Siemens 611 configurationmanual Cooling circuits, Effects when water cooling is not used

Motor components of the built-in motor and options 3.3 Cooling

Effects when water cooling is not used

If water cooling is not used, the motor can only be loaded in continuous operation (depending on the size, power loss, emissions area, convection, and installation conditions in the machine) with a significantly reduced continuous torque (M << MN). The max. torque MMAX of the motor can be fully utilized here.

WARNING

Without water cooling:

Significant reduction of continuous torque (depending on the thermal connection to the surrounding construction) and considerable rise in the temperature of the machine construction.

∙This is why a water-cooling system is essential.

∙In the case of axes that are to be operated without water cooling, the reduction of the continuous motor torque and the thermoelastic deformation of the machine construction (warping through expansion) must be taken into account in the drive configuration and design.

Note

Motors with integrated cooling should not be operated without water cooling.

3.3.1Cooling circuits

Cooling circuit requirements

We recommend that the cooling circuits be designed as closed systems, to prevent the growth of algae. The maximum permissible pressure is 10 bar.

Note

We do not recommend that the cooling circuits of machines are also used to cool the motors: Due to accumulated dirt and long-term deposits, blockage may result! This especially applies to cooling-lubricating medium circuits.

If the cooling circuits of the machines are also used to cool the motors, then they must fulfill all of the requirements listed here. Also note the demands on the cooling medium as well as the maximum standstill times of cooling circuits according to the specifications of the cooling medium manufacturer!

50	1FW6 Built-in torque motors
	Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7