Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1999-06-24
2000-12-19
Nappi, Robert E.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02P 706
Patent
active
061631191
ABSTRACT:
A sensorless speed control method of a high speed motor utilizing a reverse electromotive force comprises the steps of: adjusting to 50% a positive duty of rectangular waves generated from a reverse electromotive force signal of the high speed motor after accelerating the high speed motor in an accelerated speed mode to a mode switch RPM (first duty adjusting step); measuring a pulse difference between a rectangular wave edge and a synchronous signal when a voltage is adjusted to allow an ideal current waveform to be formed, thereby setting up a sensorless mode switch condition; utilizing the pulse difference measured in the switch condition set-up step to switch the high speed motor from an accelerated mode to a sensorless mode; and switching the high speed motor at the mode switch step to sensorless mode and increasing the RPM of the high speed motor to a high speed to thereby adjust a positive duty of the rectangular wave. There is an advantage of the inventive method in that the high speed motor is accelerated to switched RPM, a positive duty of a rectangular wave is adjusted at 50% and the high speed motor is switched from switched RPM to sensorless mode to raise the RPM to a high speed and to adjust the positive duty of the rectangular wave to 50%, thereby enabling stable motor control at high speed and a sensorless mode switch.
REFERENCES:
patent: 4275343 (1981-06-01), Fulton et al.
patent: 4746844 (1988-05-01), MacKelvie et al.
patent: 4939600 (1990-07-01), Desai et al.
patent: 5023527 (1991-06-01), Erdman et al.
patent: 5036264 (1991-07-01), Ueki
patent: 5125067 (1992-06-01), Erdman
patent: 5206567 (1993-04-01), Sakurai et al.
patent: 5260811 (1993-11-01), Morikawa
patent: 5327053 (1994-07-01), Mann et al.
patent: 5751131 (1998-05-01), Sears et al.
patent: 5838128 (1998-11-01), Maiocchi et al.
patent: 5953491 (1999-09-01), Sears et al.
patent: 5982122 (1999-11-01), Hollenbeck et al.
Bushnell Esq. Robert E.
Leykin Rita
Nappi Robert E.
Samsung Electronics Co,. Ltd.
LandOfFree
Sensorless speed control method of high speed motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sensorless speed control method of high speed motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensorless speed control method of high speed motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-273487