US Patent Application 18306569. POWER CONVERSION DEVICE simplified abstract
Contents
POWER CONVERSION DEVICE
Organization Name
Mitsubishi Electric Corporation
Inventor(s)
Kazuhiro Fujioka of Tokyo (JP)
Yoshiaki Ishiguro of Tokyo (JP)
POWER CONVERSION DEVICE - A simplified explanation of the abstract
This abstract first appeared for US patent application 18306569 titled 'POWER CONVERSION DEVICE
Simplified Explanation
The patent application describes a system that sets the duty ratio of a PWM signal based on a target voltage value and detects abnormalities in the voltage detection unit.
- The system includes a setting unit that sets the duty ratio of a PWM signal based on a target voltage value.
- The duty ratio is then outputted to a voltage conversion circuit.
- An estimated value calculation unit calculates an estimated duty ratio value based on the detected input and output voltage values.
- An abnormality detection unit calculates the difference between the updated estimated value and a comparison reference value.
- The abnormality detection unit detects abnormalities in the voltage detection unit based on changes in the calculated difference value.
- The updated estimated value is a newly calculated estimated duty ratio value.
- The comparison reference value is based on the estimated duty ratio value calculated in the previous cycle.
Original Abstract Submitted
A setting unit sets a duty ratio of a PWM signal based on a target voltage value, and outputs the duty ratio to a voltage conversion circuit. An estimated value calculation unit cyclically calculates an estimated duty ratio value based on the detected input voltage value and the detected output voltage value. An abnormality detection unit cyclically calculates, as a difference value, a difference between an updated estimated value and a comparison reference value, and detects abnormality of a voltage detection unit based on a change in calculated difference value. The updated estimated value is a newly calculated estimated duty ratio value. The comparison reference value is a value based on the estimated duty ratio value calculated in a cycle prior to a cycle in which the updated estimated value is calculated.
