US20010028573A1 - Electric power system - Google Patents
Electric power system Download PDFInfo
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- US20010028573A1 US20010028573A1 US09/803,938 US80393801A US2001028573A1 US 20010028573 A1 US20010028573 A1 US 20010028573A1 US 80393801 A US80393801 A US 80393801A US 2001028573 A1 US2001028573 A1 US 2001028573A1
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- voltage
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- conversion
- capacitors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
Description
- The present invention relates to an electric power system.
- A conventional battery protective circuit for secondary batteries connected in series is disclosed in Japanese laid-open Patent Publication Hei 8-78060.
- FIG. 11 is a view showing the conventional battery protective circuit. In FIG. 11,
reference numerals 1101 indicate secondary batteries, 1102 voltage detection circuits, 1103 resistors, 1104 comparators, and 1105 an FET. - The two
secondary batteries 1101 are connected in series and thevoltage detection circuits 1102 are connected across the respectivesecondary batteries 1101. To each input of thecomparators 1104, a reference voltage by the divided voltage of theresistors 1103 connected in series and the output of thevoltage detection circuits 1102 are connected respectively. - Both output of the
comparators 1104 are connected to the gate of the FET 1105 inserted in series with thesecondary batteries 1101. - The
voltage detection circuits 1102 detect the voltages of thesecondary batteries 1101 respectively and thecomparators 1104 compare the detected value with the reference voltage by the divided voltage of resistor. When any of thesecondary batteries 1101 is fully charged and the detected value of any of thevoltage detection circuits 1102 is more than the reference voltage, the output of any of thecomparators 1104 becomes low revel, and theFET 1105 is turned off, and the charging is stopped. - The conventional battery protective circuit requires the exclusive
voltage detection circuits 1102 respectively for the twosecondary batteries 1101 connected in series. The reason is that the potential levels of the detected values of thevoltage detection circuits 1102 are different from each other on the basis of the lowest negative terminal of thesecondary batteries 1101 connected in series. - The
voltage division resistors 1103 must be also installed exclusively for thesecondary batteries 1101 respectively. - The values of the
resistors 1103 are always varied from the nominal value within a certain range in the production process, so that the reference value for specifying full charging is also varied and the precision of the reference voltage is lowered. - Further, to make the different potential levels of detected values of the
voltage detection circuits 1102 equal by level-shifting, thecomparators 1104 must be installed exclusively for thesecondary batteries 1101 respectively. Moreover, the withstand voltages of thecomparators 1104 must be equal to the total voltage of the batteries connected in series. - Even if a circuit fulfills the same function for each of the secondary batteries like this, a circuit fit to each potential level is required for each of the secondary batteries. Accordingly, assuming that a plurality of
batteries 1101 are additionally connected in series, the number of circuits increases and the cost, size, and power consumption also increase. Parts of thecomparators 1104 having a withstand voltage meeting the total voltage of the batteries connected in series do not exist actually and it is difficult to realize this circuit. - The electric power system of the present invention has a plurality of capacitors connected in series, a plurality of DC-AC conversion circuits for converting and outputting each DC voltage of the plurality of capacitors to an AC signal that an AC component equivalent to the inter-terminal DC voltage of each of the capacitors is superimposed on the each DC voltage, a plurality of condenser couplers for breaking the each DC voltage from each output of the plurality of AC-DC conversion circuits and outputting the AC components respectively, and a processing circuit for selecting each output of the plurality of condenser couplers and detecting the inter-terminal DC voltage of the corresponding capacitor from the selected AC component.
- The electric power system of the present invention has a plurality of capacitors connected in series, a plurality of DC-AC conversion circuits for converting and outputting each DC voltage of the plurality of capacitors to an AC signal that an AC component equivalent to the inter-terminal DC voltage of each of the capacitors is superimposed on the each DC voltage, a plurality of condenser couplers for breaking the each DC voltage from each output of the plurality of DC-AC conversion circuits and outputting the AC components respectively, a processing circuit for selecting each output of the plurality of condenser couplers, converting the selected AC component to a digital signal, and detecting the inter-terminal DC voltage of the corresponding capacitor from the digital signal, wherein the processing circuit has a selection circuit for selecting output from the plurality of condenser couplers, an A-D conversion circuit for converting the selected AC component to a digital signal, and a microcomputer for detecting the inter-terminal DC voltage of the corresponding capacitor from the digital signal.
