Three-phase motors
Three-phase motors are generally understood to be electric motors that are built according to the generally applicable standards as asynchronous three-phase motors. The asynchronous motor is the most commonly used electric motor with outputs of up to several megawatts. A major advantage over brushed DC motors is the lack of brushes, as brushes wear out and create sparks. As a result, the line network can be disturbed with high-frequency vibrations. But not only the higher performance, but also the better synchronization, i.e. the constant power output at the shaft, is a great advantage of the three-phase motors.
The new generation of GEMOTEG three-phase motors in an aluminum housing are manufactured in accordance with our specifications and ISO 9001. They feature a multi-mounting aluminum housing; protection class IP55/ Iso F; a ZZ warehouse as well as the IEC standards and are suitable for frequency converter operation. Available with PTC thermistor sensor, PTO temperature bimetallic contact or external fan.
Our three-phase motors are built according to the following relevant standards:
Rotating electrical machines Efficiency classes IEC60034-30 Ratings and operational characteristics: IEC 60034-1 Degrees of protection: IEC 60034-5
Cooling method: IEC 60034-6
Designation for designs and installation: IEC 60034-7
Connection designation and sense of rotation: IEC 60034-8
Noise limits: IEC 60034-8
Starting behavior of squirrel-cage motors at 50 Hz: IEC 60034-12
Mechanical vibration: IEC 60034-14
IEC standard voltages: IEC 38
The large terminal box or connection box made of aluminum can be rotated 4 x 90°. For sizes 56 to 80, this is provided with a cable gland. Sizes 90 to 160 have a cable gland and a sealing plug. The terminal box can be positioned anywhere on the right or left side by adjusting the feet.
Of course, you can get our three-phase motors as IE3 motors or using a frequency converter in IE2 and with an attached gearbox as geared motors. On request also as an explosion-proof motor according to ATEX guidelines.
Extensive technical details can be downloaded from our download area.
Technical specifications
- All common basic designs B3, B5, B14A, B35 and B34A available as well as B5B, B5C, B14B, B14C with reinforced bearings
- Motor power range from 0.06 to 200 kW available
- In the basic version, the motors correspond to protection class IP55
- The motors are self-ventilated (IC 411) with plastic radial fans
- Number of poles from 2 to 8 poles available
Materials & Construction
- Housing and end shields are made of aluminum
- From BG 90, the bearing seats are fitted with steel bushes
- Screwed-on feet can be attached either on the right or left
- Equipped with roller bearings from well-known manufacturers such as SKF, NSK or NTN
- All rotors are dynamically balanced according to vibration severity level N with an inserted half key. Vibration severity level R or S on request.
three-phase motor
