The design of slotless electrical machine includes coils mounted on the core and permanent magnets. In the traditional construction, the core is made of ferromagnetic solid or laminated material (An Analytical Solution for the Normal Force in Linear Actuators by M. A. da Silveira, A. F. Flores Filho, R. P. Homrich—2005 IEEE International Conference on Electric Machines and Drives, May 2005). For this construction, the attraction and cogging force between permanent magnets and ferromagnetic core can be very high.
The invented construction of slotless electrical machines with mixed core provides less magnetic attraction and cogging force. The mixed core is made of both ferromagnetic and non-ferromagnetic laminations. In the construction with mixed core the attraction and cogging force is reduced.
FIG. 1—Linear flat slotless electrical machine with forcer that includes ferromagnetic core.
FIG. 2—Invented linear flat slotless electrical machine with forcer that includes mixed core.
FIG. 3—Mixed ferromagnetic/non-ferromagnetic core for invented linear flat slotless electrical machine.
FIG. 4—Height mixed ferromagnetic/non-ferromagnetic core for invented linear flat slotless electrical machine.
FIG. 5—Invented linear flat slotless electrical machine with forcer that includes height mixed core.
FIG. 6—Random mixed ferromagnetic/non-ferromagnetic core for invented linear flat slotless electrical machine.
FIG. 7—Invented linear flat slotless electrical machine with forcer that includes random mixed core.
FIG. 8—Rotary slotless electrical machine with stator that includes ferromagnetic core.
FIG. 9—Invented rotary slotless electrical machine with stator that includes mixed core.
FIG. 10—Mixed ferromagnetic/non-ferromagnetic core for invented rotary slotless electrical machine.
FIG. 11—Radial mixed ferromagnetic/non-ferromagnetic core for invented rotary slotless electrical machine.
FIG. 12—Invented rotary slotless electrical machine with stator that includes radial mixed core.
FIG. 13—Random mixed ferromagnetic/non-ferromagnetic core for invented rotary slotless electrical machine.
FIG. 14—Invented rotary slotless electrical machine with stator that includes random mixed core.
FIG. 15—Linear tube slotless electrical machine (internal magnets) with forcer that includes ferromagnetic core.
FIG. 16—Invented linear tube slotless electrical machine (internal magnets) with forcer that includes mixed core.
FIG. 17—Mixed ferromagnetic/non-ferromagnetic core for invented linear tube slotless electrical machine (internal magnets).
FIG. 18—Radial mixed ferromagnetic/non-ferromagnetic core for invented linear tube slotless electrical machine (internal magnets).
FIG. 19—Invented linear tube slotless electrical machine (internal magnets) with forcer that includes radial mixed core.
FIG. 20—Random mixed ferromagnetic/non-ferromagnetic core for invented linear tube slotless electrical machine (internal magnets).
FIG. 21—Invented linear tube slotless electrical machine (internal magnets) with forcer that includes random mixed core.
FIG. 22—Linear tube slotless electrical machine (external magnets) with forcer that includes ferromagnetic core.
FIG. 23—Invented linear tube slotless electrical machine (external magnets) with forcer that includes mixed core.
FIG. 24—Mixed ferromagnetic/non-ferromagnetic core for invented linear tube slotless electrical machine (external magnets).
FIG. 25—Radial mixed ferromagnetic/non-ferromagnetic core for invented linear tube slotless electrical machine (external magnets).
FIG. 26—Invented linear tube slotless electrical machine (external magnets) with forcer that includes radial mixed core.
FIG. 27—Random mixed ferromagnetic/non-ferromagnetic core for invented linear tube slotless electrical machine (external magnets).
FIG. 28—Invented linear tube slotless electrical machine (external magnets) with forcer that includes random mixed core.
Linear Flat Slotless Electrical Machine with Mixed Core.
