What are the applications of dc chopper?

What are the applications of dc chopper?
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1 Answer

Answer :

Chopper provides
a.  High efficiency
b.  Smooth acceleration
c.  Fast dynamic response
d.  Regeneration
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Related questions

What are the applications of dc chopper?

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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.

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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).

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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.

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

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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.

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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.

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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.

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

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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

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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

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