CN104943109B - Injection (mo(u)lding) machine - Google Patents
Injection (mo(u)lding) machine Download PDFInfo
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- CN104943109B CN104943109B CN201510084337.XA CN201510084337A CN104943109B CN 104943109 B CN104943109 B CN 104943109B CN 201510084337 A CN201510084337 A CN 201510084337A CN 104943109 B CN104943109 B CN 104943109B
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- mentioned
- regenerated
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- regeneration
- injection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
Present invention offer is a kind of can to suppress the injection (mo(u)lding) machine of the stopping of motor because of caused by the overload exception of regeneration converter.The injection (mo(u)lding) machine possesses：Motor；The drive circuit of the motor；Regeneration converter, is converted to alternating current by the regenerated electric power from the drive circuit and supplies to power supply；And controller, the regeneration converter is controlled, the controller monitors the regenerated load of above-mentioned regeneration converter, exceed threshold time limit system from above-mentioned regeneration converter to the output of above-mentioned power supply in above-mentioned regenerated load.
Description
Technical field
The application advocates the priority based on Japanese patent application filed in 31 days March in 2014 the 2014-074525th.
The full content that it is applied is by reference to being applied in this specification.
The present invention relates to injection (mo(u)lding) machine.
Background technology
Injection (mo(u)lding) machine has：Carry out the mold closing, matched moulds, the mold closing mechanism of die sinking of die device；Filled out into die device
Fill the injection device of moulding material；And the liftout attachment for releasing products formed from die device etc..Mold closing mechanism, injection dress
Put, liftout attachment has motor.
Injection (mo(u)lding) machine, which possesses, to be converted to the converter apparatus of direct current by the alternating current from power supply, will come from converter
The direct current of device is converted to alternating current and is supplied to the DC-to-AC converter of various motors and connects converter apparatus and inverter
The DC links of device.
Converter apparatus is supplied to the regeneration of power supply by the regenerated electric power from DC-to-AC converter is converted into alternating current
Converter etc. is constituted (referring for example to patent document 1).It can reclaim and recycle regenerated electric power, and the energy of motor can be improved
Efficiency.
Patent document 1：Japanese Unexamined Patent Publication 2013-027987 publications
In the past, during the regenerated load overrate of regeneration converter, motor is stopped as overload exception.
The content of the invention
The present invention be in view of above-mentioned problem and make, its object is to provide a kind of can suppress because of regeneration converter
The injection (mo(u)lding) machine of the stopping of motor caused by overload exception.
In order to solve above-mentioned problem, according to an embodiment of the present invention there is provided a kind of injection (mo(u)lding) machine, possess：
Motor；
The drive circuit of the motor；
Regeneration converter, is converted to alternating current by the regenerated electric power from the drive circuit and supplies to power supply；And
Controller, controls the regeneration converter,
The controller monitors the regenerated load of above-mentioned regeneration converter, exceedes threshold time limit system from upper in above-mentioned regenerated load
Regeneration converter is stated to the output of above-mentioned power supply.
The effect of invention：
According to an embodiment of the present invention, using the teaching of the invention it is possible to provide a kind of to suppress because of the overload of regeneration converter exception
The injection (mo(u)lding) machine that caused motor stops.
Brief description of the drawings
Fig. 1 is the figure of the circuit for the injection (mo(u)lding) machine for representing one embodiment of the present invention.
Fig. 2 is the flow chart of the processing for the controller for representing one embodiment of the present invention.
Symbol description
10 motors
20 DC-to-AC converters
30 DC links
31 direct current supply lines
35 capacitors
37 regeneration resistance
38 controlling switches
40 converter apparatus
41 the 1st power conversion units
42 the 2nd power conversion units
80 controllers
Embodiment
Hereinafter, the mode for implementing the present invention is illustrated referring to the drawings, in the drawings, for identical or correspondingly
Structure assign identical or corresponding symbol and omit the description.
Fig. 1 is the figure of the circuit for the injection (mo(u)lding) machine for representing one embodiment of the present invention.Injection (mo(u)lding) machine possesses motor
10th, as the DC-to-AC converter 20 of drive circuit, DC links 30, regeneration resistance 37, controlling switch 38, converter apparatus 40 and
Controller 80 etc..
