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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

Also similar as discussed in FIG. 2B, the first and second converters in FIG. 4B are shown out of phase, and a controller following pattern 404 may alternate providing commands to the first converter and the second converter in alternating cycles. For example, a voltage controller operating according to the steady-state pattern may normally issue a command to the first converter at times 406 and 414 (i.e., the starts of the first and third steady-state cycles) and normally issue a command to the second converter at time 410 (i.e., the start of the second steady-state cycle). In some embodiments, therefore, the steady-state cycles, from the perspective of each converter, may be expressed as twice as long as the cycles of the steady-state pattern 404. For example, one cycle of the steady-state pattern may elapse between time 406 and time 414 from the perspective of the first converter. For this reason, the duty cycles of the first and second converter may be calculated not with respect to the period of the cycles of pattern 404 (e.g., the length of time between time 406 and time 410), but rather with respect to twice the period of the cycles of pattern 404 (e.g., the length of time between time 406 and time 414).

權(quán)利要求

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