CN203765980U - Hydro-electric servo system for injection molding machines - Google Patents
Hydro-electric servo system for injection molding machines Download PDFInfo
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- CN203765980U CN203765980U CN201420086408.0U CN201420086408U CN203765980U CN 203765980 U CN203765980 U CN 203765980U CN 201420086408 U CN201420086408 U CN 201420086408U CN 203765980 U CN203765980 U CN 203765980U
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Abstract
The utility model provides a hydro-electric servo system for injection molding machines. The system comprises a servo driver, a pressure sensor, a rare-earth permanent magnet synchronous servo motor and an oil pump, wherein the servo driver is used for storing preset pressures and preset flow signals in different working stages of an injection molding machine, receiving the oil pump actual pressure signals output by the pressure sensor and outputting control signals according to the difference value of the preset pressures and the actual pressure signals at the same time to control the output torque and the rotating speed of the rare-earth permanent magnet synchronous servo motor so as to control the flow and the pressure of the oil pump. Compared with an ordinary hydraulic system and a variable pump system, the hydro-electric servo system provided by the utility model has the advantages that the electricity can be saved by 60-80% and more than 30% respectively; the hydro-electric servo system is rapid in dynamic response and high in repeat precision.
Description
Technical field
The utility model belongs to technical field of electricity, relates in particular to a kind of injection machine liquid electric servo system.
Background technology
Traditional injection moulding machine generally adopts the constant displacement pump of oil pressure actuated, no matter actual how many with oil pressure flow, oil pump is full-speed operation all, adopts reflux type control flow.But in fact injection machine is different in the requirement of each operation stage flow and pressure, generally, except the action of injection lyosol needs larger pressure, other times all only need very little flow and pressure.Traditional oil hydraulic circuit, by unnecessary oily by-pass oil return case, has not only been wasted power and has also been improved oil temperature.
In prior art, adopt in addition variable pump systems to replace the scheme of traditional constant displacement pump, variable pump systems with respect to common Constant Pump System in effect to some extent aspect economize on electricity, but because the speed of motor and oil pump is constant, system pressure is by pressure-control valve control, so or energy loss of some, and variable pump systems is higher to the requirement of hydraulic oil, operation noise is large.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, has proposed that a kind of rapid dynamic response speed, repeatable accuracy are high, the obvious injection machine of power savings liquid electric servo system.
The purpose of this utility model can realize by following technical proposal: a kind of injection machine liquid electric servo system, comprise servo-driver, pressure sensor, rare-earth permanent-magnetic synchronous servomotor and oil pump, the preset pressure in described servo-driver storage injection machine different operating stage and preset flow signal, receive the oil pump actual pressure signal of being exported by pressure sensor simultaneously, thereby according to the output torque of the difference output control signal control rare-earth permanent-magnetic synchronous servomotor of setting pressure and actual pressure signal and flow and the pressure of rotating speed control oil pump; Wherein, described servo-driver comprises power module, and described power module comprises the input module for input direct voltage; Main winding, metal-oxide-semiconductor, power supply winding with main winding in the same side, with main winding in not multiple output windings, pwm chip, the triode of homonymy; Power supply winding one end ground connection other end is connected to main winding, metal-oxide-semiconductor drain electrode, transistor collector and pwm chip voltage input end; Pwm chip output is connected to metal-oxide-semiconductor base stage, and voltage input end is also connected with transistor emitter; Triode source class access input module; When DC voltage input, the increase of main winding magnetic flux makes to export winding output dc voltage with to other module for power supply of servo-driver, thereby simultaneously triode base emitter-base bandgap grading conducting makes the pwm chip can be by regulating dutycycle to regulate the ON time of metal-oxide-semiconductor maintain the output voltage stabilization of output winding; In the time that DC input voitage reduces or disconnect, inferior winding magnetic flux produces induced-current and supplies with pwm chip and metal-oxide-semiconductor than the power supply winding magnetic flux winding that makes greatly to power, and maintains pwm chip and metal-oxide-semiconductor in working order.
