Electrically Excited Motor Drive and DAB OBC Circuit Reuse
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Solution Overview
Problem
The existing electric vehicle systems face increased circuit complexity and costs due to the separate disposition of power supply and charging circuits, which cannot be integrated effectively.
Innovation Solution
An electrically excited motor drive system integrated with an on-board charger (OBC) that includes a power factor correction circuit, multiple electric energy conversion circuits, a transformer, a switch circuit, and a control component, allowing the system to switch between power supply and charging functions, thereby integrating the power supply circuit with the charging circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply circuit and charging circuit are separately disposed in the electric vehicle, then the reliability and independence of each circuit are improved, but the circuit complexity and design production costs increase greatly
Solution Approach 1:
The patent combines the power supply circuit and charging circuit into a single integrated circuit system. The power factor correction circuit, voltage conversion circuits, and control units are shared between both functions, reducing the number of separate components while maintaining circuit reliability through unified design and control.
Solution Approach 2:
The integrated circuit is designed to perform multiple functions: it can operate as a power supply circuit to drive the motor, as a charging circuit to charge the battery, and as a bidirectional converter. The same hardware components serve both power supply and charging purposes, reducing overall system complexity.
2Adaptability or versatility
If the power supply circuit and charging circuit are separately disposed in the electric vehicle, then the functional independence of each circuit is maintained, but the design and production costs increase
Solution Approach 1:
By merging the power supply and charging circuits into one integrated system, the patent reduces the total number of components, assembly steps, and testing procedures required during manufacturing. This consolidation directly lowers production costs while maintaining both power supply and charging functionalities.
Solution Approach 2:
The integrated circuit provides universal functionality for both power supply and charging operations, eliminating the need for separate dedicated circuits. This multi-functionality reduces design complexity and manufacturing overhead, making the production process more cost-effective.
3Adaptability or versatility
If separate power supply circuit and charging circuit are used, then the system can independently perform power supply and charging functions, but the circuit complexity increases
Solution Approach 1:
The patent implements a universal integrated circuit that can adaptively switch between power supply mode, charging mode, and bidirectional power flow. The same hardware architecture supports multiple operational modes, providing system versatility without increasing circuit complexity through separate dedicated circuits.
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 integration reduces circuit complexity and costs, enhances system flexibility, and improves user experience by sharing components between power supply and charging functions, specifically enabling the reuse of circuits for both driving the electric motor and charging the vehicle.
Implementation Method 1
a first transformer, where a first terminal of the first transformer is electrically connected to the second terminal of the first voltage conversion circuit
Data Source
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AI summary
This application provides an electrically excited motor drive system integrated with an on-board charger OBC, so that a power supply circuit that is in an electric vehicle and that is configured to drive an electrically excited motor can be integrated with an OBC of a DAB type. Therefore, when a control component controls a switch circuit, the electrically excited motor drive system obtained after integration can separately implement a function of the power supply circuit or a function of the charging circuit in different working modes. In addition, when the electrically excited motor drive system is in different working modes, some circuits are further reused through time division. Therefore, this resolves a problem that the power supply circuit cannot be integrated with the OBC of the DAB type, to reduce circuit complexity and costs of the electric vehicle.