Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1993-04-12
1995-01-03
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318254, H02P 540
Patent
active
053789768
ABSTRACT:
A brushless DC motor detects a positional relationship between the rotor and the stator windings in a short period of time when starting the motor and immediately switches the mode from a phase coincidence mode at the time of starting to a normal position detecting mode performed by counting output pulses in response to the rotational speed of the rotor. The motor detects a position of the rotor at an extremely high accuracy independently of the magnitude of the load even when the motor has already been subjected to the application of such a load at the time of starting. The motor is always driven at a high efficiency by applying a phase correction process so as to cause the phase of each of the voltages respectively induced in the stator windings to coincide with the corresponding one of the driving currents respectively outputted to the stator windings when the motor is being rotated normally.
REFERENCES:
patent: 3872369 (1975-03-01), Rich
patent: 3996454 (1976-12-01), Froyd
patent: 4529922 (1985-07-01), Ono
patent: 5013982 (1991-05-01), Sasaki
patent: 5130620 (1992-07-01), Inaji et al.
patent: 5140245 (1992-08-01), Stacey
patent: 5225759 (1993-07-01), Endo et al.
Inaji Toshio
Ueda Eiji
Cabeca John W.
Matsushita Electric Industries Co., Ltd.
Shoop Jr. William M.
LandOfFree
Brushless DC motor without a position sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brushless DC motor without a position sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brushless DC motor without a position sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2213579