WO2012114984A1 - Dispositif de commande de génération électrique - Google Patents

Dispositif de commande de génération électrique Download PDF

Info

Publication number
WO2012114984A1
WO2012114984A1 PCT/JP2012/053749 JP2012053749W WO2012114984A1 WO 2012114984 A1 WO2012114984 A1 WO 2012114984A1 JP 2012053749 W JP2012053749 W JP 2012053749W WO 2012114984 A1 WO2012114984 A1 WO 2012114984A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
load
turned
fet
mos
Prior art date
Application number
PCT/JP2012/053749
Other languages
English (en)
Japanese (ja)
Inventor
堀口睦弘
Original Assignee
株式会社村田製作所
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 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2012114984A1 publication Critical patent/WO2012114984A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • 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
    • H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
    • H02N2/181—Circuits; Control arrangements or methods

Definitions

  • the present invention relates to a power control apparatus that controls supply of power from a power supply to a load.
  • Patent Document 1 discloses a power generator that reduces power consumption of a main power source by supplying power charged in a secondary battery to a load.
  • FIG. 1 is an explanatory diagram showing an outline of the power generation device described in Patent Document 1.
  • FIG. 1 In the power generation device described in Patent Document 1, when an electric signal is generated in the piezoelectric element 101 in the cushion 100 due to the pressure applied to the cushion 100, the switch 104 is turned on, and the electric signal is connected to the piezoelectric element 101 by the conducting wire 102. The power storage unit 103 is charged.
  • Patent Document 2 discloses a power generation device that enables power supply to a load even in a place where power cannot be obtained.
  • the power generation device described in Patent Literature 2 generates power by converting kinetic energy such as vibration motion into electric energy, and charges the generated power to a secondary battery. Also in Patent Document 2, power can be saved by supplying power from the secondary battery to the load in combination with the main power source.
  • Patent Documents 1 and 2 since the amount of charge of the secondary battery is limited, as in Patent Documents 1 and 2, even if the power charged in the secondary battery is supplied to the load, the power supply time is short, and the load is not sufficient with the secondary battery alone. Cannot supply enough power. For this reason, in Patent Documents 1 and 2, the power supply time from the main power source to the load cannot be greatly shortened, and the power consumption of the main power source cannot be sufficiently suppressed.
  • an object of the present invention is to provide a power control device capable of effectively suppressing power consumption of a power source.
  • the present invention relates to a power control apparatus that controls the supply of power from a power source to a load, a power generation unit that generates power using external energy, and operates with the power generated by the power generation unit. Switching means for turning on and off the supply of electric power.
  • the power from the power source is supplied to the load, and the power for operating the switching means for turning on / off the power supply to the load is supplied by the power generation means.
  • the power consumption of the power source can be suppressed by turning off the power supply from the power source to the load.
  • the switching means for turning off the supply of power from the power source to the load is operated not by the power of the power source but by the power generated by the power generation means, the contradiction that the power of the power source is consumed for power saving of the power source. Therefore, it is possible to effectively realize power saving of the power source without causing the above.
  • the switching unit is switched on when the power generation unit generates power, and is switched off when the power generation unit does not generate power.
  • the switching means may be switched on when the voltage generated by the power generation means is a predetermined value or more.
  • the switching means may be switched off after a predetermined time elapses after switching on.
  • the switching unit since the switching unit is turned on only for a predetermined time, even if the power generation unit continues to generate power, the power supply can be prevented from being turned on more than necessary.
  • the power control device may further include power storage means for storing power from a power source, and the switching means may be turned on by the power stored by the power storage means.
  • the power control apparatus further includes a detection unit that detects a storage amount of the power storage unit, and the switching unit includes a first switching element that connects or blocks power supply from the power source to the power storage unit, and the power storage unit.
