Actuator with diagnostics

摘要

A system incorporating an actuator. The actuator may have a motor unit with motor controller connected to it. A processor may be connected to the motor controller. A coupling for a shaft connection may be attached to an output of the motor unit. The processor may incorporate a diagnostics program. The processor may be connected to a polarity-insensitive two-wire communications bus. Diagnostic results of the diagnostics program may be communicated from the processor over the communications bus to a system controller. If the diagnostic results communicated from the processor over the communications bus to the system controller indicate an insufficiency of the actuator, then an alarm identifying the insufficiency may be communicated over the communications bus to the system controller.

主权项

1. An actuator system for use with heating, ventilating and air conditioning equipment, comprising:
one or more actuators; and wherein an actuator comprises:
a motor control mechanism;a motor connected to the motor control mechanism;a gear train connected to an output of the motor;an actuator shaft attached to the gear train;a shaft position indicator connected to the actuator shaft;a processor connected to the motor control mechanism and the shaft position indicator; anda current sensor connected to the motor control mechanism; andwherein:the processor comprises a diagnostics program;the processor is configured to provide an excessive power alarm if an immediate power consumption of the actuator exceeds a predetermined percentage over a given amount of measured power consumption by the motor considered to be during normal operation of the actuator.