Abstract: A fluid circulator including a pump body with an impeller; an electric motor having a rotor connected to the impeller for rotatably driving the impeller; an end portion associated with the motor body for housing at least one electronic board for controlling the circulator. The end portion is monolithically cup-shaped lid fitted onto the motor body in substantial continuity therewith enclosing a housing compartment for said electronic board; an electronic power device mounted onto the electronic board so as to face the end wall of the cup-shaped lid; at least one portion of said end wall being recessed towards the electronic board and being externally provided with at least one cooling fin extending in parallel to the axis of the motor to constitute a heat sink; and a layer of a heat-conductive paste material in contact with the electronic power devices and recessed surface.

Abstract: The present invention relates to a fluid circulator (1) comprising a pump body (2) comprising an impeller (21) for the movement of the fluid; a motor body (10) comprising an electric motor (7, 8, 9) for putting the impeller (21) into rotation around an axis (X-X); as well as an end portion (3) associated with the motor body (10) and containing at least one electronic board (12) for the control of the circulator (1).

Abstract: The invention relates to a synchronous permanent-magnet motor preferably used in fluid driving pumps and in particular circulators for heating and/or cooling plants, of the type comprising: a stator or stator stack housed in a circulator body; a permanent-magnet rotor; an electronic control board of the circulator, installed in a casing associated with the circulator body. Advantageously a direct internal electrical connection is provided between the stator stack 11 and the electronic board so as to form a functional earthing connection terminal. This connection is obtained by means of a terminal having one end fixed to the metal structure of the stator stack and the other end connected to said electronic board.