Efficient Power Electronics Conversion TRIZ Cases

A symmetric 2T-LLC topology uses two transformers and phase-shift control to widen bidirectional voltage gain while maintaining soft switching.

Delay-based secondary bridge control above resonance widens voltage gain while cutting reverse current and conduction loss in bidirectional DC converters.

A capacitor midpoint connection enables bidirectional buck-boost conversion while balancing switch voltage stress and suppressing parallel-module circulating currents.

Smart frequency modulation shifts an inverter between TCM and CCM to achieve zero-voltage switching and cut hard-switching losses.

A single voltage divider senses switch voltage to regulate PFC output while cutting circuit area and standby power at high voltage.

L-phase threshold comparison speeds phase-change detection in a totem-pole PFC circuit, turning off slow switches before short circuits occur.

A dual-path switched-capacitor 4:1 converter reconfigures capacitor connections to cut capacitor count, save chip area, and keep output stable.

A single resistor and half-cycle switching modules replace dual bridgeless PFC current sensors, cutting losses, complexity, and controller IO use.

Switchable voltage dividers and controller logic cut standby detection losses while preserving power factor correction when active.

A semi-active bridge rectifier uses op-amp-controlled switches to cut diode loss, avoid high-side drivers, and stabilize voltage conversion.

Local voltage sensing sets secondary switch hold time to achieve zero-voltage switching without primary-to-secondary communication.

Dynamic switching between off-state and complementary rectification cuts switching and conduction loss in critical-mode PFC circuits.

Discrete pulse-width control compensates voltage-switching delay in DC/DC converters, improving plasma stability and thin-film uniformity.

Asymmetric multi-pulse PWM raises inductor charge-discharge frequency, cutting ripple current, inductance, converter size, and cost.

A leakage inductor and unidirectional conduction loop suppress diode reverse recovery and enable zero-voltage switching in DC-DC converters.

A shunt resistor and DDA-based feedforward circuit keep the loop stable in DCM, speeding PWM restart and limiting overshoot.

Dynamic half-bridge pulse adjustment limits magnetizing current during mode changes, preventing transformer saturation and thermal imbalance.

Zero-current switching and mutual sync signals let parallel RSCC converters self-synchronize, cut switching loss, and improve EMI.

Phase-difference feedback limits ON-time correction in interleaved PFC, preserving input current waveform and power factor.

Dual-edge timing offsets align rectifier switch on/off triggers to cut conduction losses and prevent reverse current during transients.

A low-power first IC monitors IR commands and wakes a switched FET power path, cutting standby loss while preserving fast response.

Load detection and resonant frequency control keep HFAC current and voltage in range, reducing standing-wave losses, overheating, and shock risk.

A master channel regulates stacked power units to correct current detection errors, speed settling, and clamp high-voltage output.

A backstepping inner loop and super-twisting outer loop improve DC-DC converter robustness while reducing voltage and current ripple.

Input/output voltage sampling, duty-cycle counting, and digital filtering estimate DC-DC inductor current without lossy sensing circuits.

An overlap detector and control loop adjust high-side to low-side dead-time in a switching converter to cut dissipation and prevent shoot-through.

Switchable capacitor-resonance paths let one DC/DC converter change voltage gain quickly without replacing hardware.

Half-period timing control keeps parallel boost choppers phase-shifted and stable despite rectifier output fluctuations, reducing resonance.

A secondary-side resonance circuit stores and releases energy during current reversal to avoid transformer short-circuits and preserve output duty ratio.

A unified average current-mode PFC controller stabilizes CCM, CrM, and DCM transitions while improving efficiency and limiting EMI.

Control signals referenced to the switch midpoint remove isolators and level shifters, simplifying DC power converter control circuitry.

An RC filter conditions switch voltage sensing to offset parasitic inductance, improving synchronous rectifier timing and reducing converter power loss.

Using zero-crossing and apex timing of choke current, this case enables fast converter control with lower hardware demands and error checks.

A neutral line reactor and mode-switching control suppress third harmonic currents, stabilize resonance, and cut loss in low-voltage boosting.

Parallel adjustment inductors balance current across multiple LLC converter circuits, enabling higher power density and flexible output design.

Parallel rectifying branches and resonant excitation enable odd voltage conversion while cutting transformer turns, loss, and size.

A timed transistor on-period keeps switching above audible frequencies in low-load power supplies while maintaining stable output voltage.

Adjusting coil drive frequencies keeps resonant differences out of the audible band, reducing interference noise during multi-coil heating.

Output-voltage monitoring updates resonant timing in a half-bridge flyback converter, improving switching efficiency across wide output ranges.

Secondary-side control improves flyback PFC by using full load information, enabling variable-frequency single-stage conversion with lower stress.

Integrated MIM capacitive level shifters on a monolithic high-side GaN die cut substrate noise, quiescent current, and signal loss.

Burst-mode frequency control cuts light-load loss in active clamp isolated power supplies while preserving high power density.

Carrier delay between inverter PWM signals lowers DC link busbar and capacitor RMS current, reducing thermal stress and extending life.

Variable-frequency phase correction keeps interleaved totem pole PFC phases aligned, cutting ripple, switching losses, and distortion.

Millimeter-wave antenna isolation replaces optocouplers in an LLC switching power supply to cut delay, save area, and support high-frequency control.

Periodic output power feedforward speeds PFC response to load transients, reducing bulk capacitor size and voltage rating in AC-DC converters.

Bypass-diode current sensing lets a totem pole PFC detect surge conditions early and switch off vulnerable devices before breakdown.

Adjusting low-side transistor on-time controls circulating current so the high-side transistor reaches zero-voltage switching with lower loss.

A compensation-driven PWM duty cycle smooths charge pump to regulation transitions in multi-level converters, cutting transients and over-voltage faults.