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JP2020096407A |
To improve accuracy in a load state determination.An angular velocity of a rotor and an induction voltage are calculated from a drive current value of a motor, and a ratio of an induction voltage constant Ke which is calculated therefrom...
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JP2020518224A |
The control system (2) and the control method for controlling the motor (31) are disclosed, and the control system (2) includes a central processing module (22) and a drive control module (23), and the drive control module (23). Acquires...
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JP6709465B2 |
To provide a game machine in which a vibration or a sound at a low speed rotation of a motor such as a stepping motor or the like is reduced with a simple structure and a low cost.Switching parts Sa and Sb are turned on by a main CPU 45 ...
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JP6711929B2 |
A valve actuator (10) has a damping circuitry including a capacitive damping circuit (37), which is activated in the event of generator operation of the stepper motor (18). The damping circuitry, together with the motor winding (26), for...
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JP2020089094A |
To provide a motor drive device capable of accurately stopping a rotor at a target position in a shorter time by performing deceleration stop of the rotor without performing switching from feedback drive to open-loop drive.A motor drive ...
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JP2020080621A |
To promptly start drive of a stepping motor.A filter part 136 smooths a PWM signal 141 generated by a PWM signal generation part 135 to generate DC voltage. A limiter part 137 outputs VREF voltage 139 obtained by limiting the DC voltage ...
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JP6699361B2 |
To provide a motor drive circuit with which it is possible to suppress an increase in the number of output terminals.A motor drive circuit 1 includes: a first control circuit 107d for outputting two first drive signals for driving a firs...
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JP6694271B2 |
To provide a multifunctional electronic apparatus that can achieve the overall size reduction of a plurality of units.The multifunctional electronic apparatus includes: a first pointer driving motor unit 5 having first stepping motors 57...
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JP2020068635A |
To achieve efficient driving of a plurality of motors.The motor drive apparatus includes a drive circuit part 1 formed by connecting n sets of series circuit parts in parallel to each other, which has a pair of switching elements (Tr1 an...
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JP6690331B2 |
To provide an electronic watch capable of effectively showing a user an arrival to a destination of a pointer when performing a fast forward movement of the pointer.The electronic watch includes: a pointer configured to rotate; and a con...
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JP6685256B2 |
To solve the problem that a drive current cannot be detected at fixed time intervals owing to the detection of the drive current passing through a winding wire of a motor with a timing depending on the duty ratio of PWM signals.In a moto...
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JP2020060301A |
To suppress the generation of particles, and to accurately adjust a flow rate of fluid.A flow rate adjustment device comprises: a valve body part having a flat valve body face 11a; a valve seat part 21 having a flat valve seat face 21a f...
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JP2020048362A |
To avoid step-out of an actuator such as a motor with a simple configuration.In a motor drive device, a CPU 101 drives a motor 1 by controlling a motor Dr 106 according to a control signal. A magnetic sensor 8 detects a rotational positi...
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JP6667925B2 |
Provided are an electrically operated valve control device and an electrically operated valve device provided with the same, with which it is possible for a deterioration in the accuracy of controlling a degree of opening as a result of ...
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JP6664154B2 |
To provide a motor controller that enables a motor to quickly reach a target driving speed.The motor controller includes a control section for controlling a motor speed by changing an energization phase of an excitation signal against a ...
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JP6665742B2 |
A load driving apparatus supplies an electric power to a load via a full-bridge circuit. The load driving apparatus detects a load current by a current sensing resistor. A controller in the load driving apparatus generates a drive signal...
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JP2020036492A |
To provide a motor which can use an IC by adjusting an assembled angle of the IC, when the IC housing an element which detects a rotational phase of a rotor within a single package is arranged and even when the IC is diverted for a motor...
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JP2020036515A |
To provide a motor driving device capable of preventing a motor from stepping out when switching the control from open-loop control to closed-loop control.A drive control unit 540 of a stepping motor 509 is configured to be switched betw...
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JP6652809B2 |
To provide an electronic timepiece capable of operating hands with rich expression while facilitating the setting of operation control, an electronic timepiece system, and a method of controlling an electronic timepiece.Hands 34, 36, and...
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JP6654800B2 |
The present invention provides a stall detecting apparatus for a pulse motor including: a control unit controlling the pulse motor; a movable unit moved by the pulse motor; a light blocking unit formed integrally with the movable unit; a...
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JP2020027175A |
To perform motor control for acceleration at low cost in a light quantity control device for performing light quantity adjustment.A light quantity control device opens and closes a diaphragm blade 121 by driving of a motor 110. A drive c...
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JP6651586B1 |
To suppress the generation of particles and to adjust the flow rate of a fluid with high accuracy. A valve body portion having a flat valve body surface 11a, a valve seat portion 21 having a flat valve seat surface 21a provided around an...
