China Standard CHINAMFG D155L210 Water-Cooling 45kw DC Electric Motor with Encoder for Outboard Motor vacuum pump distributors

Product Description

Quanly D155L210 Water-Cooling 45kw DC Electric Motor with Encoder  for Outboard Motor



Electric Propulsion for various watercrafts

1. Efoil / Waterbike
2. Jet Surf/Surboard
3. Underwater thruster
4. Small boat /SUP / Kayak
5. POD drive
6. Jetski / Speed Boat
7. Yacht

Either work with propeller directly or as an integrated part in
a airtight cabin of trolling motor/outboard motor / POD



Product Description

With an advanced 10-pole encapsulated core and 155mm diameter, this series compact DC motors deliver high torque up to 70 NM with CHINAMFG power at 45KW. Thanks to the unique sealing configuration design, these motors are tested waterproof IP68 according to ingress protection class, and can be operated permanently underwater and applied in marine environments. 

We can also customize the winding to perfectly match your voltage, current, and maximum operating speed. Special shaft modifications, cables and connectors are available CHINAMFG request. 

Can be customized for 

– Sensor or sensorless
– Winding Current
– Shaft Options
– Cable and Connector
– Kv Ratings
– Mounting Options
– Encoder or Non


Product Parameters

Variants D155L210-95 D155L210-76 D155L210-63 D155L210-54 D155L210-48 D155L210-38
Winding Turn & Connection 2.0T 2.5T 3.0T 3.5T 4.0T 5.0T
LiPo/Voltage Range 8-16S (26-67.2V) 10-20S(35-84V) 10-24S(37-100.8V) 14-28S (51.8-117.6V) 14-32S(51.8-134.4V) 18-40S(57.6-168V)
Max RPM  6,384  6,384  6,350  6,350  6,451  6384
kV(RPM/V) 95 76 63 54 48 38
Kt(N*M/A) 0.1088  0.1328  0.1632  0.1882  0.2150  0.2688
Current at 8.4V without Loading  5.30  4.30  3.50  3.00  2.70  2.0 
Max power (KW) 45.0  46.0  46.0  45.0  45.0  45.0 
Peak current(A) 1,000  800  670  580  500  400
Effeciency 89.00% 89.00% 90.00% 91.00% 91.00% 92.00%
Max torque at 60%(N*M) 69.0  71.0  73.0  72.0  71.0  76
Rated power at 80% (KW) 26.0  26.0  26.6  26.0  26.0  26.0 
Rating Torque at 80% (N*M)  52.0  53.0  52.0  51.0  51.0  52.0 
Weight(kg) 16.90  16.40  16.70  16.30  16.80  16.80 
Construction 12N/10P
Cooling Solution Water cooling
Max working temperature 120ºC
Lead wires extension 2AWGx300mm
Insulation voltage & leak current AC500V/10mA/3S
Plug 10.0mm plug
Life Span(hrs) 8,000


Drawing Dimension





Wiring Diagram



Auto Dyno Testing


Five Axis Diagram (Auto Dyno test at 60V)


Motor Efficiency Nephogram



Motor Efficiency Nephogram at 48KV-60V)

Auto Test Report

Item No. C_Voltage
C_Input Power(W) C_
Power Factor
M_Input Power(W) M_
Power Factor
M_Output Power(W) Synthesis Efficiency
0 60.040001 37.75 2239.100098 0.9881 98.354691 44.82 31.34 2202.26001 0.9052 173.240005 87.927597 2597 7.119996 1936.394287 86.48571
1 59.950001 55.23 3246.840088 0.9806 98.337769 44.599998 46.52 3192.870117 0.8885 171.350006 91.564461 2506 11.139996 2923.534424 90.04245
2 59.869999 72.75 4215.950195 0.968 98.256378 44.400002 61.900002 4142.439941 0.8703 178.479996 92.088989 2422 15.039995 3814.731201 90.483307
3 59.799999 90.300003 5144.129883 0.9527 98. 0571 94 44.290001 77.019997 5044.930176 0.8539 195.729996 92.526985 2346 18.999994 4667.921875 90.742691
4 59.720001 108.860001 6078.52002 0.935 97.941444 44.240002 92.849998 5953.390137 0.8368 239.600006 92.162712 2276 23.019995 5486.8 0571 4 90.265488
5 59.639999 127.629997 6983.830078 0.9175 97.699684 44.25719 108.699997 6823.180176 0.8197 229.5 91.80571 2212 27.039995 6263.741699 89.689209
6 59.580002 146.649994 7875.080078 0.9012 97.287903 44.220001 124.519997 7661.5 0.8034 233.5 90.934929 2153 30.899994 6966.979492 88.468681
7 59.52 166.25 8783.19043 0.8876 96.957367 44.240002 141.190002 8515.950195 0.7872 217.699997 90.229736 2094 35.039993 7683.919434 87.484375
8 59.450001 185.139999 9671.40571 0.8787 96.661087 44.27 157.710007 9348.48 0571 0.7731 232.429993 89.346848 2043 39.039993 8352.572266 86.363625
9 59.400002 204.571999 10568.36035 0.8721 96.378242 44.290001 174.759995 10185.59961 0.7599 229.589996 88.237434 1994 43.039993 8987.511719 85.57187
10 59.34 218.550003 11275.83008 0.8694 96.144226 44.299999 188.270004 10841.5717 0.7505 244.199997 87.293343 1956 46.199993 9463.523438 83.927513

