48V PoE Blind Actuator Without Voltage Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromechanical actuators for sun protection screens face challenges with energy efficiency and compactness when powered by POE technology, due to the need for voltage converters to accommodate 48V Ethernet connections, which increases complexity and reduces performance.
Innovation Solution
An electromechanical actuator with a synchronous motor using permanent magnets, designed to operate directly at 48V, eliminating the need for converters and optimizing electrical efficiency by reducing wire diameter and enhancing filling coefficient, while incorporating a compensation spring to minimize power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a converter is used to adapt 48V Ethernet power to motor voltage, then the actuator can be powered by PoE technology, but the device complexity and footprint increase
Solution Approach 1:
The invention extracts and eliminates the converter component from the actuator system by designing a motor that operates directly at 48V Ethernet power voltage. This removes the unnecessary intermediary device, reducing complexity while maintaining PoE compatibility.
Solution Approach 2:
The motor is designed with universal voltage compatibility to operate directly at 48V from Ethernet power injection, eliminating the need for voltage conversion. This multi-functional approach allows the motor to handle both the mechanical drive function and the voltage adaptation function simultaneously.
2Adaptability or versatility
If a converter is used to adapt voltage, then PoE power supply is enabled, but the actuator footprint increases
Solution Approach 1:
The converter component is completely removed from the actuator assembly, eliminating its volume and footprint. The motor is redesigned to operate natively at 48V, making the physical space previously occupied by the converter unnecessary.
3Adaptability or versatility
If a converter is used for voltage adaptation, then PoE power supply is enabled, but electrical efficiency decreases
Solution Approach 1:
The converter is removed from the system, eliminating the energy losses associated with voltage conversion. By operating the motor directly at 48V Ethernet power voltage, the system avoids conversion inefficiencies and achieves optimal electrical efficiency.
4Adaptability or versatility
If standard brushed DC motors are used at 48V, then PoE power supply is utilized, but heating at brushes and collectors increases
Solution Approach 1:
The invention replaces the mechanical brush and collector system with a brushless motor design. This substitution eliminates the friction and electrical contact issues that cause heating, while maintaining compatibility with 48V Ethernet power injection.
Solution Approach 2:
The motor uses permanent magnets in the rotor assembly, creating a composite structure that enables efficient 48V operation without brushes. This composite design with permanent magnets allows for direct 48V operation while avoiding the heating problems of traditional brushed motors.
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 provides a compact, efficient, and cost-effective actuator that can operate directly on 48V Ethernet power, reducing size and energy consumption, and optimizing electrical performance without the need for additional converters.
Implementation Method 1
the motor is a synchronous motor comprising a wound stator and a rotor with permanent magnets, the motor being adapted to operate directly under the voltage supplied by the Ethernet network
Implementation Method 2
Roller blind installations equipped with a pre-stressed compensation spring are known in the prior art. Such installations use the compensation spring to limit the forces required to raise the blind, by increasing the pre-stress of the spring during a blind deployment movement
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electromechanical actuator (2) for driving a movable closure or sun protection screen comprises a motor (8), a control board (6), a gear reduction assembly (12) and a connector (18) for connecting to a power supply source. According to the invention, the connector comprises eight electrical contacts, the connector being in particular an RJ45 connector, for supplying power to the actuator and transmitting data from an Ethernet network. The motor is a synchronous motor comprising a wound stator and a rotor with permanent magnets, the stator winding being designed to withstand a voltage of 46V to 57V, in particular a voltage of 48V.