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7262575 |
Method and apparatus for precise positioning of an object with linear stepper motors
Methods and apparatus for precise positioning of an object using linear actuators based on linear stepper motors operating in microstepping or full step mode, a control algorithm based on...
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7253575 |
Industrial optical shutter
A highly versatile optical shutter for industrial and scientific applications is disclosed. The has a aperture which defines a light path through the shutter, and a shutter vane or blade that is...
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7239108 |
Method for stepper motor position referencing
A method for referencing a polyphase stepper motor by monitoring the current step response in at least one driven phase is presented. The coil current step response is compared to past step...
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7233119 |
Method and circuit arrangement for the sensorless determination of load states of synchronous linear motors
The invention relates to a method and to a circuit arrangement used to regulate synchronous linear motors, especially linear drive mechanisms in film drawing systems. The force (F clip ) between...
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7231139 |
Digital noise reduction for motors
A system and method for reducing fan noise by controlling the drive current to the fan motor. In one embodiment the system approximates a linear drive using a number of transistors in parallel and...
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7215091 |
Method for controlling a DC printer motor with a motor driver
A method of the invention is for controlling a DC printer motor with a motor driver during a potential stall of the DC printer motor. One step of the method includes detecting the start of the...
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7208905 |
Driving method, driving mechanism, and image capturing apparatus
The driving method of the present invention is a driving method to drive a stepping motor driven by a predetermined driving pulse, by the servo driving method, and is characterized in that a...
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7170254 |
Stepper motor driving apparatus
A stepper motor driving apparatus, includes a stepper motor; a driven member interlocked with a rotation of a rotor of the stepper motor, a stopper stopping the driven member in a zero position, a...
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7158259 |
Printing apparatus and method with a quiet mode
A printing apparatus drive control method is provided which allows the user to select a drive mode in which a printing apparatus can be operated with reduced operation noise whatever print mode is...
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7154245 |
Method to prevent midrange resonance during operation of a multi-phase step motor
The frequency of the pulse width modulator within a step motor control circuit is increased above a base frequency under defined conditions to enable more accurate construction of the phase current...
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7145308 |
Floating armature electric motor and method of assembly
An apparatus for converting electrical energy into mechanical energy includes a plurality of iron segments disposed in a circular, generally donut-shaped body that is substantially non-magnetic,...
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7145309 |
Open loop motor parking method and system
Provided herewith is an improved scheme for parking a load such as an indicator pointer and calibrating its position in a system for controlling the position of the load. The system also has a...
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7138784 |
Position command and pulse timing command optimization for step motors, using a position sensor
Optimized pulse commands are utilized for reducing vibration in a step motor, the optimized commands being created by correcting position, velocity, acceleration, deceleration, and movement...
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7134396 |
System to generate and control levitation, propulsion and guidance of linear switched reluctance machines
A translation system, applicable in trains, elevators, aircraft launchers, rail guns, conveyors, door openers, machine tools and servo drives, includes a first linear switch reluctance machine...
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7129671 |
Stepping motor drive device and method
A reference signal generation unit 110 a generates a reference signal VCA representing a limit indicator. Under the control of a PWM control unit 120 a , a bridge rectification circuit 130 a ...
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7129669 |
Motor controller, semiconductor integrated circuit, indicating instrument and method for controlling a motor
A motor controller comprising, a detector configured to perform a difference processing for information relating to a counter electromotive force and an induced electromotive force generated by a...
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7129670 |
Drive device for stepper motor and indicating apparatus using the same
A drive device includes stepper motors, each having an excitation coil and a rotor rotating based on variation in the excitation state of the excitation coil; driven members, each moving in...
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7116070 |
System and method for sensor less magnetic field control of a motor
A system and method for sensor less control of a stepper motor is described. The system and method includes estimation of the position of a rotor of the motor by way of sensing circuitry on the...
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7116074 |
Stepper motor accelerating system and method
A stepper motor accelerating system is used for accelerating a stepper motor from a current rotational speed to a target rotational speed. The stepper motor accelerating system comprises a...
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7112932 |
System-on-chip for high voltage applications
A system-on-a-chip (SOC) in CMOS technology capable to support high voltage applications has been achieved. The single chip system of the present invention comprises high-voltage circuitry, a...
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7103442 |
Motor driving apparatus, control method therefor, control program therefor, storage medium readable by computer storing control program and image forming apparatus
A CPU for a motor driving apparatus of an image forming apparatus excites a predetermined phase winding among plural phases of a stepping motor for a predetermined time period. Thereafter, before a...
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7095206 |
Switched reluctance motor control with partially disabled operation capability
Certain circuit faults in a phase of a multi-pole, switched reluctance, rotary electrical machine are detected; and the machine is selectively operated with a detected circuit fault when the nature...
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7088072 |
Motor control system
A stepping motor control system according to the present invention includes a counting mechanism for counting the number of steps of the pulse train command, a latch mechanism for holding a...
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7078839 |
Self-bearing step motor and its control method
The present invention relates to a self-bearing step motor, and more particularly, to self-bearing step motor system and a control method thereof, wherein a rotor can be supported by magnetic force...
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7061203 |
Method and related apparatus for controlling calibration of a stepping motor
A controlled stepping motor is electrically connected to a controller and a loading device. A method of controlling the stepper motor includes utilizing the controller to output a control signal to...
