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US 2020/0132149 A1Published application
Motor brake system
AssigneeRockwell Automation Technologies, Inc.
InventorsChetan Chandrasekara, Arun K. Guru
Life of this patent
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Abstract
A motor includes a housing containing a rotor and stator. A brake assembly is adapted to restrain rotation of the rotor. A brake controller includes a brake diagnostics system. At least one vibration sensor is located in the housing and provides vibration data to the brake diagnostics system in response to a brake operation cycle of the brake assembly. The vibration data is used by the brake diagnostics system to assess an operative condition of the brake assembly.
Claims20
A motor comprising:
- a housing including a rotor and stator;
- a brake assembly adapted to restrain rotation of the rotor;
- a brake controller comprising a brake diagnostics system;
- at least one vibration sensor located in the housing and providing vibration data to the brake diagnostics system in response to a brake operation cycle of the brake assembly, wherein said vibration data is used by the brake diagnostics system to assess an operative condition of the brake assembly.
1 more element
A brake condition diagnostic method for an electric motor, said method comprising:
- sensing vibration data from a vibration sensor located in a housing of a motor during a sensing window when a brake assembly cycles between an engaged condition and a disengaged condition;
- filtering said vibration data to isolate at least one of a low frequency region of interest and a high frequency region of interest;
- converting said filtered vibration data to a frequency domain;
- assessing an operative condition of the brake assembly based upon at least one feature of said vibration data in said frequency domain.
1 more element
Dependencies are inferred from the claim text.