CN103490701A - Fully automatic three-phase motor power saver - Google Patents
Fully automatic three-phase motor power saver Download PDFInfo
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- CN103490701A CN103490701A CN201310384196.4A CN201310384196A CN103490701A CN 103490701 A CN103490701 A CN 103490701A CN 201310384196 A CN201310384196 A CN 201310384196A CN 103490701 A CN103490701 A CN 103490701A
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Abstract
The invention discloses a fully automatic three-phase motor power saver which comprises a three-phase current sampling circuit, a signal amplifying circuit and a triggering and power output controlling circuit. The three-phase current sampling circuit, the signal amplifying circuit and the triggering and power output controlling circuit are sequentially connected. The input end of the three-phase current sampling circuit is connected with a three-phase power supply. One end of a thyristor of the triggering and power output controlling circuit is connected with a three-phase motor. According to the fully automatic three-phase motor power saver, the three-phase current sampling circuit, the signal amplifying circuit and the triggering and power output controlling circuit are adopted, through the triggering and power output controlling circuit, the conduction angle of the thyristor of the triggering and power output controlling circuit can be changed, so that voltage applied on the motor is made to be increased or reduced.
Description
Technical field
The present invention relates to the electricity-saving appliance technical field, in particular to a kind of electricity saving device of full automatic three-phase motor.
Background technology
In industrial and agricultural production, extensively adopt three phase electric machine to do power.Motor is electrified major impetus machinery, is also energy consumption equipment main in electrical network.In China, approximately 1,000,000,000 alternating current motors come into operation, and power consumption accounts for 60% of electrical network total load, accounts for 70% of whole commercial power.The report of the authoritative iea of China is pointed out, China approximately has sixty percent motor to move under the underload state lower than design rated load 60%, the motor moved under this state, electricity consumption up to 30% is wasted, for this reason, China has formulated " People's Republic of China's energy conservation " and the preferential policies such as the loan of the energy-conservation technological transformation of being correlated with and tax revenue, encourages the Business Enterprise Adopting New Technology product to reduce energy consumption.
Along with the industrial production develop rapidly, energy bottleneck is more and more protrusion to the restriction of development.Enterprise is increasing to the conscious demand of products that save energy and resources, and the electrical machine energy-saving product that improves utilization rate of electrical has wide potentiality to be exploited and the market space.
The current factory generally selected motor of plant equipment of use is all that the maximum power required according to machinery come supporting, the fully loaded in actual use time seldom, as press machine, stretcher, injection machine etc. are all intermittently useds, motor moves under be everlasting zero load or light condition, causes power wastage.In analytic process, we find that the common motor power factor that exists of business equipment is lower, and power consumption only accounts for 30%-40% at full capacity, and standby load takies electric weight 80%, and power factor also changes between 0.5-0.8.Low power factor is the main factor of waste electric energy.
Summary of the invention
The object of the invention is to overcome the above problem that prior art exists, provide a kind of can be according to the electricity saving device of full automatic three-phase motor of the variation self-regulation motor power output of motor load.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of electricity saving device of full automatic three-phase motor, comprise successively connected three-phase current sample circuit, signal amplification circuit, triggering and power output control circuit; Described three-phase current sample circuit input is connected with three phase mains, and thyristor one end of described triggering and power output control circuit is connected with three phase electric machine; Also comprise the power supply circuits that are connected in three-phase circuit, described power supply circuits are connected with described signal amplification circuit.
Further, described signal amplification circuit comprises anti-phase compute chip and homophase compute chip, described anti-phase compute chip output by diode and described homophase compute chip in the same way input be connected.
Further, described triggering and power output control circuit comprise the sub-circuits for triggering that are respectively used to control each phase, described sub-circuits for triggering comprise optocoupler, triode, bridge rectifier, thyristor, the output of described signal amplification circuit is connected with described optocoupler input respectively through current-limiting resistance, one road output head grounding of optocoupler, another road output is connected with described transistor base through resistance, described transistor collector is connected with the bridge rectifier input with emitter, an output of described bridge rectifier passes through respectively diac, electric capacity is connected with described thyristor.
Preferably, described thyristor two ends are provided with operating state LED indicating circuit.
