这是西门子官方的说明，以电机S1来看，我们的应用有点问题了。
In typical applications with vector control (with or without speed encoder), the rated motor current should equal at
least 25 % of the rated current of the converter or Motor Module. The greater the difference between the rated
currents of motor and converter, the less accurate will be the actual current sensing circuit and the lower the quality
of the vector control. For applications with very high control requirements which use a speed encoder and demand a
very accurate vector control, it is advisable to select a motor rated current which equals at least 50 % of the rated
current of the converter or Motor Module.

No restrictions of this type apply in principle to V/f control mode, i.e. motors with very low rated currents can be
operated on the converter. It must be noted, however, that when a single motor of very low output power is operated
on a very powerful converter, the very low currents make automatic motor identification impossible. For the same
reason, it is impossible to implement motor overload protection on the basis of a specifically adapted overcurrent limit
parameter setting in the converter.

Typical applications with V/f control mode and very low-output motors fed by powerful converters are roller conveyor
drives in which up to 100 small motors might be supplied by a single converter.