What is Gimbal Motor's working principle?

Gimbal motors are the cornerstone of stabilization technology for modern drones, cameras, and robots. They utilize electromagnetic principles and real-time feedback loops to counteract unwanted motion within milliseconds. Let's learn more about gimbal motors with Flash Hobby.

How It Works

Motion Detection: An integrated IMU (Inertial Measurement Unit) detects angular velocity (±4000°/s) and acceleration (±32g) at a frequency of 1kHz.

Real-Time Correction: This data is fed into a PID controller, which calculates torque adjustments within 2ms.

Electromagnetic Drive: A three-phase brushless motor generates counter-torque through the Lorentz force, stabilizing payloads up to 10kg.

Key Components

Stator: 12-18 slots, wound with 0.1mm copper wire (low-speed torque requires at least 80 turns).

Rotor: Multi-pole N52 neodymium magnets (8-14 poles for smooth rotation).

Sensor: Hall-effect encoder with 0.01° positioning accuracy.

Frequently Asked Questions

Q1: What role does the IMU play in gimbal motor operation?

The IMU measures 6-axis motion (3-axis gyroscope + 3-axis accelerometer). When external forces cause the gimbal to tilt, the IMU sends error data to the controller, triggering motor anti-torque within 3 milliseconds.

Q2: Why is the winding method for gimbal motors different from that of standard BLDC motors?

Standard BLDC motors prioritize high speeds (>10,000 RPM). Gimbal motors use thinner wire and have 2-3 times more turns, resulting in higher torque even at speeds below 1000 RPM, which is critical for stability.

Q3: How does pole count affect stability performance?

A high pole count (12-16 poles) reduces cogging torque by 70%, enabling fine-tuning. Our 14-pole motors achieve a step resolution of 0.005°, delivering a cinematic-quality smoothness.

Flash Hobby Gimbal Motor Technical Specifications