Charge control apparatus, electrically powered vehicle and electric storage charge control method
First Claim
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1. A charge control apparatus for charging an electric storage, comprising:
- a star-connected first poly-phase winding;
a star-connected second poly-phase winding;
a power input unit connected to a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding, and applying an AC power from an external power source to said first and second neutral points;
a power converting apparatus converting to a DC power, the AC power from said external power source applied to said first and second neutral points and outputting said DC power to a DC power line;
a converter lowering a voltage from said DC power line to charge said electric storage, while controlling the voltage of said DC power line to be not lower than a voltage of said electric storage, in accordance with an applied command; and
converter control means for setting a control target of the voltage of said DC power line based on a voltage level of said external power source, and outputting said command for controlling the voltage of said DC power line to said control target, to said converter.
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Abstract
When it is determined that an electric storage is to be charged from a commercial power source, a controller sets a control target of a voltage of a power line to be controlled by a boost converter, based on a voltage of the commercial power source. Specifically, the controller sets the control target of the voltage to a level approximately equal to the crest value of voltage. Then, the controller outputs an input permission command to a relay circuit, and controls inverters to execute charging of the electric storage.
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Citations
14 Claims
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1. A charge control apparatus for charging an electric storage, comprising:
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a star-connected first poly-phase winding; a star-connected second poly-phase winding; a power input unit connected to a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding, and applying an AC power from an external power source to said first and second neutral points; a power converting apparatus converting to a DC power, the AC power from said external power source applied to said first and second neutral points and outputting said DC power to a DC power line; a converter lowering a voltage from said DC power line to charge said electric storage, while controlling the voltage of said DC power line to be not lower than a voltage of said electric storage, in accordance with an applied command; and converter control means for setting a control target of the voltage of said DC power line based on a voltage level of said external power source, and outputting said command for controlling the voltage of said DC power line to said control target, to said converter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric vehicle, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; a driving wheel mechanically linked to a rotation shaft of at least one of said first and second poly-phase AC electric motors; first and second inverters respectively provided corresponding to said first and second poly-phase AC electric motors; an electric storage; a converter provided between said electric storage and a DC power line connected to each of said first and second inverters, controlling a voltage of said DC power line to be not lower than a voltage of said electric storage; a controller controlling said first and second inverters and said converter; and a power input unit connected to a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding, and applying an AC power from an external power source to said first and second neutral points;
whereinsaid controller includes inverter control means for controlling, when the AC power from said external power source is applied to said first and second neutral points, said first and second inverters in a coordinated manner, so that the AC power is converted to a DC power and output to said DC power line, and converter control means for setting, when the AC power from said external power source is applied to said first and second neutral points, a control target of the voltage of said DC power line based on a voltage level of said external power source, and for controlling said converter such that said electric storage is charged while the voltage of said DC power source is adjusted to said control target.
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8. A method of charge control for charging an electric storage by a charger, wherein
said charger includes a star-connected first poly-phase winding, a star-connected second poly-phase winding, a power input unit connected to a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding, and applying an AC power from an external power source to said first and second neutral points, a power converting apparatus converting to a DC power, the AC power from said external power source applied to said first and second neutral points and outputting said DC power to a DC power line, and a converter lowering a voltage from said DC power line to charge said electric storage, while controlling the voltage of said DC power line to be not lower than a voltage of said electric storage, in accordance with a set control target; -
said method comprising; a first step of detecting a voltage level of said external power source; and a second step of setting said control target based on the detected voltage level. - View Dependent Claims (9, 10)
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11. A charge control apparatus for charging an electric storage, comprising:
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a star-connected first poly-phase winding; a star-connected second poly-phase winding; a power input unit connected to a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding, and applying an AC power from an external power source to said first and second neutral points; a power converting apparatus converting to a DC power, the AC power from said external power source applied to said first and second neutral points and outputting said DC power to a DC power line; a converter lowering a voltage from said DC power line to charge said electric storage, while controlling the voltage of said DC power line to be not lower than a voltage of said electric storage, in accordance with an applied command; and a controller executing a series of operations;
whereinsaid controller sets a control target of the voltage of said DC power line based on a voltage level of said external power source; and
outputs said command for controlling the voltage of said DC power line to said control target, to said converter. - View Dependent Claims (12, 13, 14)
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Specification