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Matches 1 - 50 out of 17,009

Document Document Title
WO/2021/081968A1
A parameterless position-sensorless permanent magnet synchronous motor control method based on MTPA. The control method comprises a current control mode and comprises steps: step 1, receiving a given current Idq* and a γ angle inputted ...  
WO/2021/082476A1
The present invention relates to an alternating current motor control method, in particular to a permanent magnet synchronous motor control method, capable of solving the problem that torque accuracy of motor output and motor operation e...  
WO/2021/084739A1
A motor inductance measurement device (50) that measures inductance information (InfL) that includes characteristics (56a, 56b) of the instantaneous value of alternating-current flux (ΦqsAC) relative to the instantaneous value of altern...  
WO/2021/083590A1
The invention relates to a method for calibrating the control of an electrical machine, comprising the steps of: applying at least one electrical test signal having a specified direction in a d-q coordinate system to the electrical machi...  
WO/2021/073933A1
A method for estimating a temperature in an electric motor is provided. The method comprises the step: estimating a temperature in a coil of the electric motor based on previously estimated electric properties of the motor by a parameter...  
WO/2021/074094A1
The invention relates to a method for operating a brushless and sensorless multi-phase electric motor (4), wherein at least two phase voltages (UU, UV, UW) and at least two phase currents (IU, IV, IW) of the electric motor (4) are determ...  
WO/2021/073934A1
A method for Controlling a drive System (1) including a synchronous motor (3) having several phases comprises the steps: providing appropriate operating Parameters for the synchronous motor (3) by processing input of the drive System (1)...  
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...  
WO/2021/069479A1
A motor system comprises a motor comprising: a stator with a plurality of subwindings each having a plurality of phase connections for receiving phase voltages, wherein each of the subwindings is electrically insulated from each of the o...  
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...  
WO/2021/068471A1
Disclosed is a method for determining the stalled state of a permanent magnet synchronous motor under position sensor-free vector control, which comprises the following steps: step A: calculating the input power Pin and output power Pout...  
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) ...  
WO/2021/062725A1
An electric motor control method, apparatus and device. The method comprises: starting from a preset target position, using a first vector voltage to control a rotor of an electric motor to rotate in a first direction, and when it is det...  
WO/2021/063293A1
Disclosed is a method for fitting a control curve of MTPA of a permanent magnet synchronous motor, belonging to the field of motor control. The method comprises: obtaining, in real time, motor parameters ψf, Ld and Lq of a permanent mag...  
WO/2021/064308A1
The invention relates to a multi-star multi-phase synchronous machine with disconnected neutrals, in which a current regulator (20) is provided for each of the stars, which delivers direct ud and quadratic uq voltage values from differen...  
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 ...  
WO/2021/067059A1
A drain cleaning machine includes a brushless direct current (DC) motor configured to rotate a snake about the snake axis. An electronic processor is configured to control power switching elements to drive the brushless DC motor. In a fi...  
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...  
WO/2021/061407A1
Methods and apparatus to control a three-phase BLDC motor with a curve transformer having an index value for each stored input value and output value for providing stored corner points for outputs of the curve transformer. The curve tran...  
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 ...  
WO/2021/054033A1
The present invention highly accurately estimates torque in all regions during low output and high output. In this invention, a first torque estimation unit 33 estimates a first estimated torque value using a cross product method and a s...  
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...  
WO/2021/050288A1
A variable speed drive for an electrostatic motor provides feedback control according to rotor position and/or rotor rotational rate deduced from back currents (back- MMF). Extraction of the back currents is performed by a modeling of th...  
WO/2021/050104A1
A system includes a motor operating with an angular velocity and an operational current, a motor controller circuit to issue control signals to the motor, and a stator resistance calculation circuit. The calculation circuit is to introdu...  
WO/2021/047832A1
The invention relates to a method for determining a saturation characteristic of a synchronous reluctance machine (1), said method comprising the steps of: applying a voltage sequence to a stator (2) of the synchronous reluctance machine...  
WO/2021/044325A1
It is disclosed a method for sensorless estimation of a position error signal (ϵθ) for a synchronous reluctance machine (5), said synchronous reluctance machine (5) comprising a stator and a rotor, said method comprising: receiving an ...  
