Product Description

Put an end to the vibration and
roar of large-scale equipment
CTSM200-445mm Sinusoidal Torque Motor
Large Size · High Torque · Quiet Operation
Direct drive technology ●
Torque ripple < 0.5% ●
Industrial-grade durability●
To better adapt to market demands and achieve the goals of miniaturization and lightweighting of brushless motors, through continuous optimization, the CTSM series of frameless brushless DC torque motors with a new design concept have been launched to the market. They feature small size, light body, high power density, high quality, and short production cycle. It provides an excellent solution for designing lightweight and miniaturized servo series for customers.
Functional Features

Multiple size options available (25 - 445mm)
Ultra-high power density, small size, light weight
Directly connected to the equipment to enhance system accuracy and stiffness
Optional stainless steel rotor with high corrosion resistance
Operating temperature range: -40℃ to +55℃
Natural cooling, no need for cooling equipment

Each frame has multiple selectable segment lengths.
Rotor optimized by sinusoidal magnetic field
Low distortion sinusoidal reverse electromotive force waveform, low torque fluctuation
NdFeB material, stable operation in high-temperature environment, high power density
Selectable motor commutation Hall elements
Motor insulation grade F (155℃), also available in H (180℃) and C (210℃) grades
Application
Collaborative robots, service robots, shipborne equipment, aerospace, wechat communication, Beidou navigation, intelligent agriculture, autonomous driving, optical platforms, textile machinery, radar systems, dynamic communication, precision servo systems, CNC machine tools, etc.
Dimensional drawing
CTSM Series Outline Diagram:
Note: There may be a deviation of up to 10% in the motor parameters. Please contact our engineers when selecting the driver.
Model Description
For example:CTSM50-06A35 |
C--Centralized winding |
T--Torque |
S--Servo |
M--Motor |
50—Frame Size, OD 50mm |
06--Stator stack thickness mark 06 is 6mm |
A---Voltage Amplitude Identification |
A—48 B—24 C—60 D—100 E—270 F—80 G—300 H—12 |
K—144 L—72 M-220 N-540 P-36 R-110 |
3500r/min is the 1% mark of rotational speed |
Product parameters
CTSM200 series of high-efficiency brushless DC torque motors | ||||||
Project Model | CTSM200- 10A05 | CTSM200- 20A03 | CTSM200-30A02 | CTSM200-45A016 | CTSM200-60A009 | CTSM200-80A007 |
Rated torque Tr [Nm] | 10 | 20 | 30 | 42 | 52 | 66 |
Rated current Ir [A] ±10% | 11 | 13 | 13 | 14 | 10 | 10 |
Rated voltage Ur [V] | 9.7 | 10.6 | 13.3 | 14.7 | 23.7 | 27.2 |
Peak torque Tmax @ | 20 | 40 | 60 | 75 | 104 | 118 |
Peak current Ip[A] ±10% | 22 | 26 | 26.6 | 25 | 20 | 17.6 |
Peak voltage Up [V] | 48 | 48 | 48 | 48 | 48 | 48 |
Maximum speed nmax [rpm] ± 10% | 500 | 300 | 200 | 160 | 90 | 70 |
Diameter D [mm] | 200 or 220 (with shell) | |||||
Length L [mm] | 10 | 20 | 30 | 45 | 60 | 80 |
Diameter winding head DW [mm] | 193 | 193 | 193 | 193 | 193 | 193 |
A Winding Height A Lwa | 10 | 10 | 10 | 10 | 10 | 10 |
B Winding Height B Lwb[mm] | 12 | 12 | 12 | 12 | 12 | 12 |
