Motor Drive Regenerative Braking for Local Controller Power
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Solution Overview
Problem
Motor drive systems experience energy loss during braking operations due to heat dissipation, which reduces efficiency.
Innovation Solution
A motor drive system that utilizes regenerative energy to charge an energy storage device, which supplies electrical energy to the controller, minimizing energy loss and improving efficiency by using locally stored energy during braking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If regenerative energy is captured during braking operation, then energy loss is reduced, but the energy storage device may reach full capacity and require energy dissipation
Solution Approach 1:
The patent converts the harmful energy that would normally be dissipated as heat during braking into useful electrical energy by operating the motor as a generator. This regenerative energy is then stored in the energy storage device for later use, transforming a waste product into a valuable resource that reduces overall energy loss and improves system efficiency
Solution Approach 2:
The patent dynamically changes the operating parameters of the motor, switching between motor mode and generator mode depending on system needs. During braking, the motor operates in generator mode with altered electrical parameters to generate regenerative energy, while the energy management system adjusts charging parameters based on the energy storage device's state of charge
2Reliability
If the energy storage device is charged to full capacity by the second energy source, then the controller has sufficient power supply, but regenerative energy cannot be stored during braking operation
Solution Approach 1:
The patent implements dynamic energy management where the charging state of the energy storage device is continuously monitored and the power source is dynamically switched. The system transitions between drawing power from the second energy source, storing regenerative energy, or using regenerative energy immediately based on real-time conditions, optimizing both reliability and energy recovery
Solution Approach 2:
The energy management system continuously monitors the charge level of the energy storage device and uses this feedback to control the charging process. When the device reaches a threshold charge level, the system automatically stops charging from the second energy source and enables regenerative braking, ensuring both reliable power supply and maximum energy recovery
3Duration of action of moving object
If regenerative energy is transmitted over long distances, then energy can be stored for later use, but transmission losses increase
Solution Approach 1:
The patent implements local energy storage and utilization by capturing regenerative energy directly at the motor location and storing it in a locally-connected energy storage device. This localizes the energy management function, eliminating the need for long-distance transmission and associated losses, while still providing energy availability for extended operational periods
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
The system effectively reduces energy loss during braking by using regenerative energy to charge an energy storage device, ensuring efficient power supply to the controller and minimizing transmission losses, thereby enhancing overall system efficiency.
Implementation Method 1
charge the energy storage device with regenerative energy from the motor
Data Source
AI summary
A motor drive system includes: a motor; a controller; a first energy source configured to supply electrical energy to the motor, a second, different energy source configured to supply electrical energy to the controller, and an energy storage device. The energy storage device is configured to supply the controller with electrical energy when there is a loss of energy from the second energy source. The motor drive system is configured to, during a braking operation, charge the energy storage device with regenerative energy from the motor.