Further, also comprise metal-oxide-semiconductor drain voltage protection module, described metal-oxide-semiconductor drain voltage protection module and main winding are in parallel and connect with metal-oxide-semiconductor; Described metal-oxide-semiconductor drain voltage protection module comprises the first electric capacity, the first Zener diode, multiple the first resistance being connected in series, the first diode; After being connected in parallel, described the first electric capacity, the first Zener diode, the first resistance is connected in series with the first diode; The first Zener diode and the first diode cathode equipotential arrange, and metal-oxide-semiconductor drain electrode is connected with the first diode cathode.
Further, also comprise filtration module, described filtration module is arranged between input module and main winding, described filtration module comprises three parallel branches, the first parallel branch is made up of the second electric capacity, the second parallel branch is made up of the first inductance and the second inductance, and the 3rd parallel branch is made up of the 3rd resistance and the 4th resistance; Wire one end is arranged between the first inductance and the second inductance, and the other end is arranged between the 3rd resistance and the 4th resistance.
Further, in described main winding, the width of single winding wire is 0.3 to 1.5 millimeter, and the gap between winding wire is 0.2-0.5 millimeter.
Use liquid electric servo system of the present utility model, with respect to the common hydraulic system 60%-80% that can economize on electricity, compare variable pump systems and also can economize on electricity more than 30%, and dynamic response is fast, repeatable accuracy is high.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is the circuit theory schematic diagram of power source protective module in servo-driver of the present utility model;
Fig. 3 is the physical circuit schematic diagram of circuit theory schematic diagram described in Fig. 2;
Detailed description of the invention
Please refer to Fig. 1, injection machine of the present utility model liquid electric servo system, comprise servo-driver 1, pressure sensor 2, rare-earth permanent-magnetic synchronous servomotor 3 and oil pump 4, described servo-driver 1 is stored preset pressure and the preset flow signal in injection machine different operating stage, receive the oil pump actual pressure signal of being exported by pressure sensor 2 simultaneously, thereby according to the output torque of the difference output control signal control rare-earth permanent-magnetic synchronous servomotor 3 of setting pressure and actual pressure signal and flow and the pressure of rotating speed control oil pump.
Please refer to Fig. 2; Fig. 2 is the circuit theory schematic diagram of power source protective module in servo-driver of the present utility model; servo-driver power module in Fig. 2, comprise for the input module 10 of input direct voltage, main winding 20, metal-oxide-semiconductor 30, power supply winding 40 with main winding in the same side, with main winding in not multiple output windings 50, pwm chip 60, the triode 70 of homonymy.
Main winding 20 accesses input module 10, and multiple output windings 50 and main winding 20 form transformer, for exporting other modules of servo-driver after input direct voltage transformation to.
Power supply winding 40 with main winding 20 in the same side, power supply winding 40 one end ground connection, the other end is connected to that main winding 20, metal-oxide-semiconductor 30 drain, triode 70 colelctor electrodes and pwm chip 60 voltage input ends.
Triode 70 source class access input modules 10, emitter stage access pwm chip 60 voltage input ends.
Pwm chip 60 outputs are connected to metal-oxide-semiconductor 30 base stages.
After DC voltage is inputted, the transformer work that main winding 20 and output winding 50 form, thus triode base emitter-base bandgap grading conducting simultaneously makes pwm chip can maintain by adjusting dutycycle the output voltage stabilization of output winding with the ON time of adjusting metal-oxide-semiconductor; After DC voltage input reduces or disconnects, output winding 50 and power supply winding 40 form transformer, and electric current feeds back to pwm chip and metal-oxide-semiconductor again, and because triode is no longer in conducting state, makes electric current can not be sent to main winding.The voltage of pwm chip still can keep after DC input voitage disconnects, and in the time of next DC input voitage input, pwm chip starts to be powered by input voltage again, the energy storage of power supply winding.
In the utility model, when circuit is during in normal operating conditions, the control module that pwm chip and metal-oxide-semiconductor form can regulate the voltage of output winding output normally, when circuit is not during in normal operating conditions, because the control module that pwm chip and metal-oxide-semiconductor form that is arranged so that of triode and power supply winding still can normally be worked, triode also plays the effect of circuit isolation simultaneously, main winding and pwm chip are separated, reduce the electromagnetic interference of main winding to pwm chip.
