CN102013871A - Frequency variable electricity saver for three-phase injection molding machine - Google Patents
Frequency variable electricity saver for three-phase injection molding machine Download PDFInfo
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- CN102013871A CN102013871A CN2010105193271A CN201010519327A CN102013871A CN 102013871 A CN102013871 A CN 102013871A CN 2010105193271 A CN2010105193271 A CN 2010105193271A CN 201010519327 A CN201010519327 A CN 201010519327A CN 102013871 A CN102013871 A CN 102013871A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 62
- 230000005611 electricity Effects 0.000 title abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 230000005669 field effect Effects 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The invention discloses a frequency variable electricity saver for a three-phase injection molding machine, belonging to the technical field of motor energy saving control. The frequency variable electricity saver comprises an injection molding machine operation parameter detection circuit (10), a three-phase rectifier 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 supply contactor (90). The frequency variable electricity saver for the three-phase injection molding machine is applied to the injection molding machine with an alternating current motor; two energy-saving methods, namely speed-regulating energy conservation and grid peak reduction and valley filling, can be implemented at the same time respectively; and 20 to 90 percent of electricity saving effect can be acquired generally. The frequency variable electricity saver for the three-phase injection molding machine has the advantages of simple and convenient structure, intuitive measurement, remarkable electricity saving effect and wide application prospects in the aspect of injection molding machine energy conservation.
Description
Technical field
The present invention relates to three-phase injection molding machine 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 injection molding machine 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 injection molding machine 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 injection molding machine 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 injection molding machine being carried out power-saving Retrofit.
At present, a lot of occasions are arranged, the three-phase alternating-current motor injection molding machine 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 injection molding machine of power savings frequency-variable energy-saving device.
In order to realize that the foregoing invention purpose adopts following technical scheme:
Three-phase injection molding machine frequency-variable energy-saving device of the present invention comprises injection molding machine 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 injection molding machine 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 injection molding machine alternating current motor, and injection molding machine operational parameter detection circuit (10) is connected with transducer on being installed on injection molding machine.
Adopted the three-phase injection molding machine frequency-variable energy-saving device of this invention, can realize simultaneously that the dynamic speed adjustment of injection molding machine 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 injection molding machine 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 injection molding machine 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.Aspect injection machine energy-saving, be with a wide range of applications.
Description of drawings
Accompanying drawing is the operation principle block diagram of three-phase injection molding machine 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 injection molding machine that is applied to 380V, a 50HZ, 3 phases, 15KW is reference, this three-phase injection molding machine frequency-variable energy-saving device comprises injection molding machine 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 injection molding machine 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 injection molding machine alternating current motor, and injection molding machine operational parameter detection circuit (10) is connected with transducer on being installed on injection molding machine.
Simultaneously, the power device that is comprised in the three-phase inverter (60) in this three-phase injection molding machine 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 injection molding machine, the different speed of the corresponding injection molding machine of different frequencies.Control circuit (80) receives the feedback signal of injection molding machine 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 injection molding machine motor with the output speed signal.The injection molding machine motor speed descends, and will cause the injection molding machine 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 injection molding machine, the different speed of the corresponding injection molding machine of different frequencies.Control circuit (80) receives the feedback signal of injection molding machine 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 injection molding machine motor with the output speed signal.The injection molding machine motor speed descends, and will cause the injection molding machine energy consumption to decline to a great extent.
For the injection molding machine of this 380V, 50HZ, 3 phases, 15KW, motor speed can be regulated according to injection molding machine 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 injection molding machine 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 injection molding machine frequency-variable energy-saving device of the present invention can discharge so that the peak electricity consumption has been avoided in the injection molding machine normal operation from battery (40), and the actual electricity charge wholesale of paying is reduced.
Adopted the three-phase injection molding machine frequency-variable energy-saving device of this invention, can realize simultaneously that the dynamic speed adjustment of injection molding machine 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 injection molding machine 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 injection molding machine 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.Aspect injection machine energy-saving, be with a wide range of applications.
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 injection molding machine frequency-variable energy-saving device comprises injection molding machine 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 injection molding machine 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 injection molding machine alternating current motor, and injection molding machine operational parameter detection circuit (10) is connected with transducer on being installed on injection molding machine.
2. three-phase injection molding machine 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 |
|---|---|---|---|
| CN2010105193271A CN102013871A (en) | 2010-10-25 | 2010-10-25 | Frequency variable electricity saver for three-phase injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105193271A CN102013871A (en) | 2010-10-25 | 2010-10-25 | Frequency variable electricity saver for three-phase injection molding machine |
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| Publication Number | Publication Date |
|---|---|
| CN102013871A true CN102013871A (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105193271A Pending CN102013871A (en) | 2010-10-25 | 2010-10-25 | Frequency variable electricity saver for three-phase injection molding machine |
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| Country | Link |
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| CN (1) | CN102013871A (en) |
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- 2010-10-25 CN CN2010105193271A patent/CN102013871A/en active Pending
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Application publication date: 20110413 |