AC Induction Motor Generator for Utility Vehicle Voltage Stability
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Solution Overview
Problem
Conventional generators in utility vehicles face inefficiencies due to increased fuel consumption and unstable voltage during power output variations, particularly when regenerating power from braking, as they rely on RPM increases to boost power output, leading to fuel inefficiencies and voltage instability.
Innovation Solution
A power generation system utilizing an AC induction motor coupled with a logic/driver module and internal combustion engine, allowing for controlled electrical energy output and input, enabling regulated power and voltage maintenance without RPM changes, and incorporating a battery source for energy storage and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the RPM of the internal combustion engine is increased to increase the power output of the DC motor, then the power output is improved, but the fuel consumption increases
Solution Approach 1:
The patent changes the operating parameters of the AC induction motor by controlling the frequency and voltage of the electrical power supplied to it, rather than relying solely on RPM changes. The controller adjusts these electrical parameters to regulate power output while maintaining efficient engine operation, thereby resolving the contradiction between power output and fuel consumption.
Solution Approach 2:
The AC induction motor is designed to perform multiple functions: it can operate as a motor to drive the vehicle and as a generator to recover energy during braking. This multi-functionality allows the system to optimize fuel efficiency by capturing regenerative energy, reducing the need for continuous high-RPM engine operation to meet power demands.
2Power
If the RPM of the DC motor is increased to increase the power output during braking, then the power output is improved, but the voltage becomes unstable
Solution Approach 1:
The controller continuously monitors the electrical parameters including voltage, frequency, and power output of the AC induction motor. Based on this feedback, the controller dynamically adjusts the electrical power supplied to the motor to maintain stable voltage levels while maximizing power output during braking regeneration, thus resolving the voltage stability issue.
Solution Approach 2:
The system dynamically adjusts the operating characteristics of the AC induction motor during braking by varying the electrical frequency and voltage in real-time. This dynamic control allows the motor to operate efficiently across different braking conditions, maintaining voltage stability while capturing maximum regenerative energy without the voltage spikes associated with fixed-RPM DC motor systems.
3Power
If a permanent magnet-type DC motor is used with full wave rectification, then the power output can be generated, but the system complexity and fuel consumption increase
Solution Approach 1:
The patent replaces the mechanical commutation system of traditional DC motors with an electrical control system for the AC induction motor. This substitution eliminates the need for mechanical commutators and brushes, reducing mechanical complexity and maintenance requirements while enabling more efficient electrical control of power generation and motor operation.
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 system effectively varies power output and maintains stable voltage, reducing fuel consumption and preventing voltage spikes during regeneration, while optimizing energy use and reducing the need for mechanical commutation, thereby enhancing energy production efficiency and system stability.
Implementation Method 1
an AC induction motor capable of operating as a generator in response to the mechanical driving force of the internal combustion engine, thereby outputting electrical energy to the controller
Implementation Method 2
a controller operably coupled to the AC induction motor and capable of regulating an electrical power output from the AC induction motor
Implementation Method 3
a battery source capable of storing electrical energy and selectively outputting electrical energy and selectively receiving electrical energy
Data Source
AI summary
A power generation device for a utility vehicle having a battery source capable of storing electrical energy and selectively outputting electrical energy and selectively receiving electrical energy, a logic/driver module operably coupled to the battery source and capable of outputting power to a drive system of the utility vehicle, an internal combustion engine capable of outputting a mechanical driving force in response to a control input from the logic/driver module, and an AC induction motor operably coupled to the internal combustion engine via a coupler and electrically coupled to the logic/driver module. The AC induction motor is capable of operating as a generator in response to the mechanical driving force of the internal combustion engine, thereby outputting electrical energy to the logic/driver module, and further is capable of operating as an electric motor in response to input of electrical energy from the logic/driver module.