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Matches 51 - 100 out of 11,353

Document Document Title
WO/2017/051756A1
Provided is a stepping motor driving device that reduces the occurrence of loss of synchronism when a stepping motor is initially operated. This stepping motor driving device 10 is equipped with a triangular wave generation unit 30, a si...  
WO/2017/043629A1
Provided is a drive circuit (10) for a two-coil step motor having: a rotor (51); a stator (52) that has first, second, and third stator magnetic poles; a coil A magnetically coupled to the first stator magnetic pole and the third stator ...  
WO/2016/113227A9
The invention relates to an electric motor comprising a shaft and at least two plates secured to the shaft. An even number of pairs of solenoids is arranged around the shaft. On either side of the solenoids, one magnet per pair of soleno...  
WO/2017/022533A1
To achieve an optimal joint torque of a robot device through a simple task. A robot device according to the present invention is provided with a multi-joint arm mechanism having a plurality of joint parts (J1-J6). A motor driver (210) ge...  
WO/2017/017557A1
Methods of compensating for play and for initializing a position encoder in an actuation system (2) including an actuated system (8) comprising an elastic element, and an actuator (4) with a stepper motor (12) having at least one electri...  
WO/2017/011568A1
A sensor housing system is used to monitor the lifetime of a motor or other device. A protected housing shields a microprocessor and several sensors. The device communicates to a user information about the health of the motor or other de...  
WO/2017/002810A1
This weighing apparatus (1) is provided with: hoppers (4, 6, 9) having gates (5, 8, 10) with each hopper configured to receive an object to be weighed from outside and, after letting the object stay temporarily, discharge the object thro...  
WO/2016/207952A1
According to the present invention, if a feeder receives an instruction to determine whether or not maintenance of the feeder is required, the feeder controls the drive of a drive motor by setting, as a reference voltage Vref of a pulse ...  
WO/2016/180890A1
The invention relates to a positioning drive (15) and to a method for positioning an output element (16). The positioning drive (15) has a first stepping drive unit (21), which has a first stepping drive open-loop controller (22) and a f...  
WO/2016/170712A1
Obtained is a step motor control device capable of preventing step-out with a simple configuration. This step motor control device controls the angle of a step motor on the basis of an angle command, and is provided with: an angle comman...  
WO/2016/147511A1
Provided is a device for controlling a stepping motor, with which it is possible to reduce noise produced at the beginning of pulse output while minimizing any increase in cost and any decrease in the torque of the stepping motor. This d...  
WO/2016/147590A1
According to the present invention, an air-conditioning ECU (10) transmits a communication message in the format of controlling a stepper motor. Since the stepper motor and a DC motor are controlled by the communication messages in respe...  
WO/2016/139060A1
The invention relates to a method and a device for position determining in a rotatory electric step motor (1, 100) comprising a stator (10, 110) and a permanent-magnetic armature (20, 120) rotatably arranged in the stator (10, 110), wher...  
WO/2016/127611A1
A speed regulation method for a controllable fan, at least comprising: whenever a speed regulation device for a controllable fan makes a decision that a rotational speed of the fan needs to be decreased, if the speed regulation device fo...  
WO/2016/125383A1
The present invention achieves both highly accurate positioning control and high-speed speed control. The present invention is provided with a high-resolution encoder (11) for positioning control, and a low-resolution encoder (21) for sp...  
WO/2016/113227A1
The invention relates to an electric motor comprising a shaft and at least two plates secured to the shaft. An even number of pairs of solenoids is arranged around the shaft. On either side of the solenoids, one magnet per pair of soleno...  
WO/2016/104660A1
A drive circuit for a two-coil step motor having: a rotor (41) in which an N-pole and an S-pole are magnetized; first, second, and third stator magnetic poles (42); a coil A; and a coil B, wherein the drive circuit has: a drive-pulse gen...  
WO/2016/104737A1
This motor current control device has an inexpensive configuration and enhances motor current target value tracking. This motor current control device has an H bridge circuit that has a switching element and is connected to a motor coil ...  
WO/2016/096876A1
The invention relates to a method for driving a load device using a stepper motor. In said method, in which preferably a well-defined torque curve is to be obtained, actual step rates are adjusted to desired step rates in a time period t...  
WO/2016/078448A1
A rotation speed adjustment system for a fan. The system comprises a main control circuit (12) and a fan drive circuit (14), wherein the main control circuit is coupled and connected to the fan drive circuit and is used for generating a ...  
WO/2016/068175A1
The purpose of the present invention is to prevent a stepping motor from being unnecessarily stopped. This robot arm mechanism has a robot arm, a stepping motor (31a), a motor driver (31b), an encoder (31c), and an out-of-step detection ...  
WO/2016/034685A3
The present invention relates to an electronic device (1) comprising a processing unit (5) capable of generating a signal representing a physical quantity, of a motor (4) driving a display device, said motor comprising two terminals (Mot...  
WO/2016/052577A1
An electronic clock comprising: a step motor (30); a drive pulse generation circuit (5) that outputs a drive pulse SP for driving the step motor; a detection pulse generation circuit (10) that outputs a detection pulse for detecting rota...  
WO/2016/029908A1
A method and a circuit arrangement for operating a stepper motor (11) by commutating the coils of the motor in a manner dependent on the rotational position using chopped coil current pulses (CH12, CH34) are described, wherein an overlap...  
