Noncontact electric power transmission system
First Claim
1. A noncontact electric power transmission system having a power transmitter circuit section and a power receiver circuit section which are adapted to be coupled to transmit electric power from a transmitter coil provided in the power transmitter circuit section to a receiver coil provided in the power receiver circuit section, in a noncontact manner by means of electromagnetic induction, the noncontact electric power transmission system comprising:
- a separately-excited or self-excited switching circuit provided in the power transmitter circuit section;
a control IC operable to drive the switching circuit;
an LC series resonant circuit including a capacitor connected in series to the transmitter coil or an LC parallel resonant circuit including a capacitor connected in parallel to the transmitter coil; and
an LC parallel resonant circuit including a capacitor connected in parallel to the receiver coil, wherein an oscillating frequency (Fosc) of the control IC, a resonant frequency (Fpr) of the LC series resonant circuit or the LC parallel resonant circuit in the power transmitter circuit section, and a resonant frequency (Fsr) of the LC parallel resonant circuit in the power receiver circuit section, have the following relationship;
Fpr<
Fosc<
Fsr.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a noncontact electric power transmission system having a power transmitter circuit section 10 and a power receiver circuit section 30 which are adapted to be coupled to transmit electric power from a transmitter coil Lp provided in the power transmitter circuit section 10 to a receiver coil Ls provided in the power receiver circuit section 30, in a noncontact manner by means of electromagnetic induction. The noncontact electric power transmission system comprises: a separately-excited or self-excited switching circuit 2 provided in the power transmitter circuit section 10; a control IC 3 operable to drive the switching circuit 2; an LC series resonant circuit including a capacitor Cp connected in series to the transmitter coil Lp or an LC parallel resonant circuit including a capacitor Cp connected in parallel to the transmitter coil Lp; and an LC parallel resonant circuit including a capacitor Cs connected in parallel to the receiver coil Ls, wherein an oscillating frequency (Fosc) of the control IC 3, a resonant frequency (Fpr) of the LC series resonant circuit or the LC parallel resonant circuit in the power transmitter circuit section 10, and a resonant frequency (Fsr) of the LC parallel resonant circuit in the power receiver circuit section 30, have the following relationship: Fpr<Fosc<Fsr.
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Citations
2 Claims
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1. A noncontact electric power transmission system having a power transmitter circuit section and a power receiver circuit section which are adapted to be coupled to transmit electric power from a transmitter coil provided in the power transmitter circuit section to a receiver coil provided in the power receiver circuit section, in a noncontact manner by means of electromagnetic induction, the noncontact electric power transmission system comprising:
- a separately-excited or self-excited switching circuit provided in the power transmitter circuit section;
a control IC operable to drive the switching circuit;
an LC series resonant circuit including a capacitor connected in series to the transmitter coil or an LC parallel resonant circuit including a capacitor connected in parallel to the transmitter coil; and
an LC parallel resonant circuit including a capacitor connected in parallel to the receiver coil, wherein an oscillating frequency (Fosc) of the control IC, a resonant frequency (Fpr) of the LC series resonant circuit or the LC parallel resonant circuit in the power transmitter circuit section, and a resonant frequency (Fsr) of the LC parallel resonant circuit in the power receiver circuit section, have the following relationship;
Fpr<
Fosc<
Fsr. - View Dependent Claims (2)
- a separately-excited or self-excited switching circuit provided in the power transmitter circuit section;
Specification