Hollow shaft diameter rotor Dr H7 [mm] | 130 | 130 | 130 | 130 | 130 | 130 |
Rotor Height I [mm] | 15 | 25 | 35 | 52 | 65 | 85 |
Stator and rotor deviation Lsr[mm] | 45691 | 45691 | 45691 | 45691 | 45691 | 45691 |
Air gap diameter Dairφ | 150 | 150 | 150 | 150 | 150 | 150 |
气隙长度 Air gap diameter Dair | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 |
Weight m [g] ±10% | 1.6 | 2.7 | 3.85 | 5.8 | 7.5 | 9.8 |
Rotor inertia J [kg*m2] | 0.0014 | 0.0028 | 0.00416 | 0.00625 | 0.00833 | 0.011 |
Copper losses PL,r @Tr and 20°C [W] | 107 | 138 | 172 | 203 | 236 | 271 |
Torque constant kT @ 20°C [Nm/A] ±10% | 0.938 | 1.56 | 2.349 | 3.04 | 5.22 | 6.6 |
Back EMF at Temp [V/r/min-1] | 0.096 | 0.16 | 0.24 | 0.31 | 0.533 | 0.685 |
Motor constant kM @ 20°C [Nm/ √W] | 1.01 | 1.75 | 2.35 | 2.99 | 3.39 | 4.11 |
Terminal resistance RTT @ 20°C [Ω] ±10% | 0.88 | 0.82 | 1.02 | 1.08 | 2.38 | 2.72 |
Terminal inductance LTT * [mH] ±30% | 5.1 | 4.92 | 5.9 | 6.36 | 16.2 | 20.3 |
Number of pole pairs | 14 | 14 | 14 | 14 | 14 | 14 |
If you wish to change the operating voltage or other motor parameters, please contact the engineering and technical personnel. |
CTSM238 series of high-efficiency brushless DC torque motors | ||||||
Project Model | CTSM238- 20A01 | CTSM238- 30A008 | CTSM238-40A008 | CTSM238-50R01 | CTSM238-60C01 | CTSM238-80C01 |
Rated torque Tr [Nm] | 25 | 36 | 50 | 65 | 75 | 105 |
Rated current Ir [A] ±10% | 5.6 | 6.5 | 9 | 5.8 | 13.5 | 18 |
Rated voltage Ur [V] | 25 | 24.7 | 22.7 | 40.3 | 22.5 | 17.4 |
Peak torque Tmax @ | 48 | 71 | 100 | 180 | 200 | 210 |
Peak current Ip[A] ±10% | 10.8 | 12.7 | 18 | 15.9 | 36 | 36 |
Peak voltage Up [V] | 48 | 48 | 48 | 110 | 60 | 60 |
Maximum speed nmax [rpm] ± 10% | 100 | 80 | 80 | 91 | 100 | 95 |
Diameter D [mm] | Without shell: 237.6mm; with shell: 255mm. The weight does not include the shell. | |||||
Length L [mm] | 20 | 30 | 40 | 50 | 60 | 80 |
Diameter winding head DW [mm] | 225 | 225 | 225 | 225 | 225 | 225 |
A Winding Height A Lwa | 10 | 10 | 10 | 10 | 10 | 10 |
B Winding Height B Lwb[mm] | 12 | 12 | 12 | 12 | 12 | 12 |
Hollow shaft diameter rotor Dr H7 [mm] | 165 | 165 | 165 | 165 | 165 | 165 |
Rotor Height I [mm] | 25 | 35 | 45 | 55 | 65 | 85 |
Stator and rotor deviation Lsr[mm] | 45691 | 45691 | 45691 | 45691 | 45691 | 45691 |
Air gap diameter Dairφ | 186 | 186 | 186 | 186 | 186 | 186 |
Air gap diameter Dair | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
Weight m [g] ±10% | 3.7 | 5.2 | 6.7 | 8.3 | 9.8 | 12.8 |
Rotor inertia J [kg*m2] | 0.0077 | 0.107 | 0.0137 | 0.0168 | 0.0199 | 0.026 |
Copper losses PL,r @Tr and 20°C [W] | 140 | 160 | 204 | 235 | 265 | 313 |
Torque constant kT @ 20°C [Nm/A] ±10% | 4.5 | 5.62 | 5.62 | 11.3 | 5.62 | 5.92 |
Back EMF at Temp [V/r/min-1] | 0.48 | 0.6 | 0.6 | 1.208 | 0.6 | 0.63 |
Motor constant kM @ 20°C [Nm/ √W] | 2.13 | 2.88 | 3.58 | 4.3 | 4.66 | 6.02 |
Terminal resistance RTT @ 20°C [Ω] ±10% | 4.5 | 3.8 | 2.52 | 7.02 | 1.47 | 0.97 |
Terminal inductance LTT * [mH] ±30% | 15.2 | 15.5 | 11.34 | 30 | 7.35 | 5.02 |
Number of pole pairs | 17 | 17 | 17 | 17 | 17 | 17 |
