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WO/2021/086389A1 |
Permanent magnet motors (PMMs) can develop oscillations during motor startup that can cause damage to electric submersible pump (ESP) components. A system and method are presented for identifying mechanical and/or electrical caused oscil...
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WO/2021/084617A1 |
This electric motor drive device (2) has: a connection switching device (60) having switches (61-63) and switching the connection states of the windings (71-73) of an electric motor (7) by performing switching operation of the switches d...
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WO/2021/078758A1 |
The present invention relates to a method for driving electric motors using a pulse-width-modulated signal, wherein the pulse-width-modulated signal is a square-wave pulse consisting of successive impulses whose impulse duration is adjus...
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WO/2021/073061A1 |
A frequency converter controlling method and a frequency converter. The frequency converter controlling method comprises: measuring an electrical parameter of a bus of a frequency converter (S101); and if the electrical parameter of the ...
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WO/2021/069222A1 |
The invention relates to a drive system (2) comprising: - an inverter (6) comprising a first input (14), a second input (16) and N outputs (18); - a rotating machine (8) comprising a stator, the windings of which are connected at the out...
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WO/2021/071207A1 |
An apparatus capable of efficiently reducing leakage current and noise in various environments by shifting a pulse signal of an inverter configured to control a three-phase drive motor, and a control method of the same are provided. In a...
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WO/2021/069229A1 |
The invention relates to a drive system (10) comprising: - an inverter (6) comprising N arms, each arm comprising an upper half-arm and a lower half-arm which each comprise at least one switching module; - a rotating machine (8) connecte...
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WO/2021/068446A1 |
A brushless direct-current electric motor system control method based on a hybrid energy storage unit. The method comprises: constructing a hybrid energy storage unit, wherein an output of the hybrid energy storage unit is connected to a...
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WO/2021/070869A1 |
This control device for a three-phase brushless motor, using one shunt resistor disposed on a bus of an inverter as a drive circuit for driving the three-phase brushless motor, acquires a two-phase current of the three-phase brushless mo...
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WO/2021/069259A1 |
A method for controlling an electrical converter system (10) comprises: determining a nominal pulse pattern (t* p,i , Δu* p,i ) and a reference trajectory (x*) of at least one electrical quantity of the electrical converter system (10) ...
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WO/2021/066372A1 |
The present invention relates to a device (3) for driving a compressor of a vapourous fluid with a housing (2) that features a cooling surface and a power supply arrangement (5). The arrangement (5) exhibits at least one switching elemen...
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WO/2021/065581A1 |
The purpose of the present invention is to provide a motor drive device not only capable of, during the failure of a certain phase among a plurality of phases, continuing operation by the remaining phases but also capable of, during norm...
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WO/2021/063569A1 |
The invention relates to a protection device (1) for operating an electric machine (33) at a converter (3), comprising a first and a second conductor (4, 5) of a direct current link (2), a switching device (6) having a first and a second...
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WO/2021/065222A1 |
This power conversion device (10) is provided with: a connection path (60) for electrically connecting the negative electrode side of a first storage battery (21) and the positive electrode side of a second storage battery (22) to the ne...
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WO/2021/065369A1 |
The present invention addresses the problem of providing a rotating machine drive system comprising a winding switching device, wherein the rotating machine drive system has a relatively simple configuration, allows wear of electrical co...
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WO/2021/066996A1 |
A control system (20) and method of controlling a multi-phase electric machine (28) for controlling the flow of electrical current between a voltage source (22) and the multi-phase electric machine or other application/load. The control ...
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WO/2021/066153A1 |
This electric current detection device detects an electric current flowing through an inverter unit which includes a first switching element and a second switching element connected in series and which generates an alternating-current si...
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WO/2021/059741A1 |
This motor control device performs PWM control whereby a first element of one of an ON-selected upper arm element and lower arm element is switched on the basis of a duty ratio. Furthermore, the motor control device determines a duty com...
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WO/2021/059436A1 |
Provided is an alternating-current rotating machine apparatus that can determine, with good precision, whether a control circuit of another system has stopped operating. The alternating-current rotating machine apparatus is provided with...
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WO/2021/057338A1 |
Disclosed is an energy conversion apparatus, comprising a reversible PWM rectifier (11) and an electric motor winding (12). The electric motor winding (12) at least comprises a first winding unit and a second winding unit; both the first...
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WO/2021/058198A1 |
The invention relates to a method for controlling an electrical drive (1), wherein the electrical drive (1) comprises a converter (2) and a motor (3), wherein the converter (2) is operated with pulse width modulation. In order to improve...
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WO/2021/060014A1 |
A gate-driving power device according to the present invention provides DC power to each of a plurality of gate drive circuits with which a power converter is provided. The power converter comprises a voltage converter and one or more AC...
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WO/2021/059350A1 |
The present invention comprises an inverter (30) for supplying an AC voltage with a variable frequency and voltage value to an electric motor (7) that drives a load element the load torque of which fluctuates periodically, and a control ...
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WO/2021/050377A1 |
A segmented electrical drive system comprising a DC power bus comprising a DC voltage supply and a capacitor in parallel, an inverter comprising a plurality of inverter segments, a motor including a plurality of stator winding segments e...
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WO/2021/049248A1 |
Conventionally, changes in switching frequency, such as an increase in switching frequency, have posed the problem of causing greater switching loss in an inverter. A first electric current command generation unit 111 receives input of...
