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Voltage control utilizing multiple PWM patterns

專利號
US10097090B1
公開日期
2018-10-09
申請人
International Business Machines Corporation(US NY Armonk)
發(fā)明人
Andrew Ferencz; Todd E. Takken; Paul W. Coteus; Xin Zhang
IPC分類
G05F1/00; H02M3/158; H02M1/36; H02P9/30; H02M1/08; H02M1/00
技術(shù)領(lǐng)域
voltage,steady,controller,converter,pwm,may,cyclic,pattern,in,cycle
地域: NY NY Armonk

摘要

A power-delivery system may comprise a load device and a direct-current converter configured to deliver current to the load device when the direct-current converter is in an on state. The power-deliver system may comprise a voltage-measurement system configured to measure, at a beginning of each measurement cycle in a cyclic measurement pattern, a voltage at the load device. The power-deliver system may comprise a power controller configure to receive, at the beginning of each measurement cycle, the measurement of the voltage, and to perform, at the beginning of a control cycle in a cyclic control pattern, a voltage-control decision in response to a change in the measurement of the voltage being below a voltage-change threshold. The voltage-control decision may comprise whether to switch the state of the first direct-current converter. The cyclic control pattern may operate at a first frequency, and the measurement pattern may operate at a second frequency.

說明書

The steady-state algorithm may output “high” (e.g., 1) when it decides to set a converter (or multiple converters) to an “on” state and output “l(fā)ow” (e.g., 0) when it decides to set a converter to an “off” state. The oversampling algorithm may output “high” on the second oversampling output when it decides to set the converter to an “on” state, which may include overriding a decision by the steady-state algorithm to set the converter to the “off” state or “agreeing” with a decision by the steady-state algorithm to set the converter to the “on” state. The oversampling algorithm may output “l(fā)ow” on the second oversampling output when it either decides to defer to the decision of the steady-state algorithm, or to set the converter to the “off” state (which, again, may include overriding a decision of the steady-state algorithm to set the converter to the “on” state, or “agreeing” with a decision of the steady-state algorithm to set the converter to the “off” state). The oversampling algorithm may output “high” on the first oversampling output when it decides to defer to the decision of the oversampling controller. The oversampling algorithm may output “l(fā)ow” on the first oversampling output when it decides to set the converter to the “off” state (which, again, may include overriding a decision of the steady-state algorithm to set the converter to the “on” state, or “agreeing” with a decision of the steady-state algorithm to set the converter to the “off” state).

In embodiments in which controllers 516 and 518 are both physical controllers, controller 518 may override or defer to the decision of controller 516 with a more direct circuit that either interrupts or does not interrupt the output of controller 516. However, in some embodiments, the outputs of controllers 516 and 518 may be input into a logic-gate system similar to the logic-gate system discussed above.

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