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JP4003702B2 |
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JP4002894B2 |
A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by the ...
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JP3999672B2 |
A drive unit, in particular for a fan in motor vehicles, is indicated, comprising an electric motor (12) operated on a DC line (UBat), and comprising a device (13) for controlling the speed of the motor (12) by changing the operating vol...
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JP3997318B2 |
A control device for a DC motor driving a diaphragm pump includes a pulse generating integral circuit and a variable voltage setting integral circuit. The variable voltage setting integral circuit sets a pulse-base voltage at such a leve...
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JP3994956B2 |
To appropriately detect overload which may break a motor or deform a body and reduce the overload in the motor. The DC component of a load torque is derived from the sum of absolute values of a torque applied to a link connected to the o...
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JP3995835B2 |
To make it possible to control driving torque at high speed while reducing vibrations of a power unit in a vehicle with a motor in the power unit. When a torque command value is applied to an actual vehicle 41, a motor is rotated accordi...
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JP2007274771A |
To provide a direct-current motor whose number of revolutions can be detected wherein it is unnecessary to separately provide a terminal or a power source for generating pulses in proportion to its number of revolutions and complication ...
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JP2007274817A |
To provide a motor current detection device for calculating an actual motor current value even if a semiconductor switching element is PWM-driven in order to drive a motor. A microcomputer 1 which on/off-drives a plurality of FET3A to FE...
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JP3994029B2 |
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JP3994239B2 |
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JP3992793B2 |
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JP2007265995A |
To provide a power switch for a low-voltage electric motor having a simple structure. This power switch 10 for a low voltage range includes a contact pin 20, and one or more contact bushes 30. In the power switch, the contact pin 20 has ...
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JP3988871B2 |
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JP3989725B2 |
To provide a power unit that can ensure electric energy required when a power tool is operated, without increasing electric power to be generated, and a punch device with the power unit. An AC/DC converter 21 converts AC power supplied f...
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JP3988065B2 |
A power assist motor drive unit includes an H-bridge circuit (30), current detecting means (40), and current control means (20) for carrying out a PI feed back control according to a difference between the absolute values of a command cu...
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JP3988757B2 |
A motor control device includes: an operation amount setting unit that sets an operation amount of a motor for driving a driving target according to a predetermined driving signal; and a control unit that generates the driving signal. Th...
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JP3987968B2 |
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JP3987631B2 |
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JP3987613B2 |
A motor driver circuit (12) for providing drive signals to stator coils of a polyphase dc motor (10) includes a plurality of current paths, each connected between a supply voltage and a reference potential. Each current path includes two...
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JP2007253879A |
To provide an electric system of an engine automobile capable of preventing degradation of the lifetime of a battery, and suppressing the cost of a wire harness. The electric system of the engine automobile is constituted so that the dis...
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JP3986344B2 |
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JP3987233B2 |
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JP3985362B2 |
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JP2007245855A |
To prevent an occupant from being restricted by large tension by a webbing for a long period of time by converging an energization current to a target current at an early stage even when the energization current overshoots the target cur...
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JP2007245476A |
To promptly respond to a stick slip motion when a printing head performs the stick slip motion. A printer is equipped with the printing head that performs printing to a medium, a motor for moving the printing head, a guide part for guidi...
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JP3982861B2 |
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JP3980266B2 |
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JP3980273B2 |
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JP2007244033A |
To control a DC motor by using a constitution for driving a stepping motor. The DC motor controller 1 for controlling a DC motor 7 by using a state machine 3 for determining the state of a stepping motor, and a drive circuit 5 for supply...
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JP2007239676A |
To provide a hydraulic power unit capable of shutting off a contact of a contactor by responding to unexpected large increase of load and change of a current value due to change of the environment. Electric potentials on an input side an...
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JP2007237749A |
To secure the linearity of input data by precisely correcting a tolerance generated between both devices when switching the input data. This input data switching device adds a tolerance of predetermined-multiplied data after conversion w...
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JP2007244083A |
To provide a current control circuit capable of constantly optimally correcting a reference signal and outputting an appropriate current. The current control circuit 100 is a current correction circuit including: a reference level DAC 10...
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JP2007244172A |
To provide a motor drive apparatus, adapted to drive a motor with a high efficiency by causing an output voltage control of a power factor improving circuit to operate stably, while keeping superior responsiveness. Corrected value of the...
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JP2007244200A |
To perform speed control and constant output control of a direct-current motor without using a speed sensor. In a speed control device of a rotating electrical machine which uses a direct-current motor DM, uses a mounted battery as a pow...
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JP3978093B2 |
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JP3977657B2 |
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JP2007526734A |
The present invention provides a method for controlling the output power of a permanent magnet electric motor ( 102 ) using a control means ( 106 ). The control means ( 106 ) includes a means ( 134 ) for measuring motor speed ( 134 ) and...
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JP2007526735A |
The method involves feeding several input signals derived from a drive device (3) and representing a deceleration of the drive device displacement to the input level of a neural network with at least one buried layer. An output value cor...
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JP3974391B2 |
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JP3974278B2 |
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JP3973459B2 |
It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that in...
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JP2007228774A |
To provide a speed regulation device that controls the speed fluctuations due to load fluctuations within a single cycle operation, in a DC motor and a printer equipped with the DC motor. Even a small-sized printer equipped with a DC mot...
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JP2007228748A |
To provide a motor controlling device and a motor controlling method that make it possible to take an effective measures for heat generation without causing the enlargement of a device and a temporary stop of switching operations. The mo...
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JP3969222B2 |
To provide an abnormality detector of a motor drive system which can detect an abnormality of a sensor in a simpler constitution. A displacement sensor 15 detects a displacement of a drive shaft 20 driven by converting the rotation of a ...
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JP3972714B2 |
To detect an encoder failure such as slit chipping and slit clogging in a motor control device for rotatably driving a motor by means of position feedback control. A periodic counter for detecting the cycle of an encoder signal starts op...
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JP3969590B2 |
To provide a load drive circuit which can control generation of a radiating noise, when a motor is standing still. This coil load drive circuit 1 includes output buffers 11, 12 which output PWM pulses to both terminals of the motor 5; a ...
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JP2007221939A |
To provide a motor control circuit capable of rapidly and highly accurately detecting abnormal motor control for an apparatus to be driven to safely stop a motor. A counter 121 counts the number of pulses outputted from a linear encoder ...
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JP2007216663A |
To provide a drive control system used for a printer head and a drive transmission system of a printer. The device includes a path planning unit 30 which outputs a position command value and a speed command value, a feedback unit 31 whic...
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JP2007221940A |
To provide a motor controller capable of maximally exhibiting the torque performance of a DC motor depending on the variation of a rotating speed and a maximum current value, while preventing deterioration in control accuracy caused by u...
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JP3965588B2 |
To provide an inductive load controller wherein control is facilitated and it is possible to reduce a manufacturing cost, avoid the production of a spark at turn-on/off, enhance the reliability of circuitry, effectively protect a relay c...
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