MITSUBISHI

This is the Mitsubishi SF-JR series three-phase asynchronous steel plate induction motor (with horizontal base mounting version)

Mitsubishi SF-JR Motor Real Photo
Model Naming Rules
SF: Standard Industrial Three-phase Asynchronous Motor Series Code of Mitsubishi
JR: High-efficiency General Steel Shell Model, IP44 Protection, Suitable for Ordinary Industrial Environments
Complete Model Examples: SF-JR 5.5kW 4P (5.5 kilowatts, 4 poles, 1500 rpm), SF-JR 7.5kW 2P, etc.
Suffix Differentiation:
No suffix: Standard Horizontal Bottom Bracket Installation (as shown in the picture)
FB: Flange Vertical Installation
CB: With Brake Braking Motor
II. Core Functions and Features
Basic Function
Convert three-phase alternating current into constant-speed rotating power, output stable torque, and be used in continuous constant-speed drive with reducers, fans, pumps, conveying equipment, etc., different from high-precision servo motors, featuring low cost and long-term continuous operation.
Main Application Scenarios
Fluid Equipment
Industrial water pumps, cooling circulation pumps, fans, blowers, dust removal fans, cooling tower fans;
Conveying Lines
Pneumatic conveyors, roller conveyor lines, roller tracks, main drives of lifting platforms;
General Processing Machinery
Lathe, milling machine, grinding machine, drill machine main shaft drives, sanding machines, polishing machines;
Packaging and Light Industry Equipment
Mixers, mixers, extruders auxiliary machines, conveyor belts, simple winding equipment;
HVAC and Factory Building Accessories
Air conditioning outdoor unit fans, workshop ventilation, dust removal systems, water supply constant pressure pumps;
Matching Reducer Motors
Combined with gear reducers, cycloidal reducers, achieving low-speed high-torque transmission.
III. Core Product Features
Steel Shell Lightweight, Integrated Heat Dissipation Ribs Casting, Good Heat Dissipation, Low Temperature Rise, capable of 24-hour continuous operation;
Protection Grade IP44, Dustproof, Splash-proof, suitable for ordinary workshops, warehouses;
Voltage Adaptation: Three-phase 220V/380V, Domestic Industrial 380V Common;
Pole Number Selectable 2P/4P/6P/8P, Corresponding to Different Rotations (2P ≈ 2900 rpm, 4P ≈ 1450 rpm);
Optional Accessories: Electromagnetic Brakes, Specialized Frequency Conversion Models (SF-JRV), Flange Installation, Anti-damage Plates;
Stable Operation, Low Fault Rate, Simple Maintenance, Cost Far Lower than Servo Motors, Suitable for Constant Speed Conditions without Precise Positioning.
IV. Differences from Servo Motors
SF-JR Asynchronous Motors only perform constant-speed drive, unable to achieve precise positioning, multi-axis synchronization;
Servo Motors are used for point control, multi-axis linkage;
SF-JR is often combined with frequency converters to achieve simple speed adjustment, servo relies on dedicated drivers for closed-loop control.