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WO/2008/096034A1 |
The invention discloses a method for controlling an electric drive that drives reels of a slit ter in the paper machine. In the method at least speed and acceleration/deceleration of a slitter is controlled. According to the invention a ...
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WO/2008/096523A1 |
An inverter control device includes a current-following PWM control circuit which directly generates a PWM signal in which currents id, iq follow current references id**, iq** according to the result of comparison of inverter output curr...
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WO/2008/072574A1 |
Provided is an AC motor control device capable of realizing stable operation not depending on the motor type or the load condition. The AC motor control device controls d-q axis current according to a speed instruction frequency so as to...
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WO/2008/070633A2 |
In one embodiment, the present invention describes a gate closure system 5 having a barrier or gate operator for moving a gate 15 between a gate fully opened position and a gate fully closed position. The gate closure system 5 preferably...
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WO/2008/065978A1 |
Provided is an induction motor control device which is robust even if the secondary resistance is fluctuated by a temperature fluctuation. The induction motor control device includes: an inverter circuit (1) for driving an induction moto...
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WO/2008/065719A1 |
[PROBLEMS] To propose a controller of an AC rotating machine in which a stabilized rotational angular frequency estimate value can be obtained even in the extremely low speed region of an AC rotating machine and stabilized control can be...
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WO/2008/061575A1 |
An electric motor (12, 12') has a sensor, in particular a Hall sensor (16), at which at least one terminal (88, 92) is provided. A programmable ASIC (22) is associated with the motor (12, 12'), which ASIC can be programmed by a programmi...
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WO/2008/053675A1 |
An electric motor car control apparatus has a speed sensorless vector control means (11) that estimates, from the output voltage command and output current of a VVVF inverter (6), a rotational speed of an AC electric motor (7) and contro...
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WO/2008/053554A1 |
An electric motor car control apparatus has a speed sensorless vector control means that estimates, from the output voltage command and output current of a VVVF inverter, a rotational speed of an AC electric motor and controls, based on ...
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WO/2008/052388A1 |
A control method of electromotor comprises the following steps: setting an alternating axis target current according to the rotor angle velocity of the motor and setting a direct axis target current according to the torque of the motor; ...
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WO/2008/047430A1 |
A power converter comprising a converter for converting AC power into DC power, a converter controller for controlling the output voltage of the converter, an inverter for converting the DC power into AC power of variable frequency, an i...
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WO/2008/041395A1 |
An algorithm for increasing a powering torque outputted when a target torque To is outputted in the same direction as the operating direction as the controlled variable X of an operating lever (2) increases and for decreasing the powerin...
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WO/2008/026270A1 |
Provided are an electric motor driving device which is constituted either to reduce the capacity of a condenser for smoothening a DC voltage after an AC power source was rectified or to eliminate the condenser, thereby to reduce the size...
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WO/2008/026249A1 |
An AC motor vector control apparatus includes a damping control part that provides an automatic calculation of optimum damping manipulation amount to eliminate the necessity of a gain setting itself, thereby simplifying the adjustment op...
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WO/2008/023779A2 |
The single-phase brushless motor according to one aspect of the present invention includes a coil array having a plurality of magnetic coils 11 -14; a magnet array having a plurality of permanent magnets 31 -34; a magnetic sensor 40 for ...
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WO/2008/023688A1 |
A motor driver performing improved control of driving an AC motor. On receiving a drive signal outputted from a microcomputer (1), a phototriac (7) supplies an AC current from an AC power supply (E1) to an AC motor (M1). Only when the va...
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WO/2008/020501A1 |
The detection signals of odd-numbered phases outputted by a phase current detecting sensor of a multiphase motor are sequentially digital converted to phase current data at intervals Δtp. A digital conversion midway in the order of thos...
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WO/2008/020500A1 |
When the rotational speed ω is in the predetermined speed range -ω1 ≤ ω ≤ +ω2 including the rotational speed 0 at which the target current id*, iq* assigned to a target torque T* are discontinuously changed, the target current id...
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WO/2008/014855A1 |
Drive comprising an electric motor (M) which is fed by a converter (SR), wherein the converter comprises a discrete-time control structure which controls the stator current of the electric motor by means of adjusting the voltage (U) appl...
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WO/2008/013000A1 |
An inverter comprises an LC filter having a diode bridge (21) for rectifying a received three-phase voltage to a DC voltage, an inverter section (22) for converting the DC voltage converted by the diode bridge (21) into an AC voltage for...
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WO/2008/004177A2 |
The invention is directed to a method for controlling a deceleration process of a DC motor (20), wherein the DC motor (20) is driven by a bridge driver (18) coupled to a power supply (12) intended to provide a supply voltage VDD at a pow...
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WO/2008/004294A1 |
An induction motor vector control device comprises secondary magnetic flux command computing means (40) for computing a secondary magnetic flux command (φ2*) from the torque command (Tm*), DC voltage (Efc), and the angular frequency (ω...
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WO/2008/004417A1 |
A rotating machine sensorless control apparatus comprising an inverter (05) that converts DC and AC powers to each other; a permanent magnet synchronous machine (07) the rotator of which has a magnetic saliency and which is driven by a p...
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WO/2008/004316A1 |
There are included a secondary magnetic flux command calculating means (40) that calculates, based on an externally given torque command, a DC voltage to be inputted to an inverter, and based on an inverter angular frequency that is the ...
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WO/2008/004419A1 |
A current instruction generation unit (102) generates a d-axis current instruction (Id*) and a q-axis current instruction (Iq*) according to an AC motor torque instruction (TR) by using a map in which a current instruction capable of red...
