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JP2007060785A |
To favorably suppress radio noise generated when starting a DC motor equipped with a brush whose number of revolutions is controlled at a plurality of stages while achieving low cost and space saving.This vehicle motor control device for...
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JP2007060770A |
To provide a power supply device that can control the flow rate of a cooling fan, using a simple constitution.The power supply device 100 that feeds power to a drive system load 200 and a control system load 300 comprises a transformer 1...
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JP3891042B2 |
To provide a motor control device of a sewing machine that generates a motor speed as designed according to the amount of stepping of a foot controller. A power source 26, a fixed resistor 84, the foot controller 82 and a first variable ...
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JP3889325B2 |
To provide a motor drive unit capable of reducing noise by suppressing heat generation in a switching element without making a switching waveform sluggish. The motor drive unit 10 comprises a bridge circuit 15 to which a plurality of swi...
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JP3888133B2 |
To provide a rotation state detector for direct-current motor, where when the ripple components contained in the motor currents of direct-current motors having a brush are reduced, misdetection of rotation state is avoided. CPU 31 detect...
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JP3886780B2 |
To provide a control method for an electric power steering device capable of providing sufficient assistance by reducing difference with a target assist current even in a range where a target current is small. In the control method for t...
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JP3885920B2 |
To provide an electric power steering device properly securing data of a variable resistance value R, accurately carrying out estimation computing of the number of revolution ω on the basis of the data, and appropriately achieving contr...
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JP3887307B2 |
To accurately judge the lock state of a motor which is controlled in duty cycle, in a motor driving gear that comprises a motor control means for outputting a pulse signal where a combination of one on-state and one off-state is taken as...
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JP3888311B2 |
To exclude an application of a motor having large vibrations including low-frequency vibrations to a unit and to prevent the emission of noise by measuring the amount of magnetic vibrations of the motor itself at low cost. This motor vib...
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JP3885777B2 |
To positively detect a pulse signal of an initializing pattern regardless of a stopping position of a DC motor 110. This system includes a pulse generator 158 for generating a pulse signal in response to the rotation of the DC motor 110....
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JP3887967B2 |
To enhance riding comfort by suppressing vibration due to the control of a motor MG2 in a parallel hybrid vehicle. An engine, a motor MG1, a motor MG2, and an axle are combined through a planetary gear. The power outputted from the engin...
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JP3885595B2 |
To accurately obtain a final stop position of a drive member without the influence of elongations of wires connecting a DC servomotor and a valve for controlling the motor. A drive member 2 driven by a DC servomotor 1 is connected with a...
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JP3883662B2 |
To provide a motor control circuit which can supply a sufficient driving current under heavy load without requiring any semiconductor switch having high breakdown voltage, e.g. an FET, and thereby without increasing the size. The control...
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JP3885672B2 |
To avoid a fault occurring due to brush lees in an optical disk driver having a brush motor as a servo motor for moving a head. A disk-like recording medium driving device includes a spindle motor for rotating a disk-like recording mediu...
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JP3885389B2 |
To provide a low-cost state storing device which is easy to mount without requiring any sensor for detecting the rotation of a motor. This device is provided with a freely movable seat ST, a DC motor 11 which drives the seat ST, switchin...
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JP3882889B2 |
To provide a motor controller in a recorder provided with an option unit wherein the measurement and updating of a characteristic value C under a condition added with an option and a characteristic value A under a standard condition are ...
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JP2007043818A |
To provide a motor control unit capable of performing high-resolution control while suppressing noise generated during motor driving by PWM control using spectrum spread modulation.This motor control unit is composed of a current detecto...
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JP2007043771A |
To provide a simpler switching power source which can control the revolution of a cooling fan, according to the state of a load, without monitoring the load state and the fan drive voltage.This switching power source 1 comprises a switch...
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JP3879623B2 |
To reduce in size and to improve a calculating accuracy of a load drive circuit for controlling so that a mean voltage of a load for driving by pulse width modulated DC current becomes proportional to the duty of a pulse width modulated ...
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JP3881972B2 |
To certainly detect adhesion failure of a motor current detecting means in an electric power steering device. The electric power steering device detects an actual current IM1 supplied to a motor by the motor current detecting means, and ...
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JP3881856B2 |
To provide a protective circuit which enables the user to take a measure to counter surge voltage at power OFF of load in circuit structure where this circuit is applied while contriving the downsizing of circuit constitution and the cos...
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JP2007031125A |
To provide a printer so structured as to be able to perform the control with a high resolution and capable of suppressing the problem originating from a high frequency signal from an encoder using a simple constitution.A rotary encoder 3...
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JP3876685B2 |
To obtain current and phase to be used in actual process control, when setting the original position of a linear motor, so as to position, at a high speed and with accuracy, a portal stage whose shift is controlled by the use of the line...
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JP2007028757A |
To provide a motor controller whose configuration can be simplified with the production of high-frequency noise suppressed.In a fuel supply device 1, ECU 50 is provided with: a PWM signal generation unit 51 that generates a high-frequenc...
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JP3875882B2 |
To provide a drive control circuit of an electromagnetic drive device which can avoid electrical and mechanical damages produced when a power supply is turned on and off and has a long operation life. This drive control circuit has a dri...