WO/2015/192831A1
A method and a circuit arrangement are described by means of which a stepper motor can be operated by an adaptive control across a broad rotational speed range, including standstill, in which the motor is electrically fixed in a specific...  
WO/2015/167822A1
Systems and techniques detecting a reverse current are disclosed. An apparatus comprises a switching circuit coupled to a load and a reference node. The switching circuit may be capable of conducting a reverse current from the reference ...  
WO/2015/163204A1
The origin (reference position) of a reflector moved by a stepping motor is determined without using a mechanical switch. This display device is provided with: a stepping motor (41); a concave mirror (31) that moves in accordance with th...  
WO/2015/128932A1
Provided is a stepping motor control device that makes it possible to position a stepping motor at a desired target position and reduce the power consumption of the stepping motor while in a standby state in which the position holding st...  
WO/2015/125792A1
The relationship between the rotational angle (θ) of an electric motor (11) and the magnetic flux density (Bs) detected by means of a hall IC device (22) is such that the difference (Ab) between a first magnetic flux density (BS1) and a...  
WO/2015/098261A1
The present invention reduces speed fluctuations by means of a simple method even if a stepping motor (100) having relatively large torque fluctuations is used. The present invention is provided with a drive pulse modulation unit (112) t...  
WO/2015/048156A1
A system and method for monitoring a level of material in a storage bin, including a gear train, a gear train shaft rotatably coupled to the gear train, a drive shaft, a coupling system to couple the gear train shaft to the drive shaft, ...  
WO/2015/037673A1
In the present invention, when the excitation of a stepper motor starts, a control unit first positions the phase of an excitation signal at a prescribed excitation start position, subsequently moves back the phase of the excitation sign...  
WO/2015/029737A1
The purpose of the present invention is to cut down the travel distance of a display image on receiving a stop instruction intended for a stepping motor and thereby reduce a feeling of strangeness perceived by a user. A display device (1...  
WO/2014/196561A1
This control device (1) that controls a stepping motor (3) by switching between open control and servo control is provided with a control unit (11) that reduces the frequency of switching to servo control and, when performing control usi...  
WO/2014/174557A1
The invention addresses the problem that the time required until current flowing through a coil is brought to zero is long. A motor drive device for controlling current flowing through the coil of a motor comprises: a comparison unit for...  
WO/2014/169061A1
Controlling a stepper motor. A stepper motor is driven towards an index position. An attempt is made to stop the stepper motor on the index position in a fashion that would ordinarily cause the stepper motor to ring at the index position...  
WO/2014/155797A1
The present invention provides a technique making it possible, even when a lens unit employing a diaphragm control method in which a stepping motor is used has a main camera body employing another method (DC auto control method, video au...  
WO/2013/160351A3
The invention relates to an apparatus comprising an electromechanical device, a control unit and a motion detector, wherein said electromechanical device is controllable by said control unit via a control signal, wherein said motion dete...  
WO/2014/103258A1
A motor driving apparatus includes a rotor, a first yoke including a first magnetic portion, a first coil configured to, if energized, excite the first magnetic portion, a second yoke including a second magnetic portion, a second coil co...  
WO/2013/157238A3
A head-up display device which can reduce heat generation and perform efficient control by controlling a drive current of a motor is provided. After a combiner is held in a display position, a microcomputer controls duty of drive pulse s...  
WO/2013/189492A3
The invention describes a method and a circuit arrangement for driving a 2-, 3- or polyphase stepper motor with prespecified current curve profiles, in particular for a microstep mode. In order to minimize the expenditure on memory for t...  
WO/2014/001545A3
The invention relates to a method for actuating a stepping motor, in which stator coils of the stepping motor are sequentially supplied with current by a control electronics unit such that a rotating electromagnetic field is produced, wh...  
WO/2014/050404A1
A motor control device (1) comprises: a communication unit (11) which receives a control command including a motor type identification signal representing the type of a motor (2) to be controlled and a signal designating the target rotat...  
WO/2014/017502A1
The present invention provides an electronic clock that is able to finely control the driving force of a normal driving pulse and suppresses variation in current consumption, without an increase in circuit size. The electronic clock is c...  
WO/2014/001545A2
The invention relates to a method for actuating a stepping motor, in which stator coils of the stepping motor are sequentially supplied with current by a control electronics unit such that a rotating electromagnetic field is produced, wh...  
WO/2013/189492A2
The invention describes a method and a circuit arrangement for driving a 2-, 3- or polyphase stepper motor with prespecified current curve profiles, in particular for a microstep mode. In order to minimize the expenditure on memory for t...  
WO/2013/102775A3
The invention is a driving mechanism for exerting a pre-determined torque characteristic, comprising a stepper motor (12) having a motor shaft, a rotation measuring device detecting the angular position of the motor shaft (14), a motor c...  
WO/2013/044912A3
The invention relates to a method and circuit arrangement for controlling and operating stepper motors with two or more phases, in particular during an acceleration phase (A) and/or a braking phase (D) of the rotational movement of the m...  
WO/2012/062310A3
The invention relates to a method and a circuit arrangement, by means of which a mechanical load applied to the motor shaft or a load angle of the motor can be detected without sensors in a stepper motor. This is achieved substantially b...  
WO/2013/065286A1
The invention simplifies the H-bridge circuit of the direct current motor for driving the dampers (doors) that switch the ventilation trunk in the indoor unit of an air conditioning device. The control device for an air conditioning devi...  

Matches 51 - 100 out of 11,353