Variable Speed Motor
Variable Speed Motor - Related Videos
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...
06:17
A Task for Assessing the Impact of a Partner on the Speed and Accuracy of Motor Performance in Rats
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Cited by 2 •
2019
A procedure to measure the speed and accuracy of rats’ motor performance in a social condition is described. The protocol enables us to investigate the effect of the mere presence of others on speed and accuracy of motor performance in one experiment.
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...
08:34
Visualization of High Speed Liquid Jet Impaction on a Moving Surface
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Cited by 4 •
2015
Two experimental devices for examining liquid jet impingement on a high-speed moving surface are described: an air cannon device and a spinning disk device. The apparatuses are used to determine optimal approaches to the application of liquid friction modifier (LFM) onto rail tracks for top-of-rail friction control.
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,...
FAQs
Electronic controllers adjust the motor’s voltage, current, or supply frequency to change rotational behavior. These control signals let equipment operate at a speed suited to the task rather than relying on a single setting. In genetics laboratories, that flexibility supports controlled centrifugation, mixing, shaking, and pumping while helping align mechanical operation with sample-handling requirements.
Speed sensors provide feedback about the motor’s operation, allowing the control system to maintain a stable speed when the load changes. This matters because laboratory equipment may experience different resistance as samples, liquids, or materials move. Feedback-based regulation can therefore improve consistency across repeated runs and reduce unintended variation in sample-processing conditions.
The selected speed affects how strongly samples and reagents are mechanically handled. Precise control can help protect biological samples from excessive shear, meaning damaging mechanical stress caused by movement, while still providing the agitation or circulation a procedure requires. This balance is relevant to reproducible workflows involving DNA, RNA, and cellular analysis.
The researcher first identifies the equipment task, such as centrifuging, shaking, mixing, or pumping, and then selects an appropriate operating speed. An electronic controller supplies the required adjustment through voltage, current, or frequency changes. When available, feedback from a speed sensor helps maintain the selected operation as the load changes during the experiment.
Centrifuges, orbital shakers, mixers, and pumps are examples of genetics laboratory equipment that can be driven by variable speed motors. Each device applies controlled motion differently: separation, orbital agitation, mixing, or fluid movement. Matching motor speed to the device’s task helps researchers manage sample handling, cell growth conditions, and reagent distribution.
In genetics workflows, adjustable motor operation contributes to consistent physical conditions during sample processing. Controlled centrifugation can support handling steps, while regulated shaking, mixing, or pumping can influence cell growth conditions and reagent distribution. By limiting unnecessary variation and avoiding excessive shear, the approach can improve workflow reproducibility across DNA, RNA, and cellular analyses.