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D155L210 Waterproof 38kv Brushless Motor 45kw for Outboard Engine

Engineered as the flagship model in its class, the D155L210-WP-38KV sets the standard for ultra-low-speed, high-torque marine propulsion. With its exceptionally low 38 KV rating and optimized windings for a wide high-voltage range (57.6-168V), it is purpose-built to deliver monumental torque exceeding 76 N·m and 45 kW of peak power at modest RPMs. This design philosophy makes it the ultimate solution for direct-drive systems in heavy-duty applications like large electric outboards and high-thrust commercial thrusters, eliminating the complexity and losses associated with gearboxes. Its robust water-cooled construction and full IP68 sealing ensure unwavering reliability and thermal management during continuous, high-load underwater operation.

• Peak Power: 45 kW • Peak Torque: 76 N·m • Max Speed: 6,384 RPM
• Waterproof Rating: IP68 • Weight: 17.0 kg

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System Types:
All
Kv:
<100
Controller Type:
Sensorless
Maximum Voltage:
60V
Maximum Continuous Current:
< 120A

Outboard Motor Brushless Motor Waterproof Motor

Features

Specification

Dyno Tested Data

Dimension

Key Features

Robust & durable: Housing in black anodizing aluminum alloy, improve conductive heat transfer, prevent corrosion and oxidation
High performance: Our motors provide extremely high torques with a minimum of power consumption.
Silient: low-cogging electro-magnetic design and dynamically balanced rotor, extremely silient and smooth operation.
Efficiency: Our energy-efficient motors save energy and costs, efficiency up to 90%.
Highter on power to weight ratio and torque to weight ratio.
Compact: High efficiency and high power density realized in a compact design.
Ball-bearing construction: Double seal ball bearings with moisture resistant grease for long life.
Cooling solution: water-cooling & Air-Cooling.
Shaft in SS316 Stainless Steel: withstand redial/axile stree,and work in the sea water against corrosion.

Applications:
High power electric motor for various water propulsion

1. Electric outboard engine
2. Electric Jet Ski
3. Underwater thruster
4. Electric boat motor

Item	Specification
Model	D155L210-38
Working Voltage Range	18-40S (57.6-168V)
Max. Free Speed	6,384 rpm
Speed Constant (Kv)	38
Torque Constant (Kt)	0.2688 N·m/A
No Load Current (at 8.4V)	2.0 A
Max. Output Power	45.0 kW
Peak Torque (at 60% duty)	76 N·m
Peak Current	400 A
Max. Motor Efficiency	92.00%
Weight	16.8 kg
Configuration	12 Slots/10 Poles
Cooling Solution	Water Cooling
Dimension (Dia. x Length)	D155 x L210 mm
Max. Working Temperature	120ºC
Insulation Voltage & Leak Current	AC500V / 10mA / 3s
Shaft Output	D25 x L50 mm
Lead Wires Extension	2AWG x 300mm
Connector	10.0mm Plug
Life Span	8,000 H

D155L210 at 38Kv -72V
Item No.	C_Voltage (V)	C_Current (A)	C_Input Power(W)	M_Voltage (V)	M_Current (A)	M_Input Power(W)	M_Efficiency (%)	M_Speed (rpm)	M_Torque (N*m)	M_Output Power(W)
0	72.300003	25.34	1667.540039	56.419998	21.370001	1604.47998	82.978546	2584	4.920004	1331.374146
1	72.209999	43.380001	3062.800049	56.200001	35.529999	2995.810059	89.174049	2551	10.000004	2671.485107
2	72.110001	63.700001	4535.129883	56.119999	53.700001	4441.100098	90.894905	2526	15.260004	4036.733887
3	72.019997	83.089996	5925.640137	55.98	71.300003	5776.129883	92.143028	2511	20.240004	5322.300781
4	71.93	103.5	7378.609863	55.900002	89.940002	7203.799805	91.365791	2498	25.160004	6581.808594
5	71.830002	122.800003	8746.040039	55.77	107.019997	8530.169922	90.608536	2480	29.760004	7729.062012
6	71.730003	145.970001	10359.54004	55.599998	126.919998	10069.94043	90.124626	2469	35.100002	9075.496094
7	71.639999	169.149994	11954.30957	55.540001	145.869995	11536.87012	89.19136	2454	40.040005	10289.8916
8	71.559998	189.820007	13357.63965	55.400002	163.399994	12912.7002	88.224327	2438	44.620003	11392.14258
9	71.459999	216.639999	15144.63965	55.259998	185.020004	14595.37988	86.668579	2411	50.100002	12649.6084
10	71.379997	238.529999	16574.17969	55.150002	201.960007	15926.20996	85.49704	2384	54.540005	13616.43848
11	71.269997	270.149994	18605.39063	55.27	226.210007	17807.18945	83.134804	2342	60.360004	14803.97266