Voice Coil Motors
Voice Coil Motors - Related Videos
07:00
How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression
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The H1 deep transcranial magnetic stimulation coil is FDA-cleared for the treatment of depression. We demonstrate how to utilize the H1 for other conditions, such as auditory hallucinations and PTSD, by moving the helmet to different locations over the subject's skull.
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DC Motors
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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...
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11:18
AC Induction Motor Characterization
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. The objectives of this experiment are to find the equivalent circuit parameters of a three-phase induction motor using the per-phase equivalent circuit and tests similar to those used in transformer characterization. In electrical engineering, an equivalent circuit (or theoretical circuit) can be determined for a given system. The equivalent circuit retains all characteristics of the original system,...
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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
Changing the current changes the electromagnetic force acting on the coil. Increasing its magnitude changes the magnitude of motion, while reversing its direction reverses the resulting motion. This bidirectional response allows a system to make fine positional adjustments rather than relying on a fixed movement. It also links electrical control directly to the actuator’s mechanical output.
The permanent magnetic field provides the field in which the coil current produces Lorentz force. Because the coil sits within that field, electrical input produces movement without requiring a separate conversion stage. This direct relationship supports precise force control and helps explain why the actuator can respond rapidly when current is varied during a positioning task.
Low friction reduces mechanical resistance as the coil moves, while direct drive avoids an intervening mechanical transmission. Together, these features support fast response and controlled positioning. The practical benefit is not simply speed: reduced resistance can also make small changes in commanded motion or force easier to reproduce, which is important when a bioengineering system must handle measurements or manipulations consistently.
An application begins by placing the coil in the motor’s permanent magnetic field and connecting it to a source of electrical current. The system then varies current to set motion magnitude, or reverses current to change direction. This sequence can position a component, perform a manipulation, or support a measurement when the platform requires controlled linear movement.
In imaging systems, the actuator can provide fine positioning of components whose location affects an experiment or measurement. Its rapid response helps reposition those components efficiently, while accurate force control supports controlled adjustment. These characteristics make Voice Coil Motors relevant when imaging workflows require precise, repeatable motion within a bioengineering setup.
Robotic mechanisms and laboratory automation platforms use the same motion capabilities for different bioengineering tasks. Robotics can benefit from controlled movement during manipulation, whereas automation platforms can use precise positioning during repeated laboratory operations. In both settings, low friction, fast response, and force control can improve repeatability, helping biological experiments produce more consistent manipulation or measurement conditions.