T-Motor AM66A + AM Link 3D 3-6S Fixed Wing ESC Electronic Speed Controller with Telemetry & UBEC

Overview

The T-Motor AM66A is a fixed wing ESC (electronic speed controller) designed for 3D and fixed-wing aircraft, and can match AM480 and AT/AS 28 series motors. It supports flight data collection and telemetry for monitoring flight status.

Key Features

• High efficiency and high power UBEC
• Zero latency, high precision follow-up
• Comprehensive flight data collection and telemetry
• 32-bit ARM microprocessor with up to 48MHz operating frequency
• BLHeli-32 firmware (third generation BLHeli, following BLHeli and BLHeli-S)
• Damped light mode (regenerative braking, fast motor deceleration, and active freewheeling)
• Feature support to help prevent sync loss, with tuneable parameters
• Throttle modes: normal PWM, OneShot125, OneShot42, MultiShot
• Digital throttle modes: DShot150/300/600/1200
• Beacon functionality (ESC can beep after a set time at zero throttle)
• Integrated BEC: continuous 10A / instant 20A; output voltage switchable between 5.8V, 7.4V, 8.2V

For customer service and product support, contact support@rcdrone.top or visit https://rcdrone.top/.

Specifications

Interface Definition

• Throttle signal lines (white, red, black long lines): Insert the receiver throttle channel or the flight control throttle. The white line is used to transmit the throttle signal, while the red and black lines are the output lines of the BEC.
• Telemetry data lines (orange, red, brown long lines): The orange lines are used for telemetry output signals, while the red and brown lines are the output lines of the BEC.

BEC Debugging Tutorial (as shown)

• Turn on the blue light in the red circle of Figure 1, turn off the other two lights, then click Write Setup write; the output is 5.8V.
• Turn on the red light in the red circle of Figure 2, turn off the other two lights, then click Write Setup write; the output is 7.4V.
• Turn on the green light in the red circle of Figure 3, turn off the other two lights, then click Write Setup write; the output is 8.2V.

Adjustable Parameters (as shown)

1. Rampup power: Maximum power allowed during rampup; can be set to relative values from 3 to 150%. During startup, applied power depends on throttle input; minimum level is a quarter of the maximum level. Affects bidirectional operation by limiting power during direction reversal. For low RPMs, maximum power to the motor is limited to facilitate detection of low BEMF voltage. Starting with version 16.1 at low RPMs, the lower the startup power setting, the lower the maximum power.
2. Temperature Protection: Can be enabled or disabled.
3. Low RPM Power Protect: Power limiting for low RPMs can be enabled or disabled. Disabling it can be necessary to achieve full power on some low kV motors running on a low supply voltage.
4. Low Voltage Protection: Can be set between 2.5V and 4.0V per lipo cell. When enabled, it limits power applied to the motor if the battery voltage drops below the programmed threshold.
5. Current Protection: Can be enabled to limit current. When enabled, current is limited to the programmed value; reaction time is fast, so current is also limited during accelerations.
6. Sine Modulation Mode: On/off, throttle sine mode output.
7. Motor Direction: Can be set to fwd, rev, bidirectional fwd, and bidirectional rev. In bidirectional mode, center throttle is zero; above is forward rotation and below is reverse rotation. When bidirectional operation is selected, throttle calibration is disabled.
8. Demag Compensation: Protects from motor stalls caused by long winding demagnetization time after commutation. Detects when a demag situation occurs and proceeds with a predicted timing; motor power is cut off some time before the next commutation. Higher values generally provide better protection; if set too high, maximum power can be somewhat reduced for some motors.
9. Motor Timing: Can be set between approximately 1-30°. A medium setting typically works; if motor stutters, adjust the angle.
10. Maximum Acceleration: The maximum acceleration of throttle changes.
11. Current Sense Calibration: Current adjustment to detect the offset value.
12. Auto Telemetry: If disabled, the telemetry function is disabled.
13. Minimum Throttle, Maximum Throttle, Center Throttle: Sets the throttle range of the ESC. Center throttle is only used for bidirectional operation. Values given are for a normal 1000-2000us input signal; for other input signals, these values must be scaled.
14. Brake On Stop: Can be turned on or off. When on, brake force is applied when throttle is zero; for nonzero throttle, this setting has no effect.
15. Non Damped Mode: Turn on/off Non Damped Mode.
16. Stall Protection: Turn on/off. When the motor stalls, it reduces the throttle to protect the motor and ESC.
17. Startup Beep Volume: Startup beep volume during running.
18. Beacon/Signal Volume: Sets the volume of beeps; the ESC will start beeping if the throttle signal has been zero for a given time.
19. Beacon delay: Sets the delay before beacon beeping starts.
20. PWM Frequency: Motor PWM drive frequency can be programmed.
21. Music Note Config: Music note configuration for switching ESC.

Applications

• 3D aircraft
• Fixed-wing aircraft

Details

The T-Motor AM66A ESC with AM Link supports telemetry readouts like voltage, current, temperature, RPM, and mAh for easier flight monitoring.

The AM66A ESC uses BLHeli_32 32-bit control with an STM32F051 processor running up to 48MHz for responsive motor output.

The AM66A ESC supports BLHeli-32 with PWM, Oneshot and DShot150/300/600/1200 throttle modes, plus a 10A continuous/20A peak BEC with selectable 5.8V, 7.4V or 8.2V output.

AM66A ESC wiring uses separate throttle signal leads and telemetry data leads, and supports BLHeliSuite32 setup via an AM Link Type‑C connection.

T-Motor AM66A ESC settings in BLHeliSuite indicate a 5.8V BEC output option controlled through the LED settings.

BLHeliSuite32 settings for the T-Motor AM66A allow adjustments like throttle calibration, PWM frequency, and auto telemetry, with a note indicating 7.4V output when enabled.

T-Motor AM66A ESC parameters can be adjusted in BLHeliSuite32, including throttle calibration, motor timing, protection limits, and PWM frequency.

Adjustable ESC settings include rampup power, temperature protection, and low RPM power protect for setup tuning.

AM66A ESC setup includes adjustable low-voltage and current protection, a sine modulation on/off option, and configurable motor direction.

Demag compensation and motor timing (about 1–30°) provide adjustable parameters to help address stutter or stalls during throttle changes.

AM66A ESC setup options include maximum acceleration, current sense calibration, auto telemetry, throttle range settings, and brake on stop.

The ESC supports adjustable options like stall protection, startup and beacon beep volume, beacon delay, and PWM frequency.

The throttle range calibration process walks through power-on, full throttle recognition, minimum throttle recognition, and completion confirmation.

The included precautions outline safe wiring, insulation, motor blockage avoidance, heat management, and battery disconnection practices for ESC use.

The AM Link telemetry card uses a three-digit display and a single parameter key, with clearly marked receiver and ESC signal connections.

The AM66A ESC menu lets you set motor pole count (default 28), choose a telemetry ID (0–27), and select receiver type (FrSky or Futaba) using the KEY button.

The AM66A ESC housing includes mounting ears and a compact footprint with dimensions called out for easier installation planning.

The AM66A ESC measures 56.6×38.8×18.5mm, weighs 63.4g including cables, and lists 80mm motor leads, 140mm power leads, and a 290mm signal cable.

T-Motor AM66A ESC performance specs list 66A rated current, 86A peak current, 3–6S LiPo support, and 5.8–8.2V output voltage.

The T-Motor AM66A ESC comes with an AM Link module for connection and setup, with clearly labeled ESC x1 and AM Link x1 in the box.