Product overview
The Nanchang Changkong Technology CKESC Breeze 25A FOC controls brushless propulsion using FOC drive and vfast observer technology. Its compact body measures 42.5 × 18 × 6.5mm, with a wiring-inclusive weight of 11.2g. The electrical configuration combines a 3~4S input with a 5V 2A switching step-down BEC, 75mm input leads and 70mm output leads, both 18AWG. Serial control and output are customization options. Integration must accommodate the controller, its wiring and adequate cooling to support the 25A continuous rating.
The 30A peak-current rating applies to a 3S supply. Protection functions address unsuccessful starts, stalls, excessive current, overload, temperature, signal loss and battery depletion. Above 120°C, maximum power progressively falls, potentially to 40% of full-throttle power, and recovers as temperature drops. A high-throttle stall can still damage the controller. Installation requires suitable motor, propeller and voltage matching, plus throttle calibration before first use or a transmitter change. Its regenerative operation also requires a supply capable of absorbing returned energy; battery power is preferred.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Nanchang Changkong Technology, CKESC Breeze 25A FOC model-aircraft electronic speed controller |
| Nominal specification | 25A, 3~4S |
| Control technology | Vfast observer technology |
| Motor drive | FOC drive with an efficient algorithm, motor adaptability, high thrust efficiency, low noise and improved throttle linearity |
| Serial interface | Serial control and output available through customizationCustom configuration. |
| Input voltage | 3~4S |
| Dimensions | 42.5 × 18 × 6.5mm |
| Weight | 11.2gIncluding wiring. |
| BEC | 5V 2A switching step-down BEC |
| Maximum continuous operating current | 25AWith good cooling. |
| Peak current | 30A3S supply. |
| Input wiring | 75mm, 18AWG |
| Output wiring | 70mm, 18AWG |
| Low-voltage startup protection | Prevents motor startupSupply voltage below the permitted value. |
| High-voltage startup protection | Prevents motor startupSupply voltage above the permitted value. |
| Startup protection | Limits startup current and automatically retries startingUnsuccessful 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 down to 40% of full-throttle powerTemperature exceeds 120°C; original power is restored after temperature falls. |
| Overcurrent protection | Limits peak current to prevent exceeding its limit |
| Overload protection | Limits maximum throttle to protect the propulsion systemExcessive motor load is detected. |
| Signal-loss protection | Begins reducing output power, rapidly lowers 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 travel must be calibrated for accurate controlBefore first use or changing the transmitter or throttle-signal device. |
| Propulsion matching | Mismatched motors, propellers, non-propeller or varying loads, or incorrect voltage may impair performance or damage the ESCAircraft installation. |
| Stall response requirement | Use a stable load; close the throttle or disconnect power promptly to prevent damage from excessive stall currentPropeller externally stalled. |
| Regenerative energy requirement | FOC operation returns energy to the supply; battery power is preferred, and inadequate energy absorption can damage the ESCPower supply must absorb sufficient regenerated energy; during DC-supply testing, avoid rapid throttle reduction. |
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