Answer / g senthilkumaran

Scalar drive means only V/F control over the motor
torque can control by V/F mode

Vector control drives use a mathematical model of the motor
to dynamically determine the values of the essential
operating and control parameters. They are called "vector
control" drives because this analysis is based on a vector
representation of current, voltage and magnetic flux.

Vector drives continuously monitor and analyze the motor
current to determine what voltage to apply at any given
frequency to produce the optimum magnetizing current.

Vector drives provide excellent performance in terms of
accurate static and dynamic speed regulation and rapid
response to sudden changes in load torque

When one of three series resistors is removed from a circuit and the circuit is reconnected, the current

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difference between turns ratio and transformation ratio?

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send me any model test paper of clerical post of state bank of india.......

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what is the diffrence between voltage and current?

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If we have 630kva step down transformer to operation 3 phase motor 150 kva which size of cable is used? at circuit breaker to 3 phase motor or to electrical board

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electricity board have asked me what size meter i need fitted in my garage, its a 415volt supply and i want to run six 20amp supplies tolifts and things plus ten florry lights , what kva meter do i need??

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what are the sample questions asking to the test cunducting for electrical superwising lisence test?

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After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

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want to know about DMRC

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Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA

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Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.

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For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

3 Answers  

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