WO2006035540A1 - Generateur de puissance ca et refrigerateur de stirling employant celui-ci - Google Patents

Generateur de puissance ca et refrigerateur de stirling employant celui-ci Download PDF

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Publication number
WO2006035540A1
WO2006035540A1 PCT/JP2005/013257 JP2005013257W WO2006035540A1 WO 2006035540 A1 WO2006035540 A1 WO 2006035540A1 JP 2005013257 W JP2005013257 W JP 2005013257W WO 2006035540 A1 WO2006035540 A1 WO 2006035540A1
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WO
WIPO (PCT)
Prior art keywords
voltage
power
piston
waveform
inverter circuit
Prior art date
Application number
PCT/JP2005/013257
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Komori
Original Assignee
Sharp Kabushiki Kaisha
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 Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2006035540A1 publication Critical patent/WO2006035540A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/06—Linear motors
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/001—Gas cycle refrigeration machines with a linear configuration or a linear motor

Definitions

  • the present invention relates to an AC power generation device that outputs single-phase AC power and a Stirling refrigerator using the AC power generation device.
  • An AC power generator is a variable voltage that can change both the voltage and frequency of the output AC waveform by controlling the duty ratio of the switching element (the ratio of the ON period to one carrier cycle).
  • a variable frequency (WVF) circuit that is, an inverter circuit is used.
  • Patent Document 1 Japanese Patent Application No. 11-187654
  • the conventional AC power generation device described above is based on the assumption that the DC voltage input to the inverter circuit is always constant during one cycle of the AC waveform.
  • the duty ratio of the pulse has been determined.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an inverter circuit card or the like even when the input DC voltage fluctuates during one cycle of the AC voltage.
  • AC power generator that produces an ideal sine curve with output AC voltage waveform
  • V is to provide a Stirling refrigerator.
  • the AC power generation device of the present invention is an inverter circuit that converts DC power into AC power. And a voltage measurement circuit for measuring the voltage of the DC power and a microcomputer for inputting a voltage signal for specifying the measured voltage and controlling the inverter circuit by PWM (Pulse Width Modulation) using the voltage signal. ing.
  • the microcomputer also adjusts the duty ratio for each carrier period in PWM control so that the waveform of the AC power becomes a sine curve when the voltage signal fluctuates.
  • the waveform of the AC power output from the AC power generation device can be brought close to an ideal sine curve.
  • a Stirling refrigerator of the present invention includes a linear motor that includes the above-described AC power generation device and a coil to which AC power is supplied, and uses a magnetic force generated around the coil, and a piston that reciprocates by the linear motor. And a displacer that reciprocates due to pressure fluctuation caused by the reciprocating motion of the piston.
  • the AC power generation device outputs the AC voltage applied to the linear motor so that the waveform of the AC voltage does not become a distorted waveform different from the sine curve. Adjust the AC power voltage waveform. Therefore, the vibration of the Stirling refrigerator caused by the reciprocating motion of the piston and the displacer can be reduced.
  • the waveform of the AC voltage output from the AC power generation device draws an ideal sine curve.
  • FIG. 1 is a diagram for explaining a configuration of an AC power generation device used in Embodiment 1.
  • FIG. 2 is a block diagram of a microcomputer used in the AC power generation device according to the first embodiment.
  • FIG. 3 is a diagram showing the relationship between the ONZOFF operation of the U-phase transistor of Embodiment 1 and the set value of the up-Z down timer.
  • FIG. 4 ONZOFF operation and up-Z down timer of V-phase transistor of Embodiment 1 It is a figure which shows the relationship with a setting value.
  • FIG. 5 is a diagram for explaining a U-phase voltage pulse and a V-phase voltage pulse.
  • FIG. 6 is a flowchart for explaining an AC power shaping process of the embodiment.
  • FIG. 7 is a cross-sectional view showing the structure of the Stirling refrigerator of the embodiment.
  • the AC power generation device of the present embodiment has an inverter circuit 100.
  • the inverter circuit 100 has four switching elements and is connected to a linear motor M housed in the Stirling refrigerator 40, for example, in the manner shown in FIG.
  • the four switching elements are transistors Gu, Gx, Gv, and Gy, each with a flywheel diode connected between the source and drain electrodes
  • the transistor Gu and the transistor Gx are connected in series, and the transistor Gv and the transistor Gy are connected in series.
  • the linear motor M has one terminal connected to a node between the transistor Gu and the transistor Gx, and the other terminal connected to a node between the transistor Gv and the transistor Gy.
  • a smoothing capacitor C is provided in parallel with the inverter circuit 100.
  • a rectifier D is provided in parallel to the smoothing capacitor C.
  • an AC power supply G is provided in parallel with the rectifier D.
  • a capacitor CC for stabilizing the potential of the inverter circuit 100 is provided. Further, between the capacitor C and the capacitor CC and the inverter circuit 100, a resistor R and a resistor R are provided in parallel to the capacitors C and CC. Resistance
  • Capacitor CCC is connected in parallel.
