Controller apparatus, driving apparatus, image sensing apparatus, and methods thereof

A driving apparatus comprising:

• an excitation scheme determining section which receives a speed signal from an external device, determines a rotational speed of an external rotor on the basis of the speed signal, and determines an excitation scheme in correspondence with the rotational speed;
• a peak current set signal generating section which generates and outputs a peak current set signal which sets a peak current of a driving current to rotate the rotor in accordance with the rotational speed;
• a control signal generating section which generates and outputs a control signal by the excitation scheme determined by the excitation scheme determining section in accordance with the rotational speed determined by the excitation scheme determining section;
• and
• a driver which receives the peak current set signal from the peak current set signal generating section and the control signal from the control signal generating section, generates a driving current on the basis of the peak current set signal and control signal, and supplies the driving current to the rotor to drive the rotor.

An image sensing apparatus which senses a video image in an arbitrary direction, comprising:

• a camera unit which has at least an image sensing element to sense a video image in a predetermined direction and is rotated to sense the video image in the arbitrary direction;
• a motor which is connected to the camera unit and rotated to direct the camera unit in the arbitrary direction;
• an excitation scheme determining section which receives a speed signal from an external device, determines a rotational speed of the motor on the basis of the speed signal, and determines an excitation scheme in correspondence with the rotational speed;
• a peak current set signal generating section which generates and outputs a peak current set signal which sets a peak current of a driving current to rotate the motor in accordance with the rotational speed;
• a control signal generating section which generates and outputs a control signal by the excitation scheme determined by the excitation scheme determining section in accordance with the rotational speed determined by the excitation scheme determining section;
• and
• a driver which receives the peak current set signal from the peak current set signal generating section and the control signal from the control signal generating section, generates a driving current on the basis of the peak current set signal and control signal, outputs the driving current to the motor to drive the motor, and causes the motor to direct the camera unit in the arbitrary direction corresponding to the speed signal.

A control method for a rotor, comprising:

• receiving a speed signal, determining a rotational speed of the rotor on the basis of the speed signal, and determining an excitation scheme in correspondence with the rotational speed;
• generating and outputting a peak current set signal which sets a peak current of a driving current to rotate the rotor in accordance with the rotational speed;
• and
• generating and outputting a control signal by the determined excitation scheme in accordance with the determined rotational speed.

A driving method for a rotor, comprising:

• receiving a speed signal, determining a rotational speed of the rotor on the basis of the speed signal, and determining an excitation scheme in correspondence with the rotational speed;
• generating and outputting a peak current set signal which sets a peak current of a driving current to rotate the rotor in accordance with the determined rotational speed;
• generating and outputting a control signal by the determined excitation scheme in accordance with the rotational speed;
• and
• generating a driving current to rotate the rotor on the basis of the peak current set signal and control signal and supplying the driving current to the rotor to drive the rotor.

An image sensing method of sensing a video image in an arbitrary direction, comprising:

• in rotating a rotor to direct a camera unit in the arbitrary direction and causing the camera unit to perform image sensing, the camera unit having an image sensing element which senses a video image in a predetermined direction and being connected to the rotor, determining a rotational speed of the rotor on the basis of a speed signal received from an external device and determining an excitation scheme in correspondence with the rotational speed;
• generating and outputting a peak current set signal which sets a peak current of a driving current to rotate the rotor in accordance with the determined rotational speed;
• generating and outputting a control signal by the determined excitation scheme in accordance with the rotational speed;
• and
• generating a driving current on the basis of the peak current set signal and control signal, supplying the driving current to the rotor to drive the rotor, and directing the camera unit in the arbitrary direction corresponding to the speed signal.