If you wish to change the operating voltage or other motor parameters, please contact the engineering and technical personnel. |
CTSM300 series of high-efficiency brushless DC torque motors | ||||||
Project Model | CTSM300-50A008 | CTSM300-50G01 | CTSM300-100A01 | CTSM300-100G008 | CTSM300-200A002 | CTSM300-200G |
Rated torque Tr [Nm] | 100 | 100 | 180 | 180 | 335 | 335 |
Rated current Ir [A] ±10% | 18 | 3.56 | 38 | 5.15 | 15 | 6 |
Rated voltage Ur [V] | 15.4 | 83.5 | 9.2 | 73.6 | 36.2 | 95.2 |
Peak torque Tmax @ | 314 | 372 | 540 | 540 | 1005 | 1005 |
Peak current Ip[A] ±10% | 56.5 | 13.3 | 114 | 15.45 | 45 | 18 |
Peak voltage Up [V] | 48 | 310 | 48 | 310 | 48 | 310 |
Maximum speed nmax [rpm] ± 10% | 78 | 100 | 92 | 80 | 20 | 50 |
Diameter D [mm] | Aluminum shell with a diameter of φ320mm, featuring mounting screw holes. | |||||
Length L [mm] | 50(77) | 50(77) | 100(127) | 100(127) | 200(227) | 200(227) |
Diameter winding head DW [mm] | 290 | 290 | 290 | 290 | 290 | 290 |
A Winding Height A Lwa | 12 | 121 | 12 | 12 | 12 | 12 |
B Winding Height B Lwb[mm] | 15 | 15 | 15 | 15 | 15 | 15 |
Hollow shaft diameter rotor Dr H7 [mm] | 210 | 210 | 210 | 210 | 210 | 210 |
Rotor Height I [mm] | 50 | 50 | 100 | 100 | 200 | 200 |
Stator and rotor deviation Lsr[mm] | 0 | 0 | 0 | 0 | 0 | 0 |
Air gap diameter Dairφ | 241.6 | 241.6 | 241.6 | 241.6 | 241.6 | 241.6 |
Air gap diameter Dair | 1 | 1 | 1 | 1 | 1 | 1 |
Weight m [g] ±10%(Excluding the casing) | 12.2 | 12.2 | 22.8 | 22.8 | 44 | 44 |
Rotor inertia J [kg*m2] | 0.0402 | 0.0402 | 0.075 | 0.075 | 0.145 | 0.145 |
Copper losses PL,r @Tr and 20°C [W] | 277 | 297 | 350 | 378 | 541 | 571 |
Torque constant kT @ 20°C [Nm/A] ±10% | 5.58 | 28.1 | 4.73 | 35.2 | 22.3 | 56.3 |
Back EMF at Temp [V/r/min-1] | 0.615 | 3.1 | 0.52 | 3.875 | 2.46 | 6.2 |
Motor constant kM @ 20°C [Nm/ √W] | 6.05 | 5.91 | 9.64 | 9.3 | 14.4 | 14.1 |
Terminal resistance RTT @ 20°C [Ω] ±10% | 0.855 | 23.5 | 0.24 | 14.3 | 2.4 | 15.9 |
Terminal inductance LTT* [mH] ±30% | 6.4 | 162.4 | 2.3 | 125 | 4.5 | 39.7 |
Number of pole pairs | 23 | 23 | 23 | 23 | 23 | 23 |
If you wish to change the operating voltage or other motor parameters, please contact the engineering and technical personnel. |
CTSM315 series of high-efficiency brushless DC torque motors | ||||||
Project Model | CTSM315-03A01 | CTSM315-03G02 | CTSM315-06A005 | CTSM315-06G005 | CTSM315-09G02 | CTSM315-15G004 |
Rated torque Tr [Nm] | 65 | 65 | 130 | 130 | 190 | 330 |
Rated current Ir [A] ±10% | 15 | 4.65 | 15 | 2.3 | 13.6 | 4 |
Rated voltage Ur [V] | 12.7 | 43.2 | 18.2 | 128.5 | 24.7 | 140 |
Peak torque Tmax @ | 240 | 260 | 330 | 312 | 570 | 735 |
Peak current Ip[A] ±10% | 57 | 18.6 | 38.1 | 5.55 | 40.8 | 8.9 |
Peak voltage Up [V] | 48 | 310 | 48 | 310 | 310 | 310 |
Maximum speed nmax [rpm] ± 10% | 100 | 200 | 50 | 50 | 200 | 40 |
Diameter D [mm] | Without shell: φ315; with shell: φ345 | |||||
Length L [mm] | 30(59) | 30(59) | 60(89) | 60(89) | 90(119) | 150(179) |
Diameter winding head DW [mm] | 305 | 305 | 305 | 305 | 305 | 305 |
A Winding Height A Lwa | 12 | 12 | 12 | 12 | 12 | 12 |
B Winding Height B Lwb[mm] | 17 | 15 | 17 | 15 | 15 | 15 |
