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JP7029041B2 |
In a described example an apparatus includes: an FET driver circuit configured to supply current to a coil in a stepper motor, the FET driver circuit configured to regulate the current to the coil using a fixed delta current; a current c...
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JP2022029776A |
To appropriately control holding power of a stepping motor.A control device comprises: excitation means for exciting a stepping motor which drives a movable member of an imaging apparatus; acquisition means for acquiring movement informa...
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JP7011963B2 |
To provide an electronic timepiece which accurately positions a rotor of a step motor.In an electronic timepiece, a first correction reversal pulse 110 as a predetermined pulse for rotating a rotor by one step in a first direction is inp...
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JP2022026219A |
To achieve stable drive of a stepping motor regardless of individual differences in equipment equipped with the stepping motor.A motor drive control device 10 includes a motor control circuit 12 that generates a drive control signal Sd t...
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JP7009756B2 |
To make it possible to reduce the occurrence of various troubles associated with an increase in the number of input pulses in a holding operation before through-up of a stepping motor.A driver circuit driving a stepping motor comprises: ...
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JP7017075B2 |
To provide a combustion apparatus in which, when a short-circuit failure is generated in a stepping motor by means of such a resistance value that prevents an overcurrent protection circuit from being operating, the failure can be approp...
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JP2022018564A |
To easily prevent the occurrence of vibration and an increase in temperature.A stepping motor control unit comprises: a stepping motor 510; FETs 632, 633, 634, 635 that energize the stepping motor 510 and detect a current value; shunt re...
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JP7007442B2 |
To provide a printer which can improve print quality.A thermal printer 1 includes an MCU 24 which controls a value of an acceleration pointer 45 and decreases conveyance residual quantity by one whenever allowing a stepping motor 30 to p...
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JP6997732B2 |
To compensate for a detection value due to a current sensing resistance that can be disposed in a cold environment.A refrigerator includes: an electric damper driven by a stepping motor having windings, and disposed in a position where i...
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JP2022002448A |
To realize stable driving of a stepping motor while suppressing power consumption.A motor driving control device 10 includes: a target value setting unit 130 that sets a target current value In and a target rotational speed Rn of a stepp...
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JP6987527B2 |
A control device includes at least one processor which functions as an advance angle detection unit, a storage unit configured to store information indicating a plurality of loci each indicating a relationship between the advance angle a...
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JP6988971B2 |
To realize a rotation detecting device capable of realizing the accurate rotation detection of a rotator while suppressing power consumption.A rotation detecting device (6) detects rotations of a rotator of a motor (4) equipped with the ...
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JP2021197815A |
To prevent the occurrence of step out due to current shortage when adjusting the magnitude of a driving current according to an increase or a decrease in load torque.A motor control device includes a state sensor and a motor control circ...
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JP6985065B2 |
To provide a motor driving device and a rotation detection method of the motor driving device that can appropriately determine whether or not a motor rotates normally on the basis of an induction voltage induced by an induction current r...
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JP2021191222A |
To absorb the initial position deviation and obtain good controllability when the position feedback control of a motor is performed.A motor control device includes detection means 12 that detects the actual rotation position of a motor 1...
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JP6978972B2 |
To provide a step motor drive mechanism with which it is possible to detect an external magnetic field by a step motor itself without using a magnetic sensor that is a separate component and supplying an appropriate drive pulse in accord...
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JP6977479B2 |
A drive apparatus according to the present invention includes a stepping motor that transmits power to a rotating shaft of a conveyance roller, a brushless motor that transmits power to the rotating shaft of the conveyance roller, a firs...
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JP6970727B2 |
A method for correcting an angle sensor is applied to a step motor including an angle sensor, where the angle sensor rotates with the step motor, and the method for correcting an angle sensor includes the following steps: rotating the st...
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JP2021170858A |
To provide a motor driving device and a noise suppression method therefor, capable of dealing with an event each time the event such as noise causing a failure of motor driving control occurs.The motor driving device comprises: a switchi...
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JP6953289B2 |
To provide a motor control device capable of making a motor control correspond to a vector control system.A motor control device estimates each of an A/D converter detecting a current value on a ground side of a driving circuit that driv...
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JP2021164341A |
To perform synchronous rectification by a driving circuit of a stepping motor and prevent current from flowing in a reverse direction when current is small.A motor control circuit 2 includes field effect transistors Q1 to Q4 that supply ...
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JP2021164371A |
To resolve a cause of rotation unevenness and vibration of a stepping motor by synchronizing a period of chopping with a switching timing of an excitation phase.In a stepping motor drive device 40, a control unit 43 generates a chop cont...
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JP6943542B2 |
To provide a power swing detector for a polyphase pulse motor, capable of detecting power swing of a motor without necessity of modeling of an existing driving device.A power swing detector 31 is connected with the outside of a driver bo...
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JP6943953B2 |
A rotary drive for a medical device (10) includes a rotary motor (14) including a rotor (26). A rotary motion encoder (34) is connected to the rotor. The rotary motion encoder is configured to generate a number of encoder steps measuring...
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JP6946357B2 |
The motor control device is capable of driving control of the stepping motor with a pre-excitation that excites the stepping motor for a first time with a current lower than that during driving before starting or when starting driving th...
