SELF-OSCILLATING RESONANT POWER CONVERTER

摘要

The present invention relates to resonant power converters and inverters comprising a self-oscillating feedback loop coupled from a switch output to a control input of a switching network comprising one or more semiconductor switches (S1, S2). The self-oscillating feedback loop sets a switching frequency of the power converter (100) and comprises a first intrinsic switch capacitance (CGD) coupled between a switch output and a control input of the switching network and a first inductor (LG). The first inductor (LG) is coupled in-between a first bias voltage source and the control input of the switching network and has a substantially fixed inductance. The first bias voltage source is configured to generate an adjustable bias voltage (VBias) applied to the first inductor (LG). The output voltage (V0UT) of the power converter (100) is controlled in a flexible and rapid manner by controlling the adjustable bias voltage (VBias).

主权项

1. A resonant power converter comprising:
an input terminal for receipt of an input voltage; a switching network comprising one or more semiconductor switches controlled by respective control inputs; the switching network comprising a switch input operatively coupled to the input terminal for receipt of the input voltage and a switch output operatively coupled to an input of a resonant network of the resonant power converter; the resonant network comprising a predetermined resonance frequency (fR) and an output operatively coupled to a converter output terminal; and a self-oscillating feedback loop coupled from the switch output to a control input of the switching network to set a switching frequency of the power converter, the self-oscillating feedback loop further comprising:
a first intrinsic switch capacitance coupled between the switch output and the control input of the switching network;a first bias voltage source configured to generate a first adjustable bias voltage;a first inductor with substantially fixed inductance coupled in-between the first bias voltage source and the control input of the switching network; anda voltage regulation loop configured to control an output voltage of the power converter by controlling the first adjustable bias voltage applied to the first inductor.