  • Capacitor CCC consists of resistor R and resistor R Is to stabilize the potential of the node between the two.
  • a node between the resistor R and the resistor R is a voltage sensor of the microcomputer 1000.
  • the micro computer 1000 Detected by the mouth computer 1000. Using the potential value, the micro computer 1000 detects the value of the DC voltage input to the inverter circuit 100. In short, a voltage signal specifying the voltage of DC power input to the inverter circuit 100 is input to the voltage sensor.
  • FIG. 2 is a block diagram for explaining the configuration of a microcomputer 1000 for controlling a single-phase linear motor in which one PWM inverter control timer (one channel) is built.
  • the microcomputer 1000 of the AC power generation device includes a clock circuit as an oscillator, a CPU (Central Processing Unit) as a calculation means, and a rewritable storage means.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • the RAM is a storage means for temporarily storing the results of the operation performed by the CPU in accordance with the program stored in the ROM, and may include temporary storage means such as a register. Furthermore, the clock is used to form a clock pulse that is a basis for operating a timer described later using a signal transmitted from the oscillator.
  • the microcomputer 1000 is provided with two registers corresponding to the two phases of the up-Z down timer 1! /, Respectively. This register determines the setting value described later. This setting value determines the amplitude and frequency of the signal wave (sin wave) in PWM control. In addition, the setting value is determined by the microcomputer 1000 when the duty ratio of the peak voltage pulse constituting the target AC waveform, that is, the maximum voltage value of the AC voltage and the frequency of the target AC waveform are input. Calculated automatically.
  • the above-described ROM in the ROM is set so that the phase angle difference between the U phase and the V phase is 180 degrees. Is set.
  • the PWM control signal output from the U-phase control circuit is sent to the gate electrodes of transistors Gu and Gx.
  • the PWM control signal output from the V-phase control circuit is sent to the gate electrodes of transistors Gv and Gy.
  • the up / down timer 1 is set to the set values SI, S2, ...
  • a PWM control signal is automatically output from microcomputer 1 000 to U-phase transistors Gu and Gx, and after transistor Gx is turned off, transistor Gu is turned on. Thereafter, the transistor Gu is automatically turned OFF a predetermined time before the ON timing of the transistor Gx.
  • the microcomputer 1000 automatically outputs a PWM control signal to the U-phase transistor Gx. As a result, the transistor Gx is turned ON.
  • the transistor Gv is always OFF and the transistor Gy is always ON.
  • the up / down timer 1 is set to the set value during the count-up ... Sn-1, Sn respectively
  • the PWM control signal is automatically output from the microcomputer 1000 to the V-phase transistors Gv and Gy, and after the transistor Gy is turned off, the transistor Gv is turned on. Thereafter, the transistor Gv is automatically turned OFF a predetermined time before the ON timing of the transistor Gy.
  • the microcomputer 1000 automatically outputs a PWM control signal to the V-phase transistor Gy. As a result, the transistor Gy is turned ON.
  • the set value of each register of up Z down timer 1 is changed for each carrier period.
  • the set values SI, S2, 1 and Sn for each carrier period of up Z down timer 1 in Figs. 3 and 4 are the width of the voltage pulse W
  • W2 to Wn-l, Wn changes sequentially as a graph showing the relationship between time and Wn draws a sine wave.
  • a waveform is formed only by the transistors Gu and Gy.
  • a waveform is formed only by transistors Gv and Gx, and in the entire cycle, as shown in Fig. 5 (c), the waveform of the U phase described above is formed.
  • the V and V phase waveforms are output alternately with a 180 ° phase shift.
  • Voltage signal power that specifies the voltage of the signal, that is, the DC power input to the inverter circuit 100. After being acquired by the voltage sensor shown in FIG. It is stored in RAM.
  • the voltage command value V (t) of the next voltage pulse that has been previously determined and stored in the RAM, and the value of the frequency f of the AC waveform are read out from the RAM force.
  • the voltage command value V (t) of the next voltage pulse is a value determined based on the maximum effective voltage of the AC waveform input to the microcomputer 1000 by the user. This value indicates the magnitude of the voltage applied to the linear motor by the voltage pulse.
  • the next set value S (t) is calculated using the duty ratio D (t) and the maximum value Sp of the set value, that is, the maximum value of the up / down timer 1 shown in FIGS. decide.
  • the maximum value Sp of the set value is the peak value of the PWM control carrier wave, and is a predetermined value.
  • the set value S (t) is used to output a PWM control signal to each transistor as described with reference to FIGS.
  • the voltage pulse of the immediately following carrier cycle corresponding to the fluctuation of the DC voltage that is, the input voltage Vdc (t) to the inverter circuit 100.
  • the process of correcting the duty ratio D (t) is executed every carrier period.
  • the duty ratio D (t) of the voltage pulse is corrected so that the AC waveform draws an ideal sine curve. Therefore, according to the AC power generation device of the present embodiment as described above, an ideal sine curve is obtained. AC power to draw is generated.
  • S8 it is determined whether or not the force has ended one carrier cycle.
  • S8 if one carrier cycle is not completed, the power carrier that repeats the process in S8 is repeated. If one carrier cycle completes, the process in S9 is executed.
