公开(公告)号：US20230086978A1

公开(公告)日：2023-03-23

申请号：US17483237

申请日：2021-09-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Nandini Ganesan ,  Mark T. Ortell ,  Sawyer J. DeSotelle

IPC: H02P3/04 ,  F16D65/14

Abstract: A method and system for monitoring operation of a brake control circuit periodically verifies that redundant output control channels transition between ON and OFF states. A controller generates separate brake release signals for each of the redundant output control channels. The brake release signals are combined to form a brake command signal used to control operation of the brake coil. An input channel on the controller receives a signal corresponding to the current state of the brake command signal to monitor brake operation. The controller periodically modulates the brake release signals on each channel between an ON and an OFF state. The modulation is observed on the brake command signal to verify that each output channel is able to change state. The modulation occurs at a frequency greater than a response frequency of the brake coil such that the brake coil remains energized during modulation of each output channel.

公开(公告)号：US20220253019A1

公开(公告)日：2022-08-11

申请号：US17172122

申请日：2021-02-10

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Mark T. Ortell ,  Kevin J. Riederer ,  Aleksey Yegorov ,  Sawyer J. Desotelle

IPC: G05B9/02 ,  B60W10/08 ,  B60W10/196

Abstract: An improved system and method for providing safety-rated operation of a motor and motor drive controlling operation of a load with stored potential energy includes a two-channel method of monitoring and retaining control of the load. A first safety channel is configured to control operation of a holding brake, which provides sufficient holding force to retain the stored potential energy in the load. A second safety channel is configured to independently enable and disable torque production from the motor drive controlling operation of the motor. When torque production from the motor drive is enabled, the motor drive and motor are able to provide sufficient torque to retain the stored potential energy in the load. Monitoring and subsequent control of each safety channel is provided to ensure that a single failure in either channel will not cause the unexpected release of the stored potential energy from the load.