Abstract: If the motor housing 5 is manufactured with a resin, the housing 5 becomes possible to be manufactured by injection molding, so that the housing 5 can be intended to lower the manufacturing cost by a mass production. Further, the counter measures for insulation such as covering a copper wire 7 with an insulating tape, interposing an insulator to an opening 5a of the housing installing an insulating shim between the coil 6a and the housing 5 become unnecessary. As a result, it becomes possible to expect a cost down of the spindle motor due to the reduction of the cost of the parts for insulating members and the mounting processes. And, further, since a vibration transmitted from the rotor 1 through the bearing and a vibration caused by an electric switching of the stator 6 etc. are diminished due to elastic absorbing function of the housing 5, rotation noise of the spindle motor can be reduced.

Abstract: The invention relates to a brushless electric motor comprising a stator, which has pole elements, and a rotor, which is mounted rotatably in relation to the stator and comprises magnet poles of magnetic powder material bonded to form a body and a back yoke body carrying the magnet poles, the magnet poles being formed by at least one molded magnetic body, which is molded with a back yoke side onto the back yoke body.

Abstract: In order in the case of an electric motor, in particular a brushless electric motor, comprising a rotor, a stator, a motor housing receiving the rotor and the stator, a first bearing, disposed on the motor housing, and a second bearing, disposed opposite the first bearing, to allow the bearings to be positioned with the necessary precision when the rotor is being fitted into the motor housing, it is proposed that the motor housing comprises a housing body, which receives the stator, and a flange body, which receives the second bearing and can be mounted on the housing body, and that the flange body, when it is in an axial end position in relation to the rotor axis, is guided on the housing body against a movement transversely to the rotor axis and is fixed in relation to the housing body against a movement in the direction of the rotor axis by means of first positively connecting features, provided on the flange body, and second positively connecting features, provided on the housing body, which features can

Abstract: A rotor assembly for an electric motor having a rotor shaft and at least one permanent magnet arranged on the rotor shaft. The rotor shaft with the permanent magnet is accommodated in a sleeve the rotor shaft being freely rotatable within the sleeve. The sleeve is closed off by a flange at a first end face. An inner-rotor electric motor having a stator and a rotor assembly of the type described above, with the stator being inserted over the sleeve of the rotor assembly.

Abstract: The invention relates to a spindle motor having at least one rotating part that is rotatably supported with respect to at least one stationary part by means of a bearing system, an electromagnetic drive system being provided whose stator arrangement arranged on the stationary part of the motor is separated by a gap from a magnet arrangement on the rotating part. The distinctive feature of the invention is that the gap simultaneously forms the bearing gap of the bearing system.

Abstract: The invention relates to a relay supporting unit for an electric motor to arrange a number of relays at the end of the electric motor, at which winding connections and signal lines of the electric motor are provided. The relays are used to connect and interrupt the power supply to the motor windings. The relay supporting unit according to the invention features a supporting component which is designed in such a way that it extends over the end of the electric motor and has at least one, preferably several, chambers to accommodate and position the relays. A connecting frame is integrated into the supporting component to electrically connect the winding connections and the relays. Furthermore, a sensor PCB is also preferably integrated to which the signal lines of the electric motor can be connected.

Abstract: If the motor housing 5 is manufactured with a resin, the housing 5 becomes possible to be manufactured by injection molding, so that the housing 5 can be intended to lower the manufacturing cost by a mass production. Further, the counter measures for insulation such as covering a copper wire 7 with an insulating tape, interposing an insulator to an opening 5a of the housing installing an insulating shim between the coil 6a and the housing 5 become unnecessary. As a result, it becomes possible to expect a cost down of the spindle motor due to the reduction of the cost of the parts for insulating members and the mounting processes. And, further, since a vibration transmitted from the rotor 1 through the bearing and a vibration caused by an electric switching of the stator 6 etc. are diminished due to elastic absorbing function of the housing 5, rotation noise of the spindle motor can be reduced.

Abstract: The invention relates to an electric motor for a linear drive system comprising a motor housing within which a stator, a rotor and a threaded shank are accommodated. The stator has a stator core and phase windings which are connected to phase connectors. The rotor is mounted onto a rotor hub, the rotor hub being supported in the motor housing by roller bearings and coupled to the threaded shank via a thread in order to transform the rotation of the rotor into a translational motion of the threaded shaft. In accordance with a first aspect of the invention, the motor housing has an injection molded part within which the stator, together with the stator core and phase windings, is embedded. A linear guide to accommodate and guide the threaded shank is integrated into the injection molded part of the motor housing.

