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WO/2004/042884A1 |
The invention relates to a method for operating an electrical machine (1) by means of a control system. The installation dimension of the electrical machine (1) and/or the control system is monitored, the authorisation of an effective to...
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WO/2004/034563A1 |
A motor control device includes: a peak voltage control section (18) for detecting a peak voltage of a voltage instruction and outputting an adjustment instruction instructing an amplitude adjustment section (15) to suppress the amplitud...
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WO/2004/025818A1 |
The invention relates to an electronic control device for an asynchronous, single-phase or three-phase motor, comprising an electronic board (2) and a relay (3) for controlling the power supply to the motor. The aforementioned electronic...
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WO/2004/021556A1 |
A controller for synchronous motors, not needing any signal generator and enabling determination of the position of a magnetic pole of the motor rotating at a rotational speed ranging from zero. A controller for controlling the torque an...
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WO/2004/021557A1 |
Novel vector control method and a controller involving a drive control method and controller for a permanent magnet synchronous motor in which problems caused by a position detector, e.g. an encoder, fixed to a rotor are solved by elimin...
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WO/2004/017506A1 |
A control device (30) receives an output voltage (Vm) of a boosting convert (12) from a voltage sensor (13) and calculates a feedback preparatory voltage instruction decided by a difference between a voltage instruction and the output vo...
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WO/2004/012238A2 |
A power inverter control adjusts input power to track with output power to reduce energy handling requirements for an inverter DC bus. Input power to the power inverter circuit is measured and compared with a measurement of inverter outp...
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WO/2004/012327A1 |
A method and an apparatus are described for monitoring a rotating synchronous electric machine (9), which comprises a rotor having a rotor winding and a stator having a stator winding. The method comprises the steps of determining the st...
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WO/2004/008628A1 |
A vector control invertor has a device for sensing the speed of motor rotation from a rotation speed sensor mounted on a motor, a current sensor for sensing a primary current of the motor driven by an invertor circuit, a vector controlle...
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WO/2004/008624A1 |
A method for adjusting gain of a servo control device suppressing irregularities depending on the position on a machine. In the method for adjusting gain of the servo control device having speed control for inputting a deviation between ...
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WO/2004/006421A1 |
A drive circuit for an electric motor, comprising a switchable DC/AC frequency converter, control means for controlling said frequency converter to deliver a pulse width-modulated excitation signal to the motor, setting means for providi...
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WO/2004/001953A1 |
A control system for a multiphase permanent magnet motor compensates for physical variations among individual motor phase circuit elements. The control system successively develops a control voltage for switched energization of the motor...
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WO/2004/000089A1 |
A portable leaf blower (10) that includes a housing (12) having an inlet (14) and an outlet (16) and an impeller (28) adapted to generate an airflow from the inlet to the outlet. An electric motor (22) rotatably drives the impeller. The ...
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WO/2004/001952A1 |
Individual current control units are provided to respective motor winding systems of a multi-winding motor that constitutes a hoisting machine (6) for lifting/lowering a cage (8) to give the same torque instruction, and Ѳa and Ѳb obtai...
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WO/2003/100959A2 |
A system and method for controlling a rotating electromagnetic machine. A drive is connected to the machine's phase windings for energizing the windings. An estimator is connectable to the machine for receiving signals representing the p...
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WO/2003/096523A1 |
An electronic controller using digital technology performs various functions in controlling the energy consumption of low power single-phase AC motors and providing protection and power conditioning to household appliances. It reduces en...
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WO/2003/084050A1 |
A sensorless controller of an AC motor which is controlled stable over the whole drive range including zero speed and zero output frequency regions. This sensorless controller comprises a high-frequency generator (110) for superposing a ...
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WO/2003/084044A2 |
A technique for reconstructing phase currents based on measurements of a DC bus current. Non-observable regions of DC bus current samples to reconstruct phase currents are reduced in size by using two phase space vector modulation. The n...
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WO/2003/081765A1 |
A synchronous reluctance motor control device includes current correction/calculation means (16) for generating a torque current instruction value following the load torque so that the output torque of the synchronous reluctance motor is...
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WO/2003/081763A1 |
An adaptive closed-loop controller is described that reduces repetitive speed variations of precision rotatable mechanical components, such as rollers, casting wheels, pulleys, gears, pull rollers, extruders, gear pumps, and the like. A ...
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WO/2003/079533A1 |
A control constant adjusting apparatus for use in a control device of a robot, a machining apparatus, and the like. The control constant adjusting apparatus includes a speed control unit (12), an estimation unit (13), an identification u...
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WO/2003/079535A1 |
A motor current square calculating section (45) calculates, as the motor current square, the sum of the squares of the two-phase currents into which the three-phase currents flowing through an electric motor are converted. A temperature ...
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WO/2003/079534A1 |
A method for controlling an AC motor exhibiting salient pole characteristic to a high frequency power and the AC motor. In order to solve various problems including reliability, volume increase, wiring problem, and cost attributed to a p...
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WO/2003/071672A1 |
A voltage sensing section (11a) and a current sensing section (11b) sense a voltage and a current to be supplied to a motor (5), and the sensed voltage and current values are supplied to a position sensing section (12). An angular veloci...
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WO/2003/050341A1 |
An inverter of washing machine performing drive control of a motor imparting a rotational driving force required for washing, rinsing and spin extracting operations in a full automatic washing machine performing the washing, rinsing and ...
