Permanent magnet synchronous motor for passenger ship propulsion

A special permanent magnet synchronous motor for ship propulsion in the power range between 50 and 250 kW is presented. It is fed by a PWM-voltage source inverter with field oriented control. A motor feature is the very low stator inductance. It leads to low reactive power and high maximum torque, b...

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Bibliographic Details
Published in2009 13th European Conference on Power Electronics and Applications pp. 1 - 10
Main Author Mecke, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2009
Subjects
Control of Drive
Inductance
Induction motors
Marine vehicles
Permanent magnet motor
Permanent magnet motors
Power system harmonics
Propulsion
Pulse width modulation inverters
Reactive power
Ship
Stators
Synchronous motor
Synchronous motors
Variable speed drive
Vector control
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Summary:A special permanent magnet synchronous motor for ship propulsion in the power range between 50 and 250 kW is presented. It is fed by a PWM-voltage source inverter with field oriented control. A motor feature is the very low stator inductance. It leads to low reactive power and high maximum torque, but on the other hand it produces large current ripples and therefore harmonic losses up to 10 % of the electrical input power. Two methods are investigated to reduce the stator current ripples and therefore the harmonic power content. The first method is the increase of the inverter switching frequency. An increase from 4 kHz to 9 kHz reduces the harmonic power content from 6,3 % to 1,5 %. A more simple way is a three-phase inverter output inductance. An inductance of 0,1 mH also reduces the harmonic power content to 1,5 %.
ISBN:1424444322
9781424444328