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Electricity-storage device that can output alternating current
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A technology of accumulator and output voltage, applied in the direction of converting AC power input into DC power output, output power conversion device, collector, etc., can solve problems such as increased loss
Active Publication Date: 2015-04-29
JAPAN AEROSPACE EXPLORATION AGENCY +1
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Abstract
Description
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Problems solved by technology
In this case, there will be a problem of increased loss due to operating the DC-DC converter with a wide range of input voltages
Method used
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Embodiment 1
[0112] Configuration of the power storage device 1
[0113] figure 2 It is a circuit diagram of the power storage device 1 capable of AC output according to the first embodiment of the present invention. The power storage device 1 is composed of the following components: a balancing circuit 2; a power storage module group 3 that connects n power storage modules (hereinafter referred to as capacitors) C in series 1 to C n And constitute; switch group 4, it is by n switches SW 1 to SW n Constituted; And positive and negative reverse circuit 5, it comprises switch a1 , IS a2 , IS b1 , IS b2 ; And it is configured to apply a voltage to the load 6 with a desired magnitude and polarity. In addition, the load 6 is not limited to a resistor, and arbitrary components, modules, and devices that operate by electric power may be used. In addition, A and B in the figure correspond to connection points of the input part of the forward-inverting-inverting circuit 5 .
[0114] The ...
Embodiment 2
[0160] Configuration of the power storage device 1
[0161] Figure 7 It is a circuit diagram of a power storage device 1 capable of AC output according to a second embodiment of the present invention. and figure 1 The electrical storage device 1 is different, and does not include the forward-inverting and inverting circuit 5, and the forward-inverting and inverting control circuit 11. On the other hand, the switch group 4 is composed of the following components: the first switch group 12, which consists of SW 1a to SW n +1a constituted; and the second switch group 13, which consists of SW 1b to SW n+1b constituted.
[0162] Each switch SW of the first switch group 12 1a to SW n+1a Configured on the link capacitor C 1 to C n In the path between any one of the terminals and the connection point A in the power storage device 1 . Each switch SW of the second switch group 13 1b to SW n+1b Configured on the link capacitor C 1 to C n In the path between any one of the...
Embodiment 3
[0182] Configuration of the power storage device 1
[0183] Figure 12 It is a circuit diagram of a power storage device 1 having a regenerative function according to a third embodiment of the present invention. Compared to figure 2 The electrical storage device is constructed by adding a load voltage detection circuit 14, a comparison feedback circuit 15, and a regenerative switch control circuit 16.
[0184] use Figure 12 Even if the load voltage deviates from the target voltage value which is the voltage obtained by multiplying the reference waveform signal voltage by the set magnification value, the electric storage device 1 can correct the deviated state, and the load 6 can be adjusted corresponding to the deviated voltage. The remaining energy of the capacitor is regenerated in the capacitor, so that the voltage drop of the capacitor can be compensated to some extent.
[0185] Operation of power storage device 1
[0186] In the description pass Figure 12 Before ...
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Abstract
Provided is an electric energy storage apparatus capable of generating an AC output in a low-loss and low-noise manner without using a DC-DC converter or an inverter. The electric energy storage apparatus comprises: an electric energy storage module group formed by connecting in series two or more electric energy storage modules each comprising one or more electric energy storage elements; a balancing circuit electrically connected to the electric energy storage module group and configured to adjust a voltage to be applied to each of the electric energy storage modules; a first switch group comprising two or more switches each provided in a path connecting a first terminal and a terminal of one of the series-connected electric energy storage modules; and a second switch group comprising two or more switches each provided in a path connecting a second terminal and a terminals of one of the series-connected electric energy storage modules. The electric energy storage apparatus is configured to perform a switch changeover in the first and second switch groups so as to select a magnitude and polarity of an output voltage depending on a configuration of the electric energy storage elements present in a path connecting the first and second terminals.
Description
technical field [0001] The present invention relates to electrical storage devices. More specifically, the present invention relates to an electric storage device capable of performing AC output with low loss and low noise without using a DC-DC converter or an inverter. Background technique [0002] As an example of a power supply for generating AC voltage, there is a system in which a voltage held by a power storage device such as a capacitor is converted using a DC-DC converter and an inverter. [0003] The general circuit configuration of such an AC power supply is shown in figure 1 . The power storage device is composed of power storage means-discharging means-DC / DC converter-inverter. [0004] In general, when some kind of electronic device is operated by electric power, it is necessary to supply power within a predetermined operating voltage range determined according to the characteristics of the device. The reason for this is that electronic devices operate withi...
Claims
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Application Information
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