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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...
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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...
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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...
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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...
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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...
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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...
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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...
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WO/2013/013725A1 |
A diaphragm pump (10), in particular for use as a detergent dosage pump, comprises a pump housing (12) with at least a first check valve (14) and a second check valve (16), a fluid chamber (18), a diaphragm (20) defining a wall of the fl...
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WO/2012/122895A2 |
The present invention provides a frequency multiplication inversion method and a control apparatus for an internal-combustion driven generator. The inversion unit employs the frequency multiplication inversion technology, controlling the...
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WO/2012/123393A1 |
The invention relates to a display device, comprising a microcontroller, a graphics controller, and a pointer driven by means of a stepper motor, wherein the graphics controller does not have an arithmetic logic unit and can be controlle...
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WO/2012/121902A1 |
A device for improving efficiency of an induction motor that soft-starts the motor by applying a voltage to the motor that is substantially less than the rated voltage then gradually increasing the voltage while monitoring changes in cur...
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WO/2012/102232A1 |
A drive circuit (100) for a stepping motor (200) comprises a D/A converter (120), a current control unit (130) including comparison units (131,132), and an error detection unit (170). The D/A converter (DAC) (120) generates target voltag...
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WO/2012/098593A1 |
Provided is an inductive load drive device having a simple structure and capable of reducing a current ripple against an inductive load having a low time constant. When a direction indication signal (DIR) indicates a first direction, a s...
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WO/2012/083891A1 |
A linear reciprocating device and a location controlling method utilizing the device are provided. The linear reciprocating device comprises a machine base, a linear guide(2) fixedly mounted on the machine base, a linear reciprocating lo...
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WO/2012/048976A1 |
The invention relates to a drive device for a medical pump, in particular an infusion pump or an enteral feeding pump, having a two-phase stepper motor for driving the medical pump and a control device for actuating the two-phase stepper...
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WO/2012/046693A1 |
The purpose of the present invention is to obtain a microstep drive control device for a stepping motor capable of reducing variations in torque due to the effects of detent torque without preparatory driving, even when a frictional torq...
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WO/2011/119770A2 |
A stepper motor driver system includes: a digital signal controller configured to digitally synthesize synthesized analog voltage signals that will induce a desired velocity of a stepper motor when applied to a pair of stepper motor wind...
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WO/2011/113806A1 |
In order to improve the energy efficiency of an injection device 100, a current is caused to be applied to a motor 113 of the injection device 100, which is related to a signal from a force sensor 115. The signal represents a force that ...
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WO/2011/099536A1 |
When recovering power from a motor driver, a forward voltage across a parasitic diode can reduce the recovery efficiency, and control of the power recovery can take an unnecessarily long amount of time. However, power recovery in the pro...
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WO/2011/060783A2 |
The invention relates to a method and circuit arrangement for controlling the motor current in an electric motor (M), in particular a stepper motor, by means of a chopper method, by means of which method/circuit arrangement the motor (M)...
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WO/2011/049568A1 |
A method for controlling multiple stepper motors with a single micro-controller output set uses a demultiplexer to split a single micro-controller output set into individual control signals for a plurality of stepper motors.
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WO/2011/043389A1 |
Provided is an electronic watch capable of, even if watch hands having a large moment of inertia are used, accurately determining the rotation and non-rotation thereof. The electronic watch detects rotation by use of a first detection mo...
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WO/2011/036291A1 |
A system (1) for the individualised management of a plurality of stepper motors (M(i,j)), each provided with respective coils (L1,L2,L3,L4), includes at least one pair of poles (2,3) associated with an electrical potential difference; an...
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WO/2011/036781A1 |
A rotating camera which consumes less power. The rotating camera is provided with: a torque control unit (53) which designates a drive torque of a stepper motor (M1) for rotating the camera; a rotation position detection unit (3) which d...
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WO/2011/033940A1 |
Provided is a motor control method that can rotate a motor to target coordinates in a short amount of time, even if the target coordinates are changed in small increments. The provided control method involves: obtaining the coordinates f...
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WO/2011/026489A2 |
The invention relates to a method and a circuit arrangement which enable a mechanical load applied to the motor shaft of a stepper motor (M) or a load angle of said stepper motor to be detected in a sensorless manner. The invention also ...
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WO/2011/020744A2 |
The present invention relates to a device for actuating and diagnosing at least two stepper motors (M1, M2,...), wherein the at least two stepper motors (M1, M2) each comprise at least two windings (W11 and W12 or W21 and W22), each of t...
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WO/2010/139098A1 |
A stroke-controllable actuating device includes a motion control mechanism, a position feedback mechanism and an actuating mechanism. The motion control mechanism comprises a stepping motor (6) and a control system (5) for the stepping m...
