gear switch switch 15, one gear switch switch 15 of every closure keep setting time, when until end switching switch 14 closes It closes；During gear switch switch 15 of the output end by electromagnetic balance type REgulatable reactor 1 to input terminal, when closing After closing the gear switch switch 15 adjacent with electromagnetic balance type 1 input terminal of REgulatable reactor and continuing setting time, operating current It is still greater than rated current, then disconnects motor start-up switch 4, powers off AC asynchronous motor 5；It is opened by the switching of switching end The reactance value size for closing 14 and the adjustment electromagnetic balance type REgulatable reactor 1 of gear switch switch 15, to AC asynchronous motor 5 Operating current is controlled.
Embodiment 2: as shown in Fig. 2, AC asynchronous motor starting and protective energy conservation device comprising electromagnetic balance type can Adjust reactor 1, power factor detection device 6, comparison controller 3；The electromagnetic balance type REgulatable reactor 1 includes iron core 11 With the positive coil 12 wound on the iron core 11, iron core 11 is annular core；Or iron core 11 is E shape iron core；Or iron core 11 is Stick iron core, the cross section of stick iron core are round or arbitrary polygon；Or iron core 11 is C-shaped iron core；On the iron core 11 Also winding be equipped with it is identical as described positive 12 the number of turns of coil, around to opposite reverse winding 13；The adjacent positive coil 12 One end is connect with described 13 one end of reverse winding, the input terminal as the electromagnetic balance type REgulatable reactor 1；The electromagnetism is flat The input terminal of weighing apparatus type REgulatable reactor 1 is connect with motor start-up switch 4, and the other end of the reverse winding 13 and end switch The connection of 14 one end of switch；End switching 14 other end of switch is connect with positive 12 other end of coil, as the electricity The output end of magnetic balance type REgulatable reactor 1；The output end and AC asynchronous motor of the electromagnetic balance type REgulatable reactor 1 5 connections；Positive coil tap 15 there are three being set on the positive coil 12；On the reverse winding 13 be equipped with it is described just Identical reverse winding tap 16 is corresponded to 15 the number of turns of coil tap；Each pair of the number of turns corresponds to 15 He of the identical positive coil tap The reverse winding tap 16 is connected by a gear switch switch 17；In the defeated of the electromagnetic balance type REgulatable reactor 1 The power factor detection device 6 is equipped between outlet and AC asynchronous motor 5；The power factor detection device 6 and institute The connection of comparison controller 3 is stated, sends the comparison controller 3 for the power factor signal of AC asynchronous motor 5；The ratio Switch switch 14 with the end respectively compared with controller 3 and the gear switch switch 17 is connect, controls the end switching and open Close the opening and closing of 14 and the gear switch switch 17.
Operation instruction: when AC asynchronous motor 5 starts, the power factor is detected and is filled by the comparison controller 3 Set 6 real-time detections to the setting of real-time starting current and the AC asynchronous motor 5 of the AC asynchronous motor 5 open Streaming current (the setting starting current is greater than rated current) is compared；According to the law of electromagnetic induction and the right-hand rule, work as electricity Flow direction it is identical when, positive coil 12 and contrary around the induced magnetic field generated into opposite reverse winding 13 has mutually Negative function, the magnetic field strength of electromagnetic balance type REgulatable reactor 1 are equal to positive coil 12 and generate magnetic field and the production of reverse winding 13 The vector sum of magnetisation field；When real-time starting current is less than setting starting current, successively it is closed by electromagnetic balance type regulative reactance The input terminal of device 1 to output end the gear switch switch 15, adjust electromagnetic balance type REgulatable reactor 1 reactance value it is big It is small, real-time starting current is controlled；Until real-time starting current is less than the closure end switching switch after rated current 14, when end, switching switch 14 is closed, and the induced magnetic field generated in positive coil 12 and reverse winding 13 is cancelled out each other, and electromagnetism is flat Weighing apparatus type REgulatable reactor 1 is integral into short-circuit condition.
In 5 operational process of AC asynchronous motor, arrived when 6 real-time detection of power factor detection device After the power factor of the AC asynchronous motor 5 is greater than rated power factor and continues setting time, comparison controller 3 is disconnected The end switches switch 14, is successively closed the gear of the output end by electromagnetic balance type REgulatable reactor 1 to input terminal Switch switch 15, one gear switch switch 15 of every closure, and keep setting time, up to the motor 5 operating power because After number is less than rated power factor and continues setting time, comparison controller 3 is controlled by the defeated of electromagnetic balance type REgulatable reactor 1 Enter end and be successively closed gear switch switch 15 to output end, one gear switch switch 15 of every closure keeps setting time, when straight It is closed to end switching switch 14；In the gear switch of the output end by electromagnetic balance type REgulatable reactor 1 to input terminal During switch 15, when the closure gear switch switch 15 adjacent with electromagnetic balance type 1 input terminal of REgulatable reactor and continue After setting time, operating power factor is still greater than rated power factor, then disconnects motor start-up switch 4, keeps alternating current asynchronous electric Motivation 5 powers off；Switch switch 14 by switching end and gear switch switch 15 adjusts the electricity of electromagnetic balance type REgulatable reactor 1 Anti- value size, controls the operating power factor of AC asynchronous motor 5.

