초록 ▼

An ac machine monitor, particularly applicable to ac induction motors, provides information for ascertaining the health and condition of the motor. The monitor is self-contained, having its own internal power source, electronics, and sensor suite, and attaches directly to the outer frame of the moto

An ac machine monitor, particularly applicable to ac induction motors, provides information for ascertaining the health and condition of the motor. The monitor is self-contained, having its own internal power source, electronics, and sensor suite, and attaches directly to the outer frame of the motor. Sensors disposed within the monitor include a motor frame temperature sensor, flux sensor, vibration sensor, and clock. An ambient temperature sensor enables determination of motor frame temperature relative to ambient. Sensor outputs are processed and analyzed by monitor electronics to determine various life history parameters, including motor speed and load, which are stored in electronic memory. A communications port enables a peripheral device, such as a notebook computer or portable data collector, to communicate with the monitor and download the life history parameters stored in memory. Downloaded data can be further analyzed and statistically compared to trend data at a base computer to ascertain the health and condition of the motor. The monitor electronics are configured to consume very little power so that the internal power source will continue to power the monitor for several years.

대표청구항 ▼

[ What is claimed is:] [1.] A monitor that attaches to an ac electric motor, said monitor comprising:a structural enclosure;an engagement surface formed on said enclosure;means for attaching said enclosure to the motor so that said engagement surface is adjacent the motor;a power source disposed in

[ What is claimed is:] [1.] A monitor that attaches to an ac electric motor, said monitor comprising:a structural enclosure;an engagement surface formed on said enclosure;means for attaching said enclosure to the motor so that said engagement surface is adjacent the motor;a power source disposed in said enclosure for supplying dc electrical power to the monitor;sensors disposed in said enclosure for sensing a plurality of sensed parameters of the motor and producing a plurality of sensor signals corresponding to the sensed parameters;a signal processor disposed in said enclosure for receiving and processing the sensor signals to produce operating parameters of the motor based on the sensed parameters;means for storing the operating parameters, said stored operating parameters corresponding to the operation history of the motor; andmeans for outputting at least the stored operation history of the motor.