Burgi Engineers LLC
Delivering unique solutions
for high performance rotating
machinery systems.
(406) 257-2734 / ext. 5000call

High Performance Liquid Cooled AC Motors



Liquid-Cooled-ACMotorLiquid-Cooled-ACMotorLiquid-Cooled-ACMotor

Our AC motor systems exceed others in broad range torque, power and speed performance. Because we design and build these systems ourselves, we have complete knowledge of what goes into them. Among other things, we maintain knowledge of the materials being used, the fit between the rotor and shaft, the electrical design, the natural frequency of the rotor, the bearing stiffness values, the component stress levels and the heat transfer data for various parts of the motor. This allows us to push our designs to their limits. Combine all of this with our years of field experience relative to rotating machinery integration and it is easy to see how we can give you the ultimate advantage in your high performance equipment.

We have a large selection of standard designs of high performance motors to choose from in an array of cooling and lubrication configurations. And we lead the industry in lead times for delivery; a typical motor order takes only 8‐10 weeks. Please reference the tables below to get an idea of what size motor and what configuration type will meet your application’s requirements. Please note that we possess the ability to provide custom designs to meet your specific power curve, speed performance and interface requirements. The tables below are performance characteristics for standard motor configurations; higher power, higher speed, and higher torque levels can be achieved through custom design. Please contact Burgi Engineers LLC for more information.

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Oil cooled AC motors with oil jet lubricated bearings

Motor Frame Size kW RPM Nm
14 S 59 31,000 51
14 L 66 27,300 67
18 S 86 23,100 1000
18 L 106 21,000 149
21 S 125 21,000 205
21 L 156 18,900 306
25 S 156 17,900 332
25 L 188 16,800 494
28 S 195 16,8000 518
28 L 239 14,700 776
32 S 247 13,700 872
32 L 294 12,600 1,217
36 S 313 12,600 1,300
36 L 376 10,500 1,840
40 S 446 10,500 1,956
40 L 473 8,400 2,740
44 S 586 9,400 3,115
44 L 705 5,800 4,340

Water Cooled AC motors with air-oil lubricated bearings

Motor Frame Size kW RPM Nm
14 S 12 25,000 28
14 L 16 25,000 37
18 S 19 18,900 53
18 L 23 18,900 69
21 S 27 16,800 95
21 L 32 16,800 131
25 S 40 15,800 149
25 L 59 15,800 225
28 S 70 15,600 249
28 L 105 14,7000 375
32 S 110 13,700 416
32 L 149 12,600 584
36 S 156 12,400 599
36 L 205 10,500 852
40 S 208 10,200 861
40 L 267 8,400 1,120
44 S 316 7,800 1,600
44 L 450 5,700 2,260

Water cooled AC motor with grease packed bearings

Motor Frame Size kW RPM Nm
14 S 12 15,800 28
14 L 16 15,800 37
18 S 19 13,100 53
18 L 23 13,100 69
21 S 27 10,000 95
21 L 32 10,000 131
25 S 40 9,500 149
25 L 59 9,500 225
28 S 70 8,500 249
28 L 105 8,500 375
32 S 110 8,300 416
32 L 149 8,300 584
36 S 156 7,400 599
36 L 205 7,400 852
40 S 208 6,300 861
40 L 267 6,300 1,120
44 S 316 5,200 1,600
44 L 450 5,200 2,260

**Higher power, higher speed, and higher torque levels can be achieved through custom design. Please contact Burgi Engineers LLC for more information.