Voltage Increasing Circuit for Power Tool Feedback Delay
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Solution Overview
Problem
Power tools with voltage increasing circuits experience delays in feedback control due to temporary decreases in battery voltage when the motor generates a large output, such as during trigger operation or gear shifts.
Innovation Solution
A power tool with a voltage increasing control circuit that includes a voltage increasing unit, a power estimation unit, and a voltage control unit, where the power estimation unit determines power supply increases based on trigger switch operation and motor conditions, such as rotation speed and load torque, to maintain consistent voltage and prevent delays in feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor generates large output during trigger operation or gear shifts, then the power tool can perform high-demand operations, but the battery voltage temporarily decreases causing delays in feedback control
Solution Approach 1:
The control unit predicts the need for power increase before it is actually required by detecting changes in trigger operation state or gear shift conditions. When a gear shift is detected or trigger operation changes, the control unit proactively increases power supply to the motor in advance, preventing voltage drops and feedback control delays before they occur.
Solution Approach 2:
The power supply control is made dynamic by continuously monitoring trigger operation state and gear shift conditions. The control unit adjusts the power supply level in real-time based on the operational phase, increasing power during gear shifts or trigger activation and normalizing it during steady-state operation, thereby maintaining stable voltage while supporting high-power demands when needed.
2Measurement precision
If the voltage increasing circuit performs feedback control to follow changes in power supplied to the motor, then voltage regulation accuracy is improved, but response speed decreases due to voltage drops during high-power demands
Solution Approach 1:
The control unit performs preliminary action by detecting gear shift conditions or trigger operation changes and proactively adjusting power supply before the motor actually demands the power. This prevents the voltage drops that would otherwise occur during feedback control, maintaining both accuracy and response speed by avoiding the conditions that cause delays.
3Loss of time
If the control unit increases power supply in advance during gear shifts or trigger operation, then feedback control delays are suppressed, but energy consumption increases
Solution Approach 1:
The control unit applies preliminary action selectively only during specific conditions such as gear shifts or trigger operation changes, rather than continuously. This targeted approach suppresses feedback control delays only when necessary, minimizing unnecessary energy consumption while still preventing voltage drops during critical operational transitions.
Solution Approach 2:
The power supply control dynamically adjusts based on operational conditions, increasing power only during gear shifts or trigger activation events rather than maintaining elevated power continuously. This dynamic control suppresses feedback delays during high-demand transitions while conserving energy during normal operation, optimizing the balance between response time and energy 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 solution effectively suppresses delays in voltage regulation feedback control by dynamically adjusting power supply to the motor, ensuring consistent voltage and efficient operation even during sudden changes in load conditions.
Implementation Method 1
a voltage increasing unit configured to increase voltage that is supplied from the power supply, and to supply the motor with the voltage
Data Source
Figure 1~2
Figure 3~4D
Figure 5
AI summary
A voltage increasing control circuit is connected to a power supply (12) to regulate power supplied to a load (13). The voltage increasing control circuit includes a voltage increasing unit (30) configured to increase voltage that is supplied from the power supply (12), and to supply the voltage to the load (13). A power estimation unit (21 b) determines whether or not to increase the power supplied to the load (13). A voltage control unit (21 a) controls the voltage increasing unit (30). When the power estimation unit (21 b) determines to increase the power supplied to the load (13), the voltage control unit (21 a) controls the voltage increasing unit (30) to increase the power supplied to the load (13).