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
Isolated Australian coral reef fluorescent proteins and cell-based kinase or phosphatase platforms for cancer drug development
Wide viewing angle indicators for network devices
Method and system for encrypting data in a wireless communication system
Target output device and extreme ultraviolet light source apparatus
Portable multimedia player
Extract of Vanilla planifolia
Client-managed group communication sessions within a wireless communications system
  Randomly Featured Patents
Electronic circuit biasing control system
Particle sensor with features for setting, adjusting and trimming the flow rate of the sampled air
Device for measuring the forces generated by a rotor Imbalance
Truck bed extension
Carpet engaging vehicle container holder
Ablation catheter and methods for treating tissues
PCR process and arrangement for DNA amplification using dry reagents
Two piece trim strip
Multiphase flow measurement system