Motor 10 can be any one in matched moulds motor, injection motor, measure motor, ejection motor etc..Matched moulds horse
Retreated up to making movable pressure plate be relatively fixed pressing plate, and carry out the mold closing, matched moulds, die sinking of die device.Die device is for example by fixed
Mould and dynamic model are constituted, and cover half is arranged on the face opposed with movable pressure plate in fixation clip, and dynamic model is arranged in movable pressure plate
The face opposed with fixation clip on.Injection motor by make to be disposed in the screw rod in heating cylinder advance, by front of screw rod into
Section bar material is projected and is filled into die device from heating cylinder.Measure motor by make to be disposed in the screw rod in heating cylinder rotation and
Moulding material is conveyed forwards along the spiral helicine groove formed on screw rod, and moulding material is accumulated in front of screw rod.Plus
Screw rod can be replaced in hot cylinder and plunger is arranged, motor 10 can make plunger retreat.Ejection motor by make knock-pin retreat and
The movable member in die device is retreated, products formed is ejected from die device.The number of motor 10 is one in Fig. 1,
Can be multiple.
In addition, when the number of motor 10 is multiple, can set multiple by DC-to-AC converter 20, DC links 30, converter
The power conversion unit that device 40 is constituted, can also only set one, and multiple motors 10 are in parallel.
DC-to-AC converter 20 by the direct current from DC links 30 or converter apparatus 40 be converted to alternating current and supply to
Motor 10.DC-to-AC converter 20 is for example with three legs being made up of two switch elements (leg).In addition, the number of leg does not have
Especially limitation.As the concrete example of switch element, for example, it can enumerate MOSFET (Metal Oxide Semiconductor
Filed-EffectTransistor), IGBT (Insulated Gate Bipolar Transistor), bipolar transistor etc..
Relatively each switch element anti-parallel connection has diode.Diode can be built in each switch element.Motor 10 is produced again when slowing down
Raw electric power is supplied to converter apparatus 40 or DC links 30 via diode.
DC links 30 include two direct current supply lines 31 and capacitor 35.Two connection inverter dresses of direct current supply line 31
Put 20 and converter apparatus 40.Each direct current supply line 31 is branched off into direct current supply line 31-1 and direct current supply line 31- in branch point
2.A piece direct current supply line 31-1 is connected with the 1st power conversion unit 41 set on converter apparatus 40, another direct current
Source line 31-2 is connected with the 2nd power conversion unit 42 set on converter apparatus 40.Capacitor 35 makes two direct current supply lines
DC voltage (hereinafter referred to as " DC link voltages ") smoothing between 31.
Regeneration resistance 37 consumes the regenerated electric power from DC-to-AC converter 20.The control of controlling switch 38 regenerates the dynamic of resistance 37
Make.Regeneration resistance 37 and controlling switch 38 are connected in series, and relative capacitor 35 is connected in parallel.Controlling switch 38 is by switching member
Part etc. is constituted.When controlling switch 38 is opened, electric current flows to regeneration resistance 37, and regenerated electric power is converted into heat and is consumed.Control
When switch 38 is closed, not streaming current in regeneration resistance 37, regenerated electric power is accumulated into capacitor 35.
Converter apparatus 40 has the 1st power conversion unit 41 and the 2nd power conversion unit 42 in parallel.1st electrical power conversion
Alternating current from power supply 12 is converted to direct current and is supplied to DC-to-AC converter 20 or DC links 30 by portion 41.1st electric power turns
Change for example, three-phase bridge circuit of portion 41, including six diodes.
Regenerated electric power from DC-to-AC converter 20 is converted to alternating current and supplied to power supply by the 2nd power conversion unit 42
12.2nd power conversion unit 42 is for example with three legs being made up of two switch elements.In addition, the number of leg is not limited especially
System.Relatively each switch element anti-parallel connection has diode.Diode can be built in each switch element.2nd power conversion unit 42
Equivalent to regeneration converter described in technical scheme.
2nd power conversion unit 42 is due to including six diodes same with the 1st power conversion unit 41, therefore, it is possible in the future
Direct current is converted to from the alternating current of power supply 12, and is supplied to DC-to-AC converter 20 or DC links 30.
In addition, the converter apparatus 40 of present embodiment is by the 1st power conversion unit 41 being connected in parallel and the 2nd electrical power conversion
Portion 42 is constituted, but only can also be made up of the 2nd power conversion unit 42, and the structure is not particularly limited.
AC power cord 61 connects power supply 12 and converter apparatus 40.Each AC power cord 61 is branched conclusion of the business in branch point
Flow power line 61-1 and AC power cord 61-2.A piece AC power cord 61-1 is connected with the 1st power conversion unit 41, another friendship
Stream power line 61-2 is connected with the 2nd power conversion unit 42.
