CN106330049A - Full-automatic AC motor power saving device - Google Patents
Full-automatic AC motor power saving device Download PDFInfo
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- CN106330049A CN106330049A CN201610612570.5A CN201610612570A CN106330049A CN 106330049 A CN106330049 A CN 106330049A CN 201610612570 A CN201610612570 A CN 201610612570A CN 106330049 A CN106330049 A CN 106330049A
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- Prior art keywords
- circuit
- electric motor
- switch
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Classifications
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- 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
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a full-automatic AC motor power saving device. The power supply voltage of an electric machine is regulated in real time by collecting the power factor of a motor at work. The voltage is regulated by a multi-tap autotransformer. The actual power factor of an AC motor is compared with multiple set reference values, and the comparison result controls the corresponding tap of a gated transformer, and changes the transformation ratio of the transformer (namely, changing the output voltage of the transformer) to enable the transformer to meet the actual power supply demand of a load. Through the mode of voltage-regulation energy saving in which the power supply voltage is regulated in real time according to the load change, the running efficiency of the motor is improved greatly, the phenomenon that 'a large motor drives a small cart' is avoided, and the purpose of efficient energy saving is achieved.
Description
Technical field
The present invention relates to a kind of electric motor electricity-saving device, particularly relate to a kind of full-automatic AC electric motor electricity-saving device
Energy-saving technical scheme, belongs to power-saving technology and electronic circuit design field.
Background technology
Economy Development, electric power is wanted in advance.In recent years, along with developing rapidly of China's economy, a lot of developed areas go out
Having showed the electric power nervous situation that supply falls short of demand, this directly constrains the economic development in these areas, and, in the face of non-renewable
Primary energy, such as the exhaustion of the resources such as coal, oil, natural gas, the energy saving research of our electrical equipment to be devoted to.And motor
It is again a kind of highly energy-consuming power-equipment that application amount is big, range is wide, adds up according to related data, China's motor power consumption
Accounting for the 60%～70% of commercial power total amount, during this applies mainly due to reality, a lot of motor too greatly considers
Safe clearance so that it is be chronically at light running state so that the work efficiency of motor is very low, so causes serious
Energy waste.Therefore, motor being carried out Energy Saving Control, the work efficiency of lifting motor, save electricity is for the energy day by day
Rare society has very important practical significance, is also instant crucial behave.
It is known that the operational efficiency of motor is relevant with load, when motor runs near nominal load,
Efficiency and power factor are the highest, but when load factor is relatively low, its power factor and efficiency the most drastically decline, and according to exchange
Asynchronous motor operating characteristic, its power factor is the highest in the operational efficiency of about 0.8, and running speed is by the size shadow of voltage
Ring little, thus the present invention uses the control mode of pressure regulating energy-saving, i.e. by gathering the electric parameter in motor running, obtains
Taking power factor actual value, then compare with setting value, comparative result controls the shunting switch of multi-tap transformator, changes
The output voltage values of transformator, makes the supply voltage of motor follow the change of load and change, and the most just can rationally realize adjusting
Press energy-conservation purpose.
Summary of the invention
The present invention is very low for solving operational efficiency in the actual application of motor, problem that power consumption is the biggest and send out
Bright design.Full-automatic AC electric motor electricity-saving device is mainly made up of main circuit and control circuit.Wherein main circuit includes: other
Road/energy-conservation permutator, sub-connecting switch of transformer (electric switch or electrical switch), transformator etc.；Control circuit includes: electronic
Dynamo-electric parameter Acquisition Circuit, power factor obtain circuit, window comparator circuit, switch driving circuit, zero passage detection and fault inspection
Slowdown monitoring circuit etc..
This invention main circuit can realize the bypass start-up of battery saving arrangement and energy-conservation fortune by the switching in order of three switches
The seamless switching of row；High voltage side of transformer uses multi-tap design, and the selection of each transformation ratio is opened by the tap being connected with tap
Close and control, and the control signal of shunting switch comes from control circuit.