The invention has the beneficial effects as follows:
1, three-phase current sample circuit, signal amplification circuit, triggering and power output control circuit have been adopted, by triggering and power output control circuit, can make the thyristor angle of flow in triggering and power output control circuit be changed, the voltage that makes to be added on motor raises or reduces.
2, signal amplification circuit U2, amplified shaping, anti-phase to the direct current signal of three-phase current sample circuit U1.
3, triggering and power output control circuit U3 control respectively the angle of flow of thyristor according to the driving signal of signal amplification circuit U2, realize that the voltage and current of motor is controlled, and reach the purpose of economize on electricity.
4, because having adopted three-phase current sampling testing circuit and signal amplification circuit, so remove from, adjust working point in the three phase electric machine use procedure.
5, electricity saving device of full automatic three-phase motor, electricity-saving appliance is simple in structure, and volume is little, lightweight, easy for installation, and power savings is obvious, is particularly suitable for the frequent variation of load and intermittently used three phase electric machine and supports the use.Can be widely used in all trades and professions that motor is used as power.Be adapted to the constant plant equipment of rotating speed such as arrangement for electric sewing machine, punch press, sander, lathe, drilling machine, air compressor, planer, ball mill.Under idle state, power saving rate reaches 15%, and under meritorious state, power saving rate reaches 45%.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and coordinate accompanying drawing to be described in detail as follows.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
The block diagram that Fig. 1 is circuit of the present invention;
Fig. 2 is preferred embodiment of the present invention circuit theory diagrams.
Number in the figure explanation: U1, three-phase current sample circuit, U2, signal amplification circuit, U3, triggering and power output control circuit, U3-0, sub-circuits for triggering, U4, power supply circuits, ICIA, anti-phase compute chip, ICIB, homophase compute chip, VT1, optocoupler, VT2, triode, VT3, thyristor, D1, diode, D2, bridge rectifier, DZ, diac, C, electric capacity, R1, current-limiting resistance, R2, resistance, M, three phase electric machine.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Shown in Fig. 1, a kind of electricity saving device of full automatic three-phase motor, comprise successively connected three-phase current sample circuit U1, signal amplification circuit U2, triggering and power output control circuit U3; Described three-phase current sample circuit U1 input is connected with three phase mains, and thyristor VT3 mono-end of described triggering and power output control circuit U3 is connected with three phase electric machine M; Also comprise the power supply circuits U4 be connected in three-phase circuit, described power supply circuits U4 is connected with described signal amplification circuit U2.
Shown in Fig. 2, described signal amplification circuit U2 comprises anti-phase compute chip ICIA and homophase compute chip ICIB, described anti-phase compute chip ICIA output by diode D1 and described homophase compute chip ICIB in the same way input be connected.
Shown in Fig. 2, described triggering and power output control circuit U3 control respectively the angle of flow of thyristor VT3 according to the driving signal of signal amplification circuit U2, realize that the voltage and current of motor is controlled, and reach the purpose of economize on electricity.Described triggering and power output control circuit U3 comprise the sub-circuits for triggering U3-0 that is respectively used to control each phase, described sub-circuits for triggering U3-0 comprises optocoupler VT1, triode VT2, bridge rectifier D 2, thyristor VT3, the output of described signal amplification circuit U2 is connected with described optocoupler VT1 input respectively through current-limiting resistance R1, optocoupler VT1 mono-road output head grounding, another road output is connected with described triode VT2 base stage through resistance R 2, described triode VT2 collector electrode is connected with bridge rectifier D 2 inputs with emitter, an output of described bridge rectifier D 2 is respectively by diac DZ, capacitor C is connected with described thyristor VT3.
Described thyristor VT3 two ends are provided with operating state LED indicating circuit.
The operation principle of the present embodiment is as follows:
When unloaded, electric current is minimum, and along with underloading and heavily loaded current sampling improve automatically, full load reaches peak load.When mains terminals adds voltage, the voltage that signal amplification circuit U2 detects three-phase current sample circuit U1 is high, the signal of a booster tension of output is given and is triggered and power output control circuit U3, make triggering and power output control circuit U3 control thyristor VT3 output voltage the highest, guarantee direct-on-line starting.
