Abstract: An electrically powered blower configured to be capable of fully cooling its motor and of efficiently cooling a power element in a drive circuit without involving such need as of increasing the size of a fin of a separate heat radiator, contributing to miniaturization of electric equipments. The electrically powered blower includes a power element (10) provided in a drive circuit (9) and connected to a motor casing (B). Since the motor casing (B) serves as a cooling fin for the power element (10), a great effect on cooling can be obtained, and a heat radiator separate from the motor casing is not required, thus contributing to miniaturization of electric equipments.

Abstract: An electrically powered blower configured to be capable of fully cooling its motor and of efficiently cooling a power element in a drive circuit without involving such need as of increasing the size of a fin of a separate heat radiator, contributing to miniaturization of electric equipments. The electrically powered blower includes a power element (10) provided in a drive circuit (9) and connected to a motor casing (B). Since the motor casing (B) serves as a cooling fin for the power element (10), a great effect on cooling can be obtained, and a heat radiator separate from the motor casing is not required, thus contributing to miniaturization of electric equipments.

Abstract: A field system assembly of a double pole commutator motor includes a pair of yokes each having a connecting portion at both ends thereof, and a pair of poles each having a connecting portion which is capable of being connected with one of the connecting portions of the yoke. A slot at each pole for introducing a winding thereinto. The field system assembly includes four split parts. A winding is wound around the pole from the outside of the core by using a flyer and then, one of the connecting portions of each pole and the corresponding connecting portion of one of the yokes is pressed into the other.