System for Wireless Charging Control Based Magnetic Resonance Type
First Claim
1. A wireless charging control system based on a magnetic resonance type, comprising:
- an oscillator generating power for contactless charging;
a transmitting oscillation circuit including a power source coil to which the power is input and a power source capacitor connected to the power source coil in parallel to convert a capacitance so as to cause oscillation at a specific frequency;
a power transmitter unit including a transmitting resonance circuit which includes a transmitting resonance coil causing resonance by changing an inductance and a capacitance to be resonated at the same frequency in the transmitting oscillation circuit and a transmitting resonance capacitor connected to the transmitting resonance coil in series;
a receiving resonance coil including a receiving resonance coil receiving electromagnetic waves generated by the power transmitter unit and absorbing input energy by being resonated at the same frequency and a receiving resonance capacitor connected to the receiving resonance coil in series;
a power receiving circuit including a load element coil to receive power of energy stored in the receiving resonance circuit by changing an impedance and a load element capacitor connected to the load element coil in series; and
a receiving charger unit including a controller sensing a strength of current and a charging voltage transferred to a battery unit to change the receiving resonance capacitor or the load element capacitor.
1 Assignment
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Accused Products
Abstract
Provided is a wireless charging control system based on a magnetic resonance type, and more particularly, a wireless charging control system based on a magnetic resonance type which does not require a separate transmitter unit and a receiver unit to detect a current charging state of a receiving charger unit between a power transmitter unit and the receiving charger unit and changes a transmission output of a power transmitter unit in real time by changing a load impedance of a load element coil using a variable capacitor or a switch to meet a charging state of a battery unit by the receiving charger unit to prevent unnecessary transmission power while charging, thereby more efficiently and safely performing wireless charging.
10 Citations
7 Claims
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1. A wireless charging control system based on a magnetic resonance type, comprising:
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an oscillator generating power for contactless charging; a transmitting oscillation circuit including a power source coil to which the power is input and a power source capacitor connected to the power source coil in parallel to convert a capacitance so as to cause oscillation at a specific frequency; a power transmitter unit including a transmitting resonance circuit which includes a transmitting resonance coil causing resonance by changing an inductance and a capacitance to be resonated at the same frequency in the transmitting oscillation circuit and a transmitting resonance capacitor connected to the transmitting resonance coil in series; a receiving resonance coil including a receiving resonance coil receiving electromagnetic waves generated by the power transmitter unit and absorbing input energy by being resonated at the same frequency and a receiving resonance capacitor connected to the receiving resonance coil in series; a power receiving circuit including a load element coil to receive power of energy stored in the receiving resonance circuit by changing an impedance and a load element capacitor connected to the load element coil in series; and a receiving charger unit including a controller sensing a strength of current and a charging voltage transferred to a battery unit to change the receiving resonance capacitor or the load element capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification