Invention Grant
- Patent Title: Alternator overvoltage protection circuit
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Application No.: US14147223Application Date: 2014-01-03
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Publication No.: US09197058B2Publication Date: 2015-11-24
- Inventor: Maynard S. Guadiz
- Applicant: MTD Products Inc
- Applicant Address: US OH Valley City
- Assignee: MTD Products Inc
- Current Assignee: MTD Products Inc
- Current Assignee Address: US OH Valley City
- Agency: Wegman, Hessler & Vanderburg
- Main IPC: H02H7/06
- IPC: H02H7/06 ; H02H7/09 ; H02H3/20

Abstract:
Disclosed is an alternator overvoltage protection circuit having a TRIAC and a MOSFET. The TRIAC is electrically connected to the MOSFET and the TRIAC is electrically connected to a magneto. The TRIAC is configured to ground the magneto when triggered by the MOSFET. The MOSFET is electrically connected to an alternator and configured to conduct when the alternator operates in an overvoltage condition. Also disclosed is a method of alternator overvoltage protection for a piece of outdoor power equipment, the method including providing a TRIAC and an alternator rotated by an engine having a magneto, wherein the alternator outputs a voltage when rotated by the engine. The method further includes configuring the TRIAC to ground the magneto when the alternator operates in an overvoltage condition, thereby disabling the magneto, which stops the rotation of the engine and stops the alternator from outputting voltage.
Public/Granted literature
- US20140192442A1 Alternator Overvoltage Protection Circuit Public/Granted day:2014-07-10
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