China wholesaler CHINAMFG 48V 160kv D85L165 Waterproof Electric Motor 10kw vacuum pump brakes

Product Description


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

1. The case is made of light, high strength 7075 alloy with blaster and black hard anodizing to prevent it from oxidation and corrosion.

2. High quality ball bearing ,very low noise and vibration.
3. The rotor has good dynamic balance,the vibration of the motor is very low .
4. The magnets have very high magnet strength and temperature limit can reach up to 150° .
5. H-grade ,high temperature copper wires with high insulation .
6. High power density ,High torque, high efficiency and high RPM .
7. Water-proof and water cooling .
8. The shaft is made of SS316 stainless steel, which enables it to work in seawater without corrosion.

With an advanced 10-pole encapsulated core and 85mm

diameter, this series compact DC motors deliver high torque up to

30 N.M with maximum output power at 20KW.

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 dusty


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



Drawing Dimension


Wiring Diagram


Product Parameters

Variants D85L165-165 D85L165-143 D85L165-115 D85L165-95 D85L165-72
Winding turn & connection 3T-D 2T-Y 2.5T-Y 3T-Y 4T-Y
LiPO/voltage Range 8-16S  (28-67.2V) 10-18S (32-75.6V) 12-22S (38-92.4V) 12-28S (38-117.6V) 14-36S (45-151.2V)
Max RPM 11,088  10,810  10,810  11,172  10,886 
Speed Constant KV(RPM/V) 165 143 115 95 72
 Torque Constant Kt (N*M/A) 0.0656  0.571  0.0904  0.1085  0.1447 
NO Loading Current at 8.4V(A) 4.5  3.9  3.0  2. 5 2.1 
Maximum Output Power (KW) 20.0  19.8  19.5  19.0  18.6 
Peak Current (A)  470 410 330 310 210
Effeciency 91.00% 91.00% 91.00% 92.00% 92.00%
Max Torque at60% (N*M) 30.0  30.0  30.0  30.0  29.0 
Continuous working current(A) 220.0  185.0  150.0  125.0  95.0 
Weight(kg) 3.80  3.90  3.90  3.85  3.76 
Construction 12N/10P
Cooling Solution water cooling
Max working temperature 120ºC
Dimension D85*L165mm
Shaft extension D10*L30mm
Lead wires extension 150±5MM
Insulation voltage & leak current AC500V/10MA/3S
Plug 10mm CHINAMFG plug
Life Span(hrs) 10,000 


Auto Dyno Testing


Motor Efficiency Nephogram



Auto Test Report

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Application: Personal Watercraft /Water Toys
Operating Speed: Adjust Speed
Excitation Mode: Permanent Magnet
US$ 520/Piece
1 Piece(Min.Order)


Order Sample

KV, Torque, Power, Voltage


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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

electric motor

What maintenance practices are essential for prolonging the lifespan of an electric motor?

Maintaining electric motors is crucial for prolonging their lifespan and ensuring optimal performance. Proper maintenance practices help prevent failures, minimize downtime, and maximize the efficiency and reliability of electric motors. Here’s a detailed explanation of essential maintenance practices for prolonging the lifespan of an electric motor:

