Asynchronous single-phase motor is a machine that converts electrical energy into mechanical, removes a torque on its shaft.It received its name because by increasing the load on the shaft its speed decreases, keeping up the speed of the magnetic field.The difference between these speeds is called the slip.
consists asynchronous single-phase motor, as well as all electric car, of two main parts - the stator and rotor.Inside the terminal box attached to the housing, the conclusions indicated differently.There are four, and to connect them correctly, you must understand the purpose of each of the two pairs of wires.
From the usual three-phase asynchronous electric motor single phase motor windings different number and configuration.Their are two and they are not the same.The main winding is designed to create a rotating magnetic field of elliptical shape.
at right angles with respect thereto is additional or auxiliary coil, generating the starting point, the right to give an initial rotor rotation.The need for this item due to the fact that one in the electric motor turned on by a magnetic field, the axis of symmetry of which is fixed, and therefore, to move from place rotor requires extra effort.Its shape is elliptical and can be represented as the sum of two circular fields with opposite directions, one of which promotes the rotation and the other lets it.The characteristics of such a machine for this reason, much worse than the three-phase, but in the conditions of the apartment or house to put up with this deficiency.
As a rule, single-phase induction motor - car low power, used mostly for domestic electric appliances.Examples include hair dryer, vacuum cleaner, coffee grinder or food processor.With the problem of this type of motors quite cope, especially as an alternative to them, virtually none.
Connection of single-phase induction motor has its own characteristics, due to the specifics of the structure.The fact that the starting winding is not designed for continuous operation.Running machines made in short-term operation.After dialing the working angular speed chain drive additional fields must be open, otherwise it will happen dangerous overheating and possible failure.The start time, usually no more than three to five seconds.The opening can be done manually (simply release the button "Start") or automatically (using the trip relay time).The most advanced devices are used centrifugal system, designed to disconnect the booster coil at a time when the single-phase induction motor to reach the rated speed.
addition auxiliary winding and the start button is another element necessary to make the single-phase induction motor to rotate.Wiring provides a serial connection to the inductance circuit provides a phase offset.Typically, this capacitor, during the passage through which the electric current vector changes direction with respect to the voltage vector.
