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JP2015027180A |
To switch a drive mode of a motor by a simple and inexpensive configuration.A drive controller 10 drives a motor 50. A drive mode switching circuit 16 included in the drive controller 10 compares input timing between an encoder timing si...
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JP5665383B2 |
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JP2015023695A |
To provide a motor control device capable of performing high speed advance angle control which is excellent in responsiveness.A motor control device includes: a stepping motor; position detection means for detecting the rotational positi...
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JP2015023700A |
To comparatively simply perform stable feedback control.A control apparatus of an actuator includes a Hall sensor 118 for outputting a signal corresponding to a rotational position of a stepping motor 114 and a lens CPU 120 for controlli...
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JP2015021807A |
To detect rotation reliably even in a low-power-consumption drive, thereby enabling stable drive.A stepping motor control circuit according to the present invention includes a control unit for driving the rotation of a stepping motor 107...
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JP2015021808A |
To detect rotation reliably even in a low-power-consumption drive, thereby enabling stable drive.A stepping motor control circuit according to the present invention includes a control unit for driving the rotation of a stepping motor 107...
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JP2015023644A |
To achieve stable driving by securely detecting rotation even in low consumption driving.A stepping motor control circuit comprises a control section that drives a stepping motor 107 by means of a main drive pulse P1 of energy correspond...
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JP2015023675A |
To highly accurately control the drive of an actuator.A control device comprises: a memory 123 that stores correction information set for each rotated position of a rotary encoder having an encoder magnet 108 attached to the rotation sha...
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JP2015023677A |
To avoid step-out in feedback control using an advance angle.A control device of a stepping motor 106a includes: an encoder 107; and a lens IC 111. The lens IC 111 is configured to calculate an advance angle and the angular speed of the ...
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JP5658475B2 |
A driving control apparatus for a stepping motor is provided by which the productivity is improved while keeping the driving performance of the motor at a required level. To accomplish this, a driving control apparatus of the present inv...
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JP5660851B2 |
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JP5661340B2 |
A driving apparatus has a correction value output unit for outputting correction values DeltaTa and DeltaTb to correct differences between signals which are output from an A sensor a B sensor when an A-phase coil and a B-phase coil are n...
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JP5658949B2 |
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JP2015015823A |
To control the amount of a current which can be supplied to a desired actuator when a plurality of actuators are driven simultaneously.A motor driving device that drives motors 1 and 2 simultaneously changes the duty ratio of the output ...
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JP5656675B2 |
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JP5656354B2 |
A drive apparatus includes a magnet rotor, a stator having a coil, a position detector configured to detect a position of the magnet rotor, a lead angle circuit configured to output a signal having a lead angle relative to an output of t...
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JP5654502B2 |
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JP5653789B2 |
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JP2015006062A |
To prevent a loss of synchronism of a pulse motor when performing initial phase matching, even when a load of the pulse motor is varied or even when the load of the pulse motor is light.A control method of a pulse motor comprises: a cont...
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JP5650476B2 |
A motor-drive circuit includes: H-bridge circuits in a pair each including first-source and first-sink transistors, and second-source and second-sink transistors, wherein a motor coil connected between a connection point of the first-sou...
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JP5647613B2 |
Provided is an electronic watch capable of, even if an indicating hand having a large moment of inertia is used, accurately determining success and failure of rotation. The electronic watch detects rotation by using a first detection mod...
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JP2015002615A |
To provide a stepping motor control apparatus capable of preventing loss of synchronism of a stepping motor caused by a sudden load and reducing power consumption, a sheet transfer device and a stepping motor control method.The stepping ...
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JP5646846B2 |
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...
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JP5645814B2 |
Method for operating a display device driven by at least one stepping motor with display scales, having the following steps: determining suitable step widths at least in ranges affected by stroboscopic flicker effects when driving in eac...
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JP2014239591A |
To provide a motor drive device which is easy to be handled and capable of controlling a coil current in simple configuration, and a power module.The motor drive device drives a motor in accordance with a first mode for increasing a curr...
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JP5642443B2 |
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JP5641638B2 |
An abnormality detection circuit monitors the sink current Irnf of a H-bridge circuit and determines the presence of an abnormal state if the sink current is not detected for a predetermined time. The abnormality detection circuit includ...
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JP5641774B2 |
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JP5637682B2 |
A drive control apparatus (118) includes a stepping motor (111-a) capable of performing a micro step drive having a predetermined division number by using a sinusoidal excitation current, a transmission mechanism (111-c, 111-d) configure...
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JP2014219231A |
To prevent a stepping motor from being erroneously detected that the motor is not rotating although it rotated, because a generated induction signal is small.The present invention is configured by having a rotation detection unit for det...
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JP5627340B2 |
A motor driving apparatus for constant-current control of a current of a coil of a motor includes a detector detecting the current, and a controller for controlling every first cycle to feed the coil until the current reaches a target va...
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JP5622532B2 |
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JP5615017B2 |
The optical apparatus including a motor to move an optical element, a position detector configured to detect a position of the optical element, a controller configured to control drive of the motor by using a position detection signal fr...
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JP5615099B2 |
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JP5616138B2 |
A stepping motor drive device includes: a first pulse generation circuit that generates pulses at rising or falling edges of a first clock signal; a second pulse generation circuit that generates pulses at rising and falling edges of a s...
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JP2014197965A |
To exactly control an operation amount even when a resistor of a potentiometer is partially worn.The gas apparatus, operating a flow control member so that preset fire power is acquired by controlling a stepping motor so that an output v...
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JP5601217B2 |
An expansion valve device includes an electric driver having a stepping motor so as to control an opening degree of a refrigerant passage by displacing a valve member in accordance with a rotation angle of the stepping motor. A controlle...
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JP5604663B2 |
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JP2014192918A |
To solve such a problem that a second digital signal has a phase lead ahead of a first digital signal due to failure, and a polyphase motor rotates reversely.A semiconductor integrated circuit includes a reverse rotation prevention circu...
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JP2014183624A |
To prevent a stepping motor, not rotating though, from being erroneously detected that a large induction signal is generated and the motor is rotating.A stepping motor control circuit comprises: a rotation detection unit which, by detect...
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JP2014181956A |
To securely rotate with less energy by carrying out appropriate correction drive when no-rotation is detected or when there is the possibility of erroneous detection of non-rotation despite the fact of rotation.A stepping motor control c...
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JP5594861B2 |
A motor drive device in which the torque vector of the motor is controlled so that the correlation between the number of pulses of a clock signal and the phase of the torque vector of the motor is held in common for multiple excitation m...
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JP2014171344A |
To improve a return speed after the step-out of a motor, in an imaging apparatus including a driving device using a stepping motor.The imaging apparatus including the driving device carrying out lens driving, diaphragm driving, or pan-ti...
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JP2014171277A |
To provide a motor drive circuit capable of avoiding generation of speed ripples in one rotation of an electric angle.A sinusoidal first signal 11a, a sinusoidal second signal 12a having a phase shifted from the first signal 11a by 180 d...
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JP5591508B2 |
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JP5591507B2 |
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JP5585114B2 |
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JP5585702B2 |
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JP5586701B2 |
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JP2014166086A |
To provide a motor controller and a motor control method which can suppress the malfunction of a motor relatively easily.A motor controller 10 includes a storage section 30, and a control section 20. A plurality of frequency division val...
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