Resources Contact Us Home
Driver circuit for a d.c. motor without commutator

Image Number 5 for United States Patent #5134682.

A method is disclosed for the low-loss regulation of a d.c. motor without commutator and of a semiconductor circuit in which, during a commutation phase at reduced motor power or rpm as given by a position indicator, the end transistors or one end transistor initially operates temporarily as a switch and thereafter temporarily as an analog amplifier element. During the analog period, a current is available which changes slowly according to a ramp function.

  Recently Added Patents
Drinking glass with ball embedded in base
Tire tread
Fabrication method of semiconductor device and fabrication method of dynamic threshold transistor
Data recording apparatus with recording control based on defect block and control method thereof
Polishing composition
Digital photographing apparatus and control method for evaluating validity of an auto-focus operation
  Randomly Featured Patents
Data distribution system and method of same, data processing apparatus and method of same, and data recording medium
Catalyst composition and structure for a diesel-fueled autothermal reformer placed in and exhaust stream
Deterministic clock control apparatus for a data processing system
Alkaline phosphate-activated clay/zeolite catalysts
Fuel injection nozzle for internal combustion engines
Electronic timepiece
Operational amplifier with extended common-mode input range
Connector assembly
Methods for fabricating wooden frames and the like
Driving mechanism for a record player