JP2011120342A5

JP2011120342A5 -

Info

Publication number: JP2011120342A5
Application number: JP2009273869A
Authority: JP
Filing date: 2009-12-01
Publication date: 2013-01-24
Anticipated expiration: 2029-12-01

Description

本発明の一側面としてのモータ駆動装置は、モータのロータ位置を検出する検出手段の出力に応じて該モータのコイルへの通電を切り替える第１駆動手段と、所定の時間間隔に従って前記モータの前記コイルへの通電を切り替える第２駆動手段と、前記第１駆動手段及び前記第２駆動手段を切り替えて前記モータを駆動制御する制御手段とを有し、前記制御手段は、前記第１駆動手段によって前記モータを駆動制御したときに、前記ロータの回転速度が一定となるまでに要するステップ数と被駆動部材の目標ステップ数との関係に基づいて、前記第１駆動手段で前記モータを駆動してから前記第２駆動手段で該モータを駆動する第１駆動モード、及び、該第２駆動手段のみで該モータを駆動する第２駆動モードの一つを選択するものであって、前記目標ステップ数が前記ステップ数以上である場合に前記第１駆動モードを選択し、前記目標ステップ数が前記ステップ数より小さい場合に前記第２駆動モードを選択する。 A motor drive device according to one aspect of the present invention includes: a first drive unit that switches energization to a coil of the motor according to an output of a detection unit that detects a rotor position of the motor; and the motor of the motor according to a predetermined time interval. A second driving unit that switches energization to the coil; and a control unit that controls driving of the motor by switching between the first driving unit and the second driving unit, and the control unit is controlled by the first driving unit. When the motor is driven and controlled, the first driving means drives the motor based on the relationship between the number of steps required until the rotational speed of the rotor becomes constant and the target number of steps of the driven member. the first driving mode for driving the motor in the second drive means, and, be one that selects one of the second driving mode for driving the motor only in the second drive means from the The target step number to select the first drive mode when it is more than the number of the step, select the second drive mode when the number of the target step is less than the number of steps.

Claims

First driving means for switching energization to a coil of the motor according to the output of the detecting means for detecting the rotor position of the motor;
Second driving means for switching energization to the coil of the motor according to a predetermined time interval;
Control means for controlling the drive of the motor by switching between the first drive means and the second drive means,
When the motor is driven and controlled by the first driving means, the control means is based on the relationship between the number of steps required until the rotation speed of the rotor becomes constant and the target number of steps of the driven member. One of a first driving mode in which the motor is driven by the second driving means after the motor is driven by the first driving means, and a second driving mode in which the motor is driven only by the second driving means. be one to choose,
Motor drive the number of the target step selects the first drive mode when it is more than the number of the steps, the number of the target step is characterized you to select the second drive mode is smaller than the number of steps apparatus.

The motor driving apparatus according to claim 1, wherein the number of steps varies depending on a voltage for driving the motor.

The motor drive device according to claim 1, wherein the number of steps varies depending on an attitude of the motor drive device.

4. The motor drive device according to claim 1, wherein the number of steps varies depending on an environmental temperature of the motor drive device. 5.

When the first drive mode is selected, the second drive unit starts driving the motor, then the first drive unit drives the motor, and the second drive unit again uses the second drive unit. The motor driving apparatus according to claim 1, wherein the motor driving apparatus is driven.