MOTOR CONTROL DEVICE, SHEET CONVEYING DEVICE, AND IMAGE FORMING APPARATUS

• Main Author: HAMADA SHUHEI
• Format: Patent
• Language: English; Japanese
• Published: 12.12.2019
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; CONVEYING; ELECTRICITY; GENERATION; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

To solve the problem in which: even through a phase difference based on a formula in which a parameter of a motor is approximated to 0 is converged to 0, an estimated phase based on the phase difference may be a phase different from an actual rotational phase; as a result of this, torque to be given to a rotor of the motor may not be efficiently generated.SOLUTION: A target value determination unit 514c determines a target value Δθ_tgt on the basis of a rotation speed ω_est and a current value iδ. As a result, vector control is performed on the basis of a phase θ in which the influence of an item ignored when the formula (6) is derived is reduced, and torque to be given to a rotor can be efficiently generated. That is, a motor can be efficiently controlled.SELECTED DRAWING: Figure 6 【課題】 モータのパラメータが０に近似された式に基づく位相差が０に収束しても、前記位相差に基づく推定位相は実際の回転位相とは異なる位相である可能性がある。この結果、モータの回転子に与えるトルクを効率的に発生させることができない可能性がある。【解決手段】 目標値決定部５１４ｃは、回転速度ω＿ｅｓｔと電流値ｉδとに基づいて目標値Δθ＿ｔｇｔを決定する。この結果、式（６）を導出する際に無視された項の影響が低減された位相θに基づいてベクトル制御が行われ、回転子に与えるトルクを効率的に発生させることができる。即ち、モータを効率的に制御することができる。【選択図】 図６