초록 ▼

A regulator circuit for equalizing the load currents of a plurality of power supply modules connected in common to feed a common load. Each of the modules includes a pulse-width modulator for adjusting the duty cycle of the module, thereby to adjust the voltage regulation point and corresponding cur

A regulator circuit for equalizing the load currents of a plurality of power supply modules connected in common to feed a common load. Each of the modules includes a pulse-width modulator for adjusting the duty cycle of the module, thereby to adjust the voltage regulation point and corresponding current output of the module. A current sensor produces a current level signal proportional to the current output of the module. The current level signal is applied through a current amplifier to generate a corresponding variable error voltage. A fixed reference voltage derived from the output voltage and the variable error voltage are applied to the pulse-width modulator to vary the duty cycle so as to produce a decrease in load voltage with an increase in current output and an increase in the load voltage with a decrease in current output thereby equalizing the current output of the module with modules having substantially equal output voltages. A low pass filter interposed in the regulator feedback path assures current sharing under quasi steady-state conditions without degradation of high frequency response to dynamic load changes.

대표청구항 ▼

A regulator circuit for equalizing the load currents of a plurality of power supply modules connected in common to supply a common load voltage, each of said modules comprising modulator means for adjusting the load current of said module substantially independently of load current changes in any ot

A regulator circuit for equalizing the load currents of a plurality of power supply modules connected in common to supply a common load voltage, each of said modules comprising modulator means for adjusting the load current of said module substantially independently of load current changes in any other module, current sensing means responsive to a load current of said module for producing a current signal indicative of said load current of said module, voltage sensing means responsive to its load voltage for providing a first voltage signal corresponding thereto, and means for applying said current and voltage signals to said modulator means, said modulator means being constructed so that said load current is adjusted in a substantially inversely proportional manner to changes in its load voltage, wherein said modulator means comprises pulse width generator means responsive to said current level and said first voltage signal for producing a pulse width signal such that said duty cycle is adjusted to incrementally decrease said load current of said module with an increase in load voltage, and to incrementally increase said load current with a decrease in load voltage, said current sensing means further comprising means responsive to said load current for providing a second voltage signal proportional thereto, means for providing a predetermined reference voltage, and first circuit means responsive to the difference of said predetermined reference voltage and said second voltage signal for providing an error signal representative thereof, said regulator circuit further comprising second circuit means which is responsive to the difference of said error signal and said first voltage signal for producing pulse signals which have pulse widths that are linearly proportional to the difference between said error signal and said first voltage signal.