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CN1701499A - Apparatus and method for charging and discharging a capacitor to a predetermined setpoint - Google Patents

Apparatus and method for charging and discharging a capacitor to a predetermined setpoint Download PDF

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Publication number
CN1701499A
CN1701499A CN03820972.1A CN03820972A CN1701499A CN 1701499 A CN1701499 A CN 1701499A CN 03820972 A CN03820972 A CN 03820972A CN 1701499 A CN1701499 A CN 1701499A
Authority
CN
China
Prior art keywords
smart material
voltage
equipment
material actuator
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN03820972.1A
Other languages
Chinese (zh)
Inventor
唐纳德·丸德思路易斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viking Technologies L C
Original Assignee
Viking Technologies L C
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viking Technologies L C filed Critical Viking Technologies L C
Publication of CN1701499A publication Critical patent/CN1701499A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/3353—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
    • H02N2/0075—Electrical details, e.g. drive or control circuits or methods
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

An apparatus using electrically stimulated smart material requires a power source to stimulate the material. This power source has three main functions, (1) to apply a known voltage potential across the smart material, (2) to convert from the control voltage to a level suitable for the smart material, and (3) to regulate the voltage based on a control input. The power source is a DC to DC converter with special properties achieved by supplying a variable stimulating voltage or actively discharging the actuator. The circuit also provides a dead band, or hysteresis, between the charge point and discharge point. When this circuit is applied with a proportional, mechanically leveraged smart material actuator, a general-purpose industrial actuator becomes a cost-effective solution.

