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
Method and system for dynamic digital rights bundling
Semiconductor device element formed on SOI substrate comprising a hollow region, and having capacitors in an electric field alleviation region
Method of treating lung cancer
Wearable display device
Wild card auto completion
  Randomly Featured Patents
Bacterial proteins with pesticidal activity
USB female connector
Out-of-order coding
Infra-red line-scanning target detectors
Method and apparatus for aligning an optical device
System and method for determining available capacity of a rechargeable battery
Method of inhibiting angiogenesis by administration of a corticotropin releasing factor receptor 2 agonist
Multiprocessor module packaging
Bicycle wheel rim