- The present invention is an electric power system, wherein the processing circuit has an AC-DC conversion circuit for converting the AC component selected by the selection circuit to a DC voltage which is full-wave rectified and supplies the converted DC voltage to the A-D conversion circuit.
- The present invention is an electric power system wherein the plurality of DC-AC conversion circuits have a plurality of control power sources for outputting a voltage higher than the inter-terminal voltage of the plurality of capacitors and perform the conversion operation of the plurality of DC-AC conversion circuits by the output of the plurality of control power sources.
- The present invention is a electric power system, wherein the control circuit has a plurality of voltage control voltage sources for outputting a voltage proportional to the inter-terminal voltage of each capacitor of the plurality of capacitors and the output of the plurality of voltage control voltage sources is used as a power source of the AC-DC conversion circuit, and wherein the control circuit has a storage circuit for storing a correction formula and the output of the A-D conversion circuit is correction-operated by the microcomputer on the basis of the storage contents of the storage circuit.
- The present invention is a electric power system, wherein each circuit of at least a part of the DC-AC conversion circuit, condenser coupler, and control circuit is enclosed by each insulating trench formed on the substrate.
- FIG. 1 is a circuit diagram showing the first embodiment of the electric power system of the present invention;
- FIG. 2 is a circuit diagram showing the second embodiment of the present invention;
- FIGS. 3a to 3 d are waveforms showing the operations of FIGS. 1 and 2;
- FIG. 4 is a circuit diagram showing the third embodiment of the present invention;
- FIG. 5 is a circuit diagram showing the fourth embodiment of the present invention;
- FIG. 6 is a circuit diagram showing the fifth embodiment of the present invention;
- FIG. 7 is a view showing a substrate an IC of the sixth embodiment of the present invention;
- FIG. 8 is a sectional view of FIG. 7;
- FIG. 9 is a circuit diagram showing an seventh embodiment of a sunlight power converter to which the present invention is applied;
- FIG. 10 is a circuit diagram showing an embodiment of a part of an automobile to which the present invention is applied;
- FIG. 11 is a circuit diagram showing a conventional battery protective circuit.
- Embodiments of the invention are explained using drawings in detail. Like reference numerals designate like parts throughout the drawings.
- (Embodiment 1)
- FIG. 1 is a circuit diagram showing the first embodiment of the electric power system of the present invention. In FIG. 1,
reference numeral 100 indicates an electric device, 101 a, 101 b, 101 c, and 101 d capacitors, 102 a, 102 b, 102 c, and 102 d DC-AC conversion circuits, 103 a, 103 b, 103 c, and 103 d condenser couplers, and 104 a processing circuit.Reference numeral 105 indicates a selection circuit, 106 an A-D conversion circuit, 107 a microcomputer, and 108 a, 108 b, 108 c, and 108 d condenser couplers. - In the present embodiment, the plurality of
capacitors AC conversion circuits capacitors AC conversion circuits selection circuit 105 of theprocessing circuit 104 via thecondenser couplers selection circuit 105 is connected to theA-D conversion circuit 106 and theA-D conversion circuit 106 is connected to themicrocomputer 107. A control signal is output from themicrocomputer 107 controls the conversion operation of the DC-AC conversion circuits condenser couplers microcomputer 107. - Both ends of the
capacitors electric device 100 and transmit and receive power. The output of themicrocomputer 107 of theprocessing circuit 104 is connected to theelectric device 100 and transmits the DC voltage condition of thecapacitors electric device 100. Upon receipt of it, theelectric device 100 controls transmission and reception of the power. - In this case, the
electric device 100 is a second power system (different power system), a motor system for an elevator or an automobile, and a general electrical apparatus. - The
capacitors - The DC-
AC conversion circuits capacitors capacitors - The DC-
AC conversion circuits microcomputer 107 via thecondenser couplers - A control signal, for example, as shown in FIG. 3a, is changed to an AC voltage that an AC component is superimposed on a DC voltage through the