Description

The equipment and the method that are used to make the capacitor charging and are discharged to a predetermined set point
The cross reference of related application
The application is that the U.S. Provisional Application of on September 5th, 2002 application number is the continuation of 60/408468 patent application, and this patent application is included in this as a reference.The application with on September 5th, 2002 U.S.'s provisional application number be that 60/408277 the continuation about the patent application of the equipment that makes capacitor charging and discharge and method is relevant.
Technical field
The present invention relates to be used to control the electronic method and the circuit of proportional universal actuator based on smart material.
Background technology
Researching and developing the actuator technologies that is widely used.An example comprises the smart material actuator with mechanical lever that responds electric excitation and change shape.The change and the input voltage of described shape are proportional.Because the change of this shape is mainly carried out along an axis, this actuator is used in the relevant enterprising line operate of mechanical system that comprises the lever that makes up with some main supporting structures.The change of axial displacement is amplified by lever, has the displacement of useful quantity and the actuator of power thereby form.This displacement and power for general-purpose industrial valve, anchor clamps, Drink dispenser, compressor or pump, brake, door lock, relay, circuit-breaker and by means of comprise solenoid, motor or and other application of the motor of various transmission combination be useful.But, smart material, specifically piezoelectric needs hundreds of volt voltages could activate and produce displacement.Such voltage may be do not allow facile, and may must derive from the voltage that lower voltage is for example obtained by battery.
Another feature of piezoelectric is that these nature are capacitives.In addition, an actuator uses 3 independent signal Be Controlled usually: control signal, main power source and ground.
Summary of the invention
A kind of equipment that makes capacitor charging and be discharged to predetermined set point comprises the smart material actuator and is used for operating in proportional mode voltage-controlled direct current (the DC)-DC converter of described smart material actuator.Described voltage-controlled DC-DC converter may further include the self-oscillation drive circuit that links to each other with the primary winding of recommending drive signal and transformer with 180 degree phase differences.Voltage-controlled DC-DC converter can also be included in the ancillary coil on the transformer.The DC-DC converter can also comprise an attached diode rectifier, is used for producing dc voltage by the AC signal of the secondary coil on the transformer, and the Voltage Feedback network that is used for voltage-regulation.
Voltage-controlled DC-DC converter may further include control circuit, is used to stop and starts self-oscillation mechanism, and can also be feature with a diode in input stage, is used for the reverse polarity protection.In addition, control circuit can also comprise ripple inductor and by-pass capacitor, and the EMI that is used to suppress to send enters the power supply of system.
Another feature of the present invention comprises the smart material drive circuit, is used for responding respectively with being connected with disconnection of power supply making described smart material actuator charging and discharge.At least one the drive circuit that is used for the charging of (actively) on one's own initiative control smart material actuator and discharge can respond a control signal.
Also be useful on an alternative embodiment of the invention that makes the capacitor charging and be discharged to a predetermined set point and comprise the smart material actuator, the power supply that can be connected with described smart material actuator, and be used to respond with power supply be connected remove the switching circuit that the smart material actuator is discharged on one's own initiative.The switching circuit that is used to the smart material actuator is charged on one's own initiative can further respond connection power supply or a control signal input.Switching circuit can respond a control signal and control the charging of described smart material actuator and discharge on one's own initiative one of at least, and may further include voltage comparator and field-effect transistor (FET), is used to control the DC-DC converter.According to the present invention, described switch can have three kinds of modes of operation: to the load charging, keep load and make load discharge.Thereby, may further comprise the steps according to the method that is used to make the capacitor charging and be discharged to a predetermined set point of the present invention: a kind of smart material actuator is provided, and utilizes voltage-controlled DC-DC converter to operate described smart material actuator in the ratio mode.May further comprise the steps according to the another kind of method that is used to make the capacitor charging and be discharged to a predetermined set point of the present invention: a kind of smart material actuator is provided, connect a power supply to described smart material actuator, and utilize a switching circuit response and described power supply be connected remove described smart material actuator discharged.
Utilize the prototype of Electronic Design and simulation software and circuit, can the minimum element of usage quantity, keep the effective and low power consumption of cost simultaneously.This electronic sub-system when being coupled with the smart material actuator with mechanical lever, forms a kind of technical solution of viable commercial, is used for common application and commercial Application.
For those skilled in the art, when below reading in conjunction with the accompanying drawings be used to implement the explanation of best way of the present invention the time, will be clear that other application of the present invention.
Description of drawings
This explanation is carried out with reference to accompanying drawing, and in institute's drawings attached, identical label is represented identical parts, wherein:
Fig. 1 uses the electronic schematic with voltage-controlled DC-DC converter of active adjustment of the present invention;
Fig. 2 is the electronic schematic of DC-DC converter of the present invention;
Fig. 3 is the electronic schematic of electronic switch of the present invention, the electric current of expression when switch closure;
Fig. 4 is the electronic schematic of electronic switch of the present invention, the electric current of expression when switch opens; And
Fig. 5 is the electronic schematic of control circuit of the present invention.
Embodiment
Fig. 1 represents to be used for the electronic schematic of system 10 of the smart material actuator (not shown) with mechanical lever of control ratio, comprises the power source special 12 and the control circuit 64 that are coupled with switching circuit 44.
