Title:
DUTY RATIO CALCULATION DEVICE
Document Type and Number:
Japanese Patent JP2022046003
Kind Code:
A
Abstract:
To secure accuracy without making a configuration complicated even in a case of using LPF.SOLUTION: A portion that calculates a duty ratio of a control system 1 calculates a duty ratio from an input signal modulated by changing the duty ratio by a pulse width modulation method. The portion that calculates the duty ratio comprises: an LPF that removes a signal in a predetermined frequency band from the input signal and uses it as a removed signal; and a CPU 210 that calculates a corrected duty ratio of the removed signal based on the predetermined relation between a pulse frequency or period and a correction amount.SELECTED DRAWING: Figure 1
Inventors:
SATAKE TAKANORI
YAMAUCHI YUZO
HAYASHI SHOJI
YAMAUCHI YUZO
HAYASHI SHOJI
Application Number:
JP2020151810A
Publication Date:
March 23, 2022
Filing Date:
September 10, 2020
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
H03K9/08; G01R29/02
Attorney, Agent or Firm:
Fukami patent office
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