650W brushless DC motor, waterproof rating IP28, operating voltage 14–37V (compatible with 4–10S batteries). This 140KV outrunner BLDC motor is designed for underwater applications such as electric surfboards, propellers, robotic models, and boosters. Matching controllers and propellers are available. For best value, we recommend purchasing the complete BLDC motor set.
Specification
| Model |
BLDC-F5085 |
| Max Power |
650W |
| Rotation Speed KV (RPM/V) |
140KV |
| Max Input Voltage* |
DC 14-37V |
| No-Load Current |
0.8A |
| Maximum Load Current |
29.5A |
| No-Load Speed |
3100 rpm |
| Motor Dimension |
50*85mm |
| Waterproof Grade |
IP28 |
| Weight |
680g |
Note: The motor is powered by 4-10S batteries, S is the number of batteries, voltage of every battery is 3.7V DC.
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
| Model |
Current Value |
Number of Batteries (Input Voltage) |
| FSESC 4.12 |
Continuous 50A, peak 240A |
3S-12S (8V-60V) |
| FSESC 4.20* |
Continuous 50A, peak 240A |
3S-12S (8V-60V) |
| VESC 6.6 mini dual drive |
1-channel 100A continuous, 2-channel 200A continuous |
3S-12S (8V-60V) |
| 1-channel peak 400A, 2-channel total peak 800A |
| VESC6.6 integrated switch dual drive version |
1-channel 100A continuous, 2-channel 200A continuous |
3S-12S (8V-60V) |
| 1-channel peak 400A, 2-channel total peak 800A |
| FSESC6.6 VESC6.6 single drive integration |
Continuous 60A, peak 150A |
3S-12S (8V-60V) |
| VESC4 dual drive integration |
50A continuous 1-channel, peak 100A 2-channel, peak 300A 2-channel |
3S-12S (8V-60V) |
| ODESC3.6 single drive/dual drive |
50A continuous 1-channel, peak 120A 1-channel |
3S-12S (8V-60V) |
| VESC6 dual drive |
1-channel 100A continuous, 2-channel 200A continuous |
3S-12S (8V-60V) |
| 1-channel peak 400A, 2-channel total peak 800A |
| Single drive V6 75200 |
Continuous 200A |
3S-12S (8V-60V) |
| Single drive VESC6 waterproof version |
Continuous 60A, peak 150A |
3S-12S (8V-60V) |
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
Q: What is the KV rating of a brushless dc motor?
A: The KV rating indicates how many revolutions per minute (RPM) the BLDC motor will spin per volt with no load. For example, a 140KV motor runs at about 140 RPM for every 1 volt applied. Lower KV means more torque and slower speed, while higher KV means less torque but faster speed.
