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JP3925098B2 |
To rotate an ultrasonic transducer by two types of operation modes by providing a two-stage press switch and to extremely facilitate the changeover of the operation mode in a stable state. A switch box of switches 27 and 28 has a spring-...
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JP3927434B2 |
To optimize responses to any operation request by preventing overshoot in responding with actual manipulated variable when a value of a manipulated variable exceeds a prescribed line voltage, without sacrificing response with the actual ...
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JP2007130441A |
To eliminate inconvenience of passively opening/closing a lid in a case module of an auto-folder function automatically controlling the opening/closing of the lid of the case having a storage space.This case module includes a motor 200 o...
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JP3922100B2 |
To provide an actuator for a drive switching unit capable of determining whether an FET is in a normal state or not while decreasing the number of part items as small as possible. A CPU 41 that constitutes a drive mechanism 40 of the act...
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JP3920214B2 |
To provide a PWM controller which can suppress the revolution ripple of an electric motor caused by the switching of the drive voltage of a switching circuit. This PWM controller is equipped with a voltage switching circuit 23 which calc...
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JP2007513595A |
A switched DC rotating electrical machine ( 100 ) comprising a stator ( 3 ), a rotor ( 2 ) and switching means ( 11 a, 11 b , 18 a , 18 b), an excitation winding ( 5 ) associated with one of the stator ( 3 ) or the rotor ( 2 ) having a p...
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JP3917556B2 |
To provide a means of efficiently operating a motor, by adjusting a quantity of use in DC motors. A method of controlling the DC motor 22 is disclosed. In tracking operation 58, an input 28 to the motor 22 is tracked 58. In comparing ope...
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JP3916762B2 |
To obtain a PWM drive control circuit in which spike current can be suppressed surely upon turning a plurality of output circuits on. The PWM drive control circuit comprises output circuits 101, 201 being connected with respective induct...
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JP3917305B2 |
To provide a trusty motor coil current detecting circuit by dissolving the delay of the trailing of the motor coil current to a current command value, and removing the switching noise, and a trusty current control type of motor driving c...
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JP3918832B2 |
To provide a motor driving device which can suppress the rotation decrease of a DC motor and the lack of output torque caused by the generation of a surge voltage. When a reverse current route 45 by a flywheel diode D connected in parall...
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JP3917803B2 |
To provide a power window device with a less erroneous action by certainly detecting a clamping-in during the time until a stable action is carried out from the time of motor activation starting. The power window device is provided with ...
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JP3917080B2 |
To decide the fault state of a motor due to the influence of a disturbance voltage without adding a hardware by estimating the disturbance voltage from a target voltage and a real current of the motor. A motor fault detector for a motor-...
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JP2007124839A |
To provide an abnormality detector and a motor controller therewith, capable of improving the reliability in detecting abnormalities and minimizing damages to a motor.This abnormality detector for detecting some abnormality of a DC motor...
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JP2007121216A |
To provide a rotation state detector capable of restraining an influence of a high-frequency noise to detect accurately a rotational condition of a direct current motor, in particular, a rotation speed thereof.This rotation state detecto...
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JP3915964B2 |
To provide an electric power steering device capable of ensuring data of fluctuating resistance value R properly to perform estimate computation of the number of revolutions ω accurately based on the data and realizing current limit con...
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JP3911155B2 |
To always properly detect a speed and a revolution of a DC motor having a rotation detecting brush and to effectively control the rotation of the motor even if the driving voltage of the motor fluctuates and a voltage between the termina...
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JP3912540B2 |
To provide a linear motor driving device that satisfies the requirements of large thrust force at the time of acceleration and deceleration and small thrust force/low speed ripples/low thrust force ripples at constant speed times. This l...
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JP3912346B2 |
To provide a linear motor driving device that is characterized by minimizing the effect of speed ripples/thrust ripples to a system. This linear motor driving device is constituted of a linear motor and a driver that supplies a driving c...
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JP3912347B2 |
To provide a linear motor drive unit characterized in that influences to speed ripples and a thrust ripple are suppressed to the utmost. The linear motor drive unit is constituted of a linear motor having two kinds of windings for a larg...
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JP3912190B2 |
To provide a driving device for brushless motor wherein a power consumption is reduced when a motor is started and high rotational accuracy is attained by PWM frequency driving during steady-state rotation, and also to provide a motor us...
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JP3913913B2 |
To provide an actuator controller which can surely control the thrust of an actuator, not only at increase but also at reduction. An actuator 3, which receives the rotation of the motor body 31 with a transmission part 32 for speed reduc...
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JP3912770B2 |
To solve the problem of a conventional DC fan motor driver, wherein abnormality of a DC fan motor being incapable of being detected in the case of pulse driving the DC fan motor. This DC fan motor driver is equipped with a fan rotation c...
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JP3912735B2 |
To accurately detect on and off of a contact of a contactor at a high speed. A controller for a motor comprises a contactor on deciding unit for deciding that the contact of the contactor is turned on when a state in which the amplitude ...
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JP2007110849A |
To prevent damage/wear to a brake contact in a motor drive device for a power tool and optionally and easily adjust a braking force of a brake.In this motor driving device for the power tool having a power supply circuit (15) which recti...
