| 摘要 |
PURPOSE:To sequentially calculate generated torque of an induction motor momentarily by detecting a space rotary current vector, and calculating the space rotary current vector. CONSTITUTION:3-phase/2-phase converters 1, 2, a vector rotary unit 5 for converting the 2-phase current of a rotor side from rotary coordinates to stationary coordinates, vector analyzers 4, 6 for producing a space rotary current vector, a phase angle detector 7 for detecting the space phase difference between the rotary current vectors of stator and rotor sides to calculate a sinusoidal value corresponding to the space phase difference, a multiplier 8 for calculating the product of the magnitude of the space vectors, and an output multiplier 10 for calculating the generated torque by corresponding to the sinusoidal value calculated for the prescribed coefficient are provided. |
