System and method with a rotor having parallel sided rotor bars
View Patent ↗The present invention relates generally to motor rotors. More particularly, the invention encompasses a motor rotor having at least one rotor bar. The invention also includes a system and method with a rotor having parallel sided rotor bars. The rotor bar preferably has a core and at least one layer of a rotor bar shim.
1. A motor rotor, comprising:
(a) rotor having a substantially circular peripheral edge;
(b) at least one channel inwardly opening from said peripheral edge and forming an inner entrance and a peripheral entrance;
(c) a rotor bar slot, wherein said rotor bar slot has a slot base, two substantially parallel side walls originating from said slot base and each side wall terminating at a slot angled tip wall, and wherein said slot angled tip wall connects said rotor bar slot to said inner entrance of said channel, and thereby forming said motor rotor; and
(d) a rotor bar within the rotor bar slot, the rotor bar having a rotor bar base, two substantially parallel side walls originating from said bar base and each side wall terminating at a bar angled tip wall, so as to form a substantially rectangular lower body and a substantially triangular upper body, with the bar angled tip wall recessed within the channel below the peripheral edge.
2. The motor rotor of claim 1 , wherein, said rotor is made of a metallic material, and wherein said metallic material is selected from a group consisting of aluminum, steel, copper, composite material, and combination, thereof.
3. The motor rotor of claim 1 , wherein said slot angled tip wall has a slot tip angle, and wherein said slot tip angle is between about 30 degree to about 70 degree.
4. The motor rotor of claim 1 , wherein said rotor has a central opening and wherein said central opening has at least one key slot, and wherein said key slot is selected from a group consisting of a trapezoidal key slot, a square key slot, a rectangular key slot, an elliptical key slot, a triangular key slot, and combination thereof.
5. A rotor bar, comprising a rotor bar base, two substantially parallel side walls originating from said bar base and each side wall terminating at a bar angled tip wall forming an intersecting knife edge, so as to form a substantially rectangular lower body and a substantially triangular upper body, and thereby forming said rotor bar.
6. The rotor bar of claim 5 , wherein said rotor bar is made of a metallic material, and wherein, said, metallic material is selected from a group consisting of aluminum, steel, copper, composite material, and combination thereof.
7. The rotor bar of claim 5 , wherein said rotor bar has at least one layer of a rotor bar shim material wrapped about the base, side walls and angled tip walls substantially along the entire axial length thereof.
8. The rotor bar of claim 5 , wherein said rotor bar has at least one layer of a rotor bar shim material wrapped about the base, side walls and angled tip walls substantially along the entire axial length thereof, and wherein said rotor bar shim comprises a metallic material.
9. The rotor bar of claim 5 , wherein said rotor bar has at least one layer of a rotor bar shim material wrapped about the base, side walls and angled tip walls substantially along the entire axial length thereof, and wherein said rotor bar shim is a metallic material, and wherein said metallic material is selected from a group consisting of aluminum, steel, copper, composite material, and combination thereof.
10. The rotor bar of claim 5 , wherein said bar angled tip wall has a bar tip angle and wherein said bar tip angle is between about 30 degree to about 70 degree.
11. A motor rotor, comprising:
(a) a rotor having a substantially circular peripheral edge;
(b) at least one channel inwardly opening from said peripheral edge and forming an inner entrance and a peripheral entrance;
(c) a rotor bar slot, wherein said rotor bar slot has a slot base, two substantially parallel side walls originating from said slot base and each side wall terminating at a slot angled tip wall, and wherein said slot angled tip wall connects said rotor bar slot to said inner entrance of said channel;
(d) a rotor bar, comprising a rotor bar base, two substantially parallel side walls originating from said bar base and each side wall terminating at a bar angled tip wall forming an intersecting knife edge, so as to form a substantially rectangular lower body and a substantially triangular upper body; and
(e) wherein said rotor bar slot accommodates said rotor bar such that at least a portion of said triangular upper body is inside at least a portion of said channel recessed therein below the peripheral edge, and thereby forming said motor rotor.
12. The motor rotor of claim 11 , wherein said rotor is made of a metallic material, and wherein said metallic material is selected from a group consisting of aluminum, steel, copper, composite material, and combination thereof.
13. The motor rotor of claim 11 , wherein said slot angled tip wall has a slot tip angle, and wherein said slot tip angle is between about 30 degree to about 70 degree.
14. The motor rotor of claim 11 , wherein said rotor has a central opening and wherein said central opening has at least one key slot, and wherein said key slot is selected from a group consisting of a trapezoidal key slot, a square key slot, a rectangular key slot, an elliptical key slot, a triangular key slot, and combination thereof.
15. The motor rotor of claim 11 , wherein said rotor bar is made of a metallic material, and wherein said metallic material is selected from a group consisting of aluminum, steel, copper, composite material, and combination thereof.
16. The motor rotor of claim 11 , wherein said rotor bar has at least one layer of a rotor bar shim material wrapped about the base, side walls and angled tip walls substantially along the entire axial length thereof.
17. The motor rotor of claim 11 , wherein said rotor bar has at least one layer of a rotor bar shim material wrapped about the base, side walls and angled tip walls substantially along the entire axial length thereof, and wherein said rotor bar shim comprises a metallic material.
18. The motor rotor of claim 11 , wherein said rotor bar has at least one layer of a rotor bar shim material wrapped about the base, side walls and angled tip walls substantially along the entire axial length thereof, and wherein said rotor bar shim is a metallic material, and wherein said metallic material is selected from a group consisting of aluminum, steel, copper, composite material, and combination thereof.
19. The motor rotor of claim 11 , wherein said bar angled tip wall has a bar tip angle and wherein said bar tip angle is between about 30 degree to about 70 degree.