US6204618B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting method for brushless DC motor and device for the same
Assignee: Transpacific IP Ltd
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Filing: 1999-07-07
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Granted: 2001-03-20
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Expires: 2019-07-07
Abstract
Abstract The present invention is a starting method for brushless DC motor and a device for the same, especially adapted to provide the starting method for a single-phase DC brushless motor in an open circuit and the device for the same. According to the art as disclosed in the present invention, there are two successive steps in starting a motor. An oscillator signal is transmitted to the driver at first, which causes the motor to oscillate in both clockwise and counter-clockwise direction. An operating signal is then sent to cause the motor to rotate normally in one direction once the motor is out of the dead initiating position. By that the rotor can be triggered out of the dead initiating position when the motor is going to start and the motor can be smoothly operated under the low cogging torque.
Inventors
- 👤 King Yin Wang
- 👤 Li-Te Kuo
- 👤 Jieh-Yee Huang
- 👤 Shyh-Jier Wang
- 👤 Tai-Fa Ying
- 👤 Der-Ray Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/20; H02P6/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A method for starting a motor, comprising: generating an oscillator signal by a signal generator within a first time period; generating an operating signal by said signal generator within a second time period; driving said motor to oscillate both clockwise and counter-clockwise according to said oscillator signal by a driver; driving said motor to be out of a dead initiating position; and driving said motor to rotate in one direction according to said operating signal by said driver.
Claim 2
Independent Claim
78 words
A method for starting a motor, comprising: generating an oscillator signal by a signal generator within a first time period; generating an operating signal by said signal generator within a second time period; driving said motor to oscillate both clockwise and counter-clockwise according to said oscillator signal by a driver; driving said motor to be out of a dead initiating position; and driving said motor to rotate in one direction according to said operating signal by said driver.
Claim 3
Dependent Claim
51 words
The method as recited in claim 1 , wherein said signal generator further comprises an oscillator for generating said oscillator signal; a one-shot multivibrator for generating a triggering signal; and a multiplexer for sending either said oscillator signal or said operating signal according to the voltage state of said triggering signal.
Claim 4
Dependent Claim
27 words
The method as recited in claim 2 , wherein the period of said triggering signal comprises a period of high voltage and a period of low voltage.
Claim 5
Dependent Claim
25 words
The method as recited in claim 2 , wherein said multiplexer sends said oscillator signal during said period of high voltage of said triggering signal.
Claim 6
Dependent Claim
25 words
The method as recited in claim 2 , wherein said multiplexer sends said operating signal during said period of low voltage of said triggering signal.
Claim 7
Dependent Claim
25 words
The method as recited in claim 2 , wherein said multiplexer sends said oscillator signal during said period of low voltage of said triggering signal.
Claim 8
Dependent Claim
25 words
The method as recited in claim 2 , wherein said multiplexer sends said operating signal during said period of high voltage of said triggering signal.
Claim 9
Dependent Claim
40 words
The method as recited in claim 2 , wherein said period of high voltage of said triggering signal is equal to the period for said motor to oscillate both clockwise and counter-clockwise to be out of said dead initiating position.
Claim 10
Independent Claim
102 words
A device for controlling a rotor of a motor to be out of a dead initiating position, comprising: a signal generator for sequentially generating an oscillator signal and an operating signal; and a driver for driving said motor according to said oscillator signal or said operating signal generated by said signal generator; wherein said oscillator signal is used by said driver to drive said motor during a first time period, and the length of said first time period is equal to that of the period for said motor to oscillate both clockwise and counter-clockwise to be out of said dead initiating position.
Claim 11
Independent Claim
102 words
A device for controlling a rotor of a motor to be out of a dead initiating position, comprising: a signal generator for sequentially generating an oscillator signal and an operating signal; and a driver for driving said motor according to said oscillator signal or said operating signal generated by said signal generator; wherein said oscillator signal is used by said driver to drive said motor during a first time period, and the length of said first time period is equal to that of the period for said motor to oscillate both clockwise and counter-clockwise to be out of said dead initiating position.
Claim 12
Dependent Claim
35 words
The device as recited in claim 9 , wherein said operating signal is used to drive said driver for driving said motor to rotate in one direction in the end of said first time period.
Claim 13
Independent Claim
99 words
A device for controlling a rotor of a motor to be out of a dead initiating position, comprising: a one-shot multivibrator for generating a triggering signal; a multiplexer for sending either an oscillator signal or an operating signal according to the voltage state of said triggering signal; and a driver for driving said motor according to said oscillator signal or said operating signal; wherein the period of said triggering signal comprises a period of high voltage and a period of low voltage, and said multiplexer sends said oscillator signal during said period of high voltage of said triggering signal.
Claim 14
Independent Claim
99 words
A device for controlling a rotor of a motor to be out of a dead initiating position, comprising: a one-shot multivibrator for generating a triggering signal; a multiplexer for sending either an oscillator signal or an operating signal according to the voltage state of said triggering signal; and a driver for driving said motor according to said oscillator signal or said operating signal; wherein the period of said triggering signal comprises a period of high voltage and a period of low voltage, and said multiplexer sends said oscillator signal during said period of high voltage of said triggering signal.
Claim 15
Independent Claim
40 words
The device as claim recited in 11 , wherein said period of high voltage of said triggering signal is equal to the period for said motor to oscillate both clockwise and counter-clockwise to be out of said dead initiating position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-19 | 2004-09-18 | 2005-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-19 | 2008-09-18 | 2009-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-19 | 2012-09-18 | 2013-03-20 | $7700.00 | Window Closed / Lapsed |