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JP3965395B2 |
To provide a motor drive capable of performing stabilized PWM sensorless starting free from starting failure, e.g. oscillation, step-out, reverse rotation, while shortening the starting time. A conduction control section 40 regulates con...
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JP3966194B2 |
To perform protective operation with high reliability while sustaining the operating conditions of a motor when an undue motor current flows. A drive circuit 12 performing on/off control of an MOSFET 5 for driving a motor 1 with a pulse ...
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JP3965791B2 |
To provide the fan motor for a refrigerating equipment, for constituting an overall motor with a compact configuration of a DC motor which has low dissipation power. This fan motor for a refrigerating equipment comprises a rectifier 11 f...
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JP3968972B2 |
To improve control property and safety property of an electric power steering device by controlling the same with two CPUs or MCUs of main and sub. In a control device for an electric power steering device controlling a motor based on a ...
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JP2007524338A |
In a device for controlling an electric motor, especially in motor vehicles, for setting a setting element, moved by the electric motor, as a function of the deviation of an actual setting from a nominal setting of the setting element, b...
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JP2007215273A |
To suppress the generation of an excess voltage, and to effectively use electromotive power so as to attain energy saving. This information record reproduction device comprises: a spindle motor that rotatively drives a disk recorded with...
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JP2007215325A |
To provide a protector for protecting a motor drive against damage by a simple constitution when a spindle motor or a thread motor short-circuits. The protector 1 for an optical disc drive equipped with a control IC 101, a motor drive IC...
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JP3964375B2 |
To provide a drive device for power windows wherein the occurrence of erroneous stop is prevented immediately after a driving motor M1 is started and, if anything gets caught in a moving window, that can be detected without fail. While a...
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JP3964399B2 |
To simplify a circuit for suppressing radio signal noise (radio noise), generated accompanying switching in an electric motor driving device for making an FET switched as a switching element provided in the energizing route of the electr...
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JP2007209152A |
To provide a motor actuator device having a simple structure easy to be downsized and capable of stopping a motor at a desired angle. The motor actuator device energizes a motor by bringing a contact piece 71 of a brush 7 rotated by the ...
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JP2007522988A |
A motor control arrangement includes a device connected to positive power such that device drives motor upon connecting to negative power. A switch connects to positive power upon actuation. A first transistor connects to switch via cont...
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JP3957177B2 |
To provide a motor drive unit which can be used both for motor with brush and for three-phase brushless motor and enhances the rotating capability of a motor with brush. The motor drive unit is used for driving a motor provided with a mo...
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JP3957295B2 |
To realize a motor driving with high precision and high quality even if an encoder with high precision and high resolution is not used. A motor drive 100 drives a motor 101 using signals output from a rotation angle encoder 30 for detect...
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JP2007196505A |
To provide a printer which is simple and adequate in structure, and carries out high-resolution control. The printer comprises: a rotary encoder 36 having a rotary scale 34 for forming marks at predetermined intervals, and a detecting se...
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JP2007202259A |
To provide a motor control device wherein, when a motor is inoperative, a point of failure in a drive circuit can be located through a simple construction. A power window device 1 includes: a motor 20 that is operated by power supply fro...
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JP3954187B2 |
To provide a three-phase linear motor which is easy to manufacture at low-cost because a fewer number of coils are required, and which makes it possible to obtain driving performance equivalent to the case where three coils are used. Thi...
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JP3954409B2 |
To provide a current value detection device capable of always supplying correct detection values to a plurality of control devices through only a peak hold circuit. This current value detection device comprises an assist motor 8 for gene...
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JP3956762B2 |
To learn the state of a printing medium, such as the presence or absence of a loaded tape cassette, with relatively high accuracy and reduction in the number of revolutions of a DC motor suppressed. The voltage between the terminals T1 a...
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JP3956922B2 |
To stably drive a target independent of the fluctuation of a motor load, in performing motor control where the driving force of a motor is incremented by a specified amount at a constant cycle from a preset initial driving force each tim...
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JP3956037B2 |
To provide a control unit for electric power steering mechanisms that make it possible to reduce battery power consumption, minimize PS motor damage, and extend the life of the PS motor. A drive transistor 4, which is a self-extinguishab...
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JP3956896B2 |
To provide an electric motor driver in which heat generation from a wire connecting between a power supply terminal joint and a motor terminal joint can be suppressed. A switching transistor 32, relays 34 and 35, a capacitor 36, a shunt ...
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JP3954075B2 |
To provide a drive controller capable of controlling a field current reliably with a simple structure, when regenerative braking of a DC motor is started. When a switch 5 is opened, a current flows in a circuit starting from a DC power s...
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JP2007195288A |
To provide a motor driving circuit which can prevent malfunction at a very low cost. In the motor driving circuit 1 which has a bridge circuit 11 that drives a motor, switching its normal/reverse rotation, a right rotation high side driv...
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JP2007192777A |
To provide a current detecting device preferred for improving resolution in current detection. To convert an output signal of a current sensor 30 to a digital signal by an A/D converter 32 having N-bit in accuracy. The output signal of t...
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JP3950382B2 |
To provide a matrix converter applicable both to an alternating- current motor and to a direct-current motor. Two outputs of an ordinary matrix converter bridge 7 are supplied to an armature of a direct-current motor 55, and a third outp...
