What Is the Resonant Half-Bridge ZVS Inverter Dead-Time Calculator?
Zero-Voltage Switching (ZVS) eliminates capacitive turn-on switching loss in high-frequency power converters by discharging MOSFET drain-source output capacitance prior to gate gate turn-on.
During the dead-time blanking interval between high-side and low-side switch conduction, circulating magnetizing inductive current swings switch midpoint node voltage completely rail-to-rail.
This calculator predicts the peak magnetizing current, minimum required dead-time, and recommended timing window given DC bus voltage, Coss capacitance, and magnetizing inductance.
How Does the Resonant Half-Bridge ZVS Inverter Dead-Time Calculator Work?
The calculation evaluates user-provided measurements using recognized domain equations, converts between measurement units, and adjusts for real-world efficiency factors.
Resonant Half-Bridge ZVS Inverter Dead-Time Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Charge conservation and magnetizing energy equilibrium during bridge pole transition.
How to Use the Resonant Half-Bridge ZVS Inverter Dead-Time Calculator
- Enter your primary measurements in the input fields above.
- Select your preferred units (e.g. metric or imperial) if applicable.
- Review or adjust operational assumptions such as field efficiency.
- Click Calculate to instantly generate the full results breakdown and visual chart.
- Use the Reset button at any time to clear the form and test a new scenario.
Step-by-Step Example Calculation
400V Bus 100kHz LLC Half-Bridge (Coss = 180pF, Lm = 450μH)
Input Values:
Understanding Your Result
Your calculated result represents the realistic operational capacity or baseline output under the specified conditions. Comparing theoretical and effective outputs reveals the direct impact of turns, overlap, and practical downtime.
Factors That Affect the Result
Field terrain, operator experience, equipment maintenance, overlap margin, and weather conditions can significantly influence real-world output.
When Should You Use This Calculator?
Use this calculator whenever you need quick, verified estimates for job planning, budgeting, equipment sizing, or project timelines.
Assumptions & Limitations
- Switching Period: T_sw = 1 / f_sw; Half-period t_half = T_sw / 2.
- Peak Magnetizing Inductive Current: I_mag,pk = (V_dc · t_half) / (4 · L_m).
- Total Switched Node Capacitance: C_node = 2 · C_oss + C_xfmr (approx 2 · C_oss).
- Minimum ZVS Dead-Time: t_dead,min = (C_node · V_dc) / I_mag,pk.
- Recommended Dead-Time: t_dead,rec ≈ 1.25 - 1.50 × t_dead,min to provide robust margin.
Frequently Asked Questions
Calculation Accuracy & Reference Note
This calculator implements verified, deterministic mathematical equations based on published standards. Results should be treated as professional engineering estimates; always verify critical operations with local equipment manuals and site inspections.