CIMR-M5A27P5 belongs to discontinued Yaskawa VS-626M5 series dedicated spindle drive, specially designed for CNC machine tool spindle control. It is widely used as replacement spare part for legacy Japanese CNC lathes, machining centers and grinding machines since original production has been terminated.

CIMR is Yaskawa standard inverter prefix; M5 stands for VS-626M5 spindle dedicated series; A indicates standard analog control version; digit 2 refers to 200V DC bus input class; 7P5 means rated 7.5kW matching spindle motor.

This unit receives DC270V~325V bus power from matched MR5 rectifier module instead of AC mains input. It fits 7.5kW three-phase spindle motor with rated output current 31A, output adjustable three-phase voltage from 0 to 230V and maximum output frequency up to 400Hz for high-speed spindle operation. It supports open-loop and closed-loop vector control with encoder feedback interface, featuring 120% rated current overload capacity lasting for 60 seconds to satisfy heavy cutting load. Built-in brake chopper allows external braking resistor connection for rapid spindle stopping. Full protection functions include overcurrent, overvoltage, undervoltage, overheat, overload and output short-circuit protection.

Speed command can be given via 0~10V analog voltage, 4~20mA current signal or multi-step speed terminal switching. External encoder feedback port enables high-precision closed-loop speed regulation for precise machining performance.

Open frame structure with IP00 protection grade, forced air cooling by built-in cooling fan and only installed inside equipment control cabinet. Operating ambient temperature ranges from 0℃ to 50℃, relative humidity 20%~80% without condensation, applicable installation altitude below 1000 meters.

Mainly applied for spindle driving of old imported CNC machining centers, milling machines and grinders, used for equipment maintenance and overhaul replacement.