A kind of brshless DC motor high-performance speed-measuring method

The present invention relates to a kind of brshless DC motor high-performance speed-measuring method, be applicable to the single, double brshless DC motor to operation to test the speed. First this method judges motor work at present state, in add fast/moderating process, by the displacement that under each Hall state, motor turns over is carried out to correction-compensation, calculates the mean speed of motor under each Hall state at motor, improves the rapidity testing the speed; In the time that motor at the uniform velocity rotates, Hall state of every change, calculates the mean speed that motor rotates a circle, and optimizes the accuracy testing the speed; More adjacent twice Hall state, judges motor steering, realizes two-way range rate measurement; Whether reasonable comprehensive nearly twice Hall state and motor steering, analyze the current hall signal obtaining, and improves the anti-interference of speed-measuring method. This method is applicable to the single, double brshless DC motor to operation to test the speed, and has the accuracy, rapidity and the anti-interference that test the speed concurrently.