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  • Ward Leonard control — Ward Leonard Control, also known as the Ward Leonard Drive System, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S Navy and also… …   Wikipedia

  • Harry Ward Leonard — Infobox Scientist name = Harry Ward Leonard box width = image width = 229px caption = Harry Ward Leonard birth date = February 8, 1861 birth place = Cincinnati, Ohio, U.S.A death date = February 18, 1915 death place = New York, U.S.A residence =… …   Wikipedia

  • Harry Ward Leonard — (* 8. Februar 1861 in Cincinnati, Ohio; † 18. Februar 1915 in New York) war ein US amerikanischer Elektroingenieur und Erfinder. Seine 30 jährige Karriere spannte sich vom späten 19. bis in das frühe 20. Jahrhundert. Er wurde mit seiner …   Deutsch Wikipedia

  • Leonard Braithwaite — Leonard Austin Braithwaite (born October 23, 1923) is a lawyer and politician in Ontario, Canada. He served in the Legislative Assembly of Ontario from 1963 to 1975, as a member of the Liberal Party. He was the first Black Canadian to be elected… …   Wikipedia

  • Ward Churchill — Infobox Celebrity name = Ward Churchill imagesize = 200px caption = Ward Churchill speaking at the Bay Area Anarchist Book Fair, May 2005. birth date = birth date and age|mf=yes|1947|10|2 birth place = Elmwood, Illinois, United States death date …   Wikipedia

  • WARD, Frederick William (1847-1934) — journalist was born in New Zealand on 5 April 1847. He was the fourth son of the Rev. Robert Ward, a Primitive Methodist clergyman, and was educated for the same ministry. He came to Australia in his early twenties and was associated with the Rev …   Dictionary of Australian Biography

  • Direct torque control — (DTC) is one method used in variable frequency drives to control the torque (and thus finally the speed) of three phase AC electric motors. This involves calculating an estimate of the motor s magnetic flux and torque based on the measured… …   Wikipedia

  • Harry W. Leonard — Harry Ward Leonard (* 8. Februar 1861 in Cincinnati; † 18. Februar 1915 in New York) war ein US amerikanischer Elektroingenieur und Erfinder. Seine 30 jährige Karriere spannte sich vom späten 19. bis in das frühe 20. Jahrhundert. Er wurde mit… …   Deutsch Wikipedia

  • Brushed DC electric motor — A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Contents 1 Simple two pole DC motor 2 The commutating plane 2.1 Compensation for stator field distortion …   Wikipedia

  • Booster (electric power) — A Booster was a motor generator (MG) set used for voltage regulation in direct current (DC) electrical power circuits. The development of alternating current and solid state devices has rendered it obsolete. Boosters were made in various… …   Wikipedia

  • Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …   Wikipedia