Position sensorless motor controller

Abstract

Abstract PROBLEM TO BE SOLVED: To control a motor efficiently by generating a reference value of current variation based on a current or a current command value being fed through a stator winding thereby generating an estimation angle of a rotor accurately. SOLUTION: In a controller comprising a microcomputer 8 for controlling a brushless motor 5, a sensorless control section 30 starts a voltage pulse generating section 31 every set time and delivers a d-axis voltage pulse vd* and a q-axis voltage pulse vq* to the voltage command value generating section 13 in a current control section 10. A variation generating section 41 generates a d-axis voltage variation Δid and a q-axis voltage variation Δiq. In order to eliminate the effect of magnetic saturation due to increase of a current command value ia, a shift generating section 42 generates a shift eθ using a reference value of current variation generated based on the current command value ia. Subsequently, a lead generating section 43 generates a lead Δθ and delivers it to an estimation angle generating section 16 and also inputs it to a speed generating section 44 thus generating a speed value ω of the rotor 3.

Inventors

• 👤 Tomokuni Iijima
• 👤 友邦 飯島
• 👤 Kazunari Narasaki
• 👤 和成 楢崎
• 👤 Toru Tazawa
• 👤 徹 田澤
• 👤 Yukinori Maruyama
• 👤 幸紀 丸山

Bibliographic Details