Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1998-01-28
1999-09-21
Ro, Bentsu
Electricity: motive power systems
Switched reluctance motor commutation control
318439, 318722, H02P 614
Patent
active
059558512
ABSTRACT:
The present invention is a brushless dc motor driver system for quiet commutation of current from one load winding to another load winding. The system comprises a first circuit, a second circuit and a third circuit. Each circuit comprises an upper field effect transistor connected at one end to a voltage source and at its other end to a junction of a corresponding lower field effect transistor and a load. The system further comprises a resistor electrically connected to each lower transistor. The resistor generates a signal representative of the total current of the three circuits. The system also comprises a pulse width modulator electrically connected to each field effect transistor. The modulator controls the commutation system. The modulator comprises a comparing means, a responsive means, a gate slew and a determining means. The comparing means measures the total current signal to a reference signal and generates a first signal that indicates whether the total current signal exceeds a predetermined ratio to the reference signal. The responsive means responds to the first signal and generates a second signal that indicates whether the system is commutating. The second signal also maintains a substantially constant current in the three circuits. The gate slew is electrically connected to each field effect transistor and generates a third signal that indicates whether the field effect transistors are switching. The determining means determines when commutation has terminated by comparing the first signal, the second signal and the third signal.
REFERENCES:
patent: 5014016 (1991-05-01), Anderson
patent: 5569989 (1996-10-01), Acquaviva
patent: 5600218 (1997-02-01), Holling et al.
patent: 5614797 (1997-03-01), Carobolante
patent: 5642247 (1997-06-01), Giordano
patent: 5668449 (1997-09-01), Carobolante
patent: 5821714 (1998-10-01), Williams
patent: 5825145 (1998-10-01), Pham et al.
Solie Eric M.
Williams Robert A.
Harris Corporation
Ro Bentsu
LandOfFree
Brushless dc motor PWM scheme for quiet commutation 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 PWM scheme for quiet commutation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brushless dc motor PWM scheme for quiet commutation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-83315