Hollow shaft diameter rotor Dr H7 [mm] | 200 | 200 | 200 | 200 | 200 | 200 |
Rotor Height I [mm] | 35 | 35 | 65 | 65 | 95 | 155 |
Stator and rotor deviation Lsr[mm] | 2 | 2 | 2 | 2 | 2 | 2 |
Air gap diameter Dairφ | 248 | 248 | 248 | 248 | 248 | 248 |
Air gap diameter Dair | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
Weight m [g] ±10%(Excluding the casing) | 10.5 | 10.5 | 18.3 | 18.3 | 26.2 | 41.5 |
Rotor inertia J [kg*m2] | 0.03786 | 0.03786 | 0.071 | 0.071 | 0.103 | 0.1677 |
Copper losses PL,r @Tr and 20°C [W] | 190 | 200 | 273 | 295 | 346 | 559 |
Torque constant kT @ 20°C [Nm/A] ±10% | 4.35 | 14 | 8.75 | 56.5 | 14.2 | 82.7 |
Back EMF at Temp [V/r/min-1] | 0.48 | 1.55 | 0.96 | 6.22 | 1.57 | 9.11 |
Motor constant kM @ 20°C [Nm/ √W] | 4.74 | 4.62 | 7.94 | 7.56 | 10.44 | 14 |
Terminal resistance RTT @ 20°C [Ω] ±10% | 0.42 | 9.26 | 1.22 | 55.8 | 1.87 | 34 |
Terminal inductance LTT* [mH] ±30% | 5.9 | 60.9 | 11.5 | 468 | 20.3 | 330 |
Number of pole pairs | 23 | 23 | 23 | 23 | 23 | 23 |
If you wish to change the operating voltage or other motor parameters, please contact the engineering and technical personnel. |
CTSM415 series of high-efficiency brushless DC torque motors | ||||||
Project Model | CTSM415-50G004 | CTSM415-100G01 | CTSM415-155G005 | CTSM415-210G003 | CTSM415-265G03 | CTSM415-320A02 |
Rated torque Tr [Nm] | 200 | 400 | 600 | 800 | 1000 | 1200 |
Rated current Ir [A] ±10% | 3 | 14.2 | 10.7 | 7.1 | 10.6 | 21.5 |
Rated voltage Ur [V] | 106 | 28.5 | 52.4 | 114 | 95 | 45 |
Peak torque Tmax @ | 574 | 1600 | 1800 | 2500 | 3000 | 3500 |
Peak current Ip[A] ±10% | 8.62 | 63 | 35 | 22.2 | 32.2 | 64 |
Peak voltage Up [V] | 310 | 310 | 310 | 310 | 310 | 310 |
Maximum speed nmax [rpm] ± 10% | 40 | 100 | 50 | 25 | 30 | 50 |
Diameter D [mm] | 440 | 440 | 440 | 440 | 440 | 440 |
Length L [mm] | 50(77) | 100(127) | 155(182) | 210(237) | 265(292) | 320(347) |
Diameter winding head DW [mm] | 403 | 403 | 403 | 403 | 403 | 403 |
A Winding Height A Lwa | 12 | 12 | 12 | 12 | 12 | 12 |
B Winding Height B Lwb[mm] | 15 | 15 | 15 | 15 | 15 | 15 |
转子内径 Hollow shaft diameter rotor Dr H7 [mm] | 315 | 315 | 315 | 315 | 315 | 315 |
Rotor Height I [mm] | 55 | 110 | 165 | 220 | 275 | 330 |
Stator and rotor deviation Lsr[mm] | 2 | 5 | 5 | 5 | 5 | 5 |
Air gap diameter Dairφ | 345 | 345 | 345 | 345 | 345 | 345 |
Air gap diameter Dair | 1 | 1 | 1 | 1 | 1 | 1 |
Weight m [Kg] ± 10%(Without a casing) | 21 | 40 | 60.3 | 80.5 | 101 | 121 |
Rotor inertia J [kg*m2] | 0.166 | 0.318 | 0.5 | 0.67 | 0.835 | 0.99 |
Copper losses PL,r @Tr and 20°C [W] | 323 | 418 | 560 | 703 | 825 | 968 |
Torque constant kT @ 20°C [Nm/A] ±10% | 71.6 | 28.5 | 57 | 114 | 95 | 57 |
Back EMF at Temp [V/r/min-1] | 7.78 | 3.1 | 6.2 | 12.4 | 10.35 | 6.2 |
Motor constant kM @ 20°C [Nm/ √W] | 11.94 | 19.8 | 25.76 | 30.5 | 35.15 | 39.4 |
Terminal resistance RTT @ 20°C [Ω] ±10% | 36 | 2.08 | 4.9 | 14 | 7.35 | 2.1 |
Terminal inductance LTT* [mH] ±30% | 315 | 23 | 35 | 168 | 95 | 115 |
Number of pole pairs | 23 | 23 | 23 | 232 | 23 | 23 |
If you wish to change the operating voltage or other motor parameters, please contact the engineering and technical personnel. |
