Dual-Coil Electromagnetic Brake for Low-Power Compact Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic brakes face challenges in reducing power consumption and volume due to increased control device requirements and energy consumption during buck-boost voltage control, especially as they become smaller and thinner for use in miniature robotic arms.
Innovation Solution
The design incorporates two winding coils with different resistance values and a control circuit that selectively drives them in series, reducing power consumption by alternating their operation in distinct periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the brake is reduced in size to fit miniature robotic arms, then the volume and thickness of the brake are reduced, but the braking force generation capability decreases
Solution Approach 1:
The single winding coil is segmented into two separate winding coils with different resistance values. The first winding coil has a first resistance value and the second winding coil has a second resistance value greater than the first. This segmentation allows the system to use different coils for different operating conditions, enabling sufficient braking force in a compact structure by selecting the appropriate coil resistance based on the required braking performance.
2Force
If buck-boost voltage control is used to increase actuation force, then the braking force is improved, but the number of control devices increases and cost increases
Solution Approach 1:
Instead of using complex buck-boost voltage control circuits, the invention changes the electrical parameter approach by providing two winding coils with different resistance values. The control circuit selectively activates either the first winding coil or the second winding coil based on the required braking force, thereby achieving variable actuation force without requiring complex voltage boosting circuitry, reducing device complexity and cost.
3Force
If buck-boost voltage control is used to increase actuation force, then the braking force is improved, but energy consumption increases
Solution Approach 1:
The control circuit dynamically selects which winding coil to activate based on the instantaneous braking requirements. By switching between the first winding coil (lower resistance) and the second winding coil (higher resistance), the system optimizes energy consumption by using the appropriate coil resistance for the required braking force, avoiding the continuous high-energy consumption associated with buck-boost voltage control.
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 effectively reduces power consumption and volume by maintaining magnetic attraction force while minimizing energy retention, thus optimizing energy efficiency and compactness.
Implementation Method 1
the first winding coil is disposed inside the base, wherein the first winding coil has a first resistance value. The second winding coil is disposed inside the base and disposed around the first winding coil
Data Source
AI summary
An energy-saving electromagnetic brake includes a base, a first winding coil, a second winding coil, and a control circuit component. The first winding coil is disposed inside the base, wherein the first winding coil has a first resistance value. The second winding coil is disposed inside the base and is disposed around the first winding coil, wherein the second winding coil has a second resistance value, and the second resistance value is greater than the first resistance value. The control circuit component is disposed inside the base and is electrically connected to the first winding coil and the second winding coil. In a first period, the control circuit component drives the first winding coil. In a second period, the control circuit component simultaneously drives the first winding coil and the second winding coil, and the first winding coil and the second winding coil are connected in series.