Patent
Regulated mains power pack with phase:shift correction - has multi-loop control system with proportional differential action
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TLDR
In this paper, a multi-loop control system with phase-shift correction is presented, which consists of a rectifier (1) with mains input (2) whose output is connected to a controlled switch (4), followed by an L-C low-pass filter (6, 7) bridged by a diode (8).Abstract:
The regulated mains power supply with phase-shift correction comprises a rectifier (1) with mains input (2) whose output is connected to a controlled switch (4). The switch is followed by an L-C low-pass filter (6, 7) bridged by a diode (8). The load (10) is connected across the filter output. The output is taken to an adder (13) having a reference input (15) and whose output is taken to a PI controller (12). The controller output is taken to an adder (16) which has an input taken from the filter input (18) via a smoothing circuit or integrator (17) having a first-order phase-shift. The adder output is taken to a proportional controller (19). The controller output drives the switch (4). The multi-loop control system provides an optimum phase margin of +90 deg. with which to compensate the phase-shift due to the low-pass filter.read more
Citations
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Proceedings ArticleDOI
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