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7615961 |
Control device for stepping motor
A control device for a stepping motor of the present invention stores setting data for controlling a state of the stepping motor in a data storage unit for each of a plurality of basic control...
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7612517 |
Stepping motor controller and gaming machine
A stepping motor controller includes: a pulse frequency adjustment circuit that receives a command pulse having a first frequency from an external controller that outputs the command pulse in...
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7606116 |
Analogue electronic clock and motor control circuit
The present invention can rotationally drive a motor with main drive pulses corresponding to loads with the simple constitution without using a counter circuit. A control circuit, in driving a...
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7583045 |
Stepping motor control apparatus, stepping motor control method and stepping motor control program product
There are included a control circuit to control sequence of excitation of a stepping motor, a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction...
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7583038 |
Motor-driving circuit and recording apparatus including the same
A motor-driving circuit drives a plurality of motors of different types. The motor-driving circuit includes a plurality of H-bridge circuits for outputting driving signals to the motors, a...
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7571907 |
Driving apparatus
In a driving apparatus, a drive force interruption/transmission device transmits or interrupts a drive force from a drive source, a load unit is operated by the drive force transmitted from the...
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7570007 |
Method of controlling stepping motor, apparatus for controlling stepping motor, and printer
A method of controlling a stepping motor including a stator having a driving coil wound therearound, and a rotor, the method comprising: performing a driving control of driving the rotor at a...
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7541768 |
Step motor control circuit and method of generating step motor control signal
A step motor control circuit that does not fix a reference voltage of a step motor control signal. The step motor control circuit may include a digital-to-analog (DAC) signal generator configured...
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7538513 |
Step motor drive circuit and analog electronic timepiece
A step motor drive circuit has a first transistor pair having first and transistors, a second transistor pair having third and fourth transistors, and fifth and sixth transistors connected in...
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7528568 |
Vector controller for permanent magnet synchronous motor
A vector controller for a permanent magnet synchronous motor according to the present invention has a motor constant identifying unit for identifying motor constants of the permanent magnet...
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7528567 |
Safety interlock system and method for disrupting stepper motor control signals
A method and a system are disclosed for preventing stepper motor control signals from being applied to a stepper motor drive circuit in order to stop a stepper motor when an interlock situation is...
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7495409 |
Method and apparatus for eliminating stall and cogging in multi-phase stepping motors
The lead or lag relationship between the stator and rotor of a stepper motor is monitored on a continuing basis by an incremental encoder, in feed-back relation, and adjusts the lead or lag to...
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7482772 |
Motor stop control device utilizable for gaming machine and gaming machine using the same
In the motor stop control device according to the embodiment, a main CPU is provided which executes any one of reel stop control process 1 and the reel stop control process 2 when the stop...
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7477028 |
Actuator control system
A system for maintaining appropriate control of an actuator in the event of a power disruption without being adversely affected by the period of the power disruption. The actuator may close during...
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7466461 |
Multi-purpose scan device using the same power source
A multi-purpose scan device using the same power source includes a flatbed scanner, an ADF, a motor, and a power-switching mechanism. The flatbed scanner has a scanning module and a power...
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7463004 |
Planetary dual stepper drives
An electrostatic marking system is provided having a power source(s) in each of its processing stations. A specialized power source is made up of two stepper motors in operative connection to a...
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7453230 |
Synchronization circuit and method of performing synchronization
The circuit comprises a pulse width modulated (PWM) input signal, a resistor, an instrumentation amplifier, a filter and an analog to digital converter. The method of performing synchronization...
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7439701 |
Method and device for detecting initial excitation phase of stepping motor
A method and device for detecting an initial excitation phase of a stepping motor is provided, by which an initial excitation phase of a rotor corresponding to a position of a stopper can be...
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7432682 |
Stepper motor stop and stalling detection method, and stop-detector-equipped stepper motor
A stop-detection method intended for a multi-phase synchronous geared motor that is controlled in a stepping mode, which measures the sum of the currents circulating in each of the N phases of the...
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7432680 |
Circuit and method for controlling motor
A motor control circuit for reducing current consumption. A stepping motor control circuit includes an A/B phase current setting signal generation circuit for generating an A/B phase current signal...
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7429846 |
Stepping motor control apparatus
A stepping motor control apparatus that is able to electrically detect the load of the stepping motor and effectively prevent step-outs by means of an inexpensive configuration. The stepping motor...
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7427848 |
Skew correction system and method of controlling a skew correction system
A system for correcting skew of a web of material being fed through a machine includes first and second pinch assemblies placed at a distance transversely to a direction of feeding. First and...
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7427847 |
Stepping motor controller, printer, stepping motor control method and stepping motor control program product
A stepping motor control method including: supplying hold current for holding a rotor of a stepping motor at a prescribed angle to the stepping motor as required while the stepping motor stops;...
