Main drive motors, frameless design, air-cooled

Exemplary design

UHMF series

Brief description

The UHMF series of motor includes forced ventilated AC asynchronous motors with squirrel-cage rotor.

Due to the design without housing (solid plate) and the application of special qualities of plate, the motors are particularly compact and powerful.

Application

The motors are used et al. as dynamic lifting motors for tower cranes, main drives in metal machining machines and test benches for the automobile industry.

Specifications

  • Shaft height: 100 to 400 mm
  • Power: up to 600 kW
  • Speed range: up to 12.000 rpm
  • Duty cycle: S1 (continuous operation)
  • Cooling: IC 416 (forced-ventilation)
  • Voltage: 360V
  • Insulation class: F
  • Mounting: IM B35
  • Degree of protection: IP 54
  • Vibration severity grade: A
  • Ambient temperature: -20 to 40 °C
  • Installation altitude: up to 1.000 m

Details of standard design

  • Inverter operation
  • External fan axial assembled
  • Winding temperature monitoring by PTC resistor or Pt100
  • Speed sensor ROD 436, 1024 pulse
  • Shaft made from C-45
  • Balancing without key
  • Lifetime lubricated rolling bearings
  • Primer RAL 7031

Options of electrical design

  • Increased rated power for short term operation or intermittent operation
  • With external fan mounted radial or with tube connection
  • Dimensioning as 2, 4 or 6- pole motors
  • Special voltages and -frequencies
  • Insulation class H
  • Higher ambient temperature and installation altitude over 1.000 m
  • Anti-condensation heating

Options of mechanical design

  • Other mountings acc. to IEC 60034-7
  • Manuel or automatic regreasing device
  • Backlash-free or special high speed spindle bearings
  • Special bearings for high radial and axial loads
  • Electrically insulated bearings
  • Special-shield-material
  • Protection class up to IP 55
  • Vibration severity grade: B
  • Humidity- and tropic proofing
  • Different lacquer qualities , RAL- color at customers option

Options of built-on components

  • Holding brake or working brake
  • Optical or magnetic speed sensors
  • Clamp hub for assembling a torque meter
  • Sensors for vibration control
  • Earth brush at the shaft

Options of certificates, special approvals, e.g.

  • GOST
  • Germanischer Lloyd
  • Diverse company Standards
  • etc.

Example: motor UHMF 180.5-4

  • Voltage: 360 / 432 V
  • Power: 75 kW S3-60 % (intermittent operation)
  • Speed: 1.500 / 1.800 rpm up tp max. 6.000 rpm
  • Shaft height: 180 mm
  • Application: hoist motors for tower cranes

Application-specific technical details

  • Dimensioned for special voltages
  • Increased power for intermittent operation S3 – 60% / S3 – 35 %
  • Special bearings for high maximum speed
  • Rain shield DE
  • Degree of protection IP 44
  • Manuel regreasing device