| 摘要 |
There is provided a drive control method for a motor including multiple sets of coils and drive circuits in an electric power steering system. In order to reduce computational load when sensorless control is executed, an electrical angle estimator (110) includes an ±-axis voltage component adder (115) and a ²-axis voltage component adder (116) that add together voltage vectors of a first coil (221) and a second coil (222) expressed in a two-phase fixed coordinate system, an ±-axis current component adder (117) and a ²-axis current component adder (118) that add together current vectors of the first coil (221) and the second coil (222) expressed in a two-phase fixed coordinate system, and an induced voltage computing unit (119) that computes an induced voltage (E) based on an added voltage vector and an added current vector. |
