System for monitoring operation execution of pulse width modulation duty for motor control

A system for monitoring pulse width modulation (PWM) duty operation execution for motor control, the system comprising:

• a motor control unit for operating a PWM duty for motor control, and outputting a confirmation signal of the PWM duty operation execution for determining whether or not the PWM duty is updated normally to a detection and failure diagnosis circuit;
• and
• the detection and failure diagnosis circuit for outputting a failure determination signal for determining whether or not the operation execution and update of the PWM duty are performed normally within a PWM duty update reference timing based on the confirmation signal of the PWM duty operation execution
• wherein the detection and failure diagnosis circuit comprises:
• a clock PLL circuit for receiving a clock signal from an external oscillator to generate a clock signal required for a counter generator;
• the counter generator for receiving a PWM duty operation execution signal outputted from the digital output section of the motor control unit and the clock signal outputted from the clock PLL circuit to generate and output a first counter signal and a second counter signal required for failure determination for the PWM duty operation and update;
• and
• a failure determination circuit for outputting a first failure determination signal and a second failure determination signal as a signal for determining whether or not the PWM duty operation execution and update fails based on the first counter signal and the second counter signal outputted from the counter generator.