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WO/2007/143217 |
A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at...
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WO/2007/143217 |
A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at...
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WO/2007/139800 |
A matrix converter includes a plurality of switches that electrically connect a multi-phase input voltage source to a multi-phase load; and a controller to output pulse-width modulated (PWM) switching signals to control the switches to p...
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WO/2007/139800 |
A matrix converter includes a plurality of switches that electrically connect a multi-phase input voltage source to a multi-phase load; and a controller to output pulse-width modulated (PWM) switching signals to control the switches to p...
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WO/2007/135968 |
The main circuit structure including a transformer and an LC filter is simplified. An LC filter is connected in series to each secondary wiring of a multiple-wiring transformer (TF). In an AC direct converting circuit, the stages of the ...
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WO/2007/133289 |
In a chiller system, an electronic control transformer is powered by the DC link of a variable speed drive that drives a compressor motor. The electronic control transformer converts the DC voltage to a constant 120 VAC at 60 Hz, for pro...
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WO/2007/133252 |
In a method of preparing and using an aperture mask, a temperature of an aperture mask is increased to a first, mounting temperature (T1), whereupon the size of the aperture mask increases according to its coefficient of thermal expansio...
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WO/2007/133289 |
In a chiller system, an electronic control transformer is powered by the DC link of a variable speed drive that drives a compressor motor. The electronic control transformer converts the DC voltage to a constant 120 VAC at 60 Hz, for pro...
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WO/2007/129755 |
The switching number of a bidirectional switch at an inter-sector transfer time is reduced to create a switching pattern having a lowered common mode voltage. With reference to an intermediate voltage phase of an input phase voltage of a...
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WO/2007/129756 |
An output voltage error and a fluctuation drop of a pulse voltage are reduced to reduce higher harmonics and a common mode voltage and to improve the minimum on-pulse width in a low voltage region. The phase and magnitude of an input cur...
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WO/2007/125828 |
An output voltage command signal for outputting a predetermined three-phase AC output voltage is generated by a line-to-line voltage control command signal generating unit (11), and a signal indicating a current flow ratio is generated b...
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WO/2007/123458 |
A method of controlling a current of a three-phase electric motor by means of a three-phase controller comprises adjusting the firing angles so as to leave a range of firing angles in which the DC components appear.
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WO/2007/113312 |
The invention relates to a device for supplying a plurality of loads from an electrical power feed network. The invention finds particular utility in the aeronautical field. The device comprises several converters (EPPi) each comprising ...
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WO/2007/108427 |
An output voltage (Vc) of a matrix converter (20) is generated by controlling switch operation of switch elements (21a-21d) arranged in the matrix converter (20). The phase and the amplitude of a voltage (Vo) on a load side are permitted...
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WO/2007/100265 |
An ICPT system has a single phase power supply which energises a conductive path (13) and has an inverter (5) to provide an alternating current at an operating frequency greater than the single phase utility supply frequency in the condu...
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WO/2007/094161 |
A matrix converter apparatus has a passive filter comprising input capacitors that are connected in parallel to junctions between a matrix converter main circuit and input three-phase AC reactors disposed on a three-phase AC power supply...
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WO/2007/094162 |
Connection between terminals of a three-phase electric component in a matrix converter is simplified and inductance between conductors is reduced. Linearly arranged terminals (11) of an Ac capacitor (10) and input terminals (21) of an IG...
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WO/2007/090258 |
The power tool comprises a servomotor, a torque converter and a control assembly that includes a power supply for converting AC to low voltage DC, a drive controller for firstly converting the AC from one phase to three and, secondly, fo...
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WO/2007/086647 |
Disclosed are an air conditioner and a control method thereof, which improve a power factor of the air conditioner by reducing a phase difference between a votlage and an electric current of a power source inputted to a compressor; and a...
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WO/2007/086241 |
In a power supply device (100) for supplying power to a plurality of CCFLs (210), a plurality of transformers (10a to 10d) are provided to the respective CCFLs (210). The primary coils (12a to 12d) of the respective transformers (10a to ...
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WO/2007/077043 |
The present invention concerns a power backup processor unit (200) comprising a first AC input line (313) provided to be connected to an AC power supply; first and second AC output lines (315, 316) provided to be connected to a critical ...
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WO/2007/077433 |
A switching regulator (100) for regulating an ac signal, and method of supplying power thereto are provided. The regulator includes a positive half cycle part and a negative half - cycle part arranged to regulate the respective parts of ...
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WO/2007/077433 |
A switching regulator (100) for regulating an ac signal, and method of supplying power thereto are provided. The regulator includes a positive half cycle part and a negative half - cycle part arranged to regulate the respective parts of ...
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WO/2007/077372 |
The invention relates to a method for driving a power bridge (1) which is used for controlling a multiphase electric load (3), is connectable to said electric load (3) through several arms and is drivable by switching functions determini...
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WO/2007/077426 |
A switching regulator and method of regulating an ac input signal to provide an ac output signal, receiving the ac input signal, generating a reference signal, detecting the points when the ac input signal is zero and synchronising the r...
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WO/2007/078259 |
There is provided a power supply for an electrical device operable in active mode and in standby mode. The power supply comprises a transformer having a primary winding on the primary side and a secondary winding on the secondary side. T...
