电容电量计算器
显示具有时常和能量的RC电路充电或排气曲线。
输入结果时更新 。
关于此计算器
Capacitor charge is the electric charge a capacitor holds in the field between its plates, Q = C × V in coulombs, and the energy stored is E = ½ × C × V² in joules, so doubling the voltage quadruples the stored energy. When you charge a capacitor through a series resistor, the voltage does not jump instantly — it rises along the curve V(t) = V × (1 − e^(−t/τ)); discharging, it falls along V(t) = V × e^(−t/τ). Both are governed by the time constant τ = R × C, the natural timescale of the RC circuit.
After one time constant the capacitor reaches about 63% of the supply voltage when charging (or falls to 37% when discharging); after 5τ it is within 1% of its final value and is treated as fully charged or discharged. For example, a 1,000 µF capacitor charged through a 1 kΩ resistor has τ = 1,000 × 10⁻⁶ × 1,000 = 1 second, so it is 63% charged after 1 s and essentially full after 5 s. At 5 V that same capacitor stores Q = 0.001 × 5 = 0.005 C and E = ½ × 0.001 × 25 = 0.0125 J.
Enter the supply voltage, capacitance and series resistance and the calculator returns the full charge, the stored energy, the time constant, the settling time (5τ), the voltage at a chosen instant, and the whole charge or discharge curve. These numbers are the everyday basis for RC timing circuits, power-supply smoothing, debounce delays, flash-photography energy storage and the turn-on delays in analogue electronics.
经常问到的问题
RC电路的时间常数是多少?
The time constant τ = R × C is the time to charge to about 63% of the supply voltage. After 5τ the capacitor is regarded as fully charged (>99%).
电容器商店能用多少能量?
E=1⁄2 × C × V2. 5V仓库的1⁄2 × 0.001 × 25 = 0.0125焦耳的1 000微F电容器。
收费和履行之间有什么区别?
向供给的电压上升为V(1 - e( t/ ) e); 排放从启动电压下降为 V( t/ ) 。 两者在5 个时间常数之后都达到~ 99%的变动。
电容器能承受多少电荷?
电荷为Q = C × V, 直径为 Culombs. 5 V. 的A 1,000 微F 电容器持有0.001 × 5 = 0.005 C. 大容量或高压两种电荷都直接储存更多电荷。
电容器完全充电多久?
Practically, after five time constants (5τ = 5RC) it is within about 1% of the supply and treated as full. With a 1 kΩ resistor and 1,000 µF capacitor τ is 1 s, so it is essentially charged after roughly 5 seconds.
每次固定后达到的百分比是多少?
充电量在1 ～ 1%之后达到63%,在2 2%之后达到86%,在3 ～ 2%之后达到95%,在4～ 4%之后达到98%,在5～ 4%之后达到99%。 焦热情况与镜像相同:37%、14%、5%、2%和1%仍停留在同一点。
为什么要加上连环抵抗者?
阻力器设定了充电速度。 没有它, 开关时的当前加压只能受迷路阻力的限制, 并且可能很大; 阻力器可以预测时间, 这正是RC计时器、 过滤器和拆弹电路所依赖的。
API - 使用代码中的计算器
将此计算器称为自由 JSON 端点 。 不需要按键 。 将字段值发送到下面作为查询参数或 JSON 。 任何您省略的, 都会使用相同的默认值, 此页面预填的默认值是预填的; 未知参数是 400, 而不是静音零 。 读取 API 全部文件 →
终点
GET https://calculator.free/api/v1/capacitor-charge/curl
curl "https://calculator.free/api/v1/capacitor-charge/?mode=charge&voltage=5&capacitance=1000&resistance=1000"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/capacitor-charge/?" + new URLSearchParams({
"mode": "charge",
"voltage": "5",
"capacitance": "1000",
"resistance": "1000"
}));
const data = await r.json();
console.log(data.results);成果仅是一般指导的估计数,而不是财务、医疗或税务咨询。