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RPM (ISSN 0315-5994 and later ISSN 0033-7064) was a Canadian music-industry publication that featured song and album charts for Canada. The publication was founded by Walt Grealis in February 1964, supported through its existence by record label owner Stan Klees .
Ignition system of a flat-twin Citroën 2CV. A wasted spark system is a type of ignition system used in some four-stroke cycle internal combustion engines.In a wasted spark system, the spark plugs fire in pairs, with one plug in a cylinder on its compression stroke and the other plug in a cylinder on its exhaust stroke.
An ignition coil is used in the ignition system of a spark-ignition engine to transform the battery voltage to the much higher voltages required to operate the spark plug(s). The spark plugs then use this burst of high-voltage electricity to ignite the air-fuel mixture. The ignition coil is constructed of two sets of coils wound around an iron ...
On October 25, 1999, the chart made a slight change to the name Top 30 Rock Report. [4] The chart kept this name until it was published for the last time on November 6, 2000, due to the ceasing of the RPM magazine's publication. [5] The charts published by RPM are archived by Library and Archives Canada.
The electrical insulation system for wires used in generators, electric motors, transformers, and other wire-wound electrical components is divided into different classes by temperature and temperature rise.
In electrical engineering, coil winding is the manufacture of electromagnetic coils. Coils are used as components of circuits, and to provide the magnetic field of motors, transformers, and generators, and in the manufacture of loudspeakers and microphones. The shape and dimensions of a winding are designed to fulfill the particular purpose.
The platters in contemporary HDDs are spun at speeds varying from 4200 rpm in energy-efficient portable devices, to 15,000 rpm for high-performance servers. [52] The first HDDs spun at 1,200 rpm [5] and, for many years, 3,600 rpm was the norm. [53] As of November 2019, the platters in most consumer-grade HDDs spin at 5,400 or 7,200 rpm.
A Rogowski coil is a toroid of wire used to measure an alternating current I(t) through a cable encircled by the toroid. The picture shows a Rogowski coil encircling a current-carrying cable. The output of the coil, v(t), is connected to a lossy integrator circuit to obtain a voltage V out (t) that is proportional to I(t).