초록 ▼

An electronically commutated motor has a printed circuit board with opposite sides and a heat dissipating means arranged in spaced apart relation at least in part in the path of at least some of the cooling circulated in the electronically commutated motor by the rotatable assembly thereof. A plural

An electronically commutated motor has a printed circuit board with opposite sides and a heat dissipating means arranged in spaced apart relation at least in part in the path of at least some of the cooling circulated in the electronically commutated motor by the rotatable assembly thereof. A plurality of insulated gate transistors are located on the heat dissipating means in heat transfer relation therewith adjacent one opposite side of the printed circuit board and are operable to commutate power supplied to the winding stages of the electronically commutated motor. Other solid state components for controlling the conductivity of the insulated gate transistors are located on the other opposite side of the printed circuit board, and the insulated gate transistors and the other solid state components are connected in circuit relation with the printed circuit board.

대표청구항 ▼

An electronically commutated motor comprising: a housing including at least one end; a stator in said housing; a multi-stage winding arrangement associated with said stator and including a plurality of winding stages adapted to be electronically commutated in at least one preselected sequence; a per

An electronically commutated motor comprising: a housing including at least one end; a stator in said housing; a multi-stage winding arrangement associated with said stator and including a plurality of winding stages adapted to be electronically commutated in at least one preselected sequence; a permanent magnet rotatable assembly associated with said stator so as to be arranged in selective magnetic coupling relation with said winding stages and rotatable in response to the electronic commutation of at least some of said winding stages in the at least one preselected sequence to effect a circulation of cooling air through at least a part of said housing; a thermally conductive enclosure mounted to said housing and enclosing said at least one end of said housing; means for dissipating heat secured in heat sink relation to said thermally conductive enclosure therewithin and disposed at least in part in the path of at least some of the cooling air circulated by said permanent magnet rotatable assembly; a printed circuit board mounted in adjacent spaced relation with said heat dissipating means and disposed at least in part in the path of the at least some cooling air circulated by said permanent magnet rotatable assembly, and said printed circuit board including a pair of generally opposite sides; and means for controlling the electronic commutation of said winding stages and including a plurality of solid state components connected in circuit relation with said printed circuit board, some of said solid state components comprising a plurality of insulated gate transistors arranged on said heat dissipating means in heat transfer relation therewith and spaced adjacent one of said opposite sides of said printed circuit board, and the rest of said solid state components being mounted to the other of the opposite sides of said printed circuit board respectively.