Traction Boost Converter for Hybrid Energy Battery Charging
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Solution Overview
Problem
Dual battery systems in electric traction systems often rely on mechanical or grid-based methods for initial and supplemental charging of energy batteries, lacking an alternative efficient means for energy battery charging.
Innovation Solution
An apparatus and method utilizing a heat engine, alternator, rectifier, energy battery, and traction boost converter to generate and boost DC voltage for tractive effort, with a power battery and traction converter managing motor and braking operations, enabling efficient energy storage and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical or grid-based methods are used for charging energy batteries, then the system can provide power for traction application, but the system lacks an alternative efficient means for energy battery charging
Solution Approach 1:
The traction system's electrical power production capability is utilized for multiple purposes: both for traction application and for charging energy batteries. The motor drive system serves dual functions of providing tractive effort and acting as a generator to recharge energy batteries during braking operation, eliminating the need for separate charging infrastructure.
Solution Approach 2:
The system charges its own energy batteries using its own braking energy recovery capability. During braking operation, the motors operate as generators to re-charge both power and energy batteries, making the system self-sufficient for energy battery charging without external mechanical or grid-based charging methods.
2Adaptability or versatility
If the traction system's electrical power production capability is used for non-traction purposes, then additional opportunities are created, but the system complexity increases
Solution Approach 1:
The motor drive system performs multiple functions: it provides electrical power for traction motors, charges power batteries, charges energy batteries, and can supply electrical power for non-traction purposes. This multi-functional approach maximizes the utilization of braking energy recovery capability without requiring separate dedicated systems for each function.
Solution Approach 2:
The patent combines the charging functions for both power and energy batteries into a single integrated motor drive system. The same electrical power production capability serves multiple charging purposes and non-traction applications, reducing the need for separate dedicated charging systems and minimizing overall system complexity.
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 solution provides an efficient alternative for charging energy batteries and utilizes electrical power production for both traction and non-traction purposes, enhancing system efficiency and flexibility.
Implementation Method 1
a heat engine adapted for generating mechanical power by burning a fuel
Implementation Method 2
an alternator adapted for generating an alternating voltage from the mechanical power
Implementation Method 3
a rectifier adapted for rectifying the alternating voltage and producing a low DC voltage
Data Source
AI summary
An apparatus for producing tractive effort, the apparatus comprising: an energy source adapted for generating a high DC voltage; a motor drive adapted for generating a motor voltage from the high DC voltage; and a motor adapted for producing the tractive effort from the motor voltage, the energy source comprising: a heat engine adapted for generating mechanical power by burning a fuel; an alternator adapted for generating an alternating voltage from the mechanical power; a rectifier adapted for rectifying the alternating voltage and producing a low DC voltage; an energy battery adapted for storing and delivering energy derived from the low DC voltage; and a traction boost converter adapted for boosting the low DC voltage to produce the high DC voltage, the motor drive comprising: a power battery adapted for storing energy and delivering power at the high DC voltage; and a traction converter adapted for generating the motor voltage from the high DC voltage during motoring operation and for generating the high DC voltage from the motor voltage during braking operation.