What is the formula for RL 电路Time常数Calculate器?

Core formula: τ = L/R ｜ i(t) = (V/R)·(1 − e^(−t/τ)). The tool returns results instantly using this formula and the selected parameters.

RL 电路Time常数Calculate器

Favorite

RL Series电路Time constant τ = L/R，及上电后任意时刻的current。

Key points

RL 电路Time常数Calculate器: RL Series电路Time constant τ = L/R，及上电后任意时刻的current。 Formula: τ = L/R ｜ i(t) = (V/R)·(1 − e^(−t/τ)). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. RL 电路上电时current按指数规律上liter，and RC 电路充电曲线形式相同。 Inductancecurrent不能突变：上电瞬间Inductance相当于断路，steady state时相当于短路（ideal）。

Inputs

τ = L/R ｜ i(t) = (V/R)·(1 − e^(−t/τ))

Calculation model (updates with parameters)

Time constant τ	100 µs	τ = L / R
steady stateCurrent I(∞)	50 mA	I(∞) = V / R
t = 0.000100 s 时current	31.61 mA	i(t) = I(∞)·(1 − e^(−t/τ))
τ 时刻current	31.61 mA	63.2% steady stateValue（1 − e⁻¹）
5τ 稳定Time	500 µs	current达到steady state 99.3%

Engineering notes

RL 电路上电时current按指数规律上liter，and RC 电路充电曲线形式相同。
Inductancecurrent不能突变：上电瞬间Inductance相当于断路，steady state时相当于短路（ideal）。
τ 越大current上liter越慢；Switchsupply续流、继电器线圈、motor绕组都涉及 RL Time常数。

FAQ

What is RL 电路Time常数Calculate器 for?: RL Series电路Time constant τ = L/R，及上电后任意时刻的current。
What is the formula for RL 电路Time常数Calculate器?: Core formula: τ = L/R ｜ i(t) = (V/R)·(1 − e^(−t/τ)). The tool returns results instantly using this formula and the selected parameters.
What engineering notes should I keep in mind when using RL 电路Time常数Calculate器?: RL 电路上电时current按指数规律上liter，and RC 电路充电曲线形式相同。 Inductancecurrent不能突变：上电瞬间Inductance相当于断路，steady state时相当于短路（ideal）。 τ 越大current上liter越慢；Switchsupply续流、继电器线圈、motor绕组都涉及 RL Time常数。