Please refer to Fig. 3, preferably, the utility model also comprises filtration module 80, described filtration module 80 is arranged between input module 10 and main winding 20, described filtration module 80 comprises three parallel branches, the first parallel branch is made up of the second capacitor C 2, and the second parallel branch is made up of the first inductance L 1 and the second inductance L 2, and the 3rd parallel branch is made up of the 3rd resistance R 3 and the 4th resistance R 4; Wire 801 one end are arranged between the first inductance L 1 and the second inductance L 2, and the other end is arranged between the 3rd resistance R 3 and the 4th resistance R 4.
The filtration module that adopts foregoing circuit to connect is better to DC input voitage filter effect.
Preferably, the utility model also comprises metal-oxide-semiconductor drain voltage protection module 90, and described metal-oxide-semiconductor drain voltage protection module 90 and main winding 20 is in parallel and connect with metal-oxide-semiconductor 30; Described metal-oxide-semiconductor drain voltage protection module 90 comprises the first capacitor C 1, the first Zener diode W1, multiple the first resistance R 1, the first diode D1 being connected in series; Described the first capacitor C 1, the first Zener diode W1, the first resistance R 1 are connected in series with the first diode D1 after being connected in parallel; The first Zener diode W1 and the first diode D1 negative pole equipotential arrange, and metal-oxide-semiconductor 30 drains and is connected with the first diode D1 is anodal.
After DC input voitage reduces or disconnects, output winding 50 not only forms transformer with power supply winding 40, and the winding 40 that makes to power can continue the power supply of pwm chip and metal-oxide-semiconductor, also makes also to produce on main winding 20 flyback converter.In order to make flyback converter not affect metal-oxide-semiconductor voltage, metal-oxide-semiconductor drain voltage protection module 90 absorbs this flyback converter to consume.
More preferably, spacing between width, the winding wire of the winding wire of formation main winding 20 is also the important parameter that affects main winding performance and Electro Magnetic Compatibility, in the application, the width of the single winding wire of main winding 20 is preferably 0.3 to 1.5 millimeter, and the gap between winding wire is preferably 0.2-0.5 millimeter.
In order to make the operating efficiency of power module entirety higher, Electro Magnetic Compatibility is better, the application also specifically defines the following design parameter span of other components and parts in circuit, make power module performance better by the cooperation of those components and parts: described the first resistance value is 20-70 ohm, the first capacitance is 0.2 to 0.7 microfarad, the second capacitance is 5-10 pico farad, the 3rd resistance value is 100-200 ohm, the 4th resistance value is 50-70 ohm, the first inductance value is 0.5-1.5 milihenry, and the second inductance value is 10-25 milihenry.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (4)
1. an injection machine liquid electric servo system, comprise servo-driver, pressure sensor, rare-earth permanent-magnetic synchronous servomotor and oil pump, it is characterized in that: the preset pressure in described servo-driver storage injection machine different operating stage and preset flow signal, receive the oil pump actual pressure signal of being exported by pressure sensor simultaneously, thereby according to the output torque of the difference output control signal control rare-earth permanent-magnetic synchronous servomotor of setting pressure and actual pressure signal and flow and the pressure of rotating speed control oil pump; Wherein, described servo-driver comprises power module, and described power module comprises the input module for input direct voltage; Main winding, metal-oxide-semiconductor, power supply winding with main winding in the same side, with main winding in not multiple output windings, pwm chip, the triode of homonymy; Power supply winding one end ground connection other end is connected to main winding, metal-oxide-semiconductor drain electrode, transistor collector and pwm chip voltage input end; Pwm chip output is connected to metal-oxide-semiconductor base stage, and voltage input end is also connected with transistor emitter; Triode source class access input module; When DC voltage input, the increase of main winding magnetic flux makes to export winding output dc voltage with to other module for power supply of servo-driver, thereby simultaneously triode base emitter-base bandgap grading conducting makes the pwm chip can be by regulating dutycycle to regulate the ON time of metal-oxide-semiconductor maintain the output voltage stabilization of output winding; In the time that DC input voitage reduces or disconnect, inferior winding magnetic flux produces induced-current and supplies with pwm chip and metal-oxide-semiconductor than the power supply winding magnetic flux winding that makes greatly to power, and maintains pwm chip and metal-oxide-semiconductor in working order.
