220v single-phase motor control forward and reverse schematic diagram:?
1, with the inverted switch to control single-phase AC motor forward and reverse schematic diagram: will be connected in series with the capacitor of the winding of the wiring of the end adjusted to the other end of the power supply, change the direction of the rotating magnetic field of the motor can be realized.
2, centrifugal switch, running capacitor, start capacitor control forward and reverse principle: U1U2 for the motor main winding, V1V2 for the motor built-in centrifugal switch, Z1Z2 for the secondary winding. V1Z1 connected to the running capacitor (small), V2Z1 connected to the start capacitor (large).
Extended information:
Single-phase motors generally refer to low-power single-phase asynchronous motors powered by a single-phase alternating current (AC220V). These motors usually have two-phase windings on the stator and an ordinary squirrel-cage rotor. The distribution of the two-phase windings on the stator and the difference in power supply can produce different starting and operating characteristics.
Single-phase motor, refers to the 220V AC single-phase power supply and operation of asynchronous motors. Because 220V power supply is very convenient and economical, and family life with electricity are 220V, so single-phase motor not only in the production of a large amount, but also with people's daily life, closely related, especially with the people's living standards are increasingly improving, household electrical equipment, single-phase motor usage, but also more and more.
Applied in the production of micro-pumps, grinders, threshing machines, pulverizers, woodworking machinery, medical equipment, etc., in terms of life, there are fans, hair dryers, exhaust fans, washing machines, refrigerators, etc., there are more kinds of, but the power is smaller.
Theoretically, a single-phase motor can be started if measures are taken to make the AC current flowing in the two sets of windings have a certain phase difference. How to make the two space has been staggered at a certain angle between the magnetic potential or flux of a certain phase difference, which is the starting point for solving the starting problem. Accordingly, the single-phase AC asynchronous motor can be divided into two categories: split-phase and shaded-pole.
Split-phase single-phase motor
Split-phase single-phase motor using capacitor or resistor string inductive start winding to play the role of phase shifting, so that the start winding and the work of the winding current phase stagger, that is, the so-called "split-phase".
(1) capacitance split-phase single-phase motor
Since the capacitance of the phase-shifting effect is more obvious, as long as in the start winding stringing the appropriate capacity of capacitors (generally about 20 ~ 50μF), can make the two windings of the current phase difference is close to 90 °, the synthetic rotating field close to the rotating magnetic field of the circle, and thus the starting torque is large at the same time start-up current is smaller.
This type of single-phase motor is commonly used and can be retained (called a capacitor-run motor) or removed (called a capacitor-start motor, which is actuated by a centrifugal switch placed inside the motor) as required after starting. If it is necessary to change the steering of the motor, it is only necessary to set the outgoing end of either winding against the other, when the current phase relationship between the two windings is reversed.
(2) Resistance split-phase single-phase motor
This kind of motor starts with fewer turns in the winding and finer wires, which has less reactance and higher resistance compared with the running winding. Resistance split-phase start, the start winding current ahead of the run winding, synthetic magnetic field for the elliptic degree of elliptic rotating magnetic field, starting torque is small, only for no-load or light-load occasions, the application is less. Resistance split-phase single-phase motor start winding is generally designed for short-time operation, after starting by the centrifugal switch to remove the work winding to maintain operation.
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