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Rotation angle detection circuit, rotation angle detection method, sample analyzer and computer program for sample analyzer
Rotation angle detection circuit, rotation angle detection method, sample analyzer and computer program for sample analyzer
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机译:旋转角度检测电路,旋转角度检测方法,样品分析仪及样品分析仪的计算机程序
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摘要
A brushless motor includes: a 2n-pole (n: natural number) rotor; and a first Hall element and a second Hall element arranged at a positional relationship of an angle α (0°α180°) from each other with respect to a rotation axis of the rotor. The first Hall element and the second Hall element each output a voltage signal in accordance with a magnitude of a magnetic field of the rotor. A rotational angle detection circuit for detecting a rotational angle of the brushless motor includes: a phase detection circuit that receives the voltage signals from the first Hall element and the second Hall element and that detects a phase of the rotor by using values of the voltage signals and information of the angle α; and an angle calculation circuit that calculates a rotational angle of the rotor calculated from an initial angle based on the phase and a predetermined reference angle.
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