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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...
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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...
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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...
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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)...
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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/2021/069479A1 |
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...
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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/2021/068471A1 |
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...
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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/2021/062725A1 |
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...
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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...
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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...
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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/2021/067059A1 |
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...
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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/2021/061407A1 |
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...
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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/2021/054033A1 |
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...
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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/2021/050288A1 |
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...
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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...
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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...
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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 ...
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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...
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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/2021/037533A1 |
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...
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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...
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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/2021/033432A1 |
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...
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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 ...
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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/2021/017237A1 |
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...
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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/2021/016183A1 |
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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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WO/2020/232756A1 |
Disclosed are a motor controller, and a motor control method and device. The method comprises the following steps: generating a first-axis current and a second-axis current according to a target torque and the current rotational speed; p...
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WO/2020/234971A1 |
The present invention provides a motor driving device (105) for controlling the driving of an AC motor (1) connected to a mechanical device (2) having a periodic load torque pulsation using dq rotation coordinates, wherein the motor driv...
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WO/2020/228201A1 |
A method for controlling a smooth start of a permanent magnet synchronous motor under sensor-less vector control. After a permanent magnet synchronous motor is started, a mode thereof is set as a constant-torque operating mode or a const...
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