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JP3874665B2 |
To reduce switching loss in a booster circuit while improving response of a motor by increasing supply voltage to a motor driving circuit. A microcomputer (a motor control unit) calculates a duty ratio Dc of a PWM signal which turns on a...
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JP3874807B2 |
A relay circuit is provided for operating a bi-directional dc motor including an H-bridge relay circuit having a first and a second relay. The first relay is capable of operatively engaging a first contact at a first time period to provi...
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JP3871334B2 |
To provide a forcing stop type motor driven cylinder which can control accurately a forcing power, using a simple operation by performing a size reduction/weight reduction/lifetime increase of an apparatus, and reducing the manufacturing...
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JP3872844B2 |
To provide a low power battery drive driver having extremely small diameter and producing a sufficient vibration in which vibration can be sensed easily by receiving not a regular signal but a continuous, intermittent or discontinuous si...
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JP2007009856A |
To provide a compressed air producing device less affected by weather fluctuation and capable of efficiently producing compressed air.This compressed air producing device is provided with an air compressor 6 producing compressed air by c...
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JP2007014112A |
To provide a technique to suppress creeping of a drive mechanism for moving a move part driven by a motor when the move part is fixed in position.A fixing device is for holding the move part in a fixing position where the move part is br...
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JP3868945B2 |
To provide a starting system of a motor that responds to variety of needs of use conditions by making variable the adaptable range of the fan motor by comparing a low-level voltage and a constant voltage value, and by setting a value of ...
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JP2007006678A |
To provide a fan power supply device capable of cooling a lamp to a proper temperature even when an AC power supply plug is pulled out or the like.The fan power supply device supplies DC power to a cooling fan 9 for cooling a light-emitt...
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JP3867582B2 |
To provide a drive circuit capable of preventing deviation in a cut-off frequency and easily setting an accurate cut-off frequency. The drive circuit uses drive signals outputted from an inverting amplifier (13) and a non-inverting ampli...
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JP3867270B2 |
To sufficiently secure a braking force until an electric vehicle stops by suppressing to the utmost the heat loss of a switching element that is induced when an operation frequency for PWM inverter control (inverter frequency) passes a z...
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JP3866067B2 |
To obtain a driving method of DC motor for moving a stopping sheet and stopping it at a predetermined point in which the sheet is stopped accurately at a target sheet feed position by the digital positional signal of an encoder having a ...
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JP3862907B2 |
To provide comfortable assisting force all the time, and to facilitate and quicken limitation for a current supplied to a motor for a general purpose vehicle. An electric motor and the like are prevented from being heated an being applie...
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JP2006345688A |
To provide a switch assembly for driving a load which is designed so that a load driving unit of different specification may be realized by a single module, and to provide the load driving unit having such switch assembly.The unit to dri...
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JP3861211B2 |
To provide a speed controller and a torque controller for a driven body which can perform the control of speed and torque even in the case that the speed of the driven body driven by a motor is low. The number of revolutions of load 2 is...
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JP3860466B2 |
To provide a motor driver whose power loss in an amplifier unit is small. A variable voltage power supply unit 13, which supplies a DC voltage interlocked with a terminal voltage of a servomotor M to an amplifier unit 12, is provided bet...
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JP3860716B2 |
To provide a control device for a shunt DC motor which can solve the problem at a drive start of the DC motor and start driving satisfactorily. A main motor output unit 50 applies a voltage corresponding to a command voltage to a field w...
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JP3859115B2 |
To make it possible to control the speed fluctuation of a printer motor as low as possible. This control device is provided with speed detecting parts 11, 90 that detect the speed of a printer motor 4 in a given cycle tv, an average spee...
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JP3859923B2 |
To provide a DC motor, an apparatus and a method for driving DC motor which control unbalance in generation of heat of brush to realize a small size and high output DC motor. For a DC motor having four or more brushes 11 to 14 and four o...
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JP3858982B2 |
To provide a control circuit for a motor in which a current flowing to the motor used for a camera or other precision equipment can be controlled more highly in accuracy. In a motor drive circuit 17, a transistor Q13 or Q14 is connected ...
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JP3856212B2 |
To realize a circuit protection at a power source reverse connection time with a small size and a low-cost configuration even when a specification is changed such as a voltage of a power source or the like is changed, in a driver having ...
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JP3857546B2 |
To provide a method of manufacturing a DC motor which can easily obtain characteristics at a low cost, and moreover can easily manufacture the DC motor at a low cost. In a rush current measuring process, the DC motor is driven with appli...
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JP3858423B2 |
To make time until the temperature of the first and second switching elements reaches the allowable temperature limit longer than conventional. Generally, chopped excitation is conducted in a switching mode which retains the ON of the se...
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JP3857613B2 |
To provide a motor pulse generation circuit which creats a rotary pulse according to a rotation angel of an armature with a simple configuration and at a low cost without use of extensive sensors or complex circuits. A motor pulse genera...
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JP3857543B2 |
To prevent high frequency noise and phase delay of rotation angle acceleration used for inertia compensation of a steering system. A low frequency region component of rotation angle acceleration αis acquired by applying a prescribed HPF...
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JP2006333691A |
To eliminate switching of a switching element at the time of controlling speed of an electric motor, to make an operation of a driven element smooth and to control speed and a rotation direction of the electric motor by a simple control ...
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