Low-noise and high-efficiency control system and control method for underwater propulsion motor

• Main Authors: ZHANG XIAOFEI, SUN WEI, HU ZHIQIANG, LIU TIEFA, WANG CHAO, WANG XING
• Format: Patent
• Language: Chinese; English
• Published: 27.10.2023
• 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 relates to the technical field of motor control, in particular to a method for suppressing low-order harmonic torque and high-frequency harmonic current of an underwater propulsion motor for application occasions with low-vibration and high-efficiency requirements of the underwater propulsion motor. The control modes are switched along with the operation frequency change of the motor, so that the requirement of low noise during low-speed navigation is met, and the efficiency of the controller during high-speed navigation is improved. When the underwater propulsion motor runs at a low speed, low-order harmonics generated by a motor body and a controller are suppressed by performing harmonic compensation on a line current, so that electromagnetic force pulsation generated by the harmonics is reduced, the switching frequency is greatly improved through a silicon carbide power device, phase voltage distortion generated by a pulse width modulation technology is suppressed, and the reliability of the