POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMITTING DEVICE, NON-CONTACT POWER TRANSMISSION SYSTEM, AND SECONDARY COIL POSITIONING METHOD
First Claim
1. A power transmission control device that controls a power transmitting device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmitting device to a power receiving device via non-contact power transmission through a primary coil and a secondary coil that are electromagnetically coupled, the power transmission control device comprising:
- a power-transmitting-side control circuit that controls power transmission of the power transmitting device to the power receiving device; and
a harmonic detection circuit that detects a harmonic signal of a drive signal of the primary coil.
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Accused Products
Abstract
A power transmission control device used for a non-contact power transmission system includes a power-transmitting-side control circuit that controls power transmission to a power receiving device, and a harmonic detection circuit that detects a harmonic signal of a drive frequency of a primary coil. A resonant circuit (leakage inductance and resonant capacitor) that resonates with the harmonic of the drive frequency of the primary coil L1 is formed in the power receiving device so that harmonic resonance occurs. The harmonic detection circuit detects the harmonic resonance peak of the drive frequency of the primary coil.
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Citations
13 Claims
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1. A power transmission control device that controls a power transmitting device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmitting device to a power receiving device via non-contact power transmission through a primary coil and a secondary coil that are electromagnetically coupled, the power transmission control device comprising:
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a power-transmitting-side control circuit that controls power transmission of the power transmitting device to the power receiving device; and a harmonic detection circuit that detects a harmonic signal of a drive signal of the primary coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A secondary coil positioning method for a non-contact power transmission system that transmits power from a power transmitting device to a power receiving device via non-contact power transmission through a primary coil and a secondary coil that are electromagnetically coupled, a capacitor being connected to the secondary coil, and a resonant circuit that resonates with a harmonic of a drive frequency of the primary coil being formed by a leakage inductance and the capacitor when the primary coil and the secondary coil are electromagnetically coupled in a state in which the center of the primary coil coincides with the center of the secondary coil, the method comprising:
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providing a harmonic detection circuit and a notification section in the power transmitting device, the harmonic detection circuit detecting a harmonic signal of a drive frequency of the primary coil provided in the power transmitting device, and the notification section indicating a detection result for the relative positional relationship between the primary coil and the secondary coil based on a detection output from the harmonic detection circuit; and moving the position of the power receiving device using notification information from the notification section as an index to position the secondary coil with respect to the primary coil.
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13. A method of positioning of a secondary coil of a power receiving device comprising:
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placing the power receiving device on a first position of a power transmitting device; notifying a first information indicating positional relationship of a primary coil of the power transmitting device and the secondary coil; moving a position of the power receiving device to a second position; and confirming a second information indicating positional relationship of the primary coil and the secondary coil.
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Specification