condenser couplers capacitors AC conversion circuits - The
condenser couplers - The
processing circuit 104 receives the output of the DC-AC conversion circuits selection circuit 105 and selects one output AC component among them by a control signal from themicrocomputer 107. It may manually switch select the output of the DC-AC conversion circuits. - One output AC component of the
selection circuit 105 is converted to a digital signal by theA-D conversion circuit 106, input to themicrocomputer 107. Themicrocomputer 107 detects the inter-terminal voltage of thecapacitors - Therefore, according to this embodiment, the DC-
AC conversion circuits capacitors capacitors processing circuit 104 via thecondenser couplers capacitors - Further, the DC-
AC conversion circuits condenser couplers capacitors - Accordingly, it is possible to realize common use of the
processing circuit 104 including voltage detection for thecapacitors - (Embodiment 2)
- FIG. 2 is a circuit diagram showing the second embodiment of the power system of the present invention. In FIG. 2, the difference from the first embodiment shown in FIG. 1 is that an AC-
DC conversion circuit 203 is newly installed between theselection circuit 105 and theA-D conversion circuit 106. The AC-DC conversion circuit 203 is composed of aninversion circuit 204, aswitch 205, and aCR filter 206. - The
inversion circuit 204 inverts one output AC component of theselection circuit 105 positive and negative. Theswitch 205 selects the inverted value and non-inverted value alternately and for example, as shown in FIG. 3d, rectifies the full-wave. TheCR filter 206 smoothes the oscillating component of the full-wave. In this way, the AC-DC conversion circuit 203 restores one output AC component of thecondenser coupler 103 to a direct current. - Therefore, according to this embodiment of the present invention, a more precise inter-terminal voltage of the
capacitors - (Embodiment 3)
- FIG. 4 is a circuit diagram showing the third embodiment of the electric power system of the present invention. In FIG. 4,
reference numeral 401 a indicates a power circuit and 402 a indicates a control power source. - The
power circuit 401 a is composed of a boot strap circuit including thecondenser coupler 108 a and outputs an voltage higher than the inter-terminal voltage of thecapacitor 101 a. - In this case, the DC-
AC conversion circuit 102 a is composed of a multiplexer circuit and has thecontrol power source 402 a. Thecontrol power source 402 a is connected to thepower circuit 401 a. - The input-output voltage of the multiplexer circuit is generally lower than the voltage of the control power source. When the control power source is changed, the input-output characteristics (voltage transfer characteristics such as rise time and breaking time) are changed.
- Meanwhile, the AC-
DC conversion circuit 203 selects the inverted value and non-inverted value of thecondenser coupler 103 a alternately and rectifies the full-wave, so that when the voltage transfer characteristics of the DC-AC conversion circuit 102 are changed, an error is caused at the time of conversion to a DC voltage. - Therefore, in this case, even when another
power circuit 401 a is installed, and a voltage is supplied to thecontrol power source 402 a, and the voltage of thecapacitor 101 a is changed, the voltage transfer characteristics of the DC-AC conversion circuit 102 are kept unchanged. Therefore, the AC-DC conversion operation of the AC-DC conversion circuit 203 is stabilized. According to this, the DC-AC conversion circuit 102 a can convert the inter-terminal voltage information of thecapacitor 101 a stably and precisely. - In FIG. 4, the
power circuit 401 a is composed of a boot strap circuit. However, it may be composed of a switching power source using an insulating transformer. - In FIG. 4, only the
capacitor 101 a is shown as a representative. However, as shown in FIGS. 1 and 2, the capacitors are composed of four capacitors of 101 a, 101 b, 101 c, and 101 d connected in series, and theother capacitors - (Embodiment 4)
- FIG. 5 is a circuit diagram showing the fourth embodiment of the power unit of the present invention. In FIG. 5,
reference numeral 501 a indicates a voltage control voltage source and 502 a indicates an AC-DC conversion circuit power source. - The
control circuit 104 includes the voltagecontrol voltage source 501 a. In FIG. 5, the voltagecontrol voltage source 501 a is shown as a switching power source using an insulating transformer. However, it may be realized by an insulating amplifier. The primary side at one end is connected to thecapacitor 101 a. However, it may be connected between both terminals of the train ofcapacitors 101 connected in series. - The voltage
control voltage source 501 a outputs a voltage corresponding to the inter-terminal voltage of thecapacitor 101 a. The output thereof is supplied to the AC-DC conversion circuit power source 502 a of the AC-DC conversion circuit 203. - The
switch 205 of the AC-DC conversion circuit 203 is composed of the same multiplexer as that of the DC-AC conversion circuit 102 a and the control power source thereof is supplied from the voltagecontrol voltage source 501 a. - Here, the control power source402 of the DC-
AC conversion circuit 102 a is connected to thecapacitor 101 a. Therefore, when the inter-terminal voltage of thecapacitor 101 a is changed, the voltage transfer characteristics of the DC-AC conversion circuit 102 a are changed and the AC-DC conversion operation of the AC-DC conversion circuit 203 is unstabilized. - A voltage cooperated to the power source of the DC-
AC conversion circuit 102 a is also supplied to the AC-DC conversion circuit 203 so as to make the voltage transfer characteristics of the two coincide with each other, thereby stabilization of the AC-DC conversion operation is realized. - In the case, the power source in proportional to that of the DC-
AC conversion circuit 102 a is supplied to the AC-DC conversion circuit 203, for example. Additionally, it is possible to install the same number of the voltage control voltage source as the number of thecapacitor 101 a and arrange a sector between the AC-DC conversion circuit power source 502 a and a voltagecontrol voltage source 501 a and arrange a sector between the output ofmicrocomputer 107 and eachcondenser coupler 201 a. - (Embodiment 5)
- FIG. 6 is a circuit diagram showing the fifth embodiment of the present invention. In FIG. 6,
reference numeral 602 indicates a storage circuit. Thevoltage detection circuit 107 and thestorage circuit 602 are connected to themicrocomputer 107. - The
storage circuit 602 stores a voltage transfer error and an error correction formula of the path from the DC-AC conversion circuit 102 a to theA-D conversion circuit 106 beforehand. Themicrocomputer 107 carries out correction operations on the value of a digital signal of theA-D conversion circuit 106 on the basis of the storage contents of thestorage circuit 602. - According to this, the inter-terminal voltage of the
capacitor 101 a can be accurately detected and the reliability of the electric power system can be improved. - The
storage circuit 602 may be any of a mask ROM, EPROM, flash memory and battery-back-up SRAM. It may be a separate semiconductor chip other than themicrocomputer 107 or may be formed on a same semiconductor chip. - (Embodiment 6)
- FIG. 7 is a view showing a substrate of a sixth embodiment that the respective circuits of the first to fifth embodiments of the electric power system of the present invention are integrated. In FIG. 7,
reference numeral 701 indicates an SOI (silicon on insulator) substrate, 702 an insulating trench, and 703 a bonding pad. - The insulating
trench 702 is formed by filling a groove formed inside theSOI substrate 701 with an insulator such as SiO2. The DC-AC conversion circuits 102 a,thecondenser couplers control circuit 104 integrated on thesame SOI substrate 701 are enclosed by the insulatingtrench 702. - According to this embodiment, each circuit can be electrically insulated by the
condenser coupler 103. Therefore, Each circuit can be low withstand voltage and the embodiment is suitable for the constitution to insulate the circuits from each other by the insulatingtrench 702. - FIG. 8 is a sectional view indicated by an arrow A in FIG. 7. In FIG. 8,
reference numeral 801 indicates an insulating layer, 802 a semiconductor layer, and 803 a protective layer. Thesemiconductor layer 802 is divided by a plurality of insulatingtrenches 702 and the area of the DC-AC conversion circuit 102, the area of thecondenser couplers 103 and 201, and the area of thecontrol circuit 104 are arranged from the left. - In this structure, the
SOI substrate 701 having the insulatinglayer 801 of SiO2 with a width of about 2 microns as an inner layer is prepared and each area is prepared on it using the thin film process using a photomask. - The SOI substrate has a constitution that a multiple insulating
