CN101977018A - Frequency-conversion power saver for three-phase bender - Google Patents
Frequency-conversion power saver for three-phase bender Download PDFInfo
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- CN101977018A CN101977018A CN2010105193375A CN201010519337A CN101977018A CN 101977018 A CN101977018 A CN 101977018A CN 2010105193375 A CN2010105193375 A CN 2010105193375A CN 201010519337 A CN201010519337 A CN 201010519337A CN 101977018 A CN101977018 A CN 101977018A
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Abstract
The invention discloses a frequency-conversion power saver for a three-phase bender, which belongs to the technical field of motor energy conservation control. The frequency-conversion power saver comprises a bender operation parameter detection circuit (10), a three-phase rectifying circuit (20), a charging circuit (30), a battery (40), a battery switch (50), a three-phase inverter (60), a capacitor (70), a control circuit (80) and a three-phase power contactor (90). When the frequency-conversion power saver for the three-phase bender is applied to a bender with an alternating current (AC) motor, two energy saving methods for speed regulation and energy conservation and for power grid peak clipping and valley filling can be realized respectively, and power can be saved by 20 to 90% generally. The frequency-conversion power saver for the three-phase bender has simple structure, ensures visual metering and obvious power saving effect and has wide application prospect in terms of energy conservation of the bender.
Description
Technical field
The present invention relates to three-phase bender frequency-variable energy-saving device, belong to energy saving motor control technology field, be specifically related to a kind of variable speed energy saving and these two kinds of power control units that power-economizing method economizes on electricity of electrical network peak load shifting realized simultaneously.Be applicable on the bender that has three-phase alternating-current motor.
Background technology
Along with progress, the development of science and technology of society, the three-phase alternating-current motor bender has become a kind of being seen everywhere, the common universal electromechanical equipment that is used on a large scale.The power consumption of the three-phase alternating-current motor bender electric energy energy consumption in the whole nation has relatively occupied suitable ratio.
The positive growing tension of 21 century global energy, China is again energy resource consumption big country, energy-conservation economize on electricity is imperative.
Therefore, it is necessary bender being carried out power-saving Retrofit.
At present, a lot of occasions are arranged, the three-phase alternating-current motor bender does not adopt power-saving technology that it is carried out reducing energy consumption, or only just frequency converter has been installed simply its speed fixedly is reduced to certain value and does not carry out dynamic adjustments.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned waste of energy of the prior art, provide a kind of simple and practical, cost is lower, can fully automatic operation, the significant three-phase bender of power savings frequency-variable energy-saving device.
In order to realize that the foregoing invention purpose adopts following technical scheme:
Three-phase bender frequency-variable energy-saving device of the present invention comprises bender operational parameter detection circuit (10), rectified three-phase circuit (20), charging circuit (30), battery (40), cell switch (50), three-phase inverter (60), capacitor (70), control circuit (80), three phase mains contactor (90).The external electrical network three phase mains inserts the input of three phase mains contactor (90), the output of three phase mains contactor (90) respectively with the input of rectified three-phase circuit (20), the input of charging circuit (30) connects, the output of rectified three-phase circuit (20) respectively with the input of cell switch (50), three-phase inverter (60) input is connected, the output of cell switch (50) respectively with the output of charging circuit (30), battery (40) is connected, the dc terminal of three-phase inverter (60) is connected with capacitor (70), control circuit (80) respectively with bender operational parameter detection circuit (10), the control end of rectified three-phase circuit (20), the control end of charging circuit (30), the control end of cell switch (50), the control end of three-phase inverter (60), the control end of three phase mains contactor (90) is connected, the output of three-phase inverter (60) is connected with the bender alternating current motor, and bender operational parameter detection circuit (10) is connected with transducer on being installed on bender.
