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It is obvious that hybrid propulsion ship with shaft generator system can make much better use of energy, thus with high efficiency. A novel Variable Speed Constant Frequency (VSCF) shaft generator system used on modern ship is analyzed and its structure, operational principle and control strategy are studied in this paper. The system simulation model of the shaft generator system is built in the...
Traditional marine induction motors or synchronous motors are often occupy a large space, severe vibration and noise and difficult to meet the requirements of high energy index under different load rates. This paper presents that permanent magnet synchronous generator (PMSG) is used as shaft motor to utilize the excess power of main engine effectively. Based on analytical analysis of cogging torque...
The power sources with different frequencies are needed in modern shipboard power system, while conventional variable frequency generator set can't satisfy the various requirements. A novel doubly-fed speed-adjustable variable frequency generator set is studied and the stator flux oriented vector control strategy and its application under shipboard power system voltage and frequency fluctuations are...
In the marine power propulsion system, when a synchronous generator-transformer-converter system is operating, the output electric quality is very important. Traditional analytic solution is difficult to consider the damper circuit, tooth-slot effect, winding distribution effect. Thus, the finite element method coupled circuit in time domain is employed in this paper to analysis voltage waveforms...
A design method for high-speed energy storage electric machines on basis of boundary constraints is presented in this paper. The motor power, storage energy and rotor's mechanical robustness are regarded as boundary constraints. This strategy is capable of deciding necessary dimensions of the machines, and optimizing energy density. In the meantime, rotor material mechanical robustness can be employed...
This paper presents a marine motor control strategy based on the combination of indirect vector control and feedforward compensation. Through the torque feedforward link, desired electromagnetic torque is acquired. Assisted with indirect vector control, desired quadrature-axis currents are obtained with respect to the calculated motor torque and given direct-axis current. Then the two currents are...
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