layer 801 of one layer of SiO2 or additionally a polysilicon layer having an oxidized surface overlaid is overlaid on a single-crystal silicon substrate and furthermore a single-crystal silicon semiconductor layer is overlaid. Lamination uses a method for mirror-polishing and overlaying the surface of a silicon oxide film on the polysilicon surface and then bonding them by heat-treating at a specific temperature. - The insulating
trench 702 is formed by a method for cutting a trench once and filling it with SiO2 or BPSG(Boro-Phospho Siicate Glass), a method for oxidizing the trench wall thinly and filling the trench with polysilicon, a method for coating polyimide resin or SOG(Spin-On Glass), or a method for irradiating oxygen ions from the top and changing the semiconductor layer to an insulating material. - The
protective layer 803 is an insulator of SiO2, HLD(High Temperature Low pressure ecomposition Films), or SiN and includes a wiring layer of polysilicon or aluminum. - When folding the trench with 1.5 microms width and 15 microms depth and arranging in a square of about 160 microms, this embodiment can obtain an insulating property of about 2 pF per a square of about 160 microns and a withstand voltage of about 750 V per one insulating
trench 702 in the DC withstand voltage test. When forming a pattern of the insulatingtrench 702, to prevent an acute-angled pattern, a circular arc pattern (a radius of 2 to 5 microns) as far as possible is used at a folding part or corner. By doing this, the withstand voltage by electric field concentration can be prevented from reduction. - In the embodiment, a plurality of circuits are physically insulated from the
SOI substrate 701 by the insulatingtrench 702 and the insulatinglayer 801, so that it is possible to directly bond the semiconductor chip to the frame at the time of package mounting and dissipates heat satisfactorily. Further, although an IC having a multi-layer structure is warped not a little, the thickness of each layer can be adjusted by using an insulating multi-layer, thereby an effect of dispersion of stress and reducing in warp can be produced. - Here, assuming that the
capacitors 101 are a module battery that 10 nickel-hydrogen batteries are connected in series and the nominal electromotive voltage is 12 V, the withstand voltage of DC-AC conversion circuit 102 is set to about 18 V with a margin. The withstand voltage of thecontrol circuit 104 is about 5 V. The voltage when 25 module batteries mentioned above are connected in series is 300 V, which is sufficiently lower than the insulating property of the insulatingtrench 702. Therefore, thecondenser couplers 103 and 201 and the other circuits can be integrated on theSOI substrate 701. - Since the aforementioned units can be integrated on the
SOI substrate 701, a reliable power unit which is characterized in few parts, low cost, small size, low power consumption, high control precision, and high noise margin can be realized. - (Embodiment 7)
- FIG. 9 is a circuit diagram showing an seventh embodiment of the present invention. In FIG. 9,
reference numeral 901 indicates a commercial power source, 902 a sunlight generating set, 903 a load device, 904 a control converter, and 905 a change-over device. - In FIG. 9, the electric power system is the same structure as the embodiment 1 to 6, and the plurality of capacitors101are connected in series, and the DC-
AC conversion circuits 102 are respectively connected to both ends of each of thecapacitors 101, and the output thereof is connected to theselection circuit 105 of thecontrol circuit 104, the AC-DC conversion circuit 203, thevoltage detection circuit 106, themicrocomputer 107, and thestorage circuit 602 via thecondenser couplers 103. - The
control converter 904 is connected to both ends of the train of thecapacitors 101 and themicrocomputer 601 in thecontrol circuit 104 and the MCU in thecontrol converter 904 are connected. - Furthermore, the sunlight generating set902, the
load device 903, and thecontrol converter 904 are respectively connected to the commoncommercial power source 901 via the change-overdevice 905. At the same time, the sunlight generating set 902, theload device 903, thecontrol converter 904, the change-overdevice 905, and thecontrol circuit 104 are connected via two-way communication. - The sunlight generating set902 is a device for converting the sunlight to DC power by a solar battery and outputting AC power by an inverter device.
