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:
Mar. 13, 2007
Filed:
Sep. 16, 2005
Kwang Kyo OH, Gwangju-City, KR;
Koji Hamaoka, Gwangju-City, KR;
Han Joo Yoo, Gwangju-City, KR;
Pyeong Ki Park, Gwangju-City, KR;
Hun Yub Bae, Gwangju-City, KR;
Yun Jeong Kim, Gwangju-City, KR;
Jeong Ho Seo, Gwangju-City, KR;
Kwang Kyo Oh, Gwangju-City, KR;
Koji Hamaoka, Gwangju-City, KR;
Han Joo Yoo, Gwangju-City, KR;
Pyeong Ki Park, Gwangju-City, KR;
Hun Yub Bae, Gwangju-City, KR;
Yun Jeong Kim, Gwangju-City, KR;
Jeong Ho Seo, Gwangju-City, KR;
Other;
Abstract
A Brushless Direct Current (BLDC) motor starting method and device are provided. With the method and/or device, startup noise and vibration and startup failure rate can be reduced using a constant low-speed startup scheme when the BLDC motor is in startup mode. Additionally, Pulse Width Modulation (PWM) duty is also maintained at low level when the BLDC motor starts up, thereby preventing excessive current from occurring due to desynchronization of the motor at startup, so that it is possible to optimize specifications of an inverter in the BLDC motor. The BLDC motor starts up with a synchronous speed and a PWM duty of a rotor of the BLDC motor being kept constant, and the BLDC motor switches to sensorless mode if a position of the rotor is detected a predetermined number of times or more during a specific time period.