Power Source Circuit Voltage Stability Power Loss
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Solution Overview
Problem
Existing power source circuits for battery-driven equipment experience power loss due to the need for a higher predetermined voltage detection level to stabilize voltage output, leading to inefficient conversion even when the battery voltage is sufficient for producing the required voltage levels.
Innovation Solution
A power source circuit incorporating a first converter to boost the battery voltage, a second converter to adjust voltage levels, a switch to manage voltage supply between the converters, and a controller to detect changes in current and control the switch, optimizing voltage conversion to minimize power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the predetermined voltage detection level is set higher to stabilize voltage output during instantaneous battery voltage drops, then voltage stability is improved, but power loss increases due to unnecessary DC-to-DC conversion
Solution Approach 1:
The patent applies dynamics by making the voltage detection level changeable based on operating conditions. The control unit dynamically adjusts the predetermined level between a first level (higher) during instantaneous voltage drops and a second level (lower) during normal operation, allowing the system to adapt to different states and avoid unnecessary power conversion.
Solution Approach 2:
The patent changes the parameter of voltage detection level based on detected operating conditions. When an instantaneous voltage drop is detected, the level is set to a first predetermined level; otherwise, it is set to a second predetermined level. This parameter change enables the system to balance voltage stability with power efficiency.
2Reliability
If the DC-to-DC converter continuously boosts battery voltage to maintain stable output, then voltage stability is improved, but energy efficiency deteriorates
Solution Approach 1:
The patent uses feedback by having the control unit continuously detect battery voltage and load current, then adjust the voltage detection level and converter operation accordingly. The system monitors the actual voltage state and only activates the DC-to-DC converter when necessary, avoiding continuous conversion and improving energy efficiency while maintaining stability.
Solution Approach 2:
The system dynamically determines whether to activate the DC-to-DC converter based on real-time detection of voltage drops and load conditions. Instead of continuous operation, the converter is activated only when the battery voltage falls below the dynamically adjusted predetermined level, optimizing the balance between stability and energy efficiency.
3Reliability
If the voltage detection level is set higher to account for voltage drops, then voltage stability during transient conditions is improved, but the system operates in high-power conversion mode unnecessarily during normal operation
Solution Approach 1:
The patent makes the voltage detection level dynamic rather than fixed. The control unit sets the level to a first predetermined value during instantaneous voltage drops and a second predetermined value during normal operation. This dynamic adjustment allows the system to maintain stability during transients while improving conversion efficiency during normal operation by avoiding unnecessary high-power conversion mode.
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 solution effectively suppresses power loss by dynamically adjusting voltage conversion based on load current changes, ensuring stable voltage supply and reducing energy wastage even when the battery voltage drops.
Implementation Method 1
a first converter configured to convert a battery voltage of a battery to a first voltage higher in level than the battery voltage
Implementation Method 2
a second converter configured to convert selective one of the battery voltage and the first voltage to a second voltage lower in level than the voltage to be converted
Data Source
AI summary
A power source circuit includes a first converter, a second converter, a switch and a controller. The switch is configured to switch between a first state and a second state, in which in the first state, a first voltage is not supplied to the second converter whereas in the second state, the first voltage is supplied to the second converter. The controller controls the switch to change the first state to the second state in response to detection of the change in a first current flowing in a first load. The second converter is configured to convert a battery voltage of a battery to a second voltage lower than the battery voltage when the switch switches to the first state and convert the first voltage to the second voltage lower than the first voltage when the switch switches to the second state.