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WO/2007/079491 |
Energy harvesting circuits and associated methods are provided that employ multiple antennas to optimize the amount of energy that is harvested while at the same time making efficient use of tag space. In some embodiments, matching netwo...
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WO/2007/077426 |
A switching regulator and method of regulating an ac input signal to provide an ac output signal, receiving the ac input signal, generating a reference signal, detecting the points when the ac input signal is zero and synchronising the r...
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WO/2007/079490 |
A method of powering a wireless autonomous device having energy harvesting circuitry, on-board electronic circuitry, and RF transmitter circuitry using an RF transmitting profile that includes a plurality of RF pulses. That same profile ...
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WO/2007/077372 |
The invention relates to a method for driving a power bridge (1) which is used for controlling a multiphase electric load (3), is connectable to said electric load (3) through several arms and is drivable by switching functions determini...
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WO/2007/074267 |
The invention relates to a method for driving a power bridge (1) which is used for controlling a multi-phase electric load (3), connectable to said electric load (3) via several arms and drivable by switching functions which determine fr...
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WO/2007/074710 |
It is possible to provide a power conversion device and a power conversion system capable of reducing the number of switching elements in 3-phase/2-phase conversion so as to suppress cost increase and lowering of conversion efficiency an...
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WO/2007/074267 |
The invention relates to a method for driving a power bridge (1) which is used for controlling a multi-phase electric load (3), connectable to said electric load (3) via several arms and drivable by switching functions which determine fr...
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WO/2007/075709 |
Disclosed herein is an automotive electrical system including a FET based rectifier and method of controlling the FET based rectifier without using either an alternator shaft position sensor or current sensors on each phase of the altern...
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WO/2007/069239 |
A method, system and apparatus for controlling a pulse width modulator (PMW) converter for direct AC/AC conversion and/or AC voltage regulation. According to some embodiments of the invention, an output voltage may be provided, independe...
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WO/2007/068532 |
The invention relates to a modular converter system (2). According to the invention, the modular converter system (2) has a basic converter device (4) and at least one additional converter device (6), wherein said devices (4, 6) can be p...
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WO/2007/068040 |
Disclosed is a universal dimmer which detects the type of load it is connected to each time the universal dimmer is activated. Information relating to the type of load connected to the universal dimmer is therefore not required to be sto...
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WO/2007/060083 |
A double universal dimmer for controlling electronic devices has at least two universal dimmers in a shared socket and a control device for identifying the type of load and for controlling faults. In order to increase the safety function...
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WO/2007/060083 |
A double universal dimmer for controlling electronic devices has at least two universal dimmers in a shared socket and a control device for identifying the type of load and for controlling faults. In order to increase the safety function...
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WO/2007/056140 |
A current transformer detects a sine-wave alternating current having a maximum effective current value Imax(Arms) and a frequency f(Hz) and a half-sine-wave rectified current having a maximum peak value IPeak(Aop) and a frequency f(Hz) i...
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WO/2007/054729 |
The present invention provides_a power converter that can be used to interface a generator (4) that provides variable voltage at variable frequency to a supply network operating at nominally fixed voltage and nominally fixed frequency an...
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WO/2007/042598 |
The object of the invention is an improved method for regulating the alternating voltage power to be supplied to the load (K) by regulating the phase angle of the alternating voltage (VAC). The method is applied to the power regulator (1...
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WO/2007/040443 |
The invention relates to a method for power control of an electric motor, in particular a motor for driving the suction fan of a vacuum cleaner connected to an AC mains power supply. The power control is effected by varying the phase ang...
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WO/2007/037105 |
An AC command voltage obtained by compensating a reference value of a commercial AC voltage output from a multiplication unit (140) using an FB control unit (142) is multiplied by k (0 ≤ k ≤ 1) by a multiplication unit (144) and outp...
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WO/2007/035216 |
A resonant power supply (300) is provided for ozone generation. The power supply (300) advantageously reduces costs and increases reliability of ozone generators. The power supply (300) provides a first AC voltage from a power source (32...
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WO/2007/033376 |
A music production system is presented that includes a music module to access computer software applications and produce music compositions. The system in a first mode records and corrects the pitch of a tune, typically a tune sung by a ...
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WO/2007/028350 |
The invention relates to a device for electron energy transfer (1, 39) which comprises at least one current converter (4, 6, 40). Every current converter (4, 6, 40) has phase elements (10, 11, 12, 13, 14, 15, 27, 28, 29) with at least on...
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WO/2007/028349 |
The invention relates to a device for electron energy transfer (1, 39) which comprises at least one current converter (4, 6, 40). Every current converter (4, 6, 40) has phase elements (10, 11, 12, 13, 14, 15, 27, 28, 29) with respective ...
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WO/2007/030833 |
A power delivery system, and a method for operating it includes a plurality of power cells that are electrically connected to a multi-winding machine comprising one or more primary windings and a plurality of secondary windings such that...
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WO/2007/030833 |
A power delivery system, and a method for operating it includes a plurality of power cells that are electrically connected to a multi-winding machine comprising one or more primary windings and a plurality of secondary windings such that...
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