Wireless power transmitting device and wireless power transmission system using the same
First Claim
1. A wireless power transmitting device that transmits power to a wireless power receiving device by wireless, the wireless power transmitting device comprising:
- a boost converter that boosts an input DC voltage;
an inverter that converts an output voltage of the boost converter into an AC voltage;
a power transmitting coil that is supplied with the AC voltage to generate an AC magnetic field;
a receiving circuit that receives a power transmission command signal from the wireless power receiving device;
a boost control circuit that controls a boost level of the boost converter according to the power transmission command signal;
an operation detection circuit that detects whether or not the boost converter is operated; and
an inverter control circuit that controls the inverter,wherein the operation detection circuit activates a stop signal when detecting that the boost converter does not perform operation after an elapse of a predetermined time period from a start of power transmission, andwherein the inverter control circuit stops an operation of the inverter in response to the stop signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein is a wireless power transmitting device that includes: a boost converter boosting an input DC voltage; an inverter converting an output voltage of the boost converter into an AC voltage; a power transmitting coil supplied with the AC voltage to generate an AC magnetic field; a receiving circuit receiving a power transmission command signal; a boost control circuit controlling a boost level of the boost converter according to the power transmission command signal; an operation detection circuit detecting whether or not the boost converter is operated; and an inverter control circuit controlling the inverter. The operation detection circuit activates a stop signal when detecting that the boost converter does not perform operation after an elapse of a predetermined time period from a start of power transmission. The inverter control circuit stops an operation of the inverter in response to the stop signal.
-
Citations
6 Claims
-
1. A wireless power transmitting device that transmits power to a wireless power receiving device by wireless, the wireless power transmitting device comprising:
-
a boost converter that boosts an input DC voltage; an inverter that converts an output voltage of the boost converter into an AC voltage; a power transmitting coil that is supplied with the AC voltage to generate an AC magnetic field; a receiving circuit that receives a power transmission command signal from the wireless power receiving device; a boost control circuit that controls a boost level of the boost converter according to the power transmission command signal; an operation detection circuit that detects whether or not the boost converter is operated; and an inverter control circuit that controls the inverter, wherein the operation detection circuit activates a stop signal when detecting that the boost converter does not perform operation after an elapse of a predetermined time period from a start of power transmission, and wherein the inverter control circuit stops an operation of the inverter in response to the stop signal. - View Dependent Claims (2)
-
-
3. A wireless power transmission system comprising:
-
a wireless power transmitting device; and a wireless power receiving device that receives power from the wireless power transmitting device by wireless, wherein the wireless power transmitting device comprising; a boost converter that boosts an input DC voltage; an inverter that converts an output voltage of the boost converter into an AC voltage; a power transmitting coil that is supplied with the AC voltage to generate an AC magnetic field; a receiving circuit that receives a power transmission command signal from the wireless power receiving device; a boost control circuit that controls a boost level of the boost converter according to the power transmission command signal; an operation detection circuit that detects whether or not the boost converter is operated; and an inverter control circuit that controls the inverter, wherein the operation detection circuit activates a stop signal when detecting that the boost converter does not perform operation after an elapse of a predetermined time period from a start of power transmission, wherein the inverter control circuit stops an operation of the inverter in response to the stop signal, wherein the wireless power receiving device includes; a power receiving coil that takes in AC power through the AC magnetic field; a rectifying circuit that converts the AC power received by the power receiving coil into DC power; an output detection circuit that generates the power transmission command signal based on a comparison result between an output characteristic value of the rectifying circuit and a target value; a transmitting circuit that transmits the power transmission command signal; and a start-up circuit that permits transmission of the power transmission command signal to the receiving circuit when the output characteristic value of the rectifying circuit is equal to or larger than a threshold value. - View Dependent Claims (4, 5, 6)
-
Specification