  • a second switching element for connecting or cutting off the supply of power from the load to the load, and when the power generation means generates power, the first switching element is turned on, the second switching element is turned off, and the detection means is a predetermined value
  • the first switching element may be switched off and the second switching element may be switched on.
  • the first and second switching elements can be turned on and off to supply power from the power source to the power storage means. Thereby, necessary electric power can be repeatedly stored in the storage means.
  • the switching means has two contact points connected to the load and the power source, respectively, and a voltage application terminal to which a voltage is applied.
  • a transistor that allows current to flow through the contact is preferable.
  • the switching means for turning on / off the supply of power from the power source to the load is operated not by the power of the power source but by the power generated by the power generation means. Therefore, the power of the power source is reduced for power saving of the power source.
  • the power consumption of the power supply can be effectively suppressed without causing a contradiction of consumption.
  • FIG. 1 is a schematic circuit diagram showing a power supply circuit including a power control apparatus according to Embodiment 1 of the present invention.
  • the typical circuit diagram which shows the electric power supply circuit containing the electric power control apparatus which concerns on Embodiment 2 of this invention.
  • the typical circuit diagram which shows the electric power supply circuit containing the electric power control apparatus which concerns on Embodiment 3 of this invention.
  • the power control apparatus is an apparatus for switching power supply from a power supply to a load or switching the power supply and controlling power supply to the load to suppress power consumption of the power supply.
  • the power control apparatus will be described as being mounted on an information communication device such as a mobile phone.
  • the load supplied from the power supply may be any load that does not need to be supplied constantly, such as an LED (Light Emitting Diode), sensor, or RF (Radio Frequency) tag.
  • FIG. 2 is a schematic circuit diagram showing the power supply circuit 1 including the power control apparatus 10 according to the first embodiment of the present invention.
  • the power supply circuit 1 includes a power control device 10, a power supply 20 and a load 30.
  • the power source 20 is, for example, a lithium battery that is a main power source of a device on which the power supply circuit 1 is mounted, and serves as a main power source for the load 30.
  • the power supply 20 has a negative electrode connected to the ground and a positive electrode connected to the load 30.
  • the load 30 is an LED, a sensor, an RF tag, or the like as described above, and operates when power is supplied from the power supply 20.
  • the load 30 includes an input terminal (not shown) to which power from the power supply 20 is input, and a ground terminal (not shown).
  • the input terminal is connected to the positive electrode of the power supply 20.
  • the ground terminal is connected to the ground via a MOS-FET 12 described later included in the power control device 10.
  • the power control device 10 is provided on the ground side wiring connecting the power source 20 and the load 30. As will be described in detail later, the power control apparatus 10 has a switching function, and performs on / off control of power feeding from the power supply 20 to the load 30. By enabling the power control device 10 to turn on and off the power supply to the load 30, the power consumption of the power supply 20 can be suppressed by preventing the power supply to the load 30 when the operation of the load 30 is unnecessary.
  • the capacitor Ca is provided.
  • the capacitor Ca is a bypass capacitor for removing noise components and the like.
  • the power control device 10 includes a piezoelectric element 11 as a power generation means and an n-channel MOS-FET (Metal-Oxide-Semiconductor Field-Effect Transistor) 12 as a switching element.
  • MOS-FET Metal-Oxide-Semiconductor Field-Effect Transistor
  • the piezoelectric element 11 has a configuration in which a piezoelectric body such as a piezoelectric ceramic that converts mechanical energy into electrical energy is sandwiched between two electrodes.
  • Mechanical energy is vibration, pressure or heat.
  • an electromotive force is generated when pressure is applied to the piezoelectric body.
  • the generated electromotive force can be taken out from the electrode.
  • One electrode of the piezoelectric element 11 is connected to the ground via a resistor R2.
  • the other electrode of the piezoelectric element 11 is connected to the resistor R1 connected to the ground and the anode of the diode D1.
