Motorcycle Charging Circuit With Switched Rectifier Voltage Control
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Solution Overview
Problem
Existing motorcycle power generation systems dissipate redundant energy as heat due to short-circuit voltage regulation, leading to wear and tear of components and require high-voltage-resistant electronic components, increasing manufacturing costs.
Innovation Solution
A power generation system for motorcycles utilizing a full-bridge rectifier circuit, switching voltage regulator circuit, and controller to adjust switching signals, preventing short-circuit voltage regulation and using lower-voltage components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If short-circuit voltage regulation is used to control output voltage, then the storage battery or vehicle load is protected from damage, but redundant energy is dissipated as heat causing wear and tear of components
Solution Approach 1:
The patent converts the harmful effect of redundant energy (which would be wasted as heat in short-circuit regulation) into useful energy by introducing a energy storage device that captures and stores the excess energy, then releases it when needed, thereby protecting components while eliminating energy waste
Solution Approach 2:
The patent introduces a energy storage device as an intermediary between the generator and the load, which mediates the energy flow by absorbing excess energy during high generation periods and releasing it during high demand periods, thus preventing both energy waste and component damage
2Power
If the generator operates at high rotational speed to meet start charging voltage requirements, then the charging voltage is sufficient, but the voltage exceeds 100V requiring high-voltage-resistant electronic components which increases manufacturing cost
Solution Approach 1:
The patent employs dynamic voltage regulation by controlling the switching timing of the full-bridge rectifier circuit based on real-time detection of generator voltage and current, allowing the system to adaptively adjust the output voltage to remain within safe limits while maintaining sufficient charging power
Solution Approach 2:
The patent changes the operating parameters of the rectifier circuit by dynamically adjusting the switching angle and duty cycle based on the generator's rotational speed and voltage output, thereby controlling the peak voltage to stay below 100V even during high-speed operation, eliminating the need for expensive high-voltage-resistant components
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
Reduces energy waste, avoids component wear, and lowers manufacturing costs by controlling peak voltages and using non-high-voltage-resistant components, enhancing system efficiency.
Implementation Method 1
the engine drives a generator to generate three-phase power
Implementation Method 2
a three-phase power generated by the generator is regulated by a rectifier circuit to a direct-current output voltage
Implementation Method 3
an inductor, having a first terminal coupled to a first terminal of the output capacitor, and a second terminal
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A power generation system (2) includes: a generator (22), driven by an engine (20) to generate a three-phase power; a full-bridge rectifier circuit (23), generating a direct-current voltage signal according to the three-phase power and a switching signal output; a switching voltage regulator circuit (24), coupled to the full-bridge rectifier circuit (23) to receive the direct-current voltage signal and buck the direct-current voltage signal according to a control signal (C1), so as to generate an output voltage to power a storage battery (21); and a controller (25), coupled to the full-bridge rectifier circuit (23) and the switching voltage regulator circuit (24), and configured to generate the control signal (C1) and the switching signal output and output the control signal (C1) and the switching signal output respectively to the switching voltage regulator circuit (24) and the full-bridge rectifier circuit (23). The controller (25) adjusts the switching signal output according to at least a voltage value of the direct-current voltage signal and a preset voltage value.