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Application: Yachts Motor/Underwater Propeller/Subsea Scooter
Operating Speed: Adjust Speed
Excitation Mode: Permanent Magnetism
Function: Driving
Casing Protection: Closed Type
Number of Poles: 10


dc motor

In which applications are DC motors commonly used, and what advantages do they offer?

DC (Direct Current) motors are widely used in various applications due to their versatility, controllability, and specific advantages they offer. Here’s a detailed explanation of the common applications of DC motors and the advantages they provide:

1. Robotics:

DC motors are extensively used in robotics for precise control of movement and manipulation. They provide high torque and speed control, allowing robots to perform tasks with accuracy and efficiency. DC motors enable robotic arms, grippers, and mobile robots to execute complex motions and interact with their environment effectively.

2. Industrial Automation:

In industrial automation, DC motors are employed in conveyors, actuators, and positioning systems. The ability to control the motor speed and torque makes them suitable for applications such as material handling, assembly lines, and CNC machines. DC motors offer precise control over acceleration, deceleration, and positioning, enhancing overall productivity and efficiency in manufacturing processes.

3. Electric Vehicles:

DC motors have been widely used in electric vehicles (EVs) for many years. They are commonly found in electric cars, motorcycles, and scooters. DC motors provide high torque from standstill, enabling efficient acceleration and smooth operation. They also offer regenerative braking capabilities, which help in energy recovery during deceleration, thereby increasing the vehicle’s overall efficiency.

4. Appliances:

DC motors are utilized in various household appliances, including fans, blenders, vacuum cleaners, and refrigerators. Their controllable speed and torque allow for efficient operation and improved energy consumption. In appliances where variable speed control is required, such as ceiling fans or blender settings, DC motors offer precise adjustment options to meet different user preferences.

5. Renewable Energy Systems:

DC motors play a crucial role in renewable energy systems, such as wind turbines and solar tracking systems. They convert the rotational energy from wind or sunlight into electrical energy. DC motors enable precise tracking of the sun’s movement for optimal solar energy collection and efficient conversion of wind energy into electricity.

6. Advantages of DC Motors:

DC motors offer several advantages that make them suitable for various applications:

  • Precise Speed Control: DC motors provide accurate and adjustable speed control, allowing for precise regulation of motor output.
  • High Starting Torque: DC motors deliver high torque at startup, making them suitable for applications requiring quick acceleration or heavy loads.
  • Controllability: DC motors can be easily controlled using voltage regulation, current limiting, and feedback control techniques.
  • Efficiency: DC motors have high efficiency, especially when operating at lower speeds.
  • Reliability: DC motors are known for their robustness and reliability, requiring minimal maintenance.
  • Compact Size: DC motors are available in various sizes and can be designed compactly, making them suitable for applications with space constraints.

These advantages make DC motors an attractive choice in various industries and applications where precise control, high starting torque, and reliability are essential.

dc motor

How is the efficiency of a DC motor determined, and what factors can affect it?

In a DC (Direct Current) motor, efficiency refers to the ratio of the motor’s output power (mechanical power) to its input power (electrical power). It is a measure of how effectively the motor converts electrical energy into mechanical work. The efficiency of a DC motor can be determined by considering several factors that affect its performance. Here’s a detailed explanation of how the efficiency of a DC motor is determined and the factors that can influence it:

The efficiency of a DC motor is calculated using the following formula:

Efficiency = (Output Power / Input Power) × 100%

1. Output Power: The output power of a DC motor is the mechanical power produced at the motor’s shaft. It can be calculated using the formula:

Output Power = Torque × Angular Speed

The torque is the rotational force exerted by the motor, and the angular speed is the rate at which the motor rotates. The output power represents the useful work or mechanical energy delivered by the motor.

2. Input Power: The input power of a DC motor is the electrical power supplied to the motor. It can be calculated using the formula:

Input Power = Voltage × Current

The voltage is the electrical potential difference applied to the motor, and the current is the amount of electrical current flowing through the motor. The input power represents the electrical energy consumed by the motor.

Once the output power and input power are determined, the efficiency can be calculated using the formula mentioned earlier.

Several factors can influence the efficiency of a DC motor:

1. Copper Losses:

Copper losses occur due to the resistance of the copper windings in the motor. These losses result in the conversion of electrical energy into heat. Higher resistance or increased current flow leads to greater copper losses and reduces the efficiency of the motor. Using thicker wire for the windings and minimizing resistance can help reduce copper losses.

