Abstract: The present disclosure relates to a circuit device for demagnetizing the rotor of an externally excited synchronous machine and to a method for operating the circuit device.

Abstract: The disclosure relates to a method and a system for virtual visualization of objects and a platform control system included in the system, in particular for a virtual fitting room. Users can combine garments and accessories and watch the presented objects in a virtual environment in different perspectives. The system includes a rotatable platform with a control system thereof, wherein on the platform there is situated a spatial pattern. The rotatable platform is connected to an image or video capture device, which in turn is connected to a processing device. The processing device includes a processing module. The processing module comprises an input module, which cooperates with a comparator module. The comparator module cooperates with or without a coherence module, which in turn cooperates with a combination creating module for matching objects on the spatial pattern through a segmentation module.

Abstract: An amount of a motor drive current is controlled to an appropriate value. Two coils are provided, and a rotor is rotated by the coils by setting different phases for the supplied currents to the two coils. During a phase where one of the coils is in a high-impedance state, an induced voltage generated in the coil is detected. According to the state of the induced voltage, an output control circuit controls the amounts of the motor drive currents supplied to the two coils.

Abstract: A shift register which receives a transmission clock signal, which is shifted according to the transmission clock signal, and which outputs a gate signal a predetermined time after reset; a reset circuit which outputs a reset signal for resetting the shift register when the reset circuit receives an input of a step signal for driving the stepping motor; and a switching element which receives the gate signal of the shift register and which is switched between a blocked state and a conductive state are provided in a driving circuit of a stepping motor.

Abstract: A driving apparatus electrically drives first and second components built in an industrial instrument. The first component drives a first element, and the second component drives a second element at a velocity higher than that of the first component. The driving apparatus includes a housing including a supply inlet and an exhaust outlet. A fan forms an air current so that air is taken into the housing through the supply inlet and is exhausted from inside the housing through the exhaust outlet. A driving circuit block is accommodated in the housing so as to be cooled by the air current, and includes a first driving circuit to electrically drive the first component, and a second driving circuit to electrically drive the second component. The second driving circuit is inserted upstream of the first driving circuit along the air current in the housing.

Abstract: A motion control system and method are disclosed which provide improved pulse placement for smoother operation of a motion device such as a stepper motor. A placement of pulses may be determined for each of a plurality of time intervals such that the pulses are placed evenly across the plurality of time intervals, wherein the quantity of pulses in each of the time intervals is variable. The pulses may be generated and sent to the motion device to move the object to the desired position. A delay may be used to place each pulse at an arbitrary location within one of the time intervals. Where the desired step rate is fractional, time may be “borrowed” for one loop iteration from other loop iterations. In one embodiment, the step rate may be changed from one loop period to the next.

Abstract: A stepping motor preferably applied to an image reading motor for a facsimile device or the like, drives the rotation with low noise by repeating turning-on and turning-off switching of the driving voltage in the stepping motor when a change of the exciting phase in the stepping motor is not continued for a constant time and performing the repeated switching for a predetermined cycle. At the same time the present motor can prevent the passage of current through all of four phase coils by the manner that a pair of phases in the stepping motor are not simultaneously driven.

Abstract: A method and apparatus for controlling a low volume, low rate precision dispensing pump for photochemicals and the like comprises generating constant current signals having magnitudes related by sin and cos values to the angular step size of the stepper motor pump, and varying the magnitudes smoothly over an incremental range of angles to vary the quantity of liquid dispensed. The step size and step rate can be varied to provide a desired liquid dispense rate. The magnitude of the current applied to the motor is ramped up and down while maintaining constant the relative relationships in the magnitudes of the currents applied in order to smoothly step the motor over a desired step angle.

Abstract: A self-synchronous electrical motor comprises one rotor, one stator formed by at least one set of four stator windings, at least one electronic switch connected to a stator winding to control the current in the stator winding and a sensor of the angular position of the rotor to control the working of the switch. It also has a rotating commutator device, driven by the rotor, to shunt a current coming from a power supply source into windings selected as a function of the position of the rotor. The commutator device is connected to a first end of each of the windings, the second end of two of the windings being connected to the power supply source and the second end of the other two windings being connected to the electronic switch. Application notably to electrical traction systems for automobiles.

