NON-CONTACT POWER TRANSMISSION SYSTEM
First Claim
1. A non-contact power transmission system for transmitting power without contact from a primary coil that is provided for a charging station to a secondary coil that is provided for an electric vehicle, the system comprising:
- a primary side control unit that transmits to the primary coil a weak power for alignment of the primary coil and the secondary coil;
a voltage detector that detects voltage generated by the weak power that is received in the secondary coil;
a storage device that stores a voltage value-horizontal distance characteristic that represents a relation between a distance between a reference part of the primary coil and a reference part of the secondary coil in a horizontal direction, and a value of the voltage in accordance with the distance;
a sensor that detects a vehicle state that changes the voltage value-horizontal distance characteristic;
a characteristic setting unit that sets a voltage value-horizontal distance characteristic that matches the vehicle state, on the basis of a value detected by the sensor and the voltage value-horizontal distance characteristic stored in the storage device; and
a horizontal distance estimation unit that estimates the distance on the basis of the voltage value-horizontal distance characteristic set by the characteristic setting unit and the value of the voltage detected by the voltage detector.
1 Assignment
0 Petitions
Accused Products
Abstract
A storage device stores a voltage value-horizontal distance characteristic that represents a relation between a horizontal distance between a primary coil and a secondary coil, and a voltage value. A characteristic setting unit sets a voltage value-horizontal distance characteristic that matches a vehicle state, on the basis of a value for the vehicle state (vehicle speed v, vehicle height h, and inclination i) detected by sensors and the voltage value-horizontal distance characteristic stored in the storage device. A horizontal distance estimation unit estimates the horizontal distance on the basis of the voltage value-horizontal distance characteristic and the voltage value.
4 Citations
6 Claims
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1. A non-contact power transmission system for transmitting power without contact from a primary coil that is provided for a charging station to a secondary coil that is provided for an electric vehicle, the system comprising:
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a primary side control unit that transmits to the primary coil a weak power for alignment of the primary coil and the secondary coil; a voltage detector that detects voltage generated by the weak power that is received in the secondary coil; a storage device that stores a voltage value-horizontal distance characteristic that represents a relation between a distance between a reference part of the primary coil and a reference part of the secondary coil in a horizontal direction, and a value of the voltage in accordance with the distance; a sensor that detects a vehicle state that changes the voltage value-horizontal distance characteristic; a characteristic setting unit that sets a voltage value-horizontal distance characteristic that matches the vehicle state, on the basis of a value detected by the sensor and the voltage value-horizontal distance characteristic stored in the storage device; and a horizontal distance estimation unit that estimates the distance on the basis of the voltage value-horizontal distance characteristic set by the characteristic setting unit and the value of the voltage detected by the voltage detector. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification