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:
May. 17, 2022
Filed:
Apr. 17, 2019
Mitsubishi Heavy Industries Thermal Systems, Ltd., Tokyo, JP;
Hidetaka Sato, Tokyo, JP;
Tomoyasu Osaki, Tokyo, JP;
Keiji Nagasaka, Tokyo, JP;
Ryota Kojima, Tokyo, JP;
Abstract
This on-board air conditioner control device comprises: a PTC heater which is contained in a high-voltage circuit and generates heat by means of power supplied from a high-voltage battery; a micro-controller which is contained in a low-voltage circuit and controls the power supplied to the PTC heater from the high-voltage battery; a current detection sensor which is contained in the high-voltage circuit and outputs a voltage signal indicating a value for the current flowing through the PTC heater; a V/f conversion unit which is contained in the high-voltage circuit and converts the voltage signal outputted by the current detection sensor to a frequency signal; and a digital isolator which transmits the frequency signal to the micro-controller while preserving electrical insulation between the V/f conversion unit and the micro-controller.