Abstract: A low-power dual voltage drive circuit and method which includes controlling a stepper motor overdriven with a high voltage. The stepper motor drive circuit includes a high voltage supply for overdriving the stepper motor, a low voltage supply, and an overdrive switch mechanism connected between the high voltage supply means and the stepper motor input. The method includes repetitively triggering the overdrive switch in response to a control signal, overdriving the stepper motor with the high voltage, producing an overdrive current, sensing the overdrive current, producing an additional control signal when the overdrive current reaches a preset value, switching off the overdrive current in response to the second control signal, resetting the overdrive switch to enable the overdrive switch to again receive the first control signal, and driving the stepper motor with a nominal low voltage.

Abstract: A device for tracking a movable body along a linear path parallel to a plane includes a linear motor for driving the body along the linear path. The body is mounted, as by rollers, for movement along a guide, such as a pair of parallel guide rails, supported on a base which also supports the motor. To enhance stability of the body during tracking movement, the rollers or other mounts for the body are urged against the guide by the magnetic action of a flux which is separate from the principal flux used to generate thrust for the linear motor and which provides an attractive force against preferably a pair of members, such as steel plates, of high magnetic permeability fixed to the movable body.

Abstract: A Coil Density Modulation (CDM) for the control of alternating current motors which controls the speed of the rotating magnetic field produced in the armature of the motor controlled. The magnetic flux wave components produced in the phases of the motor armature having the sine-approximated waveforms are synthesized by controlling the number of parallel turns of coils of the armature phase winding that are activated to produce magnetic flux by connecting them to a DC power source in sequences disclosed. Also the mechanical and electronic devices for the disclosed CDM method of motor speed control, together with the CDM motors for the CDM drive systems.

Abstract: A single phase or multiphase dynamo electric machine including a stator having at least one winding arranged to be energized to provide an alternating flux, and a further member, e.g. a rotor, movable with respect to the stator and having at least one short circuited winding, providing at each position of the movable member alternative paths of low and high reluctance to the passage of alternating magnetic flux, to cause the movable member to adopt a position in which linkage of the short circuited winding(s) with the stator winding(s) is minimized. The machine operates as a rotary solenoid or where the stator windings are in quadrature, as a double acting solenoid. The stator windings may be short circuited to increase the self aligning torque or where three stator windings are provided, by energization of one stator winding and by connecting the non-energized stator windings in opposition, again the self aligning torque can be increased.

Abstract: A single phase or multiphase dynamo electric machine including a stator member having at least one winding arranged to be energized to provide an alternating flux, and a further member, e.g. a rotor, movable with respect to the stator and having at least one short circuited winding providing at each position of the movable member alternative paths of low and high reluctance to the passage of alternating magnetic flux, sensing means for sensing the relative position of the two members, switching means actuated by the sensing means to cause the movable member to lock in position relative to the stator at a null position and to effect successive energization of the stator winding at other than the null position to effect continuous movement of the movable member past the stator.

Abstract: A multiple contact rotary switch comprises a rotatable staff to which an armature is electrically and physically mounted. A plurality of pins is spaced equi-radially away from the staff and around the staff, and the armature is arranged to move past each of the pins in turn as the staff rotates. The armature is flexible and spring-like, so that it maintains contact with any one pin for as long as it can, then springs forwardly to contact the next pin. A low power SPDT switch is thereby provided. The switch may operate extremely slowly, with no switch contact dead-break or teasing.

Abstract: A logic system for controlled energization of predetermined stepper motor phases for various optimal times employing a read only memory having a plurality of memory element arrays corresponding to predetermined stepper motor sequencing commands corresponding to all possible tilt position change attempts for a print head. The memory element arrays are addressed by a shift register which stores data representative of the previous print head tilt position and the destined print head tilt position as provided by a two bit latch. The addressed memory element array is sequenced by a counter incrementing the read only memory address provided by the shift register at various predetermined optimal time intervals provided by a timer which is preset by individual preset values stored in the memory element now being addressed.