Outrunner Brushless DC Motor
Our micro outrunner/outer rotor BLDC motor is designed for applications requiring high torque and efficiency in a compact and lightweight form factor. Ideal for various industries, and provide reliable and long-lasting performance.
We provide a wide range of customization options to meet your specific needs, including:
- Custom Windings: Tailored to your voltage and current requirements.
- Shaft Variations: Different lengths and diameters to fit your design.
- Mounting Options: Various configurations for easy integration.
- Integration: Compatible with various controllers and sensors for seamless operation.
outrunner bldc Structure
- Rotor (Outer Part): Located on the outside, it contains permanent magnets that interact with the stator's magnetic field to produce rotation.
- Stator (Inner Part): The stator, which is stationary, holds copper windings arranged in coils that generate a rotating magnetic field when energized.
- Bearings: High-quality bearings support the rotor and ensure smooth, frictionless rotation around the stator.
- Electronics: The Electronic Speed Controller (ESC) manages the timing and current flow to the stator windings, controlling the motor's speed and torque.
- Cooling: Ventilation holes in the rotor housing help dissipate heat, preventing overheating to maintain optimal performance.
- Mounting Hardware: The motor includes a mounting base and connectors for secure attachment to the application and electrical connections.
By Winding Configuration
Our outrunner BLDC motor offers star and delta winding options for optimized torque at low speeds or maximum high-speed performance.
Star (Y) Winding
- Star winding offers higher torque at low speeds due to its higher phase voltage and lower current draw.
- Used in drones, gimbals, and other precision systems where torque at startup and efficiency are more important.
Delta Winding
- Delta winding provides higher top-end speed and power output thanks to its lower phase voltage and higher current.
- Used in devices like rotary tools, fans, and remote-controlled airplanes that require high speed.
By Commutation Control
Our outrunner BLDC motor offers sensored and sensorless commutation control for reliable startup, precise speed, and high-speed efficiency applications.
Sensorless
- No physical sensors; Uses back-EMF for commutation.
- Simpler and more cost-effective design.
- More reliable in harsh environments (no sensors to fail).
- Ideal for high-speed applications (e.g., drones, fans).
- Requires sophisticated ESC (Electronic Speed Controller) for smooth operation.
Sensored
- Uses Hall sensors or encoders for rotor position detection.
- Excellent startup performance and low-speed torque control.
- Ideal for robotics, e-bikes, and precise speed/position systems.
- Better suited for variable-load conditions.
- Requires sensor feedback wiring and a compatible controller.
From 0 to N - Full Motor Solutions
By Mounting Options
Our outrunner BLDC motor offers versatile mounting options including front, rear, side, shaft, radial clamping, and integrated housing configurations.
Front Mounting
- Mounted using threaded holes or flanges on the front face.
- Common in setups needing rigid surface attachment or machine housing integration.
Rear Mounting
- The motor is mounted via its rear face, allowing the rotor and shaft to extend outward.
- The ideal choice for rotor-side load mounting applications, such as robotic arms or conveyor belt systems.
Side Mounting
- Brackets or custom frames are used to secure the motor sideways.
- Used where flexible motor positioning is needed, like fans or automation systems.
Integrated Mounting with Housing
- Motor casing integrates mounting and assembly for streamlined, compact system installation.
- Common in high-performance devices prioritizing aesthetics and protection, such as HVAC systems&e-bikes.
Radial Clamping
- The motor is clamped radially along its body without using the faceplate.
- Ideal for drones or lightweight applications where the motor needs quick detachment.
Shaft Mounting
- The motor is secured to the driven shaft directly, often using a coupling mechanism.
- Suited for direct-drive systems like CNC machines, fans, and pumps.
Customer Case
A European smart gardening brand sought a compact yet powerful steering solution for its next-generation robotic lawn mower. Key requirements included:
- Quiet operation for residential use
- Precise control for sharp turns and path correction
- High torque at low RPM
- Compact form factor for integration in a small chassis
Our engineers conducted design research and configured:
- Motor Type: Outer rotor BLDC motor
- Gearbox: Parallel shaft gearbox
- Rated Voltage: DC 24V
- Rated Torque: 2 Nm
- No-load Speed: 20 RPM±5%
- Load Current: 0.5 A ±5%
- IP Rating: IPX7
System Integration
- The motors are controlled via a central microcontroller. It works in sync with the following devices:
- IMU (Inertial Measurement Unit): for real-time position correction
- Wheel encoders: for precise path tracking
Results
- After switching to the outer rotor + gearbox setup, the company reported:
- 25% increase in navigation accuracy
- 30% reduction in power consumption
- 15% smaller motor compartment design
- User-reported satisfaction improved by 40% due to quieter operation
Applications
Drones and Quadcopters
- High torque and efficient cooling provide stable flight and enhanced maneuverability.
RC Aircraft
- Offers the necessary thrust and efficiency for lightweight model aircraft.
Camera Gimbals
- Provides smooth and precise motor control for stabilization systems.
Robotic Arms
- Ideal for small robots requiring precise movement and control.
Wearable Devices
- Used in advanced wearables for haptic feedback and actuation.
Medical Prosthetics
- Essential for compact, lightweight medical devices requiring precise actuation.
DIY Electronics
- Widely favored in hobbyist projects for creating custom gadgets and models.
Small Actuators
- Ideal for applications needing high torque and precision in small-scale actuators.
FAQ
How does the efficiency of outrunner brushless motor compare to inrunner motors?
Outrunner motors generally have higher torque efficiency, making them suitable for applications requiring high power at lower speeds. Inrunner motors, on the other hand, are more efficient at higher speeds.
Can outrunner bldc motor be used in high-speed applications?
While outrunner motors excel in high-torque, lower-speed applications, they can still be used in high-speed applications, but inrunner motors are typically more suited for such tasks.
How do I choose the right brushless dc outrunner motor for my project?
Consider the required torque, speed (RPM), size constraints, and cooling needs of your application. Matching these parameters with the motor’s specifications will help you choose the right one.
Are outrunner brushless motors waterproof?
Not all outrunner motors are waterproof. If you need a waterproof motor, look for models specifically designed for wet or marine environments.
How do outer rotor brushless dc motor handle heat dissipation?
The rotating outer shell of outrunner motors helps in effective heat dissipation, allowing them to maintain performance and longevity even under continuous use.
What power sources are compatible with outrunner brushless motors?
They are typically compatible with a variety of power sources, including batteries and DC power supplies, depending on the voltage and current requirements of the motor.
Is it possible to control an micro outrunner brushless motor with a standard ESC (Electronic Speed Controller)?
Yes, but it’s important to match the ESC specifications with the motor’s voltage and current requirements to ensure optimal performance and avoid damage.
What is the typical efficiency range of an outrunner brushless motor?
The efficiency of outrunner brushless motors can vary but generally ranges from 80% to 90%, depending on the design and application.
