Equivalent model establishment method suitable for permanent magnet synchronous motor

• Main Authors: ZHANG CHENGNING, GONG ZHENJIE, BA XIN
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides an equivalent model establishment method suitable for a permanent magnet synchronous motor, which comprises the following steps: considering the influence of mechanical loss on a model in modeling, and adopting an equivalent resistor Rmamp; co is used for representing the sum of mechanical loss and iron core loss during no-load operation of the permanent magnet synchronous motor, meanwhile, equivalent resistance Rci is used for representing iron core loss caused by winding current during load operation of the permanent magnet synchronous motor, and the defect caused by neglect of mechanical loss and magnetic saturation effect in modeling of an existing permanent magnet synchronous motor is overcome. When the method is practically applied to modeling, the equivalent resistance is Rmmp; co and Rci not only can be set as fixed values, but also can be set as equivalent resistance Rmamp; and co is set as a function of the rotating speed of the motor, or the equivalent resistance Rci is set a