Title:
SILENT SPIN SINE WAVE GENERATOR
Document Type and Number:
Japanese Patent JP2002010673
Kind Code:
A
Abstract:
To reduce acoustic noise by smoothing a rotation of a multi-phase DC motor.
Three waves (45, 46 and 47) for applying a driving voltage to each winding of the motor shall be generated in one combination. Each wave has a 360° cycle and a first segment (43) having a 0 value within the range of 120°. A second segment (50) follows to the first segment within the range of 60°, and a third segments (67, 68) follow thereto having two consecutive 'cap' shapes within the range of 120°. Next to the third segment, a fourth segment (52) follows having a 'down slope' shape within the range of 60°.
Inventors:
NG VINCENT
WHITE BERT
WHITE BERT
Application Number:
JP2001137170A
Publication Date:
January 11, 2002
Filing Date:
May 08, 2001
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC
International Classes:
H02P6/10; H02K23/00; (IPC1-7): H02P6/10
Attorney, Agent or Firm:
Akira Asamura (3 outside)
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