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Matches 101 - 150 out of 11,384

Document Document Title
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...  
WO/2012/010169A3
The invention relates to a method and circuit assembly for controlling the motor current in an electric 3-phase motor, in particular in a 3-phase stepper motor, by means of a chopper process. For at least two of the three motor connectio...  
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...  
WO/2012/122895A3
A frequency multiplication inversion method and a control apparatus for an internal-combustion driven generator. An inversion unit employs frequency multiplication inversion technology, controlling the inversion unit through a low switch...  
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...  
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...  
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...  
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...  
WO/2011/026489A3
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 ...  
WO/2011/073742A3
An apparatus (Fig. 2), system (Fig. 1), and method (Fig. 7) are disclosed for stepper motor 102 stall detection. A conversion module 106 receives 1206 a back electromotive force ("EMF") waveform 1002 produced in a non-driven coil of the ...  
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...  
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...  
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...  
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...  
WO/2011/020744A3
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...  
WO/2011/119770A3
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...  
WO/2010/130802A3
The invention relates to a method for detecting blockages of unipolar stepper motors having one or more motor windings by analyzing the motor current supply, comprising the following method steps: - impressing an operating current accord...  
WO/2011/060783A3
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)...  
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...  
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 ...  
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...  
WO/2010/015819A3
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...  
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)...  
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.  
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...  
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...  
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...  
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...  
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 ...  
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...  
WO/2010/120430A3
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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)...  
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...  
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...  
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...  
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 ...  
WO/2008/084500A3
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...  
WO/2009/071267A3
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...  
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...  
WO/2009/034252A3
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...  
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...  

Matches 101 - 150 out of 11,384