Latching magnetic relay assembly with a linear motor

• US 6,046,660 A
• Filed: 04/07/1999
• Issued: 04/04/2000
• Est. Priority Date: 04/07/1999
• Status: Expired due to Term

• Current Assignee: Xiamen Hongfa Electric Power Controls Co., Ltd
• Original Assignee: K.G. Components, Inc.
• Inventors: Gruner, Klaus A.
• Primary Examiner(s): Donovan, Lincoln
• Assistant Examiner(s): Nguyen, Tuyen T.
• Application Number:
  US09/287,469
• Time in Patent Office: 363 Days
• Field of Search: 335/78-86, 335/128, 335/132
• US Class Current: 335/78
• CPC Class Codes: H01H 2051/2218 having at least one movable permanent magnet
• CPC Class Codes: H01H 50/546 for contactors having bridging contacts
• CPC Class Codes: H01H 51/2209 with rectilinearly movable armature
• CPC Class Codes: H01H 51/2227 in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit H01H51/2209 takes precedence

Abstract

The present invention is a latching magnetic relay capable of transferring currents of greater than 100 amps for use in regulating the transfer of electricity or in other applications requiring the switching of currents of greater than 100 amps. A relay motor assembly has an elongated coil bobbin with an axially extending cavity therein. An excitation coil is wound around the bobbin. A generally U shaped ferromagnetic frame has a core section disposed in and extending through the axially extending cavity in the elongated coil bobbin. Two contact sections extend generally perpendicularly to the core section and rises above the motor assembly. An actuator assembly is magnetically coupled to the relay motor assembly. The actuator assembly is comprised of an actuator frame operatively coupled to a first and a second generally U-shaped ferromagnetic pole pieces, and a permanent magnet. A contact bridge made of a sheet of conductive material copper is operatively coupled to the actuator assembly.

Claims

1. A latching magnetic relay assembly comprising:

a relay motor assembly comprising an elongated coil bobbin having an axially extending cavity therein and an excitation coil wound therearound, a generally U shaped ferromagnetic frame, the ferromagnetic frame having a plurality of core sections being disposed in and extending through the axially extending cavity in the elongated coil bobbin and a first and second contact sections extending generally perpendicularly to the core section and rising above the motor assembly;

an actuator assembly comprising an actuator frame operatively coupled to a first and a second generally U-shaped ferromagnetic pole pieces, and a permanent magnet, the first pole piece mounted in overlapping relation over the second pole piece, the permanent magnet lying sandwiched therebetween, the actuator assembly positioned so the second pole piece is located in between the first and second contact sections of the ferromagnetic frame and the first pole piece is located in overlapping relation across from the two contact sections of the relay motor, the first and second pole pieces magnetically coupled to opposite contact sections; and

a contact bridge assembly, the contact bridge assembly comprising a contact bridge and a spring, the contact bridge of a conductive material and operatively coupled to the actuator assembly, the spring connected to the contact bridge, the movement of the actuator assembly either driving the contact bridge into contact with a pair of contact points positioned directly opposite the contact bridge, the contact bridge serving as a conductive pathway between the two contact points, or driving the contact bridge into breaking contact with the contact points, the movement of the actuator assembly driven by the relay motor.

2. The magnetic latching relay in claim 1 wherein the contact bridge is made of copper and has a width of 10 millimeters and a thickness of 1 millimeter.

3. The magnetic latching relay in claim 1 wherein a plurality of contact bridges and springs are operatively coupled to the actuator assembly.

4. The magnetic latching relay in claim 1 wherein a plurality of contact buttons are conductively connected to the contact bridge.

5. The magnetic latching relay in claim 1 further comprising a housing with a plurality of contact terminal assemblies attached thereto and extending through a wall of the housing, the relay motor, the actuator assembly, and the contact bridge being disposed within the housing, the contact terminal assembly having two isolated contact points positioned across the contact bridge, a gap of at least 1.6 mm separating the contact bridge and each contact point.

6. A magnetic relay assembly comprising:

a relay motor comprising a bobbin having an axially extending cavity therethrough and a conductive coil wound therearound, a generally U-shaped ferromagnetic frame having a core section disposed in and extending through the axially extending cavity in the bobbin, and having a first and a second contact section extending generally perpendicularly from opposite ends of the core section and rising above the bobbin, the first contact section having a first tongue portion extending generally perpendicularly from the first contact section and above the bobbin, the second contact section having a second and third tongue portions extending generally perpendicularly from the second contact section and above the bobbin, the second tongue portion lying below the third tongue portion;

an actuator assembly comprising an actuator frame operatively coupled to a first and a second ferromagnetic pole pieces, and a permanent magnet, the permanent magnet lying sandwiched in between the pole pieces, the actuator assembly positioned so a portion of the first and second pole pieces are located in between the second and third tongue portion on the second contact sections and the first tongue portion of the first contact section is positioned in between the first and second pole pieces, the first and second pole pieces magnetically coupled to opposing contact sections; and

a contact bridge assembly, the contact bridge assembly comprising of a contact bridge and a spring, the contact bridge of a conductive material and operatively coupled to the actuator assembly, the spring connected to the contact bridge, the movement of the actuator assembly either driving the contact bridge into contact with a pair of contact points positioned directly opposite the contact bridge, the contact bridge serving as a conductive pathway between the two contact points, or driving the contact bridge into breaking contact with the contact points, the movement of the actuator assembly initiated by the relay motor.

7. The magnetic latching relay in claim 6 wherein the contact bridge is made of copper and has a width of 10 millimeters and a thickness of 1 millimeter.

8. The magnetic latching relay in claim 6 wherein a plurality of contact bridges and spring are operatively coupled to the actuator assembly.