  • the cathode of the diode D1 is connected to each of the capacitor C1 connected to the ground and the gate (G) of the MOS-FET 12.
  • the MOS-FET 12 has a source (S) connected to the ground and a drain (D) connected to the ground terminal of the load 30.
  • the MOS-FET 12 controls the current flowing between the drain (D) and the source (S) by the voltage between the gate (G) and the source (S). More specifically, when a voltage higher than the threshold is applied so that the potential of the gate (G) becomes higher with respect to the source (S), current flows from the drain (D) to the source (S). become.
  • the MOS-FET 12 is turned on when a voltage higher than the threshold is applied to the gate (G) of the MOS-FET 12 so that a current flows between the drain (D) and the source (S). To do. Further, turning off the MOS-FET 12 is a state in which no current flows between the drain (D) and the source (S) of the MOS-FET 12.
  • the piezoelectric element 11 converts mechanical energy into electrical energy, and a potential difference is generated between both electrodes of the piezoelectric element 11.
  • the generated voltage is applied to the gate (G)
  • the MOS-FET 12 is turned on. That is, power supply from the power source 20 to the load 30 is turned on.
  • the MOS-FET 12 is a switching means for turning on / off the power supply.
  • the resistors R1 and R2 are filter elements for consuming electrical energy by the piezoelectric element 11 with respect to unnecessary frequencies so that the gate voltage of the MOS-FET 12 does not increase and prevents the MOS-FET 12 from malfunctioning.
  • the diode D1 is a rectifying element that allows current to pass only from the piezoelectric element 11 in the direction of the MOS-FET 12.
  • the capacitor C1 has a sufficiently long discharge time constant with respect to the leakage resistance of the MOS-FET 12, and prevents an excessive voltage from being applied to the gate (G). Note that a discharge resistor may be connected in parallel with the capacitor C1, and the time during which the MOS-FET 12 is turned on may be determined by the discharge time constant.
  • the power control device 10 controls the on / off of the power supply to the load 30, thereby realizing power saving of the power supply 20. Further, on / off control of power supply to the load 30 uses power generated by the piezoelectric element 11 of the power control device 10 instead of power from the power supply 20, and therefore requires extra power for power supply control. Therefore, the power saving and the extension of the life of the power source 20 are not hindered.
  • FIG. 3 is a schematic circuit diagram showing the power supply circuit 1 including the power control apparatus 10 according to the second embodiment of the present invention.
  • the power control apparatus 10 further includes a MOS-FET 13 in addition to the configuration of the first embodiment.
  • the drain (D) of the MOS-FET 13 is connected to the cathode of the diode D1, and the source (S) is connected to the ground.
  • the gate (G) of the MOS-FET 13 is connected to the load 30.
  • the load 30 includes a timer, for example.
  • the load 30 outputs a Hi signal to the gate (G) of the MOS-FET 13 after a predetermined time has elapsed since the power is supplied from the power supply 20 to turn on the MOS-FET 13.
  • the piezoelectric element 11 when the piezoelectric element 11 generates power and a voltage is applied to the gate (G) of the MOS-FET 12, the MOS-FET 12 is turned on and the power supply from the power source 20 to the load 30 is also turned on. It becomes.
  • the piezoelectric element 11 stops generating power and no voltage is applied to the gate (G) of the MOS-FET 12 the MOS-FET 12 is turned off, and the power supply from the power source 20 to the load 30 is also turned off.
  • the power control apparatus 10 after turning on the power supply from the power supply 20 to the load 30, even when the piezoelectric element 11 continues to generate power, if a certain time elapses.
  • the power supply to the load 30 can be turned off. Thereby, it is possible to realize power saving and long life of the power source 20 without supplying power to the load 30 more than necessary.
  • the circuit described in the second embodiment is provided with a power storage unit that stores the power of the power supply 20, and the load 30 is supplied with the power stored in the power storage unit.
  • the power source 20 can consume only the power necessary for the load 30, so that power saving and long life of the power source 20 can be realized.
  • FIG. 4 is a schematic circuit diagram showing the power supply circuit 1 including the power control apparatus 10 according to the third embodiment of the present invention.
  • the power supply circuit 1 according to the third embodiment further includes a MOS-FET 14, a comparator 15, and a capacitor C2.
  • the capacitor C2 is a power storage unit that stores the power of the power supply 20, and has one end connected to the positive electrode of the power supply 20 and the other end connected to the drain (D) of the MOS-FET 12.
