Takayoshi K Matsuo

6906491, Jun 14, 2005

Jun 20, 2003

10/600489

Takayoshi Matsuo - Brown Deer WI, US
Satoshi Tanabe - Yokosuka, JP
Masazumi Yoshino - Yokohama, JP

Rockwell Automation Technologies, Inc. - Mayfield Heights OH
Reliance Electric Limited - Yokohama

H02P001/46
H02P007/36
H02P001/18
G05B001/06

318722, 318721, 318801, 318806, 318638, 318352, 318138, 318439, 318254

A motor controller is provided including a synchronous motor, a feed back detector for detecting the position and velocity of the rotor of the synchronous motor, a detector for detecting a magnetic pole position of the rotor of the synchronous motor, an inverter for controlling an electric power to be supplied to the synchronous motor, an estimator for estimating the magnetic pole position of the rotor of the synchronous motor, and a detector for detecting the abnormality of the feed back detector.

7034501, Apr 25, 2006

Feb 28, 2005

11/068351

Jerry D. Thunes - Greenfield WI, US
Russel J. Kerkman - Milwaukee WI, US
Takayoshi Matsuo - Brown Deer WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 5/17

318812, 318810, 318811

Methods and apparatus for controlling switching in a DC-to-AC inverter to prevent overvoltages applied to an AC motor by determining the switching order of the phase voltage signals, providing gating signals at switching intervals by modulating a carrier wave with the phase voltage signals, comparing the switching intervals to a predetermined minimum time interval sufficient for reflected wave transients to dissipate, and adjusting the switching intervals to be at least equal to the predetermined minimum time interval.

7095209, Aug 22, 2006

Jan 31, 2005

11/047453

Jerry Dee Thunes - Greenfield WI, US
Thomas J. Rehm - Mequon WI, US
Takayoshi Matsuo - Brown Deer WI, US
Masahiro Tsuyoshi - Menomonee Falls WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 21/14

318825, 318727, 318802, 318807, 318772

A method and apparatus for use with a controller for controlling a machine wherein a torque reference value is provided, the method for identifying an error representative of the difference between the torque reference value and the torque applied to the machine and using the error value to modify machine operation.

7148635, Dec 12, 2006

Sep 21, 2005

11/231628

Richard W. Piefer - Brookfield WI, US
Thomas J. Rehm - Mequon WI, US
Takayoshi Matsuo - Brown Deer WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 5/46

318 85, 318 34, 318 41, 318 68, 318 52

A motor control system for controlling a motor includes control logic and a motor controller. The control logic is operable to generate a control signal at a first periodic time responsive to a synchronization signal. The motor controller is operable to generate a drive signal for the motor based on the reference signal at a second periodic time synchronized with respect to the first periodic time.

7187155, Mar 6, 2007

May 14, 2004

10/846315

Takayoshi Matsuo - Brown Deer WI, US
Jerry Thunes - Greenfield WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 21/08
H02P 23/08

318807, 318727, 318798, 318799, 318801, 318803, 318806, 318808, 318804, 318254

An electronic drive for vector control of an induction motor controls slip and operating frequency in response to changes in stator voltage. The drive includes a torque control loop, a flux control loop and a frequency control loop. The control is based on a commanded stator current that is resolved into a torque-producing, or q-axis, current component and a flux-producing, or d-axis, current component that are in quadrature. The frequency control loop includes slip control in which a slip frequency command is produces based on a value for the leakage inductance of the motor. The leakage inductance value dynamically varies as a function of the q-axis current reference command.

7279865, Oct 9, 2007

Sep 20, 2005

11/231014

Takayoshi Matsuo - Brown Deer WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 27/04

318801, 318800, 318806, 318809, 318811, 318799, 318798, 318767

A motor drive unit includes a controller, a voltage inverter, and a speed estimator. The controller is operable to generate at least one command signal for controlling a motor associated with the motor drive unit. The voltage inverter is operable to generate motor drive signals to be applied to the motor based on the command signal. The speed estimator is operable to estimate a speed of the motor when the voltage inverter is not providing the motor drive signals. The speed estimator is further operable to receive two-axis voltage measurements associated with the motor, determine flux angles for the motor based on the two-axis voltage measurements, and estimate the speed based on the determined flux angles.

8179065, May 15, 2012

Apr 30, 2008

12/113148

Takayoshi Matsuo - Brown Deer WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 6/00

3184001, 31840004, 31840006, 31840032, 318700

Systems and methods of controlling a permanent magnet motor without a mechanical position sensor are provided. In accordance with one embodiment, a motor control system includes an inverter configured to receive direct current (DC) power and output a power waveform to a permanent magnet motor, driver circuitry configured to receive control signals and drive the inverter based upon the control signals, a current sensor configured to determine a sampled current value associated with the power waveform, and control circuitry configured to generate the control signals based at least in part upon a comparison of a flux-producing component of the sampled current value and a flux-producing component of a command reference current value.

8324851, Dec 4, 2012

Mar 4, 2009

12/397413

Takayoshi Matsuo - Brown Deer WI, US
Thomas J. Rehm - Mequon WI, US

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

H02P 1/04

31840033, 31840034, 31840035, 31840038, 318799, 318809

A method for determining the position of a rotor in a permanent magnet synchronous motor includes applying voltage pulses to the windings at successive electrical angles while the motor is at a standstill. The resultant current is sampled. The position of a maximum current is determined by identifying an segment of an electrical cycles which includes the maximum current, and using a spline interpolation to model the current flow in this segment. The maximum current is then correlated to the position of the rotor.