592 views
Explain two-quadrant chopper.........

1 Answer

Answer :

Two quadrant chopper:

 There are two semiconductor controllable switches in the two-quadrant chopper.

Two quadrant type A chopper:

The figure shows the type A chopper. Both the switch never turn on at the same time because this will cause a short circuit. At the output, there is a freewheeling diode so the voltage is always positive. When the chopper 2 (or switch 2) is turned on then the voltage is zero and when chopper 1 is turn on then the output voltage Vo=Vs.

image

Two quadrant type B chopper:

The figure shows the two quadrant type B chopper. In this type of chopper, current is always positive. When both chopper 1 and chopper 2 are turned on then Vo=Vs. When chopper 1 and chopper 2 are off then Vo=-Vs.

Like 0 like

Please log in or register to answer this question.

Related questions

899 views

Description : A four -quadrant operation requires two full converters connected in  (1) Series (3) Back to back (2) Parallel (4) Series Cascade

Last Answer : A four-quadrant operation requires two full converters connected in Parallel 

1 answer
558 views

Description : A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would  (1) increase progressively  (2 ... 0.5 and then increase  (4) increase to a maximum value at α = 0.5 and then decrease

Last Answer : A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would increase to a maximum value at α = 0.5 and then decrease

1 answer
223 views

Last Answer : Yes, we can use triac in the multi-quadrant chopper.

1 answer
4.9k views

Description : In a thyristor D.C. chopper, which type of commutation results in best performance ?

Last Answer : voltage commutation

2 answers
227 views

Description : Four Quadrant Operation Of DC Motor

0 answers
681 views

Description : An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance

Last Answer : An FET is a better chopper than a BJT because it has lower offset voltage

1 answer
253 views

Description : Chopper controlled DC motor

Last Answer : Chopper controlled DC motor

1 answer
464 views

Description : Draw construction of SCR using two transistor model. Explain its operation.

Last Answer : Two Transistor Model of SCR or Thyristor

1 answer
0 views

Description : How can having two girlfriends at once go wrong, if they both know each other and know about each other and everything is in the open?

Last Answer : Wow, you really got back in the saddle quick. If it can go wrong, it will.

1 answer
210 views

Description : State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.  

Last Answer : Following advantages of MCB over Fuse: 1. No need of replacement of fuse wire. 2. Manually restore of supply is simple. 3. Fault understanding by visual inspection 4. More safe than fuse The standard specifications of ... 6A, 10A,16A,20A, 25A, 30A, 32A, 40A, 50A, 60A and 63A 6. 250V and 450 v

1 answer
110 views

Description : Application one lamp controlled from two places

Last Answer : Application one lamp controlled from two places: 1. For Stair case wiring 2. Hospital Wiring ( For operating the lamp in room and nursing station) 3. Bedroom Lighting. 

1 answer
326 views

Description : State two applications of : (i) PVC paper (ii) Porcelain with type of class based on withstand temperature is insulating material. 

Last Answer :  (i) Application of PVC paper : 1. It is used in slot lining or motor winding insulation purpose 2. For Insulation of Transformer winding (ii) Application of Porcelain : 1. Mainly used for manufacturing ... on withstand temperature : * H' & C' Class of insulation i e. 180° and above 180°C 

1 answer
300 views

Description : Illustrate with neat wiring diagram a single lamp control by two point method.

Last Answer : Single lamp control by two point method:  This system is commonly used for stair case wiring. It consists of two way switches (the switch operates always in one of the two possible positions) the ... the person will change the position of switch S2, so that the lamp will be switched OFF'.

1 answer
190 views

Description : State two types of Electronic dimmer.

Last Answer : Two types of electronic dimmers are: 1) S.C.R. operated dimmer 2) Triac operated dimmer 

1 answer
147 views

Description : Write two applications of D.C. series motor. 

Last Answer : The applications of D.C. series motor: 1. Cranes 2. Hoists 3. Trolley and cars 4. Conveyors 5. For traction work i.e. electric locomotives 6. Elevator 7. Air compressor

1 answer
170 views

Description : Mesh Analysis with two supermesh

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

2 answers
226 views

Description : Nodal Analysis with Voltage Sources dependent voltage source and two supernode

Last Answer : Nodal Analysis with Voltage Sources dependent voltage source and two supernode

1 answer
385 views

Description : Nodal analysis problem two current source

Last Answer : Nodal analysis problem two current source

1 answer
221 views

Description : List at least two examples that show how static electricity can be generated.

Last Answer : Examples of how static electricity can be generated include combing your hair, walking across a carpeted room, or sliding two pieces of plastic across each other.

1 answer
121 views

Description : Name two good conductors, two good insulators, and two semiconductors.

Last Answer : In general all metals are good conductors, with silver the best and copper second.

1 answer
159 views

Description : Merits of two wattmeter method

Last Answer : Advantages of Two Wattmeter Method for 3-Phase Power Measurement: 1) It is used for balanced as well as unbalanced load. 2) For the star type load, it is not necessary to ... reactive volt-amperes for balanced loads also. 7) The circuit connections are independent of load connection.

2 answers
90 views

Description : List two types of oscillator, which generates frequency in RF range.

Last Answer : Types of Oscillators generating frequencies in RF range: i) Hartley Oscillator ii) Colpitt’s Oscillator iii) Clapp Oscillator

1 answer
614 views

Description : Two port networks are connected in cascade. The parameters of the network are obtained by multiplying in individual

Last Answer : Two port networks are connected in cascade. The parameters of the network are obtained by multiplying in individual ABCD parameter matrix

1 answer
169 views

Last Answer : The two pressure coils of a single phase power factor meter have the same dimensions and the same number of turns.