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JP3951932B2 |
To provide a load drive control system in which the standby current of a driver can be reduced furthermore. A power supply circuit is provided as a current source for delivering a control signal on the ECU 23 side and when the ECU 23 is ...
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JP3948300B2 |
To provide a control device for a motor driven power steering device capable of detecting the failure of a motor current detecting circuit by eliminating the adverse effect of the oxide film on the contact faces of the commutator and the...
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JP3949121B2 |
To provide an electronic apparatus for controlling rotational speed of a fan using an electric circuit composed of a simple circuit, with no increase in the number of components. The electronic apparatus comprises a fan motor M, a drivin...
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JP3945362B2 |
To provide a printing device which can suitably perform a proportional integral differential calculation for controlling a DC motor. The printing device, having a first motor (e.g., a carriage motor) and a second motor (e.g., a sheet fee...
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JP2007176080A |
To provide a printer capable of reducing the total sum of a printing time along with an increase in the amount of printing.This printer comprises a roller body 32, a DC motor 40, a controller part 60 and a printing part 50. The roller bo...
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JP2007174736A |
To provide a motor driving circuit for switching a drive period of a voltage boosting circuit in a motor control activating state and a motor control deactivating state, reducing a PWM period and a beat noise in the motor control activat...
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JP3939642B2 |
To provide a drive controller for an actuator which can prevent the occurrence of noise at start or stoppage of an electric motor. This drive controller for an actuator is equipped with a drive means which drives the actuator having the ...
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JP3941438B2 |
To suitably restrain decrease in throughput which is caused by a pause time being too long, when heat generation limit control for limiting heat generation is conducted by putting pause during intervals of driving a motor. When a carriag...
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JP3940388B2 |
To provide a reaction force processing system for a stage apparatus which obtains a stable and high positioning performance even if a movable part is located at any position. The reaction force processing system for suppressing a vibrati...
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JP3940719B2 |
To provide a control circuit 10 for a rotational speed of a fan by which the rotational speed of the fan under an arbitrary voltage can be changed, as required, in an arbitrary input voltage. A drive circuit 14 for outputting a pulse is ...
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JPWO2005055410A1 |
In the open-loop control type DC motor drive device, it is determined based on the speed command data whether or not the supplied speed command data corresponds to the drive instruction of the DC motor. When it is determined to be a driv...
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JP2007166889A |
To detect accumulation voltage of a low rise rate, while the temperature is compensated, to on/off control a switch mechanism with a signal for automatic and intermittent drive of a motor with functions, for making the conversion efficie...
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JP2007166892A |
To provide a deciding method of the rotational speed ω of a DC motor for precisely improving the rotational speed control of the DC motor and reducing rotational speed fluctuation.In the deciding method of the rotational speed of an ele...
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JP3938486B2 |
To obtain a controller of multiplex winding motor in which interference between the current control systems of respective windings can be compensated while constituting the current control system for each winding at the time of performin...
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JP3936631B2 |
To provide a method and a means, for electrically controlling a levitated traveling system for repeatedly and continuously performing a traveling motion by a group control pattern. A movable body 2 can be repeatedly and continuously trav...
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JP2007516440A |
The invention relates to a method and an array for determining the rotational speed of a direct current motor, wherein an analogue/digital converter (5) is coupled to the supply terminal of a motor (1). Two man value generators (61, 62),...
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JP3931830B2 |
To prevent the failure of control and adverse influence on a servo motor 2 in the case that pulses are kept in a raised ON state without falling in the final output state of the pulses 3 while the transmission of output pulses 3 is promp...
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JP3931787B2 |
To provide a linear actuator capable of performing control with a control parameter optimum to load mass. This linear actuator using a pneumatic bearing and a position sensor, having no slide friction, and allowing absolute positioning i...
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JP3934369B2 |
To provide a movable body driver-controller capable of controlling the traveling speed of a movable body with stability without being influenced by disturbance and further controlling the traveling speed of the movable body with accuracy...
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JP3932408B2 |
To provide a pre-drive circuit for a brushless DC one-phase motor in which a cost can be reduced and a mounting space can be decreased, and which can be easily mounted on a small-sized circuit board. The pre-drive circuit for the brushle...
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JP3931604B2 |
To obtain the optimal number of revolutions, torque and waveform of a sweep signal, and to control a switching means appropriately. The DC motor speed controller 1 comprises a DC motor 11, a power supply 12 for supplying DC power to the ...
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JP3931181B2 |
To provide an electric power steering device capable of reducing load of a battery 4 when an IG (ignition switch) 101 is turned off and efficiently driving a motor 7 when starting the motor. The electric power steering device is equipped...
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JP3928588B2 |
To control the rotational speed of a motor for driving a pump so that the operation noise of a motor is reduced during an initial short period of controlling rotational speed of the motor. The controller of a motor for driving a pump is ...
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JP2007143362A |
To provide a motor control circuit that can selectively conduct many gradual rotation drive operations of a motor with small number of output ports, by employing a circuit configuration that changes the control voltage into a step form b...
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JP2007137162A |
To use a two-stage speed change motor of three-brush structure as a power source of a power slide seat without complicating the structure.As the motor, the two-stage speed change motor 12 of three-brush structure having a pair of low-spe...
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