Rotary Electric Machine Output Control via Dynamic Temperature Limits
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Solution Overview
Problem
Existing control apparatuses for rotary electric machines face challenges in increasing output without excessive part rating, leading to temperature-related issues and limitations in output control.
Innovation Solution
A control apparatus that acquires temperature data from the battery and wiring, calculates an allowable output value based on temperature, and transmits this value to set an output upper limit, allowing for increased output while preventing excessive temperature rise, using temperature estimation and prediction to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the output of the rotary electric machine is increased to improve productivity, then the output power increases, but the temperature of parts such as battery and wiring increases excessively
Solution Approach 1:
The patent implements dynamic temperature management by continuously monitoring battery and wiring temperatures, and adjusting the output power limits in real-time based on actual temperature conditions. This allows the system to operate at higher outputs when temperatures are acceptable and reduce output when temperature thresholds are approached, resolving the contradiction between maximizing productivity and controlling temperature.
Solution Approach 2:
The system changes operational parameters (output power limits) based on temperature measurements. By establishing temperature-dependent output limits and dynamically adjusting these limits as temperatures change, the system can safely operate at higher outputs when conditions permit while preventing excessive temperature rise, thus resolving the productivity-temperature contradiction.
2Temperature
If the capability of each part is increased to suppress temperature rise, then temperature control improves, but the apparatus size and costs increase
Solution Approach 1:
The patent implements a self-regulating system where the control apparatus continuously monitors temperature conditions and automatically adjusts output power limits without requiring additional cooling infrastructure or oversized components. The system uses its existing sensors and control mechanisms to self-manage temperature, avoiding the need for increased apparatus size while maintaining effective temperature control.
Solution Approach 2:
The system employs feedback control by monitoring temperature measurements from sensors and using this information to dynamically adjust output power limits. This feedback mechanism enables effective temperature management using the existing apparatus components, eliminating the need to increase part sizes or add substantial cooling infrastructure.
3Temperature
If the capability of each part is increased to suppress temperature rise, then temperature control improves, but the costs increase
Solution Approach 1:
The control apparatus uses existing system components (temperature sensors, control logic) to self-manage temperature conditions by dynamically adjusting output power limits. This approach avoids the need for expensive additional cooling systems or oversized components, achieving effective temperature control without increasing manufacturing costs.
Solution Approach 2:
By implementing feedback control that uses temperature sensor data to dynamically adjust output power limits, the system achieves effective temperature management using existing infrastructure. This eliminates the need for expensive additional hardware or oversized components, maintaining cost-effectiveness while improving temperature control.
Data Source
AI summary
A system includes a rotary electric machine, wiring, a battery that is connected to the rotary electric machine by the wiring, and an upper limit value setting section which sets an output upper limit value that is an upper limit of an output command for the rotary electric machine. A control apparatus which controls the rotary electric machine is provided with a temperature acquisition section which acquires the temperature of at least one of the battery and the wiring, an allowable output value calculation section which calculates an allowable output value that is the upper limit allowed for the output command of the rotary electric machine, based on the temperature that is acquired by the temperature acquisition section, and a transmitting section which transmits the allowable output value calculated by the allowable value calculation section to the upper limit value setting section.