Low-voltage motors in non-explosive environments for standard and special applications

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.

Features

Surface cooled (t.e.f.c.) – options

  • Regreasing system from FS 160 – SPM nipple from FS 132 – stainless steel screws / bolts – larger connection system
  • Additional terminal box from FS 132 – anti-condensation heating from FS 132 – condensation water drain from FS 132
  • PTC thermistor as the only protection (TMS) up to and including FS 250
  • PTC thermistor as additional protection (TMS)
  • Can also be supplied for 60 Hz (adapted winding – increased power rating)
  • All motors with insulating material class H
  • Flange and shaft end can be designed and implemented in accordance with NEMA
  • Special versions e.g. for: Forced ventilation (for converter operation), mounted speed encoder, non-standard shaft end, backstop, special paint finishes, low temperatures down to -60 °C
  • High-speed motors up to 12,000 rpm

Water cooled – options

  • SPM nipple – stainless steel screws / bolts – larger connection system
  • PTC thermistor recommended as additional protection (TMS)
  • Special mechanical design according to customer specifications
  • All motors with insulating material class H
  • All motors are available with an electrical design according to “NEMA Standards Publication No MG1”
  • Flanged motors can be designed and implemented with flange and shaft end in accordance with NEMA

Braking motor – options

  • All brakes (single disk, spring-operated) are designed for temperature class F
  • Higher braking torques, also motors with other pole numbers can be supplied
  • Can also be supplied with mounted fan for forced cooling and/or speed encoder
  • The air gap can be more easily adjusted for extremely high levels of wear
  • Special mechanical design according to customer specifications
  • Can also be supplied for 60 Hz (adapted winding – increased power rating)
  • All motors with insulating material class H
  • All motors are available with an electrical design according to “NEMA Standards Publication No MG1”
  • Flanged motors can be designed and implemented with flange and shaft end in accordance with NEMA
  • Full flexibility: Special demands are implemented => adapted to special requirements
  • Only quality components are used => for an extremely high degree of operational reliability and long lifetime
  • Parameter-optimized motors (adapted winding versions and rotors) => for extremely high efficiencies with the best power factors
  • Water cooling => smaller outer dimensions, increased power ratings, low moment of inertia, low noise
  • Braking motors => suitable for switching operation at high switching frequencies, constant brake activation and deactivation times and a long lifetime
  • Pumps
  • Compressors
  • Fans
  • Extruders
  • Can be universally used as drive for these applications
  • Tunnel drilling machine
  • Hoisting gear
  • Travel gear
  • Cranes

Customer benefits

  • Full flexibility: Special demands are implemented => adapted to special requirements
  • Only quality components are used => for an extremely high degree of operational reliability and long lifetime
  • Parameter-optimized motors (adapted winding versions and rotors) => for extremely high efficiencies with the best power factors
  • Water cooling => smaller outer dimensions, increased power ratings, low moment of inertia, low noise
  • Braking motors => suitable for switching operation at high switching frequencies, constant brake activation and deactivation times and a long lifetime

Typical areas of application

  • Pumps
  • Compressors
  • Fans
  • Extruders
  • Can be universally used as drive for these applications
  • Tunnel drilling machine
  • Hoisting gear
  • Travel gear
  • Cranes
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