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JP2021148444A |
To provide a motor controller for a timepiece that can return the direction of a rotor to the original direction even if the rotor has been rotated in a normal direction by an impact.The motor controller for a timepiece is a motor contro...
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JP2021129405A |
To provide a driving circuit having improved followability for load fluctuation.A counter electromotive force detection circuit 230 detects counter electromotive force VBEMF generated in a coil of a stepping motor 102. A current value se...
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JP2021129358A |
To determine the presence/absence of abnormality by monitoring a current of a motor without using a current detection IC.An image forming apparatus includes a stepping motor, a driver circuit, a core member, a detection coil, a current/v...
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JP2021129351A |
To provide a motor driving apparatus capable of preventing vibrations of a stepping motor from being generated without varying revolution speed of the stepping motor, and to provide an image forming apparatus and an excitation frequency ...
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JP6928108B2 |
A control method and a control system (2), by which a motor (31) can be controlled. The control system (2) comprises a central processing module (22) and a drive control module (23). In a period in which a voltage is not applied to any p...
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JP6930143B2 |
To appropriately select a pulse that is suitable for current conditions from among a plurality of kinds of pulses to be applied to a stepping motor in an electronic clock.A drive device of an electronic clock 1 includes: a load; a drive ...
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JP2021520771A |
The method of controlling a polyphase actuator according to the present invention has a constant duration and amplitude A to define a sinusoidal voltage envelope.n, iPeriodic series of steps P withiRegarding the control method of the mul...
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JP6921616B2 |
A control device for controlling a stepping motor includes at least one processor which function as a control unit configured to control the stepping motor through a first control method or a second control method by using a control sign...
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JP6915133B2 |
To solve the problem in which, a current to be supplied immediately after a motor control method is switched may not be set properly, which results in motor control being unstable.Based on an integral value of an integration control unit...
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JP6912546B2 |
The present invention concerns a motor drive unit for driving a direct current electric motor comprising a moving part equipped with permanent magnets. The motor drive unit, which is powered by a voltage supply source, comprises a switch...
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JP2021107799A |
To provide a measuring device, and a measuring method that can easily execute the torque characteristics in a state where a load torque is made constant.A power transmission unit 2 of a measuring device 100 measuring the torque character...
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JP6904664B2 |
A motor connection detecting device includes: a bipolar stepping motor; a motor driver adapted to control current to be supplied to the bipolar stepping motor; and a controller connected to the bipolar stepping motor and the motor driver...
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JP6902016B2 |
Provided is an electronic watch including: a two-coil stepper motor (20) including: a magnetized rotor (21); a stator (22) including: first and second stator magnetic-pole portions, which are formed so as to oppose to each other through ...
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JP6900444B2 |
To solve the problem in which: in constant current control, load torque on a rotor may exceed output torque corresponding to a driving current supplied to a coil, which may put a motor into a step-out state.A determination is made as to ...
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JP6887857B2 |
A motor control apparatus that controls a stepping motor includes a calculation unit configured to determine a time with respect to a distance based on a theoretical formula expressing a parameter in an acceleration period or deceleratio...
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JP2021085987A |
To provide a lens device that is advantageous in low noise.A lens device (2) includes a driven member (4), a driving unit (5) that drives the driven member, a control unit (6) that controls the driving unit, and a storage unit (8) that s...
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JP6879820B2 |
The present invention aims to provide an apparatus and a method for driving a stepping motor which can realize high-speed drive while suppressing the heat generation or vibration of the stepping motor. The solution is a stepping motor dr...
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JP2021083154A |
To provide a motor drive device capable of shortening the time required from a rotor speed reduction starting time point to a stopping time point by performing speed reduction through feedback (FB) drive.A stepping motor 104a comprises a...
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JP2021080032A |
To suppress damage to a sheet or an occurrence of a burden on an apparatus, due to an unintended operation of a tray caused by phase matching of a stepping motor serving as a drive source for ascend/descend operations of a tray loading t...
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JP6870353B2 |
To provide an electronic clock capable of shortening a time until detecting a rotation stop state of a rotor of a motor.An electronic clock includes hands, a motor for driving the hands, a motor driving circuit 30 connected to a coil of ...
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JP6870410B2 |
To make it possible to switch a method for controlling a stepping motor.A motor control device according to one embodiment is a motor control device that controls a stepping motor on the basis of a first current command value depending o...
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JP2021071711A |
To solve the problem in which: when processing of determining the type of a motor is performed even if the type of the motor does not need to be determined, the time required for an image forming apparatus to become operable after a powe...
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JP2021061714A |
To provide a motor driving device that can prevent the generation of vibration in a stepping motor without changing the rotation speed of the stepping motor, an image forming apparatus, and an excitation frequency control method.A motor ...
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JP6859122B2 |
A printer (1) according to an embodiment includes a communication interface (105) that receives print data from an external device. A print head (111) prints on a sheet, line by line according to the received print data. A motor (107) dr...
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JP6859844B2 |
A sheet conveying apparatus includes: a plurality of driving parts each connected to one end of corresponding one of a respective plurality of rotating shafts; a first torque adjuster connected to another end of each of the plurality of ...
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