Application of frequency conversion speed regulation technology in motor drag
Specifically, motor drag includes many aspects, such as the DC motor, the motion equation of the motor system, and the static characteristics, dynamic characteristics, and transformers of the DC motor. In terms of control category, the speed open loop is the variable frequency speed control system of the unloading pump motor, and the power frequency variable speed control system is controlled by the constant voltage frequency ratio. In actual use, to control the output DC voltage, the main reason is the voltage.
By the speed given, the control signal in the entire power system can be obtained, and even if the speed is given in the case of a jump change, the output voltage of the inverter and the regular change of the current can be coordinated and controlled. Therefore, we will set the given integrator and replace the jump input with the ramp output signal, so that the forward and reverse rotation of the motor can be effectively controlled. It is known through practice that the positive and negative voltages are used to effectively divide the speed reference and the given integrator output during the operation of the entire motor drag system. Since the positive signal voltage is the output voltage of the control current controller and the output frequency of the inverter, there is no significant difference in the absolute value of the set converter. Through a lot of practical research, the inverter system has a wide range of speed regulation, and has good speed regulation smoothness, which can effectively improve the performance of the motor when starting, so it can be effectively applied to the motor drag, in addition It can also be widely used in ship electric drag. The control signals used are the same, only need to coordinate the output voltage and output frequency, more rational cognitive frequency control technology, you can better apply the variable frequency speed control technology in the motor drag.
