1FE1 built-in motors for SINAMICS S120 Siemens

Область применения

The SIMOTICS M-1FE1 built-in water-cooled synchronous motors are used in combination with the SINAMICS S120 drive system where there is a requirement for excellent machining quality, accuracy and running smoothness, and very short ramp-up times.

The SIMOTICS M-1FE1 built-in motors are offered in two main versions:

• High-Torque series
  6-pole/8-pole synchronous motors are available that have been developed for turning and grinding machines with moderate maximum speeds.
  These motors are characterized by an extremely high torque utilization. In this case, the speed range is approximately 1:2.
• High-Speed series
  In this series, 4-pole synchronous motors are available for milling. These motors are optimized for high maximum speeds and a speed range of over 1:4. A VPM Voltage Protection Module is required for these motors when they are operated up to the maximum speed.

Обзор

The  SIMOTICS M-1FE1 built-in motors are water-cooled, synchronous motors that are supplied as stator and rotor components. When the rotor has been mounted to the spindle in the spindle box, a complete spindle unit is created.

Дизайн

The SIMOTICS M-1FE1 built-in motor comprises:

• A laminated, permanently excited rotor, which, as an option, can be designed with a sleeve for simple mounting and removal.
• A wound stator core with cooling jacket and encapsulated winding overhang.
  • Free cable ends of 0.5 m/1.5 m (1.64 ft/4.92 ft)
  • Two integral PTC thermistors (incl. 1 spare), optionally with full or universal protection
  • A cooling jacket into which the stator has been inserted

Rotor with sleeve

Torque is transmitted to the spindle mechanically without play by means of a cylindrical stepped press fit. The rotor is mounted on the spindle by thermal shrinking.
The rotor with sleeve is pre-balanced and can be removed and subsequently remounted. The bond can be released by pressure- oil injection without affecting the joint surfaces.

Rotor without sleeve

Torque is transmitted to the spindle mechanically without play by means of a cylindrical stepped press fit. The rotor is mounted on the spindle by thermal shrinking.
Removal of the rotor is not possible with this type of mounting. Rotors without sleeves are not pre-balanced.

Характеристика

Comparison of synchronous/asynchronous spindle

Advantages of SIMOTICS M-1FE1 synchronous spindle over asynchronous spindle

Comparison of power/speed characteristics

Comparison of torque/speed characteristics

Power/speed and torque/speed characteristics of PE spindles compared to the asynchronous version under the following supplementary conditions: identical active part volume and identical rated current (60 A) of the power section.

Чертеж

Dimensions in mm (in)

Особенности

• Compact design (e.g. for turning machines and vertical milling machines) by dispensing with mechanical components, such as motor switch armature, belt drive, gearbox and spindle encoder
• High power density thanks to water cooling
• Maximum speed up to 40000 rpm, torque up to 820 Nm for S1 duty
• Higher torque - up to 60 % - with the same active component volume, consequently more compact machine design compared to SIMOTICS M-1PH2
• Extremely short ramp-up and braking times (50 %) thanks to higher torque compared to SIMOTICS M-1PH2
• Cold rotor due to excitation using permanent magnets, this means significantly less power loss in the rotor in the lower speed range and therefore less bearing heating and spindle expansion
• The stator and rotor are ready to install, no finishing is necessary.
• The absence of drive transverse forces permits extremely high accuracy on the work piece thanks to smooth, accurate spindle motion even at very low speeds.
• Larger rotor inner bore than squirrel-cage rotor of asynchronous motors, but with the same outer diameter, which is an advantage with regard to the bar capacity of automatic turning machines and results in higher spindle stiffness due to larger shaft diameters for milling spindles.
• Increased rigidity of the spindle drive achieved by mounting the motor components between the spindle main bearings
• Less cooling capacity required for the same power compared to SIMOTICS M-1PH2, i.e. greater efficiency
• Only one encoder (hollow-shaft measuring system) for sensing motor speed and spindle position
• Simple servicing by replacing complete motor spindles
• Compatible system of SINUMERIK – SINAMICS – motor, therefore fast commissioning is ensured
• Higher machine productivity:
  The permanent-magnet-excited motor spindles (PE spindles) increase the power density and economic efficiency of CNC machines. The optimized combination of SIMOTICS M-1FE1 built-in motor, drive control and CNC offers further opportunities for rationalization, such as lower workpiece machining times and fewer clamping faces.

Технические данные

Дальнейшая информация

Cooling principle

For design of the cooling units, see Planning Guide.

Cooling principle for 1FE1/1PH2 motors

For a list of heat exchanger manufacturers, please refer to Liquid cooling.