2. injection machine according to claim 1 liquid electric servo system, is characterized in that: also comprise metal-oxide-semiconductor drain voltage protection module, described metal-oxide-semiconductor drain voltage protection module and main winding are in parallel and connect with metal-oxide-semiconductor; Described metal-oxide-semiconductor drain voltage protection module comprises the first electric capacity, the first Zener diode, multiple the first resistance being connected in series, the first diode; After being connected in parallel, described the first electric capacity, the first Zener diode, the first resistance is connected in series with the first diode; The first Zener diode and the first diode cathode equipotential arrange, and metal-oxide-semiconductor drain electrode is connected with the first diode cathode.
3. injection machine according to claim 1 and 2 liquid electric servo system, it is characterized in that: also comprise filtration module, described filtration module is arranged between input module and main winding, described filtration module comprises three parallel branches, the first parallel branch is made up of the second electric capacity, the second parallel branch is made up of the first inductance and the second inductance, and the 3rd parallel branch is made up of the 3rd resistance and the 4th resistance; Wire one end is arranged between the first inductance and the second inductance, and the other end is arranged between the 3rd resistance and the 4th resistance.
4. injection machine according to claim 3 liquid electric servo system, is characterized in that: in described main winding, the width of single winding wire is 0.3 to 1.5 millimeter, and the gap between winding wire is 0.2-0.5 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086408.0U CN203765980U (en) | 2014-02-27 | 2014-02-27 | Hydro-electric servo system for injection molding machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086408.0U CN203765980U (en) | 2014-02-27 | 2014-02-27 | Hydro-electric servo system for injection molding machines |
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| Publication Number | Publication Date |
|---|---|
| CN203765980U true CN203765980U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420086408.0U Expired - Fee Related CN203765980U (en) | 2014-02-27 | 2014-02-27 | Hydro-electric servo system for injection molding machines |
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| CN (1) | CN203765980U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878961A (en) * | 2014-02-27 | 2014-06-25 | 张小友 | Liquid electric servo system for injection molding machine |
| CN105649804A (en) * | 2014-11-27 | 2016-06-08 | 罗伯特·博世有限公司 | Method for monitoring fuel pump |
| CN106849680A (en) * | 2017-04-01 | 2017-06-13 | 天津中科华盈科技有限公司 | A kind of optimal control circuit of simple direct current hydraulic system |
| CN112865403A (en) * | 2020-12-31 | 2021-05-28 | 成都市松川金属材料有限公司 | Energy-saving motor for bending machine and energy-saving method |
-
2014
- 2014-02-27 CN CN201420086408.0U patent/CN203765980U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878961A (en) * | 2014-02-27 | 2014-06-25 | 张小友 | Liquid electric servo system for injection molding machine |
| CN103878961B (en) * | 2014-02-27 | 2016-02-10 | 张小友 | A kind of injection machine liquid electric servo system |
| CN105649804A (en) * | 2014-11-27 | 2016-06-08 | 罗伯特·博世有限公司 | Method for monitoring fuel pump |
| CN106849680A (en) * | 2017-04-01 | 2017-06-13 | 天津中科华盈科技有限公司 | A kind of optimal control circuit of simple direct current hydraulic system |
| CN106849680B (en) * | 2017-04-01 | 2023-07-14 | 天津中科华盈科技有限公司 | Simple and easy direct current hydraulic system's optimal control circuit |
| CN112865403A (en) * | 2020-12-31 | 2021-05-28 | 成都市松川金属材料有限公司 | Energy-saving motor for bending machine and energy-saving method |
| CN112865403B (en) * | 2020-12-31 | 2022-07-01 | 成都市松川金属材料有限公司 | Energy-saving motor for bending machine and energy-saving method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20150227 |
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| EXPY | Termination of patent right or utility model |