Types of ESC
Selecting the Right ESC Requires Considering Motor Parameters, Application Scenarios, ESC Type, and Safety. Here Are Key Points and Suggestions for Choosing an ESC:
1. Understand Motor Parameters
• Determine the Motor's Maximum Operating Current: This is the foundation for selecting an ESC. The ESC’s continuous current rating must be greater than the motor’s peak current at full throttle.
• Consider a Safety Margin: It is recommended that the ESC’s continuous current capacity be 20%–30% higher than the motor’s actual needs to ensure safety and durability.
2. Choose the ESC Type
• Individual ESCs: Suitable for applications requiring high stability and easy replacement, but wiring can be more complex and weight distribution may be less optimal.
• 4-in-1 ESCs: High integration, simplified wiring, ideal for lightweight and high-performance drones. Currently the mainstream option.
3. Match Frame Mounting Hole Size
• 30.5mm × 30.5mm: Larger size, allows more components on the ESC board, supports higher current loads, typically used in larger drones.
• 20mm × 20mm: Smaller size, higher integration, lighter and more compact, suitable for smaller drones.
4. Consider the Application Scenario
• Racing or High-Performance Flying: Choose ESCs that support high current and fast response, such as those using BLHeli_S or BLHeli_32 firmware.
• General Flying or Cinematic Use: Choose stable and cost-effective ESCs, such as 40A or 50A models.
5. Voltage and Current Capacity
• Voltage Compatibility: Ensure the ESC supports your battery voltage range. For example, if using a 6S battery, the ESC must support 6S input.
• Current Capacity: The ESC’s continuous and burst current must meet or exceed the motor and propeller's peak demands at full throttle. A 15%–20% current buffer is recommended to prevent motor stall or ESC damage due to overload.
6. Brand and Quality
• Choose reputable brands like SpeedyBee to ensure ESC quality and after-sales support.
7. Other Considerations
• Brake Function: An ESC with braking can enhance flight safety and stability.
• Weight and Durability: ESCs with higher current ratings are generally more durable but heavier. Choose ESCs according to your drone's design needs.
Example Recommendations
• For Beginners: SpeedyBee BLS 50A 4-in-1 ESC – high cost performance, suitable for beginners and freestyle pilots.
• For Advanced Users: SpeedyBee BLS 60A 4-in-1 ESC – supports high current and fast response, ideal for racing and high-performance flights.
With these points in mind, you can select an ESC that matches your specific needs and budget.