According to the preferred embodiment, the power source special 10 of Fig. 1 is DC-DC converters, switching circuit and control circuit, and it is by operating or variable driving voltage being provided or making the actuator discharge.Can be found out best that by Fig. 2 DC-DC converter 12 (12 have been omitted among Fig. 2) comprises the supply voltage 14 that links to each other with ripple inductor 16, the ripple inductor is to reverse protection diode 18 feeds.Ripple inductor 16 is used to remove the noise that the collector electrode by negative positive and negative (NPN) transistor 20 that links to each other with supply voltage 14 produces as filter.NPN transistor 20 and NPN transistor 22 are formed for the push-pull driver of transformer 24. Resistance 26,28,30 and 32 form resitstance voltage divider, are used to be provided with the basic bias point of NPN transistor 20 and 22.
Transformer 24 not only is wound with primary winding 24a and secondary coil 24b, but also is wound with ancillary coil 24c.Ancillary coil 24c, transformer 24, resistance 34,36,28 and capacitor 38,40 form feedback devices, be used to cause the vibration on the base stage of NPN transistor 20,22.Described vibration has 180 degree phase differences between two NPN transistor 20,22, thereby forms self-oscillation push-pull transformer driver.The secondary coil 24b of transformer 24 links to each other with rectifier 42.When should be noted that the base earth when transistor 22, self-oscillation mechanism stops.When ground connection is removed, restart self-oscillation mechanism.As shown in Figure 1, when switching circuit 44 Be Controlled, can control the voltage that is added on capacitive load on one's own initiative.
Control circuit 64 monitors control voltage and output voltage, and determines to make the DC-DC converter to connect, and discharge switch is connected, and perhaps keeps current magnitude of voltage on capacitive load.Comprise in this system just in case supply voltage is removed the device of then forcing capacitive load ground connection.
Referring now to Fig. 3,, wherein shows the switching circuit 44 that separates with the schematic diagram of Fig. 1, so that the operating characteristics when it is closed is described better.When switch 48 closures, electric current charges through 52 pairs of capacitive loads of ripple inductors 54 by switch 48 from power supply 50.In addition, electric current also flows into resistive divider network 56,58 conductings of driving N PN transistor, and it makes NPN reach woods to end 60.Charge rate is by the impedance of power supply and the electric capacity decision of load 54.Resistance 62 and NPN transistor 58 are as power that is converted and the level translator between the control signal, and therefore the power that is converted needn't have identical magnitude of voltage with control signal.
Referring now to Fig. 4,, wherein shows the electric current in switching circuit 44 when switch 48 is opened.When switch 48 is opened, there is not electric current to flow out from power supply 50.Electric current also flows into resistive divider network 56 to ground by switch 48, and driving N PN transistor 58 ends, and it makes NPN reach woods to 60 conductings, makes capacitive load 54 discharges thereby electric current is flowed by resistance 46.The speed of discharge is by the value and capacitive load 54 decisions of resistance 46.Resistance 62 and NPN transistor 58 are as power that is converted and the level translator between the control signal, and therefore the power that is converted needn't have identical magnitude of voltage with control signal.
Referring now to Fig. 5,, wherein shows the control circuit 64 of Fig. 1 of isolation, so that the operating characteristics of circuit 64 is described better.The control voltage of simulation is introduced by resistance 66, and is a predetermined magnitude of voltage by Zener diode 68 clamps, makes the input that can not destroy operational amplifier 70.In addition, resistance 66 is parts of resistive divider network 72.Network 72 is derived two voltages: a voltage is the reference that is used to cut off DC-DC converter 12, and another is to be used to reference that capacitive load is initiatively discharged.Operational amplifier 70 is used in the mode of voltage comparator, and the cut-out mode of itself and DC-DC converter 12 is relevant.Operational amplifier 74 is used in the mode of voltage comparator, and initiatively discharge mode is relevant with DC-DC converter 12 for it. Resistance 76,78,80 form the second resistance voltage divider network.The voltage of this network monitoring capacitive load, and the voltage of deriving operational amplifier 70,74 and comparing by the voltage that resistance 66,72 is derived.When at the voltage of the anode of operational amplifier 70 during greater than the voltage of negative terminal, amplifier is output as positive saturation condition, makes 82 conductings of FET transistor, makes the DC-DC converter stop.
When at the voltage of the negative terminal of operational amplifier 70 during greater than the voltage of anode, the output of amplifier becomes negative saturation condition, and FET transistor 82 is ended, and makes the operation of DC-DC converter.When the voltage of the anode of operational amplifier 74 during greater than the voltage of negative terminal, the output of amplifier becomes positive saturation condition, makes 84 conductings of FET transistor, causes the active discharge of capacitive load.When at the voltage of the negative terminal of operational amplifier 74 during greater than the voltage of anode, the output of amplifier becomes negative saturation condition, and FET transistor 84 is ended.In this system, have 3 kinds of different states, (1) DC-DC converter is connected, and the capacitive load discharge switch is opened, and (2) DC-DC converter disconnects, and the capacitive load discharge switch is opened, and the disconnection of (3) DC-DC converter, and the capacitive load discharge switch is connected.
At Fig. 1, among the embodiment shown in 2,3,4 and 5, selected different elements according to current carrying capacity, voltage quota and component type.Other suitable element can comprise FET small-signal and power transistor, wire-wound resistor, film resistor and carbon combined resistance, pottery, tantalum and film capacitor, (cofired) wire-wound and low temperature co-fired ceramic transformer perhaps is generally used for any combination of mass-produced appropriate members.Though these materials that provide as an example provide excellent performance,, can use other combination of element according to different application requirements.Equally, the embodiment explanation that provides is at element available on the market.
Though the present invention is in conjunction with thinking that most preferred embodiment is illustrated at present, be to be understood that, the invention is not restricted to disclosed embodiment, in contrast, should cover the design and interior various changes and the equivalent structure of scope that are included in claims, the scope of claim should give the wideest explanation, makes to comprise allowed by law all remodeling and equivalent structure.

