Abstract: The invention relates to a stator for an electric motor. Said stator has an annular stator package having a plurality of stator teeth. An annular interconnection unit is located on the end face of said stator package. Said annular interconnection contains diverting elements. The interconnection unit has a support component which is provided with a cavity and has slots. Provided in said cavity are a multiplicity of mutually electrically insulated connector rings each having contacting elements routed externally through said slots.

Abstract: The invention relates to a stator for an electric motor. Said stator has an annular stator package having a plurality of stator teeth. An annular interconnection unit is located on the end face of said stator package. Said annular interconnection contains diverting elements. The interconnection unit has a support component which is provided with a cavity and has slots. Provided in said cavity are a multiplicity of mutually electrically insulated connector rings each having contacting elements routed externally through said slots.

Abstract: The motor (10) has a rotor (2) which can rotate around a rotation axis (A), and a specific number (N1) of magnetic poles (12). Furthermore, the motor (10) has a stator (4) which is arranged coaxially with respect to the rotor (2) and has three stator teeth (5) for each two magnetic poles (12), which stator teeth (5) are distributed uniformly around the rotation axis, with center points of mutually adjacent stator teeth (5) being separated from one another by one slot pitch (Pc). The stator teeth (5) have free surfaces (Ss?) which are opposite the magnetic poles (12). Each stator tooth (5) is provided with one, and only one, projecting element (14), which extends radially from the respective free surface (Ss?) in the direction of the rotor (2).

Abstract: The motor (10) has a rotor (2) which can rotate around a rotation axis (A), and a specific number (N1) of magnetic poles (12). Furthermore, the motor (10) has a stator (4) which is arranged coaxially with respect to the rotor (2) and has three stator teeth (5) for each two magnetic poles (12), which stator teeth (5) are distributed uniformly around the rotation axis, with center points of mutually adjacent stator teeth (5) being separated from one another by one slot pitch (Pc). The stator teeth (5) have free surfaces (Ss′) which are opposite the magnetic poles (12). Each stator tooth (5) is provided with one, and only one, projecting element (14), which extends radially from the respective free surface (Ss′) in the direction of the rotor (2).

Abstract: A power supply system of an electronic switching electric motor for air-conditioning devices is described, said power supply system is intended to be installed in the motor vehicles and comprises a solar panel (13), which is an integral part of the vehicle and supplies electric energy to the motor (4, 52). The electric motor (4, 52) can be further powered by the vehicle battery (54), in a way that no specific equipment is needed to convert the energy, nor converting devices are needed between the motor (4, 52) and the solar panel (13). Solar panels (13) can be used with a higher voltage output than that of the vehicle battery, in such a way as to draw the available electric energy at a voltage and current level suitable to achieve a significant decrease of the dissipation of energy in the system, with the same sections of wiring or in accordance with the known techniques of the low voltage solar panels.

Abstract: An electronic motor (1) of the electronic commutation type provided with a rotor (5) presenting a centre of rotation (C0) and a number of radial teeth (16) located along respective radial directrixes (K) passing through the centre of rotation (C0) and radially limited by a surface (35) presenting a bending centre (C1) located at any point along a radial directrixx (K) with the exception of a part (T1) included between said centre of rotation (C0) and the surface (35) itself excluding the centre of rotation (C0) and the internal surface (35).

Abstract: An electronic commutation motor including a stator unit configured as a pulse-modulation driven stator unit including at least two winding circuits in which an induced electromagnetic force is produced, and a phase switching switch; and a rotor unit powered by charge stored on a capacitor, wherein the capacitor is charged by diodes coupled between the capacitor the first winding circuits of the stator unit. In this way, the stator unit, serving as a first submachine, performs the function of power supply for the rotor unit serving as a second submachine, by charging of the capacitor via the diodes.

Abstract: The motor comprises a rotor (30) fixed for rotation with a shaft (36) of a member to be driven and a crown-like stator (10) obtained by blanking a lamination stack (12) provided with coil supporting teeth (11). Within the stator crown (10) there are obtained by blanking the lamination stack (12) a plurality of receptacles (13, 15, 17) for seating electric and electronic components associated with the stator. The components comprise a transformer (24), an inductance coil (25), and a plurality of MOSs (23). The stator crown (10) is co-molded with a covering of electrically insulating plastic material to cover the receptacles (13, 15, 17) and the teeth (11) and form a tank (22) for receiving a printed circuit (21). The permanent magnet rotor is fitted with stacks of small pieces (19) obtained by blanking lamination portions within the stator crown (10). The stacks of small pieces face the magnets (31) so as to close the respective magnetic circuits.

Abstract: In an apparatus for controlling static electronic components in the control circuit of a three-phase brushless electric motor, a single shunt device (RS) is used for limiting at least one of the phase currents (IF, I1, I2, I3) of the motor (MT) to a preset limit value. A signal generator device (GS) interrupts the switching of the static electronic components (T1, T2, T3, B1, B2, B3) when the voltage (VS) at the ends of the shunt device (RS) exceeds a preset limit current value. Phase current limitation of the motor (MT) is attained using a PWM technique, alternatively modulating two static electronic components (T1, B2 or B3; T2, B1 or B3; T3, B1 or B2) that are comprised in the electric circuit branch in which there is electric continuity at any instant of the control sequence.

