"三相电机启动方法理论研究及应用技术"

Three-phase motors are widely used in industrial applications due to their high efficiency and reliability. The traditional method of starting a three-phase motor is known as Direct Online (DOL) starting, where all three phases are connected directly to the power supply at full voltage. This method is simple and cost-effective, but it can cause high starting currents and mechanical stress on the motor. To address these issues, a more sophisticated method of starting three-phase motors has been developed. In a recent patent application publication (US 2017/0093314 A1), a method of starting a three-phase motor and motor driver using the same is described. The inventors, Michiel Esvelt and Robert Filusch, propose a method that involves gradually increasing the voltage supplied to the motor during the starting process. This allows for a smooth and controlled acceleration of the motor, reducing the risk of high starting currents and mechanical stress. The method described in the patent application involves a motor driver that is capable of adjusting the voltage supplied to the motor based on certain parameters, such as motor speed or torque. By monitoring these parameters and adjusting the voltage accordingly, the motor can be started in a more controlled manner, leading to improved efficiency and reliability. Overall, the method described in the patent application offers a more advanced and efficient way of starting three-phase motors compared to traditional methods like DOL starting. By gradually increasing the voltage supplied to the motor and controlling the acceleration process, the risk of high starting currents and mechanical stress is reduced, leading to better performance and longer motor life. This innovation could have significant implications for industrial applications where three-phase motors are commonly used.