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Translating this to a humanoid robot required the design to include some tolerance and compliance at every joint while also being able to keep track of and output torque. Domo's arms have six degrees of freedom, two at the shoulder and four in the arm and wrist. The joints are Series elastic actuators (SEA) driven by custom brushless DC motors.
42 degrees of freedom, 2 legs, DC servo motors 25 November 2009: Tokyo International Robot Exhibition, Japan: TOPIO 3.0 publicly demonstrated: 39 degrees of freedom, 2 legs, Brushless DC servo motors 4–9 February 2010: Nuremberg International Toy Fair, Germany: TOPIO 3.0 publicly demonstrated: 39 degrees of freedom, 2 legs, Brushless DC servo ...
A brushless DC electric motor (BLDC), also known as an electronically commutated motor, is a synchronous motor using a direct current (DC) electric power supply. It uses an electronic controller to switch DC currents to the motor windings producing magnetic fields that effectively rotate in space and which the permanent magnet rotor follows.
The rating of a brushless motor is the ratio of the motor's unloaded rotational speed (measured in RPM) to the peak (not RMS) voltage on the wires connected to the coils (the back EMF). For example, an unloaded motor of K v {\displaystyle K_{\text{v}}} = 5,700 rpm/V supplied with 11.1 V will run at a nominal speed of 63,270 rpm (= 5,700 rpm/V ...
The feet of the robot are modular, meaning they can be removed and replaced for different situations that the robot may be placed in. The avionics and other electrical systems of the Spidernaut are located in what would be its thorax and are made up of brushless DC motor controllers and power and data distributors along with the power source.
In 2009, Adamant Namiki successfully developed the world’s smallest DC brushless motor at 0.6mm in diameter. The company also produces motor units such as its de-energized locking system, micro robot servo, [9] multi-finger robotic hand, and micro mechanisms.
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