Induction motor health monitoring method
AssigneeParker-Hannifin Corporation
InventorsEric Polcuch, Bradley Conn
Life of this patent
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Abstract
A system and method for determining the health of a motor drive system is provided, where a motor is coupled to a common motor control and a single or plurality of other motors are coupled to the common power source. Current data corresponding to current provided to the motor is obtained via a sensor connected to an electrical input of the motor, and voltage data corresponding to a voltage provided by the common motor control is also obtained. Based on the current data and the voltage data, a motor current provided to the motor and a motor voltage to current phase shift (or power factor) are determined, and the health of the motor drive system is determined from the motor phase shift (or power factor) and the motor current.
Claims19
A system for determining the health of a motor drive system, comprising:
- a common motor controller;
- at least one motor electrically coupled to the common motor controller, wherein the common motor controller controls a voltage applied to the at least one motor;
- at least one current sensor operatively coupled to a respective motor of the at least one motor;
- and
- a monitor coupled to the at least one current sensor and communicatively coupled to the common motor controller, the monitor configured to:
- obtain voltage data from the common motor controller corresponding to thea voltage applied by the common motor controller to the at least one motor;
- obtain from each of the at least one current sensor a motor current for the respective motor;
- determine, based on the motor current and the voltage data, at least one of a motor phase shift or power factor;
- and
- determine the health of the motor drive system based on the at least one motor phase shift or power factor and the motor current.
A method for determining the health of a motor drive system that includes at least one motor coupled to a common motor controller, the method comprising:
- obtaining, via a sensor connected to an electrical input of the at least one motor, current data corresponding to current provided to the at least one motor;
- obtaining voltage data corresponding to a voltage provided by the common motor controller;
- determining, based on the current data and the voltage data, at least one of a motor phase shift or power factor;
- and
- determining the health of the motor drive system based on the motor current and the at least one motor phase shift or power factor;
- wherein the monitor is part of a motor drive controller that controls power provided by the common motor controller.
Dependencies are inferred from the claim text.