Efficient Power Electronics Conversion TRIZ Cases

Pulse-edge excitation in an LC bridge circuit enables precise inductive susceptor heating for aerosol generation without combustion.

An auxiliary switch adds capacitance only at heavy load to suppress radiated EMI while keeping switching loss and light-load efficiency in check.

Switchable transformer turns ratios and rectifier series-parallel links widen EV charging voltage coverage while preserving conversion efficiency.

A piezoelectric resonator replaces magnetic energy storage in a DC-DC converter, enabling soft-charging, high power density, and galvanic isolation.

A five-leg core and planar windings create controllable leakage inductance while cutting magnetic losses and preserving power density.

Channel-voltage comparison and pull-up/pull-down gate control prevent premature synchronous rectifier shutdown and preserve conversion efficiency.

Secondary reverse current is timed to discharge primary-switch capacitance, cutting flyback switching loss without an active clamp.

Mounting DC/DC power modules on both PCB sides cuts footprint and enables a shared heat sink for better cooling and lower cost.

By tuning converter parameter tables from PF, THD, and harmonic feedback, LED drivers maintain performance across changing load conditions.

Switchable transformer turns ratio and rectifier connections widen EV charging output voltage while preserving conversion efficiency.

A pre-turn-on pulse drives the secondary switch through isolation so the flyback main transistor turns on near zero voltage, cutting DCM losses.

Bus-voltage compensation adjusts primary peak current in a quasi-resonant flyback to suppress power-frequency ripple and stabilize output.

PWM precharge brings the series capacitor toward half the input voltage, raising duty cycle and cutting switch and inductor losses.

Phase-shifted half-bridge stages on isolated SST outputs widen voltage range while sharing an inductor and avoiding efficiency loss.

A secondary resonant capacitor enables bidirectional DC-DC energy transfer with zero-voltage switching, cutting hard-switching losses.

A time-varying threshold and offset current control let a DC-DC converter start in diode emulation mode with monotonic output voltage rise.

A switchable drive supply lets a SEPIC synchronous rectifier use drive or output voltage, extending output range and supporting fast MOSFET switching.

A shared converter handles AC PFC and backup DC/DC modes in a dual-DC-bus UPS, cutting component count, cost, and unused hardware.

Timed resistor-switch discharge lowers DC link capacitor voltage before startup, preventing current surge and noise in resonant converters.

Zero-crossing control switches PFC converters between linear and nonlinear modes to improve gain and response while preserving loop stability.

Resonant clamping and LC action enable soft switching across a wide input range, cutting conduction and reverse recovery losses.

Independent phase correction at positive and negative resonance poles improves converter stability margin and suppresses negative-sequence currents.

Stacking the inductor above a PCB-embedded IC cuts parasitic loss, supports higher switching speed, and shrinks DC-DC converter footprint.

Dynamic load-based frequency control helps isolated SMPS enter light-load mode smoothly, cutting audible noise and easing loop compensation.

Adaptive blanking masks valley detection in a flyback converter to limit switching frequency, cut switching losses, and preserve efficiency.

Timed sampling of switch-node and primary-current signals improves light-load regulation in active clamp flyback converters despite leakage inductance.

A distributed air-gap magnetic structure shrinks LLC converter magnetics while balancing core and copper loss to preserve efficiency.

Sampled switch voltage is used to tune synchronous rectifier dead time, preventing shoot-through while reducing dead-time loss in converters.

Dynamic comparator reference adjustment offsets IC and filter delay in critical-mode PFC, improving zero-current detection and reducing converter loss.

PWM duty cycle carries secondary output voltage across the isolation barrier, enabling more accurate regulation and faster response.

A superposition voltage with triangular-wave injection stabilizes converter frequency, prevents grouped feedback ripples, and eliminates audio noise.

Sequenced RC-network switching and amplifier control reduce PWM-PFM transition transients while maintaining accurate DC-DC output regulation.

Dynamic duty-cycle-based thresholds prevent false over-current triggering in dual-output LLC resonant converters under asymmetric PWM control.

Resonant ZVS networks let silicon inverter switches achieve soft switching at high frequency, cutting losses, EMI noise, and timing complexity.

Dynamic mode switching between direct-charge and buck paths matches battery current needs to raise charging speed without overcurrent damage.

At critical duty cycles, synchronized lower-switch edges and phase-shift control preserve ZVS in flying capacitor rectifiers while limiting loss and EMI.

A buried-grid Schottky-MOSFET cuts body-diode losses and parasitics while preserving voltage blocking for higher-frequency power switching.

Secondary ON-time sampling adjusts peak current timing to keep CCM flyback output current stable despite varying initial coil current.

External AC drive with on-package transformer rectification delivers low-voltage high current to VLSI dies with less heat and silicon overhead.

Separate energy transfer inductors on parallel primary windings suppress circulating currents, cutting transformer losses and cost.

A perpendicular transformer and PFC inductor layout with rear-side heating elements cuts adapter volume while preserving power output.

Synchronized ADC sampling at the PWM period avoids low-pass filters in LED ballast feedback, improving dimming response and reducing circuit complexity.

Skipping low-side resonant pulses at light load cuts switching loss and heat while extending ZVS in a resonant half-bridge flyback converter.

A current source module maintains capacitor charge balance in a modular DC/DC converter, enabling bidirectional HVDC-LVDC transfer with lower losses.

A shared three-pillar magnetic core and opposing winding paths cut flux leakage, core loss, and inductor volume in high-power modules.

Periodic sensing and mode switching cut standby drain in solar-linked battery converters, helping prevent over-discharge at low charge.

An active discharge path releases resonant capacitor charge before restart, limiting current spikes that could damage the auxiliary switch transistor.

An active discharge path releases capacitor charge before restart, limiting resonant current and protecting the auxiliary switch transistor.