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7626352 |
Control device for stepping motor
A control device for a stepping motor is provided that can reduce torque generated by a motor and control the expansion of a speed deviation when the rotational speed of a rotor exceeds a speed...
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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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7592770 |
Parking control technique for permanent magnet motor drives with sinusoidal BEMF
A method and system for controlling a current regulator motor control for parking a motor rotor in a predetermined position, wherein a first current command and a first angle command are supplied...
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7592759 |
Stepping motor servo driving method and driving mechanism
A servo driving method of the present invention to drive a stepping motor driven by a predetermined driving pulse, by a servo control method, is comprising a setting step of setting a driving mode...
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7586284 |
Synchronization control system
A synchronization control system includes plural controlling object apparatuses connected through first and second wired OR lines. Each controlling object apparatus includes a function of switching...
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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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7560893 |
Dual mode stepper motor
A method and structure receives a desired rotational speed and/or step frequency for an electric motor. If the desired rotational speed is above a predetermined limit, the method performs...
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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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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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7511440 |
Emitting direction control apparatus for lamp
An emitting direction control apparatus for a lamp is provided with: a driver for deflecting an emitting direction for a lamp; and a controller that control the driver to perform a deflection. The...
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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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7477033 |
Rotation drive system having a speed reduction device with elastic bodies
An input shaft speed signal for rotating a motor at a predetermined rotational speed is output from a rotation control unit to the motor. A rotational speed reduced by a speed reduction device with...
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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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7460774 |
Method to control image stabilizer
A stepper motor is controlled by a driver having a constant and maximum frequency input in order to correct for camera shake. The need for variable frequency devices is eliminated, thereby reducing...
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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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7436146 |
Stepping motor speed control method and apparatus suitable for the same
A speed control method of controlling a stepping motor to have a uniform instantaneous speed and an apparatus suitable for the same are provided. The stepping motor speed control method includes:...
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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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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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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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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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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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7339342 |
Stepper motor controlling apparatus and pen recorder
A stepper motor controlling apparatus has a driver which drives a stepper motor in response to an input pulse signal, a PWM controlling section which changes a duty ratio of the pulse signal fed to...
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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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7333400 |
Regulated low power control system for electrostatic actuators
The invention concerns a control system for a servomechanism comprising a control member that can move between first and second positions defining a variable electric quantity respectively between...
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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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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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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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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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7307398 |
Image processing device and method for controlling a motor system
A image processing device includes a first module, a motor system connected to the first module and capable of pushing the first module to move forward, a selector connected to a plurality of...
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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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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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