Rotary Machine Regulating Module for Stable Batteryless Operation
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Solution Overview
Problem
Conventional regulating modules for rotary electric machines are not robust enough in batteryless operating mode, leading to under-voltage or over-voltage faults due to time delays caused by differences in operating frequencies, especially during minor load conditions.
Innovation Solution
The regulating module operates in a battery-disconnected mode by generating intermediate setpoints for the rotor and stator based on power potential and rotor speed, independent of control power or torque, and output voltage, ensuring constant energization current and direct regulation of stator current, respectively, to maintain stable power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the regulating module uses conventional regulation methods in batteryless mode, then the machine can operate without battery connection, but time delays cause under-voltage or over-voltage faults and synchronization issues
Solution Approach 1:
The patent applies dynamics by making the regulation frequency adaptive rather than fixed. The stator module operates at a higher frequency than the rotor module, and the regulation frequency is dynamically adjusted based on operating conditions. This dynamic frequency adjustment eliminates time delays and synchronization issues while maintaining reliable voltage regulation in batteryless mode.
Solution Approach 2:
The patent changes the parameter of operating frequency from a conventional uniform frequency to differentiated frequencies for rotor and stator modules. The stator module operates at a higher frequency to respond quickly to load variations, while the rotor module operates at a lower frequency. This parameter change resolves the time delay problem and prevents voltage faults.
2Speed
If the regulating module operates at high frequency to respond to load variations, then voltage regulation improves, but time delays and synchronization issues occur with conventional multi-module architecture
Solution Approach 1:
The patent implements dynamic frequency assignment where the stator module operates at a higher frequency to achieve fast response to load variations, while the rotor module operates at a lower frequency. This dynamic differentiation eliminates synchronization conflicts and time delays that would occur with uniform high-frequency operation in conventional multi-module systems.
Solution Approach 2:
The patent segments the regulation function into independent rotor and stator modules with different operating frequencies. The stator module handles high-frequency responses to load variations, while the rotor module handles lower-frequency control. This segmentation allows each module to operate optimally without causing synchronization issues.
3Device complexity
If the regulating module uses conventional regulation in batteryless mode, then the machine structure remains simple, but under-voltage or over-voltage faults occur during minor load conditions
Solution Approach 1:
The patent introduces dynamic frequency differentiation between rotor and stator modules, with the stator module operating at a higher frequency to quickly respond to minor load variations. This dynamic approach prevents under-voltage or over-voltage faults during batteryless operation while maintaining a relatively simple module structure without requiring complex additional hardware.
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 enhances the robustness of the batteryless operating mode by better accommodating load variations and preventing synchronization issues, resulting in improved voltage regulation and reliable power supply.
Implementation Method 1
In alternator mode, when the rotor is rotating, it induces a magnetic field at the stator, which converts it into electric current
Implementation Method 2
In motor mode, the stator is electrically powered and induces a magnetic field causing the rotor to rotate
Data Source
AI summary
A regulating module for a rotary electric machine having an operating mode in which a battery of the vehicle is disconnected. The regulating module includes a rotor module and a stator module. The rotor module is arranged to generate a first intermediate setpoint (I_RotRef) on the basis of which is generated the first output quantity (V_Rot) for controlling the rotor, said first intermediate setpoint being determined on the basis of a power potential reference signal (Pdc_MaxRef) and of a speed of rotation (W) of the rotor and being independent of a power or of a control torque of the machine. The stator module is arranged to generate a second intermediate setpoint on the basis of which is generated the second output quantity for controlling the stator, said second intermediate setpoint being determined on the basis of the output voltage of the machine.