This invention control circuit realizes the collection of voltage in motor running, current signal, the calculating of actual power factor,
Power factor actual value and the comparison of setting value, comparative result is through associated driver circuitry driving transformer shunting switch, it is achieved
Changing real-time pressure regulating energy-saving according to load, zero cross detection circuit makes sub-connecting switch of transformer in zero crossing action, it is ensured that switch is dynamic
The security reliability made, reduces and even avoids the impact of overvoltage to endanger.Failure detector circuit real-time inspection and control signal, works as control
Signal processed or switch motion occur extremely to automatically switch to bypass power supply, prevent incorrect switching from causing the faults such as short circuit,
Do not affect load properly functioning under conditions of be also convenient for timely, the security maintenance of battery saving arrangement simultaneously.
Beneficial effects of the present invention:
1. motor can be made to realize bypass mains-supplied and to run the seamless switching run with pressure regulating energy-saving；
2., according to load change, use autotransformer multi-tap form to realize multistage effective tune of motor supply voltage
Joint, thus improve the operational efficiency of motor, it is greatly saved electric energy；
3. main circuit bypass/energy-conservation permutator and sub-connecting switch of transformer have multiple choices, can be selected for the work longevity
Life is long, the electric switch of the high reliability such as the catalyst that is swift in motion, relay, it is also possible to be that volume is little, response speed is fast
The contactless electronic beam switch such as controllable silicon, IGBT, Darlington transistor；
4. transformator multi-tap design, each voltage gear making transformator export is relative with each power factor setting value
Should；
5. use zero cross detection circuit to make switch motion have more safety and stability；
6. use failure detector circuit can switch to bypass power supply in time when guaranteeing battery saving arrangement fault, and do not affect load
Safe operation, simultaneously also can facilitate maintainer quick lock in trouble point, carry out working service.
Accompanying drawing explanation
Fig. 1 is the main circuit schematic diagram of full-automatic AC electric motor electricity-saving device.
Wherein: KM1, KM2, KM3 are bypass/energy-conservation permutator；C1, C2 are multi-tap transformator；K11、K12、K13、
K14 is the shunting switch of transformator C1；K21, K22, K23, K24 are the shunting switch of transformator C2.
Fig. 2 is the theory diagram of power factor comparison circuit.
Wherein: 1-logic circuit；2-drive circuit；3-sub-connecting switch of transformer.
Fig. 3 is that silicon control zero-cross triggers circuit theory diagrams.
Wherein: T11, T12 are controllable silicon both end voltage signal；QD1 is that transformer gear selects signal；G11, G12 are can
Control silicon controls pole signal；Q1 is NPN type triode；Uxx is integrated circuit；Cxx is electric capacity；Rxx is resistance.
Detailed description of the invention
Below the present invention is elaborated by cooperation accompanying drawing.The present embodiment enters under premised on technical solution of the present invention
Row is implemented, and provides detailed embodiment, but protection scope of the present invention is not limited to following embodiment.
The present invention is for solving the problem of the electric energy serious waste that motor is chronically at underloading or Light Condition causes
Invention design.By gathering the electric parameter that motor runs, obtaining actual power factor, power factor can conscientiously reflected load
Situation of change, then by the comparison of the actual value of power factor Yu setting value, output comparative result controls the tap of transformator and opens
Pass action, selects suitable motor voltage gear, makes motor voltage follow load real-time change, is in all the time
Energy-efficient running status.
This invention is mainly made up of main circuit and control circuit.Main circuit part mainly includes bypass/energy-conservation permutator,
Sub-connecting switch of transformer (electric switch or electrical switch) and transformator etc., as shown in Figure 1.In figure, KM1, KM2, KM3 are bypass
Switching with energy-conservation switching, its switching sequence of conservative control can ensure that handoff procedure does not affect the properly functioning of motor.Bypass
In operation, KM2 closes, KM1 and KM3 disconnects；When bypass transfers energy-saving run to, when i.e. battery saving arrangement starts, the action of switch is suitable
Sequence is: KM3 Guan Bi, KM2 disconnect, KM1 Guan Bi；Energy-conservation be switched to bypass run time: KM1 disconnect, KM2 Guan Bi, KM3 disconnect.Become
Depressor C1, C2 primary side is multi-tap form, K11～K14, K21～K24 are sub-connecting switch of transformer, and switch controlling signal comes
From in control circuit, and the long conducting of B phase in three-phase electricity.
