NDLI: Brushless dc motor control system responsive to control signals generated by a computer or the like (Document No: 20080008182)

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Brushless dc motor control system responsive to control signals generated by a computer or the like (Document No: 20080008182)

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1987
Description	A control system for a brushless DC motor responsive to digital control signals is disclosed. The motor includes a multiphase wound stator and a permanent magnet rotor. The rotor is arranged so that each phase winding, when energized from a DC source, will drive the rotor through a predetermined angular position or step. A commutation signal generator responsive to the shaft position provides a commutation signal for each winding. A programmable control signal generator such as a computer or microprocessor produces individual digital control signals for each phase winding. The control signals and commutation signals associated with each winding are applied to an AND gate for that phase winding. Each gate controls a switch connected in series with the associated phase winding and the DC source so that each phase winding is energized only when the commutation signal and the control signal associated with that phase winding are present. The motor shaft may be advanced one step at a time to a desired position by applying a predetermined number of control signals in the proper sequence to the AND gates and the torque generated by the motor may be regulated by applying a separate control signal to each AND gate which is pulse width modulated to control the total time that each switch connects its associated winding to the DC source during each commutation period.
File Size	1378973
Page Count	21
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20080008182
Archival Resource Key	ark:/13960/t1pg6k56j
Language	English
Publisher Date	1987-09-08
Access Restriction	Open
Subject Keyword	Electronics And Electrical Engineering Signal Generators Patents Winding Digital Systems Commutation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Patent

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