Rotating resistor assemblies

Patent metadata

Field	Value
Publication number	US-10879772-B2
Application number	US-201916242930-A
Country	US
Kind code	B2
Filing date	Jan 8, 2019
Priority date	Jan 8, 2019
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A rotating resistor assembly for use in a rotating shaft of an electrical machine can include a first housing configured to contact the rotating shaft and be grounded to the rotating shaft. The first housing can include a first bus bar connection aperture configured to receive a first bus bar. The assembly can include a second housing configured to connect to the first housing. The second housing can be configured to be insulated from the rotating shaft and to be insulated from direct electrical connection with the first housing. The second housing can include a second bus bar connection aperture configured to receive a second bus bar. The assembly can include a suppression resistor disposed between the first housing and the second housing and in electrical communication with the first housing and the second housing to provide an electrical pathway between first housing and the second housing.

First claim

What is claimed is:

1. A rotating resistor assembly for use in a rotating shaft of an electrical machine, comprising:
a first housing configured to contact the rotating shaft and be grounded to the rotating shaft, the first housing comprising a first bus bar connection aperture configured to receive a first bus bar, wherein the first housing is made of metal;
a second housing configured to connect to the first housing, wherein the second housing is configured to be insulated from the rotating shaft and to be insulated from direct electrical connection with the first housing, the second housing comprising a second bus bar connection aperture configured to receive a second bus bar, wherein the second housing is made of metal and includes coating such that direct contact with the shaft does not electrically connect the shaft to the second housing, wherein the first housing is uncoated; and
a suppression resistor disposed between the first housing and the second housing and in electrical communication with the first housing and the second housing to provide an electrical pathway between first housing and the second housing.

2. The assembly of claim 1 , wherein the first housing is made of aluminum.

3. The assembly of claim 1 , wherein the metal is aluminum and the coating is a dielectric.

4. The assembly of claim 1 , further comprising an insulating washer disposed between and in contact with the first housing and the second housing to at least provide abrasion resistance to protect the coating of the second housing.

5. The assembly of claim 4 , wherein the insulating washer is made of polyimide film.

6. The assembly of claim 1 , wherein the second housing includes a radial aperture defined from a center of the second housing to an outer surface of the second housing.

7. The assembly of claim 6 , wherein the first housing includes a tab extending axially therefrom, wherein the tab defines the first bus bar connection aperture and is configured to insert into the radial aperture of the second housing to axially align the first bus bar connection aperture and the second bus bar connection aperture.

8. The assembly of claim 1 , wherein the suppression resistor is at least partially encased within the first housing and the second housing.

9. The assembly of claim 8 , wherein the suppression resistor is a ceramic hollow cylinder.

10. The assembly of claim 1 , further comprising a first bus bar disposed in the first bus bar connection aperture and a second bus bar inserted in the second bus bar connection aperture.

11. The assembly of claim 1 , wherein the second housing includes a radial aperture defined from a center of the second housing to an outer surface of the second housing.

12. The assembly of claim 11 , wherein the first housing includes a tab extending axially therefrom, wherein the tab defines the first bus bar connection aperture and is configured to insert into the radial aperture of the second housing to axially align the first bus bar connection aperture and the second bus bar connection aperture.

13. A rotor assembly for an electrical machine, comprising:
a rotor;
a rectifier diode pack disposed in the rotor; and
a rotating resistor assembly disposed in the rotor and in electrical communication with the rectifier diode pack, comprising:
a first housing configured to contact the rotating shaft and be grounded to the rotating shaft, the first housing comprising a first bus bar connection aperture configured to receive a first bus bar to connect to the rectifier diode pack, wherein the first housing is made of metal;
a second housing configured to connect to the first housing, wherein the second housing is configured to be insulated from the rotating shaft and to be insulated from direct electrical connection with the first housing, the second housing comprising a second bus bar connection aperture configured to receive a second bus bar to connect to the rectifier diode pack, wherein the second housing is made of metal and includes coating such that direct contact with the shaft does not electrically connect the shaft to the second housing, wherein the first housing is uncoated; and
a suppression resistor disposed between the first housing and the second housing and in electrical communication with the first housing and the second housing to provide an electrical pathway between first housing and the second housing.

14. The assembly of claim 13 , wherein the first housing is made of aluminum.

15. The assembly of claim 13 , wherein the metal is aluminum and the coating is a dielectric.

16. The assembly of claim 13 , further comprising an insulating washer disposed between and in contact with the first housing and the second housing to at least provide abrasion resistance to protect the coating of the second housing.

17. A rotating resistor assembly for use in a rotating shaft of an electrical machine, comprising:
a first housing configured to contact the rotating shaft and be grounded to the rotating shaft, the first housing comprising a first bus bar connection aperture configured to receive a first bus bar;
a second housing configured to connect to the first housing, wherein the second housing is configured to be insulated from the rotating shaft and to be insulated from direct electrical connection with the first housing, the second housing comprising a second bus bar connection aperture configured to receive a second bus bar, wherein the second housing includes a radial aperture defined from a center of the second housing to an outer surface of the second housing, wherein the first housing includes a tab extending axially therefrom, wherein the tab defines the first bus bar connection aperture and is configured to insert into the radial aperture of the second housing to axially align the first bus bar connection aperture and the second bus bar connection aperture; and
a suppression resistor disposed between the first housing and the second housing and in electrical communication with the first housing and the second housing to provide an electrical pathway between first housing and the second housing.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Patel Dhaval
• Allen Edward C
• Wilkinson Andrew R

Classifications

• H02K19/36

  Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches · CPC title

• H02K7/003

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title

• H02K11/042 Primary

  Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts · CPC title

• H02M7/003

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H02K11/0094 Primary

  Structural association with other electrical or electronic devices · CPC title