Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Power supply apparatus capable of detecting abnormality of current flowing through drive circuit










Image Number 7 for United States Patent #7355826.

A current detection unit starts sampling of a motor current at the timing when the motor current has exceeded a threshold value, and holds a maximum motor current value for each prescribed operation cycle. An abnormality determination unit determines whether the maximum motor current value is greater than the threshold value, and counts the number of times that the maximum motor current value continuously exceeds the threshold value. When the count value has reached at least 3, the abnormality determination unit generates and outputs a detection signal indicating abnormality in the motor current to a relay drive unit and a notification unit. The relay drive unit in receipt of the detection signal generates a signal to turn off the system relays. The notification unit generates and outputs a signal AL to display means outside the power supply apparatus.








 
 
  Recently Added Patents
Lipoprotein analysis by differential charged-particle mobility
Round carrying case
Frame syncrhonization in orthogonal frequency-division multiplexing systems
Topical antibiotic composition for the prevention of Lyme disease
Semiconductor device and method for manufacturing the same
Electronic communication device
Method of forming solderable side-surface terminals of quad no-lead frame (QFN) integrated circuit packages
  Randomly Featured Patents
Image pickup apparatus and control method therefor
Systems and methods for inspecting an edge of a specimen
Broadband or mid-infrared fiber light sources
Ground surveillance Doppler radar
Aerial toy
Universal gas burner with dual adjustable flexible venturi tube assembly for gas-fired barbecue grills
Molded ball grid array
Housing for outboard motors
Intermediates for the preparation of pharmaceutical thiophene compounds
Method and apparatus for performing model-based layout conversion for use with dipole illumination