Delta VFD220C43A-21 is a high-performance vector inverter from the C2000 series, engineered for precise and stable drive control in industrial applications with three-phase 380–460V input and 22kW rated output power. It adopts advanced closed-loop vector control technology (with encoder feedback) that delivers high overload capacity (180% for 10s, 150% for 60s), excellent dynamic response speed (<5ms), and precise speed/torque control (±0.05% speed accuracy), meeting the requirements of machine tools, conveyors, and other equipment requiring high-performance control. The inverter supports a wide speed regulation range (1:1000 for closed-loop control), stable low-speed operation (0.1Hz with 150% torque), and multiple control modes (V/F, sensorless vector, closed-loop vector) to adapt to different load characteristics. It is equipped with an intelligent cooling system (temperature-controlled fan speed), rich I/O terminals (16 DI, 6 DO, 4 AI, 2 AO), and multiple communication options (RS485, PROFIBUS, DeviceNet) for flexible system integration. Comprehensive protection functions include overcurrent, overvoltage, undervoltage, overload, overheating, phase loss, ground fault, short circuit, motor thermal protection, and power loss ride-through function, ensuring reliable operation in continuous heavy-duty working conditions.