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8183733 |
Two-phase brushless DC motor
A brushless motor includes a two-phase winding stator having 4×n winding poles and auxiliary poles provided between the winding poles, and a rotor constituted by 6×n permanent magnet rotating p...
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8179081 |
Driver circuit
A stepping motor includes two coils and has supply currents to the two coils with different phases so that a rotor is rotated by the two coils. During a period where one coil is in a high impedance...
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8172199 |
Valve control apparatus and flow rate controller
A valve control apparatus including a stepping motor coupled to a valve and a motor control unit for controlling the stepping motor is provided. The motor control unit includes a motor control...
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8169171 |
Drive apparatus
A drive apparatus includes a magnet rotor, a stator having a coil, a position detector configured to detect a position of the magnet rotor, a lead angle circuit configured to output a signal having...
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8164295 |
Stepping motor controlling device, method, and storage medium
A stepping motor controlling device includes first and second clock signal generators, plural drivers, and a controller. The first clock signal generator generates a reference clock signal for...
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8148933 |
Circuit arrangement for load-dependent control of current flow time in motor windings of self-timed bipolar stepper motors
A circuit arrangement for automatic, load-dependent control of at least one winding current of a respective motor winding of a self-timed bipolar stepper motor, includes a first power driver...
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8138697 |
Sensorless speed detection during zero vector
A speed estimation method for determining the speed of a sensorless permanent magnet brushless motor having one or more phases driven by one or more stages of an inverter, each stage including...
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8139445 |
Stepping motor control circuit and analog electronic watch
A stepping motor control circuit includes a rotation detecting means which detects an induced signal generated by rotation of a rotor of a stepping motor, and detects a rotation state of the...
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8129934 |
Motor driver supplying drive current while adjusting decay rate thereof
A motor driver that supplies a drive current to a stepping motor includes a decay rate controller configured to mix a first decay rate and a second decay rate smaller than the first decay rate with...
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8125174 |
Motor driven electronic apparatus
A driving method of a high speed rotation stepping motor exhibiting good starting performance, its driving circuit, and a vibration motor and a fan motor employing them. The motor driven electronic...
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8111033 |
Stepping motor control circuit and analog electronic timepiece
The present invention aims to prevent a nonrotation state from being brought about even when a drive allowance is changed by variations in a stepping motor or the like. A pulse down counter circuit...
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8111032 |
Indicating instrument for vehicle
An indicating instrument for a vehicle includes a step motor including a field winding, a pointer, a stopper device for stopping the pointer, which is rotating in a zero-reset direction, at a...
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8102139 |
Indicating instrument for vehicle
An indicating instrument includes a step motor having a field winding, a pointer, a reduction gear mechanism having gears, a stopper device for stopping the pointer at a stopper position, a...
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8089239 |
Advanced method for stepper motor speed determination
A method and apparatus for determining speed of a stepper motor. In one embodiment of the method, a first terminal of a first coil of the stepper motor is coupled to an input of a multibit...
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8089238 |
Electronic device and monitor opening mechanism for an electronic device
A monitor opening mechanism includes a first rotating shaft rotatably connected to a host and having a first toothed portion. A stepper motor is disposed in the host and includes a second rotating...
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8090455 |
Motion control servo loop apparatus
A motion control servo loop apparatus, comprising: a feed-forward control module, and a proportional-integral-derivative (PID) control loop and a compensation adder. The feed-forward control module...
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8084969 |
Hall-effect based linear motor controller
A linear motion control device for use in a linear control system is presented. The linear motion control device includes a coil driver to drive a coil that, when driven, effects a linear movement...
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8080968 |
Drive control device for a stepper motor and drive control method of the stepper motor
A stepper motor control device includes a control device that controls an operation of a stepper motor. The control device implements a target rotational angle change computation process that...
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8072178 |
Image forming apparatus and method
An image forming apparatus including a stepper motor, a component attached to the stepper motor, and a controller to control the stepper motor. The controller controls the stepper motor to be...
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8067919 |
Drive control system of stepping motor and drive control method
A drive control device and a drive control method for a stepping motor are provided to reduce the number of parts and generation of vibration and noise by a stepping motor. The drive control device...
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8063603 |
System and method for using a stepper motor as a rotary sensor
A method and apparatus for driving a stepper motor and using the stepper motor as a rotary sensor when the stepper motor is not being driven.
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8064294 |
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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8040100 |
Automatically determining optimal pulse duration for a stepper motor
A system for calculating control pulse duration for optimal stepper motor performance. Duration of control pulses to a stepper motor is increased until stepper motor function begins. The duration...
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8030876 |
Stepper motor device with compensating non-sinusoidal driving values and method of producing the driving values
A stepper motor device uses compensating non-sinusoidal driving values to compensate for operational non-sinusoidal drive characteristics of a motor of the device due to at least design and...
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8004141 |
Two-phase brushless DC motor
The present invention relates to a two-phase brushless DC motor which can increase a pemerance coefficient of a rotor to the maximum to thereby improve efficiency and starting feature of the motor,...
