Electric Motors
Electric Motors - Related Videos
06:28
Transcranial Electrical Stimulation of the Motor Cortex in an Awake Rat
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2025
Source: Fritsch, B. et al. Transcranial Electrical Brain Stimulation in Alert Rodents. J. Vis. Exp. (2017)This video demonstrates the implantation of electrodes and the application of transcranial electrical stimulation (tES) to the motor cortex of alert rats. It outlines the steps involved in electrode placement, stimulation delivery, and the resulting neuronal and microglial activation, highlighting its neurotherapeutic potential.
07:47
Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function
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Cited by 4 •
2016
Non-invasive electrical brain stimulation can modulate cortical function and behavior, both for research and clinical purposes. This protocol describes different brain stimulation approaches for modulation of the human motor system.
03:49
Non-Invasive Electrical Brain Stimulation for Modulating Human Motor Neuron Activity
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2025
Source: Curado, M. et. al., Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function. J. Vis. Exp. (2016)This video demonstrates the setup and mechanism of transcranial direct current stimulation (tDCS) for modulating human motor function. By placing the anode over the primary motor cortex and the cathode over the contralateral supraorbital area, the targeted electrical stimulation increases cortical excitability, enhancing motor neuron activity and improving...
09:29
DC Motors
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. The DC machine operates with DC currents and voltages as opposed to an AC machine, which requires AC currents and voltages. DC machines were the first to be invented and utilize two magnetic fields that are controlled by DC currents. The same machine can be easily reconfigured to be a motor or generator if appropriate field excitation is available, since the DC machine has two fields termed field...
11:03
Motor Maps
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California One principle of brain organization is the topographic mapping of information. Especially in sensory and motor cortices, adjacent regions of the brain tend to represent information from adjacent parts of the body, resulting in maps of the body expressed on the surface of the brain. The primary sensory and motor maps in the brain surround a prominent sulcus known as the central sulcus. The cortex...
FAQs
The key mechanical effect is torque generated by magnetic force on current-carrying conductors. When those conductors interact with a magnetic field, the force acts on the rotor and produces rotational motion rather than merely translating the conductor. This relationship gives electric motors their operating principle and provides a direct physics example of how electromagnetism can drive mechanical work.
Rotation can continue only when the motor keeps the force pattern oriented to produce torque. In many designs, a commutator performs this switching function, while other designs use an electronic controller. These components help sustain rotation as the rotor moves, so the motor can deliver continuous mechanical motion instead of a single magnetic deflection.
DC, induction, and synchronous motors should be distinguished by how their configurations govern performance. The overview identifies speed, torque, and efficiency as the key outcomes that differ among these designs, rather than treating all motors as interchangeable. This comparison helps explain why motor selection depends on the behavior required by a machine or transportation system.
Energy conservation provides a way to interpret what happens inside an electric motor: electrical energy enters the system and mechanical motion emerges from the interaction of current and magnetic fields. In physics, this connection matters because it links the motor's electromagnetic mechanism to its practical output, helping explain why motors are central examples of applied electromagnetism.
Electric motors appear wherever systems require electrically driven motion. The overview places them in household appliances, industrial equipment, transportation, and automation. Their role is not limited to one scale: the same broad physical principle supports machine operation, vehicle propulsion, and automated movement, while motor configuration determines how speed, torque, and efficiency are managed in each setting.
In electric vehicles, the important context is conversion from electrical input to useful mechanical motion for transportation. Motor performance can therefore be discussed through speed, torque, and efficiency, the same variables that distinguish motor configurations. This makes electric vehicles a clear application of electromagnetism and energy conservation beyond stationary household or industrial machinery.
Precision robotics illustrates why motor behavior matters in automation. Robotic systems require controlled mechanical movement, so the relevant motor design must be considered in relation to speed, torque, and efficiency. The overview also connects motors with precision robotics, showing how a physics principle becomes a component of systems that perform repeatable, carefully directed motion.