The word "Outrunner" is spelled with the IPA phonetic transcription of /aʊtˈrʌnər/. This word is a compound word made up of "out" and "runner." The first part of the word, "out," is pronounced as the diphthong /aʊ/, which sounds similar to the word "ow." The second part of the word, "runner," is pronounced with the short u sound /ˈrʌnər/. Together, "Outrunner" refers to something that can outrun another, such as a faster runner in a race.
An outrunner refers to an electrical motor design commonly used in various types of applications, particularly in the field of robotics, drones, and other electrically-driven systems. Outrunners are categorized as brushless motors, meaning they lack traditional carbon brushes as found in DC motors. This motor design consists of an outer stationary component, known as the stator, and an inner rotating component, known as the rotor. Unlike traditional inrunner motors where the rotor is fixed to the motor's central shaft, the outrunner motor's rotor surrounds the stator, giving it its distinctive appearance.
The outrunner design offers various advantages such as compactness, favorable torque output, and high efficiency. Additionally, the larger diameter of the outrunner allows for better heat dissipation, making it suitable for applications in which continuous operation is required. Outrunners are known to have higher rotor inertia, which contributes to their ability to generate higher torque at lower speeds in comparison to inrunner motors. This characteristic has made outrunners particularly popular in applications requiring high torque, such as propelling drones, electric scooters, and small electric vehicles, as well as in various robotics and automation systems.
Overall, the outrunner is a brushless motor design that features an outer stator and an inner rotor. It is widely utilized for its compactness, high efficiency, excellent heat dissipation, and ability to generate high torque at low speeds.
The word "outrunner" is derived from the combination of the prefix "out-" and the noun "runner".
The prefix "out-" is derived from the Old English word "ūt", which means "outside" or "beyond". It is commonly used to indicate movement away from a particular place or position.
The noun "runner" comes from the Old English word "rinnan", meaning "to run". It refers to a person or thing that runs or moves swiftly.
When combined, "out-" and "runner" create the word "outrunner", which typically describes something or someone that is exceptionally fast or capable of outrunning others.