Bonfiglioli asynchronous motors

BX heavy Duty series

The principle of BX Heavy Duty operation is laid down in its name (not synchronous). In other words, the stator and rotor create magnetic fields that rotate at different frequencies when switched on. The frequency of rotation of the magnetic field of the rotor is always less than the frequency of rotation of the magnetic field of the stator.

To visualize this process more clearly, take a permanent magnet and spin it around its axis near the copper disk. The disk with a small lag will start to rotate after the magnet. The fact is that when the magnet rotates in the disk structure, Foucault currents (induction currents) are excited, moving in a closed circle. In fact, they are short-circuit currents that heat up the metal. The disk "generates" its own magnetic field, which further interacts with the field of the magnet.

Characteristics:

• Degree of dust and moisture protection: IP55.
• Available voltages as standard: 400/690-50 Hz, 380/660-50 Hz, 460-60 Hz, 440/760 - 60 Hz.
• Power range: 30-355 kW.
• Mounting options: IM B3, IM B5, IM B35.

BX, BE and BN series

Asynchronous motors of the BX, BE and BN series with aluminum frames are available in efficiency classes IE1 (BN / M) IE2 (BE / ME) and IE3 (BX / MX) and comply with the international standard IEC 60034-30. Bonfiglioli electric motors offer several options: dust protection class up to IP 56, tropical, anti-corrosion paint and anti-condensation heaters. The BN / M and BX / MX series engines are also available in the BrakeMotor version with a choice of AC or DC brakes. All of them can be controlled by inverters.

An asynchronous electric motor, in turn, differs from a synchronous one. If you remember the picture in the frame, and the frame is just short-circuited, then when the magnet rotates around the frame, the current induced in the frame will create a magnetic field of the frame, and the frame will strive to catch up with the magnet.

In an asynchronous electric motor, a rotating magnetic field is formed by the alternating current of the stator winding located in its grooves. The rotor of a typical asynchronous motor does not have windings as such, instead it has short-connected rods (a "squirrel cage" type rotor), such a rotor is called a short-circuited rotor. There are also asynchronous motors with a phase rotor, where the rotor contains windings, the resistance and current in which can be adjusted by a rheostat.

The frequency of rotation of the frame under mechanical load will always be less than the frequency of rotation of the magnet, and the frequency will therefore not be synchronous. This simple example demonstrates the principle of operation of an asynchronous electric motor.

Technical features:

• Degree of dust and moisture protection: IP55, for brake motors-IP54.
• Available voltages: 50 Hz, 230/400, 290/500, 400/690, 290/500, @ 60 Hz, 230/460, 330/575, 265/460, 460/800.
• Power range: 0.75 ... 22 kW; 0.06 ... 30kW.
• Mounting options: IM B3, IM B5, IM B14.

BS series

The BS series single-phase motors are manufactured in accordance with IEC standards.

Technical features:

• Degree of dust and moisture protection: IP55.
• Power range: 0.06 ... 1.5 kW.
• Mounting options: B5, B14.