A high-efficiency wireless charger that detects foreign objects
A technology for wireless chargers and detection of foreign objects, applied to radio wave measurement systems, current collectors, instruments, etc., can solve problems such as circuit complexity, charger efficiency reduction, and expansion of the distance between the power transmitting coil and the power receiving coil. Simple structure and effect of preventing foreign matter
Active Publication Date: 2019-02-12
TEN PAO ELECTRONICS HUIZHOU +1
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in this method, the use of multiple temperature sensors not only increases the cost of the entire wireless charger and complicates the circuit, but also increases the distance between the power transmitting coil and the power receiving coil because the temperature sensor is arranged between the power transmitting coil and the power receiving coil. which reduces the efficiency of the entire charger
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] see figure 1 with figure 2 , a high-efficiency wireless charger capable of detecting foreign objects in the present invention mainly includes a wireless transmitter and a wireless receiver. The wireless transmitting end mainly includes a transmitting unit, a first MCU 105, a first communication circuit 108, a first current sampling circuit 106, and a main power switch 107, wherein the transmitting unit further includes a first rectifying and filtering circuit 101, a PFC circuit 102, and an LLC drive circuit 103. The first resonant inductor L1, the resonant capacitor C1, and the sampling resistor R1, and the PFC circuit 102, the first MCU 105, and the LLC drive circuit 103 are all powered by the auxiliary power supply 104, and the auxiliary power supply 104 is used to supply power, and the wireless charger does not perform During power transmission, only the auxiliary power supply 104 works to reduce energy loss, and the resonant capacitor C1 is grounded through the sa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the wireless charging field and particularly relates to an efficient wireless charger capable of detecting foreign matters. The charger comprises a sending unit, a reception unit, a first MCU, a first communication circuit, a second MCU, a second communication circuit, a cell set and a main power switch. When the main power switch is closed off, whether the second communication circuit has a signal is detected by the first communication circuit, no foreign matters exist when the signal of the second communication circuit is detected, the signal of the first communication circuit is received by the first MCU, the main power switch is started, a magnetic signal is sent by the sending unit, the magnetic signal of the sending unit is received by the reception unit and is converted into a DC electricity which is used for charging the cell set; if the signal of the second communication circuit can not be detected by the first communication circuit, the main power switch can be continuously closed off. According to the charger, the circuit structure is simple and reliable, the foreign matters can be stably detected, and high efficiency is realized.
Description
technical field [0001] The invention relates to the field of wireless charging, in particular to a high-efficiency wireless charger capable of detecting foreign objects using electromagnetic induction technology. Background technique [0002] In the wireless charger, if a metal foreign object is placed on the charging platform between the transmitting end and the receiving end of the wireless charger, the AC magnetic field will generate eddy current loss in the metal and generate heat, which will generate high temperature and cause a fire, etc. security incident. Therefore, all existing wireless charging devices need a device or a detection method with a foreign object detection function. In the prior art, a plurality of temperature sensors are arranged vertically and horizontally on the upper surface of the charging platform, and the abnormal heat generated by foreign objects on the charging platform is detected by the temperature sensors. However, in this method, the use...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/02G01V3/10
Inventor 严崇俊韩光朱昌亚洪光岱
Owner TEN PAO ELECTRONICS HUIZHOU