Abstract: A motor is disclosed. The motor includes a first end bell, a second end bell and a stator with a stator coil disposed between the first end bell and the second end bell. A rotor with a rotor shaft is disposed relative to the stator, the rotor configured to rotate relative to the stator and the rotor shaft extending through the first end bell. The second end bell includes a chamber, the chamber includes an electronic circuit and a connector. The connector is electrically coupled to the electronic circuit and configured to receive both a control signal and a power signal from an external source.

Abstract: A motor is disclosed. The motor includes a first end bell, a second end bell and a stator with a stator coil disposed between the first end bell and the second end bell. A rotor with a rotor shaft that extends through the first end bell is disposed relative to the stator and rotates relative to the stator. The second end bell includes a first wall and a chamber, the first wall adjacent to the stator. The first wall includes a wire through hole to permit a plurality of conductors of the stator to pass through the first wall and into the chamber. A connector block with plurality of terminals is disposed within the chamber. Ends of each of the plurality of conductors are electrically connected to one of the plurality of terminals of the connector block. The wire through hole is filled with a sealant.

Abstract: A motor is disclosed. The motor includes a first end bell, a second end bell and a stator with a stator coil disposed between the first end bell and the second end bell. A rotor with a rotor shaft is disposed relative to the stator, the rotor configured to rotate relative to the stator and the rotor shaft extending through the first end bell. The second end bell includes a first wall and a chamber, the first wall adjacent to the stator. The first wall includes a wire through hole to permit a plurality of conductors of the stator to pass through the first wall and into the chamber. A connector block with a plurality of terminals are disposed within the chamber. Ends of each of the plurality of conductors are electrically connected to one of the plurality of terminals of the connector block.

Abstract: A step motor and servo motor indexer (10) having an improved user interface (14) wherein an input capability for programming a full range of program parameters and values is provided, yet where the user input system (20) has few components. The user input system (20) for programming the indexer (10) is characterized by having a data entry unit (26) which includes only a toggle device (27) and a rotary device (28), both of which may be combined into a single component part. In addition to the typical turned clockwise and turned counter clockwise modes of the rotary device (28) the use of the rate of rotation permits an additional input mode which is used to accomplish rotational or software ballistics to input large ranges of values during programming of the indexer (10). The user interface (14) further includes a display (22), for presenting program choices and values to user during programming, and for reporting running parameters.

Abstract: A three phase DC motor (10) including a rotor portion (12) and a stator portion (16). The rotor portion (12) includes 6N.+-.2 permanent magnet poles (32), and the stator portion(16) includes 6N electromagnet poles where N in an integer. The motor (10) is characterized in that it has a high pole density, thus enabling improved efficiency, while retaining acceptable non constant torque characteristics. Since the inventive motor configuration provides for a symmetrical winding pattern, no assymetrical radial forces are produced. The inventive configuration further allows for small motor size in the height dimension. A first preferred embodiment of the motor (10) is adapted for three phase power to be connected to the motor windings (50), (56) and (58) in a "Y" fashion. An alternate preferred embodiment of the invention (610) has coil windings (650), (656) and (658) connected in delta configuration.

Abstract: A two phase unipolar brushless direct current motor with asymmetrically arranged pole positions including a rotor portion (12) mounted upon a shaft subassembly (14) and rotating therewith with respect to a stator portion (16). The rotor portion (12) includes a field magnet (22) which is divided into alternately polarized zones (26) and (28) which are of dissimilar sizes, and a commutator magnet (38) to provide for electrical timing. The stator portion (16) includes salient pole positions (44) which are asymmetrically arranged around the circumference of the stator core.A latching hall effect sensor (82) is also provided to act as a commutator triggering element. The motor (10) is characterized in that the asymmetrical arrangement of its magnetic elements prevents there being a zero torque or a detent position. The primary usage of the motor (10) is in digital data storage devices.

Abstract: A single excitation phase pulse brushless DC motor (10) including a rotor portion (12) mounted upon a shaft subassembly (14) and rotating therewith with respect to a stator portion (16). The rotor portion (12) includes a first zone of steady state magnetization in the form of a main field magnet (24) divided into radially polarized sectors (26). The stator portion (16) includes the main stator stack (34) upon which the stator windings (38) are placed and a second zone of steady state magnetization in the form of a permanent disk magnet (46). The disk magnet (46) is divided into radially polarized sectors (48) similarly to those of the field magnet (24). A hall effect senior (40) is also provided to act as a commutator triggering element. The motor (10) is characterized in that the opposition of the first and second steady state zones of magnetization provides a steady state torque curve which urges the rotor (12) to rotate with respect to the stator (16 ) when it is in certain rotational positions.

Abstract: The invention is an improved performance step motor (10) including a shorted turn mechanism in the nature of a conducting ring (32) or one or more closed loop conductive strands (50) circumferentially disposed about a ring-shaped exposed magnet zone (48) in the rotor assembly (18) of a conventional hybrid synchronous inductor type step motor. The shorted turn device operates to interact with the magnetic fields created in a rotor magnet (40), a first rotor yoke (42) and a second rotor yoke (44) with the induced magnetic field generated in a stator assembly (24) including a plurality of stator pole pieces (62). The insertion of the shorted turn device results in a balancing of the magnetic fields in such a manner that the oscillation time required to bring the motor to stop at a desired position with standard back phase damping techniques or with no additional damping techniques is substantially reduced.

Abstract: The present invention is an improved brushless direct current (DC) motor for use in various applications, including disk drives in data processing applications. The improved motor includes a rotor portion, containing a ring magnet with alternately radially polarized zones, a shaft portion, a stator portion, having a stator stack, and conducting windings and power and control circuitry. The stator stack includes a plurality of poles, each pole having a greater amount of magnetic material at one end than the other end. The structure of the stator stack poles urges the rotor portion to detent positions from which it is magnetically driven to rotation upon application of winding current and further urges rotation upon current application regardless of rotor position. The improved motor provides an economical, reliable starting rotation motor which functions in an unimpeded fashion at normal operating speeds and is adaptable as a rotational motion source for a variety of applications.

Abstract: A tachometer assembly is provided for use with electrical rotary magnetic motors. The assembly includes a conventional brushless DC motor (12) having a radially polarized main field ring magnet (24) forming the rotor (16) about a stator (18). The tachometer portion includes a commutator ring magnet (26) formed on one edge of the main field magnet (24) and an axially displaced circuit board (14) including one or more unbranched conducting traces (40). The commutator ring (26) includes a plurality of alternately axially polarized segments (27) which induce sinusoidal signals in the conductive traces (40) as the rotor (16) is rotated with respect to the circuit board (14). The tachometer assembly is utilized to generate rotational velocity and analog positional data for manipulation and control of the motor (12). The primary uses are in servo control mechanisms in the data processing and computer peripheral industries.