Overview of log non card rotary cutting machine: the log rotates under the joint drive of two rotating center fixed rollers and one rotating center moving roller to produce rotary cutting power. The central support of the driving roller and the rotary cutter are relatively fixed, and the rotary cutter motor is controlled by the frequency converter to push forward, so that the rotary cutter will plane the thin plate from the log, and the thickness of the veneer is controlled by the gap between the moving roller and the rotary cutter edge and the driving speed of the rotary cutter motor. Therefore, it is particularly important to design a frequency conversion control system which can accurately control the moving speed of rotary cutter and control the thickness of rotary cutting plate. The basic idea of system design is: first, establish an accurate mathematical model; Then take over the original speed control system to achieve accurate speed control.
Application characteristics of dzb300b series frequency converter in rotary cutting machine:
1. Two speed control modes: no PG vector control (SVC) and V / F control mode;
2. Starting torque: no PG vector control: 0.5hz/150% (SVC);
3. The operation is smooth and the rotary cutting thickness is very uniform;
4. The acceleration and deceleration time shall be controlled reasonably to make the rotary cutter respond quickly and retract stably;
3.0.75 ~ 15kw built-in braking unit of various specifications, which is directly connected with braking resistance and can quickly switch forward and reverse;
4. Support multiple frequency setting modes: digital setting, analog setting, PID setting, communication setting, etc;
5. It has jump frequency control function to avoid mechanical resonance and make the system more stable and reliable;
6. Provide a variety of fault protection functions: overcurrent, overvoltage, undervoltage, overheating, phase loss, overload and other protection functions.
