The field winding is driven in series with the armature winding and the field strength will vary with changes in the armature current. If your speed is reduced by a load, the series engine will develop more torque. Its starting torque is higher than those of other types of direct current electric motors.
The field winding is driven in parallel with that of the armature and the field strength is considered independent of the armature current. Shunt-type motor speed only depends on changes in load and starting torque is lower than other types of DC motors T2535173S.
It is used in cases where it is desired to have a constant speed for a variable load, being possible to start the engine with a very light load or without load. This type of motor is widely used in speed control system in the independent excitation configuration, thus, the field winding is driven in series with the armature and another in parallel.
The electric squirrel cage type motor is the most used in the industry today. They have many advantages, among them, it is possible to emphasize the lowest cost, when compared to single-phase motors, and not only in their construction, but also in their use. It is important to note that in choosing the ideal start-up method, this engine will present a much wider range of applications.
The squirrel cage rotor basically consists of a core of ferromagnetic sheets, which are isolated from each other, in which are placed some aluminum bars, arranged parallel to each other, and joined at their ends by two conducting rings.
The motor stator is also formed by a ferromagnetic core laminated in its cavities, in which are placed the windings fed by the network of three-phase alternating current.
The main advantage of this rotor that can be emphasized is with reference to the coiled rotor MVM5450c, which results in that the construction of the armature is faster, more practical and economical. The conductor bars of the cage are generally inserted with a necessary inclination so as to avoid the vibrations and noises which may result in the electromagnetic action between the teeth of the stator and rotor cavities.