Voltage Converter Self-Powered PWM Control via Inductive Coupling
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Solution Overview
Problem
Conventional voltage converters require complex circuit elements and face challenges in providing stable operating power for pulse width modulation signal generating circuits, leading to increased costs and instability.
Innovation Solution
A voltage converting apparatus that includes a pulse width modulation signal generating circuit, power transistor, inductors, and a feedback rectifier, which generates feedback power by coupling voltages across inductors and rectifying them to provide stable operating power, reducing power consumption and enhancing applicability across different voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output voltage of the voltage converter is used to generate auxiliary operating power for the pulse width modulation signal generating circuit, then the operating power can be provided, but the circuit elements become more complicated and the cost increases
Solution Approach 1:
The patent combines the power conversion function and the auxiliary power generation function into a single integrated circuit structure. The output voltage from the voltage converter is directly coupled to generate the auxiliary operating power for the pulse width modulation signal generating circuit, eliminating the need for separate power generation circuits and reducing overall circuit complexity.
Solution Approach 2:
The voltage converter circuit is designed to serve multiple functions: it performs the primary voltage conversion task while simultaneously generating the auxiliary operating power needed by the control circuit. This multi-functionality reduces the need for additional dedicated power generation components.
2Reliability
If the output voltage of the voltage converter is used to generate auxiliary operating power, then power can be provided, but technique difficulties arise in providing stable operating power
Solution Approach 1:
The patent implements a feedback mechanism where the output voltage of the voltage converter is monitored and used to regulate the generation of auxiliary operating power. This feedback control ensures that the auxiliary power remains stable even when input conditions vary, addressing the technical difficulty of providing stable operating power.
3Productivity
If conventional voltage converters are used with pulse width modulation signal generating circuit, then voltage conversion can be performed, but power consumption is high
Solution Approach 1:
The voltage converter is designed to generate its own auxiliary operating power from its output voltage, making the system self-sufficient. The power generated is used to supply the pulse width modulation signal generating circuit, eliminating the need for external power sources and reducing overall power consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus provides stable feedback power to the pulse width modulation signal generating circuit, reducing power consumption and expanding the voltage converting apparatus's applicable range by generating appropriate voltage levels for auxiliary operating power.
Implementation Method 1
A terminal of the second inductor is coupled to the first reference ground, and a second terminal of the second inductor couples with a voltage on the first inductor and generates a coupling voltage
Implementation Method 2
The feedback rectifier is coupled between the second terminal of the second inductor and a terminal of the pulse width modulation signal generating circuit for receiving a feedback power, and rectifies the coupling voltage to generate the feedback power
Data Source
AI summary
A voltage converting apparatus is disclosed. The voltage converting apparatus includes a pulse width modulation (PWM) signal generating circuit, a power transistor, a first inductor, a second inductor and a feedback rectifier. The PWM signal generating circuit receives a feedback power to be an operating power and generates a PWM signal. A first terminal of the power transistor receives an input voltage, and a control terminal of the power transistor receives the PWM signal. The second inductor couples with a voltage on the first inductor and generates a coupling voltage. The feedback rectifier rectifies the coupling voltage to generate a feedback power.