Controller 80 has storage part and the CPU (Central Processing Unit) such as memory, by by CPU
Execution is stored in the control program in storage part to control converter apparatus 40, DC-to-AC converter 20.
Controller 80 is generated for carrying out PWM (Pulse Width Modulation：Pulse width modulation) control PWM
Signal, and export to DC-to-AC converter 20.Each switch element of DC-to-AC converter 20 enters according to the pwm signal from controller 80
Row switch, and drive motor 10.
When motor 10 slows down, regenerated electric power is generated by the induced electromotive force of motor 10.Regenerated electric power is filled via inverter
Put 20 and be supplied to DC links 30 etc., and charge to capacitor 35.As a result, DC link voltages rise.On the other hand, in motor 10
When during acceleration or at the uniform velocity, if capacitor 35 discharges, DC link voltages decline.DC link voltages can be examined by voltage detector 36
Survey.Voltage detector 36 will represent the signal output of DC link voltages to controller 80.
Controller 80 monitors DC link voltages, when DC link voltages are more than 1 threshold value, the control letter such as generation pwm signal
Number, and export to the 2nd power conversion unit 42.Each switch element of 2nd power conversion unit 42 is according to the control from controller 80
Signal is switched, and regenerated electric power is converted into alternating current and power supply 12 is supplied to.It can reclaim and recycle regenerated electric power,
And the energy efficiency of motor 10 can be improved.Further, it is possible to the overcurrent of suppression capacitor 35, and it is capable of suppression capacitor 35
Damage.The capacitor 35 by power supply regenerative discharge and DC link voltages be the 2nd threshold value (the 2nd threshold value≤the 1st threshold value) below
When, controller 80 stops the regeneration actions of the 2nd power conversion unit 42, and the electric discharge of stopping capacitor 35.
In addition, the control of the 2nd power conversion unit 42 can not be PWM controls, such as can be 120 ° of power controls.
Fig. 2 is the flow chart of the processing for the controller for representing one embodiment of the present invention.In Fig. 2 step S12, control
Device 80 monitors the regenerated load I of the 2nd power conversion unit 42.The regenerated load I of 2nd power conversion unit 42 can be by electric from the 2nd
The electric current that power converter section 42 is exported to power supply 12 is represented, and is monitored by current detector 88.Current detector 88 detects each phase
AC power cord 61-2 electric current, and by represent the electric current signal exported to controller 80.
In addition, the current detector 88 of present embodiment detects the AC power cord 61-2 of each phase electric current, but it is also possible to
Detect AC power cord 61-2 more than 1 phase electric current.Also, current detector 88 can detect direct current supply line 31-2 electricity
Stream.Any occasion can monitor the regenerated load I of the 2nd power conversion unit 42.
In step S14, controller 80 checks whether regenerated load I exceedes threshold value I0.Regenerated load I can pass through electric current
Virtual value represent that threshold value I0 can be rated value.Current cycle changes, and passage time function f (t) is represented.Electric current
Virtual value is, the value after function f (t) squares is integrated in cycle T, and be worth obtained from its integrated value F is removed with cycle T it is flat
Root.Cycle T is molding cycle time.Rated value be continuity constant regeneration action when the 2nd power conversion unit 42 temperature
For the higher limit below allowable temperature.Virtual value can be calculated with the ratio of relative rated value, and the ratio is expressed as a percentage
Can be with.In addition, threshold value can be set as it is also lower than rated value.
When regenerated load I is below threshold value I0, (step S14 "No"), controller 80 returns to step S12 and persistently entered
Processing later row step S12.On the other hand, ("Yes" in step S14), controller 80 when regenerated load I exceedes threshold value I0
Limit the output (step S16) from the 2nd power conversion unit 42 to power supply 12.
For example, by making the virtual value from the 2nd power conversion unit 42 to the electric current of power supply 12 compared to regenerated load more than threshold value
When reduction etc. realize export-restriction.Export-restriction includes output and stopped.It is by making the 2nd power conversion unit 42 that output, which stops,
Each switch element is closed and (is referred to as servo to close) come what is carried out.
Descending through for current effective value declines current peak, shortens the time of electric current flowing or carry out both
Etc. realizing.Controller 80 can intermittently carry out the regeneration of the 2nd power conversion unit 42 to shorten the time of electric current flowing
Action.
The decline of current effective value also can be by adding the stand-by time of motor 10 and extending molding cycle time come real
It is existing.Controller 80 may determine that the shaping for making a reservation for injection number in the case of extension molding cycle time, in the scheduled time whether may be used
Energy.When the shaping for making a reservation for injection number in the scheduled time is not over, controller 80 can adjust stand-by time.