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WO/2010/120430A2 |
A calibration device for calibrating a motor for providing a substantially constant airflow in a ventilation system is disclosed. In one embodiment, a calibration device (664) includes an adjusting module configured to adjust an electric...
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WO/2010/076665A1 |
A circuit (18) for speed monitoring of an electric motor (14) comprises a circuit (106) for generating a time-frame signal, a circuit (106) for receiving a first signal (V g ) from a chopper driver circuit (16) designed to drive the elec...
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WO/2010/068988A1 |
An electric motor driven by the attraction and/or repulsion of magnetic materials, the motor including: a rotor mounted on an axis and being substantially circular, having a first series of circumferentially arranged rotor magnets; a sta...
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WO/2010/054680A1 |
An electrical stepper motor comprises a magnetical rotor and at least two electromagnetical driving coils for causing rotation of the rotator. A method of detecting an operating condition of the as e.g. a stall state of the electrical st...
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WO/2010/036149A1 |
The invention relates to electrical engineering and can be used in vibratory and impact devices, including devices for the artistic and ornamental processing of materials. The electromechanical vibrator comprises a stepper motor and a le...
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WO/2010/015819A2 |
The present invention relates to control of electrical motors and in particular, to the design and control of reluctance motors capable of micro-stepping position control. According to the invention there is provided a single stack varia...
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WO/2009/152796A1 |
The invention relates to a method for operating a display device driven by at least one stepping motor with display scale, comprising the steps: determining suitable step widths in at least those regions affected by stroboscopic flicker ...
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WO/2009/145036A1 |
Provided is a power transmission device for which there is no risk of the driving member breaking. The device has a stepping motor (driving member) (61a) that operates based on command signals from a control unit (70), a lead screw (61c)...
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WO/2009/114492A1 |
A stepper motor driven actuator that eliminates the need for a position sensor is provided. The stepper motor rotates a cam in a control piston valve. In a single nozzle embodiment, pressure balance is maintained by a spring preload on o...
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WO/2009/110602A1 |
Provided is an electronic watch comprising a limit circuit (116) controlled by a rotation detecting circuit (115), for limiting the output of a lock pulse (PL). At a rotation detecting time, an impact detection is performed to prevent th...
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WO/2009/111155A1 |
A low energy stepper motor driven fuel metering valve (FMV) that eliminates the need for a position sensor is provided. The stepper motor rotates a cam that replaces the flapper valve used in conventional systems. The cam rotation increa...
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WO/2009/101676A1 |
A motor drive device is provided with a switching element controlling current flowing in a first coil of a stepping motor having first and second coils, which are electromagnetically coupled, a rectification element conducted toward the ...
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WO/2009/086114A1 |
According to the invention, a method for determining the radial position of a rotatable object is disclosed. The method may include providing targets at known relative radial positions coupled with the object, where a radial distance bet...
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WO/2009/071267A2 |
For actuating a step motor, a pulse width-modulated current (S1) is fed to a coil (3) of the step motor and it is detected whether the current (IM) flowing through the step motor is within a current band width defined by an upper switchi...
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WO/2009/057407A1 |
A conveying apparatus comprises a) a motor which conveys a print medium, b) a print unit which prints on the print medium, c) a position detection unit which detects a rotor position of the motor, d) a first driving unit which drives the...
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WO/2009/034252A2 |
The invention relates to a method for powering an electromagnetic actuator (1) that comprises a fixed member (2) and a mobile member (6) having facing portions respectively provided with permanent magnets (7) and coils (4), wherein the m...
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WO/2009/033080A2 |
A method and computer program product for defining a PWM drive signal having a defined voltage potential. The PWM drive signal has a plurality of "on" portions and a plurality of "off portions that define a first duty cycle for regulatin...
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WO/2009/012542A1 |
Method for control of synchronous electrical motors with application for stepper and Brush-Less Direct Current motors for which there is an explicit relation between the active electrical power supplied to the motor and the mechanical po...
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WO/2008/155294A2 |
The invention relates to a method and a circuit arrangement for operating a brushless DC motor (10), having a rotor (14) excited by a permanent magnet and having different magnetic conductance values in different magnetic axes, particula...
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WO/2008/127826A1 |
A control apparatus for multiplexing a single distributed control amplifier to control multiple axes of motion in a multi-axis machine. In one example, the control apparatus comprises a distributed control motor amplifier, a first motor ...
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WO/2008/117744A1 |
A poly-phase load drive capable of driving a poly-phase load with a simple operation. A motor driver circuit (MDI) receives the supply of a control signal from each of first to fourth signal lines (SL1 to SL4) to drive a motor (M1). Firs...
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WO/2008/084500A2 |
The present invention relates to noise reduction in stepper motors during homing without compromising the torque. The proposed method is to drive the pointer (1) at rated voltage during forward direction and then continue to drive at rat...
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