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This paper presents a unified control method for the combined permanent magnet generator (PMG) and three-phase boost rectifier that can be used in autonomous power systems such as more-electric aircraft requiring high power density. With the unified control, the paper shows the system can function well without additional boost inductors. The design procedure for the control is presented, including...
PM motor's speed sensorless control does not work well in the low speed. To avoid this issue, open-loop control is usually used to start the motor, and then it is switched to sensorless close-loop control. The transition between the two control modes can cause a transient during the starting process. This transient can be undesirable especially for motor drives with front-end rectifier and small energy...
When the wind power accounts for a large portion of the grid power, it may need to help the grid voltage and frequency regulation. This paper investigates a permanent-magnet wind generator with a full power voltage-source converter in weak-grid mode, where the DC-link voltage needs to be controlled from the generator side instead of the grid side. The energy relationship of the wind generator, DC-link...
In this paper, permanent magnet wind generator with full power converter is investigated in weak grid systems, where the dc-link voltage needs to be controlled from the generator side instead of grid side. When wind power takes a large portion of grid power, it needs to help grid to regulate the voltage and frequency. To achieve this, a variable step search algorithm based on the derivation of the...
This work describes the design and implementation of a DSP-based control regulating the output voltage of an electric generator for aircraft applications. Voltage regulation in an aircraft system is a challenging task due to a wide range of operating conditions. Control schemes based on the model of synchronous generators have been proposed because they naturally account for changes in the operation...
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