Resources Contact Us Home
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
Combination scoop and mold press for dough fishing bait
Squarylium compound, method for producing the same and infrared absorbent
Fast, language-independent method for user authentication by voice
Driving mechanism, fixing device, and image forming apparatus
Application of alternate align primitives during SAS rate matching to improve continuous adaptation
Bromination of telomer mixtures derived from toluene and styrene
Laundry bag and kit for washing shoes
  Randomly Featured Patents
Storage controller and duplicated data detection method using storage controller
Food debris filtering apparatus for dishwasher and method thereof
Training-based channel estimation for multiple-antennas
Image forming apparatus and method thereof
Customizing email subjects for subscription generated email messages
Providing telephony services to terminals behind a firewall and/or a network address translator
Electro-optical devices in which pixel section and the driver circuit are disposed over the same substrate
Fastening system for fastening a plate within an enclosure
Process for improving the appearance of a multilayer finish
Method and apparatus for synchronizing an adaptable security level in an electronic communication