Instantaneous failure compensation circuit
AssigneeAmerican Sterilizer Company
InventorsFrancis J. Zelina, Thomas E. Olon
Life of this patent
Estimating the term…
Abstract
A compensation circuit includes a circuit for monitoring the current delivered to a load and for producing a switching signal whenever a current spike is detected. A control signal representative of the desired voltage across the load is produced. A power supply supplies voltage to the load in response to the control signal. The circuit for generating the control signal is responsive to the switching signal for adjusting the control signal such that when a current spike is detected the voltage delivered to the load is substantially instantaneously reduced.
Claims18
A compensation circuit for substantially instantaneously reducing the output voltage of a power supply in response to a current spike, said compensation circuit comprising:
- means for monitoring the current delivered to a load for producing a switching signal whenever a current spike is detected;
- means for providing a first ocntrol signal representative of the desired voltage across the load and a second control signal representative of a minimum voltage across the load;
- and
- power supply means for supplying voltage to the load in response to said control signals,
- said means for providing being responsive to said switching signal for providing said second control signal when a current spike is detected such that said voltage delivered to the load is substantially instantaneously reduced.
A compensation circuit for substantially instantaneously reducing the output voltage of a power supply in response to a current spike, said compensation circuit comprising:
- means for monitoring the current delivered to a load, including input means for generating a first input signal representative of the instantaneous value of the current and a second input signal representative of the average value of the current, and means for comparing said first and second input signals for producing a switching signal whenever a current spike is detected;
- means for generating a control signal representative of the desired voltage across a load;
- and
- power supply means for supplying voltage to the load in response to said control signal,
- said means for generating a control signal being responsive to said switching signal for adjusting said control signal such that when a current spike is detected said voltage delivered to the load is substantially instantaneously reduced.
A compensation circuit for substantially instantaneously reducing the output voltage of a power supply in response to a current spike generated by a lamp failure, said compensation circuit comprising:
- means for monitoring the current delivered to the lamps, including input means for generating a first input signal representative of the instantaneous value of the current and a second input signal representative of the average value of the current, and means for comparing said first and second input signals for producing a switching signal whenever a current spike caused by a lamp failure is detected;
- means for generating a first control signal representative of a desired lamp intensity;
- means for generating a second control signal representative of a minimum lamp intensity;
- switch means for receiving said first control signal and for selectively transmitting same in response to said switching signal;
- and
- power supply means responsive to said switch means and said second control signal for supplying voltage in accordance with said first control signal when no current spike is detected and in accordance with said second control signal when a current spike is detected.
Dependencies are inferred from the claim text.