DC motor rotation detecting apparatus and DC motor rotation control apparatus

A DC motor rotation control apparatus configured to control at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, comprising:

• at least one rotation detector brush configured to detect a rotation of the rotor;
• a motor driver circuit configured to apply a DC drive voltage to a pair of electrode brushes and to drive the DC motor;
• a reference voltage device configured to generate plural reference voltages which correspond respectively to at least one of different rotational directions of the rotor and voltages applied to the DC motor;
• a comparator configured to compare the voltage detected by the rotation detector brush with one of the plural reference voltages generated by the reference voltage device to generate a pulse train of pulse period corresponding to the rotational speed of the rotor;
• and
• a motor control circuit configured to apply the reference voltage to the comparator and to control the motor driving circuit by reacting to an output signal of the comparator.

A DC motor rotation detection method for detecting at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, comprising:

• detecting a rotation of the rotor using least one rotation detector brush;
• generating a detection voltage;
• generating a reference voltage;
• and
• comparing the detection voltage with the reference voltage to generate a pulse train of pulse period corresponding to the rotational speed of the rotor.

A DC motor rotation control method for controlling at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, comprising:

• detecting a rotation of the rotor using at least one rotation detector brush;
• generating a detection voltage;
• driving the DC motor with a motor driving circuit by applying a DC drive voltage to a pair of electrode brushes;
• generating plural reference voltages which correspond respectively to at least one of different rotational directions of the rotor and voltages applied to the DC motor;
• comparing the voltage detected by the rotation detector brush with one of the plural reference voltages using a comparator to generate a pulse train of pulse period corresponding to the rotational speed of the rotor;
• applying the reference voltage to the comparator using a motor control circuit;
• and
• controlling the motor driving circuit by reacting to an output signal of the comparator.

A DC motor rotation detector configured to detect at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, comprising:

• at least one rotation detection means for detecting a rotation of the rotor;
• a reference voltage generating means for generating a reference voltage;
• and
• a comparing means for comparing a voltage detected by the rotation detection means with the reference voltage generated by the reference voltage generating means to generate a pulse train of pulse period corresponding to the rotational speed of the rotor.

A DC motor rotation control apparatus configured to control at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, comprising:

• at least one rotation detection means for detecting a rotation of the rotor;
• a motor driving means for applying a DC drive voltage to a pair of electrode brushes and for driving the DC motor;
• a reference voltage generating means for generating plural reference voltages which correspond respectively to at least one of different rotational directions of the rotor and voltages applied to the DC motor;
• a comparator means for comparing the voltage detected by the rotation detection means with one of the plural reference voltages generated by the reference voltage generating means to generate a pulse train of pulse period corresponding to the rotational speed of the rotor;
• and
• a motor control means for applying the reference voltage to the comparator means and for controlling the motor driving means by reacting to an output signal of the comparator means.

An apparatus using a DC motor rotation detector device configured to detect at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, said DC motor rotation detector device comprising:

• at least one rotation detector brush configured to detect a rotation of the rotor;
• a reference voltage device configured to generate a reference voltage;
• and
• a comparator configured to compare a voltage detected by the rotation detector brush with the reference voltage generated by the reference voltage device to generate a pulse train of pulse period corresponding to the rotational speed of the rotor.

An apparatus using a DC motor rotation control device configured to control at least one of a rotational direction, a rotational speed, a rotational position, and a cumulative rotation number of a rotor of a DC motor, said DC motor rotation control device comprising:

• at least one rotation detector brush configured to detect a rotation of the rotor;
• a motor driver circuit configured to apply a DC drive voltage to a pair of electrode brushes and to drive the DC motor;
• a reference voltage device configured to generate plural reference voltages which correspond respectively to at least one of different rotational directions of the rotor and voltages applied to the DC motor;
• a comparator configured to compare the voltage detected by the rotation detector brush with one of the plural reference voltages generated by the reference voltage device to generate a pulse train of pulse period corresponding to the rotational speed of the rotor;
• and
• a motor control circuit configured to apply the reference voltage to the comparator and to control the motor driving circuit by reacting to an output signal of the comparator.