Three Phase Wheel Drive Operation

The three-phase brake motor consists of an induction motor coupled to a single-disc brake, forming a robust and compact integral unit. The induction motor is fully enclosed and features external ventilation, with the same performance characteristics and sturdiness of the engine line. The brake motor is usually found in graphic machines, adjustment of rolling mill rollers, elevators, cranes, cranes, folding machines, winding machines, washing and bottling machines, packing machines and looms, among others.

The drive coil of the electromagnet is managed by a continuous current, generated by a bridge rectifier that counts on silicon diodes and varistors, that avoid peaks of tension, leaving that an interruption of the current takes place. The DC power supply allows more agility and uniformity of brake actuation. The brake is formed by few moving parts, which guarantee a long life with almost no maintenance.

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The double face of pellets forms a large surface of friction, which causes a reduced pressure on them, reduced heating and almost no wear. The brake is cooled by proper engine ventilation. The electromagnet drive coil, protected with epoxy resin, acts continuously with voltages of 10% below or above nominal.

Slippage

The sliding or sliding basically consists of the difference between the speed of the rotating field and the speed of the rotor. Slip has a direct influence on the frequency of induced electromotive force on the rotor bar. At the moment of starting the electric motor, that is, at the instant the rotor is stopped, the slip is maximum, so S is equal to and the frequency is equal to the supply voltage.

It should be noted that the rotor frequency varies according to the cutting speed of the rotating field force lines, and considering the fact that the sliding is directly proportional to this speed, it can be concluded that the rotor frequency is directly proportional To slipping.

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Thus, the value of the induced voltages in the rotor in the case of a coiled rotor depends exclusively on the ratio of coils between the rotor and the stator, so that the stator can be considered as the primary of a transformer and the rotor as its secondary.

This type of machine, when activated by a turbine and operating with a higher rotation than the synchronous one, can produce active power and thus deliver it to the system where it is connected, thus, starting to act as a generator.