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7053584 |
Motor driving device
Disclosed is a driving device for a motor such as a stepping motor etc. for controlling an angle and a speed of the motor, wherein the driving device comprises exciting current detectors for...
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7053585 |
Gaming machine
The gaming machine according to the present invention has the reels 3 L, 3 C, 3 R on each of which a plurality of symbols are formed, the stepping motors 59 L, 59 C, 59 R for rotating and...
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7049785 |
Apparatus and method of controlling a stepper motor
An apparatus and method of controlling a stepper motor, includes a torque calculator to calculate torque operated on the stepper motor and to output to a controller a driving current setting signal...
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7034496 |
Pointing position correcting method, pointing position correcting apparatus, and pointing apparatus
A method of correcting a pointing position of a pointer rotated by a stepper motor includes the steps of: performing a prereset operation in which the pointer is rotated to a reset operation...
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7034495 |
Indicating instrument
An output port open control device ( 65 ) allows a port (P 3 ) which outputs PWM signals of a Cos+ side to be in a high impedance state in a period in which respective PWM signals of Cos+ and...
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7030587 |
Configuration of converter switches and machine coils of a switched reluctance machine
A system for controlling a switch reluctance machine is provided. The system includes multiple phases located in the switch reluctance machine, each phase having multiple machine coils. Each...
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7026781 |
Stepping motor driving system, information recording and reproducing device, and stepping motor driving method
A stepping motor driving system includes: a stepping motor that rotates at a predetermined angle according to a driving pulse signal, a vibration detector that detects vibration to output a...
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7023653 |
Floppy disk apparatus
A floppy disk apparatus improves power efficiency and quietness by commencing rotation of a stepping motor in a smooth fashion. The floppy disk apparatus includes an interface control circuit that...
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7023157 |
Stepping motor drive device and method
The reference signal generation unit 110 a integrates, in the integration circuit 3 , a staircase signal generated by the staircase generation unit 2 , and thereby generates a reference signal...
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7023165 |
Stepping motor control apparatus
A stepping motor control apparatus in accordance with the present invention comprises: a current detection unit that detects phase currents flowing into a stepping motor; an equivalent...
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7019481 |
Carriage driving apparatus and motor control method
A carriage driving apparatus that drives a carriage of a printer or the like by a motor and a motor control method for controlling the motor can substantially eliminate variation in control...
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7019484 |
Stepping motor driver
A stepping motor driver according to the present invention includes a torque component current calculating means for calculating a torque component current from phase currents and a rotor rotation...
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7019475 |
Motor stop control device for gaming machine and gaming machine provided with the motor stop control device
The present invention can accurately stop a reel at a target position and, at the same time, can offer a wide variety of reel stop process. A motor stop control device includes a stepping motor 70...
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7002316 |
Vehicle HVAC door with enclosed motor
A drive for a vehicle HVAC vent door includes a drive transmission mounted within the shaft for the vent door. The drive transmission is of the sort commonly known as a wave drive transmission,...
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7003373 |
Method and device for numerical control
A method and a device for numerical control of machine tools, robots, production machines and the like, is described, whereby complex and large task can be processed more easily. This is realized...
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6998813 |
Device for generation of a signal dependent on rotational speed for an electric motor, in particular for an electronically-commutated DC motor
The invention provides a device to generate an rpm-dependent signal, or a tachogenerator, having a plurality of magnet elements with alternating polarity which are arranged and distributed around...
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6998806 |
Motor stop control device for gaming machine and gaming machine with the same
In the gaming machine, when the motor drive instruction to drive the motor occurs based on an instruction from an external, a constant voltage is applied to the motor and the motor is driven...
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6997799 |
Damper including a stepper motor
A damper unit for an air circulation system. The damper unit includes a frame defining an air flow opening, a damper vane for opening and closing the air flow opening, and a stepper motor for...
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6992459 |
Stepping motor controlling apparatus and method, and image reading apparatus and method
Stepping drive control of a motor is effected by synchronizing interruption to a CPU with N (in number) line triggers set to N times of one-line of an image. Further, in a synchronous mode in which...
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6982815 |
Image reading apparatus
An image reading apparatus has a scanner device and an ADF mounted to be openable/closable relative to a document glass which is located on the scanner device. The ADF has a conveying roller for...
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6979973 |
Apparatus to and method of controlling step motor
An apparatus to and method of controlling a step motor by checking driving pulses to control the operation of the step motor and resetting the apparatus controlling the step motor when signals...
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6979972 |
Method and apparatus for detecting a stalled stepper motor
A method for detecting a state of an electric motor includes: energizing the motor with electrical power such that an associated current applied to the electric motor rises over time toward a...
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6972876 |
Image reading apparatus
The invention provides an image reading apparatus that produces a precise image of an original document to prevent the read image from having distortion or irregular density, by driving a DC motor,...
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6969930 |
Half-stepping motor with bifilar winding ratio for smooth motion
A half-stepping motor with bifilar coil windings about its stator poles has two layers of stator coils with different numbers of turns per pole for each layer. The ratio between the number turns is...
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6956351 |
Driving device for stepping motor
A driving device, includes a stepping motor having an exciting coil and a rotor; a driven member driven in accordance with a rotation of the rotor; a stopper mechanically stopping the driven member...
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