Claims (42)

1. equipment that is used to make the capacitive load charging and is discharged to predetermined set point comprises:
The smart material actuator; And
Be used for operating the voltage-controlled DC-DC converter of described smart material actuator in proportional mode.
2. equipment as claimed in claim 1, wherein said voltage-controlled DC-DC converter further comprise the self-oscillation drive circuit of recommending drive signal and linking to each other with the primary winding of transformer that has with 180 degree phase differences.
3. equipment as claimed in claim 2, voltage-controlled DC-DC converter also is included in the ancillary coil on the described transformer.
4. equipment as claimed in claim 2, wherein said voltage-controlled DC-DC converter also is included in the secondary coil on the described transformer.
5. equipment as claimed in claim 4, wherein said voltage-controlled DC-DC converter also comprises an attached diode rectifier, is used for producing dc voltage by the AC signal of the secondary coil on the transformer.
6. equipment as claimed in claim 2, wherein said voltage-controlled DC-DC converter also comprises the Voltage Feedback network that is used for voltage-regulation.
7. equipment as claimed in claim 2, wherein said voltage-controlled DC-DC converter also comprises 2 NPN transistor that limit a push-pull transformer driver.
8. equipment as claimed in claim 2, wherein said voltage-controlled DC-DC converter also comprises control circuit, is used to stop and starts self-oscillation mechanism.
9. equipment as claimed in claim 1, wherein said voltage-controlled DC-DC converter also is included in a diode on the input stage, is used for the reverse polarity protection.
10. equipment as claimed in claim 1, described converter also comprises ripple inductor and by-pass capacitor, is used to the EMI that suppresses to send, makes it not enter the power supply of system.
11. equipment as claimed in claim 1 also comprises the smart material drive circuit, is used for responding respectively with being connected with disconnection of power supply making described smart material actuator charging and discharge.
12. equipment as claimed in claim 1 also comprises the smart material drive circuit, is used to respond a control signal and controls the charging of smart material actuator and at least one of discharge on one's own initiative.
13. equipment as claimed in claim 2, wherein said transformer are the core constructions of wire-wound.
14. equipment as claimed in claim 2, wherein said transformer are the LTCC structures.
15. an equipment that is used to make the capacitor charging and is discharged to predetermined set point comprises:
The smart material actuator;
The power supply that can be connected with described smart material actuator; And
Response and described power supply be connected remove the switching circuit that is used for initiatively making the smart material actuator to discharge.
16. equipment as claimed in claim 15 comprises that also response connects described power supply, is used for initiatively making the switching circuit of smart material actuator charging.
17. equipment as claimed in claim 15 also comprises control signal of response, is used for the switching circuit of described smart material actuator charging of ACTIVE CONTROL and discharge.
18. equipment as claimed in claim 15 also comprises control signal of response, is used for the charging and the discharge switching circuit one of at least of the described smart material actuator of ACTIVE CONTROL.
19. equipment as claimed in claim 15, wherein said switch also comprise voltage comparator and FET transistor, are used to control the DC-DC converter.
20. equipment as claimed in claim 19, described switch have three kinds of modes of operation:, keep load and make load discharge to the load charging.
21. equipment as claimed in claim 15, wherein said switch also comprise voltage comparator and FET transistor, are used to control the active discharge of described smart material actuator.
22. equipment as claimed in claim 21, described switch have three kinds of modes of operation:, keep load and make load discharge to the load charging.
23. a method that is used to make the capacitor charging and is discharged to predetermined set point may further comprise the steps:
A smart material actuator is provided; And
Utilize voltage-controlled DC-DC converter to operate described smart material actuator in proportional mode.
24. method as claimed in claim 23 also comprises with the drive signal with 180 degree phase differences connecting the step of a self-oscillation drive circuit to the primary winding of transformer.
25. method as claimed in claim 24 also is included in the step that ancillary coil is provided on the described converter.
26. method as claimed in claim 24 also is included in the step that secondary coil is provided on the described transformer.
27. method as claimed in claim 26 also comprises the step of an attached diode rectifier, is used for producing dc voltage by the AC signal of the secondary coil on the transformer.
28. method as claimed in claim 24 comprises that also feedback voltage signal is used for the step of voltage-regulation.
29. method as claimed in claim 24 also comprises the step of 2 NPN transistor that are provided for limiting a push-pull transformer driver.
30. method as claimed in claim 24 also comprises the step of utilizing control circuit to stop and starting self-oscillation mechanism.
31. method as claimed in claim 23, the diode that provides that also is included on the input stage is used for reverse polarity protection's step.
32. method as claimed in claim 23 comprises that also the EMI that utilizes ripple inductor and by-pass capacitor to suppress to send makes it not enter the step of power supply.
33. method as claimed in claim 23 also comprises responding being connected and disconnection of a power supply and a smart material drive circuit respectively, initiatively makes the step of described smart material actuator charging and discharge.
34. method as claimed in claim 23 also comprises and utilizes control signal of smart material drive circuit response, controls at least one step of the charging of smart material actuator and discharge on one's own initiative.
35. a method that is used to make the capacitor charging and is discharged to predetermined set point may further comprise the steps:
A kind of smart material actuator is provided;
Connect a power supply to described smart material actuator; And
Utilize response of switching circuit and described power supply be connected remove, described smart material actuator is discharged.
36. method as claimed in claim 35 also comprises and utilizes being connected of described switching circuit response and described power supply, the initiatively step that described smart material actuator is charged.
37. method as claimed in claim 35 also comprises and utilizes control signal input of described switching circuit response, the charging of the described smart material actuator of ACTIVE CONTROL and the step of discharge.
38. method as claimed in claim 35 also comprises and utilizes control signal of described switching circuit response, the step of one of the charging of the described smart material actuator of ACTIVE CONTROL and discharge.
39. method as claimed in claim 35 also comprises the step of utilizing voltage comparator and FET transistor controls DC-DC converter.
40. method as claimed in claim 39, wherein said switch have three kinds of modes of operation:, keep load and make load discharge to the load charging.
41. method as claimed in claim 35 also comprises the step of the active discharge that utilizes described switch to control described smart material actuator.
42. method as claimed in claim 41, wherein said switch have three kinds of modes of operation:, keep load and make load discharge to the load charging.
CN03820972.1A 2002-09-05 2003-07-30 Apparatus and method for charging and discharging a capacitor to a predetermined setpoint Pending CN1701499A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40846802P 2002-09-05 2002-09-05
US60/408,468 2002-09-05

