Abstract: The invention relates to a method carried out with simple means for determining the position of the rotor in a sensorless and brushless multi-phase electric motor (1) in addition to a device particularly suitable for carrying out said method. According to said method, a phase voltage (Uv) on the clamping side on said motor phase is to be detected after clamping a first motor phase (V) from the reference potentials (UZ,M) of an intermediate circuit (7) during a detection period (TE), via which the detection period (TE) determines a peak value (Uv*) of the detected phase voltage (Uv), the peak values (Uv*) are to be compared to the comparative value (Uc), and a positon signal (SP) is to be produced when the peak value (Uv*) exceeds the comparative value (U0).

Abstract: A cooling fan (1) for a motor vehicle has a fan wheel (4) and a brushless fan motor (2) which is used to drive the fan wheel (4). The fan motor (2) has an internal rotor (3). The fan wheel (4) is directly connected to the internal rotor (3) in order to reduce the size of the type of cooling fan (1) whilst retaining the power output.

Abstract: An electric motor (1) has a stator (3), a rotor (2) and a number of permanent magnets (6). The use of permanent magnets (6) having a cuboidal shape, without impairing performance. The stator (3) has a number of permanent magnets (6) having a cuboidal shape, which are embedded in recesses (7) and whose axial length (8) is greater than the axial length (4) of the stator (3).

Abstract: The invention relates to an electric motor and a method for manufacturing an electric motor for a motor vehicle actuator drive. The electric motor has a motor housing, a rotor assembly and a stator assembly. The stator assembly has stator teeth which are each provided with a notch in the region of their tooth back. A securing pin, which secures the stator assembly in the motor housing, is inserted into each of these notches.

Abstract: A cooling module includes a shroud (38) having an integral cover (42). The cover receives a bearing structure (40). A fan (36) is provided for moving air. A rotor and stator assembly (30) has an opened end and includes a stator (29) having permanent magnets. A rotor (31) includes a lamination stack (16), windings (21), a commutator (20); and a shaft (18). The rotor is associated with the stator so as to rotate with respect thereto. One end (34) of the shaft is coupled with the fan and another end (39) of the shaft is received by the bearing structure. A brush and connector unit (52) is associated with the cover of the shroud and includes brushes (58) associated with the commutator, and an electrical connector (62). The cover covers the opened end of the rotor and stator assembly and covers at least a portion of a brush and connector unit.

Abstract: An electromotor has an external stator, and a ventilator vessel which is used to produce a cooling air flow for self-ventilation of the electromotor. In order to improve the cooling of an electromotors, it is proposed to use a ventilator vessel to help direct an air flow along the outer surface of the motor housing, through the inside of the housing of the electromotor and through an air gap formed between the motor housing wall and ventilator vessel.

Abstract: The invention relates to a brush system for a motor-vehicle actuating drive, having a base body, a board on which interference-suppression components are mounted, and electrically conductive plug contacts. The plug contacts each have an accommodation slot. The board is inserted into the accommodation slots in the plug contacts.

Abstract: A cooling module 67 includes a motor assembly 42 having a motor case 24 having at least one open end and including mounting brackets 30 integral therewith. Each bracket has only a bottom portion 32 connected with the motor case. An armature assembly is disposed in the motor case and includes a rotatable shaft 46. A brush card assembly 56 is associated with the armature assembly, and an end cap 60 is disposed over the brush card assembly and partially covers the open end of the motor case and thereby defining a non end cap covered motor portion 63. A fan 64 is coupled to an end of the shaft and has a hub substantially covering one end of the motor assembly. A shroud 74 has a motor cover 76. Fastening structure 78 is associated with the shroud and engaged with the brackets thereby mounting the motor assembly to the shroud, with the motor cover substantially covering the end cap and the non end cap covered motor portion.

Abstract: A motor assembly (10) includes a permanent magnet DC motor (16) having a shaft (24) mounted for rotation with a face gear pinion (26) associated with the shaft. A jack shaft and clutch assembly (18) is associated with the face gear pinion and is constructed and arranged to prevent back drive of the motor under certain operating conditions. A spur or helical pinion (40) is operatively associated with the jack shaft and clutch assembly. A drive member (56) is operatively associated with the spur or helical pinion such that movement of the shaft and face gear pinion moves the spur or helical pinion to drive the drive member. A housing structure is defined by an upper housing (14) joined with a lower housing (12). The motor, the face gear pinion, the jack shaft and clutch assembly, the spur or helical pinion and the drive member are housed within the housing structure. Only one of the upper or lower housings includes mounting structure (25) constructed and arranged to mount the motor assembly to another object.

