Inventor

ROYAK SEMYON

US34 patents

⚠️ This page may combine multiple inventors who share the name “ROYAK SEMYON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ROYAK SEMYON

ROCKWELL AUTOMATION TECH INC

Flux position identifier using high frequency injection with the presence of a rich harmonic spectrum in a responding signal

Stator and rotor resistance identifier using high frequency injection

Sensorless motor drive vector control

Transition scheme for position sensorless control of AC motor drives

Method and apparatus for phase current balance in active converter with unbalanced AC line voltage source

Flux position identifier using high frequency injection

System and method for protecting a motor drive unit from motor back EMF under fault conditions

Method and apparatus for rejecting the second harmonic current in an active converter with an unbalanced AC line voltage source

Position sensorless open loop control for motor drives with output filter and transformer

Method and apparatus for controlling power converter with inverter output filter

Methods and systems for sensorless closed loop motor speed and torque control

Method and apparatus for identifying orientation of a stationary rotor in a sensor-less PMSM

Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applications

Current control of motor drives with output sinewave filter

Sensorless motor drive vector control with feedback compensation for filter capacitor current

Feedforward control of motor drives with output sinewave filter

Universal adaptive torque control for PM motors for field-weakening region operation

System and method for universal adaptive torque control of permanent magnet motors

Control of motor drives with output sinewave filter capacitor current compensation using sinewave filter transfer function

LIU JINGBO

Position sensorless open loop control for motor drives with output filter and transformer

Method and apparatus for automatically identifying electrical parameters in a sensor-less PMSM

Method and apparatus for estimating rotor position in a sensorless synchronous motor

Rotor position estimator for an electrical machine

Method and apparatus for stability control of open loop motor drive operation

Method and apparatus for controlling power converter with inverter output filter

ROYAK SEMYON

Methods and apparatus for active front end filter capacitor degradation detection

High dynamic control apparatus for current source converter

Active front end power converter with diagnostic and failure prevention using peak detector with decay

Method and apparatus for increased current stability in a PWM drive

Torque limit of PM motors for field-weakening region operation

NONDAHL THOMAS

Method and apparatus for stability control of open loop motor drive operation

Method and apparatus for speed reversal control of motor drive

RELIANCE ELECTRIC IND CO

Slip adjuster for use in electrical motor controllers

BREITZMANN ROBERT J

Method and apparatus for overvoltage protection and reverse motor speed control for motor drive power loss events