Publications (1)

Publication Number Publication Date
CN1701499A true CN1701499A (en) 2005-11-23

Family

ID=31978620

Family Applications (1)

Application Number Title Priority Date Filing Date
CN03820972.1A Pending CN1701499A (en) 2002-09-05 2003-07-30 Apparatus and method for charging and discharging a capacitor to a predetermined setpoint

Country Status (6)

Country Link
EP (1) EP1547233A1 (en)
JP (1) JP4421479B2 (en)
CN (1) CN1701499A (en)
AU (1) AU2003257010A1 (en)
CA (1) CA2495486C (en)
WO (1) WO2004023636A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947747A (en) * 1975-02-19 1976-03-30 Pylon Electronic Development Company Ltd. Regulated transistorized DC to DC converter and parallel operation of plurality of converters
EP0482112B1 (en) * 1990-05-08 1993-11-18 Caterpillar Inc. An apparatus for driving a piezoelectric actuator
JPH0662585A (en) * 1992-08-04 1994-03-04 Fujitsu Ltd Piezoelectric device control circuit
JP2758552B2 (en) * 1993-08-27 1998-05-28 浜松ホトニクス株式会社 Push-pull resonant switching power supply circuit
DE19733560B4 (en) * 1997-08-02 2007-04-05 Robert Bosch Gmbh Method and device for charging and discharging a piezoelectric element
US5895998A (en) * 1997-09-18 1999-04-20 Raytheon Company Piezoelectric drive circuit
FR2796219B1 (en) * 1999-07-09 2001-09-21 Renault DEVICE AND METHOD FOR CONTROLLING A PIEZOELECTRIC ACTUATOR
DE19944733B4 (en) * 1999-09-17 2007-01-04 Siemens Ag Device for controlling at least one capacitive actuator
DE60043181D1 (en) * 2000-04-01 2009-12-03 Bosch Gmbh Robert Method and device for controlling voltages and voltage gradients for driving a piezoelectric element
FR2813455B1 (en) * 2000-08-25 2003-07-25 Renault DEVICE FOR CONTROLLING A PIEZOELECTRIC CERAMIC, IN PARTICULAR FOR AN INJECTOR ACTUATOR OF AN INTERNAL COMBUSTION ENGINE

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Publication number Publication date
JP4421479B2 (en) 2010-02-24
CA2495486C (en) 2013-07-16
JP2006512034A (en) 2006-04-06
AU2003257010A1 (en) 2004-03-29
CA2495486A1 (en) 2004-03-18
WO2004023636A1 (en) 2004-03-18
EP1547233A1 (en) 2005-06-29

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