Siemens S120 configurationmanual Boundary conditions, Rated data, Limit data

Technical data and characteristics

14.1 Explanations of the formula abbreviations

Boundary conditions

UZK

TVORL

TN

Converter DC link voltage (direct voltage value).

Comment: For converter output voltages Uamax: see "System requirements".

Maximum intake temperature of the water cooler for the main cooler and precision cooler if the motor is to be utilized up to its rated torque MN. For details of the dependency of the continuous motor current on intake temperature of the water cooler, see the characteristic curve in "Cooling".

Rated temperature of the motor winding.

Rated data

MN

IN

nMAX,MN PV,N

Rated torque of the motor.

Rated motor current at the rated torque MN

Maximum speed up to which the motor can deliver the rated torque MN.

Power loss of the motor at the rated point (MN,nMAX,MN) at the rated temperature TN.

Limit data

MMAX

IMAX

PEL,MAX

Maximum motor torque.

Maximum motor current at maximum torque MMAX. Maximum possible load duration: see "Short-time duty S2".

Electric power input of the motor at point (MMAX,nMAX,MMAX) at rated temperature TN.

Note

The sum of the mechanical output Pmech and the power loss PV equals the electric power input of the motor PEL.

See also "Calculating the required infeed power".

The electrical rated power of the motor at the rated point with M = MN and n = nMAX,MN can be calculated as follows:

PEL,N = Pmech,N + PV,N = 2π ∙ MN ∙ nMAX,MN + 3 ∙ R130 ∙ I02

Frictional and eddy current losses are taken into account by using the larger current I0 in the calculation instead of IN.

176	1FW6 Built-in torque motors
	Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3