Abstract: A separately excited synchronous machine (1b1k) with an excitation circuit on the side of the rotor includes an excitation winding (3) and a power supply for the excitation winding (3) as well as a switching element (8a, 8e) for connecting the power supply to the excitation winding (3). Further, the synchronous machine (1b1k) comprises a first stator-side primary winding (5a5f) and a first rotor-side secondary winding (6a6f). Moreover, the synchronous machine (1b1k) may comprise a) a tap of the first rotor-side secondary winding (6d) connected to a control element (9a, 9e) of the switching element (8a, 8e) or b) a second rotor-side secondary winding (14d), which is coupled to the first stator-side primary winding (5a5f) and connected to a control element (9a, 9e) of the switching element (8a, 8e).

Abstract: In a shelf storage system (1) comprising at least two shelf units (1a-1d), wherein each shelf unit has a separate moveable shelf feeder device (5) with electric drive motors (6, 7, 8), and comprising an electric energy supply circuit (P, S1, S2, S3) which supplies the shelf units (1a-1d) with electric energy, the shelf feeder devices (5) are designed for recycling electric energy produced in their drive motors (6, 7, 8) by operating them as generators back into the electric energy supply circuit, with the electric energy supply circuit distributing electric energy recycled by the shelf feeder devices among the shelf units according to requirements (arrow ES1, arrow EP).

Abstract: A port cover is removably attached to a compressor to protect a port of the compressor. The port cover is integrally made of elastomer and has a cap member adapted to close the port, a cover member coupled to the cap member and adapted to cover a pipe fixing portion of the compressor, and a handle extending from the cap member. The cover member has a cylindrical portion faced to a side surface of the pipe fixing portion. The cylindrical portion has a specific portion extending from a first end of the cylindrical portion opposite to the compressor towards a second end opposite to the first end. The specific portion allows the first end of the cylindrical portion to be increased in diameter.

Abstract: An end assembly for a miniature motor. The end assembly including a brush base, a pair of brush arms supporting brushes, and a cover plate supporting a rotor bearing. The end assembly fits into an open end of a cylindrical motor housing.

Abstract: A winding end cap assembly for an electric machine with a stator and stator poles includes first and second end caps that are connected to opposite axial end surfaces of one of the stator poles. First and second inner winding retainer sections extend axially to connect an inner end of the first end cap to an inner end of the second end cap. The first and second end caps include an outer section, an inner section and a hub section that connects the outer section to the inner section. The first and second end caps and the first and second inner winding retainer sections define a continuous annular channel that receives and retains winding wire. First and second outer retainer sections connect the first and second end caps adjacent to the outer sections or the hub sections of the first and second end caps.

Abstract: This disclosure sets forth a dot matrix printer having an improved ribbon drive. The ribbon drive is provided by two respective stepper motors. When one stepper motor is in a take-up mode, the second is in a feed mode. The process is reversed proximate the end of the tape as it is unwound. A re-generative mode for the feed motor is provided and a resistance bank varies amounts of drag on the ribbon as it is fed from the feed motor spool. Both motors when in the take-up mode are driven by full H bridge drivers and amplifiers controlled by a micro controller through an address and decode input and output latch. In order to provide for a uniform velocity of the print ribbon the angular velocity of the take up motor is controlled by counting the zero crossings of the feed motor, and then loading it into the micro controller to compare it with a look-up table for purposes of providing a proper speed to the take-up motor and the proper peak drag through the resistance bank to the feed motor.

Abstract: A brake for a motor, particularly an alternating current motor with an electromagnetic brake is proposed for improving dynamic characteristics without increasing power loss, in which a brake magnet coil is subdivided at an intermediate tap into two partial coils, one of which is arranged in a freewheeling circuit.

Abstract: A solid-state motor control apparatus operative with a plurality of series motors to determine the selection of a power mode of operation and a brake mode of operation, and including a plurality of current sensors to establish the current flow in the motor armatures and in the motor fields.

Abstract: Disclosed is a tape-transport apparatus wherein a first brake is provided for a reel for winding a magnetic tape thereon, the reel being operatively coupled to a first DC motor; a second brake is provided for a reel for supplying the magnetic tape, the reel being operatively coupled to a second DC motor; means is provided which is adapted to impart the retarding force to the second DC motor when an electromotive force, which is generated by the rotation of the first DC motor due to its inertia whenever the power supply to the first DC motor is interrupted, is in excess of a predetermined level; and there is provided means which is adapted to operate the first and second brakes when the magnitude of the electromotive force reaches a predetermined value, thereby stopping the transport of the tape.

Abstract: Static switching device for two machines making it possible to effect antkid control during drive operation and the controlling of the braking torque during brake operation. It comprises two circuits in parallel on the direct current source, a first circuit comprising, in the following order, a first chopper, a first smoothing inductance, an inductance of the first machine, a first distributing thyristor and an armature of the first machine and a second circuit comprising, in the following order, an armature of the second machine, a second distributing thyristor, a second smoothing inductance and an inductance of the second machine, the two circuits being connected together by two connections arranged on either side of the said first and second distributing thyristors, each of the connections bearing a distributing thyristor. Applications -- Controlling of electric motors used for the propulsion of vehicles.