Bipolar Relay With Common Magnetic Drive
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Solution Overview
Problem
Existing solutions for switching two circuits are complex and susceptible to external magnetic influences, which can cause unauthorized changes in the switching status.
Innovation Solution
A 2-pole relay design utilizing two 1-pole relay contact devices with a common magnetic drive positioned between them, allowing for synchronous switching with reduced external magnetic interference, and optionally equipped with a shunt for current measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate magnetic drives are used for switching two circuits, then each circuit can be switched independently, but the device complexity and susceptibility to external magnetic influences increase
Solution Approach 1:
The patent combines two separate magnetic drives into a single common magnetic drive that controls both relay contact devices. The magnetic drive includes a single magnetic coil and a common armature that simultaneously actuates both contact devices, reducing the number of components and minimizing external magnetic field interference while maintaining independent switching capability for each circuit.
Solution Approach 2:
The relay is divided into two separate 1-pole relay contact devices that are spatially separated and spaced apart from each other. Each contact device has its own contacts and contact springs, but they share a common magnetic drive mechanism. This segmentation allows independent circuit switching while using a unified drive system.
2Object-affected harmful factors
If the magnetic coil is positioned outside the contact devices, then the structure is simpler, but external magnetic fields can cause unauthorized changes in switching status
Solution Approach 1:
The magnetic coil is nested between the two relay contact devices, with the contact devices positioned on either side of the coil. This nested arrangement places the coil in a protected position where it is shielded from external magnetic fields by the ferromagnetic materials of the contact devices, while still maintaining magnetic coupling with the common armature for actuation.
3Reliability
If contact springs are used to close or break the circuit, then the switching function is achieved, but the contact springs may bounce causing unstable switching
Solution Approach 1:
The patent incorporates damping elements or cushioning mechanisms in the contact spring design to reduce bouncing and oscillations during switching. The contact springs are pre-configured with appropriate preloads and damping characteristics to ensure stable contact closure and prevent bouncing, thereby improving switching reliability.
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 design simplifies the switching of two circuits while minimizing external magnetic field influence on the switching status, ensuring reliable and stable operation.
Implementation Method 1
a magnetic drive for synchronously deflecting the contact springs of the two 1-pole relay contact devices into the respective relay position
Implementation Method 2
a permanent magnet of an H-type armature, which is held pivotably on two yoke legs of a magnetic coil. When the poles of the magnetic coil are reversed, the permanent magnet pivots
Data Source
AI summary
The relay (1) has two single-pole relays (2) including a contact spring (5) that connects or disconnects relay contacts (3, 4). One end of the contact spring is connected with the contact (3). An electric circuit is closed in a relay position of the spring or disconnected in another relay position of the spring over another free end (6) of the spring. A magnetic drive (8) synchronously moves the spring into the respective relay position. The single-pole relays are spaced apart from each other in a movement direction of the spring, where the drive is arranged between the single-pole relays.