Brushes Connection
Brushes Connection - Related Videos
13:57
Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
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Cited by 4 •
2014
The methodology to perform friction force microscopy experiments for contacting brushes is presented: Two polymer brushes that are grafted from (a) substrates and (b) colloidal probes are slid to show that, by using two contacting immiscible brush systems, friction in sliding contacts is reduced compared to miscible brush systems.
06:56
Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
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Cited by 17 •
2013
Poly(ethylene glycol) (PEG) brush-arm star polymers (BASPs) with narrow mass distributions and tunable nanoscopic sizes are synthesized in via ring opening metathesis polymerization (ROMP) of a PEG-norbornene macromonomer followed by transfer of portions of the resulting living brush initiator to vials containing varied amounts of a rigid, photo-cleavable bis-norbornene crosslinker.
01:23
Dietary Connections
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2019
In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used as energy sources to produce...
10:25
Isolation and Quantitative Evaluation of Brush Cells from Mouse Tracheas
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Cited by 9 •
2019
Brush cells are rare cholinergic chemosensory epithelial cells found in the naïve mouse trachea. Due to their limited numbers, ex vivo evaluation of their functional role in airway immunity and remodeling is challenging. We describe a method for isolation of tracheal brush cells by flow cytometry.
01:11
Introduction to Connective Tissues
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2023
Connective tissues are one of the four main tissue types in humans that are extensively present in the body. They are characterized by cells embedded in an extracellular matrix (ECM) composed of a ground substance and three main types of protein fibers— collagen, elastic, and reticular fibers. The ground substance of connective tissues can range from a watery and jelly-like consistency to mineralized and hard. The wide variety of cells in the connective tissues include fibroblasts, osteocytes,...
FAQs
In a commutator machine, the brush connection works with segmented conductive surfaces so the current direction in selected rotor coils is reversed as rotation proceeds. This switching keeps the electromagnetic action aligned with continuous torque in a motor or supports the intended induced output in a generator. The timing and quality of that connection therefore influence machine operation.
With slip rings, the brushes maintain electrical contact with rotating conductive surfaces without the current-reversal function described for a commutator. The connection primarily provides a continuous path for current to enter or leave rotating windings. A commutator arrangement adds selective reversal in coils, making the two contact systems relevant to different electrical behaviors in rotating machines.
The contact arrangement determines how current is distributed through the sliding interface and rotating windings. Changes in that arrangement can influence voltage output, efficiency, wear, and sparking, all of which affect reliability. Studying these effects helps connect an apparently small contact region with the broader electrical and mechanical performance of the machine.
A rotating machine must transfer electrical energy between stationary and moving parts while the rotor changes position continuously. Brushes connection provides the physical and electrical link for that transfer, so its behavior illustrates how motion, current flow, and induced electrical output interact. This makes the arrangement useful for analyzing electromechanical energy conversion rather than treating the rotor and external circuit separately.
Analysis should consider current distribution, voltage output, efficiency, brush and contact wear, sparking, and overall reliability. These outcomes describe both electrical performance and the durability of the moving interface. Comparing them across a machine's operating arrangement helps determine whether the connection supports dependable transfer of energy to or from the rotating windings.
In a motor, analysis focuses on how the connection and any commutator switching support continuous torque. In a generator, attention centers on how the rotating windings deliver induced output through the contact system. Examining both cases shows how the same stationary-to-rotating interface serves opposite directions of electromechanical energy transfer.
A problematic arrangement may be associated with uneven current distribution, reduced voltage output, lower efficiency, increased wear, sparking, or reduced reliability. These effects provide observable indicators that the moving electrical interface is not performing well. For physics and electrical engineering studies, they help relate contact behavior to the machine's overall operating condition.
The connection operates at the boundary between stationary contacts and rotating conductive surfaces, where electrical transfer must continue during motion. Because its design affects wear, sparking, current distribution, efficiency, and output, it can influence whether the machine performs consistently over time. Evaluating this interface is therefore important when interpreting the reliability of motors, generators, and related systems.