At three phase electric machine M during in zero load or underloading, three-phase current sampling on three phase electric machine M input line is low, sampled signal output is low, through signal, be amplified to and trigger and power output control circuit U3, makes to trigger and the thyristor VT3 part conducting of power output control circuit U3, reduces voltage and current.
At three phase electric machine M during in heavy duty, three-phase current sampling on three phase electric machine M input line is high, sampled signal output is high, through signal, be amplified to and trigger and power output control circuit U3, make the complete conducting of thyristor VT3 of triggering and power output control circuit U3, realize the full conducting of heavily loaded thyristor, zero load or the conducting of underloading part, reduce voltage and current, realizes economize on electricity.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. an electricity saving device of full automatic three-phase motor, is characterized in that: comprise successively connected three-phase current sample circuit (U1), signal amplification circuit (U2), triggering and power output control circuit (U3); Described three-phase current sample circuit (U1) input is connected with three phase mains, and thyristor (VT3) end of described triggering and power output control circuit (U3) is connected with three phase electric machine (M); Also comprise the power supply circuits (U4) that are connected in three-phase circuit, described power supply circuits (U4) are connected with described signal amplification circuit (U2).
2. electricity saving device of full automatic three-phase motor according to claim 1, it is characterized in that: described signal amplification circuit (U2) comprises anti-phase compute chip (ICIA) and homophase compute chip (ICIB), described anti-phase compute chip (ICIA) output by diode (D1) and described homophase compute chip (ICIB) in the same way input be connected.
3. electricity saving device of full automatic three-phase motor according to claim 1, it is characterized in that: described triggering and power output control circuit (U3) comprise the sub-circuits for triggering (U3-0) that are respectively used to control each phase, described sub-circuits for triggering (U3-0) comprise optocoupler (VT1), triode (VT2), bridge rectifier (D2), thyristor (VT3), the output of described signal amplification circuit (U2) is connected with described optocoupler (VT1) input respectively through current-limiting resistance (R1), one road output head grounding of optocoupler (VT1), another road output is connected with described triode (VT2) base stage through resistance (R2), described triode (VT2) collector electrode is connected with bridge rectifier (D2) input with emitter, an output of described bridge rectifier (D2) is respectively by diac (DZ), electric capacity (C) is connected with described thyristor (VT3).
4. electricity saving device of full automatic three-phase motor according to claim 3, it is characterized in that: described thyristor (VT3) two ends are provided with operating state LED indicating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310384196.4A CN103490701A (en) | 2013-08-29 | 2013-08-29 | Fully automatic three-phase motor power saver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310384196.4A CN103490701A (en) | 2013-08-29 | 2013-08-29 | Fully automatic three-phase motor power saver |
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| CN103490701A true CN103490701A (en) | 2014-01-01 |
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| CN201310384196.4A Pending CN103490701A (en) | 2013-08-29 | 2013-08-29 | Fully automatic three-phase motor power saver |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960163A (en) * | 2006-10-08 | 2007-05-09 | 鹤山市多普乐高新节电技术有限公司 | Electricity saving device of full automatic three-phase motor |
| CN200959586Y (en) * | 2006-10-01 | 2007-10-10 | 鹤山市多普乐高新节电技术有限公司 | Electricity economizer of automatic three-phase motor |
| CN201450312U (en) * | 2009-08-21 | 2010-05-05 | 佛山市烨盛电子科技有限公司 | Full-automatic three-phase motor energy saver with protection function |
| CN201750396U (en) * | 2010-07-29 | 2011-02-16 | 宋扬 | Intelligent three-phase motor power saver |
-
2013
- 2013-08-29 CN CN201310384196.4A patent/CN103490701A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200959586Y (en) * | 2006-10-01 | 2007-10-10 | 鹤山市多普乐高新节电技术有限公司 | Electricity economizer of automatic three-phase motor |
| CN1960163A (en) * | 2006-10-08 | 2007-05-09 | 鹤山市多普乐高新节电技术有限公司 | Electricity saving device of full automatic three-phase motor |
| CN201450312U (en) * | 2009-08-21 | 2010-05-05 | 佛山市烨盛电子科技有限公司 | Full-automatic three-phase motor energy saver with protection function |
| CN201750396U (en) * | 2010-07-29 | 2011-02-16 | 宋扬 | Intelligent three-phase motor power saver |
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Application publication date: 20140101 |