Loher
Категория: Электродвигатели
Low-voltage motors in non-explosive environments for standard and special applications
Based on its well-proven standard platforms, Loher precisely adapts its motors to the specific project and with the highest degree of flexibility - regarding the mechanical design, electrical design as well as special monitoring equipment and cooling types. This results in quite individual drives, perfectly tailored to the particular plant or system, application or customer specifications. All parameters of the gray cast iron motors have been optimized, i.e. the winding and rotor are optimally adapted to the environmental conditions. Only then can the optimum values for efficiency and power factor be achieved (without derating). The result is reflected in the energy saving for the lowest load on the line supply. These motors are available in the following versions - surface-cooled (t.e.f.c.) - water cooled and as braking motor up to approx. 500 kW. In addition to the usual types of construction (where the shaft and flange is also in conformance with NEMA), special numbers of poles, pole-changing versions, high-speed designs as well as special cooling types are available - precisely to customer specifications. Our strengths also include special voltages / special frequencies / special insulation / converter operation. The versions with special bearing designs for extremely high radial or axial (thrust) forces are especially worth noting.
Категория: Loher motors in Non-Ex
Surface-cooled motors according to IEC and VIK up to frame size 355 and approx. 315 kW
The Loher Chemstar Motor is at home in the chemical and petrochemical industry. For low and medium power ratings, the Loher Chemstar series especially guarantees a maximum degree of safety, the highest level of availability and low operating costs. For power ratings up to 315 kW, this motor is the ideal drive component - as it fulfills all of the demands and requirements of the chemical and petrochemical industry. A sector-specific design takes into account the location - not only for hazardous zones (explosive areas) but also in non-hazardous zones. For instance, a high-quality paint finish and galvanized fan cowl protect against aggressive atmospheres. Anti-condensation heating is often no longer required even for extremely high air humidities. Loher Chemstar motors operate perfectly at temperatures from -55 °C up to +70 °C. These motors are even optimally suited for operation in desert and polar regions. When required, these motors can be equipped with corrosion-resistant stainless steel screws and bolts. Shaft seals in IP66 protect against water and dust. The degree of protection extends up to IP67. The enclosure is manufactured out of rugged gray cast iron and is therefore extremely resistant to corrosion, dampens vibration and has a high strength. Reinforced bearings and PTC thermistors - no problem. These adapted motors fulfill almost all user requirements and specifications.
Категория: Loher motors in Non-Ex
Vario series
The Vario Non-Ex series has a welded steel enclosure to ensure the highest degree of variability and versatility. Flange rings at the ends of the enclosure increase the torsional stiffness and ensure a vibration-proof mechanical design. The steel version allows various bearing concepts, dimensions can be adapted and a wide range of instruments can be mounted. The surface cooling using flat ribs combined with a defined inner cooling circuit with shaft-mounted fan inside the motor ensure optimum motor utilization. The copper bar rotors used as standard allow starting and operating parameters to be optimized for each and every application.
Категория: Loher motors in Non-Ex
J series
J series from Loher have a modular cooling design featuring double-flow inner cooling for a high power density and a homogeneous temperature distribution.2 versions are available: Mounted air-water heat exchanger (JNWA–... type for roller bearings / JNXA-... for sleeve bearings): Optimum cooling is guaranteed specifically for these series due to the harmonized and coordinated heat exchanger. The motor power loss is dissipated through the cooling water and is therefore de-coupled from the ambient temperature. The heat exchangers are available in a wide variety of versions with single and double pipe types. The high quality heat exchanger materials used are adapted to the specific requirements. Mounted air-air heat exchanger (type JNRA–... for roller bearings / JNQA-... for sleeve bearings): The motors are equipped with air-air heat exchangers. The cooling pipes are manufactured out of galvanized steel; stainless steel versions are available for especially aggressive atmospheres.
Категория: Loher motors in Non-Ex