  • the comparator 15 is a detecting means for detecting the amount of electricity stored in the capacitor C2, and operates by the voltage of the power source 20.
  • the comparator 15 compares the potential between the input voltage and the reference voltage, and when the input voltage is higher than the reference voltage, outputs a Hi signal from the output terminal.
  • the output terminal of the comparator 15 is connected to the gate (G) of each of the MOS-FET 13 and the MOS-FET 14.
  • the output terminal of the comparator 15 is connected to the non-inverting input terminal of the comparator 15 through the feedback resistor R6.
  • the non-inverting input terminal of the comparator 15 is connected in parallel to the capacitor C2, and is connected between the voltage dividing resistors R3 and R4 connected in series.
  • the inverting input terminal of the comparator 15 is connected in parallel to the capacitor C2, and is connected between the resistor R5 and the Zener diode D2 connected in series.
  • the Zener diode D2 is an element for generating a stable reference voltage, and has a cathode connected to the inverting input terminal of the comparator 15 and an anode connected to the ground.
  • the source (S) is connected to the drain (D) of the MOS-FET 12, and the drain (D) is connected to the ground terminal of the load 30.
  • the piezoelectric element 11 when the piezoelectric element 11 generates power and a voltage is applied to the gate (G) of the MOS-FET 12, the MOS-FET 12 is turned on. At this time, the MOS-FET 13 and the MOS-FET 14 are turned off. Then, the electric power from the power source 20 is stored in the capacitor C2.
  • the comparator 15 becomes operable, and compares the stored voltage of the capacitor C2 with the reference voltage. By detecting the storage voltage of the capacitor C2, the storage amount that is the power of the capacitor C2 can be detected.
  • the comparator 15 outputs a Hi signal from the output terminal when the stored voltage of the capacitor C2 is higher than the reference voltage. As a result, a voltage is applied to the gate (G) of each of the MOS-FET 13 and the MOS-FET 14, and the MOS-FET 13 and the MOS-FET 14 are turned on.
  • the MOS-FET 13 When the MOS-FET 13 is turned on, the MOS-FET 12 is turned off as in the second embodiment. Thereby, thereafter, the power supply from the power source 20 is turned off to the capacitor C2.
  • the comparator 15 stops outputting the Hi signal, and the MOS-FET 13 and the MOS-FET 14 are turned off.
  • the piezoelectric element 11 is generating electric power
  • the MOS-FET 12 is turned on again, and the capacitor C2 stores electricity from the power source 20.
  • the third embodiment since only the power necessary for the load 30 needs to be stored in the capacitor C2, power saving of the power source 20 can be realized. Further, if the power storage capacity of the capacitor C2 is adjusted, the power supply time to the load 30 can be adjusted, so that an element such as a timer becomes unnecessary.
  • the specific configuration of the power control apparatus 10 can be changed as appropriate, and the actions and effects described in the above-described embodiment are merely a list of the most preferable actions and effects that arise from the present invention.
  • the operations and effects of the present invention are not limited to those described in the above embodiment.
  • the power generation means may be not only the piezoelectric element 11 but also a Peltier element.
  • the switching means for turning on / off the power supply is not limited to a MOS-FET, but may be a contactless transistor (for example, a bipolar transistor) or a contact switching element.
  • the piezoelectric element 11 when the piezoelectric element 11 is generating power, the power supply to the load 30 is turned on. However, when the piezoelectric element 11 generates power, the power supply to the load 30 may be turned off. .
  • the comparator 15 is used as detection means for detecting the charged amount of the capacitor C2, but this configuration is not necessary.
  • the storage amount may be calculated based on the current flowing through the capacitor C2.
  • the device on which the power control apparatus 10 is mounted has been described as an information communication device such as a mobile phone, it is not limited to this.
  • the fire alarm issues an alarm when it detects heat, for example.
  • the power control device 10 is configured to turn on the switch so that the heat is mechanical energy, and when the power is generated by the heat, the power is supplied to the alarm device.
  • 1-power supply circuit 10-power control device 11-piezoelectric element (power generation means) 12-MOS-FET (switching means, first switching element) 13-MOS-FET (switching means) 14-MOS-FET (switching means, second switching element) 15-Comparator (detection means) 20-Power supply 30-Load C1-Capacitor C2-Capacitor (power storage means)