Adopted the three-phase bender frequency-variable energy-saving device of this invention, can realize simultaneously that the dynamic speed adjustment of bender is energy-conservation and the electrical network peak load shifting is carried out these two kinds of power-economizing methods of electric power storage energy storage to economize on electricity.When this battery saving arrangement is applied on the bender of not making similar power-saving Retrofit, generally can obtain 20%～90% power savings, electricity-saving appliance of the present invention does not influence the use of bender operate as normal simultaneously, simple installation, possess good economic benefit and social benefit, and simple and practical, and cost is lower, can fully automatic operation, power savings is remarkable.Be with a wide range of applications aspect energy-conservation at bender.
Description of drawings
Accompanying drawing is the operation principle block diagram of three-phase bender frequency-variable energy-saving device of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
Consult shown in the accompanying drawing, with the bender that is applied to 380V, a 50HZ, 3 phases, 15KW is reference, this three-phase bender frequency-variable energy-saving device comprises bender operational parameter detection circuit (10), rectified three-phase circuit (20), charging circuit (30), battery (40), cell switch (50), three-phase inverter (60), capacitor (70), control circuit (80), three phase mains contactor (90).The external electrical network three phase mains inserts the input of three phase mains contactor (90), the output of three phase mains contactor (90) respectively with the input of rectified three-phase circuit (20), the input of charging circuit (30) connects, the output of rectified three-phase circuit (20) respectively with the input of cell switch (50), three-phase inverter (60) input is connected, the output of cell switch (50) respectively with the output of charging circuit (30), battery (40) is connected, the dc terminal of three-phase inverter (60) is connected with capacitor (70), control circuit (80) respectively with bender operational parameter detection circuit (10), the control end of rectified three-phase circuit (20), the control end of charging circuit (30), the control end of cell switch (50), the control end of three-phase inverter (60), the control end of three phase mains contactor (90) is connected, the output of three-phase inverter (60) is connected with the bender alternating current motor, and bender operational parameter detection circuit (10) is connected with transducer on being installed on bender.
Simultaneously, the power device that is comprised in the three-phase inverter (60) in this three-phase bender frequency-variable energy-saving device can be V-type groove metal-oxide-semiconductor field effect transistor (VMOS), igbt (IGBT), integral gate change transistor (IGCT), smart power switch device and drive circuit integration module (IPM) or intelligent power integrated circuit (SPIC).
The 380V50HZ power supply is linked into charging circuit (30) and rectified three-phase circuit (20) through three phase mains contactor (90), when electricity price electricity price at a low ebb at 22 (being generally in evening to point on daytimes 8), charging circuit (30) puts into operation, charge for battery (40), cell switch this moment (50) disconnects.Civil power becomes direct current by rectified three-phase circuit (20), through three-phase inverter (60) direct current is converted into the alternating current of frequency adjustable, and this alternating current is sent to bender, the different speed of the corresponding bender of different frequencies.Control circuit (80) receives the feedback signal of bender operational parameter detection circuit (10) in real time, and through after the computing, to three-phase inverter (60), the corresponding frequency of three-phase inverter (60) output arrives the bender motor with the output speed signal.The bender motor speed descends, and will cause the bender energy consumption to decline to a great extent.
When electricity price is in peak when electricity (be generally daytime to point in evenings 22) at 8, charging circuit (30) automatic disconnection, carry out direct current supply for three-phase inverter (60) by battery (40) by cell switch (50), at this moment, rectified three-phase circuit (20) automatic disconnection, the direct current that battery (40) provides is converted into the alternating current of frequency adjustable through three-phase inverter (60) with direct current, and this alternating current is sent to bender, the different speed of the corresponding bender of different frequencies.Control circuit (80) receives the feedback signal of bender operational parameter detection circuit (10) in real time, and through after the computing, to three-phase inverter (60), the corresponding frequency of three-phase inverter (60) output arrives the bender motor with the output speed signal.The bender motor speed descends, and will cause the bender energy consumption to decline to a great extent.
For the bender of this 380V, 50HZ, 3 phases, 15KW, motor speed can be regulated according to bender operational parameter detection circuit (10), and energy consumption can significantly reduce.Because electric power low ebb electricity price is cheap more a lot of than peak electricity tariff, when being in electric power low ebb electricity price, three-phase bender frequency-variable energy-saving device of the present invention can be to battery (40) charging accumulation of energy simultaneously; When being in the electric power peak electricity tariff, three-phase bender frequency-variable energy-saving device of the present invention can discharge so that the peak electricity consumption has been avoided in the bender normal operation from battery (40), and the actual electricity charge wholesale of paying is reduced.
Adopted the three-phase bender frequency-variable energy-saving device of this invention, can realize simultaneously that the dynamic speed adjustment of bender is energy-conservation and the electrical network peak load shifting is carried out these two kinds of power-economizing methods of electric power storage energy storage to economize on electricity.When this battery saving arrangement is applied on the bender of not making similar power-saving Retrofit, generally can obtain 20%～90% power savings, electricity-saving appliance of the present invention does not influence the use of bender operate as normal simultaneously, simple installation, possess good economic benefit and social benefit, and simple and practical, and cost is lower, can fully automatic operation, power savings is remarkable.Be with a wide range of applications aspect energy-conservation at bender.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (2)
1. a three-phase bender frequency-variable energy-saving device comprises bender operational parameter detection circuit (10), rectified three-phase circuit (20), charging circuit (30), battery (40), cell switch (50), three-phase inverter (60), capacitor (70), control circuit (80), three phase mains contactor (90).The external electrical network three phase mains inserts the input of three phase mains contactor (90), the output of three phase mains contactor (90) respectively with the input of rectified three-phase circuit (20), the input of charging circuit (30) connects, the output of rectified three-phase circuit (20) respectively with the input of cell switch (50), three-phase inverter (60) input is connected, the output of cell switch (50) respectively with the output of charging circuit (30), battery (40) is connected, the dc terminal of three-phase inverter (60) is connected with capacitor (70), control circuit (80) respectively with bender operational parameter detection circuit (10), the control end of rectified three-phase circuit (20), the control end of charging circuit (30), the control end of cell switch (50), the control end of three-phase inverter (60), the control end of three phase mains contactor (90) is connected, the output of three-phase inverter (60) is connected with the bender alternating current motor, and bender operational parameter detection circuit (10) is connected with transducer on being installed on bender.
2. three-phase bender frequency-variable energy-saving device according to claim 1 is characterized in that: the power device in the described three-phase inverter (60) is V-type groove metal-oxide-semiconductor field effect transistor (VMOS), igbt (IGBT), integral gate change transistor (IGCT), smart power switch device and drive circuit integration module (IPM) or intelligent power integrated circuit (SPIC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105193375A CN101977018A (en) | 2010-10-25 | 2010-10-25 | Frequency-conversion power saver for three-phase bender |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105193375A CN101977018A (en) | 2010-10-25 | 2010-10-25 | Frequency-conversion power saver for three-phase bender |
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| Publication Number | Publication Date |
|---|---|
| CN101977018A true CN101977018A (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105193375A Pending CN101977018A (en) | 2010-10-25 | 2010-10-25 | Frequency-conversion power saver for three-phase bender |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387810A (en) * | 2018-02-11 | 2018-08-10 | 广州金升阳科技有限公司 | A kind of contactor electricity-saving appliance detection circuit |
-
2010
- 2010-10-25 CN CN2010105193375A patent/CN101977018A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387810A (en) * | 2018-02-11 | 2018-08-10 | 广州金升阳科技有限公司 | A kind of contactor electricity-saving appliance detection circuit |
| CN108387810B (en) * | 2018-02-11 | 2024-02-20 | 广州金升阳科技有限公司 | Contactor electricity-saving appliance detection circuit |
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Application publication date: 20110216 |