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
Pyramid swivel base assembly
Semiconductor test structures
Insurance claim processing using containerized processing logic
Remote controller and remote controller control method
Determining a route advertisement in a reactive routing environment
Nonvolatile memory device and reading method thereof
Cholesteric liquid crystal device with reflection electrodes and partition structures
  Randomly Featured Patents
Method for transmitting and receiving paging message in wireless communication system
Optical system for wavefront compensation
Power generator
Solids-stabilized emulsion
Device for draining of oil in a component of a vehicle
Apparatus for dispensing solid components from a flexible substrate assembly
Optical bioinstrumentation for living body
Clothes pressing iron soleplate
Application of a therapeutic substance to a tissue location using an expandable medical device
Removing time tag jitter and crossover distortion