| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor downsizing in a diametrical direction of the brushless motor including a switching element, and having excellent heat resistance.SOLUTION: A brushless motor includes: a motor housing 101; a stator 102; a rotor 106; an end cap 113 disposed at an opening portion of the motor housing 101; a separation wall 116a disposed at a lower part of the end cap 113; a heat sink 124 attached to a cylinder portion 116b; a control circuit substrate 118; a switching element 121 mounted on the control circuit substrate 118; and an attaching plate 122 attached with the switching element 121, thermally united with the heat sink 124, and disposed in a space 129 between the control circuit substrate 118 and the heat sink 124. The end cap 113 and the separation wall 116a are disposed while keeping a fixed distance. The heat sink 124 is equipped with a through-hole 130 through which a lead wire 126 connected to the control circuit substrate 118 is pulled out. |