Linear flat slotless electrical machine with forcer that includes coils and ferromagnetic solid or laminated core for coils mounting is shown on
The invented linear flat slotless electrical machine construction includes forcer 24 consisted of coils 12 encapsulated in epoxy 14, and mixed ferromagnetic/non-ferromagnetic core 26 (
The mixed core 26 for linear flat slotless electrical machine is shown on
The mixed core can also be made of ferromagnetic laminations 36 and non-ferromagnetic laminations 38 that alternate along the core height. The construction of height mixed core 32 is shown on
The mixed core can also be made of ferromagnetic laminations 36 and non-ferromagnetic laminations 30 and 38 that alternate both along the core height and along the core width. The construction of random mixed core 40 is shown on
The exact dimensions, mutual position and quantity of ferromagnetic laminations 28 and 36 and non-ferromagnetic laminations 30 and 38 for any type of mixed core depend on electromechanical design and are subject for optimization.
Rotary Slotless Electrical Machine with Mixed Core.
Rotary slotless electrical machine with stator that includes coils and ferromagnetic solid or laminated core for coils mounting is shown on
The invented rotary slotless electrical machine construction includes stator 56 consisted of coils 46 encapsulated in epoxy 14, and mixed ferromagnetic/non-ferromagnetic core 58 (
The mixed core 58 for rotary slotless electrical machine is shown on
The mixed core can also be made of ferromagnetic laminations 64 and non-ferromagnetic laminations 66 that alternate along the core radius. The construction of radial mixed core 68 is shown on
The mixed core can also be made of ferromagnetic laminations 64 and non-ferromagnetic laminations 62 and 66 that alternate both along the core length and along the core radius. The construction of random mixed core 72 is shown on
The exact dimensions, mutual position and quantity of ferromagnetic laminations 60 and 64 and non-ferromagnetic laminations 62 and 66 for any type of mixed core depend on electromechanical design and are subject for optimization.
Linear Tube Slotless Electrical Machine (Internal Magnets) with Mixed Core.
Linear tube slotless electrical machine (internal magnets) with forcer that includes coils and ferromagnetic solid or laminated core is shown on
The invented linear tube slotless electrical machine (internal magnets) construction includes forcer 86 consisted of coils 76 and mixed ferromagnetic/non-ferromagnetic core 88 (
The mixed core 88 for linear tube slotless electrical machine (internal magnets) is shown on
The mixed core can also be made of ferromagnetic laminations 94 and non-ferromagnetic laminations 96 that alternate along the core radius. The construction of radial mixed core 98 is shown on
The mixed core can also be made of ferromagnetic laminations 94 and non-ferromagnetic laminations 92 and 96 that alternate both along the core arc and along the core radius. The construction of random mixed core 102 is shown on
The exact dimensions, mutual position and quantity of ferromagnetic laminations 90 and 94 and non-ferromagnetic laminations 92 and 96 for any type of mixed core depend on electromechanical design and are subject for optimization.
Linear Tube Slotless Electrical Machine (External Magnets) with Mixed Core.
Linear tube slotless electrical machine (external magnets) with forcer that includes coils and ferromagnetic solid or laminated core is shown on
The invented linear tube slotless electrical machine (external magnets) construction includes forcer 118 consisted of coils 108 and mixed ferromagnetic/non-ferromagnetic core 120 (
The mixed core 120 for linear tube slotless electrical machine (external magnets) is shown on
The mixed core can also be made of ferromagnetic laminations 126 and non-ferromagnetic laminations 128 that alternate along the core radius. The construction of radial mixed core 130 is shown on
The mixed core can also be made of ferromagnetic laminations 126 and non-ferromagnetic laminations 124 and 128 that alternate both along the core arc and along the core radius. The construction of random mixed core 134 is shown on
The exact dimensions, mutual position and quantity of ferromagnetic laminations 122 and 126 and non-ferromagnetic laminations 124 and 128 for any type of mixed core depend on electromechanical design and are subject for optimization.
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/US11/66897 | 12/22/2011 | WO | 00 | 6/27/2013 |
Number | Date | Country | |
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61460241 | Dec 2010 | US |