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Hannover Fair 2015 exclusive show report

09 June, 2015

SEW has added IE3 efficiency versions to its DRN family of AC motors, launched in 2008. The IE3 machines, which cover ratings from 0.75–200kW, are the same size as the IE2 versions of the same rating, simplifying the stocking of spares and upgrading the efficiency of existing machines.

Siemens has now completed its Simotics FD family of modular LV motors with outputs from 200kW–1.6MW and shaft heights from 315–450mm. They are optimised for inverter operation and are said to be particularly efficient at part loads. Users can choose between air and water cooling, and forced or self-ventilation. The water-cooled versions offer power densities up to 30% higher than air-cooled versions.

Siemens has also applied the modular concept to HV motors with the new Simotics HV M range, which includes four- and six-pole variants with outputs up to 16MW at 10kV and 18MW at 6kV. The motors can be equipped with predictive condition monitoring and combined with MV converters to form integrated drive systems. Options include special paint finishes, Ex p and Ex n variants, and low-temperature and vibration-resistant versions.

A range of liquid-cooled inverter cabinets from Siemens avoids the need for air-conditioning and saves floorspace compared to air-cooled versions. The IP55-protected, sealed Sinamics S120 cabinet modules are designed for use in harsh conditions.

The Turkish motor manufacturer Volt Electric Motors launched a choice of two IE4 ranges: one based on a permanent magnet (PM) design; the other, on synchronous reluctance. The latter machines offer high efficiencies at part loads and operate at low temperatures, resulting in high reliability and low maintenance costs. The PM motors dissipate even less power and have a higher performance than asynchronous motors of the same size.

Volt was also showing special motors including a brushless PM AC fan motor with an output up to 750W, and a sensorless speed-controlled brushless PM fan motor with an output of up to 75W.

WEG launched a series of robust, efficient synchronous motors covering the power range 5–35MW on supplies up to 13.8kV, 50 or 60Hz. The four-pole SM40 motors (below) have solid salient-pole rotors with the shaft and rotor made from one piece of forged steel. The high-efficiency motors have been designed to eliminate the risk of pole shoes detaching. They offer high starting torques and low starting currents and can be used in hazardous areas.

WEG has also added an IEC 800 frame model to its W22X series of high-efficiency (up to 97.4%) MV and HV explosion-proof motors. The motor is available in 2, 4, 6 and 8-pole versions in ratings from 2–5.6MW for supply voltages from 6.6–11kV, 50 or 60Hz. A tubular stainless-steel cooling system optimises airflow to cool the stator, rotor and bearings.

Yaskawa was showing two ranges first shown at the SPS IPC Drives show last November. They are: the latest version of its matrix converter technology aimed at asynchronous and permanent magnet applications requiring efficient regeneration of braking energy; and a new generation of its Sigma servodrives and motors, including a 400V version for the European market.

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