Product overview
The CKESC Breeze 40A FOC from Nanchang ChangKong Technology is a motor speed controller for model aircraft propulsion. Its architecture combines field-oriented control, a vfast observer and a switching step-down BEC rated at 5V 3A. The controller measures 47 × 18.5 × 11mm and weighs 24.2g including wiring, providing concrete dimensions for installation planning. Its specified wiring comprises 100mm input leads and 72mm output leads, both 14AWG. Serial control and output are available through customization.
The electrical configuration supports 3~4S power, with a maximum continuous operating current of 40A when cooling is good and a peak rating of 45A on 3S. Protection functions address voltage, startup, stalling, temperature, current, overload, signal loss and battery discharge. These protections have limits: high-throttle stalls can damage the controller, and prolonged heat reduces service life. Installation requires appropriately matched propulsion components and a supply able to absorb regenerated energy. Throttle-range calibration is required before first use and when changing the throttle-signal device.
Specifications
| Specification | Value & conditions |
|---|---|
| Model | CKESC Breeze 40A FOC |
| Product type | Electronic speed controller for model aircraft |
| Drive technology | Field-oriented control (FOC) drive |
| Observer technology | Vfast observer technology |
| Rated specification | 40A 3~4S |
| Supply voltage | 3~4S |
| Dimensions | 47 × 18.5 × 11mm |
| Weight | 24.2gIncluding wiring. |
| BEC | 5V 3A switching step-down BEC |
| Maximum continuous operating current | 40AWith good cooling. |
| Peak current | 45A3S supply. |
| Input wiring | 100mm, 14AWG |
| Output wiring | 72mm, 14AWG |
| Serial interface | Serial control and output can be customizedCustom configuration. |
| Low-voltage protection | Prevents motor startupSupply voltage below the permitted value. |
| High-voltage protection | Prevents motor startupSupply voltage above the permitted value. |
| Startup protection | Limits startup current and automatically retriesUnsuccessful motor startup. |
| Stall protection | Attempts to restart the motorMotor stalls during normal operation; a stall at high throttle may damage the ESC. |
| Overtemperature protection | Gradually reduces maximum output power, potentially to 40% of full-throttle power; restores original power after coolingTemperature exceeds 120°C. |
| Overcurrent protection | Limits peak current to the maximum permitted value |
| Overload protection | Limits maximum throttle to protect the propulsion systemExcessive motor load detected. |
| Signal-loss protection | Gradually reduces output power, brings throttle below 40% within 3 seconds, then slowly reduces throttle until shutdownControl signal lost for 500ms. |
| Battery protection | Gradually limits output throttle to prevent battery overdischarge3S battery below 9.6V or 4S battery below 12.8V. |
| Throttle calibration | Throttle-range calibration requiredBefore first use or changing the transmitter or throttle-signal device. |
| Cooling requirement | Provide good cooling; prolonged high-temperature operation accelerates component aging and substantially reduces service life |
| Propulsion matching | Mismatched motors, propellers, loads or incorrect voltage can reduce performance or damage the ESCAircraft installation. |
| Stalled-propeller response | Use a stable load; promptly close the throttle or disconnect power if the propeller stallsPropeller externally stalled. |
| Regenerative power requirement | Supply must absorb sufficient regenerated energy; battery power is preferred, and rapid throttle reduction should be avoided during DC-supply testing |
| Output-phase connection restriction | Do not use anti-spark connectors on output phase wires or connect or disconnect them while powered |
| Output short-circuit restriction | Do not short output phase wires; doing so may damage the ESCResidual ESC energy has not fully discharged. |
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