US 12,447,635 B2
Cooling device for robot controller
Hajime Takagi, Nagano (JP)
Assigned to NIDEC INSTRUMENTS CORPORATION, Nagano (JP)
Filed by NIDEC INSTRUMENTS CORPORATION, Nagano (JP)
Filed on Jun. 1, 2023, as Appl. No. 18/327,064.
Claims priority of application No. 2022-098058 (JP), filed on Jun. 17, 2022.
Prior Publication US 2023/0405846 A1, Dec. 21, 2023
Int. Cl. B25J 19/00 (2006.01); H05K 7/20 (2006.01)
CPC B25J 19/0054 (2013.01) [H05K 7/20154 (2013.01); H05K 7/20209 (2013.01); H05K 7/20909 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A cooling device for a robot controller comprising a servo driver having a control circuit, a circuit board and a heat generation element, wherein the heat generation element is a semiconductor element configuring an inverter circuit that drives a motor, the cooling device comprising:
a fin member which is attached to the heat generation element;
a temperature sensor;
a heat conductive sheet which transmits heat generated in the heat generation element to the temperature sensor;
a fan which generates an air flow toward the fin member; and
a fan control part which controls the fan based on a detection value of the temperature sensor;
wherein the heat conductive sheet is disposed between the circuit board and the heat generation element in the servo driver and is contacted with both of the circuit board and the heat generation element,
the temperature sensor is provided on a first surface of the circuit board and is covered by the heat conductive sheet,
the control circuit is provided on a second surface of the circuit board opposite to the first surface, and
the temperature sensor does not overlap the control circuit when viewed in a thickness direction of the circuit board.