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7421193 |
Digital motor control system and method
A digital motor control system utilizes time duration electric pulses generated by digital logic to control the motor speed and direction of rotation of a D.C. or A.C. motor. The digital logic...
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7414425 |
Damping control in a three-phase motor with a single current sensor
While a PWM-controlled, FET-switched three-phase motor is operating in a mechanical damping mode, a single current sensor is used to measure current in the motor. When mechanical feedback into the...
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7405532 |
Microstepper motor device and method of controlling the device
A microstepper motor device and method of controlling the device uses a microcontroller that provides current sinusoidal values from at least one array of sinusoidal values to power circuitry of...
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RE40370 |
Electronic watch
An electronic watch 400 which comprises a power supply 401 and a watch circuit 402 . The watch circuit 402 comprises an oscillator circuit 403 , a frequency divider circuit 404 , a drive...
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7379665 |
Driving device and light-amount adjusting device provided with the same
A driving device includes a stepping motor for causing the light-amount adjusting member to open and close so as to adjust an amount of light passing through an optical system. A driving range...
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7378813 |
Method and device for determining the zero position of a yarn guide capable of cross-winding
A system for determining a zero position of a yarn guide ( 25 ) of a textile winding device for cross-winding yarn into cheeses via a step motor ( 34 ). The yarn guide ( 25 ), acted upon by the...
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7362072 |
Method for controlling two-phase stepping motor
A method of controlling a two-phase stepping motor to operate in one of a plurality of operating modes in which output of the motor behaves differently upon encountering obstacle, comprises the...
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7355358 |
Configurable H-bridge circuit
In an implementation of a configurable H-bridge circuit, a high switch is connected to a voltage source and a low switch is connected to ground. The configurable H-bridge circuit includes a first...
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7352150 |
Stepping motor driving apparatus and stepping motor driving method
A stepping motor driving apparatus includes a detector that detects a current supplied to a winding included in the stepping motor, a first offset adding section that adds an offset to the output...
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7348753 |
Fan motor
A fan motor includes: a single-phase stepping motor including a stator excited by applying an electric current to a coil to function as a single-phase magnetic pole, and a rotor which has a...
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7345447 |
Adaptive current control system for a stepper motor
A method and a system are disclosed for adaptively controlling a stepper motor to produce a required torque output based on selection information provided by a sensor or a user/user interface...
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7342690 |
Method and apparatus for reading image
An image reading apparatus of the present invention can suppress an image distortion caused by the vibration of a carriage by varying at least one of the level of a current supplied to a drive...
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7342377 |
Stepping-motor control apparatus and method of controlling the apparatus
An excitation phase pattern used to manage only the number of phases being excited in W1-2 phase excitation, and an excitation phase pattern used to manage only the number of phases being excited...
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7332887 |
Image forming apparatus
An image forming apparatus includes a stepping motor that drives a rotor by rotating in accordance with an input of a drive pulse, a drive pulse profile storage portion that stores the drive pulse...
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7330009 |
Method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing motor oscillation
A method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing oscillation of the motor rotational speed are disclosed. A motor drive controller includes...
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7327116 |
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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7327115 |
Stepping motor control apparatus, stepping motor control method, and stepping motor control program product
There are included a control circuit to control sequence of excitation of a stepping motor, a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction...
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7324245 |
Rotating driving apparatus and image reading apparatus
In the present invention, an image reading apparatus and the like which is provided with a driving device ( 21 ) capable of changing its rotational speed, includes an inertial load changing device ...
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7323844 |
Circuit and method for control of a stepper motor
A circuit for the control of a stepper motor having a rotor configured as a permanent magnet and a stator configured of at least first and second energized excitation coils enclosing the rotor....
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7323839 |
Direct current motor controlling method
A direct current motor controlling method includes a mean for transforming a duty signal to computed value by a microprocessor unit. The microprocessor unit computes the computed value and then...
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7301300 |
Method and circuit arrangement for operating stepper motors
A method and a circuit arrangement for operating stepper motors or other appropriately dimensioned synchronous motors is disclosed in which between a first operational mode for normal motor...
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7298283 |
Device for detecting line-disconnection in stepping motor driver
A device for detecting disconnection for use in a stepping motor driver is provided having a driver circuit 3 which comprises a pair of windings 21, 22 wound in a bifilar turn arrangement; a...
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7283428 |
Step motor drive unit and analog electronic timepiece
To make it possible by a simple constitution to perform a forcible rotation drive by a correction drive pulse and obtain a demagnetization effect. In a case where a control circuit has judged on...
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7271554 |
Motor-driving circuit and recording apparatus including the same
A motor-driving circuit drives a plurality of motors of different types. The motor-driving circuit includes a plurality of H-bridge circuits for outputting driving signals to the motors, a...
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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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