BATTERY CHARGING APPARATUS FOR VEHICLE
First Claim
1. A battery charging apparatus for a vehicle, comprising:
- a driver unit that converts three-phase AC power outputted from a winding of each phase of a stator of a three-phase AC generator into DC power using a plurality of switching elements to supply the DC power to a battery;
a control unit that controls switching between an energized state and non-energized state of each of the plurality of switching elements; and
a position detection unit that outputs a position detection signal indicating a position of a rotor of the three-phase AC generator,the control unit obtaining a next estimation power generation period of the three-phase AC generator on the basis of the previous position detection signal and determining a next energization period of each of the plurality of switching elements on the basis of the estimation power generation period,wherein the control unit judges start of the energization period on the basis of input of the position detection signal, and, if a period until next input of the position detection signal exceeds the energization period, during the period until the next input of the position detection signal, the control unit has a maintenance period in which the plurality of switching elements are maintained in the energized state or non-energized state immediately before the period until the next input of the position detection signal exceeds the energization period.
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Accused Products
Abstract
A battery charging apparatus for a vehicle includes a driver, a position detector, and a controller. The driver includes switching elements to convert three-phase AC power outputted from a winding of each phase of a stator of a three-phase AC generator into DC power to supply the DC power to a battery. The position detector is configured to output a position detection signal indicating a position of a rotor of the three-phase AC generator. The controller is configured to control the switching elements to be switched between an energized state and non-energized state. The controller is configured to have a maintenance period during a period until next input of the position detection signal if the period exceeds an energization period. The switching elements are to be maintained in the maintenance period in the energized state or non-energized state immediately before the period exceeding the energization period.
141 Citations
24 Claims
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1. A battery charging apparatus for a vehicle, comprising:
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a driver unit that converts three-phase AC power outputted from a winding of each phase of a stator of a three-phase AC generator into DC power using a plurality of switching elements to supply the DC power to a battery; a control unit that controls switching between an energized state and non-energized state of each of the plurality of switching elements; and a position detection unit that outputs a position detection signal indicating a position of a rotor of the three-phase AC generator, the control unit obtaining a next estimation power generation period of the three-phase AC generator on the basis of the previous position detection signal and determining a next energization period of each of the plurality of switching elements on the basis of the estimation power generation period, wherein the control unit judges start of the energization period on the basis of input of the position detection signal, and, if a period until next input of the position detection signal exceeds the energization period, during the period until the next input of the position detection signal, the control unit has a maintenance period in which the plurality of switching elements are maintained in the energized state or non-energized state immediately before the period until the next input of the position detection signal exceeds the energization period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A battery charging apparatus for a vehicle, comprising:
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a driver comprising switching elements to convert three-phase AC power outputted from a winding of each phase of a stator of a three-phase AC generator into DC power to supply the DC power to a battery; a position detector configured to output a position detection signal indicating a position of a rotor of the three-phase AC generator; and a controller configured to control the switching elements to be switched between an energized state and non-energized state, the controller being configured to obtain an estimation power generation period of the three-phase AC generator based on the position detection signal, to determine an energization period of each of the switching elements based on the estimation power generation period, and to determine start of the energization period based on input of the position detection signal, the controller being configured to have a maintenance period during a period until next input of the position detection signal if the period exceeds the energization period, the switching elements being to be maintained in the maintenance period in the energized state or non-energized state immediately before the period exceeding the energization period. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification