Electrical motor monitoring system and method

A motor monitoring system comprising:

• an on-site motor instrument unit having an on-site motor sensor for monitoring a motor, wherein the on-site sensor generates a signal representative of a first motor condition;
• an on-site motor computer unit electronically connectable to the on-site motor measurement unit, and processing the signal representative of the first motor condition;
• an off-site motor control center having a remote sensor for remotely monitoring a second motor condition, wherein the remote sensor generates a signal representative of a second motor condition;
• an off-site motor control center computer unit electronically connectable to the off-site motor control center and processing the signals representative of the second motor condition;
• a communications link between the on-site motor computer unit and the off-site computer;
• and
• a third motor condition, which is monitored when the motor is off-line, and data regarding the third motor condition is stored a database.

A motor monitoring system comprising:

• an on-site motor instrument unit having an on-site motor sensor for monitoring a motor, wherein the on-site sensor generates a signal representative of a first motor condition;
• an on-site motor computer unit electronically connectable to the on-site motor measurement unit, and processing the signal representative of the first motor condition;
• an off-site motor control center having a remote sensor for remotely monitoring a second motor condition, wherein the remote sensor generates a signal representative of a second motor condition;
• an off-site motor control center computer unit electronically connectable to the off-site motor control center and processing the signals representative of the second motor condition;
• and
• a communications link between the on-site motor computer unit and the off-site computer, wherein the communications link is an Ethernet network in communication with the off-site motor control center computer unit and the on-site motor computer unit.

A method for monitoring a motor using an on-site motor instrument unit having an on-site motor sensor, an on-site motor computer unit electronically connectable to the on-site motor measurement unit, an off-site motor control center having an off-site sensor, an off-site motor control center computer unit electronically connectable to the off-site motor control center, and a communication link between the on-site motor computer unit and the off-site computer, wherein the method comprises the steps of:

• a. the on-site sensor monitoring a first motor condition at the motor and providing data on the first motor condition to the on-site motor computer unit;
• b. the on-site sensor monitoring a second motor condition remotely from the motor and providing data on the second motor condition to the off-site motor control center computer unit;
• c. transmitting the data on at least one of the first motor condition and the second motor condition to at least one of the on-site motor computer unit and the off-site motor control center computer unit;
• d. synchronizing the data on the first motor condition with the data on the second motor condition.

A method for monitoring a motor using an on-site motor instrument unit having an on-site motor sensor, an on-site motor computer unit electronically connectable to the on-site motor measurement unit, an off-site motor control center having an off-site sensor, an off-site motor control center computer unit electronically connectable to the off-site motor control center, and a communication link between the on-site motor computer unit and the off-site computer, wherein the method comprises the steps of:

• a. the on-site sensor monitoring a first motor condition at the motor and providing data on the first motor condition to the on-site motor computer unit;
• b. the on-site sensor monitoring a second motor condition remotely from the motor and providing data on the second motor condition to the off-site motor control center computer unit;
• c. transmitting the data on at least one of the first motor condition and the second motor condition to at least one of the on-site motor computer unit and the off-site motor control center computer unit, wherein the data on the first motor condition and the second motor condition are captured in response to a predetermined external event;
• d. synchronizing the data on the first motor condition with the data on the second motor condition.

A motor monitoring system comprising:

• a motor at a motor site;
• an on-site motor measurement unit having an on-site motor sensors mounted proximate to the motor, wherein the on-site sensor generates a signal representative of a first motor condition;
• an on-site motor computer unit electronically connected to the on-site motor measurement unit, and processing the signal generated by the on-site motor sensor, wherein the on-site motor computer unit stores data in a database representative of the signal generated by the on-site motor sensor;
• an off-site motor control center having a remote sensor measuring motor performance from a location remote from the motor site, wherein the remote sensor generates a signal representative of a second motor condition;
• an off-site motor control center computer unit electronically connected to the off-site motor control center and processing the signal representative of the second motor condition, wherein the off-site motor control center computer unit stores data in the database that is representative of the signals generated by the sensor at the off-site motor control center;
• wherein the on-site motor computer unit and the off-site motor control center computer unit synchronize the signal representative of a second motor condition with the signal representative of the first motor condition.

A method for determining torque in a rotating electrical motor having a dynamic electrical sensor comprising the steps of:

• a. sensing with the electrical sensor an alternating current waveform and an alternating voltage waveform being applied to drive the motor;
• b. generating a voltage phasor based on a signal generated by the sensor in step (a);
• c. determining a flux linkage phasor based on the voltage phasor and a frequency of the alternating voltage;
• d. generating an alternating flux linkage waveform based on a flux linkage phasor generated in step (c);
• e. determining dynamic torque from a cross-product of the alternating flux linkage waveform and alternating current waveform.