According to present embodiment, when regenerated load I exceedes threshold value I0, controller 80 limit from the 2nd power conversion unit 42 to
The output of power supply 12.Therefore, it is possible to suppress to stop because of caused by the overload exception of the 2nd power conversion unit 42.
Then, controller 80 controls controlling switch 38 regeneration resistance 37 is worked (step S18).Electric current flows through regeneration electricity
Resistance 37, regenerated electric power is converted into heat and is consumed.Therefore, it is possible to suppress because limiting from the 2nd power conversion unit 42 to power supply 12
Output caused by DC link voltages rising.
Regeneration resistance 37 can consume regenerated electric power when DC link voltages are more than 3 threshold value.Because of regeneration resistance 37
Power consumption and capacitor 35 discharge, DC link voltages be the 4th threshold value (the 4th threshold value≤the 3rd threshold value) below when, controller 80 makes
The power consumption for regenerating resistance 37 stops.
In addition, which is first carried out for the work (step S18) and export-restriction (step S16) of regeneration resistance 37, also may be used
To carry out simultaneously.
Then, controller 80 stops motor 10 (step S20) after predetermined condition establishment, and stops to be manufactured repeatedly
The periodic duty of product, terminates this processing.
As the stop condition of motor 10, for example, it can enumerate the process of injection (mo(u)lding) machine and terminate or note for die sinking process
The process of forming machine is penetrated for ejection process to terminate.The state of injection (mo(u)lding) machine turns into and circular flow at the end of these processes
At the end of roughly the same state, therefore there's almost no the harmful effect of circular flow termination.
In addition, the rated value of regeneration resistance 37, which is more than, is based on regeneration because of the limitation of power supply regenerative in remaining regenerated electric power
During the electric power consumption of resistance 37, can without motor 10 stopping (step S20), can be run with persistent loop.
More than, embodiment of injection (mo(u)lding) machine etc. is illustrated, but the present invention is not limited to above-mentioned embodiment
Deng, technical scheme record spirit of the invention in the range of can carry out various modifications and improvement.
For example in above-mentioned embodiment, the remaining regenerated electric power because of the limitation of power supply regenerative is disappeared by regenerating resistance 37
Consumption, but can also be accumulated in other capacitors (hereinafter referred to as " reaction condenser ") different from capacitor 35.Regeneration electricity
Container is controlled with regenerating resistance 37 it is also possible to be connected in parallel with capacitor 35 by controlling switch.Reaction condenser will
The power supply of accumulation is to DC-to-AC converter 20.Can also be simultaneously using reaction condenser and regeneration resistance 37.
Claims (7)
1. a kind of injection (mo(u)lding) machine,
Possess：
Motor；
The drive circuit of the motor；
Regeneration converter, is converted to alternating current by the regenerated electric power from the drive circuit and supplies to power supply；
Controller, controls the regeneration converter；And
Resistance is regenerated, the regenerated electric power from above-mentioned drive circuit is consumed,
The controller monitors the regenerated load of above-mentioned regeneration converter, above-mentioned regenerated load exceed threshold time limit system from it is above-mentioned again
Raw output of the converter to above-mentioned power supply, by above-mentioned regeneration resistance consumption because limiting from above-mentioned regeneration converter to above-mentioned power supply
Output and remaining regenerated electric power.
2. injection (mo(u)lding) machine as claimed in claim 1,
Controller noted above makes above-mentioned regeneration resistance performance when above-mentioned regenerated load exceedes threshold value.
3. injection (mo(u)lding) machine as claimed in claim 1 or 2,
Have：
DC links, connect above-mentioned drive circuit and above-mentioned regeneration converter,
Controller noted above makes above-mentioned regeneration resistance performance when the voltage of above-mentioned DC links exceedes threshold value.
4. a kind of injection (mo(u)lding) machine,
Possess：
Motor；
The drive circuit of the motor；
Regeneration converter, is converted to alternating current by the regenerated electric power from the drive circuit and supplies to power supply；
Controller, controls the regeneration converter；And
Reaction condenser, accumulates the regenerated electric power from above-mentioned drive circuit,
The controller monitors the regenerated load of above-mentioned regeneration converter, above-mentioned regenerated load exceed threshold time limit system from it is above-mentioned again
Raw output of the converter to above-mentioned power supply, makes because limiting from above-mentioned regeneration converter to the output of above-mentioned power supply and remaining regeneration
Above-mentioned reaction condenser is arrived in electric power accumulation.