1 answer
165 views

Last Answer : In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.

1 answer
81 views

Last Answer : In two part tariff, variation in load factor will affect operating or running charges.

1 answer
203 views

Last Answer : Due to no potential difference between the ends of the circiut there is no existance of current 

3 answers
9 views

Description : 4-Quadrent operation of chopper I is positive but V is may be positive are negative operates in which quadrant a) 1 and 2 b) 2 and 3 c) 1 and 3 d) 1 and 4

Last Answer : Ans: 1 and 4

1 answer
93 views

Description : The duty ratio of a step-up chopper with an output voltage of 200 V from a 80 V dc source, is (A) 0.4 (B) 0.5 (C ) 0.6 (D) 1.5 

0 answers
172 views

Description : The four-quadrant dual operation requires  (a) Two full converters in series  (b) Two full converters connected back to back  (c) Two full converters connected in parallel.  (d) Two semiconverters connected back to back

Last Answer : The four-quadrant dual operation requires Two full converters connected back to back 

1 answer
2 views

Description : What do you think about Price Chopper?

Last Answer : Never heard of it.

1 answer
1 view

Description : How can I become a better food chopper?

Last Answer : this is what i learned: make sure you hold the knife with your thumb on one side of the handle and the rest of your fingers on the other side - don't rest any fingers on the edge of the ... it - it gives you a lot more control over the knife, which will increase your speed, agility and efficiency

1 answer
2 views

Description : i have a chines made mini chopper bike and i cant find a websit that sells parts for it

Last Answer : Need Answer

1 answer
2 views

Description : I am looking for a good blender chopper that is dishwasher safe. Any suggestions?

Last Answer : One of the best dishwasher safe blender/chopper is the Kitchen Aid 5-Speed Metallic Blender. They are a little more expensive than the average blender but they last a long time and really take a beating.

1 answer
1 view

Description : Is there any benefit to using an onion chopper instead of a knife?

Last Answer : Yes, using an onion chopper instead of a knife will save you a lot of time. It might also save you a few tears!

1 answer
2 views

Description : How can I keep from crying when using an onion chopper?

Last Answer : To avoid crying while chopping an onion, you must first remove the bottom portion of the onion. This is where the roots come out and is the place that contains tear-inducing agents. You must remove it correctly or else you'll still cry.

1 answer
1 view

Description : Price Chopper Coupons?

Last Answer : In todayï ½s tough economy, saving money is more important than ever. Cut out unnecessary luxuries from your budget, go without, and change your spending habits. One new spending habit to adopt is ... for everyday items. Check out http://www2.pricechopper.com/coupons/ and start saving money today.

1 answer
6 views

Description : What are the disadvantages of load commutated chopper?

Last Answer : a. For high power applications, efficiency becomes very low because of high switching losses at high operating frequencies. b. Freewheeling diode is subjected to twice the supply voltage. c ... other pair is commutated. This can be realized by sensing the capacitor current that is alternating.

1 answer
10 views

Description : What are the advantages of load commutated chopper?

Last Answer : a. Commutating inductor is not required. b. It is capable of commutating any amount of load current. c. It can work at high frequencies in the order of kHz. d. Filtering requirements are minimal.

1 answer
8 views

Description : What are the advantages of current commutated chopper?

Last Answer : a. The capacitor always remains charged with the correct polarity. b. Commutation is reliable as load current is less than the peak commutation current ICP. c. The auxiliary thyristor TA is naturally commutated as its current passes through zero value.

1 answer
10 views

Description : What are the different types of chopper with respect to commutation process?

Last Answer : a. Voltage commutated chopper. b. Current commutated chopper. c. Load commutated chopper.

1 answer
8 views

Description : Write down the expression for the average output voltage for step down and step up chopper.

Last Answer : Average output voltage for step down chopper is VO= αVS. Average output voltage for step up chopper is VO= αVSx [1/ ( 1- α)].

1 answer
34 views

Description : What is meant by PWM control in dc chopper?

Last Answer : In this control method, the on time Ton is varied but chopping frequency is kept constant. The width of the pulse is varied and hence this type of control is known as PulseWidth Modulation (PWM).

1 answer
12 views

Description : What is meant by FM control in a dc chopper?

Last Answer : In frequency modulation control, the chopping frequency f (or the chopping period T) is varied. Here two controls are possible. a. On-time T onis kept constant b. Off period T offis kept constant.

1 answer
1 view

Description : Write down the expression for average output voltage for step up chopper.

Last Answer : Average output voltage for step down chopper V0= Vs, αis the duty cycle 1- α

1 answer
1 view

Description : Write down the expression for average output voltage for step down chopper.

Last Answer : Average output voltage for step down chopper V0 = αVs, αis the duty cycle

1 answer
3 views

Description : What is meant by step-up and step-down chopper?

Last Answer : In a step- down chopper or Buck converter, the average output voltage is less than the input voltage. In a step- up chopper or Boost converter, the average output voltage is more than the input voltage.

1 answer
2 views

Description : What are the applications of dc chopper?

Last Answer : Chopper provides a. High efficiency b. Smooth acceleration c. Fast dynamic response d. Regeneration

1 answer
4 views

Description : What are the applications of dc chopper?

Last Answer : a. Battery operated vehicles b. Traction motor control in electric traction c. Trolly cars d. Marine hoists e. Mine haulers f. Electric braking.

1 answer
5 views

Description : What is meant by dc chopper?

Last Answer : A dc chopper is a high speed static switch used to obtain variable dc voltage from a constant dc voltage.

1 answer
...