MUWEIDU L4020 Motor 12V 450rpm Brushless DC Servo Motor, RS485/CAN, 15/18-bit Encoder, 65g
MUWEIDU L4020 Motor 12V 450rpm Brushless DC Servo Motor, RS485/CAN, 15/18-bit Encoder, 65g
MUWEIDU
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Overview
MUWEIDU L4020 Motor is a low-speed, high-precision brushless DC servo motor with an integrated electric drive system, designed for speed/position control in robotics and automation. It supports RS485 or CAN communication and offers encoder options of 15-bit or 18-bit. For pre-sales and integration questions, contact support@rcdrone.top or visit https://rcdrone.top/.
Key Features
- Series of low-speed & high-precision brushless DC motors (servo motors)
- Hollow-shaft design
- Stable & smooth operation
- CE certified
- Integrated high precision; lightweight construction; high torque performance
- Meets the requirements of low-speed and high-precision position control
- High-performance 32-bit MCU: MS Series fully compatible with all control commands of the MF Series
- Outer rotor multi-stage flattened design for higher torque in space-constrained applications
- Brushless structure with high-performance bearings for smoother rotation and longer service life
- High-precision, low-temperature-drift alloy resistors for accurate current sampling and control
- Full N-channel three-phase full-bridge drive with low internal resistance and high current output
- Supports seamless switching between torque open-loop, speed, and position control modes
- One-time calibration, zero position never lost
Applications
- Humanoid robots
- Robotic arms
- Exoskeletons
- Quadruped robots
- AGV vehicles
- ARU robots
- 360° camera
- Handheld camera
- LiDAR
- Gimbal
Specifications
| Model | L4020 |
| Rated voltage | 12V |
| Rated current | 0.65A |
| Peak power | 3.4W |
| Rated torque | 0.07 N.m |
| Peak torque | 0.1 N.m |
| Rated speed | 450 rpm |
| Encoder | 15-bit or 18-bit |
| Rotor inertia | 52 gcm² |
| Motor temperature monitoring | YES |
| Control modes | Speed/Position |
| Communication protocol | RS485 or CAN |
| Overall dimensions | Φ39.6 mm x 23 mm |
| Weight | 65 g |
Drive / Control (as stated)
- Input voltage: 12~60V
- Bus communication: CAN or RS485
- Main control: 32-bit MCU with 72 MHz operating frequency
- Precision feedback: 18-bit single-turn absolute encoder
Control Modes (PC-based parameter tuning / testing / firmware upgrade available)
- Torque Mode
- Speed Mode
- Multi-Turn Control Mode
- Single-Turn Position + Direction Mode
- Incremental Position Mode
- Multi-Turn Control Mode (with speed limit)
- Single-Turn Position + Direction Mode (with speed limit)
- Incremental Position Mode (with speed limit)
Encoder Motor (15-bit vs 18-bit) — Additional Listed Parameters
| Parameter | 15-bit Encoder Motor | 18-bit Encoder Motor |
|---|---|---|
| Name | L4020 | |
| Driver model | D540v3 | D540v3 |
| Encoder resolution (bit) | 15 | 18 |
| Encoder accuracy (°) | 0.02 | 0.005 |
| Encoder magnet | Hollow Magnet | Hollow Magnet |
| Slip ring compatible | YES | NO |
| Open-loop control frequency | 24 KHz | |
| Speed loop control frequency | 8 KHz | |
| Position loop control frequency | 8 KHz | |
| Drive PWM frequency | 24 KHz | |
| Bus type | RS485 or CAN | |
| RS485 baud rate | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 1 Mbps, 2 Mbps | |
| CAN baud rate | 100K, 125K, 250K, 500K, 1 Mbps | |
Interface Definition (CAN/RS485)
Connector pins are labeled: B, A, V-, V-, V+, V+, T, R, G. An ID SWITCH is provided.
| Interface | Note |
|---|---|
| B/L | RS485-B or CAN-L |
| A/H | RS485-A or CAN-H |
| V- | Negative power supply |
| V- | Negative power supply |
| V+ | Positive power supply |
| V+ | Positive power supply |
| T | UART transmitter |
| R | UART receiver |
| G | Signal GND |
Manuals / Documents
Details
Designed for low-speed, high-precision motion control, the L4020 combines a hollow-shaft layout with stable, smooth operation.
An integrated drive system supports low-speed, high-precision position control with a torque-focused outer-rotor structure and durable bearings.
CAN/RS485 bus communication and an onboard 32-bit controller enable flexible speed, torque, and position control setups.
Clear interface labeling helps streamline wiring, with an ID switch and dedicated CAN/RS485 connections for multi-device networks.
PC-based tuning supports testing and firmware upgrades, with encoder options available in 15-bit or 18-bit configurations.
Skip for compact use-case collage where nearby text already lists typical applications.
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