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This study proposes a sensorless maximum power point tracking (MPPT) control using an improved variable-speed small-scale wind power generation system (WPGS) with a permanent magnet synchronous generator. The passive elements of a small-scale WPGS that use a conventional boost converter suffer from disadvantages that result in power losses, increased costs, and increased system size. Therefore, to...
In this paper, the control method of extracting maximum power from the seaflow energy is proposed. This paper describes a variable speed seaflow generation system consisted on permanent magnet synchronous motor, bridge rectifier, boost converter and Fuzzy controller. In this proposed seaflow generation system, the duty ratio of boost converter is controlled by the fuzzy controller. An advantage of...
In this paper, a new speed sensorless control based on a fuzzy compensator is proposed for the interior permanent magnet synchronous motor (IPMSM) drives. The conventional proportional plus integrate (PI) control are very sensitive to a step change of the command speed, parameter variations and load disturbance. To settle these problems of the PI control, the estimated speeds are compensated by using...
This paper presents a sensorless speed control of interior permanent magnet synchronous motors using an adaptive integral binary observer that PI gains of the system are fixed. To overcome the error due to fixed PI gain, the output currents of the observer are precisely adjusted by a fuzzy rule based system, which is a logical model of the human behavior for process control. In order to improve the...
This paper proposes new control method of maximum power point tracking for the tidal energy generation system using the duty ratio control of buck type DC-DC converter. An advantage of new MPPT(Maximum Power Point Tracking) control method presented in this paper is not necessary to use the tidal turbine characteristic at various tidal speed and measure the tidal speed or/and the rotation speed of...
In this paper, a new speed sensorless control based on an instantaneous reactive power and a fuzzy controller are proposed for the interior permanent magnet synchronous motor (IPMSM) drives. The conventional fixed gain PI and PID controllers are very sensitive to step change of command speed, parameter variations and load disturbance. Also, to the estimated speeds are compensated by using an instantaneous...
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