NON-CONTACT POWER TRANSMISSION DEVICE, POWER TRANSMISSION DEVICE AND ELECTRONIC APPARATUS USING THE SAME
First Claim
1. A non-contact power transmission device to supply electric power to a secondary coil from a primary coil by electromagnetically coupling the primary coil to the secondary coil, comprising:
- a temperature detection element that detects temperature; and
a detection section that detects a rise of temperature based on a first temperature detected by the temperature detection element at a first time and a second temperature detected by the temperature detection element at a second time,the non-contact power transmission device stopping supplying electric power from the primary coil when the detection section detects that the rise of temperature is greater than a reference value.
1 Assignment
0 Petitions
Accused Products
Abstract
A non-contact power transmission device for supplying electric power to a secondary coil from a primary coil by electromagnetically coupling the primary coil to the secondary coil, includes a temperature detection element that detects temperature and a detection section that detects rise of temperature based on a first temperature at a first clock time and a second temperature at a second clock time detected by using the temperature detection element. When a degree of the rise of temperature is greater than a reference value, the non-contact power transmission device stops supplying of the electric power from the primary coil.
33 Citations
18 Claims
-
1. A non-contact power transmission device to supply electric power to a secondary coil from a primary coil by electromagnetically coupling the primary coil to the secondary coil, comprising:
-
a temperature detection element that detects temperature; and a detection section that detects a rise of temperature based on a first temperature detected by the temperature detection element at a first time and a second temperature detected by the temperature detection element at a second time, the non-contact power transmission device stopping supplying electric power from the primary coil when the detection section detects that the rise of temperature is greater than a reference value. - View Dependent Claims (2, 3, 4, 5, 12)
-
-
6. A power transmission device that supplies electric power to a power reception device by electromagnetically coupling a primary coil to a secondary coil, the power transmission device comprising:
-
a power transmission section that transmits an alternating current (AC) signal to the primary coil; a temperature detection element disposed in a magnetic flux forming region of the primary coil; a detection section that detects a rise of temperature based on a first temperature detected by the temperature detection element at a first time and a second temperature detected by the temperature detection element at a second time; and a power transmission control section that controls the power transmission section, the power transmission control section stopping transmission of electric power from the primary coil when the detection section detects that the rise of temperature is greater than a reference value. - View Dependent Claims (7, 8, 9, 10, 11, 13)
-
-
14. A method of detecting an abnormal condition in a non-contact power transmission device that supplies electric power to a power reception device by electromagnetically coupling a primary coil of the non-contact power transmission device to a secondary coil of the power reception device, the method comprising:
-
generating a first value that corresponds to a first temperature within the non-contact power transmission device at a first time; generating a second value that corresponds to a second temperature within the non-contact power transmission device at a second time; determining a rise of temperature based on a comparison of the first value with the second value; and disconnecting power to the primary coil of the non-contact power transmission device in the case where the rise of temperature is greater than a reference value. - View Dependent Claims (15, 16, 17, 18)
-
Specification