mjbots moteus

moteus 驱动器Advanced

An open-source, palm-sized brushless motor driver from mjbots that turns an RC motor into a servo joint.

moteus is a brushless motor controller from the American company mjbots, led by Josh Pieper: it's about the size of a palm and mounts directly behind a motor, turning an ordinary RC-style brushless motor into a servo actuator with controllable position, velocity, and torque. The current r4.11 version supports 10–44V input and 100A peak phase current, integrates an onboard absolute magnetic encoder (to measure rotor angle), and communicates over a 5 Mbps CAN-FD bus (a high-speed fieldbus) so multiple units can be daisy-chained; its firmware is open source under the Apache 2.0 license. Internally it runs field-oriented control (FOC, an algorithm that makes a brushless motor deliver torque smoothly), making it a popular choice for DIY quadrupeds, small humanoids, and robot-arm joints — a common low-cost quasi-direct-drive actuator.

Examplemjbots' own quad A1 quadruped robot drives an outrunner brushless motor at each joint with one moteus board.

Also called: moteus
Related: Servo Drive (Motor Driver) · Field-Oriented Control · Controller Area Network (CAN) · ODrive · Quasi-Direct Drive · Magnetic Encoder
Sources: moteus r4.11 - mjbots
As of: 2026-09