Brushless two-pole generator main field leads connection to rectifier assembly

• US 5,136,195 A
• Filed: 08/21/1990
• Issued: 08/04/1992
• Est. Priority Date: 08/21/1990
• Status: Expired due to Term

• Current Assignee: Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Shahamat, Mohammed F., Allen, Frank W. III, Hernden, Michael R.
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): HASZKO, DENNIS
• Application Number:
  US07/570,558
• Time in Patent Office: 714 Days
• Field of Search: 310/71, 310/68 D, 310/68 R, 363/141, 363/144, 363/145
• US Class Current: 310/68.00D
• CPC Class Codes: H02K 11/042 Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts
• CPC Class Codes: H02K 3/527 applicable to rotors only

Abstract

An electric generator and a method of securing a connection between flexible electrical leads from a rectifier and a main field winding in a rotor of the generator wherein the leads are arranged so that they extend through a generally axially extending hole in the rotor with their free ends being connected in a parallel splice configuration which extends radially outward from the hole with the connected free ends being secured with respect to the rotor so as to remain in the radially outward extending position during rotation of the rotor. The rectifier is located at one end of the magnetic core and field winding of the main generator with the rectifier leads extending through a hole in the magnetic core and a field winding insulator to the opposite end of the magnetic core and field winding for connection with the field winding leads. Rotational forces will not pull the lead wire connections apart and the connections are readily accessible for repair.

Claims

1. An electric generator comprising an exciter and a main generator, said exciter and said main generator having a common rotor;

means for rotatably supporting said rotor for rotation about an axis of the rotor, said rotor including a magnetic core and field winding of the main generator;

an exciter winding and a rectifier for rectifying the electrical output of the exciter winding for transmission to the field winding of the main generator, said exciter winding and said rectifier being located in said rotor to one side of the magnetic core and the field winding of the main generator in a direction along the axis of rotation of the rotor; and

wherein electrical leads from said rectifier extend through a hole in said rotor to the other side of said magnetic core and field winding opposite said one side of the magnetic core and field winding of the main generator where the electrical leads form said rectifier are connected to respective leads from said field windings thereby forming electrical connections, wherein the field winding leads and the rectifier leads are arranged in parallel splice configurations in the locations of the electrical connections, the lead ends of the field winding leads and the rectifier leads in the parallel splice configurations extending radially outward from the hole with respect to said axis of rotation of the rotor whereby rotation forces will not pull the electrical connections apart.

2. A generator according to claim 1 wherein said hole in same motor extends along the axis of rotation of said rotor from one side of the core and field winding to the other.

3. A generator according to claim 1, wherein a field winding insulator is provided over the field winding at least adjacent said other side of the magnetic core and field winding, the electrical connections of the field winding leads and the rectifier leads being located adjacent said field winding insulator.

4. A generator according to claim 3, wherein said insulator includes means for securing the connected ends of the electrical leads from the rectifier adjacent the insulator.

5. A generator according to claim 4, wherein said means for securing includes holes in the insulator and ties extending through the holes in the insulator and about said leads for securing the ends of the electrical leads from the rectifier and the field winding adjacent the insulator.

6. A generator according to claim 3, wherein the hole in said rotor extends through said insulator adjacent said other side of the magnetic core and field winding, both said rectifier leads and said field winding leads extending through the hole in said insulator to the electrical connections whereby the electrical connections are accessible from the axial end of said magnetic core and field winding of the generator.

7. A generator according to claim 1, wherein the electrical connections are each made by soldering, brazing, crimping or with the use of a compressive device such as a screw terminal.

8. A generator according to claim 1, wherein said generator is a brushless two-pole generator.

9. A generator according to claim 1, wherein said means for rotatably supporting the rotor comprises spaced bearings which support the rotor, and wherein said magnetic core and said field winding are located within an external sleeve of the rotor which transmits torsion along the rotor and gives support between said bearings while the shaft is rotating.

10. A generator according to claim 1, wherein said hole in the rotor extends through said magnetic core.

11. A method of securing a connection between at least two flexible electrical leads of electrical components of a rotor which is rotatable about an axis of the rotor, comprising the step of arranging the leads so that they extend through a generally axially extending hole in the rotor with their free ends being connected in a parallel splice configuration of the ends which extends radially outward from the hole, and wherein said method further comprises the step of securing the connected free ends with respect to said rotor so as to remain in said radially outward extending position during rotation of the rotor.

12. A method according to claim 11, wherein said electrical components include a rectifier and a main generator field winding, and wherein said step of arranging includes extending the electrical leads from the rectifier and the field winding through said generally axially extending hole in the rotor.

13. A method according to claim 12, wherein said rotor further includes a field winding insulator over at least one end of the field winding, said hole extending through the insulator, and wherein the step of securing includes securing the connected free ends of the leads to said insulator.

14. A method according to claim 12, wherein said electrical components further comprise a generator core about which said field winding is wound, said rectifier being located on one side of the generator core and field winding along the axis of the rotor and said hole extending through said generator core from said one side to the opposite side thereof, and wherein said step of arranging further includes extending flexible electrical leads from the rectifier completely through the generator core and connecting them to flexible electrical leads of said winding.