Motor controller having pulse width modulation generating mechanism

A motor controller having a pulse width modulation generating mechanism, comprising:

• a triangular wave signal generator circuit configured to output a triangular wave signal;
• a comparing circuit connected to the triangular wave signal generator circuit, wherein the comparing circuit compares a plurality of voltages of the triangular wave signal from the triangular wave signal generator circuit with a voltage of an input control signal to determine a plurality of voltage levels of a plurality of pulse waves of a pulse width modulation signal so as to determine duty cycles of the plurality of pulse waves of the pulse width modulation signal, and the comparing circuit outputs the pulse width modulation signal;
• a signal detector circuit connected to the comparing circuit, and configured to detect a duty cycle of each of the plurality of pulse waves of the pulse width modulation signal to output a duty cycle detected signal;
• and
• a control converter circuit connected to the signal detector circuit and a driver circuit of a motor, wherein the control converter circuit converts the duty cycle of each of the plurality of pulse waves of the pulse width modulation signal that is indicated by the duty cycle detected signal as an arithmetic value into a control value according to a preset ratio, the control converter circuit outputs the control value to the driver circuit connected to the motor, and the driver circuit drives the motor to rotate according to the control value from the control converter circuit.