These asynchronous motors have been specially engineered to achieve dimensions of dc motors of similar power and to be suitable for high performance, flux vector type controllers in variable speed applications. The distinctive electromagnetic and mechanical design permits operation in constant power mode at maximum speeds of up to 8000 RPM. The efficient stator cooling system uses an auxiliary electrofan to combine the benefits of reduced dimensions and high, continuous, low-speed torque capability.
The main characteristics are:
three-phase, 4 pole star winding with no access to neutral
squirrel-cage rotor
construction with low losses laminated sheet
square form, compact
high, top speed capability
thermal protection by thermostat embedded in stator winding
high overload capability
degrees of protection IP54 and IP23
insulation class F (CEI EN60034-1)
MA motors are manufactured in fully accordance with standard CEI EN 60034-1 and they comply with IEC 34-1, therefore in according with the rules of the principal European countries.