User Manual
Chapter 4 - Installation 21
Figure 4.2.2: Installation distances
10 mm ( 0.4" )
6"
150 mm (
)
2" )
50 mm (
20 mm ( 0.8" )
6"
150 mm (
)
10 mm ( 0.4" )
4.3. Motors
DVS drives are designed for open or closed loop control of standard asynchronous motors.
4.3.1. Asynchronous AC motors
FOR BEST RESULTS:
Choose an asynchronous motor with a minimum slip of 3-5 %, with a single cage rotor, designed for use with an
inverter.
a) Minimum motor size.
Nominal motor current must not be less than 30% of nominal drive current @ 230V.
b) General purpose motors
(i.e. motors not specifically designed for inverter control) must only be used if an additional
output choke
is fitted.
c)
We recommend that you use
special motors with reinforced insulation
designed for inverter control. Motors of this
type
do not require the drive to be fitted with an output choke.
The electrical and mechanical specifications of standard asynchronous motors refer to a specific functioning range. When
controlling motors of this type with an inverter, always bear the following points in mind.
Can standard asynchronous motors be used?
DVS series drives can be used with standard asynchronous motors. Certain characteristics of these motors, however, have
a major influence on performance. Pay special attention to the following considerations. Also bear in mind what section
3.3.4 Output has to say about motor power ratings and voltages.
Star or delta connection?
Motors can be wired up either in a star or a delta configuration. Star wired motors are generally easier to control and star wiring
is therefore to be preferred under most circumstances.
