O que determines an inductor's inductance?

Indutância depends on: number of turns squared (N²), core material permeability (μ), cross-sectional area (A), e length (l). L = μN²A/l. Ferrite ou iron cores dramatically increase inductance compared to air cores.

Por que do inductors oppose current changes?

Changing current creates a changing magnetic field, qual induces a voltage opposing o change (Lenz's law). Este back-EMF resists current increase e sustains current during decrease. It's like inertia for electrical current—inductors resist qualquer change in current flow.

O que é mutual inductance?

Quando two inductors share magnetic flux, changing current in one induces voltage in o outro—este é mutual inductance, measured in henrys. Transformers use este principle. Mutual inductance M relates to coupling coefficient k: M = k√(L₁L₂).

Por que do PCB traces têm inductance?

Qualquer conductor carrying current creates a magnetic field, giving it inductance. A straight wire tem sobre 1 nH per mm length. At high frequencies (100+ MHz), mesmo short traces act as significant inductors. Este parasitic inductance affects signal integrity e must be considered in RF design.

Indutância Converter

Sobre Indutância Conversão

Indutância measures a component's tendency to oppose changes in current by storing energy in a magnetic field. Quando current through an inductor changes, it generates a voltage esse resists esse change—este é electromagnetic induction, described by Faraday's law. O induced voltage V = L(di/dt) é proportional to ambos inductance e rate of current change. Este property makes inductors act like electrical inertia, smoothing current variations in power supplies e blocking high-frequency signals while passing DC.

O SI unidade é o henry (H), definido as o inductance producing 1 volt quando current changes at 1 ampere per segundo. Named after Joseph Henry who discovered self-inductance independently of Faraday. Inductors são essential in switching power supplies (storing energy entre switching cycles), RF filters (frequency-selective circuits), transformers (coupling entre windings via mutual inductance), e motors (creating rotating magnetic fields).

Our converter handles todos padrão inductance unidades usado in electronics, power systems, e electrical engenharia.

Comuns Indutância Conversions

De	Para	Multiplicar Por
H	mH	1,000
mH	H	0.001
H	μH	10⁶
μH	H	10⁻⁶
mH	μH	1,000
μH	mH	0.001
μH	nH	1,000
nH	μH	0.001
H	nH	10⁹

Indutância Referência de Unidades

Henry (H) – O SI unidade, producing 1 volt quando current changes at 1 ampere per segundo. Named after American scientist Joseph Henry who discovered self-inductance in 1831. One henry é relatively large—achieving it requires muitos turns of wire around a high-permeability core. Large power transformers e filter chokes reach several henrys. Primary windings of mains transformers typically measure 1-100 H.

Millihenry (mH) – 10⁻³ H, comum in audio e power aplicações. Speaker crossover inductors: 0.1-10 mH. Potência supply chokes e filter inductors: 1-100 mH. Relay coils e solenoids: 10-500 mH. Motor windings typically fall in este range. Wirewound inductors com ferrite ou iron cores achieve millihenry values in prático sizes.

Microhenry (μH) – 10⁻⁶ H, o workhorse unidade for power electronics e RF circuits. Switching power supply inductors: 1-1000 μH depending on frequency e power level. EMI filter chokes: 10-100 μH. AM radio antennas: 100-500 μH. Higher frequencies require lower inductance—MHz-range circuits use single-digit to tens of microhenrys.

Nanohenry (nH) – 10⁻⁹ H, essential for high-frequency RF e microwave work. GHz-range matching networks use 1-100 nH inductors. Chip inductors for wireless aplicações: 1-100 nH. Critically, todo conductor tem parasitic inductance—aproximadamente 1 nH per millimeter of wire ou trace length, qual significantly impacts GHz circuit design.