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:
Sep. 10, 2024
Filed:
Feb. 19, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Junichiro Oya, Tokyo, JP;
Mineo Yamamoto, Tokyo, JP;
Hiroyuki Ishii, Tokyo, JP;
Yuto Urabe, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An electric motor has a mechanism to detect an overcurrent in an inverter circuit. The electric motor includes a rotor, a stator, and a board. The board includes a power transistor, a first resistor, a second resistor, and a constant voltage diode. The power transistor is included in the inverter circuit, which is configured to change a direction of a current that flows through a winding of the stator. The first resistor is provided between the power transistor and a ground terminal, and configured to detect an overcurrent in the inverter circuit. The second resistor is provided between the power transistor and the first resistor, and configured to detect a current that flows through the winding of the stator. The constant voltage diode is connected parallel to the first resistor.