Continuous casting mold electromagnetic stirring (EMS) as an effective means to improve the quality of continuous casting billet is widely used in modern continuous casting machines. Due to the use of a rotating magnetic field inside the mold, the molten steel rotates horizontally through the steel The liquid rotation separates the lighter oxide inclusions and bubbles from the heavier molten steel and promotes its floating; secondly, the internal quality of the continuous casting is improved, and the molten steel is forced to flow during the solidification process by stirring, and the molten steel is superheated It is extremely important to quickly reduce, thereby expanding the production of high-carbon steels such as heavy rails and harder wires. In the system operation, the magnetic induction intensity begins to appear at 0100103T, and the effect above 0104T is better, but too large will cause negative segregation (white bright band), so the maximum magnetic induction intensity should be controlled below 0108T, and the stirring frequency is generally below 10kHz, usually 2kHz .
The control principle of the electromagnetic stirrer is: after the stirring frequency setting and current setting are calculated by the controller, it is transmitted to the communication module of the converter. The converter has a current regulator and a loopless logic controller. According to the controller ’s Given a signal, the converter output current generates a magnetic field. The current regulator calculates the trigger angle of the inverse cosine. The system has grid voltage adaptation and regulator parameter adaptation, which greatly improves the control performance. The process machine gives the continuous casting PLC the mixing model number. The PLC automatically controls the furnace model number. The logic controller in the converter accepts the PLC's instructions to control the operation of the converter. The stirring current and stirring frequency are manually set on the MMI, and the stirring mode is set by the process machine and MMI, respectively.
Features and Benefits of 3 Phase Filter:
It is suitable for 3 phase 3 line power supply.
This kind of Power Noise Filter has a compact structure and the installation is simple and time-saving, especially suitable for applications with limited space, as well highly cost effective.
FT310 series 3 Phase FRF filters are one-stage common mode general purpose 3 phase 3 line filters.
Excellent common and differential mode filtering effect for interference from 150KHz to 30MHz.
520VAC or 690VAC high voltage versions optional.
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