Power Supply Circuit Zero Current Switching
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Solution Overview
Problem
Mobile power supplies experience significant energy consumption when charging electronic devices due to energy loss within the power supply itself, leading to inefficient energy transfer.
Innovation Solution
A power supply circuit and method incorporating a voltage boosting unit with a consumption reducing module that enables zero current turn-on or turn-off of power devices, utilizing a configuration of transistors, inductors, diodes, and capacitors to minimize energy loss during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a voltage boosting unit is used to charge electronic devices from a lithium battery, then the charging capability is improved, but energy consumption within the power supply increases
Solution Approach 1:
The patent applies preliminary action by pre-charging the body diode of the switch tube before turning on the switching transistor. This is achieved by controlling the body diode to conduct in advance, establishing a current path that allows the transistor to turn on with zero current. This preliminary preparation eliminates turn-on current spikes and reduces energy loss during the charging operation.
Solution Approach 2:
The patent implements feedback control through a control circuit that monitors the charging state and dynamically adjusts the control signals for the body diode and switching transistor. The control circuit receives feedback about the charging condition and modulates the gate-source voltage of the transistor and the body diode conduction timing accordingly, optimizing energy efficiency during the voltage boosting charging process.
2Power
If power devices are turned on or off during voltage boosting, then voltage regulation is achieved, but current spikes cause energy loss
Solution Approach 1:
The patent applies preliminary action by pre-charging the body diode of the switch tube before turning on the switching transistor. This is achieved by controlling the body diode to conduct in advance, establishing a current path that allows the transistor to turn on with zero current. This preliminary preparation eliminates turn-on current spikes and reduces energy loss during the charging operation.
Solution Approach 2:
The patent implements feedback control through a control circuit that monitors the charging state and dynamically adjusts the control signals for the body diode and switching transistor. The control circuit receives feedback about the charging condition and modulates the gate-source voltage of the transistor and the body diode conduction timing accordingly, optimizing energy efficiency during the voltage boosting charging process.
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
This approach reduces energy consumption within the mobile power supply by ensuring zero current flow during power device activation or deactivation, thereby enhancing energy efficiency during charging.
Implementation Method 1
a voltage boosting unit, the voltage boosting unit comprising: a consumption reducing module
Implementation Method 2
The voltage boosting unit comprises a third inductor L3, a first diode VD1, a first transistor S1 and the consumption reducing module 141. The consumption reducing module 141 comprises a first inductor L1, a second inductor L2
Implementation Method 3
a first diode VD1, a second diode VD2, a third diode VD3 and a fourth diode VD4
Data Source
AI summary
The present invention provides a power supply circuit and a power supply method. The power supply circuit comprises: a charge control unit, a battery and battery protection unit, a voltage stabilizing unit and a voltage boosting unit; the voltage boosting unit comprises: a consumption reducing module for, at the moment of turning on or turning off a power device in the voltage boosting unit, enabling an electric current flowing through the power device to be zero. The present invention, by arranging the consumption reducing module, enables an electric current flowing through the power device to be zero at the moment of turning on or turning off the power device in the voltage boosting unit, which realizes zero current turn-on or turn-off of the power device, and reduces consumption of the electric energy.