Motor control device and imaging apparatus

An imaging apparatus, comprising:

• an imaging unit configured to capture a subject image incident through a lens to output image data;
• a DC motor for driving the lens;
• a one-phase encoder configured to generate a pulse according to rotation of the DC motor;
• a counter configured to count pulses output from the one-phase encoder;
• and
• a controller configured to recognize a rotation number of the DC motor based on the number of the pulses counted by the counter, wherein
• after the DC motor which is being driven is braked, the controller starts applying a predetermined voltage to the DC motor at a first timing which is a timing before the DC motor stops, and stops the applying of the predetermined voltage at second timing which is a timing after the DC motor stops,
• the controller subtracts a number of the pulses generated after the second timing from a value counted by the counter, and
• the predetermined voltage is lower than a lowest voltage necessary for driving the lens and higher than a lowest voltage necessary for rotating the DC motor against an attracting force between a magnet and a coil in the DC motor.

A lens barrel, comprising:

• a lens;
• a DC motor for driving the lens;
• a counter configured to count pulses output from a one-phase encoder according to rotation of the DC motor;
• and
• a controller configured to recognize a rotation number of the DC motor based on the number of the pulses counted by the counter, wherein
• after the DC motor which is being driven is braked, the controller starts applying a predetermined voltage to the DC motor at a first timing which is a timing before the DC motor stops, and stops the applying of the predetermined voltage at a second timing which is a timing after the DC motor stops,
• the controller subtracts the number of the pulses generated after the second timing from a value counted by the counter, and
• the predetermined voltage is lower than a lowest voltage necessary for driving the lens and is higher than a lowest voltage necessary for driving the DC motor against an attracting force between a magnet and a coil in the DC motor.