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WO/2003/038987A1 |
The invention relates to a method for operating a control device for the purpose of speed control of an electric motor. Said control device comprises a frequency converter circuit, a power factor correction circuit, and a microprocessor ...
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WO/2003/032478A1 |
A first capacitor (2a) is connected between the output terminals of a rectification circuit (2) the input of which is an AC power source (1), and a three−phase inverter (3) in parallel with the first capacitor (2a), and the output of t...
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WO/2003/032482A1 |
A small and inexpensive apparatus for switching the windings of an AC three−phase motor in which the time required for switching the windings is shortened and the number of semiconductor switch elements is decreased as much as possible...
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WO/2003/030348A1 |
A phase current detection apparatus includes an output time detection unit for receiving a voltage vector instruction and detecting a voltage vector for which output time should be increased, an output time increase unit for receiving a ...
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WO/2003/021751A1 |
Reversible motor including a stator comprising two windings (a-a', b-b'), a start apparatus (c-c') connected to one of the two windings (a-a', b-b') in series, switches (310,330,350) for providing power to the two windings selectively, w...
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WO/2003/019765A1 |
This invention is an improved energy-saving method and apparatus for attaining and maintaining optimum operational efficiency in single-phase or three-phase alternating current (AC) induction motors that are operating under varying loads.
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WO/2003/019314A1 |
A synchronous electric motor sensorless control device for driving a synchronous electric motor without using any rotational position measuring device. The sensorless control device comprises a relative position counter (4) for resetting...
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WO/2003/015256A1 |
It is possible to provide a method capable of easily and reliably sense a magnetic pole position by using inverter output higher harmonic and high−frequency current such as a carrier frequency component. A voltage type PWM inverter cau...
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WO/2003/015254A1 |
On end of a reactor (L1) is connected to a positive electrode of a battery (B1) and the other end is connected to a power line via a transistor (Q1) and to the ground via a transistor (Q2). By PWM control of the transistors (Q1, Q2), an ...
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WO/2003/012974A1 |
A control system for a permanent magnet motor having low-resolution speed measurement is taught. The control system is comprised of a speed regulator, voltage regulator and current regulator. The speed regulator uses a speed command and ...
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WO/2003/009463A1 |
A speed control device for an AC electric motor comprising a current controller for dividing the current of an AC electric motor into an exciting current and a torque current or two components on rotating orthogonal two−axis coordinate...
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WO/2003/005547A2 |
The present invention relates generally to the reduction of odd harmonics of phase angle controlled loads. One embodiment relates to an apparatus for reducing odd harmonic currents introduced into an alternating current (AC) supply by a ...
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WO/2002/101915A1 |
An induction motor control motor system senses the zero-cross angle of a current waveform applied to the motor's phase windings and computes the differences between the sensed current zero-cross angle and a predetermined demand voltage a...
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WO/2002/097955A1 |
A motor driving device includes (a) a wide-angle feeding device (1) for feeding power to three-phase coils (11, 13, 15) in a width of 150 degrees in electrical angles and (b) a feeding amount controller (2) for controlling a feeding amou...
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WO/2002/091558A1 |
A system for controlling a synchronous motor, comprising a current sensor for measuring the electric current of a synchronous motor; a coordinate transformer for coordinate-transforming the electric current measured by the current sensor...
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WO/2002/087065A1 |
A motor controller has both a basic-frequency current component and a harmonic current component at the same time. A prior art does not allow the simultaneous cancellation of torque ripples generated in a motor because the harmonic curre...
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WO/2002/078167A1 |
A method for estimating the magnetic polar position of a synchronous motor for stably controlling it by reliably sensing the magnetic polar position of the synchronous motor even on a high load and with a sudden change in load, and a con...
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WO/2002/078168A1 |
A method of detecting a motor current, which detects the phase current of a motor driven via a power converter that converts a dc current into a polyphase ac current by on/off-controlling a plurality of bridge-connected switching element...
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WO/2002/065608A1 |
An overload current protection device for cutting off power feed from a power supply to a load (3) such as a motor by means of a contactor (switch) (2) at overloading, wherein an element (40) having a magnetic impedance effect as current...
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WO/2002/060048A1 |
A device for controlling the operation of a motor (8) included in an electromechanical motor drive comprises first means (5, 5') adapted to calculate a desired reference value of a parameter specific to the operation of the motor on the ...
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WO/2002/050993A1 |
A magnetic estimator (7) of a controller used for sensor-less vector control of an induction motor calculates a speed estimate $g(v)¿rest? and a phase estimate $g(u)¿lest? from inputted $g(a)- and $g(b)-phase voltage commands V¿$g(a)?...
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WO/2002/050992A1 |
A method of controlling a synchronous motor, which permits a low-cost constitution without using a position sensor, and can realize an excellent performance over a low- to high-speed-region range. A control operation unit (601) estimates...
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WO/2002/049201A1 |
An acceleration signal generating unit (11) receives the machine velocity (vm) of a driving machine and outputs a low-frequency acceleration signal (af). A pseudo-torque signal generating unit (12) receives a torque command (tr) and remo...
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WO/2002/047236A2 |
A constructive arrangement for the starting system of an electric motor, comprising a basic body (10), to which are mounted a cover (20), a starting device (30) and a motor protector (40, 40'), said basic body (10) being provided, on an ...
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WO/2002/041486A1 |
A device for controlling the torque generated by an induction motor with high accuracy comprises a rotation detector (2) for detecting the rotational speed of an induction motor ; a current detector (3) for detecting the primary current ...
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