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JP3910264B2 |
To provide a means capable of practicing a torque memory system which can cope with a tension variation of a rolled material at a high cycle, and be considered against the changes of deformation resistance based on the change of the temp...
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JP3909796B2 |
To provide a servo control unit, performing accurate control operation by correcting irregularities of a dynamic range in AD/DA conversion which generates error in an offset of a current detector and a forget indication value set by digi...
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JP3910587B2 |
A method of regulating an electric motor, regulation being implemented with a loop of gain less than unity as a function of a divergence between a setpoint signal for an operating parameter of the motor and a measured value of the same o...
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JP2007100564A |
To provide a control device of a variable valve train for improving a control responsiveness by generating proper braking torque by preventing flow of an excessive electric current when starting speed reduction or reversal control of a m...
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JP3905441B2 |
To provide a control method which enables detection of the replacement of a motor, if it replaces another, and obtaining the inherent characteristics of the replacing motor following the replacement, thereby enabling smooth operation of ...
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JP3906329B2 |
To provide a method for driving an electromagnetic actuator which can be speedily operated with the voltage of a DC voltage source or higher without requiring a step-up circuit and a bypass circuit. A power source voltage Vcc is connecte...
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JP3905997B2 |
To provide a motor-driven power steering system capable of excluding the effect of an undefined signal output from a torque sensor, and improving the steering feeling. A limitter circuit 12 is operated to limit an upper limit value of a ...
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JP3907195B2 |
To provide an improved anti-pinching device for a power window, which detects pinching of foreign matter by window glass from a change in motor current, and which limits the motor current by surely detecting an abnormal current, occurrin...
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JP2007089371A |
To provide a back converter capable of realizing a protection circuit with a low-cost configuration to prevent breakage of a switching element used for the back converter.A microcomputer 14 detects a voltage VC1 of a capacitor C1. It tur...
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JP2007508494A |
The compressor (K) is driven by an electric motor (M) and connected to a pressurised vessel (T) whose pressure can vary between upper and lower limits. Halving the motor torque results in the rotary speed of the motor being increased by ...
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JP3902435B2 |
To perform accurate feedback-control of current of a linear solenoid to a target current, which adjusts hydraulic pressure in an automatic transmission. A voltage difference between terminals of a current detecting resister interposed in...
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JP3902195B2 |
To provide a method and a system for controlling the motor torque of a motor while preventing the torque from increasing beyond a guaranteed containment level of the centrifuge so as to prevent failures of the centrifuge rotor. The metho...
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JP3900401B2 |
To provide a DC motor control method a control unit for preventing foreign sounds which are caused by cogging torque of a DC motor and backlash of a gear and generated in an engaging portion of the gear, when the DC motor is started. In ...
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JP3899926B2 |
To provide an electric load driver that appropriately reduces power loss and heat generation due to an arc-extinguishing current when conduction to electric load is turned off. The electric load driver has an H bridge circuit consisting ...
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JP3897235B2 |
To reduce power loss associated with current application to a motor, though it is so constituted as to suppress parts cost, and to surely protect a motor control circuit from an excessive current caused by the reverse connection. A motor...
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JP2007074794A |
To provide an overcurrent protective circuit which can protect an object of protection (internal element and the like of a load or a device) as an occasion demands and sufficiently.In this overcurrent protective circuit 23, a timer circu...
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JP3895159B2 |
To provide an electric power steering device capable of restricting overheating at a drive circuit (a power transistor, especially) in an electric motor to protect the circuit. When a microcomputer 10 determines that the motor drive circ...
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JP2007074814A |
To provide a motor drive current detection circuit capable of attaining significantly low cost by reducing the number of parts for a configuration without the need of high-precision parts.This motor drive current detection circuit is com...
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JP2007068391A |
To provide a system and a method for reducing fan noise by controlling a drive current to a fan motor.In one embodiment, the system approximates a linear drive while using a number of transistors in parallel and sequentially activating t...
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JP3891998B2 |
To provide a number-of-rotation detecting method of a motor which can detect higher than those before, on the basis of the input current waveform to the motor. The number-of-rotation detecting method of the motor includes the following s...
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JP3892207B2 |
To provide an actuator controller for a sun shade which can save the power within itself. This is an actuator controller 1 for a sun shade which is equipped with a switch circuit 11 which forms a current path for a current which flows to...
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JP3893795B2 |
To control drop in drive efficiency for variation of load by providing a control circuit which generates, with a self-oscillating operation, an application voltage for which an reverse electromotive force generated in electro-magnet coil...
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JP3892348B2 |
To provide a motor driving circuit which enables the elimination of the influence of bounce occurring in comparison output of a voltage comparator 9 without needing many circuit parts. This motor driving circuit is equipped with window o...
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JP3891157B2 |
To achieve a miniaturization and cost reduction of a switching device for a drive control circuit without sacrificing a drive responsiveness when starting or braking a DC motor. When starting the DC motor, an energization is carried out ...
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JP2007060750A |
To provide a motor controller which can reduce noise or vibration occurring from a motor and can be manufactured more easily than conventional.This motor controller is equipped with a series motor 9 which is equipped with two terminals 1...
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JP2007060835A |
To provide a fan motor driver/controller capable of eliminating an abnormal sound due to an excessive increase in a rotation speed and a risk of a partial ignition due to an excessive decrease in the rotation speed, excellent in the stab...
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