Hybrid power supply system
First Claim
1. A hybrid power supply system, comprising:
- system voltage lines which are connected to a load;
an energy type power supply device connected to the system voltage lines;
a power type power supply device connected to the system voltage lines;
system voltage control means having a voltage controller that change the voltage of the power type power supply device by changing the voltage of the system voltage lines, and thus allow electric power to be outputted from the power type power supply device to the system voltage lines and electric power to be absorbed by the power type power supply device from the system voltage lines;
an additional energy type power supply device which is provided separately from the energy type power supply device in order to supply electric power to an input terminal of the voltage controller; and
a power supply defect detector that detects a defect in the electric power supply capacity of the energy type power supply device,wherein, when the defect is detected by the power supply defect detector, the system voltage control means disconnects the defective energy type power supply device from use so that the output voltage of the voltage controller then operates under the electric power from the additional power supply device that is applied to the system voltage lines directly.
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Accused Products
Abstract
It is an object of the present invention to provide a high efficiency hybrid power supply system that permits a power type power supply device such as a capacitor to be utilized effectively, and that makes it possible to even the burden on an energy type power supply device such as a storage cell. A capacitor 21 is connected to system voltage lines 26 and 27 which are connected to a load 30, and a body formed by a serial connection between a large-capacity storage cell 22 and the output terminal of a voltage controller 23 is connected in parallel with this capacitor 21. The voltage Vb of the storage cell 22 is substantially constant. The voltage controller 23 is a DC/DC converter, for example, the output voltage Vv of which is variable. A system controller 25 changes the system voltage Vs by changing the output voltage Vv of the voltage controller 23. When a large amount of electric power is to be supplied to the load 30, energy is rapidly discharged from the capacitor 21 and supplied to the load 30 by lowering the system voltage Vs. When a large amount of electric power is to be fed back from the load 30, energy from the load 30 is rapidly absorbed by the capacitor 21 by raising the system voltage Vs.
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Citations
12 Claims
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1. A hybrid power supply system, comprising:
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system voltage lines which are connected to a load; an energy type power supply device connected to the system voltage lines; a power type power supply device connected to the system voltage lines; system voltage control means having a voltage controller that change the voltage of the power type power supply device by changing the voltage of the system voltage lines, and thus allow electric power to be outputted from the power type power supply device to the system voltage lines and electric power to be absorbed by the power type power supply device from the system voltage lines; an additional energy type power supply device which is provided separately from the energy type power supply device in order to supply electric power to an input terminal of the voltage controller; and a power supply defect detector that detects a defect in the electric power supply capacity of the energy type power supply device, wherein, when the defect is detected by the power supply defect detector, the system voltage control means disconnects the defective energy type power supply device from use so that the output voltage of the voltage controller then operates under the electric power from the additional power supply device that is applied to the system voltage lines directly. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hybrid power supply system, comprising:
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system voltage lines which are connected to a load; an energy type power supply device connected to the system voltage lines; a power type power supply device connected to the system voltage lines; and system voltage control means having a voltage controller that change the voltage of the power type power supply device by changing the voltage of the system voltage lines, and thus allow electric power to be outputted from the power type power supply device to the system voltage lines and electric power to be absorbed by the power type power supply device from the system voltage lines, wherein the system voltage control means reduce the system voltage when electric power is applied to the load, and raise the system voltage when electric power is fed back from the load.
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8. A hybrid power supply system, comprising:
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output terminals; a serial/parallel chopper circuit that comprises a plurality of energy type power supply devices and switching elements, which serial/parallel chopper circuit causes the plurality of energy type power supply devices to be alternately connected in series and in parallel between the output terminals as a result of the ON/OFF operation of the switching elements, and outputs the output voltage to the output terminals, this output voltage being at a level that corresponds to the duty of the switching elements; a power type power supply device connected between the output terminals; and a controller that performs an ON/OFF operation by driving the switching elements of the serial/parallel chopper circuit and increases/decreases the level of the output voltage by controlling the duty of the switching elements. - View Dependent Claims (9, 10, 11, 12)
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Specification