The CIMR-G7A41P5 is part of Yaskawa’s Varispeed G7 family, a general‑purpose inverter series known for its unique 3‑level control architecture in low‑voltage drives. By generating output with three voltage levels instead of the traditional two, the G7 significantly reduces dv/dt and common‑mode voltage, helping to minimize motor insulation stress, bearing currents, electrical noise, and problems associated with long motor cables. This makes it an excellent choice for retrofit and new installations where motors are far from the drive or where sensitive equipment is nearby.
Rated 1.5 kW in the 400 V class, CIMR‑G7A41P5 is designed for three‑phase 380/400/415/440/460/480 V AC supplies and can control standard induction motors over a wide frequency range. It supports several control methods, including V/f (volts‑per‑hertz), open‑loop vector control, and vector control with PG (encoder feedback), providing high torque from low speed (e.g., up to 150% torque at very low frequency in vector modes) and precise speed and torque control. With a speed control range up to around 1:200 in open‑loop vector and up to 1:1000 with PG, the G7 can handle applications requiring accurate positioning, tension control, and smooth low‑speed operation.
Varispeed G7 drives include rich application features, such as dynamic and static auto‑tuning, multi‑step speed operation, S‑curve accel/decel, torque limit, slip compensation, DC injection braking, PID control with sleep function, energy‑saving control, and speed/torque control changeover. Communication capabilities include RS‑422/485 with MEMOBUS/Modbus protocol as standard, and a choice of fieldbus option cards to integrate with various PLC and DCS networks, enabling centralized system control and diagnostics. The design emphasizes easy maintenance with detachable terminals, a one‑touch cooling fan, and monitoring of accumulated run time and fan operating hours, simplifying service and predictive maintenance.
The G7 series is built for global use, with 200 V‑class (0.4–110 kW) and 400 V‑class (0.4–300 kW) ratings, and environmental specifications that cover typical industrial conditions. CIMR‑G7A41P5 is available in different enclosure styles (such as open chassis IP00 or NEMA 1) depending on configuration, and supports ambient temperatures typically from ‑10 to 45 °C for open chassis and up to about 40 °C for NEMA 1. Protective functions include over‑current, over‑voltage, under‑voltage, motor overload, and more, plus features such as momentary power‑loss ride‑through, speed search, and fault retry, helping keep production running in unstable power environments.
