Ward-Leonard control is basically a?

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Ward-Leonard control is basically a?

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asked Mar 20, 2018 by anonymous

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The chief advantage of Ward-Leonard system D.C. motor speed control is that is

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Last Answer : The chief advantage of Ward-Leonard system D.C. motor speed control is that is Gives smooth, sensitive and wide speed control

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For constant torque drive which speed control method is preferred ?

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is an open loop control system. (a) Ward Leonard control (b) Field controlled D.C. motor (c) Stroboscope (d) Metadyne

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The method of D.C. motor speed control shown in the illustration is known as _____________. EL-0101 A. Ward-Leonard B. Sperry-Rand C. Atlas-Copco D. Burmeister-Wain

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asked Jan 4 by itszee

The basic type of D.C. motor speed control where a generator armature directly feeds the motor armature and the motor and generator fields are excited by a separate D.C. source is called ___________________. A. Burmeister-Wain B. Ward-Leonard C. Sperry-Rand D. Atlas-Copco

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Last Answer : Answer: B

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asked May 1, 2018 by anonymous

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asked Apr 28, 2018 by anonymous

A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the

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Last Answer : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system crosses the real axis at -0.1.

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asked Apr 28, 2018 by anonymous

Precise control of reactive current flow entering the transmission and distribution systems can be minimized

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asked Apr 28, 2018 by anonymous

Regulating-transformers are used in power systems for control of

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asked Apr 26, 2018 by anonymous

Negative feedback in a closed-loop control system DOES NOT

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229 views 1 answer

asked Apr 26, 2018 by anonymous

The standard for long distance analog signal transmission in process control industry is

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Last Answer : The standard for long distance analog signal transmission in process control industry is 4-20 mA

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asked Apr 26, 2018 by anonymous

Which motor has the poorest speed control?

Last Answer : Series motor has the poorest speed control.

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asked Mar 20, 2018 by anonymous

The armature voltage control of D.C. motor provides?

Last Answer : The armature voltage control of D.C. motor provides constant torque drive.

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Usually wide and sensitive speed control is desired in case of?

Last Answer : Usually wide and sensitive speed control is desired in case of colliery winders.

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Speed control of a universal motor is achieved by?

Last Answer : Speed control of a universal motor is achieved by varying field flux with tapped field windings, connecting rheostat in series, applying variable voltage by means of silicon controlled rectifier, applying variable voltage by means of variable auto-transformer.

100 views 1 answer

asked Mar 20, 2018 by anonymous