What will happen if 230V DC motor connected to 230V AC
Supply?
Answer Posted / rvg
These are the effets produced when a DC motor connected
with AC supply:
1.Rotor speed will be less than the rated speed.
2. Rotor produced less torque and max. will be very less.
3.Core and copper loss will be more.
4.high sparking at brush, there by reduced life.
5.Motor gets heated up easily.
| Is This Answer Correct ? | 159 Yes | 14 No |
Post New Answer View All Answers
What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?
1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.
What is the meaning of HT Trivector Meter ?
What is force on a conductor in a magnetic field ?
why zero sequence impedance measurement is not applicable for single phase GT
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
What will happen to the protection and metering, if the polarity of a single or two PT/PTs in three phase system is reversed? Please provide reference if any.
Briefly define and explain the following different types of Pulse Amplitude Modulation (PAM) with some examples. i) 2-PAM ii) 4-PAM iii) 8-PAM iv) 16-PAM v) Quadrature Amplitude Modulation (QAM)
where can the transformer having vector group Yny0 be used??
Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?
why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.
What is the formula for calculating impedance of transformers connected parallel at fault level 50KA?
What is the formula to calculate the rating of a three phase air circuit breaker
11kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?
71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit