Single-phase motors are double-strand asynchronous motors
manufactured with a gray cast iron housing and of the same mechanical
design layout as the rugged IEC standardized motor series. These
motors are thus available in a wide range of variants, and can be
operated on the single-phase alternating voltage network.
The following variants are available:
EB21R / EB20R type series
Single-phase asynchronous motors with an operating capacitor
The starting torque of approx. 0.4 MN is adequate for most cases of
operation (such as fan drives, for example)
EB21RW / EB20RW type series
Single-phase asynchronous motors with an operating capacitor and a
resistance rotor
Here, as compared to the EB21R / EB20R type series, the relative
Starting torque MA/ MN is increased to about double the value (for use
as a concrete mixer drive, for example)
ED21R / ED20R type series
Single-phase asynchronous motors with an operating capacitor and a resistance rotor
starting capacitor
This modification combines the benefits of the motors with an
operating capacitor (high output and level of efficiency) with the
benefits of the starting capacitor motors (high starting torque) and is
thus also suited for use with drives for larger resistive torques (such as
pump start-up versus delivery pressure, compressors, lifts). The
starting capacitor is deactivated via an electronic cut-out device.