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

• Main Author: HAMADA SHUHEI
• Format: Patent
• Language: English; Japanese
• Published: 16.01.2020
• Subjects: CINEMATOGRAPHY; 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; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; GENERATION; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; HOLOGRAPHY; MAGNETOGRAPHY; PACKING; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; STORING; TRANSPORTING

To solve the problem in which, motor control becomes unstable due to a value of integral control when a rotation speed is first estimated after a method of estimating a rotation phase is switched from an induced voltage method to a high-frequency superposition method being different from a value different from the last estimated rotation speed before the method for estimating the rotation phase is switched.SOLUTION: When a switching signal switches from "H" to "L", a phase difference control unit 514i sets a speed ω1 last input before the switching signal switches from "H" to "L" as an initial value of integral control.SELECTED DRAWING: Figure 6 【課題】 回転位相を推定する方式が誘起電圧方式から高周波重畳方式に切り替わった後の最初に回転速度が推定される際の積分制御の値が、回転位相を推定する方式が切り替わる前の最後に推定された回転速度とは異なる値になることに起因してモータの制御が不安定になる。【解決手段】 切替信号が'Ｈ'から'Ｌ'に切り替わると、位相差制御部５１４ｉは、切替信号が'Ｈ'から'Ｌ'に切り替わる前の最後に入力された速度ω１を積分制御の初期値として設定する。【選択図】 図６