Features of permanent magnet synchronous motors VECTOMOTOR

Synchronous motor with permanent magnet

A permanent synchronous motor (also called a "PM motor") is a motor in which a magnetic field is generated by permanent magnets. It is characterized by a constantly magnetized rotor that is moved synchronously, in other words without the so-called "slip", with the magnetic rotational field of the stator.

Product data PM-synchronous motor VECTOMOTOR VM600m

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VM600M-1AW0318

Marine (Permanent magnet)

Continuous torque 1): 3180 Nm
Rated speed nN: 1500 1/min
Nominal current : 583 Arms

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VM600M-18W0191

Marine (Permanent magnet)

Continuous torque 1): 1910 Nm
Rated speed nN: 1500 1/min
Nominal current : 460 Arms

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VM600M-1AW0573

Marine (Permanent magnet)

Continuous torque 1): 5730 Nm
Rated speed nN: 1500 1/min
Nominal current : 820 Arms

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VM600M-1AW0446

Marine (Permanent magnet)

Continuous torque 1): 4460 Nm
Rated speed nN: 1500 1/min
Nominal current : 639 Arms

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VM600M-18Z0012

Auxiliary (Permanent magnet synchronous)

Noiminal torque 1): 30 Nm
Rated speed nN: 3000 1/min
Peak current : 26.3 Arms

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VM600M-18W0018

Auxiliary (Permanent magnet synchronous)

Noiminal torque 1): 67 Nm
Rated speed nN: 3000 1/min
Peak current : 57.5 Arms

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VM600M-18Z0027

Auxiliary (Permanent magnet synchronous)

Rated speed nN: 3000 1/min
Peak current : 180 Arms

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VM600M-18W0027

Auxiliary (Permanent magnet synchronous)

Noiminal torque 1): 94 Nm
Rated speed nN: 3000 1/min
Peak current : 241 Arms

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More informationen

Structure and function of permanent magnet synchronous motors

As with all electric motors, a permanent magnet synchronous motor (in short: PM motor) basically consists of a stator and a rotor. The stator is equipped with coils, while external surface magnets are attached to the rotor. AC voltage is applied to the stator coils, which causes them to generate a magnetic field that continuously moves in a circle due to the three phases of the flowing current. A further magnetic field surrounds the magnets attached to the rotor. The rotation of the rotor ultimately results from the attraction and repulsion of the two magnetic fields.

Application areas for permanent magnet synchronous motors

PM motors with non-buried magnets are optimally suited for applications in which little space is available for the motor and that benefit from high efficiency at full load. In addition, PM motors are good for applications that do not require a particularly high field weakening ability. Such applications include, for example, ship’s propellers, generators, or auxiliary drives such as compressors.

Advantages and disadvantages of permanent magnet synchronous motors

Advantages

•    Maximum efficiency
•    Dynamic speed control possible
•    Fast reaction to load change
•    Small installation space, low weight

Disadvantages

•    In the case of traction drives, the possible high braking torques in the case of a short-circuit must be taken into account.
•    More difficult for field weakening
•    During operation with field weakening, a possible overvoltage must be taken into account when loads are shed.
•    Dependency on magnets

Further motor topologies