Efficient Power Electronics Conversion TRIZ Cases

PWM-controlled bidirectional conversion maintains a target DC bus voltage in real time, improving efficiency and thermal behavior without hardware changes.

A parallel accelerator injects transient power onto a factorized bus to cut voltage droop and peak spikes during rapid CPU and GPU current steps.

Trajectory control adjusts bridge switch timing around a piezoelectric transformer to lift converter efficiency from about 30% to at least 80%.

Dynamic offset timing synchronizes two boost phases for valley switching, improving power factor and cutting switching losses.

Capacitor voltage sampling replaces current transformers and sensing resistors to cut loss and cost in resonant current detection.

Harvesting parasitic oscillation energy enables zero-voltage switching in a totem-pole PFC boost stage, cutting losses and dissipation.

PWM-driven synchronous rectification in totem pole PFC cuts freewheeling transistor losses by switching on voltage thresholds.

Replacing diodes with a second switch transistor cuts voltage drop and power loss while avoiding extra PWM controller cost.

Adjusting synchronous rectifier body diode conduction time creates frequency jitter in LLC resonant circuits to cut switching noise under light load.

Midpoint-voltage feedback tunes negative excitation current in a hybrid flyback circuit to achieve quasi-ZVS while cutting conduction and core losses.

Short switch toggling recharges the bootstrap capacitor in an H-bridge gate drive, cutting capacitor size, weight, and distortion.

Dynamic inductance control keeps zero-voltage switching efficient as DC-DC converter output changes, reducing power loss across load levels.

Switched control of two input-side switches charges the output capacitor at startup while limiting inrush current and component stress.

A depletion-mode sensing transistor and comparator shut off an integrated GaN switch at saturation, reducing parasitics and external gate power.

A pre-charge circuit readies the detector transistor for faster current reversal sensing, cutting reverse current and high-voltage transients.

By discharging the rectifier into the transformer before turn-on, this control circuit lowers main transistor switching loss and boosts efficiency.

Valley-timed sync switch control enables zero-voltage switching when input voltage nears output voltage, cutting switching loss.

A demagnetization timing check stops SR transistor mis-triggering during resonance, improving flyback power efficiency and stability.

By disabling selected rectifier conduction near line zero crossings, this PFC control cuts light-load current spikes, distortion, and EMI.

Current-sense and line-voltage thresholds let power switches self-time turn-off for ZVS, improving converter efficiency and control bandwidth.

Time modulation adjusts switching period instead of frequency to stabilize LLC resonant converter output under light load and widen control bandwidth.

Counters and detection signals automatically tune ARCPI boosting current to keep zero-voltage switching stable despite temperature and aging.

Primary-side sensing of resonant and magnetizing currents estimates LED load current, avoiding SELV barrier signal transfer and cost.

A flying-capacitor bridgeless totem-pole boost PFC uses zero-crossing switch control to cut line-current distortion at light loads.

A switch-matrix ladder converter changes capacitor-node connections to keep high efficiency across wide voltage ratios and support embedded power factor correction.

Threshold-based switching between an LDO and Dixon charge pump keeps output voltage continuous and stable across a wide input range.

During switch dead time, an inductive branch moves parasitic-capacitor charge between branches to cut switching loss and raise efficiency.

Multi-mode rectifier control switches gain by input and output voltage to maintain power factor correction and efficiency across wide ranges.

A mirrored switch and resistor estimate switched-capacitor regulator output current while reducing I2R loss and easing voltage sensing.

Progressive switch turn-on in transformer and synchronous rectification stages suppresses DCDC start-up surge current and protects switches.

Dynamic Ton and Toff control adapts to load and inductor voltage to stabilize output regulation across CCM, TM, and DCM.

Threshold-synced feed-forward duty-cycle control smooths synchronous/asynchronous transitions in DC-DC converters to limit ripple.

Duty cycle variation balances parallel interleaved LLC converters despite component tolerances, reducing losses and stabilizing operation.

Dynamic minimum-period control balances bus voltage stability, standby power, and EMI in LED lighting power converters.

A shared active snubber cuts buck converter surge voltages with fewer switches and lower switching loss in continuous mode.

Adaptive resonant and ZVS pulse control cuts light-load power loss in a resonant flyback converter while maintaining capacitor discharge.

Placing the electrical filter on the DC side cuts switching noise near its source while reducing power loss, heat, and noise leakage.

Isolation rings split high-voltage domains so P-type drivers keep separate bulk potentials and avoid interference without process changes.

Ramp-based buck and boost control avoids unstable four-switch operation, cutting switching loss while improving load response and output stability.

Switchable resonant bypass paths linearize voltage gain in a bidirectional DC-DC converter, widening output range and improving control stability.

Inductor current cross-zero detection shifts a buck converter into intermittent PFM and trims internal power use to extend standby time.

A shared-core PFC inductor layout suppresses common-mode noise and EMI while reducing board area, material cost, and power module footprint.

A hybrid charge-pump converter switches from Dickson cold start to efficient normal operation while sharing capacitors to limit footprint.

Differential auxiliary-winding sensing improves SNR across 5V-48V output ranges while enabling quasi-resonant PWM control in an AHB flyback converter.

A series LC resonant path replaces triangular inductor current with a sine wave, reducing conduction loss while widening non-isolated DCDC output control.

Variable switching duty linearizes LLC converter gain, reducing output current ripple and enabling stable low-gain, low-load control.

A variable impedance branch shifts LLC resonant frequency to regulate output voltage across wide input ranges while maintaining ZVS.

Feed-forward PFM control helps LLC resonant converters handle input voltage disturbances with faster transient response and less need for large capacitors.

A quasi-resonant switching converter adjusts peak current signals to achieve valley-switching.

A resonant power converter uses a full-wave rectified signal to drive high-side and low-side transistors.

Constant on-time control replaces fixed frequency logic in buck-boost converters, eliminating output voltage spikes during mode transitions.