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MITSUBISHI FREQROL Servo Drive
Brand: MITSUBISHI -
Cat: Servo Drive
Code:FR-SGJ-2-7.5K
| Combination name | Availability | Price |
|---|---|---|
FREQROL Variable Frequency Drive 7.5 kW – MITSUBISHI FR-SGJ-2-7.5K
The FR-SGJ-2-7.5K is a variable frequency drive (“AC Inverter Drive”) from the FREQROL SGJ series manufactured by Mitsubishi Electric, rated at 7.5 kW in the 200 V three-phase voltage class. Documented for use on CNC machine tools and industrial automation systems requiring variable-speed control of three-phase AC motors. The manufacturer’s part number encodes the series (“SGJ”), the voltage class (“2” = 200 V), and the power rating (“7.5K” = 7.5 kW). This product belongs to the legacy generation of Mitsubishi Electric’s FREQROL line, predecessor to the current FR-A, FR-F and FR-E series.
The variable frequency drive controls the speed of a three-phase AC motor by continuously modulating the output frequency and voltage according to the reference signal from the CNC or machine PLC. On a machining centre or CNC lathe it typically governs the spindle or auxiliary axes, providing controlled acceleration and deceleration, constant torque across the full speed range, and protection of the motor against overcurrent and overheating. A drive failure causes the immediate stop of the affected motor, rendering the machine completely inoperable until the unit is replaced or repaired.
Mitsubishi Electric is one of the world’s leading manufacturers of industrial automation, motion control and electric drives. The FREQROL® line has been active since 1965 as one of the first industrial variable-frequency drive series for AC motors, spanning dozens of product families over the decades. All products in the FR-SGJ family are legacy / discontinued: available exclusively as used, NOS (new old stock), or through specialist repair centres.
Main Technical Specifications
| Type | AC Variable Frequency Drive (Inverter Drive) |
| Part number | FR-SGJ-2-7.5K (FRSGJ275K) |
| Brand | Mitsubishi Electric – FREQROL series |
| Known application | CNC machine tools, machining centres, lathes, industrial automation with variable-speed three-phase AC motors |
| Function | Three-phase AC motor speed control via V/f modulation and output frequency regulation |
| Rated output power | 7.5 kW |
| Input voltage | Three-phase 200–220 V AC, 50/60 Hz (200 V class) |
| Output voltage | Three-phase 0–200 V variable |
| Output frequency | 0–400 Hz |
| Rated output current | ~34–40 A |
| Interfaces / connectors | Power and control terminal strips; analogue speed reference ±10 V; digital inputs/outputs |
| Weight | ~4–8 kg |
| Dimensions | ~250–350 mm × 200–300 mm × 130–200 mm |
| Production status | Legacy / discontinued — used / NOS / repair only |
