Rockwell Automation Technologies Incorporated

Allen-bradley Company, LLC

Rockwell Technologies, Inc.

Peter B Schmidt

Thomas Arthur Nondahl

Jingbo Liu

Semyon Royak

Jingya Dai

Thomas J Rehm

Mark Melvin Harbaugh

Ehsan Al-Nabi

Robert J Breitzmann

Timothy M Rowan

Michael Lee Gasperi

Robert H Schmidt

Wei Qian

Takayoshi Matsuo

Aderiano M Da Silva

John Joseph Golownia, Jr

Kevin O Delaney

Brian P Delaney

Robert John Breitzman

Sang Hoon Lee

Mark H Harbaugh

Keith M Hogan

John G Searle

Thomas M Cahill

John Joseph Golownia

Zhengrong Li

Wei S Qian

John Joseph Golownia Jr

In one embodiment, a tangible, non-transitory computer readable medium stores instructions that, when executed by a processor, are configured to cause the processor to receive a first set of inputs including a motion profile of a machine, a mechanical design of the machine, or both, generate a number of axis solutions for one or more actuators, drives, and load transmission components based on a model using the first set of inputs, generate a production rate versus amount of energy consumed per part curve for each of the number of axis solutions, and display the production rate versus amount of energy consumed per part curves for each of the number of axis solutions. One of the curves includes a point on the curve indicative of a lowest amount of energy consumed for a desired production rate range.

Systems and methods to enhance machine designs and production rate schedules for minimized energy cost

Disclosed examples include power conversion systems and methods to operate an inverter to drive a motor load through an intervening output filter, a transformer and a cable, including a current regulator to compute a command value according to a current reference value and a motor current feedback value, a cross-coupled feedforward component to compensate the command value by an estimated cross-coupled voltage value to compute a control output value, a cross-coupled object component to compute the motor current feedback value according to a voltage value using a plant transfer function representing the output filter, the transformer, the cable and the motor load, and a controller to provide the inverter switching control signals to control the inverter according to the control output value.

Feedforward control of motor drives with output sinewave filter

Disclosed examples include power conversion systems, methods and computer readable mediums to operate an inverter to drive a motor load through an output filter, in which a control output value is computed according to a current reference value and a current feedback value using a proportional-integral (PI) current regulator, the control output value is filtered using a lag compensator filter to compute an inverter output command value, and the inverter is controlled according to the inverter output command value.

Current control of motor drives with output sinewave filter

Disclosed examples include power conversion systems, methods and computer readable mediums to operate an inverter to drive a motor load through an intervening filter, by computing a speed error value according to a speed reference value and a speed feedback value, computing a torque reference value according to the speed error value, computing a motor current reference value according to the torque reference value, compensating the motor current reference value according to capacitor currents of the output filter using a transfer function representing an output current to input current amplitude vs. frequency behavior of the output filter and the motor load, and controlling the inverter according to the inverter output current reference value.

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

Motor drives, methods and estimation systems are presented for estimating a rotor position of a motor load in which four sets of inverter output current samples obtained at four different sample times in a given inverter PWM cycle are converted into a corresponding stationary reference frame current value pairs, and the rotor position estimate is computed according to the stationary reference frame current values.

Rotor position estimation apparatus and methods

Motor drive control apparatus and methods are presented for speed reversal control for drives used with output filters and transformers using a high or maximal drive current command to facilitate dissipation of regenerative energy seen in this system during speed reversal with open loop control to reverse the spin direction of a driven motor while quickly transitioning through zero speed.

Method and apparatus for speed reversal control of motor drive

Methods and systems are presented for closed loop motor speed and torque control without a sensor at the motor, in which configuration parameters are received from a user interface to define operating characteristics of a filter, a transformer, a cable, and the motor coupled with the output of a motor drive, and an object model of the motor drive is configured according to the filter, transformer, cable and motor configuration parameters to facilitate sensorless closed loop motor speed and/or torque control.

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

Disclosed examples include methods, computer readable mediums and motor drive power conversion systems for sensorless speed control of a motor driven by an inverter through an intervening filter, a transformer and a motor cable, in which sensorless vector control is used to regulate the motor speed based on a speed feedback value computed according to voltage or current values associated with the motor drive using an observer having formulas and impedance parameters of the filter, the transformer, the motor cable and the motor.

Sensorless motor drive vector control

Motor drive control apparatus and methods are presented for sensorless control of a driven motor using open loop current regulated control during low-speed operation and an EMF-based position observer for position estimation during higher speed operation, with zero feedback speed during low-speed open-loop operation and feedback speed estimated by the EMF-based observer during high-speed operation and with velocity mode control over the full speed range and mode control hysteresis for smooth transitions between open loop and EMF-based observer control.

Transition scheme for position sensorless control of AC motor drives

A power converter, control apparatus and methods are presented for driving a permanent magnet motor or other load through a sine wave filter and a transformer, in which inverter output current is controlled using a current-frequency relationship to convert a desired frequency or speed value to a current setpoint, and the inverter output current is regulated to the current setpoint using a control algorithm with a bandwidth below the resonant frequency of the sine wave filter.

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

Power converters and methods are presented for driving an AC load connected through an intervening filter circuit, in which at least one filter current or voltage signal or value is determined according to feedback signals or values representing an output parameter at an AC output of the power converter, and AC electrical output power is generated at the AC output based at least partially on the at least one filter current or voltage signal or value.

Method and apparatus for controlling power converter with inverter output filter

Motor drives and control methods are presented for sensorless motor speed control in which inverter output currents are sampled from the inverter output and a frequency modulation value is determined based on the current feedback. A speed or frequency setpoint is adjusted at least partially according to the frequency modulation value to provide an adjusted frequency or speed setpoint value that is then used in controlling the inverter to provide stability control to mitigate hunting or motor stoppage.

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

Motor drives and control methods are presented for sensorless motor speed control in which inverter output currents are sampled from the inverter output, and a frequency modulation value is determined based on the current feedback and either one or more voltage commands or one or more voltage feedback signals. A speed or frequency setpoint is adjusted at least partially according to the frequency modulation value to provide an adjusted frequency or speed setpoint value that is then used in controlling the inverter to provide stability control to mitigate hunting or motor stoppage.

Growing community of inventors

Franklin, WI, United States of America

Peter B Schmidt