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JP2014166072A |
To allow exact rotation detection while suppressing power required for the rotation detection even when rotation of a rotor is slow and only a small induction signal can be obtained in such a case that a load is large.A stepping motor co...
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JP2014165995A |
To provide a pulse motor drive technique, with which it is possible to drive a pulse motor at a low speed with a simple structure.A pulse motor drive device includes a drive clock generation part for, based on a reference clock having an...
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JP2014161150A |
To provide a stepping motor drive unit capable of suppressing collision noise generated between connection sections while shifting a non-conduction state to an energization state.The stepping motor drive unit includes a stepping motor an...
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JP2014158334A |
To provide (a motor drive and a motor drive method) which can produce a high motor torque while suppressing vibration or noise.A motor drive of a two-phase excitation permanent magnet stepping motor includes a drive circuit for supplying...
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JP5578831B2 |
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JP5573660B2 |
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JP5573399B2 |
A diaphragm control apparatus in a camera body includes a stepping motor, a lead screw thereof, wherein a slider is driven by the lead screw, a position detector, and a controller. When the stepping motor is in a free state, the slider a...
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JP5573400B2 |
A diaphragm control apparatus in a camera body includes a stepping motor; a lead screw thereof, wherein a slider is driven by the lead screw; a position detector; and a controller. When driving the stepping motor by a predetermined numbe...
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JP5577293B2 |
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JP2014143775A |
To provide a motor control device that can ensure a start and reduce power consumption even in a low temperature environment.When starting to drive a motor (S101), a CPU of the motor control device acquires a result of temperature measur...
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JP2014133644A |
To prevent loss of synchronization in one-or-two-phase excitation and shorten waiting time since the suspension of rotation until the restart of the rotation even if an inexpensive stepping motor having a wide angle per step is used.A sh...
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JP5556709B2 |
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JP5558842B2 |
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JP5558670B2 |
A brushless DC motor configured to drive a driven member includes a rotor having a magnet, a stator having a coil configured to provide a rotational force to the magnet, a position detector configured to output a first signal that is per...
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JP2014128081A |
To efficiently improve the torque of a stepping motor.In a control device 20, a speed controller 215 outputs a signal indicating, among others, a desired value It of pulse current within a predetermined multiple of an upper limit value t...
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JP2014128070A |
To provide a motor controller capable of preventing a motor from spontaneously shifting to a direction of rotation opposite to the one in which it was rotating after stopping for loss of synchronization.The motor controller exerts contro...
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JP2014128082A |
To improve a pressing force.In a control device 20, a desired current setting section 220 sets a desired value It2 of pressing mode pulse current to be supplied to a stepping motor 32 in accordance with a desired value r of pressing forc...
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JP2014124000A |
To control driving of an actuator with high accuracy.There is provided a control device including: a memory for storing correction information set for each of rotational positions of a sensor magnet of a rotary encoder having the sensor ...
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JP5537565B2 |
The present invention relates to control of synchronous machines. A sensorless control system for an electrical machine is provided comprising a rotor and a stator having one or more phase windings for generating a rotating stator magnet...
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JP5539002B2 |
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JP2014117028A |
To provide a step motor drive system capable of performing stable reverse drive by excluding influences of friction or eccentricity caused by the quality of material of a step motor or manufacturing variation.A step motor drive system fo...
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JP5532596B2 |
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JP5532774B2 |
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JP5533907B2 |
A motor control unit determines whether a rotor of an electric motor is in rotation or not after the motor control unit is started up but before an initial operation, based on an encoder count value after the start-up of the motor contro...
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JP5528902B2 |
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JP5522008B2 |
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JP5523821B2 |
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JP5527181B2 |
To reduce the size of wiring connected to a drive source of an actuator, and to prevent the enlargement of a connector on a control substrate connected to the wiring.Switching contacts C1 to C4 of a changeover switch S1 are connected to ...
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JP5527365B2 |
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JP5523667B2 |
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JP5522933B2 |
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JP5511445B2 |
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JP5508623B2 |
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JP2014095641A |
To stably start/stop a sweep motor.When given an instruction to start, a control circuit 15 supplies a drive coil 13 with alternating pulse-like excitation currents I01 and I02 via a drive circuit 14, thereby generating a pulse-like alte...
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JP2014096900A |
To reduce a braking force in driving a stepping motor with a comb of driving pulses.A stepping motor control circuit includes a rotation detection circuit 108 for detecting a rotational status of a stepping motor 107, and a control secti...
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JP2014095852A |
To provide an optical device having a stepping motor which satisfies all requirements comprising low power consumption, positioning accuracy, and high-speed driving.An optical device includes; a stepping motor which moves lens groups; a ...
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JP2014096922A |
To provide a control method and control apparatus of stepping motor, and robot, capable of achieving complete driving with less electric power.The control method of stepping motor includes a first difference detection process for applyin...
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JP2014096901A |
To implement accurate rotation detection and maintain durability by changing a braking force in accordance with whether or not the rotation of a stepping motor is easy to maintain.A stepping motor control circuit includes: a battery 101 ...
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JP5496011B2 |
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JP2014090589A |
To prevent erroneous detection of a rotation situation or generation of erroneous rotation even in the case where a magnetic field is present.A stepping motor control circuit comprises: a rotation detection section which detects a rotati...
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JP2014090323A |
To provide an imaging apparatus which includes a change section for changing an imaging direction, achieves height of stop resolution of the change means without using a complicated mechanical structure, and appropriately achieves suppre...
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JP5489575B2 |
A motor control apparatus includes a stepping motor which includes a rotor and a stator, and a control unit, wherein, in a case where the stator is excited in a second excitation pattern before rotation drive of the stepping motor is sta...
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JP5489648B2 |
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JP5491207B2 |
A drive apparatus for a stepping motor, including: a current detecting portion which detects a current value of phase current flowing through a phase winding; a constant-current-controlling portion which constant-current-controls the pha...
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JP5494023B2 |
To provide an information processing apparatus, position control method, and program for controlling the position of an object to be operated, such as a stage in a microscope system, using a pointing device, and to provide a storage medi...
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JP5488279B2 |
To provide a head-up display (HUD) system for a vehicle which adjusts a display position of a virtual image on vehicle related information without giving discomfort to an occupant of the vehicle.A head-up display (HUD) system for a vehic...
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JP5490461B2 |
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JP5489738B2 |
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JP5487881B2 |
An original is read by an original reading unit configured to read image data, at least one of the original reading unit and the original is driven by a driving motor in a sub-scan direction, and, when an amount of the image data stored ...
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JP2014087161A |
To reduce erroneous determination of whether a stepping motor is rotating or stopping.The stepping motor drive device stops application of a voltage to a stepping motor 30 at a lapse of a predetermined time after a voltage applied to a s...
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