9. The magnetic latching relay in claim 6 wherein a plurality of contact buttons are conductively connected to the contact bridge.

10. The magnetic latching relay in claim 6 further comprising a housing with a plurality of contact terminal assemblies attached thereto and extending through a wall of the housing, the relay motor, the actuator assembly, and the contact bridge being disposed within the housing, the contact terminal assemblies having two conductively isolated contact points positioned across the contact bridge so a gap of at least 1.6 mm separates the contact bridge and each contact point.

11. A latching magnetic relay assembly comprising:

a relay motor;

an actuator assembly magnetically coupled to the relay motor; and

a contact bridge assembly, the contact bridge assembly comprising of a contact bridge and a spring, the contact bridge of a conductive material and operatively coupled to the actuator assembly, the spring connected to the contact bridge, the movement of the actuator assembly either driving the contact bridge into contact with a pair of contact points positioned directly opposite the contact bridge, the contact bridge serving as a conductive pathway between the two contact points, or driving the contact bridge into breaking contact with the contact points, the movement of the actuator assembly initiated by the relay motor.

12. The magnetic latching relay in claim 11 wherein the contact bridge is made of copper and has a width of 10 millimeters and a thickness of 1 millimeter.

13. The magnetic latching relay in claim 11 wherein a plurality of contact bridges are operatively coupled to the actuator assembly.

14. The magnetic latching relay in claim 11 wherein a plurality of contact buttons are conductively connected to the contact bridge.

15. The magnetic latching relay in claim 11 further comprising a housing with a plurality of contact terminal assemblies attached thereto and extending through a wall of the housing, the relay motor, the actuator assembly, and the contact bridge being disposed within the housing, the contact terminal assembly having two conductively isolated contact points positioned across the contact bridge so a gap of at least 1.6 mm separates the contact bridge and each contact point.

16. A latching magnetic relay assembly comprising:

a relay motor assembly comprising an elongated coil bobbin having an axially extending cavity therein and an excitation coil wound therearound, a generally U shaped ferromagnetic frame, the ferromagnetic frame having a plurality of core sections being disposed in and extending through the axially extending cavity in the elongated coil bobbin and a first and a second contact section extending generally perpendicularly to the core section and rising above the motor assembly;

an actuator assembly comprising an actuator frame operatively coupled to a first and a second generally U-shaped ferromagnetic pole pieces, and a permanent magnet, the first pole piece mounted in overlapping relation over the second pole piece, the permanent magnet lying sandwiched therebetween, the actuator assembly positioned so the second pole piece is located in between the first and second contact sections of the ferromagnetic frame and the first pole piece positioned in overlapping relation across from the two contact sections of the relay motor, the first and second pole pieces magnetically coupled to opposite contact sections; and

means for conductive contact, the means for conductive contact operatively coupled to the actuator assembly, the movement of the actuator assembly either driving the means for conductive contact into contact with a pair of contact points positioned directly opposite the means for conductive contact, the means for conductive contact acting as a conductive pathway between the two contact points, or driving the means for conductive contact into breaking contact with the contact points, the movement of the actuator assembly initiated by the relay motor.

17. The magnetic latching relay in claim 16 wherein a plurality of means for conductive contact are operatively coupled to the actuator assembly.

18. The magnetic latching relay in claim 16 further comprising a housing with a contact terminal assembly attached thereto and extending through a wall of the housing, the relay motor, the actuator assembly, and the conductive contact means disposed within the housing, the contact terminal assembly having two conductively isolated contact points positioned across the means for conductive contact so a gap of at least 1.6 mm separates the means for conductive contact and each contact point.

19. The magnetic latching relay in claim 16 wherein a plurality of contact buttons are conductively connected to the means for conductive contact.

20. A magnetic relay assembly comprising:

a relay motor comprising a bobbin having an axially extending cavity therethrough and a conductive coil wound therearound, a generally U-shaped ferromagnetic frame having a plurality of core sections disposed in and extending through the axially extending cavity in the bobbin, and having a first and a second contact section extending generally perpendicularly from opposite ends of the core section and rising above the bobbin, the first contact section having a first tongue portion extending generally perpendicularly from the first contact section and above the bobbin, the second contact section having a second and third tongue portions extending generally perpendicularly from the second contact section and above the bobbin, the second tongue portion lying below the third tongue portion;

an actuator assembly comprising an actuator frame operatively coupled to a first and a second ferromagnetic pole pieces, and a permanent magnet, the permanent magnet lying sandwiched in between the pole pieces, the actuator assembly positioned so a portion of the first and second pole pieces are located in between the second and third tongue portion on the second contact sections and the first tongue portion of the first contact section positioned in between the first and second pole pieces, the first and second pole pieces magnetically coupled to opposing contact sections; and

means for conductive contact, the means for conductive contact operatively coupled to the actuator assembly, the movement of the actuator assembly either driving the means for conductive contact into contact with a pair of contact points positioned directly opposite the conductive contact means, the means for conductive contact acting as a conductive pathway between the two contact points, or driving the means for conductive contact into breaking contact with the contact points, the movement of the actuator assembly being initiated by the relay motor.

21. The magnetic latching relay in claim 20 wherein a plurality of means for conductive contact are operatively coupled to the actuator assembly.

22. The magnetic latching relay in claim 20 further comprising a housing with a plurality of contact terminal assemblies attached thereto and extending through a wall of the housing, the relay motor, the actuator assembly, and the means for conductive contact being disposed within the housing, the contact terminal assembly having two conductively isolated contact points positioned across the means for conductive contact.

23. The magnetic latching relay in claim 20 wherein a plurality of contact buttons are conductively connected to the means for conductive contact.