Efficient Power Electronics Conversion TRIZ Cases

Controlled switch paths pre-charge resonant and driver capacitors during startup, cutting inrush stress and speeding zero-voltage switching.

High-frequency LLC converters and unfolding inverters replace bulky line transformers, extending ZVS and improving MV PV efficiency.

Inductor current polarity replaces noisy drain-source voltage sensing to tune synchronous rectifier timing for stable ZVS control.

Local PWM and zero-current detection lets each power phase enter low-power or idle modes, cutting quiescent drain at light loads.

Multi-element resonance enables soft switching in both power directions, extending voltage range while keeping bidirectional gain symmetric.

Sequential startup of parallel LLC converters sharing a resonant capacitor balances current and reduces leakage-inductor inrush voltage.

A power pulsation buffer stabilizes DC-link voltage so an unregulated DC-DC converter can cut capacitor size, complexity, and loss.

Varying diagonal switch OFF times each cycle uses resonance minima to cut switching loss and shrink cooling hardware.

By holding selected input-side conversion circuits in limited or zero-power states, this case prevents PV inverter startup hiccups and controller undervoltage.

Reduced stand-by switching frequency cuts converter losses while keeping output voltage ready for a clean, immediate welding start.

Burst-OFF PWM control with resonant sensing and DC-offset removal cuts light-load switching loss while keeping current delivery balanced.

DC-link voltage slope and capacitance preload the PFC control loop in burst mode, cutting light-load losses and limiting voltage overshoot.

A voltage-based period control scheme cuts low-load power use while keeping DC-DC converter output ripple and voltage variation in check.

Controlled transistor timing in light-load two-level mode cuts switching-node negative voltage drops, improving buck converter efficiency and reliability.

Soft-start phase-shift control pre-charges DC link capacitors, balances voltages, and prevents inrush current and transformer saturation.

Current sources parallel to low-frequency leg switches limit zero-crossing dv/dt, cutting bridgeless PFC EMI without bulky passive filters.

A reconfigurable switched-capacitor stage paired with magnetic regulation maintains efficient, fast output control across wide input voltages.

Voltage-threshold switching between SRC and LLC modes stabilizes output, improves efficiency, and extends hold-up time in DC converters.

Weighted slope compensation and FPWM/FCCM control speed DC-DC output tracking without widening loop bandwidth or losing stability.

Inductor-current sensing detects capacitor faults in a PFC power supply, preventing EMI filter resonance, heating, and damage.

Dual current hysteresis loops adapt synchronous rectification during load switching to curb secondary-side voltage spikes and power loss.

Multiple operating modes stabilize charging voltage while avoiding separate buck-boost stages, improving conversion efficiency and lowering cost.

Secondary-side zero-cross detection calibrates ACF primary FET dead time to prevent cross-conduction and improve zero-voltage switching.

By detecting converter saturation and adjusting conduction timing, this case limits undershoot and overshoot during input voltage swings.

A voltage-shift component and discharging branch cut switching and conduction losses in a buck converter while improving duty cycle control.

A dual-loop controller and resonant isolated transformer improve electrosurgical power response and temperature accuracy to limit collateral tissue damage.

Series impedance and compact layered insulation cut circulating winding losses while simplifying medium-frequency transformer construction.

Zero-current resonant switching lets this LC power converter run near 100 MHz with lower switching loss and die-level integration.

Current-sensed gating disables MOSFET PWM near zero crossing to curb reverse conduction, ripple current, and light-load losses.

A hybrid conductive-insulating substrate and back field plate cut drain leakage and parasitic capacitance while improving high-voltage behavior.

A sampled, gain-adjustable compensation path suppresses voltage spikes and sags during rapid load switching while protecting normal load operation.

Dynamic ramp compensation adjusts current-loop slope from input and output voltages to suppress subharmonic oscillation without hurting transient response.

An epitaxial shielding region deeper than the gate trench lowers gate oxide corner field stress while simplifying trench SiC MOSFET fabrication.

Adaptive dead-time control with current and voltage sensing enables full ZVS in a half-bridge power converter, cutting turn-on losses.

A semiconductor switch, decoupling inductor, and parallel diodes enable DC power cutoff with lightning and overcurrent protection at lower cost.

Three-mode MMC control uses arm inductor-capacitor resonance to achieve zero-voltage switching and cut switching loss.

Multiple controlled switches limit ATS inrush current during power transfer, cutting passive-circuit loss while maintaining capacitor charging.

Opposing current loops and a grounded conductive shield contain switching-regulator magnetic fields while improving heat dissipation.

Switching from secondary-side to primary-side feedback at light load lets the secondary controller sleep while keeping output stable.

Two pulse signals with different frequencies expand gain control range and cut output ripple in resonant converters under light load.

Phase-shifted multilevel converter legs and polygon-connected capacitors cut switching losses, ripple, and current stress in DC/DC conversion.

Distributed resonant circuits across both transformer windings cut common-mode EMI in a bi-directional CLLC solid-state transformer.

Burst-mode current control lets LED loads dim below minimum-rated current while maintaining precise light output and better power efficiency.

Direct AC-AC conversion with four-quadrant bidirectional switches removes the DC stage to improve efficiency, power density, and output regulation.

Envelope control uses resonant-current feedback and mixed voltage reference signals to widen LLC converter bandwidth and suppress low-frequency ripple.

Switching between pulse-frequency and pulse-width modulation avoids high-frequency loss in resonant converters at low voltage and light load.

Current-feedback soft bus clamp control cuts common-mode noise and switching losses without oversized passive filters.

Load-triggered feedback node pull-down and high-impedance switching cut isolated converter standby power while preserving regulation when needed.

Phase-shifted bridge arms and an inverting coupling transformer cut body-diode reverse recovery, enabling ZVS and lower common-mode interference.

A switched clamp replaces the clamping diode to recover leakage inductance energy, cut reverse recovery loss, and suppress EMI.