5. injection (mo(u)lding) machine as claimed in claim 4,
Controller noted above makes above-mentioned reaction condenser work when above-mentioned regenerated load exceedes threshold value.
6. the injection (mo(u)lding) machine as described in claim 4 or 5,
Have：DC links, connect above-mentioned drive circuit and above-mentioned regeneration converter,
Controller noted above makes above-mentioned reaction condenser work when the voltage of above-mentioned DC links exceedes threshold value.
7. the injection (mo(u)lding) machine as described in claim 1 or 4,
Controller noted above stops the motor when above-mentioned regenerated load exceedes threshold value after predetermined condition establishment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-074525 | 2014-03-31 | ||
| JP2014074525A JP6234869B2 (en) | 2014-03-31 | 2014-03-31 | Injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104943109A CN104943109A (en) | 2015-09-30 |
| CN104943109B true CN104943109B (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510084337.XA Active CN104943109B (en) | 2014-03-31 | 2015-02-16 | Injection (mo(u)lding) machine |
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| Country | Link |
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| JP (1) | JP6234869B2 (en) |
| CN (1) | CN104943109B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534402B (en) * | 2016-04-22 | 2019-01-18 | 三菱电机株式会社 | PN bus sharing system, regenerating control device and method for controlling reproduction |
| JP2017217834A (en) * | 2016-06-08 | 2017-12-14 | 株式会社日本製鋼所 | Motor-driven injection molding machine provided with plural power feed systems |
| DE102018115295A1 (en) * | 2018-06-26 | 2020-01-02 | Valeo Siemens Eautomotive Germany Gmbh | Control device and method for discharging an intermediate circuit capacitor, converter and vehicle |
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| JPS61231883A (en) * | 1985-04-08 | 1986-10-16 | Toshiba Corp | Crane controller |
| JPS6226192U (en) * | 1985-07-31 | 1987-02-17 | ||
| JPS62126089A (en) * | 1985-11-27 | 1987-06-08 | 株式会社日立製作所 | Controller for alternating current elevator |
| JPH05227759A (en) * | 1992-02-14 | 1993-09-03 | Mitsubishi Electric Corp | Power regenerating unit |
| JPH06319292A (en) * | 1993-04-28 | 1994-11-15 | Yaskawa Electric Corp | Load drive equipment and drive method |
| JP3708728B2 (en) * | 1998-11-05 | 2005-10-19 | 日創電機株式会社 | Motor drive device for injection molding machine |
| JP3451480B2 (en) * | 2000-02-22 | 2003-09-29 | 住友重機械工業株式会社 | Injection molding machine |
| JP2002331559A (en) * | 2001-05-09 | 2002-11-19 | Toshiba Mach Co Ltd | Control device and control method for molding machine |
| JP4074497B2 (en) * | 2001-10-19 | 2008-04-09 | 住友重機械工業株式会社 | Injection molding machine and method for protecting the injection molding machine |
| JP2004154961A (en) * | 2002-11-01 | 2004-06-03 | Toshiba Mach Co Ltd | Drive control device of electromotive injection molding machine having regenerative function |
| JP4735076B2 (en) * | 2005-06-27 | 2011-07-27 | 日産自動車株式会社 | Motor control device |
| JP4627250B2 (en) * | 2005-11-14 | 2011-02-09 | 住友重機械工業株式会社 | Control method of injection molding machine |
| JP2008245426A (en) * | 2007-03-27 | 2008-10-09 | Toyota Motor Corp | Controller and control method of motor |
| JP5166389B2 (en) * | 2009-11-04 | 2013-03-21 | 山洋電気株式会社 | Motor drive power supply and regeneration method using the power supply |
| JP5762869B2 (en) * | 2011-07-26 | 2015-08-12 | 住友重機械工業株式会社 | Injection molding machine |
| JP5801128B2 (en) * | 2011-07-26 | 2015-10-28 | 住友重機械工業株式会社 | Injection molding machine |
| JP5811035B2 (en) * | 2012-05-29 | 2015-11-11 | 宇部興産機械株式会社 | Electric injection molding machine load status display method and electric injection molding machine drive device |
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2014
- 2014-03-31 JP JP2014074525A patent/JP6234869B2/en active Active
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2015
- 2015-02-16 CN CN201510084337.XA patent/CN104943109B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP6234869B2 (en) | 2017-11-22 |
| CN104943109A (en) | 2015-09-30 |
| JP2015196293A (en) | 2015-11-09 |
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