Average Back Emf with Negligible Commutation Overlap Calculator

✖Ac line voltage is the amount of voltage which a power line delivers to its destination, or the point where it is being consumed.ⓘ AC Line Voltage [E_L]			+10% -10%
✖Firing angle α. It is defined as angle measured from the instant that gives. maximum output voltage to the one at which it is actually triggered.ⓘ Firing Angle [θ]			+10% -10%

✖Back emf the back emf is calculated based on the difference between the supplied voltage and the loss from the current through the resistance.ⓘ Average Back Emf with Negligible Commutation Overlap [E_b]

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Average Back Emf with Negligible Commutation Overlap

Formula

`"E"_{"b"} = 1.35*"E"_{"L"}*cos("θ")`

Example

`"145.6046V"=1.35*"120V"*cos("26°")`

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Average Back Emf with Negligible Commutation Overlap Solution

STEP 0: Pre-Calculation Summary

Formula Used

Back Emf = 1.35*AC Line Voltage*cos(Firing Angle)
E_b = 1.35*E_L*cos(θ)
This formula uses 1 Functions, 3 Variables

Functions Used

cos - Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle., cos(Angle)

Variables Used

Back Emf - (Measured in Volt) - Back emf the back emf is calculated based on the difference between the supplied voltage and the loss from the current through the resistance.
AC Line Voltage - (Measured in Volt) - Ac line voltage is the amount of voltage which a power line delivers to its destination, or the point where it is being consumed.
Firing Angle - (Measured in Radian) - Firing angle α. It is defined as angle measured from the instant that gives. maximum output voltage to the one at which it is actually triggered.

STEP 1: Convert Input(s) to Base Unit

AC Line Voltage: 120 Volt --> 120 Volt No Conversion Required
Firing Angle: 26 Degree --> 0.45378560551844 Radian (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

E_b = 1.35*E_L*cos(θ) --> 1.35*120*cos(0.45378560551844)

Evaluating ... ...

E_b = 145.604635500471

STEP 3: Convert Result to Output's Unit

145.604635500471 Volt --> No Conversion Required

FINAL ANSWER

145.604635500471 ≈ 145.6046 Volt <-- Back Emf

(Calculation completed in 00.020 seconds)

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Home » Engineering » Electrical » Utilization of Electrical Energy » Electric Traction » Electric Drives » Average Back Emf with Negligible Commutation Overlap

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Created by Aman Dhussawat

GURU TEGH BAHADUR INSTITUTE OF TECHNOLOGY (GTBIT), NEW DELHI

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Go Slip = (Back Emf/RMS Value of Rotor Side Line Voltage)*modulus(cos(Firing Angle))

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Average Back Emf with Negligible Commutation Overlap

Go Back Emf = 1.35*AC Line Voltage*cos(Firing Angle)

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Average Back Emf with Negligible Commutation Overlap Formula

Back Emf = 1.35*AC Line Voltage*cos(Firing Angle)
E_b = 1.35*E_L*cos(θ)

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The principal disadvantage of the sub synchronous cascade drive is its low power factor particularly at reduced speeds. The reactive power consumption of the inverter is largely responsible for the low power factor of the cascade drive.

How to Calculate Average Back Emf with Negligible Commutation Overlap?

Average Back Emf with Negligible Commutation Overlap calculator uses Back Emf = 1.35*AC Line Voltage*cos(Firing Angle) to calculate the Back Emf, The Average Back emf with negligible commutation overlap formula is defined as for a line commutated three phase bridge inverter with negligible commutation overlap the average back e.m.f . Back Emf is denoted by E_b symbol.

How to calculate Average Back Emf with Negligible Commutation Overlap using this online calculator? To use this online calculator for Average Back Emf with Negligible Commutation Overlap, enter AC Line Voltage (E_L) & Firing Angle (θ) and hit the calculate button. Here is how the Average Back Emf with Negligible Commutation Overlap calculation can be explained with given input values -> 145.6046 = 1.35*120*cos(0.45378560551844).

FAQ

What is Average Back Emf with Negligible Commutation Overlap?

The Average Back emf with negligible commutation overlap formula is defined as for a line commutated three phase bridge inverter with negligible commutation overlap the average back e.m.f and is represented as E_b = 1.35*E_L*cos(θ) or Back Emf = 1.35*AC Line Voltage*cos(Firing Angle). Ac line voltage is the amount of voltage which a power line delivers to its destination, or the point where it is being consumed & Firing angle α. It is defined as angle measured from the instant that gives. maximum output voltage to the one at which it is actually triggered.

How to calculate Average Back Emf with Negligible Commutation Overlap?

The Average Back emf with negligible commutation overlap formula is defined as for a line commutated three phase bridge inverter with negligible commutation overlap the average back e.m.f is calculated using Back Emf = 1.35*AC Line Voltage*cos(Firing Angle). To calculate Average Back Emf with Negligible Commutation Overlap, you need AC Line Voltage (E_L) & Firing Angle (θ). With our tool, you need to enter the respective value for AC Line Voltage & Firing Angle and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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