Claims (4)

1. AC asynchronous motor starting and protective device, which is characterized in that it includes electromagnetic balance type REgulatable reactor, electric current Detection device, comparison controller；The electromagnetic balance type REgulatable reactor includes the positive line wound on iron core and the iron core Circle, on the iron core also winding be equipped with it is identical as the positive coil turn, around to opposite reverse winding；Adjacent is described Positive coil one end is connect with described reverse winding one end, the input terminal as the electromagnetic balance type REgulatable reactor；It is described The other end of reverse winding switches switch one end with end and connect；The end switching switch other end and the positive coil are another One end connection, the output end as the electromagnetic balance type REgulatable reactor；It is equipped on the positive coil more than one Positive coil tap；Identical reverse winding corresponding with described forward direction coil tap the number of turns is equipped on the reverse winding to take out Head；Each pair of the number of turns corresponds to the identical positive coil tap and the reverse winding tap and is connected by a gear switch switch It connects；The current detection means, the current detection means are equipped on the output end of the electromagnetic balance type REgulatable reactor It is connect with the comparison controller, sends the comparison controller for current signal；The comparison controller respectively with it is described End switching switch and the gear switch switch connection, control the end switching switch and open with what the gear switch switched It closes.
2. AC asynchronous motor starting according to claim 1 and protective device, which is characterized in that the iron core is C Any one of shape iron core, E shape iron core, R shape iron core, stick iron core or annular core.
3. AC asynchronous motor starting and protective energy conservation device, which is characterized in that it include electromagnetic balance type REgulatable reactor, Power factor detection device, comparison controller；The electromagnetic balance type REgulatable reactor includes winding on iron core and the iron core Positive coil, on the iron core also winding be equipped with it is identical as the positive coil turn, around to opposite reverse winding；Phase Adjacent described positive coil one end is connect with described reverse winding one end, the input as the electromagnetic balance type REgulatable reactor End；The other end of the reverse winding switches switch one end with end and connect；The end switching switch other end and it is described just It is connected to the coil other end, the output end as the electromagnetic balance type REgulatable reactor；One is equipped on the positive coil A above positive coil tap；It is equipped on the reverse winding corresponding identical reversed with described positive coil tap the number of turns Coil tap；Each pair of the number of turns corresponds to the identical positive coil tap and the reverse winding tap is opened by a gear switch Connection connects；The power factor detection device, the power are equipped on the output end of the electromagnetic balance type REgulatable reactor Factor detection device is connect with the comparison controller, sends the comparison controller for power factor signal；The comparison Controller is connected with end switching switch and gear switch switch respectively, control end switching switch with it is described The opening and closing of gear switch switch.
4. AC asynchronous motor starting according to claim 3 and protective energy conservation device, which is characterized in that the iron core For any one of C-shaped iron core, E shape iron core, R shape iron core, stick iron core or annular core.
CN201811640307.2A 2018-12-29 2018-12-29 AC asynchronous motor starting and protection, energy saver Withdrawn CN110365253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811640307.2A CN110365253A (en) 2018-12-29 2018-12-29 AC asynchronous motor starting and protection, energy saver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811640307.2A CN110365253A (en) 2018-12-29 2018-12-29 AC asynchronous motor starting and protection, energy saver

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Publication Number Publication Date
CN110365253A true CN110365253A (en) 2019-10-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653366A (en) * 2020-12-02 2021-04-13 广东积微科技有限公司 Output inductance control method and device of multi-tap reactor and computer equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653366A (en) * 2020-12-02 2021-04-13 广东积微科技有限公司 Output inductance control method and device of multi-tap reactor and computer equipment

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