Справочник Пользователя для Siemens Outboard Motor S120

Configuring the motor

5.1 Procedure

Recalculating the duty cycle

If the moment of inertia initially assumed deviates significantly from the actual moment of

inertia, the duty cycle may have to be recalculated.

5.1.10

Selecting the drive system components for the power connection

The drive system components for the power connection are selected on the basis of the

peak and continuous currents that occur in the duty cycle. If more than one motor is

operated in parallel on a single power unit, the total values of the peak and continuous

currents must be taken into account.

Note
In systems where direct drives are used on controlled infeeds, electrical oscillations can

occur with respect to ground potential. These oscillations are, among other things, influenced

by:


The lengths of the cables



The rating of the infeed/regenerative feedback module



The number of axes



The size of the motor



The winding design of the motor



The type of line supply



The place of installation

The oscillations lead to increased voltage loads and may damage the main insulation! We

thus recommend using an HFD commutating reactor with damping resistance for damping

the oscillations. For specific details, refer to the documentation of the drive system being

used or contact your local Siemens office.

5.1.11

Calculating the required infeed power

Infeed power

The electrical infeed power of the motors can be determined from the mechanical power

delivered and the resulting electrical losses.

With

Here, M represents the motor torque in Nm, ω represents the angular velocity in 1/s, and k

represents the torque constant of the motor in Nm/A (see also "Explanations of the formula

abbreviations)".

1FW6 Built-in torque motors

Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3