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
Build process management system
Gate timing for short servo wedge in disk memory systems
Server-side connection resource pooling
Measuring apparatus for measuring a physical property of a sample
Image forming apparatus capable of timely starting different image formation mode
Organic light emitting diode light source device
Handheld electronic communication device having sliding display
  Randomly Featured Patents
Filter material
Raw coke for electricity storage carbon material and needle coke
Liquid/gas separator and slug flow eliminator and process for use
Combined safety glasses and pencil holder and pencil sharpener therefor
Angelonia plant named `Balangdeum`
Toner concentration monitoring apparatus located behind a transparent photoconductor
Full side shift system for detachable rotary apparatus
Electrical field sensing and transmitting apparatus
Junction barrier Schottky (JBS) with floating islands
Capacitor integration at top-metal level with a protection layer for the copper surface