Abstract: A relay for use particularly in motor vehicles has a stable ferromagnetic core, an excitation coil wound around the core and a movable assembly, composed by a movable ferromagnetic armature, connected to a blade carrying an electric contact. The blade is movable with respect to the armature and has a fulcrum in an appropriate seat obtained in the armature. The blade is constrained to the armature in an elastic fashion, but is suitable to produce a damping effect on the bouncing phenomenon. The relay also has a return spring to maintain the assembly in a position of maximum air gap with respect to the stable core, when the device is in a release condition, whereby a leaf spring is provided, being fixed in a predetermined point of the movable armature, which constrains for elastic reaction the movement of the movable blade and maintains the desired pressure contact on the electric contact.

Abstract: The electric fan assembly includes an electric motor composed of a rotor (11) having a fan wheel (12), and a stator (10) fitted with a card (50) supporting a printed circuit for determining operation of the motor. The stator includes a bearing (60) having two main opposite faces, a lower face and an upper face, for mounting the stator (10), defines a seat (62) for the assembly formed by the card (50) and a plurality of MOSs (54) projecting from the edges of the card, where the MOSs are coplanar to the card. The seat (62) has a depth dimensioned to receive a layer of solidifying resin covering and protecting the printed circuit and the relevant connections. The stator bearing (60) is axially crossed by channels (65) providing electric connection between the stator winding leads (30) and electric contacts (52) located on the card (50) proximate to an opening (51) obtained in the card at the channels (65).

Abstract: The interface circuit has a single input terminal for receiving an analog or digital control signal indicative of the required speed of rotation of the motor. The type of input signal is recognised by means of comparator circuits. The input signal is processed differently according to its nature in order, in any case, to output an analog signal acceptable by the regulation and control circuit which pilots the motor.

Abstract: A control circuit for a half-wave brushless motor. The control circuit includes n circuit branches, each with an electronic power switch connected in series with the respective winding or phase of the motor across the terminals of a voltage source in parallel to the other n-1 circuit branches, a pilot circuit for providing enabling signals to render the power switches selectively conductive, current recirculation elements for dissipating transient current that flows in each phase of the motor whenever the associated power switch is turned off, and a voltage limiter for limiting, to a predetermined threshold voltage, the voltage surge due to the transient current.

Abstract: The circuit comprises synchronisation devices operable to provide, for a motor having n phases, n square wave control signals phase displaced from one another by 360/n electrical degrees, with a frequency proportional to the speed of the rotor of the motor, and linear feedback pilot circuit devices operable to provide at their output, cyclically to each of the power transistors, which pilot the phases, a respective pilot signal variable as a function of a reference signal and the voltage on the corresponding phases of the motor.

Abstract: The motor includes a rotor with an angular array of 2n permanent magnets with a predetermined pole pitch, in which alternate magnets have opposite polarities but the same angular extent substantially equal to 2/3 of the pole pitch.

Abstract: The fan includes a bladed, centrifugal fan wheel and an electric motor with an external rotor which is foxed torsionally to the fan wheel. The motor includes a casing constituted by a stationary part with holes for taking in air from outside for ventilating the interior of the motor and a rotary part with holes which act as outlet ducts for the internal ventilation air. The cross-sections of the ducts decrease in the direction of the air-flow and open into the outside atmosphere in regions over which the air-flow induced by the fan wheel passes in operation.

Abstract: The ignition unit includes a support housing containing two ignition coils each for the connection to at least one, and preferably two, associated spark plugs. Each ignition coil comprises a primary winding and a second winding disposed around the end arms of a magnetic core or circuit formed by only two packs of plates juxtaposed so that together they form essentially a figure-of-8 shape. The packs of plates are identical, essentially E-shaped and are placed close together, face-to-face, so that together they form a squared figure-of-8 shape. Each of the packs of plates has a notch which extends from the back of the E into its central arm and almost up to the end of the free end thereof. Conveniently, inserts of non-magnetic material are disposed in the notches in the packs of plates.

Abstract: A keyboard unit is shown having a substrate in which portions of the substrate are physically displaced to provide a cavity, an embossment and a plurality of protuberances for each switching station. The embossment, in registry with a button contact area, projects upwardly from the floor of the cavity a selected distance with a discontinuous annulus contact area extending around its respective cavity in generally the same plane as that in which the top surface of the substrate lies. The cavity includes a channel shaped portion extending through the discontinued portion of the discontinuous annulus. The protuberances project upwardly from the general plane of the substrate's top surface and serve to laterally locate a snap-acting disc over the contact areas. The disc may be selectively coated with highly electrically conductive material to optimize electrical switching. A piece of flexible, electrically insulative sheet may be placed over the unit to seal it from the environment.

Abstract: A thermostat equipped with a bimetallic element sensitive to a given temperature comprises a monolithic base open at one end in which two terminals connectable to an electric circuit are inserted and precisely located, each having one end bent at a right angle and each carrying a stationary contact, an element carrying movable contacts for connecting the stationary contacts with one another, a spring housed in a seat on said base biasing the movable contact element to engage the stationary contacts, a sliding element for moving and guiding said movable contact-carrying element, a bimetallic element suitably spaced from the said sliding element for initiating movement of the sliding element in response to temperature change, and a lid which fastens the said bimetallic element to the said base with said spacing from the sliding element.

Abstract: A delayed-action thermal relay, particularly for starting single-phase induction motors, comprises a case of insulating material, a first, a second, and a third terminal within the case, an actuator unit consisting of a heating element of a material with positive temperature coefficient and of a bimetal member, and first and second contacts that are normally closed carried by the bimetal and by the third terminal respectively, said actuator unit being forcibly and adjustably inserted between the first and second terminals.