3700W 130KV Sensorless Waterproof BLDC Motor, IP68

High-quality IP68 waterproof brushless DC motor for sale, rated at 3.7kW, compatible with 6–20S batteries, 130KV speed rating. This sensorless waterproof BLDC motor is ideal for underwater thrusters, electric surfboards, and boats.

Specification

ESC (Electronic Speed Controller) Selection for Waterproof BLDC Motor

• A BLDC motor can be used with an ESC as long as its speed does not exceed the ESC’s limit.
• BLDC motor speed = Battery Voltage × KV value;
  Stator speed = Battery Voltage × KV value × Pole Pairs.
• The maximum speed limit of the V4 series ESC is 60,000 ERPM.
  The maximum speed limit of the V6 series ESC is 150,000 ERPM.
• If a BLDC motor’s maximum speed surpasses the ESC’s limit, it is possible to match them by lowering the motor’s operating voltage. However, this is not recommended, as it prevents the motor from functioning as a true brushless DC motor.

ESC (Electronic Speed Controller) Specification

Note: The ESC model with * is the recommended controller for this page of motor, if you need other ESC models, please contact us.

Details

Dimension (Unit: mm)

Applications

Jet Ski

Propeller

Robot Model

Electric Surfboard

Q: What is a sensorless BLDC motor?

A: A sensorless BLDC (Brushless DC) motor is a type of electric BLDC motor that operates without physical sensors to detect rotor position. Instead, it estimates the rotor’s position using the back electromotive force (back-EMF) generated in the stator windings, allowing the motor controller to efficiently commutate the motor phases. Sensorless BLDC motors are simpler, more robust, and often used in applications where reliability and low maintenance are important, such as electric scooters, drones, and waterproof motors.