Rotor position estimation and correction method for permanent magnet synchronous generator
A generator rotor, permanent magnet synchronous technology, applied in the direction of controlling generators, electrical components, control systems, etc., can solve the problems affecting the reliability of the system, limiting the scope of use of the system, and the accuracy of the sensor is difficult to meet the requirements, and achieves good application prospects, Strong anti-interference ability, achieve simple effect
Active Publication Date: 2009-08-12
NARI TECH CO LTD +1
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The invention provides a method for estimating and correcting the position of a permanent-magnetic synchronous generator rotor. The method comprises the following steps that: by taking zero crossing points of the pole-tip phase/line voltage of a motor as boundaries, a 360-degree electrical angle of a motor rotor is divided into twelve electrical-angle intervals; by taking the relative relation between the phase/line voltage of three phase and zero as a general judgment method of a current angle interval and taking a special judgment process of the current electrical-angle interval provided as a basis, the current electrical-angle interval is judged; according to the electrical rotational speed of the generator rotor, an electrical-angle increment of the motor rotor is obtained through calculation; the sum of the increments of an angle corresponding to an initial point and the electrical angle relative to the initial point in each electrical-angle interval is a position signal of the motor rotor; by taking the quantity of the position signal as the quantity of a basic position signal, the deviation quantity of the position information of the motor rotor is estimated through specific control algorithm; and by taking the deviation quantity as the feedback quantity of a position-correcting link, the quantity of the basic position signal is compensated with an output result through the regulation of a regulator, so that an accurate position signal of the motor rotor can be obtained.
Application Domain
Electric generator control
Technology Topic
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