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Patent Searching and Data


Matches 701 - 750 out of 32,369

Document Document Title
WO/2015/103626A1
A pumping system for use in hydraulic fracturing or fracing of wells. The pumping system is generally self-contained on a transportable system, such as a trailer. The weight and configuration of the trailer mast be sized to be hauled leg...  
WO/2015/097734A1
This power conversion device identifies pull-out from the phase of a command voltage and the phase of a current produced as a result thereof and as such is not affected by either an induced voltage that becomes smaller at low speeds or c...  
WO/2015/098537A1
The present invention relates to an electric motor drive device, and a control method thereof, which supplies one electric motor with power from both a first inverter and a second inverter. A control unit that controls the output of the ...  
WO/2015/097733A1
When acquiring an induced-voltage coefficient for a motor with unknown motor constants, there is the problem that if not enough information regarding said motor is available and it is difficult to estimate approximations for said induced...  
WO/2015/098942A1
The present invention addresses the problem of providing a motor driving device equipped with a compact and low-cost overvoltage protection means that protects the device from momentary overvoltages. In this motor driving device (10), wh...  
WO/2015/097533A1
A motor control system includes a motor, at least one current sensor, and a controller. At least one current sensor is configured to detect a current supplied to the motor and output the detected current as a current signal. The controll...  
WO/2015/096224A1
A motor controller integrated with drive, charging and discharging functions, comprising: a bidirectional DC-DC converter, a three-phase bridge DC-AC bidirectional converter, a drive-charging mode switching device, an AC power supply inp...  
WO/2015/090756A1
The present invention provides a device and a method for changing over an electric machine from the regular operating mode into the open-circuit mode. In order to avoid excessive increases in voltage and associated adverse effects on the...  
WO/2015/093230A1
 The purpose of the present invention is to determine the frequency of AC power, without providing a separate frequency detection section. An air conditioning control device (26) is provided with a voltage detection unit (24) for detec...  
WO/2015/092759A3
An electric motor, comprises a stator (2) provided with stator windings (4), a rotor (3) provided with rotor windings (5) and electronic means for electronic switching (7). Advantageously said rotor windings define inductive elements for...  
WO/2015/093850A1
A pre-charging system for a capacitor in a voltage inverter for an electric motor is provided. The system includes a microprocessor that generates a first control signal, and a pre-charging circuit coupled to the microprocessor. The pre-...  
WO/2015/087437A1
When increasing or decreasing the speed of an AC motor driven by a power conversion device, in order to find the optimal length of time over which to decrease the speed of said motor, an operator ends up performing speed-increasing and s...  
WO/2015/086416A1
The invention relates to a cycloconverter (4) having a number of first converter groups (6), which in turn each have a number of line-commutated first power converters (7). The first power converters (7) are designed at least as bipolar ...  
WO/2015/082459A1
The invention relates to an electric motor (1), in particular a fan motor, comprising a device (5) for generating a sequence (3) of signals that comprises a plurality of especially blocks (22) of signals. The blocks (22) of signals compr...  
WO/2015/083449A1
The control device of an electric motor has: a function for generating, based on an electric motor constant and a torque command value corresponding to a predetermined temperature, a current command value to the electric motor and execut...  
WO/2015/084038A1
A pre-charging system for a capacitor in a voltage inverter for an electric motor is provided. The system includes a grounding contactor electrically coupled between a grounding terminal of a battery pack and a first end of the capacitor...  
WO/2015/078083A1
An electric drive system for a heading machine and a heading machine having same. The electric drive system for the heading machine comprises: a main power supply (1) and a switch (2), as well as a converter (3), a variable-frequency cut...  
WO/2015/073446A1
A method for field weakening control of a three phase permanent magnet AC motor in a Variable Frequency drive. The VFD drive calculates the three phase voltages to be supplied to the AC motor via a three phase inverter using feedback and...  
WO/2015/072173A1
Using a predetermined coordinate transformation determinant, a first command value used for obtaining a balanced three-phase AC signal is transformed to a second command value used for obtaining a two-phase AC signal, said balanced three...  
WO/2015/068240A1
The present invention obtains a protection device for a vehicle inverter that is capable of protecting an inverter element from overheating and preventing deterioration of drivability. A protection device for a vehicle inverter is provid...  
WO/2015/068300A1
A power conversion device is provided with: an AC rotary machine comprising a plurality of polyphase windings; a plurality of power conversion means that perform power conversion of DC voltage from a DC power supply on the basis of a plu...  
WO/2015/068258A1
The present invention is provided with: a current detection unit for detecting a current in a first coil line and a current in a second coil line; a reference voltage calculation unit for calculating a reference voltage on the basis of a...  
WO/2015/062708A3
The invention relates to a drive system comprising an inverter and a motor powered from the inverter by supply lines, wherein an electromagnetically actuated brake is mounted at the motor and wherein said brake can be supplied and theref...  
WO/2015/063865A1
A motor control device (2a) has a DC voltage unit (24a) for receiving DC voltage, a regenerative circuit (26a) provided in the DC voltage unit (24a), an inverter (21a) for converting the DC voltage of the DC voltage unit (24a) into AC vo...  
WO/2015/059784A1
The objective of the present invention is to obtain a motor control device and a motor control method with which vibration generated in a vehicle can be suppressed without increasing loss. A second upper/lower limit clipping unit uses an...  
