First of all, let's take a brief look at the working principle of the double-conversion water tank type wire drawing machine. The main pull inverter actually only plays a simple speed regulation role, and needs a large enough torque when starting up. Normally, the operating frequency of the main pull and take-up frequency converter can be calculated according to the winding speed of the process. In comparison, the take-up frequency converter can be wound in two different control modes.
One of them is the use of torque control, and the other is controlled by PID adjustment. Generally speaking, the diameter of the reel reached at the beginning of winding is small, and the rotation speed is required. At this time, the frequency of the inverter should exceed the frequency of the winding speed, so as to meet the rotation speed during winding. For the water tank type wire drawing machine, the main pull motor and the take-up motor are controlled by two inverters respectively.
Under normal circumstances, for the water tank type wire drawing machine, the frequency converter for the main drawing motor uses the communication given requirements to adjust the rotation speed. When the winding diameter of the take-up reel becomes larger, its winding line The speed frequency also decreases. In addition, the process mainly includes three processes of paying, drawing and winding. The way of releasing the line is a free way to release the line.
In the drawing process of the water tank type wire drawing machine, we use a power vector control inverter to drive an asynchronous motor of the same power; when the line is taken up, it is a small power. The special vector control inverter of the water tank type drawing machine drives an asynchronous motor with power.