Abstract: The invention relates to a brushless electric motor comprising a stator, which has pole elements, and a rotor, which is mounted rotatably in relation to the stator and comprises magnet poles of magnetic powder material bonded to form a body and a back yoke body carrying the magnet poles, the magnet poles being formed by at least one molded magnetic body, which is molded with a back yoke side onto the back yoke body.

Abstract: In order in the case of an electric motor, in particular a brushless electric motor, comprising a rotor, a stator, a motor housing receiving the rotor and the stator, a first bearing, disposed on the motor housing, and a second bearing, disposed opposite the first bearing, to allow the bearings to be positioned with the necessary precision when the rotor is being fitted into the motor housing, it is proposed that the motor housing comprises a housing body, which receives the stator, and a flange body, which receives the second bearing and can be mounted on the housing body, and that the flange body, when it is in an axial end position in relation to the rotor axis, is guided on the housing body against a movement transversely to the rotor axis and is fixed in relation to the housing body against a movement in the direction of the rotor axis by means of first positively connecting features, provided on the flange body, and second positively connecting features, provided on the housing body, which features can

Abstract: The invention relates to a relay supporting unit for an electric motor to arrange a number of relays at the end of the electric motor, at which winding connections and signal lines of the electric motor are provided. The relays are used to connect and interrupt the power supply to the motor windings. The relay supporting unit according to the invention features a supporting component which is designed in such a way that it extends over the end of the electric motor and has at least one, preferably several, chambers to accommodate and position the relays. A connecting frame is integrated into the supporting component to electrically connect the winding connections and the relays. Furthermore, a sensor PCB is also preferably integrated to which the signal lines of the electric motor can be connected.

Abstract: If the motor housing 5 is manufactured with a resin, the housing 5 becomes possible to be manufactured by injection molding, so that the housing 5 can be intended to lower the manufacturing cost by a mass production. Further, the counter measures for insulation such as covering a copper wire 7 with an insulating tape, interposing an insulator to an opening 5a of the housing installing an insulating shim between the coil 6a and the housing 5 become unnecessary. As a result, it becomes possible to expect a cost down of the spindle motor due to the reduction of the cost of the parts for insulating members and the mounting processes. And, further, since a vibration transmitted from the rotor 1 through the bearing and a vibration caused by an electric switching of the stator 6 etc. are diminished due to elastic absorbing function of the housing 5, rotation noise of the spindle motor can be reduced.

Abstract: If the motor housing 5 is manufactured with a resin, the housing 5 becomes possible to be manufactured by injection molding, so that the housing 5 can be intended to lower the manufacturing cost by a mass production. Further, the counter measures for insulation such as covering a copper wire 7 with an insulating tape, interposing an insulator to an opening 5a of the housing installing an insulating shim between the coil 6a and the housing 5 become unnecessary. As a result, it becomes possible to expect a cost down of the spindle motor due to the reduction of the cost of the parts for insulating members and the mounting processes. And, further, since a vibration transmitted from the rotor 1 through the bearing and a vibration caused by an electric switching of the stator 6 etc. are diminished due to elastic absorbing function of the housing 5, rotation noise of the spindle motor can be reduced.

Abstract: A rotor assembly for an electric motor having a rotor shaft and at least one permanent magnet arranged on the rotor shaft. The rotor shaft with the permanent magnet is accommodated in a sleeve the rotor shaft being freely rotatable within the sleeve. The sleeve is closed off by a flange at a first end face. An inner-rotor electric motor having a stator and a rotor assembly of the type described above, with the stator being inserted over the sleeve of the rotor assembly.

Abstract: The invention concerns a spindle motor, comprising a stationary base flange that supports a central spindle, a hub that is positioned pivoting on the spindle with the aid of suitable bearings and on which at least on fixed-memory disc is arranged, wherein the hub has a rotor magnet on the inside circumference, and comprising a stator-side winding packet, which is arranged at the base flange and is positioned opposite the rotor magnet, wherein the winding packet is extrusion-coated completely with an elastic mass and is thereby connected to the base flange.

Abstract: In a disc drive with an integrated casting comprising the housing for the stepper and spindle motors, the transducer is mounted on a normal bearing pivot assembly lightweight actuator arm and biasing strip spring. One end of the strip spring is mounted to a block and the effective force of the spring is aligned with the actuator arm running toward the stepper motor. The other, or head end of the actuator arm contains a gear sector having gear teeth on its face which mesh with a pinion on a motor shaft so rotation of the motor shaft across the face of the gear sector causes movement of the head mounting arm. The actuator arm is formed of a self-lubricating polymer or other lightweight self-lubricating material. This way, wear on the gear is reduced; and as the teeth are worn, the gear is still tightly biased against the pinion to maintain accurate movement of the actuator arm with rotation of the pinion.