- The
load device 903 is a household electric appliance such as an air conditioner, refrigerator, microwave oven, or lighting fixture, an electrical appliance such as a motor, elevator, computer, or medical appliance, or a second power unit. Thecontrol converter 904 is a charger-discharger for converting AC power to DC power or converting DC power to AC power. It serves as a controller for controlling charge and discharge and controlling the sunlight generating set 902 and theload device 903 mentioned above. - Each of these devices may have the change-over
device 905 in the own device. The power unit of the present invention can be connected to thecontrol converter 904 having a different constitution from that shown in the drawing and the other devices. - According to this embodiment, when the power required by the
load device 903 cannot be supplied by thecommercial power source 901 or the sunlight generating set 902, power is supplied from thecapacitor 101 via thecontrol converter 904. When power supply form thecommercial power source 901 or the sunlight generating set 902 is excessive, unnecessary power is stored in thecapacitor 101 via thecontrol converter 904. - During the aforementioned operation, when the inter-terminal voltage of the
capacitor 101 reaches the discharge stop level or charge stop level, thecontrol circuit 104 transmits a signal indicating it to thecontrol converter 904 and thecontrol converter 904 controls charging or discharging. - In the aforementioned embodiments, the contract demand and power consumption of the
commercial power source 901 and the power generation rating of the sunlight generating set 902 can be lowered and the equipment cost and running cost can be reduced. - When power consumption is concentrated in a certain time zone, the
capacitor 101 supplies power to thecommercial power source 901 and when power consumption is little, the power unit stores power, thus concentration of the power consumption is moderated and the power consumption can be averaged. - Furthermore, the
control converter 904 monitors the power consumption of theload device 903 and controls theload device 903, so that energy conservation and effective utilization of power can be realized. - FIG. 10 is a circuit diagram showing an embodiment of a part of an automobile to which an embodiment of the power unit of the present invention is applied. In FIG. 10,
reference numeral 1001 indicates an alternator and 1002 indicates a DC load device. FIG. 10 is an extract of a part of the constitution. - The
alternator 1001 is connected to the train of thecapacitors 101 a,—via thecontrol converter 904. - The
alternator 1001 executes engine start, assistance of the drive force (motoring), and power generation (generation). During motoring, the train of thecapacitors 101 supplies power to thealternator 1001 via thecontrol converter 904. During generation, thealternator 1001 inversely supplies power to the train of thecapacitors 101 via thecontrol converter 904. - The
DC load device 1002 is an electric load such as a solenoid valve or audio unit or a second power unit such as a lead battery. TheDC load device 1002 is connected to the train of thecapacitors 101 via the change-overdevice 905. - By doing this, an automobile for assisting the engine torque at the time of departure and converting and storing the kinetic energy to power at the time of application of the break can be realized.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2000-076335 | 2000-03-14 | ||
JP2000076335A JP3505122B2 (en) | 2000-03-14 | 2000-03-14 | Power supply |
Publications (2)
Publication Number | Publication Date |
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US20010028573A1 true US20010028573A1 (en) | 2001-10-11 |
US6430066B2 US6430066B2 (en) | 2002-08-06 |
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Application Number | Title | Priority Date | Filing Date |
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US09/803,938 Expired - Fee Related US6430066B2 (en) | 2000-03-14 | 2001-03-13 | Electric power system having series connected capacitor |
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US (1) | US6430066B2 (en) |
EP (1) | EP1134871B1 (en) |
JP (1) | JP3505122B2 (en) |
KR (1) | KR20010089252A (en) |
CA (1) | CA2340312A1 (en) |
DE (1) | DE60139653D1 (en) |
TW (1) | TW533613B (en) |
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KR100326104B1 (en) * | 1997-08-04 | 2002-10-11 | 가부시끼가이샤 도시바 | Control method of power converter |
JP3796918B2 (en) * | 1997-09-30 | 2006-07-12 | 株式会社デンソー | Battery device |
US6031738A (en) * | 1998-06-16 | 2000-02-29 | Wisconsin Alumni Research Foundation | DC bus voltage balancing and control in multilevel inverters |
-
2000
- 2000-03-14 JP JP2000076335A patent/JP3505122B2/en not_active Expired - Fee Related
-
2001
- 2001-03-09 CA CA002340312A patent/CA2340312A1/en not_active Abandoned
- 2001-03-12 EP EP01105417A patent/EP1134871B1/en not_active Expired - Lifetime
- 2001-03-12 DE DE60139653T patent/DE60139653D1/en not_active Expired - Lifetime
- 2001-03-13 KR KR1020010012817A patent/KR20010089252A/en active IP Right Grant
- 2001-03-13 US US09/803,938 patent/US6430066B2/en not_active Expired - Fee Related
- 2001-03-13 TW TW090105858A patent/TW533613B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2001258170A (en) | 2001-09-21 |
DE60139653D1 (en) | 2009-10-08 |
KR20010089252A (en) | 2001-09-29 |
EP1134871A3 (en) | 2005-04-06 |
EP1134871B1 (en) | 2009-08-26 |
CA2340312A1 (en) | 2001-09-14 |
EP1134871A2 (en) | 2001-09-19 |
JP3505122B2 (en) | 2004-03-08 |
US6430066B2 (en) | 2002-08-06 |
TW533613B (en) | 2003-05-21 |
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