WO/2021/044457A1
This power conversion device comprises an inverse conversion device, a current detector, a frequency analysis unit, a storage unit, a determination unit, a reference rate change unit, and a velocity control unit. The inverse conversion d...  
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...  
WO/2021/037533A1
The invention relates to a method for operating an electric machine (100) which is supplied with voltage by a converter with which a DC voltage is converted into an AC voltage, wherein phase voltage values (Ua, Ub, Uc) to be applied to t...  
WO/2021/039054A1
The present invention addresses the problem of improving the efficiency of work employing a tool. An electric tool (100) is provided with a motor (1), an operating unit (70), a control unit (3), a transmission mechanism (4), and a switch...  
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-...  
WO/2021/033432A1
The present invention addresses the problem of providing an electric power tool in which it is possible to raise, if necessary, the upper limit for the working torque of an electric motor. This electric power tool (1) is provided with: a...  
WO/2021/031685A1
The present invention relates to the technical field of electric locomotive traction control, and specifically to a control modulation method for a high power direct drive permanent magnet synchronous motor. In order to realize accurate ...  
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...  
WO/2021/017237A1
Disclosed are a deadbeat control system and method for a permanent magnet synchronous motor under a low carrier ratio. Said system comprises a permanent magnet synchronous motor, an encoder, an abc-dq coordinate conversion unit, an outer...  
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, ...  
WO/2021/016183A1
A method of operating a multi-phase electric machine includes operating a six-phase machine with six phases that are configured into a first group having a first neutral connection and a second group having a second neutral connection. T...  
WO/2021/013501A1
The invention relates to a method for estimating the torque of a wound-rotor electric machine, comprising the steps of: receiving values of the currents of the phases (la, Ib, lc) of the stator and of the rotor current (If) of said elect...  
WO/2021/008379A1
A hill-hold capacity improving method and device. Said method comprises: when a vehicle enters a hill-hold mode, acquiring an angle of a rotor of a motor and at least two phases of alternating currents flowing through the motor (201); ca...  
WO/2021/001201A1
The invention relates to a method for operating a drive assembly (2) of a motor vehicle (1), which drive assembly has an electric machine (3), wherein a target torque is specified for the electric machine (3) according to a torque requir...  
WO/2020/262269A1
According to the present invention, among control periods of an electric motor (M), which are formed of first to third periods, in the first period in which a peak of a first AC voltage (Vv) exists, a V-phase modulation wave (Vv*) accord...  
WO/2020/261751A1
This power conversion device comprises: a power converter including a switching element; and a control unit which controls the power converter. The control unit calculates a torque electric current detection value and an excitation elect...  
WO/2020/260454A1
The invention relates to a method for controlling, by means of field-oriented control, an active rectifier electrically connected to a stator of a wind turbine, wherein the generator comprises a stator having an axis of rotation about wh...  
WO/2020/260037A1
The present invention provides a control system (10) for an electrical machine (EM) for generating a braking torque by means of the electrical machine (EM) at a traction drive, comprising a control device (SE), wherein the control device...  
WO/2020/253821A1
Provided is a ride-on lawnmower, comprising: a travel component, a power output component, a power supply device, a drive circuit, an operating device, and a control module; the travel component comprises a travel wheel and a first motor...  
WO/2020/244954A1
The invention concerns a method for estimating the electromagnetic torque of a three-phase synchronous machine with permanent magnets, which involves: measuring the stator phase currents and voltages in a fixed three-phase reference fram...  
WO/2020/245385A1
A doubly-fed induction generator (DFIG) system (100) is described. The DFIG system (100) includes an induction electric machine (102) including a stator having a stator winding and a rotor having a rotor winding. The stator winding is el...  
WO/2020/237310A1
A motor comprising first and second rotors and a stator, wherein the first rotor comprises an arrangement of a plurality of first magnets and the second rotor comprises an arrangement of a plurality of second magnets, wherein each arrang...  
WO/2020/240748A1
A control device (1) of a rotating machine controls a rotating machine (2) on the basis of rotational velocity information of the rotating machine (2). The control device (1) comprises a rotational velocity selection unit (48). When shaf...  
WO/2020/243549A1
A motor drive system and method for determining an optimized efficiency of the motor drive system are provided. The motor drive system includes a system controller, a motor drive having includes an inverter configured to generate the AC ...  

Matches 1 - 50 out of 17,009