WO/2015/059769A1
In order to obtain a motor control device that is capable of suppressing an abnormal operation of a synchronous motor, even of a synchronous motor with no saliency, by detecting a disk misalignment problem immediately after the motor sta...  
WO/2015/056541A1
The present invention relates to a drive device for performing vector control on the basis of output current from an inverter. This drive device is provided with a vector control unit (11) that converts three-phase output current from an...  
WO/2015/056839A1
The present invention relates to a smart inverter for a loom and comprises: a central control unit for receiving weft supply state information and system state information of the loom; a weaving database for storing weaving information; ...  
WO/2015/050068A1
The present invention suppresses an overvoltage even in the incidence of an overvoltage when a vehicle is in a non-operating state. This power conversion device (150) is connected to a three-phase motor that is mounted in a vehicle, said...  
WO/2015/049746A1
To obtain an AC motor drive system (1) capable of generating a charging current command value that is for a power storage device, corresponds to regenerative power intensity, and responds to abrupt regenerative power generation, if the r...  
WO/2015/045529A1
Provided is a power conversion device that can be restarted by estimating the rotor position and frequency during idling when current does not flow when a coil is short-circuited during idling of an AC electric motor and also when a rota...  
WO/2015/045714A1
In the present invention a converter (3) performs full-wave rectification on a single-phase voltage (Vin) and outputs rectified voltage (Vrec) between direct-current power supply lines (LL, LH). An inverter (5) receives the rectified vol...  
WO/2015/045138A1
This power conversion device is provided with: a converter unit which comprises a rectifier for rectifying the AC voltage supplied from an AC source, a reactor, a switching element and a backflow prevention element, and which boosts the ...  
WO/2015/046286A1
The present invention addresses the problem of periodic disturbances occurring in current, etc., due to offset error and gain error of a current sensor which is used in a control device. In the present invention, a voltage command value ...  
WO/2015/045530A1
There are cases in which a current is determined to have increased rapidly despite the fact that said current is not increasing. This power conversion device is provided with the following: a power conversion unit that converts power to ...  
WO/2015/045497A1
 Provided is an electrical power converter that can realize stable driving of an electric motor even if the specification value of the electrical power converter, the specification value of the electric motor, or the electric motor con...  
WO/2015/045425A1
The purpose of the present invention is to reduce harmonics caused by the rotation of a motor and included in power supply current. A power conversion device has: a compensation current generation unit (52) for controlling compensation c...  
WO/2015/040794A1
 A motor drive device provided with: an inverter circuit (40) having switching elements corresponding to each phase of a three-phase motor coil (16), the inverter circuit (40) converting a DC application voltage of a power supply (20) ...  
WO/2015/036835A3
An electric motor control apparatus (15) controls an electric motor system that includes a power converter (13) including switching elements (Qup) and a three-phase alternating-current motor (14). The electric motor control apparatus (15...  
WO/2015/036826A1
Provided is a motor controller that controls a motor system including: a power converter (13), a smoothing capacitor (12), a three-phase AC motor (14), and a current sensor (14v, 14w). The motor controller is provided with an electronic ...  
WO/2015/037645A1
Provided is a seawater desalination system using a reverse osmosis separation device, wherein in order to make it possible to control, according to the characteristics of a reverse osmosis membrane, the pressure change rate or flow rate ...  
WO/2015/036835A2
An electric motor control apparatus (15) controls an electric motor system that includes a power converter (13) including switching elements (Qup) and a three-phase alternating-current motor (14). The electric motor control apparatus (15...  
WO/2015/036479A1
The present invention relates to a control system for an electric charge, said system comprising: - A first power converter (VV1) and a second power converter (VV2) connected in parallel, - A first control unit (UC1) associated with the ...  
WO/2015/033885A1
This invention provides an electric brake device that makes it possible to improve responsiveness and minimize increases in power consumption. Said electric brake device is provided with a brake disc, brake pads, an electric motor (2), a...  
WO/2015/030883A3
An electrical DC generation system is disclosed. According to one aspect, a system for electrical DC generation includes an electrical machine having multiple stator windings and multiple rectifiers for connection to portions of the stat...  
WO/2015/028242A3
An electrical system (10) comprises an electrical converter (12) for interconnecting an An electrical system (10) comprises an electrical converter (12) for interconnecting an electrical source (e.g. a grid) (14) with at least one rotati...  
WO/2015/029480A1
The present invention relates to an overcurrent detection device and an overcurrent detection method which detect overcurrent upstream with respect to an inverter circuit in a drive control device for an electric motor. The present inven...  
WO/2015/025886A1
Provided is a construction machine capable of obtaining a large fuel reduction effect by ensuring good operability and efficiently using recovered energy. A construction machine provided with a variable displacement hydraulic pump which ...  
WO/2015/025356A1
A motor drive system comprises a motor, a motor control device, and a sensor for detecting the torque or acceleration of the motor. The motor control device includes: an estimation unit for estimating at least one of the speed and positi...  
WO/2015/025222A3
A tactile feel control device is disclosed. The tactile feel control device can include an electric motor configured to be mechanically coupled to a manual control interface that is movable by a user. The tactile feel control device can ...  

Matches 701 - 750 out of 32,369