How do you calculate the number of turns in a motor?
The number of turns in primary side is 500/10 = 50 . Number of turns in secondary side is 200/10 = 20. We can calculate the total turns ratio by calculating the voltage ratio ( primary side voltage / secondary side voltage = V1/V2). Now if you know voltage per turns then you can calculate the number of turns..
How do you calculate turns per phase?
First i used Hugh’s formula. (total area of magnet face in square inches) = 17000 x 13.4 / 200 / 0.6 / 17.53 = 108 turns per phase. If you have twelve coils total and thus 4 per phase then you should have 27 turns per coil.
How much winding does a 3 phase motor need?
The most basic 3-phase induction motor has three sets of windings, with each phase connected to a differ- ent set of windings, Figure 16-4. The current in each winding is 120 electrical degrees out of phase with the urrent in the other windings.
How do you calculate the starting current of a 3 phase motor?
An induction motor, starting “across the line”, will typically have an instantaneous draw 6x the kw it is rated to run at. e.g. a 10 hp motor is rated at 7.46 kw, so on starting it may draw 75 kw. On 480 volts 3 phase, the amperage will be I = W / (E x 1.73) = 75,000 / (480 x 1.73) = 90.4 amps.
How do you calculate the starting kVA of a motor?
- RkVA = RkW / Running motor PF (eq.
- To calculate starting kilovolt-amperes (SkVA) and starting kilowatts (SkW) for motors, use these equations: SkVA = (Nameplate hp) x (Locked rotor kVA/hp) (eq.
- SkW = (SkVA) x (Starting motor PF) (eq.
How do you find the no load current of a motor?
No load current for DC motor = 0.25 x Motor Full load current.
How do you find the full load current of a motor?
Look at the above formula, the three-phase full load current is equal to Power divided by the 3 times of product of line to neutral voltage and power factor. Here three-phase full load current is equal to the power divided by 1.732 times of line to line voltage and power factor.
What is the full load current of a motor?
A full load current is the largest current that a motor or other device is designed to carry under particular conditions.
What is the starting current of 1 hp motor?
For a 1 HP 3phase induction motor draws a current =W /V, so 1 HP is equal to 746 watts, or rounded off to 750 watts, so it will be 750 /415 volts =1.7 amperes, approximately and at a powerfactor at unity means 1.
Can I put salt on my windshield?
Saltwater de-icer spray for the car: Pour water into a spray bottle and add a scoop or two of salt. Since salt water has a lower freezing point than fresh water, it starts to melt the ice on contact.
How do I keep my car from frosting over night?
Each night before you go to bed, spray your windshield down with a vinegar solution that is three parts vinegar and one part water. This vinegar solution will help prevent frost and ice from forming on your windshield and if you are in a hurry in the morning, the same mixture will melt the ice.
How do I stop my car windows from frosting up while driving?
Many motorists recommend wiping rubbing alcohol on your windshield wipers and windshield after it has been fully cleared. Because of its chemical composition, this fluid is less likely to freeze, thus ensuring that you always have a clear view during your commute.
How do I stop my car from frosting up?
No car window covers? These things prevent frozen car windows:
- Mix your own car de-icer with vinegar, alcohol or salt, and apply it the evening before or in the morning.
- Use a make-shift car frost cover with a towel, piece of carpet, cardboard or even shower curtain.
- Park facing east.
- Cover side mirrors with a plastic bag.
Why is my car iced up inside?
If the temperature inside your car drops low enough any moisture in the air will condense on surfaces such as the glass and eventually begin to freeze. It could be as simple as a wet coat or pair of shoes left in the car overnight.
Will rubbing alcohol hurt car paint?
Isopropyl alcohol is NOT recommended for freshly painted finishes. You should never use isopropyl alcohol at full strength or it could permanently cause damage to your vehicle’s paint. Isopropyl alcohol, when diluted accordingly, can also be used to prep surfaces for paint, glass or wheel coatings.
Will Windex harm car paint?
Do not use Windex on car paint. Windex is much too harsh to use on the paint of your car, and it could cause some significant damage. You should be very careful about any cleaning materials or chemicals you use on your car.
Does white vinegar remove car paint?
Minerals will etch paint if water spots or cement stains stay on your car for more than a few days. Yes, using vinegar will remove the stains. But the paint may have etch spot (dimples) damage. The only way to fix this common problem is to polish the paint.
Can white vinegar remove paint?
Vinegar is an easy, inexpensive and effective way to remove dried, stuck-on paint from windows and other hard surfaces. Most importantly, vinegar is economical, environmentally friendly and removes stubborn paint with absolutely no dangerous chemicals or toxic fumes.