Patent ID: 8860346
Filing Date: 2014-10-14
Classification: G01D,H02P

Abstract:
1. An angle detection device comprising: plural sensors configured to output corresponding sinusoidal signals, wherein each of the sinusoidal signals varies sinusoidally depending on a rotational angle of a rotor of a motor, and each of the sinusoidal signals has a phase that depends on a position of the corresponding sensor; a vector generating unit configured to generate a vector represented by a result of mutually operating at least two of the sinusoidal signals; a vector rotation unit configured to rotate the vector by operating the vector and reference sine waves having corresponding phases; and an angle search unit configured to cause the vector rotation unit to sequentially rotate the vector until a phase of the vector becomes a predetermined phase, and configured to detect an angle between the vector prior to being rotated and the predetermined phase as the rotational angle of the rotor of the motor.