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

La présente invention concerne un dispositif de commande de génération électrique (10), destiné à la commande d'une alimentation électrique entre une source électrique (20) et une charge (30). Le dispositif comprend : un élément piézo-électrique (11), destiné à la génération d'électricité par vibration, par pression, ou à l'aide d'autres moyens ; et un transistor MOS-FET (12), destiné à mettre en et hors circuit l'alimentation de génération électrique entre la source électrique (20) et la charge (30). L'élément piézo-électrique (11) est connecté à une grille (G) du transistor MOS-FET (12). Lorsque l'élément piézo-électrique (11) génère de l'électricité, une tension est appliquée à la grille (G) du transistor MOS-FET (12), mettant en circuit l'alimentation de génération électrique entre la source électrique (20) et la charge (30). Lorsqu'il n'y a pas d'électricité générée, aucune tension ne sera appliquée à la grille (G) du transistor MOS-FET (12), mettant hors circuit l'alimentation de génération électrique entre la source électrique (20) et la charge (30). L'invention concerne ainsi un dispositif de commande de génération électrique permettant de minimiser effectivement la consommation en génération électrique de la source électrique.
PCT/JP2012/053749 2011-02-23 2012-02-17 Dispositif de commande de génération électrique WO2012114984A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-036708 2011-02-23
JP2011036708 2011-02-23

Publications (1)

Publication Number Publication Date
WO2012114984A1 true WO2012114984A1 (fr) 2012-08-30

Family

ID=46720765

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/053749 WO2012114984A1 (fr) 2011-02-23 2012-02-17 Dispositif de commande de génération électrique

Country Status (1)

Country Link
WO (1) WO2012114984A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11288319A (ja) * 1998-01-28 1999-10-19 Seiko Instruments Inc 電子機器
JPH11299093A (ja) * 1998-04-10 1999-10-29 Sony Corp 電源供給アダプタ、電子機器および信号伝送システム
JP2005287171A (ja) * 2004-03-29 2005-10-13 Dt Circuit Technology Co Ltd 携帯機器の電源装置、携帯機器の電源制御方法
JP2005312157A (ja) * 2004-04-20 2005-11-04 Sharp Corp 直流安定化電源装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11288319A (ja) * 1998-01-28 1999-10-19 Seiko Instruments Inc 電子機器
JPH11299093A (ja) * 1998-04-10 1999-10-29 Sony Corp 電源供給アダプタ、電子機器および信号伝送システム
JP2005287171A (ja) * 2004-03-29 2005-10-13 Dt Circuit Technology Co Ltd 携帯機器の電源装置、携帯機器の電源制御方法
JP2005312157A (ja) * 2004-04-20 2005-11-04 Sharp Corp 直流安定化電源装置

Similar Documents

Publication Publication Date Title
US9906059B2 (en) Charge and discharge management system and movable power source using the same
JP6203020B2 (ja) 充放電スイッチ回路を有する電池パック
JP2021503873A (ja) Ｎｆｃアンテナの電力取得装置
JP6410299B2 (ja) 無停電電源装置
TW201349697A (zh) 開關電路及具有該開關電路之電子設備
US20160363952A1 (en) Control of a series pass circuit for reducing singing capacitor noise
KR101018896B1 (ko) 평활용 커패시터의 충전 및 방전 회로
JP2006196296A (ja) 電力バックアップ装置
WO2012114984A1 (fr) Dispositif de commande de génération électrique
WO2014013854A1 (fr) Etiquette de capteur et module d'alimentation à collecte d'énergie
CN108574318B (zh) 充放电控制电路和电池装置
JP6248926B2 (ja) 半導体装置、半導体装置の電源制御方法及びセンサノード
JP4646929B2 (ja) 充電器
JP6273643B2 (ja) 充電制御装置及びそれを用いた非常用照明装置
JP6051927B2 (ja) 電源装置および無線センサネットワーク装置
JP2007282347A (ja) 電源システム
JP6177662B2 (ja) 携帯端末
MX2022008027A (es) Circuito de encendido de la bateria.
TWI451240B (zh) 供電電路
JP7205210B2 (ja) 充放電回路及び電池装置
JP2018064307A (ja) 環境発電装置及び電力供給方法
JP2003087994A (ja) 電源バックアップ回路及び逆電流消費回路
JP6020127B2 (ja) 無線通信装置
JP2019030097A (ja) 電源装置
JP3169331U (ja) Ａｃアダプタ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12749580

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12749580

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP