Brushless DC motor having drive circuit generating superimposed signal

An identification device that identifies a type of a brushless DC motor,

• wherein the brushless DC motor includes an output terminal for outputting a signal,
• the output terminal is able to output a superimposed signal in which signals of a plurality of types are superimposed,
• the superimposed signal differs for each type of a plurality of brushless DC motors,
• the identification device includes
• a power supply terminal for supplying a power to the brushless DC motor,
• an input terminal that is electrically connected to the output terminal of the brushless DC motor,
• a filter circuit that separates the superimposed signal into signals of a plurality of types, and
• a controller that identifies a type of the brushless DC motor,
• wherein the identification device acquires the superimposed signal output from the output terminal when the power is supplied to the brushless DC motor from the power supply terminal,
• the filter circuit separates the superimposed signal into signals of a plurality of types, and
• the controller identifies a type of the brushless DC motor using a separated signal.

A brushless DC motor, comprising:

• a drive circuit that generates a superimposed signal in which signals of a plurality of types are superimposed;
• an output terminal for outputting the superimposed signal;
• and
• a power supply terminal for inputting a power,
• wherein the superimposed signal includes a unique information of the brushless DC motor and the unique information differs for each type of a plurality of brushless DC motors, and
• when the power is input via the power supply terminal, the drive circuit outputs the superimposed signal to an identification device identifying the unique information of the each type of the plurality of brushless DC motors via the output terminal.