Motor drive and method for monitoring operational measurement data of a electric motor having at least one operating point

A method for monitoring operational measurement data of an electric motor having at least one operating point, the method comprising the following steps:

• acquiring initial measurement data for the at least one of the operating point of the electric motor using a motor drive;
• receiving an operating point signal indicating the operating point of the electric motor;
• determining a baseline from the initial measurement data for each operating point;
• generating at least one threshold level for the determined baseline;
• wherein the at least one threshold level defines a level of deviation from the determined baseline;
• and
• providing the at least one threshold level resulting in conditions for monitoring the operational measurement data of the electric motor;
• wherein the motor drive comprises:
• a measurement unit for acquiring initial measurement data for at least one of the operating points of the at least one operating point of the electric motor, wherein the initial measurement data comprises sensor data and/or estimated data;
• a processing unit for determining a baseline from the initial measurement data for the at least one operating point;
• an output unit;
• wherein the processing unit is configured to generate at least one threshold level for the at least one determined baseline, while the electric motor is in an on state or an off state;
• wherein the at least one threshold level defines a level of deviation from the determined baseline,
• wherein the output unit is configured to provide the at least one threshold level resulting in conditions for monitoring the operational measurement data of the electric motor,
• wherein the motor drive is configured to receive an incoming frequency from an input line and provide an output frequency to the electric motor via an output line, and
• wherein the motor drive is configured to drive the electric motor through the output frequency provided to the electric motor.

A motor drive for driving an electric motor and for monitoring operational measurement data of the electric motor, the motor drive comprising:

• a measurement unit for acquiring initial measurement data for at least one operating point of the electric motor, wherein the initial measurement data comprises sensor data and/or estimated data;
• a processing unit for determining a baseline from the initial measurement data for the at least one operating point;
• an output unit;
• and
• an enclosure;
• wherein the processing unit is configured to generate at least one threshold level for the at least one determined baseline independent of the electric motor being in an on state or an off state;
• wherein the at least one threshold level defines a level of deviation from the determined baseline;
• wherein the output unit is configured to provide the at least one threshold level resulting in conditions for monitoring the operational measurement data of the electric motor;
• wherein the motor drive is configured to receive an incoming frequency from an input line and provide an output frequency to the electric motor via an output line;
• wherein the motor drive is configured to drive the electric motor through the output frequency provided to the electric motor;
• and
• wherein the measurement unit, the processing unit, and the output unit are arranged within the enclosure, and the enclosure encloses motor drive elements that receive the incoming frequency from the input line and provide the output frequency to the electric motor via the output line in order to drive the electric motor.