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Patent Searching and Data


Matches 2,401 - 2,450 out of 17,470

Document Document Title
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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....  
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...  
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...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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 ...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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 ...  
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...  
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...  
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...  
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...  
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 ...  

Matches 2,401 - 2,450 out of 17,470