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Quadcopter BLDC Motor Control System with Li-ion Battery

Image of Quadcopter BLDC Motor Control System with Li-ion Battery

Circuit Documentation

Summary

The circuit in question is designed to control four Brushless DC (BLDC) motors using four corresponding Electronic Speed Controllers (ESC). Each ESC is responsible for driving one BLDC motor. The circuit is powered by a single Li-ion 5000mAh battery, which provides the necessary voltage to the ESCs. The ESCs are then responsible for converting the DC power from the battery into three-phase AC power to drive the BLDC motors. The circuit does not include a microcontroller or any embedded code, suggesting that the ESCs are either manually controlled or receive their control signals from an external source not included in the provided documentation.

Component List

BLDC Motors

  • Description: Brushless DC motors are used for high-efficiency and high-torque applications. They require three-phase signals to operate.
  • Purpose: To provide mechanical motion for the application.

Electronic Speed Controllers (ESC)

  • Description: ESCs are electronic circuits that control the speed, direction, and braking of a motor.
  • Purpose: To convert DC power from the battery into three-phase AC power to drive the BLDC motors.

Li-ion 5000mAh Battery

  • Description: A rechargeable lithium-ion battery with a capacity of 5000mAh.
  • Purpose: To supply electrical power to the ESCs and, subsequently, to the BLDC motors.

Wiring Details

BLDC Motors

  • Phase Connections:
    • Each motor has three phases connected to the corresponding M1, M2, and M3 outputs of its respective ESC.

Electronic Speed Controllers (ESC)

  • Power Connections:
    • Battery VCC: Connected to the 11.1V output of the Li-ion battery.
    • Battery GND: Connected to the GND of the Li-ion battery.
  • Motor Connections:
    • M1, M2, M3: Each connected to the corresponding phase of the BLDC motor it controls.
  • Signal Connections:
    • Signal: Not connected (requires an external control signal).
  • Output Connections:
    • 5v out: Not used in this circuit.
    • GND out: Not used in this circuit.

Li-ion 5000mAh Battery

  • Connections:
    • 11.1V: Connected to the Battery VCC of all ESCs.
    • GND: Connected to the Battery GND of all ESCs.

Documented Code

No code has been provided for this circuit. If the ESCs require control signals, the code to generate these signals would be necessary for complete documentation. This code would typically be run on a microcontroller or similar device to provide the PWM (Pulse Width Modulation) signals that control the speed and direction of the BLDC motors via the ESCs. Since no such code is included, it is assumed that the control mechanism is external or manual.


Please note that the actual implementation of the circuit should include safety features such as fuses or current protection circuits, which are not documented here. Additionally, the ESCs may require calibration and configuration to work correctly with the specific BLDC motors used.