  1. Regular Inspections: Conduct regular visual inspections of the motor to identify any signs of wear, damage, or loose connections. Inspect the motor’s external components, such as the housing, bearings, cooling fans, and cables. Look for any unusual noise, vibration, or overheating during operation, as these can indicate potential issues that require attention.
  2. Lubrication: Proper lubrication is vital for the smooth operation and longevity of electric motors. Follow the manufacturer’s guidelines for lubrication intervals and use the recommended lubricants. Apply lubrication to bearings, shafts, and other moving parts as specified. Over-lubrication or using incompatible lubricants can cause overheating and premature wear, so it’s essential to follow the recommended practices.
  3. Cleaning: Keep the motor clean and free from dirt, dust, and debris that can accumulate over time. Regularly clean the motor’s exterior using a soft brush or compressed air. Ensure that cooling vents and fans are clear of any obstructions to maintain proper airflow and prevent overheating. Cleanliness helps prevent insulation damage and improves heat dissipation.
  4. Alignment and Balance: Misalignment or imbalance in the motor’s shaft and coupling can lead to excessive vibrations and premature wear. Regularly check and correct any misalignment or imbalance issues using precision alignment tools. Proper alignment and balance reduce stress on bearings and extend their lifespan, contributing to the overall longevity of the motor.
  5. Temperature Monitoring: Monitor the motor’s temperature during operation using temperature sensors or thermal imaging techniques. Excessive heat can damage insulation, bearings, and other components. If the motor consistently operates at high temperatures, investigate the cause and take corrective actions, such as improving ventilation, reducing loads, or addressing any cooling system issues.
  6. Electrical Connections: Inspect and tighten electrical connections regularly to ensure secure and reliable connections. Loose or corroded connections can lead to voltage drops, increased resistance, and overheating. Check terminal blocks, wiring, and motor leads for any signs of damage or degradation. Properly torquing electrical connections and addressing any issues promptly helps maintain electrical integrity.
  7. Vibration Analysis: Perform regular vibration analysis to detect any abnormal vibration patterns that could indicate underlying issues. Vibration analysis tools and techniques can help identify unbalanced rotors, misalignment, bearing wear, or other mechanical problems. Addressing vibration issues early can prevent further damage and improve motor performance and longevity.
  8. Periodic Testing and Maintenance: Conduct periodic testing and maintenance based on the manufacturer’s recommendations and industry best practices. This may include insulation resistance testing, winding resistance testing, bearing lubrication checks, and other diagnostic tests. Such tests help identify potential problems before they escalate and allow for timely maintenance and repairs.
  9. Training and Documentation: Ensure that maintenance personnel are properly trained in electric motor maintenance practices. Provide training on inspection techniques, lubrication procedures, alignment methods, and other essential maintenance tasks. Maintain comprehensive documentation of maintenance activities, including inspection reports, maintenance schedules, and repair records.

By implementing these maintenance practices, motor owners can significantly prolong the lifespan of electric motors. Regular inspections, proper lubrication, cleaning, alignment, temperature monitoring, electrical connection maintenance, vibration analysis, periodic testing, and training contribute to the motor’s reliability, efficiency, and overall longevity.

electric motor

What advancements in electric motor technology have improved energy efficiency?

Advancements in electric motor technology have played a crucial role in improving energy efficiency, leading to more sustainable and environmentally friendly applications. Here’s a detailed explanation of some key advancements in electric motor technology that have contributed to enhanced energy efficiency:

  1. High-Efficiency Motor Designs: One significant advancement in electric motor technology is the development of high-efficiency motor designs. These designs focus on reducing energy losses during motor operation, resulting in improved overall efficiency. High-efficiency motors are engineered with optimized stator and rotor geometries, reduced core losses, and improved magnetic materials. These design enhancements minimize energy wastage and increase the motor’s efficiency, allowing it to convert a higher percentage of electrical input power into useful mechanical output power.
  2. Premium Efficiency Standards: Another notable advancement is the establishment and adoption of premium efficiency standards for electric motors. These standards, such as the International Electrotechnical Commission (IEC) IE3 and NEMA Premium efficiency standards, set minimum efficiency requirements for motors. Manufacturers strive to meet or exceed these standards by incorporating innovative technologies and design features that enhance energy efficiency. The implementation of premium efficiency standards has led to the widespread availability of more efficient motors in the market, encouraging energy-conscious choices and reducing energy consumption in various applications.
  3. Variable Speed Drives: Electric motor systems often operate under varying load conditions, and traditional motor designs operate at a fixed speed. However, the development and adoption of variable speed drives (VSDs) have revolutionized motor efficiency. VSDs, such as frequency converters or inverters, allow the motor’s speed to be adjusted according to the load requirements. By operating motors at the optimal speed for each task, VSDs minimize energy losses and significantly improve energy efficiency. This technology is particularly beneficial in applications with variable loads, such as HVAC systems, pumps, and conveyors.
  4. Improved Motor Control and Control Algorithms: Advanced motor control techniques and algorithms have contributed to improved energy efficiency. These control systems employ sophisticated algorithms to optimize motor performance, including speed control, torque control, and power factor correction. By precisely adjusting motor parameters based on real-time operating conditions, these control systems minimize energy losses and maximize motor efficiency. Additionally, the integration of sensor technology and feedback loops enables closed-loop control, allowing motors to respond dynamically and adaptively to changes in load demand, further enhancing energy efficiency.
  5. Use of Permanent Magnet Motors: Permanent magnet (PM) motors have gained popularity due to their inherent high energy efficiency. PM motors utilize permanent magnets in the rotor, eliminating the need for rotor windings and reducing rotor losses. This design enables PM motors to achieve higher power densities, improved efficiency, and enhanced performance compared to traditional induction motors. The use of PM motors is particularly prevalent in applications where high efficiency and compact size are critical, such as electric vehicles, appliances, and industrial machinery.
  6. Integration of Advanced Materials: Advances in materials science have contributed to improved motor efficiency. The utilization of advanced magnetic materials, such as rare-earth magnets, allows for stronger and more efficient magnetic fields, resulting in higher motor efficiency. Additionally, the development of low-loss electrical steel laminations and improved insulation materials reduces core losses and minimizes energy wastage. These advanced materials enhance the overall efficiency of electric motors, making them more energy-efficient and environmentally friendly.

