rotatory - определение. Что такое rotatory
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Что (кто) такое rotatory - определение

AN EXAMPLE OF THE APPLICATION OF LENZ'S LAW
Eddy Current; Eddy currents; Eddy-current; Foucault current; Foucault Current; Magnetic eddy currents; Eddy-currents; Eddy Currents; Rotatory magnetism; Magnetism by rotation; Induction current; Induction currents
  • Demonstration of Waltenhofen's pendulum, precursor of eddy current brakes. The formation and suppression of eddy currents is here demonstrated by means of this pendulum, a metal plate oscillating between the pole pieces of a strong electromagnet. As soon as a sufficiently strong magnetic field has been switched on, the pendulum is stopped on entering the field.
  • Lamination of magnetic cores in transformers greatly improves the efficiency by minimising eddy currents
  • E-I transformer laminations showing flux paths.  The effect of the gap where the laminations are butted together can be mitigated by alternating pairs of E laminations with pairs of I laminations, providing a path for the magnetic flux around the gap.
  • Eddy current brake. The North magnetic pole piece ''(top)'' in this drawing is shown further away from the disk than the South; this is just to leave room to show the currents. In an actual eddy current brake the pole pieces are positioned as close to the disk as possible.
  • '''B'''}}, green</span>)'' with insulation ''(C)'' between them reduces the eddy currents. Although the field and currents are shown in one direction, they actually reverse direction with the alternating current in the transformer winding.
  • A cross section through a linear motor placed above a thick aluminium slab. As the [[linear induction motor]]'s field pattern sweeps to the left, eddy currents are left behind in the metal and this causes the field lines to lean.

Rotatory      
·adj Turning as on an axis; rotary.
II. Rotatory ·noun A Rotifer.
III. Rotatory ·adj Going in a circle; following in rotation or succession; as, rotatory assembles.
IV. Rotatory ·adj Producing rotation of the plane of polarization; as, the rotatory power of bodies on light. ·see the Note under polarization.
rotatory      
a.
Whirling, rotating, rotary.
Specific rotation         
  • polarizing filter]] '''(7)'''.
OPTICAL PROPERTY OF CHIRAL CHEMICAL COMPOUNDS
In chemistry, specific rotation ([α]) is a property of a chiral chemical compound. It is defined as the change in orientation of monochromatic plane-polarized light, per unit distance–concentration product, as the light passes through a sample of a compound in solution.

Википедия

Eddy current

In electromagnetism, eddy currents (also called Foucault's currents) are loops of electric current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction or by the relative motion of a conductor in a magnetic field. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor. The magnitude of the current in a given loop is proportional to the strength of the magnetic field, the area of the loop, and the rate of change of flux, and inversely proportional to the resistivity of the material. When graphed, these circular currents within a piece of metal look vaguely like eddies or whirlpools in a liquid.

By Lenz's law, an eddy current creates a magnetic field that opposes the change in the magnetic field that created it, and thus eddy currents react back on the source of the magnetic field. For example, a nearby conductive surface will exert a drag force on a moving magnet that opposes its motion, due to eddy currents induced in the surface by the moving magnetic field. This effect is employed in eddy current brakes which are used to stop rotating power tools quickly when they are turned off. The current flowing through the resistance of the conductor also dissipates energy as heat in the material. Thus eddy currents are a cause of energy loss in alternating current (AC) inductors, transformers, electric motors and generators, and other AC machinery, requiring special construction such as laminated magnetic cores or ferrite cores to minimize them. Eddy currents are also used to heat objects in induction heating furnaces and equipment, and to detect cracks and flaws in metal parts using eddy-current testing instruments.

Примеры употребления для rotatory
1. "I traversed several currents of opposite directions, which occasioned an almost continual rotatory movement of the balloon.
2. These Transitional Arrangements will involve the establishment of two systems of government: one in the North and another in the South, with a rotatory presidency.