Specifications MQ80
The asynchronous motors MQ series have been specially engineered to achieve reduced dimensions, high performances in variable speed applications with flux vector type controllers. They
were born due the great experience of two important companies in the field of industrial automation: Magnetic Motors e SicmeMotori. The main feature is in the laminated stator pack which
carries out the functions of the frame and integrates the air circulation system. In particular,
these motors, even though they are sensibly more compact, make it possible to achieve very
high specific powers with regard to a standard motor with the same shaft height. 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.
Features MQ80
They are three-phases asynchronous motors with squirrel-cage, low losses laminated sheet
with square frame visible from external of motor, a compact structure indipendent electrofan to
obtain the following characteristics:
- High power with relation to the external size
- Small external dimensions
- High rotation speed (up to 8000 rpm)
- Maximum and continuous torque are available even at low speed
- Small moment of inertia of the rotor
- Degrees of protection IP54 and IP23
- Dimensional and power comparability with direct current motors.
- Ventilation and speed transducer incorporated in the motor structure
- High mechanical robustness
- High precision of rotation speed
- Insulation class F (CEI EN60034-1)
They are available with with 12 different shaft height (frame size 80-100-132-160-180-225-
280-355-400-450-500 mm) with power ranging from 0,8 to 3600kW. In addition the MQ
motors can also be manufactured with larger shaft height sizes on customer’s request.
Standard mechanical protection degree available are: closed solution in IP 54 and an open
solution in IP 23. Other solution upon request.
The cooling of the motor is provided by an axial or radial electric fan, mounted in the rear of the
motor (no drive end side of coupling).
Motors frames 315-500 mm and upper are available with air-water IC86W or air-air exchanger
IC666.
All standard selection of accessories or on request, include more common thermal protection
detector (PTC, PT100, KLIXON etc).
As an option, motors frames 100÷280 mm can be equipped with a parking brake.
The whole series is dimensioned in F class; during CEI S1 service the max. overtemperature
allowed is therefore 105°C. Notwithstanding this, in order to increase the machine reliability,
almost all the insulating materials are in class H (Δt max 125°C, absolute max. foreseen
temperature 180°C). The impregnation is always made under vacuum to guarantee the resin
penetration.
The winding is made of copper foreseen with special enamel to resist to the peaks generated
by the inverter (high voltage variations, dv/dt). In any case it is advisable to contain the PWM
frequency and to check that there are no refraction phenomenons on very long power supply
cables (high voltage peaks and dv/dt) considering the opportunity of using suitable solutions (for
example to insert filters or chokes between inverter output and motor armature