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WO/2021/048935A1 |
In the present invention, a dual inverter is connected to the open-ended three-phase coil of a three-phase motor. The three-phase coil is connected to a three-phase grid and a DC power supply. The battery-side three-phase inverter of the...
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WO/2021/047768A1 |
An electrical converter unit and a method for reducing thermal stress of a power semiconductor switch, such as an IGBT, of an electrical converter unit, the electrical converter unit comprising at least a gate control circuit wherein the...
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WO/2021/047221A1 |
A charging-discharging circuit and system, and an electric vehicle. The charging-discharging circuit comprises a battery (1), an electric motor (5), a first charging interface (6), a first bridge arm (2), a second bridge arm (3), a third...
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WO/2021/047153A1 |
A compressor driving device, a compressor pressure protection method, and an air conditioner. The compressor driving device comprises a three-phase alternating current power supply input end, a relay module (10), a rectifier circuit (20)...
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WO/2021/047130A1 |
A modular multi-level converter-based high-power motor driving system, which relates to the technical field of power generation, transformation or power distribution. The high-power motor driving system is composed of a modular multi-lev...
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WO/2021/048023A1 |
Method, device and system for managing a mining facility (150 A-N) including a plurality of systems is disclosed. The method comprises generating, on a simulation unit (102, 330), system models (210, 220, 230, 240) for one or more system...
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WO/2021/043769A1 |
The subject of the invention is a method for ascertaining the direction of rotation of a rotating field, wherein the rotating field is generated by three phase-offset AC currents. The rotating field corresponds to a rotating magnetic fie...
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WO/2021/045021A1 |
A rotating electrical machine (10) control device (50) is applied in a system provided with a power conversion circuit (20) electrically connected to a rotating electrical machine, and a capacitor (21) electrically connected to an input ...
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WO/2021/038670A1 |
This estimation device (9) comprises a phase current determination unit (12), a time difference calculation unit (13), and an estimation unit (15). The phase current determination unit (12) performs a determination process for determinin...
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WO/2021/038817A1 |
A control unit (160) turns off the three switching elements of the upper arms of an inverter 120 and turns on the three switching elements of the lower arms thereof, thereby setting the three-phase AC voltage output from the inverter (12...
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WO/2021/038617A1 |
A power conversion control device for electric vehicles that is small and inexpensive and has a low current consumption is obtained. Respective insulated power supplies (6a) to (6f) that form pairs are connected to gate drive circuits (5...
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WO/2021/036794A1 |
Provided in the present invention are a control method and a controller. The method comprises: collecting the rotor position of a permanent magnet synchronous motor, the rotational speed of the motor, a quadrature-axis current, a direct-...
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WO/2021/031929A1 |
The present invention pertains to the technical field of air conditioners, and particularly relates to an inverter air conditioner, a field-weakening control limit voltage configuration method for the same, and a control method. The pres...
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WO/2021/032391A1 |
The invention relates to a method and to a power converter (3) for producing a motor voltage for an electric motor (7) of a switch drive (5) of an electrical switch (1). In the method, a DC link direct voltage is produced from a supply v...
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WO/2021/033489A1 |
The objective of the present invention is to suppress torque ripples by enabling superimposition of a harmonic component in a high frequency domain. In a DC-DC converter 31, a voltage that is input from a power source (external battery B...
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WO/2021/029407A1 |
A dynamo-electric machine control device (10) controls the drive of a rotary electric machine (80) having motor windings (180, 280). A plurality of control units (150, 250) have drive control units (151, 251), mode selection units (152, ...
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WO/2021/025078A1 |
An EPS control device (2) having two electrical systems derived by external power supplies (6A, 6B) comprises, in each of the electrical power systems: inverters (11A, 11B) that drive a motor (1); control circuits (12A, 12B) that control...
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WO/2021/025522A1 |
A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of freque...
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WO/2021/018829A1 |
The invention relates to a control device (8) for an inverter (2) supplying an electric machine (3), wherein the control device (8) is designed to provide pulse-width modulated switch signals (15) with a carrier frequency for controlling...
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WO/2021/018827A1 |
The invention relates to a control device (8) for an inverter (2) supplying an electric machine (3), wherein the control device (8) is designed to provide pulse-width modulated switch signals (15) with a carrier frequency for controlling...
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WO/2021/019662A1 |
Provided are a control device for an AC rotating electric machine and a power steering device by which a cancellation current for canceling out torque ripple components can be superimposed on a winding current in a field-forward manner, ...
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WO/2021/019608A1 |
A dual inverter serving also as a grid connection on-board charger has a grid side three-phase inverter and a battery side three-phase inverter, said grid side three-phase inverter being connected to a non-split open-end three-phase coil...
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WO/2021/020018A1 |
The main purpose of the present invention is to provide a power supply device, a power supply method, and a power supply program which can suppress an increase in cost. The present invention comprises: a capacitor that is connected betwe...
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WO/2021/014947A1 |
Provided is a motor control device capable of suppressing noise. The motor control device (100) is provided with: a control unit (20) for generating PWM signals corresponding to the respective phases (U, V, W) of a motor (4); an invert...
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WO/2021/014650A1 |
This rotator control device (100) is characterized by comprising: a voltage applying unit (3) for applying a voltage to a three-phase rotator (1); a current detecting unit (4) for outputting current information which indicates informatio...
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