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7995938 |
Toner agitating stepping motor control unit, image forming apparatus and stepping motor control method
A control unit is provided with an excitation current output section for outputting an excitation current to a stepping motor, a first level judging section for judging a drive stop time level...
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7986120 |
Pulse motor control device, control method, control program, and imaging apparatus
A pulse motor control device includes a drive pulse generator configured to generate a drive pulse in accordance with a set cycle, a pulse motor driver configured to generate an excitation current...
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7977909 |
Device and method of driving stepping motor of analog electronic clock
A stepping motor driving apparatus of an analog electronic clock, in which, when the rotation of a rotor is not detected after a pulse is supplied to a coil of a stepping motor, a first switching...
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7969108 |
Control circuit for a brushless DC motor and method therefor
A control circuit (120, 140) for a brushless direct current (DC) motor (160) includes a current drive circuit (140), a current loop regulator (122), and a commutation loop regulator (124, 126). The...
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7969115 |
Motor drive circuit and electronics
A drive circuit drives a motor in a mode selected from first and second modes. A drive unit operates in response to a control signal received from a signal generation unit to control how the motor...
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7948200 |
Motor drive device, image reading device, image forming apparatus, and motor drive method
A motor drive device drives a stepping motor having a rotor mounted on a rotating shaft with a capability of making a transition between a plurality of excitation modes. A motor control unit drives...
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7944778 |
Motor drive control circuit, semiconductor device, electronic timepiece, and electronic timepiece with a power generating device
A motor drive control circuit that operates using a primary power supply and controls driving a motor has a drive circuit that drives the motor, a power supply circuit that is disposed between the...
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7938382 |
System and method of step detection for a stepper motor
A stepper motor and controller are provided for controllably adjusting the angular displacement of a rotor. The stepper motor has a plurality of stator coils that are configured to effect rotation...
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7911174 |
Position sensing for rotor in hybrid stepper motor
A method and system are provided for sensing the position of a rotor in a hybrid stepper motor. First and second Hall sensors are positioned in a spaced-apart relationship with the first and second...
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7905373 |
System and method for generating a drive signal
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” portion...
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7898206 |
Stepping motor drive
A stepping motor drive is provided, by which a recoil movement of a driven member upon an initialization action can be reduced. The stepping motor drive includes: a drive signal supply means which...
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7893648 |
Stepping motor driving device, sheet processing device, and image processing apparatus
A stepping motor driving device drives a stepping motor according to a drive pulse of a step signal. A phase matching unit matches, at a time when there is a possibility that a rotor and a phase...
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7880423 |
Method and apparatus for stepper motor stall detection
A detector device and a method for detecting a stall condition in a stepper motor, wherein the characteristics of the back EMF are identified directly from a waveform of the back EMF, specifically...
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7880422 |
Image forming apparatus appropriately setting current value for driving motor
When a printing instruction is provided, a CPU causes a stepping motor M to drive a developer and calculates the value of a load of the stepping motor M before printing operations are performed....
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7868579 |
Micro-step driving method of stepping motor and electrically-driven device using stepping motor
In a micro-step drive and driving method of a stepping motor, the stepping motor generates a drive force for movement on a prescribed path of a moving unit provided in an electrically driven...
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7863851 |
Closed loop stepper motor control
System and method for controlling a stepper motor. A current position of the stepper motor may be received. A position error of the stepper motor may be determined using the current position of the...
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7859216 |
Stepper motor apparatus and method for controlling stepper motor
The object of the invention is to provide a stepper motor apparatus and a method for controlling a stepper motor, and particularly relates to a stepper motor apparatus for driving a pointer and a...
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7839111 |
Stepper motor control apparatus
A stepper motor apparatus controls a stepper motor by taking a maximum response speed and maximum response acceleration of the stepper motor into account.
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7834569 |
Type of stepper motor driver integrated circuit
This invention discloses a type of stepper motor driver integrated circuit, comprising of a control logic circuit module and a connected stepper motor driver circuit module. The outputs, in groups...
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7825619 |
Method and apparatus for controlling stopping of vibration generating stepping motor
A method for controlling stopping of a vibration generating stepping motor is a method for controlling the stopping of an vibration generating stepping motor by a control unit, characterized in...
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7821216 |
Motor control method and control device
When motor drive is initiated, firstly a PWM value at time of driving initiation is set to an initial setting value start_pwm1, and gradually increased by a specified amount in specified period....
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7816883 |
Return-to-zero control method for a stepper motor
In a return-to-zero stepping sequence for a stepper motor that drives the pointer of a gauge, steps that could potentially cause the pointer to flutter are modified. At least the initial potential...
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7812562 |
Method and apparatus for high speed stepper motor stall detection
A detector device and a method for detecting a stall condition in a stepper motor, wherein the accumulated value of the back EMF is compared to a stall threshold when the stepper motor has exceeded...
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7800335 |
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 are disclosed. A motor drive controller includes a drive motor, a...
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7795835 |
Step motor driving apparatus
A step motor driving apparatus includes a micro control unit (MCU), a pulse generator, a first step motor driver, a second step motor driver, and a communication port. The first step motor driver...
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