The advancements in electric motor technology, including high-efficiency motor designs, premium efficiency standards, variable speed drives, improved motor control, permanent magnet motors, and advanced materials, have collectively driven significant improvements in energy efficiency. These advancements have led to more efficient motor systems, reduced energy consumption, and increased sustainability across a wide range of applications, including industrial machinery, transportation, HVAC systems, appliances, and renewable energy systems.

electric motor

Can you explain the basic principles of electric motor operation?

An electric motor operates based on several fundamental principles of electromagnetism and electromagnetic induction. These principles govern the conversion of electrical energy into mechanical energy, enabling the motor to generate rotational motion. Here’s a detailed explanation of the basic principles of electric motor operation:

  1. Magnetic Fields: Electric motors utilize magnetic fields to create the forces necessary for rotation. The motor consists of two main components: the stator and the rotor. The stator contains coils of wire wound around a core and is responsible for generating a magnetic field. The rotor, which is connected to the motor’s output shaft, has magnets or electromagnets that produce their own magnetic fields.
  2. Magnetic Field Interaction: When an electric current flows through the coils in the stator, it generates a magnetic field. This magnetic field interacts with the magnetic field produced by the rotor. The interaction between these two magnetic fields results in a rotational force, known as torque, that causes the rotor to rotate.
  3. Electromagnetic Induction: Electric motors can also operate on the principle of electromagnetic induction. In these motors, alternating current (AC) is supplied to the stator coils. The alternating current produces a changing magnetic field that induces a voltage in the rotor. This induced voltage then generates a current in the rotor, which creates its own magnetic field. The interaction between the stator’s magnetic field and the rotor’s magnetic field leads to rotation.
  4. Commutation: In certain types of electric motors, such as brushed DC motors, commutation is employed. Commutation refers to the process of reversing the direction of the current in the rotor’s electromagnets to maintain continuous rotation. This is achieved using a component called a commutator, which periodically switches the direction of the current as the rotor rotates. By reversing the current at the right time, the commutator ensures that the magnetic fields of the stator and the rotor remain properly aligned, resulting in continuous rotation.
  5. Output Shaft: The rotational motion generated by the interaction of magnetic fields is transferred to the motor’s output shaft. The output shaft is connected to the load or the device that needs to be driven, such as a fan, a pump, or a conveyor belt. As the motor rotates, the mechanical energy produced is transmitted through the output shaft, enabling the motor to perform useful work.

In summary, the basic principles of electric motor operation involve the generation and interaction of magnetic fields. By supplying an electric current to the stator and utilizing magnets or electromagnets in the rotor, electric motors create magnetic fields that interact to produce rotational motion. Additionally, the principle of electromagnetic induction allows for the conversion of alternating current into mechanical motion. Commutation, in certain motor types, ensures continuous rotation by reversing the current in the rotor’s electromagnets. The resulting rotational motion is then transferred to the motor’s output shaft to perform mechanical work.

China wholesaler CHINAMFG 48V 160kv D85L165 Waterproof Electric Motor 10kw   vacuum pump brakesChina wholesaler CHINAMFG 48V 160kv D85L165 Waterproof Electric Motor 10kw   vacuum pump brakes
editor by CX 2024-04-16