Control circuit includes: electric parameter Acquisition Circuit, power factor obtain and change-over circuit, comparison circuit and drive circuit
Deng.Described electric parameter Acquisition Circuit is to gather the voltage in electric motor operation and current signal；Power factor obtains by counting
Circuit, logic gates, storage circuit realize with D/A change-over circuit；Comparison circuit i.e. power factor actual value and setting value
Relatively, as in figure 2 it is shown, comparative result is through logic circuit 1 and drive circuit 2, obtain the control signal of sub-connecting switch of transformer,
Sub-connecting switch of transformer 3 can be selected for multiple switch, such as relay, catalyst, IGBT, Darlington transistor, controllable silicon etc..
In actual application, different according to the shunting switch selected, different drivings should be used or trigger circuit.Focus on below
Introduce thyristor gating circuit.Controllable silicon (can be selected for bidirectional triode thyristor or by one-way SCR reverse parallel connection, this sentence unidirectional can
As a example by control silicon.) be a kind of large power semiconductor device, have that volume is little, response speed is fast, contactless, no-spark, noiselessness,
High efficiency, low cost etc. switchs advantage.It is illustrated in figure 3 the circuit theory diagrams that silicon control zero-cross triggers.Reverse-blocking tetrode thyristor characteristic:
When controllable silicon anode potential is higher than cathode potential, and when controlling pole added with forward triggering pulse, controlled silicon conducting；When controllable silicon is cloudy
Electrode potential is less than higher than anode potential or anode current when maintaining electric current, and controllable silicon turns off.In Fig. 3, T11, T12 are controllable silicon two
Terminal voltage signal, G11, G12 are the control pole signal of two inverse parallel one-way SCRs, and U1, U2 constitute voltage follower circuit,
U3 is Zero-cross comparator circuit, and QD1 is transformer tapping gating signal, and U6 is trigger, and U7, U8, U9 are optocoupler, and this circuit is the most real
Existing, when, at voltage over zero and when QD1 is high level, SCR control pole just has forward and triggers signal so that it is conducting.As
This just can make this battery saving arrangement realize, and dynamic response time is short, quick and the change of safe follow load, it is to avoid non-zero crossing occur
Switch and electrical network will be caused powerful interference and load is caused the phenomenon of enormous impact.
Last it should be understood that above are only embodiments of the invention, it is not that embodiments of the present invention are carried out
Limit, every utilize description of the invention and accompanying drawing content, the present invention is applied to other correlative technology fields, all should contain
Among protection scope of the present invention.
Claims (10)
1. a full-automatic AC electric motor electricity-saving device, is mainly made up of main circuit and control circuit, and wherein main circuit is main
Including: bypass/energy-conservation permutator, sub-connecting switch of transformer (electric switch or electrical switch) and multi-tap transformator, control
Circuit specifically includes that electric parameter of electric motor Acquisition Circuit, power factor obtain circuit, window comparator circuit, switch driving circuit,
Zero passage detection and failure detector circuit, it is characterised in that: by gathering actual power factor in electric motor operation, regulate electricity in real time
The supply voltage of motivation, i.e. realizes being supplied the most required characteristics of power supply, load can be run efficient energy-saving.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described transformator is
Autotransformer multi-tap form, i.e. divides multiple voltage gear according to electric motor operation characteristic.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described main circuit can
Realize the function of bypass and energy-conservation seamless switching, main circuit permutator sequence of movement realize.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described bypass/joint
Energy permutator and sub-connecting switch of transformer have multiple choices, can be selected for high performance relay, the such machine of catalyst
Tool switchs, it is also possible to be volume is little, response speed is fast controllable silicon, IGBT, Darlington transistor such electronic non-contact switch.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described electric parameter is adopted
Collector collection is the voltage in motor running and current signal.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described power factor
Obtaining circuit uses hardware counting circuit and logic circuit to obtain voltage, the phase contrast of current signal, and is converted into counting
Impulse form.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described window compares
Circuit is used for comparing power factor actual value and setting value, the foundation that comparative result selects as supply voltage gear.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described switch drive
Circuit has different drive forms according to the sub-connecting switch of transformer difference selected.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described zero passage detection
Circuit can ensure sub-connecting switch of transformer action safety, allows shunting switch triggering and conducting or pass at curtage zero crossing
Disconnected.
