Patent ID: 9155231
Filing Date: 2015-10-06
Classification: G06F,H02M,H05K

Abstract:
1. A motor-drive unit comprising: a first substrate and a second substrate wherein a circuit for driving a motor is divided and divided sections of the circuit are formed on the first and second substrates; a connecting part which connects the first and second substrates so that the first and second substrates intersect with each other; a semiconductor device mounted on each of the first and second substrates; a heat radiator having a first heat-transferring surface adjacent to the semiconductor device mounted on the first substrate and a second heat-transferring surface having a surface direction different from a surface direction of the first heat-transferring surface; and a capacitor positioned within a swept area formed by moving the first substrate in a direction perpendicular to the first heat-transferring surface, the capacitor being separated from the first substrate, wherein the semiconductor devices are positioned adjacent to at least the first and second heat transferring surfaces, respectively.