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WO/2008/001445A1 |
[PROBLEMS] To propose an AC rotating machine controller for suppressing a great variation of the amplitude of an AC phase current even a variation of the temperature of an AC rotating machine and capable of stable starting the AC rotatin...
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WO/2008/001615A1 |
There is provided an electric motor driving device operable with up to a high load while improving the efficiency of an inverter. The electric motor driving device comprises a voltage conversion circuit (2) for changing a DC voltage valu...
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WO/2007/144959A1 |
A power converter control circuit includes: voltage instruction means for generating a voltage instruction signal; power instruction compensation means for compensating the voltage instruction signal and generating a compensation voltage...
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WO/2007/141948A1 |
A rotor (11) has a main permanent magnet mounting layer (21) in which main permanent magnets (21a) are mounted, a first sub-permanent magnet mounting layer (22) in which first sub-permanent magnets (22a) are mounted, a second sub-permane...
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WO/2007/141084A1 |
The invention relates to a starting procedure for a DC motor which is operated in a polyphase form and has no sensors and brushes, in which the DC motor is accelerated to a switching rotation speed in an open operating mode without knowl...
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WO/2007/138644A1 |
There are included a VVVF inverter (1) that exchanges powers with an AC rotating machine; a voltage detector (16) that detects voltage information of the DC side of the inverter (1); a current detector (3) that detects current informatio...
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WO/2007/131667A1 |
The invention proposes a drive system for an electronic domestic appliance, for example a washing machine, a dryer or a dishwasher, said system having an electric motor and a motor controller for controlling operation of the electric mot...
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WO/2007/126024A1 |
Provided is a servo motor control device capable of improving current control loop response and preventing vibration of a servo motor. The servo motor control device includes: current detection means for detecting an output current value...
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WO/2007/125669A1 |
It is possible to prevent change of characteristic of a control system and stably drive a motor-driven device. A motor-driven control device includes current instruction value calculation processing means for calculating a current instru...
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WO/2007/119755A1 |
It is possible to provide a motor control device capable of suppressing fluctuations of voltage synthesis vector and improving output of a brushless motor and a motor-driven power steering device using the same. The control device calcul...
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WO/2007/115907A2 |
The invention relates to a drive and evaluation unit for displacing a displacement object, particularly for raising and lowering a side window in a motor vehicle, comprising a commutator motor, a stator and two diametrically opposed perm...
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WO/2007/114109A1 |
An AC motor driving apparatus which can utilize a conventional PWM system as it is, even for a microminiature motor having extremely small number of turns of an exciting coil without generating vibration or noise. An AC motor control met...
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WO/2007/113859A1 |
The present invention relates to a control device for an asynchronous electric motor comprising a microcontroller suitable for generating a pulse width modulation (PWM) control signal for controlling an electronic power circuit. The micr...
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WO/2007/104282A1 |
The invention relates to a device for the simultaneous simulation of the symmetrical and asymmetrical impedance of an asynchronous machine. The device has three sub-circuits for simulating the three phases of the asynchronous machine. Ea...
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WO/2007/102503A1 |
Provided is an earth-fault detecting method for detecting an earth fault having occurred in a motor, by using the existing inverter. When the earth fault occurs in a three-phase motor (10), the terminal voltage of a smoothing condenser (...
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WO/2007/097183A1 |
An electric motor control apparatus for performing a variable speed control of an electric motor, wherein the gain of a proportional-plus-derivative controller using a current feedback is adjusted on-line, based on an electric constant a...
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WO/2007/086200A1 |
A torque command (Tht) used in the calculation of a voltage command (Vht) of a voltage-up converter is generated by adding an upper limit value value (Tc_max) of damping control that can be set by a motor drive device with a target drive...
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WO/2007/072365A1 |
An adaptive system for a personal care appliance, such as a power toothbrush, having a workpiece which is driven through an amplitude of motion by a drive mechanism which includes a stator member includes a circuit (13) for measuring ave...
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WO/2007/066182A1 |
In the rectangular-wave voltage control mode, torque feedback control, in which the voltage phase (ϕv) of the rectangular-wave voltage is adjusted based on the deviation of the torque estimated value (Trq) from the torque command value ...
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WO/2007/063366A2 |
The invention relates to a processing unit of a measuring signal related to conditions of an object controlled by power electronics. The processing unit comprises an interface with digital terminals, wherein the interface is provided wit...
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WO/2007/049810A1 |
In a system for driving an AC motor in which motor current is feedback-controlled, normally, a motor current instruction is generated according to a torque instruction value on the optimal efficiency characteristic line (CL0) so as to se...
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WO/2007/047143A1 |
A system, method, and device for monitoring an AC induction motor are disclosed. The exemplary system provides the architecture of an intelligent motor controller. On one hand, the controller has self-commission and adaptive tuning capab...
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WO/2007/014725A1 |
The invention relates to a safety switching unit, with which a safety device, preferably an electric drive, can be controlled into a safe state. The safety switching unit (900) comprises a microprocessor or microcontroller (822) that, fo...
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WO/2007/014685A1 |
The invention relates to a method and device for operating an electric motor at a higher efficiency by adjusting at least one motor current and influencing at least one motor voltage, wherein the inventive method consists a) in determini...
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WO/2007/013291A1 |
There is provided an inverter device capable of detecting a miss-adjustment state of an AC motor by a simple process not depending on the rotation speed of the AC motor and surely holding an abnormal state. The inverter device (1) includ...
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