Electromechanical Brake Energy Recycling Circuit for Back-EMF Control
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Solution Overview
Problem
Existing electromechanical brake systems face issues with back electromotive force accumulation during reverse motor rotation, leading to potential circuit overvoltage damage and increased energy consumption due to inefficient energy recycling.
Innovation Solution
An electromechanical brake system incorporating a capacitor-based power source and an energy recycling circuit with a unidirectional conduction element and voltage regulating elements, which recovers energy generated during brake release and limits recharge current to prevent overvoltage, featuring a protective switch assembly to control power flow and manage energy recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor rotates in reverse direction to release brake force, then the brake system can be released, but back electromotive force accumulates causing overvoltage damage risk
Solution Approach 1:
The patent converts the harmful back electromotive force generated during motor reverse rotation into useful energy by directing it through a rectifier circuit to charge the capacitor-based power source. The energy recycling circuit includes a diode bridge rectifier that converts the reverse EMF into usable electrical energy, transforming what was previously a harmful overvoltage risk into a beneficial energy recovery mechanism that extends system operation time and reduces energy consumption.
Solution Approach 2:
The patent introduces an energy recycling circuit as an intermediary component between the motor and the power source. This circuit includes voltage regulation elements and protection devices that mediate the energy flow during motor reverse rotation, preventing direct overvoltage damage to the control system while enabling safe energy recovery. The intermediary circuit manages the transition of energy from the motor back to the power source.
2Productivity
If the motor rotates in reverse direction repeatedly during multiple brake actions, then braking function is maintained, but energy consumption increases due to lack of energy recycling
Solution Approach 1:
The patent implements energy recovery by capturing the back electromotive force that would otherwise be discarded during motor reverse rotation. The energy recycling circuit redirects this energy back to the capacitor-based power source, creating a closed-loop energy management system. This allows the brake system to perform multiple brake and release cycles while maintaining lower overall energy consumption, as each release phase replenishes the power source.
3Device complexity
If no energy recycling circuit is installed, then circuit structure is simpler, but back electromotive force causes overvoltage damage and energy loss
Solution Approach 1:
The patent introduces an energy recycling circuit as an intermediary component between the motor and the power source. This circuit includes voltage regulation elements and protection devices that mediate the energy flow during motor reverse rotation, preventing direct overvoltage damage to the control system while enabling safe energy recovery. The intermediary circuit manages the transition of energy from the motor back to the power source.
Solution Approach 2:
The patent converts the harmful back electromotive force generated during motor reverse rotation into useful energy by directing it through a rectifier circuit to charge the capacitor-based power source. The energy recycling circuit includes a diode bridge rectifier that converts the reverse EMF into usable electrical energy, transforming what was previously a harmful overvoltage risk into a beneficial energy recovery mechanism that extends system operation time and reduces energy consumption.
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 solution effectively prevents overvoltage damage and reduces energy consumption by recycling energy back to the capacitor-based power source, enhancing the safety and efficiency of the electromechanical brake system.
Implementation Method 1
The energy recycling circuit comprises a unidirectional conduction element
Implementation Method 2
The energy recycling circuit comprises a unidirectional conduction element and/or a voltage regulating element
Implementation Method 3
a capacitor-based power source and at least one electric brake device. The electric brake device comprises a motor that acquires electric power from the capacitor-based power source
Implementation Method 4
A reverse electromotive force may be generated when the motor rotates in a reverse direction
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
The present invention relates to electromechanical brake technology, and more particularly to an electromechanical brake system. The electromechanical brake system comprises a capacitor- based power source and at least one electric brake device. The electric brake device comprises a motor that acquires electric power from the capacitor-based power source via a power supply main circuit to generate a braking force. The electromechanical brake system further comprises an energy recycling circuit connected in parallel to the power supply main circuit. The energy recycling circuit comprises a unidirectional conduction element and/or a voltage regulating element. When the brake force is reduced or the brake is at least partially released in response to a braking demand, the motor generates energy which is returned to the capacitor-based power source via the energy recycling circuit. The present invention may avoid an accumulation of a back electromotive force generated when the motor rotates in a reverse direction, thereby avoiding a hidden danger of circuit overvoltage damage and reducing energy consumption of the electromechanical brake system.