Hybrid vehicle power control apparatus and hybrid construction equipment using the power control apparatus
First Claim
1. A power control apparatus for a hybrid vehicle provided with an engine, a generator driven by the engine, at least one storage device, an electric motor driven by electric power supplied from at least one of the generator and the storage device, and a load operated by the motor as a drive source, the power control apparatus comprising:
- a first power converter provided between said generator and a direct-current line for converting the power outputted from the generator to DC power to output the DC power to said direct-current line;
at least one second power converter provided between said storage device and said direct-current line for converting the power outputted from said storage device to DC power to output the DC power to said direct-current line;
a motor driver electrically connected with said direct-current line for driving said motor based on the power supplied by way of the direct-current line; and
a power controller for controlling said first power converter and said second power converter to output DC power corresponding to demanded power for said load by way of said motor to said direct-current line, wherein said power controller controls said first power converter and said second power converter to maintain a voltage of said direct-current line at a substantially constant level irrespective of variation of the demanded power for said load.
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Accused Products
Abstract
A power control apparatus has a generator power converting circuit (3) for converting power from a generator (2) to DC power to output the DC power to a direct-current line (8), a battery (4), chopper circuits (5, 7) for converting power from a capacitor (6) to DC power to output the DC power to the direct-current line (8), a motor-driving circuit (9) for driving an electric motor (10) based on the power supplied by way of the direct-current line (8), and a power control circuit (23) for controlling the generator power converting circuit (3) and the chopper circuits (5, 7) in such a manner that the voltage of the DC line (8) is maintained at a substantially constant level irrespective of variation of demanded power from a load (11), whereby power just enough for the demanded power from the load (11) is supplied.
32 Citations
11 Claims
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1. A power control apparatus for a hybrid vehicle provided with an engine, a generator driven by the engine, at least one storage device, an electric motor driven by electric power supplied from at least one of the generator and the storage device, and a load operated by the motor as a drive source, the power control apparatus comprising:
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a first power converter provided between said generator and a direct-current line for converting the power outputted from the generator to DC power to output the DC power to said direct-current line;
at least one second power converter provided between said storage device and said direct-current line for converting the power outputted from said storage device to DC power to output the DC power to said direct-current line;
a motor driver electrically connected with said direct-current line for driving said motor based on the power supplied by way of the direct-current line; and
a power controller for controlling said first power converter and said second power converter to output DC power corresponding to demanded power for said load by way of said motor to said direct-current line, wherein said power controller controls said first power converter and said second power converter to maintain a voltage of said direct-current line at a substantially constant level irrespective of variation of the demanded power for said load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification