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Integrated drive system for open cooling circuits

17 November 2016

Based on its IDS concept, Siemens is offering an environmentally friendly integrated drive system for open circuits comprising Simotics FD motors and water-cooled Sinamics S120 converters.

Using an integrated cooling concept, the new system turns available service water into cooling water for the drive system, enabling a joint open cooling circuit for the plant, motor and converter. The joint cooling circuit allows the recooling module for the converter to be dispensed with, significantly reducing the amount of space required and providing improved economic and energy efficiency. Flexible drive trains can be created to address complex applications in fields such as the steel, automotive and process industries, as well as for offshore and shipping applications.

Water cooling is a highly effective method of dissipating heat generated by the motor and converter, and is particularly vital in the process industry. With its water-cooled drive system, Siemens is providing an efficient overall concept which makes minimal demands on the quality of the water. This means that any kind of available water, from service water customarily occurring in industry through to treated river water, can be used for drive system cooling.

Because the overall system is resistant to oxygen enrichment of the cooling water, it is also able to prevent unwanted oxidation. Dispensing with additives in the cooling water not only lessens the environmental impact of the drive system but also guarantees simpler commissioning and maintenance. Use of a copper-nickel alloy makes the drive system for open circuits particularly corrosion-proof, resistant to biological growth and consequently durable. The integrated cooling concept with water cooling of both motor and converter makes for more efficient heat dissipation, significantly reducing the need for costly air conditioning. The waste heat can additionally be put to good use, increasing the overall energy efficiency of the system and, depending on the application, opening up scope for regenerative feedback. The overall system with water cooling operates with the utmost reliability even in harsh environments due to the high protection ratings which can easily be implemented for both converter and motor.

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