Motor-Battery Cooperative Heating Control via Full-Bridge Coils
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Solution Overview
Problem
Existing control devices for electric power storage devices and electric motors in mobility applications face inefficiencies due to complex control configurations and the inability to coordinate temperature settings, leading to potential complications in cooperative control.
Innovation Solution
An electric apparatus with a rotary electric machine and an electric power control unit that adjusts electric power supply to coils based on temperature readings from temperature acquisition portions, switching between modes to manage heat generation differently for the electric power storage device and rotary electric machine, using magnetic coupling and phase control of coils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If independent heating control is applied to electric power storage device and electric motor separately, then each device can be heated individually, but control complexity increases and cooperative control becomes impossible
Solution Approach 1:
The patent combines the heating control of the electric power storage device and electric motor into a unified control system. The control unit coordinates both devices to operate in cooperative heating modes (first cooperative heating mode and second cooperative heating mode), where heat generation is distributed between the two devices based on predetermined strategies, thereby reducing control complexity while achieving effective temperature management.
Solution Approach 2:
The control unit is designed to perform multiple functions: it controls both the electric power storage device and electric motor independently and in cooperation, manages different heating modes (first cooperative heating mode, second cooperative heating mode), and adapts to various operational scenarios. This multi-functional design eliminates the need for separate control systems for each device.
2Temperature
If different heating methods are used for electric power storage device and electric motor, then each device can be optimized independently, but cooperative control cannot be performed and temperature settings cannot be appropriately coordinated
Solution Approach 1:
The patent implements dynamic control strategies where the heating distribution between the electric power storage device and electric motor changes based on operational conditions. The control unit can switch between first cooperative heating mode and second cooperative heating mode, dynamically adjusting the heat generation allocation to optimize performance while maintaining cooperative control capability.
Solution Approach 2:
The control unit monitors the operational states of both the electric power storage device and electric motor, and uses this feedback information to adjust the heating control strategy. By continuously adapting the control parameters based on real-time conditions, the system achieves appropriate temperature coordination while maintaining versatility in different operating scenarios.
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 approach allows for efficient temperature management of both devices, reducing current amplitude and optimizing heating, thereby enhancing energy efficiency and power savings.
Implementation Method 1
a rotary electric machine 16 (M) having a plurality of coils (for example, an α-phase first coil 23 (α1), an α-phase second coil 24 (α2), a β-phase first coil 33 (β1), and a β-phase second coil 34 (β2) in the embodiment)
Implementation Method 2
by controlling electric power supply of the plurality of coils in accordance with each temperature acquired by the first temperature acquisition portion and the second temperature acquisition portion, the electric power control unit switches between and performs a first mode in which a heat generation amount of the electric power storage device is larger than a heat generation amount of the rotary electric machine
Data Source
AI summary
An electric apparatus includes an electric power storage device, a rotary electric machine, an electric power control unit, a motor temperature sensor, and a battery temperature sensor. The rotary electric machine includes each coil. The electric power control unit includes a first full-bridge circuit and a second full-bridge circuit that are connected to both ends of each coil, and a third full-bridge circuit and a fourth full-bridge circuit that are connected to both ends of each coil. The electric power control unit controls electric power supply of each coil in accordance with the temperature acquired by each temperature sensor, and switches between and performs a first mode in which a heat generation amount of the electric power storage device is larger than a heat generation amount of the rotary electric machine and a second mode in which a heat generation amount of the electric power storage device is smaller than that of the first mode.