Method and system for controlling output current of a large, low

Details Method and system for controlling output current of a large, low Method and system for controlling output current of a large, low

1997-01-17

1998-05-26

Hecker, Stuart N.

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

323 247, 363 97, G05B 2402

Patent

active

057571767

ABSTRACT:
A method and system for controlling the output current of large, low-voltage, DC power supply which includes at least one transformer primary by controllably switching an AC power line voltage to the primary as a function of actual and desired output currents. SCRs are used to switch, using phase control, the AC primary voltage to the transformer(s) of the power supply in order to control the output current. Given the incoming power line voltage, the current value from the previous power line cycle and the desired current for the present cycle, the function is used to find the SCR firing angle to attain the desired output current in the present power line cycle. Actual measurements of output current and power line voltage are used to modify the function to reflect changes in power line voltage and/or circuit impedance to obtain a modified function. Preferably, instantaneous changes in power line voltage are measured and used to change the input variables to the function in order to provide instantaneous corrections for power line voltage changes. Diagnostic information concerning the operation of the DC power supply is determined from the modified function.

REFERENCES:
patent: 3735237 (1973-05-01), Derby
patent: 3938031 (1976-02-01), Blackmond
patent: 4345139 (1982-08-01), Higgins
patent: 4351022 (1982-09-01), Dolland et al.
patent: 4821202 (1989-04-01), Davis et al.
patent: 5149940 (1992-09-01), Davis et al.
patent: 5351175 (1994-09-01), Blankenship
patent: 5483463 (1996-01-01), Qin et al.

Affiliated with

Also associated with

Rating

Method and system for controlling output current of a large, low does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for controlling output current of a large, low, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for controlling output current of a large, low will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1965709