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A 15kW Brushless DC (BLDC) motor drive system suitable shipboard applications has been developed. This platform meets shipboard interface requirements with low cost and high power density. It consists of a Pulse-Width Modulated (PWM) Current Source Rectifier (PWM-CSR) and front end Voltage Source Inverter (VSI) modules feeding a high efficiency PM Motor. Converter modules can be interchanged in order...
Brushless DC Motor (BLDCM) usually has 3 hall position sensors, and they play a key role for motor control. In order to determine hall locations relative to the stator windings, the permanent magnet motor rotor flux-oriented method has been analyzed and it provides a theoretical basis for us. Thus, the exact locations of sensors can be found. Through the decode logic of 3 hall signals, 6 drive signals...
The windup phenomenon caused by the current limitation and PWM voltage regulation in the brushless DC motor (BLDCM) double PI loop speed regulating system has been investigated. And the anti-windup controller has been applied to suppress the relevant windup phenomenon. The simulation illustrates that the anti-windup controller make the BLDCM speed regulating less overshoot and quickly dynamic response...
In this paper, an accurate method for sensorless control of permanent magnet brushless motors is explained. The method doesn't include any modification to the classical construction of such motors and can be easily integrated within the drive electronics. It is applicable to both motor types, i.e. those with sinusoidal or trapezoidal back EMF.. The back EMF waveform is extracted on-line using simple...
The paper detail analyzes the relationship between position phase error and free-wheel current of inactive phase. It is found that free-wheel current error can exactly reflect position phase error, and a novel closed loop control method to correct position phase is proposed. In order to keep free-wheel current of the inactive phase symmetrical, free-wheel current error is inputted to PI controller,...
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