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Resonant converter, controller for converter and method of forming a controller

A resonant converter, controller technology, applied in control/regulation systems, high-efficiency power electronic conversion, output power conversion devices, etc., can solve problems such as errors

Active Publication Date: 2020-04-07
SEMICON COMPONENTS IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resonant waveform causes a negative current to flow through the switch, introducing error in conventional methods of current regulation

Method used

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  • Resonant converter, controller for converter and method of forming a controller
  • Resonant converter, controller for converter and method of forming a controller
  • Resonant converter, controller for converter and method of forming a controller

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Embodiment Construction

[0018] Embodiments of the systems and methods described herein provide regulation of converters using resonant topologies. Specifically, this disclosure describes the regulation of a flyback converter using nested control loops to control output current, output power, and output voltage. Errors due to bidirectional currents due to resonant waveforms and high frequency oscillations due to inductive switching are eliminated while maintaining galvanic isolation between the converter's input and output.

[0019] figure 1 Embodiment 10 of a flyback converter for converting an input voltage (Vin) 12 referenced to ground 14 to an output voltage (Vo) 16 referenced to ground 14 is shown. The transformer includes a primary winding 18 magnetically coupled to a secondary winding 20 in reverse polarity (as schematically indicated by a winding "dot"). A magnetizing inductor (Lm) 22 is connected in parallel with the primary winding 18 . In various embodiments, the magnetizing inductor 22 ...

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PUM

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Abstract

The invention relates to a resonant converter, a controller for a converter and a method of forming a controller. A method for controlling a resonant converter is disclosed, the method comprising maintaining the output current equal to the output power of the converter divided by the converter in response to the secondary current of the transformer being greater than or equal to the maximum output current output voltage. The output power is maintained at a constant output power in response to the output power being greater than or equal to a maximum output power and the secondary current being less than the maximum output current. Maintaining the output current ratio and the constant output power each includes varying a duty cycle of a primary side switch configured to gate a primary current of the transformer. The output voltage is limited by a maximum output voltage in response to the secondary current being less than the maximum output current and the output power being less than the maximum output power.

Description

technical field [0001] The present disclosure relates generally to power conversion and, more particularly, to regulating current and power to a converter using a resonant topology, a resonant converter, a controller for the converter, and a method of forming the controller. Background technique [0002] Flyback converters are ideal for applications requiring a wide input voltage range, or a high voltage output with galvanic isolation between the converter's input and output. The operation of the flyback converter begins by grounding the primary side of the transformer with the switch. Consequently, current flows in the primary side, inducing a magnetic flux in the transformer's magnetic core, which tends to oppose the primary current. By choosing a transformer with reverse polarity windings (for example, the secondary winding is wound on the core in the opposite direction of rotation to the primary winding), the secondary current will not flow while the primary current is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523H02M3/33507H02M1/0009H02M1/342Y02B70/10Y02P80/10
Inventor 戴比亚度·拉纳王兆军
Owner SEMICON COMPONENTS IND LLC