Novel direct torque control method for permanent magnet synchronous motor

• Main Authors: ZHU LIBIN, CHEN ZAIFA, LAO SHAN
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2022
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a novel direct torque control method for a permanent magnet synchronous motor, and the method comprises the following steps: constructing a three-level direct matrix converter which completes the change of electric energy and the transmission of energy, and achieves the control of the torque and rotating speed of the permanent magnet synchronous motor; constructing modulation and control of the three-level direct matrix converter; novel direct torque control is introduced; the improved cascade spiral sliding mode control, the superspiral sliding mode direct torque control and the space vector pulse width modulation are combined to modulate the three-level direct matrix converter so as to realize the control of the rotating speed and the torque of the permanent magnet synchronous motor. More accurate control can be achieved when DTC is matched, the waveform smoothness is improved, conventional DTC is changed into novel DTC, the dynamic adjustment time of the rotating speed and torque of