CTSM445 series of high-efficiency brushless DC torque motors | ||||||
Project Model | CTSM445-60A002 | CTSM445-100G006 | CTSM445-150G005 | CTSM445-200G005 | CTSM445-300 | CTSM445-400G003 |
Rated torque Tr [Nm] | 316 | 500 | 800 | 1000 | 1300 | 1700 |
Rated current Ir [A] ±10% | 16.2 | 11 | 14 | 16 | 21 | 18 |
Rated voltage Ur [V] | 20.5 | 46.2 | 50 | 57 | 49.5 | 81.5 |
Peak torque Tmax @ | 742 | 1000 | 1600 | 2000 | 3000 | 3800 |
Peak current Ip[A] ±10% | 38 | 22 | 28 | 32 | 48 | 42 |
Peak voltage Up [V] | 48 | 310 | 310 | 310 | 310 | 310 |
Maximum speed nmax [rpm] ± 10% | 22 | 60 | 50 | 45 | 45 | 30 |
Diameter D [mm] | 480 | 480 | 480 | 480 | 480 | 480 |
Length L [mm] | 60 | 100 | 150 | 200 | 300 | 400 |
Diameter winding head DW [mm] | 435 | 435 | 435 | 435 | 435 | 435 |
A Winding Height A Lwa | 11 | 11 | 11 | 11 | 11 | 11 |
B Winding Height B Lwb[mm] | 14 | 14 | 14 | 14 | 14 | 14 |
Hollow shaft diameter rotor Dr H7 [mm] | 340 | 340 | 340 | 340 | 340 | 340 |
Rotor Height I [mm] | 70 | 110 | 160 | 210 | 310 | 410 |
Stator and rotor deviation Lsr[mm] | 5 | 5 | 5 | 5 | 5 | 5 |
Air gap diameter Dairφ | 375 | 375 | 375 | 375 | 375 | 375 |
Air gap diameter Dair | 1 | 1 | 1 | 1 | 1 | 1 |
Weight m [Kg] ± 10%(Without a casing) | 33 | 51 | 75 | 100 | 145 | 190 |
Rotor inertia J [kg*m2] | 0.302 | 0.475 | 0.69 | 0.906 | 1.338 | 1.77 |
Copper losses PL,r @Tr and 20°C [W] | 330 | 510 | 760 | 905 | 1040 | 1460 |
Torque constant kT @ 20°C [Nm/A] ±10% | 20.1 | 46 | 57.2 | 63.5 | 63.5 | 95.3 |
Back EMF at Temp [V/r/min-1] | 2.18 | 5 | 6.2 | 6.88 | 6.88 | 10.3 |
Motor constant kM @ 20°C [Nm/ √W] | 16.7 | 22.7 | 29.1 | 33.8 | 45.6 | 45.1 |
Terminal resistance RTT @ 20°C [Ω] ±10% | 1.3 | 4.2 | 3.9 | 3.55 | 2.4 | 4.55 |
Terminal inductance LTT* [mH] ±30% | 13.5 | 43.35 | 41.2 | 44 | 32.6 | 58.5 |
Number of pole pairs | 29 | 29 | 29 | 29 | 29 | 29 |
If you wish to change the operating voltage or other motor parameters, please contact the engineering and technical personnel. |
Custom Process

Demand communication

Scheme design

Sample production

Mass production

After-sales service

Technical Support
Service
Dedicated service, along the way
Warranty worry-free, extended repair, often return to promote optimization, peace of mind choice, all in control.
Online customer service Efficient logistics Deliver on time Quality Assurance Technical maintenance Manufacturer support
After-sale guarantee
After-sales service: We provide comprehensive after-sales technical support, if you encounter any problems in the process of use, the professional after-sales engineer team will respond quickly, through telephone, mail or remote assistance, to provide you with detailed solutions. We also provide regular return visits to our products to understand how they are used and to collect your feedback in order to continuously optimize our products and services. In addition, in strict accordance with the quality assurance policy, we provide free repair or replacement services for products with quality problems during the warranty period, so that you have no worries.