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What are the problems of commutation in a DC generator?
1.resistance commutation 2.e.m.f commutation
What is a closed circuit?
A closed circuit is a kind of electric circuit in which the path that the electrons follow forms a complete circuit.
What is class A commutation of thyristor?
it is one of method to turn off scr. resonating LC component is used to turn off scr
What is advantage of digital relays?
They can be used as a kind of safety switch to allow a circuit with a small current through to switch on a circuit that will hve a larger current flowing through it.
Is ttl combinational circuit or sequential circuit?
it can be either, depending on parts used in the circuit and their connections.
What is mean by commutation switch?
A commutation switch is a device used to reverse the direction of current flow in a circuit, typically in motor control applications to control the direction of rotation. It allows for the smooth transition of current between different circuit elements, such as switching from one winding to another in a motor to maintain torque.
What are the difference between choppers and inverters?
chopper transforms ac to dc (dc chopper) while all inverter transform dc to ac commutation used in chopper: forced,load commutation used in inverter:forced(180 vsi),natural or line(120 vsi)
What does forced commutation mean?
The term "Forced commutation" is used when a thyristor is turned off using external components. If a thyristor is used in a DC circuit, when first turned on, it will stay on until the current goes to zero. To turn off the thyristor it is possible to use a Forced commutation circuit. The circuit creates a reverse voltage over the thyristor (and a small reverse current) for a short time, but long enough to turn off the thyristor. A simple circuit consist of a precharged capacitor and a switch (e.g. another thyristor) parallel to the thyristor. When the switch is closed, the current is supplied by the capacitor for a short while. This cause a reversed voltage over the thyristor, and the thyristor is turned off.
What are the problems of commutation in a DC generator?
1.resistance commutation 2.e.m.f commutation
What kind of math is used in circuitry?
Boolean algebra figures heavily in circuit design.
What is a closed circuit?
A closed circuit is a kind of electric circuit in which the path that the electrons follow forms a complete circuit.
What happens when a bulb of 6volts used in an circuit?
depending at the kind and high at the voltage, or/and the high of the power
What are the uses of the relay?
They can be used as a kind of safety switch to allow a circuit with a small current through to switch on a circuit that will hve a larger current flowing through it.
What kind of music is the recorder used in?
the recorder is commonly used in natural earthly sounding music
What is class A commutation of thyristor?
it is one of method to turn off scr. resonating LC component is used to turn off scr
What kind of current is produced by dry cells?
Simply, direct current (DC). The amount of current depends on the circuit it is used in.
Where was the French horn invented?
The French Horn was invented in 1753, it was invented because it was used for commutation and for the beautiful sound it made.
