Granted Patent B2

US 7,615,896 · App. 11/588,243 · Granted Nov 10, 2009

Abstract

Claims (34)

1. A blower assembly, comprising:

a fan;

a permanent magnet motor comprising a stator and a rotor, wherein the rotor is disposed within a central bore of the stator; and

a shaft, wherein the shaft is arranged within a central bore of the rotor;

wherein the fan is configured to be driven by the rotor;

wherein the fan is directly attached to the rotor by a connection that is offset in a lateral direction from the central bore of the rotor.

2. A blower assembly, comprising:

a fan;

a permanent magnet motor comprising a stator and a rotor, wherein the rotor is disposed within a central bore of the stator; and

a spacer that directly attaches the fan to the rotor, wherein one surface of the spacer is in direct contact with an axial face of the rotor and an opposite axial surface of the spacer is in contact with an axial face of the fan;

wherein the rotor is configured to drive the fan;

wherein the fan is directly attached to the rotor by a connection that is offset in a lateral direction from a central bore of the rotor.

3. The blower assembly of claim 2 , wherein the fan and motor are integrated.

4. The blower assembly of claim 1 , wherein the rotor comprises a plurality of recesses that retain a plurality of permanent magnets.

5. The blower assembly of claim 4 , wherein the plurality of recesses are arranged along an outer circumferential edge of the rotor.

6. The blower assembly of claim 4 , wherein the rotor further comprises retention structures that retain the plurality of permanent magnets within the rotor.

7. The blower assembly of claim 6 , wherein the retention structures form angled surfaces so that a width of an outer radial opening of a recess is smaller than a width of a base of the recess.

8. The blower assembly of claim 1 , wherein the shaft is configured to extend outward from a surface of the motor in a direction opposite to the fan.

9. The blower assembly of claim 8 , wherein the shaft is configured to drive a second fan, pump, or gear drive in addition to the fan.

10. The blower assembly of claim 2 ,

wherein the rotor comprises a plurality of recesses that retain a plurality of permanent magnets;

wherein the rotor further comprises retention structures that retain the plurality of permanent magnets within the rotor, wherein the retention structures form angled surfaces so that a width of an outer radial opening of a recess is smaller than a width of a base of the recess.

11. The blower assembly of claim 2 , further comprising a shaft, wherein the shaft is arranged within the central bore of the rotor;

wherein the fan is not directly attached to the shaft.

12. The blower assembly of claim 1 , wherein the offset attachment is formed by at least one fastener.

13. The blower assembly of claim 2 , wherein the spacer is disc-shaped.

14. The blower assembly of claim 2 , wherein the spacer is configured to conduct heat from the motor to the fan.

15. A blower assembly, comprising:

a fan;

a permanent magnet motor comprising a stator and a rotor, wherein the rotor is disposed within a central bore of the stator, wherein the rotor is configured to drive the fan; and

a spacer that directly attaches the fan to the rotor, wherein one surface of the spacer is in direct contact with an axial face of the rotor and an opposite axial surface of the spacer is in contact with an axial face of the fan;

wherein the fan is directly attached to the rotor by the spacer and a connection that is offset in a lateral direction from a central bore of the rotor;

wherein the fan is directly attached to the rotor by a connection that is offset in a lateral direction from the central bore of the rotor.

16. The blower assembly of claim 15 , wherein the spacer is configured to conduct heat from the motor to the fan.

Assignments (8)