Abstract: A window lift system includes a motor drive assembly (10) constructed and arranged to control movement window glass of a vehicle, and a door module (35) to which the drive assembly is coupled. The door module has surface features (36) disrupting a surface (37) of the door module to reduce the transfer of vibration energy from the door module to the drive assembly or vise versa. In an embodiment, the door module includes a diaphragm (34) and the surface features are annular, undulating, wave-like features in the diaphragm.

Abstract: A gear mechanism unit for a motor vehicle actuating drive has a gear mechanism housing (1), an axle (2) which is fixedly connected to the gear mechanism housing, and a worm gear (5). The worm gear is provided at its outer periphery with a toothing (6). The axle, in its axial region which is provided for mounting the worm gear, has a region (2a) which is of larger diameter than its other axial regions (2e).

Abstract: To prevent damage to an electric machine (1), for example in a motor vehicle, due to axial loading of the rotor bearing in a simple manner, a cushioning element (11, 18, 22, 27) is proposed to absorb axial loading of the bearing system (6, 7), thereby also reducing the axial play (8) of the bearing system (6, 7). When the bearing system (6, 7) is axially loaded, the cushioning element (11, 18, 22, 27) serves to convert kinetic energy into deformation energy.

Abstract: A gear drive assembly (33) includes a housing (24), an external base (28) movable with respect to the housing, and an external gear member (12) associated with the external base. The assembly includes an internal gear member (14) surrounded by the external gear member and in meshing relation therewith. The assembly also includes a plurality of conductive polymer actuators (26) defining actuator sets. Each actuator set is coupled at one portion thereof to the housing with another portion thereof being coupled to the external base. Each actuator is constructed and arranged to deflect when voltage is applied thereto such that when voltage is selectively applied to the actuator sets, deflection of the actuators causes the external base to move causing the external gear member to move in an orbiting manner with respect to the internal gear member.

Abstract: An engine cooling module includes a shroud structure 12 having a shroud hub 46 constructed and arranged to receive a portion of a motor 16. A DC electric motor 16 has first and second ends and a rotatable shaft 40. The second end of the motor is received by the shroud hub. A fan 70 is provided that has a fan hub 72. The fan is coupled with the shaft for rotation therewith. The shroud hub 46 defines a protective cover covering the second end of the motor, and the fan hub 70 defines a protective cover covering the first end of the motor. Thus, no motor housing is required.

Abstract: A method of providing a housing assembly for a permanent magnet electric motor provides a frame holder having external surface features at an end thereof defining bearing support features. A plastic frame is provided over a portion of the frame holder. The plastic frame has internal surfaces features corresponding to the external surface features of the frame holder. The plastic frame has lamination receiving portions. Permanent magnets are placed adjacent to portions of the frame holder and between the lamination receiving portions of the plastic frame. A ferrous lamination is wound over the lamination receiving portions and the magnets to define flux structure.

Abstract: A window lift system (10) includes a support bracket structure (12) including gear structure (18, 20). A fixed rack structure (22, 24) is associated with the gear structure. A motor (16) is carried by the support bracket structure and the motor has a rotatable shaft. A gear train (28, 30, 32, 34) is associated with the shaft and with the gear structure such that rotation of the shaft moves the gear train, with the gear train driving the gear structure so as to move the support bracket structure with respect to the rack structure.

Abstract: In a method for improving commutation of the at least one phase (Pi) of an electric motor (1), the commutation angle (alpha) of the one or more phases (Pi) is continuously varied in accordance with the rotary frequency (f) of the electromagnetic energizing field (F) of the electric motor (1) and/or in accordance with an adjustable variable (S) which is characteristic of the driving power. A device (9) suitable for carrying out the method has a frequency converter 5) and a control unit (6) controlling the same and adapted to carry out the method.

Abstract: As an antilock system for a permanently excited electric motor drive, especially for a steering booster servo drive of a motor vehicle, in the event of a winding short-circuit, an interruption of at least one winding phase (MP1 or MP2 or MP3) of the winding affected by the short circuit is provided, by a separating means (T) triggered by an explosion directly or indirectly by the winding short-circuit. The antilock system advantageously has a separate neutral point connection part (MP) which is especially embodied as a sheet metal moulded part, is to be connected to the winding ends of the electric motor, and contains the winding phases (MP1; MP2; MP3) and the neutral point connection thereof as a single component. The antilock system is purposefully arranged on a front winding head of the electric motor and connected to the winding thereof.

Abstract: A dual fan module system 28 includes a two-speed electric motor 12 for operating a first fan 36, a one-speed electric motor 14 for operating a second fan 38, and switching structure K1, K2, K3, and K4 constructed and arranged to operate the system at more than two different speeds.