SEA MOTION employs a special winding type that effectively increases motor efficiency. This winding method has been adopted by some leading international brands. The winding method has a significant impact on the performance of a coreless motor. SEA MOTION technical team has spent years researching and overcoming technical challenges to develop this winding method and the corresponding automated winding machinery.
Motor Structure Parts List1. Output Flange
2. Housing
3. Laminated Steel Stack
4. Permanent Magnet
5. Shaft
6. Winding
7. PCB Bracket
8. PCBA with Hall Sensors
9. Cable
10. Ball Bearings
11. O-ring
12. Input Flange
13. Balancing Disks
14. Limiting Tube
Regarding encoder feedback, SEA MOTION coreless motor supports both magnetic and optical encoder feedback, as well as incremental and absolute multi-turn feedback. We offer planetary gear modules to provide the coreless motor with greater output torque.
Here is a comparison of SEA MOTION coreless motor specifications with those of domestic competitors and leading international brands. This data is sourced from their official website.
For the same size, even a slight improvement in performance and parameters presents challenges to design, manufacturing, and QC.
|
Parameter |
Our motor |
Maxon |
Faulhaber |
Portescap |
Other brand |
|
Brand |
Our motor |
Maxon |
Faulhaber |
Portescap |
Other brand |
|
Model |
EC1636 |
EC-Max1636 |
B 1628 |
16ECP36 |
EC 1636 |
|
Diameter / mm |
16 |
16 |
16 |
16 |
16 |
|
Rated voltage / V |
24 |
24 |
24 |
24 |
24 |
|
Max efficiency / % |
72 |
71 |
69 |
/ |
72.2 |
|
No load speed / rpm |
15600 |
11900 |
31600 |
12420 |
14668 |
|
No load current / mA |
90 |
31.9 |
45 |
35 |
50 |
|
Phase resistance / Ω |
6.12 |
20.5 |
15.2 |
21 |
10.8 |
|
Max continuous torque / mNM |
7 |
8.19 |
3.3 |
7.2 |
6 |
|
Stall torque / mNM |
56.4 |
22 |
11 |
/ |
33 |
|
Speed constant / rpm/V |
653 |
510 |
1349 |
543 |
625 |
|
Torque constant / mNM/A |
14.4 |
18.7 |
7.08 |
17.6 |
15.3 |
|
Slope / rpm/mNM |
277 |
556 |
2896 |
648 |
444 |
|
Mechanical time constant / ms |
2.23 |
4.95 |
16.4 |
3.7 |
2.9 |
|
Moment of inertia / gcm² |
0.756 |
0.85 |
0.54 |
0.6 |
0.62 |
|
Length / mm |
36 |
36 |
28 |
36 |
36 |
|
Parameter |
Our motor |
Maxon |
Faulhaber |
Portescap |
Other brand |
|
Brand |
Our motor |
Maxon |
Faulhaber |
Portescap |
Other brand |
|
Model |
EC2248 |
EC-Max2248 |
B 2057 |
22ECP45 |
EC 2248 |
|
Diameter / mm |
22 |
22 |
20 |
22 |
22 |
|
Rated voltage / V |
24 |
24 |
24 |
24 |
24 |
|
Max efficiency / % |
78 |
76 |
84 |
/ |
79.7 |
|
No load speed / rpm |
12900 |
12900 |
24900 |
15700 |
12930 |
|
No load current / mA |
146 |
121 |
129 |
60 |
102 |
|
Phase resistance / Ω |
2.25 |
3.44 |
1.32 |
1.5 |
2.71 |
|
Max continuous torque / mNM |
20 |
22.7 |
19.5 |
29.4 |
18 |
|
Stall torque / mNM |
187 |
121 |
172 |
/ |
153 |
|
Speed constant / rpm/V |
543 |
549 |
1010 |
654 |
545 |
|
Torque constant / mNM/A |
17.5 |
17.4 |
9.46 |
14.6 |
17.5 |
|
Slope / rpm/mNM |
69.8 |
109 |
141 |
67.2 |
84.3 |
|
Mechanical time constant / ms |
2.54 |
5.06 |
5.9 |
1.6 |
2.8 |
|
Moment of inertia / gcm² |
3.43 |
4.45 |
4 |
2.3 |
3.1 |
|
Length / mm |
45 |
45 |
/ |
45 |
45 |
The advantages of SEA MOTION coreless motors are as follows:
1. Higher efficiency and lower heat generation due to the absence of a core.
2. Lower moment of inertia: SEA MOTION coreless motors have a moment of inertia only 1/10 to 1/5 that of traditional motors, resulting in excellent dynamic performance.
3. No cogging torque, leading to extremely smooth operation. Low-speed vibration-free operation, with speed fluctuations controlled within 2%.
4. Small size and high power density.
5. Extremely low electromagnetic interference.
6. Excellent linearity in motor control.
7. Fully independent and controllable industrial chain.
Medical: Endoscopes, surgical robots, precision pumps;
Industrial: Servo gimbals, robotic dexterity hands, precision automation;
Consumer electronics: Drones, high-end camera image stabilization, smart wearables;
Aerospace: Miniature servos, attitude control.
The core equipment for coreless motors revolves around coil production. Therefore, winding fabrication is paramount and determines the performance of the coreless motor. We have developed and designed fully automated winding equipment based on the winding type.
The second step is pressing the wire sheet; the third step is winding the wire sheet into a coil, forming the coil shape; finally, it is baked at high temperature to set the shape, completing the coil fabrication.
Address
403 4F Office Building Robot Industry Park No.232 Yuanfeng Road National High Tech Park Kunshan Suzhou Jiangsu China
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