A kind of full-automatic AC electric motor electricity-saving device the most according to claim 1, it is characterised in that: described fault is examined
The output signal of slowdown monitoring circuit monitoring shunting switch, finds that battery saving arrangement maloperation can switch to bypass in time and run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610612570.5A CN106330049A (en) | 2016-07-21 | 2016-07-21 | Full-automatic AC motor power saving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610612570.5A CN106330049A (en) | 2016-07-21 | 2016-07-21 | Full-automatic AC motor power saving device |
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| CN106330049A true CN106330049A (en) | 2017-01-11 |
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| CN201610612570.5A Pending CN106330049A (en) | 2016-07-21 | 2016-07-21 | Full-automatic AC motor power saving device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200241502A1 (en) * | 2019-01-28 | 2020-07-30 | Kabushiki Kaisha Yaskawa Denki | Industrial machine management system, method for managing industrial machine, and non-transitory computer-readable storage medium |
Citations (7)
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|---|---|---|---|---|
| JPH05236795A (en) * | 1992-02-19 | 1993-09-10 | Hi Tech Lab Inc | Controller and control method for induction motor |
| US6559619B1 (en) * | 2000-07-25 | 2003-05-06 | Daniel G. Bach | Energy management controller |
| CN101090252A (en) * | 2006-04-30 | 2007-12-19 | 梁忠民 | Electric saving method for AC motor and corresponding AC motor electric saver |
| CN102522946A (en) * | 2012-01-06 | 2012-06-27 | 神华集团有限责任公司 | Method, device and system for controlling fan motor |
| CN202309094U (en) * | 2011-11-15 | 2012-07-04 | 齐齐哈尔大学 | Intelligent energy-saving controller for electric motor |
| CN105656383A (en) * | 2016-03-09 | 2016-06-08 | 王振铎 | Full-automatic alternating-current motor electricity saving device |
| CN105680456A (en) * | 2016-03-22 | 2016-06-15 | 广州开能电气实业有限公司 | Capacitor zero-crossing switching module |
-
2016
- 2016-07-21 CN CN201610612570.5A patent/CN106330049A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05236795A (en) * | 1992-02-19 | 1993-09-10 | Hi Tech Lab Inc | Controller and control method for induction motor |
| US6559619B1 (en) * | 2000-07-25 | 2003-05-06 | Daniel G. Bach | Energy management controller |
| CN101090252A (en) * | 2006-04-30 | 2007-12-19 | 梁忠民 | Electric saving method for AC motor and corresponding AC motor electric saver |
| CN202309094U (en) * | 2011-11-15 | 2012-07-04 | 齐齐哈尔大学 | Intelligent energy-saving controller for electric motor |
| CN102522946A (en) * | 2012-01-06 | 2012-06-27 | 神华集团有限责任公司 | Method, device and system for controlling fan motor |
| CN105656383A (en) * | 2016-03-09 | 2016-06-08 | 王振铎 | Full-automatic alternating-current motor electricity saving device |
| CN105680456A (en) * | 2016-03-22 | 2016-06-15 | 广州开能电气实业有限公司 | Capacitor zero-crossing switching module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200241502A1 (en) * | 2019-01-28 | 2020-07-30 | Kabushiki Kaisha Yaskawa Denki | Industrial machine management system, method for managing industrial machine, and non-transitory computer-readable storage medium |
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| PB01 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170209 Address after: Neighborhood rent residential Dongsheng District No. 17 North Road 017000 the Inner Mongolia Autonomous Region city Erdos Yi Hua No. 8 Building 1 unit 502 Applicant after: Fan Yanbiao Address before: 017000 high tech Industrial Park, Ordos City, the Inner Mongolia Autonomous Region hi tech building, room 1210 Applicant before: Wang Zhenduo |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170111 |
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| WD01 | Invention patent application deemed withdrawn after publication |