BEMF current reversal.

[Allen Burgess]

Reluctance and Reactance.

"Magnetic reluctance, or magnetic resistance, is a concept used in the analysis of magnetic circuits. It is analogous to resistance in an electrical circuit, but rather than dissipating electric energy it stores magnetic energy. In likeness to the way an electric field causes an electric current to follow the path of least resistance, a magnetic field causes magnetic flux to follow the path of least magnetic reluctance. It is a scalar, extensive quantity, akin to electrical resistance. The unit for magnetic reluctance is inverse henry, H−1".

"In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance. The notion of reactance is similar to electrical resistance, but it differs in several respects. In phasor analysis, reactance is used to compute amplitude and phase changes of sinusoidal alternating current going through a circuit element. It is denoted by the symbol X {\displaystyle \scriptstyle {X}} \scriptstyle {X}. An ideal resistor has zero reactance, whereas ideal inductors and capacitors have zero resistance – that is, respond to current only by reactance. The magnitude of the reactance of an inductor rises in proportion to a rise in frequency, while the magnitude of the reactance of a capacitor decreases in proportion to a rise in frequency. As frequency goes up, inductive reactance goes up and capacitive reactance goes down".


Remember our H and B field: The H field involves electrical terms and reactance is similar to electrical resistance, that leaves the B field, magnetic resistance or reluctance.

Magnetic reluctance is directly proportional to the maqnetic field strength in the inductor. This is measured in inverse Henries as Teslas or x 10000 as units of Gauss.

The magnitude of "Electrical Reactance" rises in direct proportion to the frequency in an inductor, and drops in inverse proportion to the increased frequency in a capacitor.

"As frequency goes up, inductive reactance goes up and capacitive reactance goes down".

Reluctance rises in direct proportion to the magnetic field of the inductor. Just like Resistance does when Ohmic resistance is added to the circuit..

[bistander]

One of those re...ance words

@bistander,

Very funny!

1-H=1T

-.04 microhenry = -4 x 10-8 henry.

One Tesla=10,000 Gauss

400,000,000 divided into 10,000

Answer: .000025 Gauss. That's the strength of the magnetic field in the inductor, and the amount of reluctance in the inductor, which is the equivalent of Ohmic resistance only to a changing current.

Everyone knows an inductor acts as a conductor to a straight D.C. current, that's why we find the reluctance formula used more frequently with A.C. current.

we find the reluctance formula used more frequently with A.C. current.

Maybe you have reluctance confused with reactance.

[Allen Burgess]

Ridicule

That is ridiculous.

@bistander,

You can shoot your "Inductance Meter".

[bistander]

1-H=1T

That is ridiculous.

[Allen Burgess]

Q: What's that value indicate?

A: Cheap meter.

@bistander,

Very funny!

1-H=1T

-.04 microhenry = -4 x 10-8 henry.

One Tesla=10,000 Gauss

400,000,000 divided into 10,000

Answer: .000025 Gauss. That's the strength of the magnetic field in the inductor, and the amount of reluctance in the inductor, which is the equivalent of Ohmic resistance only to a changing current.

Everyone knows an inductor acts as a conductor to a straight D.C. current, that's why we find the reluctance formula used more frequently with A.C. current.

[bistander]

@bistander,

Those are merely aggregate units that are empty of any value. Look at the reluctance schematic. You'll find two inductors where the resistors appear in the adjacent diagram. Let's say we place our two inductance meter electrodes across each wire of one inductor and measure ".04 Negative Micro-Henries". Negative, because the minus sign shows up in the readout window of the inductance meter. What's that value indicate?

Q: What's that value indicate?

A: Cheap meter.

[Allen Burgess]

Seconds squared Amperes squared over kilograms meters squared.

or

Amperes /(Volts * seconds)

@bistander,

Those are merely aggregate units that are empty of any value. Look at the reluctance schematic. You'll find two inductors where the resistors appear in the adjacent diagram. Let's say we place our two inductance meter electrodes across each wire of one inductor and measure ".04 Negative Micro-Henries". Negative, because the minus sign shows up in the readout window of the inductance meter. What's that value indicate?

[bistander]

Easy one

@bistander,

O.K. tell me now: What's your "Inverse Henry" equal to?

Seconds squared Amperes squared over kilograms meters squared.

or

Amperes /(Volts * seconds)

[Allen Burgess]

@bistander,



So we see above that one Ohm is equal to (V/A).

Now what's your "Inverse Henry" equal to?

Reluctance is to (-H) as Resistance is to Ohms. You're all kinds of confused by this (-H) factor right?

"A negative correlation means that there is an inverse relationship between two variables".

[Allen Burgess]

That is not "Negative Henry". It is inverse henry.

That is a fundamental difference.

Also, you continue to confuse the variables (symbols representing the physical quantities) with the units (used to define the measurement system).

@bistander,

O.K. tell me now: What's your "Inverse Henry" equal to?

"A negative correlation means that there is an inverse relationship between two variables".

[bistander]

Inverse vs negative

We see the "Negative Henry" value on the bottom left, and the customary resistance formula on the right. The "Reluctance" is directly proportional the intensity of the magnetic field on the left, just like the "Resistance" in the formula on the right is directly proportional to the Ohmic resistance.

Everyone knows that the presence of a magnetic field in an inductor opposes change to an electrical current. These formulas are very simple to understand once the "Cuttlefish" ink's washed away.


One "Negative Henry" equals one "Tesla" of magnetic force.

That is not "Negative Henry". It is inverse henry.

That is a fundamental difference.

Also, you continue to confuse the variables (symbols representing the physical quantities) with the units (used to define the measurement system).

[Allen Burgess]

"Magnetic Reluctance Formula".

We see the "Negative Henry" value on the bottom left, and the customary resistance formula on the right. The "Reluctance" is directly proportional the intensity of the magnetic field on the left, just like the "Resistance" in the formula on the right is directly proportional to the Ohmic resistance.

Everyone knows that the presence of a magnetic field in an inductor opposes change to an electrical current. These formulas are very simple to understand once the "Cuttlefish" ink's washed away.


One "Negative Henry" equals one "Tesla" of magnetic force.

[Allen Burgess]

Lenz's Law.

Lenz's Law

"When a bar magnet is pushed into a coil connected to an ammeter the meter deflects. Pulled out of the coil the meter deflects in the opposite direction".

Good video on "Magnetic Reluctance":

https://www.coursera.org/learn/electronic-converters/lecture/8MPtI/reluctance-and-magnetic-circuits

[Allen Burgess]

Slip knot loop hole.

TK lynches himself again by yet another one of his notorious "Slip knot Loopholes".

Tinselkoala , Milehigh , Citfa and a pack of running Jackals over on the OU site conspiratorially and pathologically conceal the value of two gain factors: The "Negative Henry" and "Negative Current". They are miscreants and should be punished for their deceptions.

[Allen Burgess]

from: synchro1 on Today at 11:05:28 AM

@Tinselkoala,

"A negative correlation means that there is an inverse relationship between two variables".

https://en.wikipedia.org/wiki/Magnetic_field#B_and_H

Note the graphic below. Nowhere is a "negative number" used or implied. Negative correlation means as one variable increases the other decreases, and positive correlation means as one variable increases, the other does as well, and when one variable decreases the other variable decreases too. It has nothing to do with negative values of the variables. The _slope_ of the regression line is either positive (positive correlation) or negative (negative correlation).

You really must stop posting your basic math errors and misconceptions.

Here's the comment of mine he's referring to as basic math errors and misconceptions: