How many amps of ESC does a 70 ducted motor use? ——Hot topics and data analysis
Recently, there has been a lot of discussion in the community of drone and model aircraft enthusiasts about "matching ESC current for 70 duct motors". This article will answer this question for you through structured data analysis based on the hot topics on the Internet in the past 10 days.
1. Basic parameters of 70 duct motor
70 ducted motors (70mm EDF) are usually used for small and medium-sized aircraft models or drones, and their performance parameters directly affect the selection of ESCs. The following are typical data for common models:
| Motor model | KV value | No-load current(A) | Maximum continuous current (A) |
|---|---|---|---|
| XXD 2835 | 2800KV | 1.2 | 45 |
| RC Lander 2855 | 3200KV | 1.5 | 55 |
| Freewing 2970 | 3500KV | 2.0 | 60 |
2. Core principles for ESC selection
According to recent hot discussions on model aircraft forums, ESC selection needs to follow the following formula:
ESC nominal current ≥ motor maximum continuous current × 1.2 (safety factor)
Taking the Freewing 2970 motor as an example: 60A × 1.2 = 72A, so it is recommended to choose an 80A ESC.
3. Recommended popular ESC models
| brand | Model | continuous current | Peak current | Adaptable battery(S) |
|---|---|---|---|---|
| Hobbywing | FlyFun 80A | 80A | 100A | 2-6S |
| ZTW | Mantis 85A | 85A | 100A | 3-8S |
| Castle | Phoenix Edge 75 | 75A | 90A | 2-6S |
4. Recent user measured data
According to the latest test report of the RCGroups Forum (October 2023):
| test environment | Motor model | Measured maximum current | Recommended ESC |
|---|---|---|---|
| 4S 2200mAh | XXD 2835 | 48.3A | 60A |
| 6S 3300mAh | RC Lander 2855 | 68.7A | 85A |
5. Frequently Asked Questions (Q&A)
Q1: Can I use 100A power to deploy a 70 duct motor?
A: It is possible but not necessary. An oversized ESC will increase weight and cost. It is recommended to choose according to the 1.2 times factor.
Q2: Is the BEC output of the ESC important?
A: If an independent receiver is used for power supply, it can be ignored, but the integrated solution needs to pay attention to the 5V/3A output capability of BEC.
6. Precautions when purchasing
1. Prioritize ESCs that support two-way communication (such as BLHeli firmware)
2. Pay attention to the size of the ESC heat sink matching the installation space.
3. The 6S battery system needs to choose the high-voltage version of the ESC.
Summary:For 70 duct motors, the mainstream choice is 60-85A ESC, which depends on the motor parameters and battery configuration. It is recommended to refer to the manufacturer's data and combine it with actual measurement results to leave a 20% margin to ensure safe operation.
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