  • the piston reciprocates by the linear motor, and thereby the displacer reciprocates.
  • one end of each of the piston and the displacer is fixed to the panel. Therefore, if the waveform of the AC voltage applied to the linear motor M deviates from the ideal sine curve, the Stirling refrigerator vibration due to the reciprocating motion of the piston and the displacer may increase. If the AC power generation device described above is used, the waveform of the AC voltage applied to the linear motor is likely to be an ideal sine curve. Therefore, the AC power generation device described above is very suitable for controlling the Stirling refrigerator 40.
  • FIG. 7 is a cross-sectional view showing the Stirling refrigerator 40 of the embodiment.
  • a cylindrical piston 1 and a displacer 2 are fitted in a cylindrical cylinder 3 composed of two parts.
  • the piston 1 and the displacer 2 are provided via a compression space 9 and have an axis Y as a common drive shaft.
  • An expansion space 10 is formed on the distal end side of the displacer 2.
  • the compression space 9 and the expansion space 10 communicate with each other via a medium flow passage 11 through which a working medium such as helium flows.
  • a regenerator 12 is provided in the medium flow passage 11. The regenerator 12 accumulates the heat of the working medium and supplies the accumulated heat to the working medium.
  • a flange 3a is provided in the middle of the cylinder 3.
  • a dome-shaped pressure vessel 4 must be attached to the collar 3a
  • a bounce space (rear space) 8 sealed by is formed.
  • the piston 1 is integrated with the support panel 5 on the rear end side.
  • the displacer 2 is integrated with the support panel 6 through a rod 2a passing through the center hole la of the piston 1.
  • the support panel 5 and the support panel 6 are connected by bolts and nuts 22.
  • the displacer 2 reciprocates in a state having a predetermined phase difference with respect to the piston 1 due to the inertial force generated between the piston 1 and the displacer 2.
  • An inner yoke 18 is fitted on the outer side of the cylinder 3 in the bounce space 8.
  • the outer yoke 17 is opposed to the inner yoke 18 through the gap 19.
  • a drive coil 16 is fitted inside the outer yoke 17.
  • An annular permanent magnet 15 is movably provided in the gap 19.
  • the permanent magnet 15 is integrated with the piston 1 through a cup-shaped sleeve 14.
  • the inner yoke 18, the outer yoke 17, the drive coil 16, and the permanent magnet 15 constitute a linear motor 13 (M) that moves the piston 1 along the axis Y.
  • Lead wires 20 and 21 are connected to the drive coil 16.
  • the lead wires 20 and 21 pass through the wall surface of the pressure vessel 4 and are connected to the inverter circuit 100 of the AC power generation device.
  • Drive power is supplied to the linear motor 13 (M) by the IPM 200 of the AC power generator.
  • the piston 1 is driven by the linear motor 13.
  • the piston 1 is supported on the support panel 5 by inertia. Therefore, piston 1 moves so that the relationship between its position and time draws a sine wave.
  • the working gas in the compression space 9 moves so that the relationship between the pressure and time draws a sine wave.
  • the working gas compressed in the compression space 9 first releases heat from the compression space 9 as a heat exchange part for heat dissipation.
  • the compressed working gas is cooled by a regenerator 12 provided around the displacer 2. Thereafter, the compressed working gas flows from the regenerator 12 into the expansion space 10 as a heat exchange part for heat absorption.
  • the working gas in the expansion space 10 is expanded by the movement of the displacer 2.
  • the temperature of the expanded working gas decreases.
  • the working gas in the expansion space 10 moves so that the relationship between its pressure and time draws a sine wave.
  • the sine wave indicating the relationship between the pressure of the working gas in the expansion space 10 and time is a waveform having a predetermined phase difference from the sine wave indicating the relationship between the pressure of the working gas in the compression space 9 and time.
  • the waveform changes with the same period.
  • the displacer 2 reciprocates with a predetermined phase difference with respect to the piston 1.
  • the refrigeration capacity in the expansion space 10 is determined by the degree of fluctuation in the pressure of the working gas in the expansion space 10 caused by the reciprocating motion of the displacer 2. Further, the pressure in the expansion space 10 is a relative change between the displacer 2 and the piston 1 caused by the change between the phase of the piston 1 and the phase of the displacer 2, that is, the difference between the pressure in the expansion space 10 and the pressure in the compression space 9. Fluctuates depending on the position
  • the relative positional relationship between the displacer 2 and the piston 1 is determined by the mass of the displacer 2, the panel constant of the support panel 6, and the frequency of the piston 1.
  • the mass of the displacer 2 and the panel constant of the support panel 6 are determined at the time of design.
  • the PWM control signal output from the microcomputer 1000 to the inverter circuit 100 is a digital signal, that is, a pulse waveform.
  • This pulse waveform is converted into an analog signal, that is, a sine wave in the inverter circuit 100.
  • the frequency of this sine wave becomes the frequency of piston 1 of Stirling refrigerator 40.
  • PWM is used as described above when converting a digital signal into an analog signal. In other words, multiple pulses that are sequentially output from the microcomputer 100 gradually change from a small force to a large force, and after reaching the peak width, gradually return to a smaller one. Has been. Thereby, an AC waveform is generated.

