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:
Nov. 08, 2022
Filed:
Feb. 27, 2019
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Chih-hung Yen, Bloomfield Hills, MI (US);
Taeyoung Han, Bloomfield Hills, MI (US);
Bahram Khalighi, Birmingham, MI (US);
Kuo-huey Chen, Troy, MI (US);
Shailendra Kaushik, Novi, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60H 1/22 (2006.01); H05B 3/34 (2006.01); H05B 1/02 (2006.01);
U.S. Cl.
CPC ...
B60H 1/2218 (2013.01); B60H 1/2225 (2013.01); H05B 1/0238 (2013.01); H05B 3/34 (2013.01); B60H 2001/2293 (2013.01); H05B 2203/02 (2013.01);
Abstract
A heating apparatus is provided. The heating apparatus includes a positive temperature coefficient (PTC) heating element and a power controller configured to generate and apply a pulse width modified signal to the PTC heating element. The power controller is configured to vary a current of the pulse width modified signal linearly with respect to a temperature of a space being heated by the PTC heating element.