The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2018
Filed:
Apr. 27, 2017
Denso Corporation, Kariya, Aichi-pref., JP;
Yuta Mizuno, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A load driving control apparatus calculates current slopes in an on-period and an off-period in one PWM cycle period, respectively, by using actual currents at a start time point and an end time point of the PWM cycle period as well as two sets of data, as data including a duty ratio corresponding to the actual current values. The data is so determined that the actual current data value of predetermined one of the start time point and the end time point is within a learning area. The duty ratio is calculated based on a difference between a target current value and the actual current value until calculation of the current slopes and is completed. The duty ratio is calculated based on the current slopes, the actual current value at start time point and a target current value after the calculation of the current slopes is completed. Since an actual current change characteristic is calculated based on the actual current values and the duty ratio is calculated based on the current change characteristic, robustness is enhanced.