2. Iron Losses:

Iron losses occur due to magnetic hysteresis and eddy currents in the motor’s iron core. These losses result in the conversion of electrical energy into heat. Using high-quality laminated iron cores and minimizing magnetic flux variations can help reduce iron losses and improve efficiency.

3. Friction and Windage Losses:

Friction and windage losses occur due to mechanical friction between moving parts and air resistance. These losses result in the conversion of mechanical energy into heat. Proper lubrication, efficient bearing systems, and aerodynamically optimized designs can help minimize friction and windage losses.

4. Brush and Commutator Losses:

In brushed DC motors, brush and commutator losses occur due to the friction and electrical resistance at the brush-commutator interface. These losses result in the conversion of electrical energy into heat. Using high-quality brushes and commutators, reducing brush voltage drop, and minimizing the number of commutator segments can help reduce these losses.

5. Magnetic Field Design:

The design of the magnetic field in the motor significantly affects its efficiency. Optimizing the magnetic field for the specific application, such as selecting appropriate magnet materials or designing efficient electromagnets, can improve the motor’s efficiency.

6. Motor Load:

The load on the motor, including the torque and speed requirements, can impact its efficiency. Operating the motor close to its optimal load conditions or utilizing speed control techniques, such as pulse width modulation (PWM), can help improve efficiency by reducing unnecessary power consumption.

7. Motor Size and Construction:

The size and construction of the motor can influence its efficiency. Properly sizing the motor for the intended application and optimizing the design for reduced losses, improved cooling, and efficient heat dissipation can enhance overall efficiency.

It’s important to note that the efficiency of a DC motor is typically highest at or near its rated load conditions. Deviating significantly from the rated load can result in reduced efficiency.

In summary, the efficiency of a DC motor is determined by comparing the output power to the input power. Factors such as copper losses, iron losses, friction and windage losses, brush and commutator losses, magnetic field design, motor load, and motor size and construction can all influence the efficiency of a DC motor. By considering and optimizing these factors, the overall efficiency of the motor can be improved.

dc motor

What are the environmental implications of using DC motors, particularly in green technologies?

DC (Direct Current) motors offer several environmental benefits when used in green technologies. Their characteristics and operational advantages contribute to reducing environmental impact compared to other motor types. Here’s a detailed explanation of the environmental implications of using DC motors, particularly in green technologies:

1. Energy Efficiency:

DC motors are known for their high energy efficiency. Compared to AC (Alternating Current) motors, DC motors generally have lower energy losses and can convert a larger proportion of electrical input power into mechanical output power. This increased efficiency results in reduced energy consumption, leading to lower greenhouse gas emissions and decreased reliance on fossil fuels for electricity generation.

2. Renewable Energy Integration:

DC motors are well-suited for integration with renewable energy sources. Many green technologies, such as solar photovoltaic systems and wind turbines, produce DC power. By utilizing DC motors directly in these systems, the need for power conversion from DC to AC can be minimized, reducing energy losses associated with conversion processes. This integration improves the overall system efficiency and contributes to a more sustainable energy infrastructure.

3. Battery-Powered Applications:

DC motors are commonly used in battery-powered applications, such as electric vehicles and portable devices. The efficiency of DC motors ensures optimal utilization of the limited energy stored in batteries, resulting in extended battery life and reduced energy waste. By utilizing DC motors in these applications, the environmental impact of fossil fuel consumption for transportation and energy storage is reduced.

4. Reduced Emissions:

DC motors, especially brushless DC motors, produce fewer emissions compared to internal combustion engines or motors that rely on fossil fuels. By using DC motors in green technologies, such as electric vehicles or electrically powered equipment, the emission of greenhouse gases and air pollutants associated with traditional combustion engines is significantly reduced. This contributes to improved air quality and a reduction in overall carbon footprint.

5. Noise Reduction:

DC motors generally operate with lower noise levels compared to some other motor types. The absence of brushes in brushless DC motors and the smoother operation of DC motor designs contribute to reduced noise emissions. This is particularly beneficial in green technologies like electric vehicles or renewable energy systems, where quieter operation enhances user comfort and minimizes noise pollution in residential or urban areas.

6. Recycling and End-of-Life Considerations:

DC motors, like many electrical devices, can be recycled at the end of their operational life. The materials used in DC motors, such as copper, aluminum, and various magnets, can be recovered and reused, reducing the demand for new raw materials and minimizing waste. Proper recycling and disposal practices ensure that the environmental impact of DC motors is further mitigated.

The use of DC motors in green technologies offers several environmental benefits, including increased energy efficiency, integration with renewable energy sources, reduced emissions, noise reduction, and the potential for recycling and end-of-life considerations. These characteristics make DC motors a favorable choice for sustainable and environmentally conscious applications, contributing to the transition to a greener and more sustainable future.

China Standard CHINAMFG D155L210 Water-Cooling 45kw DC Electric Motor with Encoder for Outboard Motor   vacuum pump distributorsChina Standard CHINAMFG D155L210 Water-Cooling 45kw DC Electric Motor with Encoder for Outboard Motor   vacuum pump distributors
editor by CX 2024-04-30