Variable-Speed Motor Control for Resin Extruder Start-Up

The patent applies preliminary action by implementing a start-up phase with controlled low flow rate before transitioning to normal operation. During this preliminary phase, the resin flow rate is deliberately kept low to prevent excessive temperature increase and shear force, allowing the system to stabilize before full productivity is engaged. This resolves the contradiction by preparing the system in advance rather than immediately operating at full capacity.

The patent applies dynamics by making the resin flow rate variable rather than fixed. The flow rate dynamically transitions from a low start-up level to a high normal operation level based on system conditions. This dynamic adjustment allows the system to adapt to different operational phases, maintaining resin quality during start-up while achieving high productivity during normal operation.

The patent applies universality by making the single electric motor capable of performing multiple functions: it operates at low speed during start-up to maintain resin quality, and at high speed during normal operation to achieve high productivity. The motor controller enables the same motor to adapt to different operational requirements, eliminating the need for separate motors and reducing device complexity.

The patent applies parameter changes by varying the operating parameters (rotation speed, power output) of the electric motor based on the operational phase. During start-up, the motor operates at low speed with reduced power output; during normal operation, it operates at high speed with full power output. This parameter adjustment allows a single motor to replace what would traditionally require multiple motors.

The patent applies preliminary action by implementing a controlled start-up phase with low resin flow rate before transitioning to normal operation. This preliminary low-flow phase prevents excessive resin discharge and associated environmental harm while still allowing the system to become operational. The flow rate is deliberately kept low during this initial phase to minimize environmental impact.

The patent applies dynamics by making the resin flow rate variable, transitioning from low during start-up to high during normal operation. This dynamic control ensures that resin discharge is minimized during the start-up phase when environmental harm would be most significant, while still achieving high productivity during normal operation when the system is fully stabilized.