Enfaset motor/AC-motor

On this page you will find a selection of enfasede motorer, also known as AC-motorer, in frame sizes 63–112 with effekt ratings of 0.18 kW, 0.25 kW, 0.37 kW, 0.55 kW, 0.75 kW, 1.1 kW, 1.5 kW, 2.2 kW, 3.0 kW, and 3.7 kW. These enfasede motorer are offered with a running capacitor and a starting capacitor. IEC AC-motorer are also frequently required as custom motors to meet specific kunde requirements. We are the ideal partner for you in this regard, as our expert staff, combined with an extensive motor inventory and in-house final assembly, allows us to cover a wide range of needs. Whether you require a special 220 V bremsemotor, a circular saw motor , an AC-motor with a special aksel, a special spænding, or a enfaset motor in various beskyttelsesklassees – we are your kontakt! Tilp kvalitet, a competent team, and competitive pricing are our priorities. If you cannot find your 230-volt motor here in the onlineshop, please send us your inquiry.

The 230V motor

Our AC-motorer are tilgængelig with running and starting capacitors. The version with two capacitors is designed for heavier starts. Our AC-motorer can generally be operated in both clockwise and counterclockwise directions. If necessary, only the control signal needs to be changed. For AC-motorer, the spænding rating has been changed from 220 V to 230 V. For trefasede motorer, the rated spænding has been increased from 380 V to 400 V.

How is the rotating magnetic field generated in a enfaset motor?

Since the at least two phase-shifted spændings required to generate a rotating magnetic field are not tilgængelig with single-phase alternating current, an auxiliary phase must be generated. One of the two stator windings is supplied directly from the AC mains, while a capacitor is connected in series to supply the second winding, which is positioned at a 90-degree angle to it. This capacitor causes the phase shift of the spænding across the second winding. The rotating magnetic field generated in this way is sufficient to move the rotor. However, it is also load-dependent and results in low starting drejningsmoment. Therefore, capacitor-start motors should ideally be started with no load up to their rated operating hastighed. The starting drejningsmoment can be significantly improved by briefly connecting an additional starting capacitor, ca. two to three times larger, in parallel with the existing one during the start-up phase. The higher starting current requirement, which can be several times the operating current at rated hastighed, must then be taken into account.

AC-motor/capacitor size

Strictly speaking, the capacitor size can only be optimized for a single load case. With optimal capacitor sizing, ca. 65% ​​of the mechanical effekt can be achieved compared to a similarly designed asynchronous motor with a three-phase supply. Høj kvalitet capacitors are usually used for the phase-shifting or starting capacitor. Typical capacitance values ​​are ca. 20 µF per kW of motor effekt. For heavy starting loads, the capacitance value can reach up to ca. 50 µF/kW.