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JP6648063B2 |
A control device for a stepping motor gradually increases an absolute value of the excitation current in phase A from when the start until the end of the hold period such that the amount of change in the excitation current per unit time ...
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JP6641794B2 |
A motor driving apparatus (100) for causing drive current to flow in first and second armature coils (2, 3) of two-phases to rotate a rotator, includes a drive unit (200) configured to give first and second PWM pulse signals to ends of t...
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JP6642107B2 |
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JP2020018031A |
To provide a load monitoring system, a draft device, a spinning unit and a spinning machine, which can improve drive efficiency and suppress step-out of a stepping motor, and can inexpensively monitor a load torque of the stepping motor....
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JP6636794B2 |
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JP2020014280A |
To provide a motor control device in which, when voltage is low, reduction in output torque can be suppressed.In an integrated valve apparatus including a single motor, and a valve body part having a shaft portion which moves in the axia...
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JP2020012854A |
To allow a driving target member to be driven more accurately.A shutter device (100) includes: motors (Ma, Mb) having a full-step driving mode of applying a predetermined voltage to a coil and conducting a drive and a micro-step driving ...
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JP2020014279A |
To provide a motor control device in which initialization processing can be executed even in the case where information about an original point position is erased.In the case where information about an original point position is absent, ...
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JP6632642B2 |
A sheet conveyance apparatus includes a stacking unit having a sheet, a feeding unit, a conveyance roller to convey a sheet fed by the feeding unit, a motor to drive the conveyance roller, a phase determiner, first and second controllers...
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JP6622983B2 |
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JP2019213323A |
To provide a technique capable of quickly determining the presence/absence of occurrence of a disconnection in regard to a bifilar wound motor coil.A driving device 30 for a motor having a pair of bifilar wound coils L1 and L2, comprises...
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JP2019213327A |
To prevent the magnitude of current flowing into winding from exceeding a rated current of a motor driver IC in a case where the value of an excitation current component is controlled to be a value other than 0 when a motor is controlled...
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JP6616162B2 |
A two-phase rotating electrical machine control device which controls a two-phase three-wire type rotating electrical machine provided with two coils, wherein, prior to executing switching control to switch the orientation of an excitati...
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JP6613216B2 |
A motor control circuit (12) capable of performing a high-precision step-out determination under a wide range of conditions. The motor control circuit (12) includes an input voltage measuring unit (125), a temperature measuring unit (128...
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JP6613215B2 |
A motor control circuit includes an input voltage measuring unit, a temperature measuring unit, a current setting unit, and a current control unit. The input voltage measuring unit measures an input voltage input to the motor control dev...
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JP6608198B2 |
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JP6608001B2 |
Provided is an electronic timepiece, including: a step motor (8); a motor driver (7); a normal drive pulse generation circuit (3) configured to output a normal drive pulse (SP) at a designated drive rank; a rotation detection pulse gener...
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JP6603638B2 |
A rotational stop position of a motor is accurately controlled. A motor driving control device (100) includes a BEMF detection unit (118) for detecting zero-cross of back electromotive force of a motor coil provided in a motor, and a CPU...
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JP6603629B2 |
A motor control circuit includes an input voltage measuring unit, a temperature measuring unit, a speed setting unit, and a speed control unit. The input voltage measuring unit measures an input voltage input to a motor control device. T...
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JP2019193364A |
To shorten a time to detect an abnormality in a lifting device.The driving device drives a mechanism on which a drive load cyclically varies, and includes a stepping motor that drives the mechanism, a control unit that controls current t...
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JP6596345B2 |
A gripping device monitored based on CEMF and a method for controlling the same includes: using a controller to instruct a drive unit to rotate a stepper motor; using the controller to compare the control instruction with a control param...
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JP6592011B2 |
Provided is a drive circuit for a two-coil stepper motor, including a rotor (41) that is magnetized to an N-pole and an S-pole, first, second, and third stator magnetic-pole portions (42), a coil A, and a coil B. The drive circuit includ...
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JP6590495B2 |
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JP6591007B2 |
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JP6591471B2 |
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JP6585651B2 |
A motor controller capable of more reliably starting a stepping motor even if a predetermined drive power is supplied to the stepping motor, and to a control method for the stepping motor is provided. The motor controller driving a stepp...
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JP6585782B2 |
Provided is an electronic watch which achieves a highest-speed fast-forward operation of a step motor based on various environments under which the watch is placed, and enables low-power driving. The electronic watch includes: a normal p...
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JP6580859B2 |
A motor driving device and driving method of the same used to surely suppress the influence of counter electromotive force is provided. The motor driving device 100 includes an auto-decay portion 141. The auto-decay portion 141 controls ...
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