Abstract

Selon la variation d’une tension CC, c’est-à-dire une tension d’entrée Vdc(t) sur un circuit inverseur, le facteur de marche D(t) d’une impulsion de tension dans la période de porteuse suivant immédiatement IS est modifié. Plus spécifiquement, un traitement pour corriger le facteur de marche D(t) est exécuté pour chaque période de porteuse. En conséquence, le facteur de marche D(t) de l’impulsion de tension est corrigé de sorte que la forme d’onde CA trace une courbe sinusoïdale idéale même si la tension d’entrée Vdc(t) varie. Ainsi, il est possible d’obtenir un générateur de puissance CA susceptible de fournir une alimentation CA stable.
PCT/JP2005/013257 2004-09-29 2005-07-19 Generateur de puissance ca et refrigerateur de stirling employant celui-ci WO2006035540A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004283439A JP2006101616A (ja) 2004-09-29 2004-09-29 交流電力生成装置およびそれが用いられたスターリング冷凍機
JP2004-283439 2004-09-29

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WO2006035540A1 true WO2006035540A1 (fr) 2006-04-06

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015155656A (ja) * 2014-02-20 2015-08-27 株式会社テクノ高槻 電磁振動型ダイヤフラムポンプおよびその駆動方法
JP6673789B2 (ja) * 2016-09-13 2020-03-25 日立グローバルライフソリューションズ株式会社 制振装置及び洗濯機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04364395A (ja) * 1991-06-11 1992-12-16 Matsushita Electric Ind Co Ltd 電力変換装置
WO2001041291A1 (fr) * 1999-11-29 2001-06-07 Mitsubishi Denki Kabushiki Kaisha Regulateur d'inverseur
JP2003083627A (ja) * 2001-09-10 2003-03-19 Sharp Corp スターリング冷凍機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04364395A (ja) * 1991-06-11 1992-12-16 Matsushita Electric Ind Co Ltd 電力変換装置
WO2001041291A1 (fr) * 1999-11-29 2001-06-07 Mitsubishi Denki Kabushiki Kaisha Regulateur d'inverseur
JP2003083627A (ja) * 2001-09-10 2003-03-19 Sharp Corp スターリング冷凍機

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