Efficient Power Electronics Conversion TRIZ Cases

A controller switches the discharge path by load type, preventing capacitor-voltage damage in resonant converter output circuits.

Adjustable feedback scaling improves secondary-side current sensing in isolated LED converters while balancing low-current signal quality and high-current losses.

Dynamic switching-frequency compensation suppresses DC ripple reflected into a CLLC converter, stabilizing charging current and extending component life.

Independent switch control keeps flying capacitor voltage near half the output, cutting switch stress and inductor ripple in 3-level PFC circuits.

A dummy sense region with Schottky-connected sensing blocks forward current, improving SiC MOSFET current accuracy without ammeter damage.

Parallel converter units with dedicated sensors are duty-cycle controlled to keep sum-current measurement accurate across wide, fast-changing ranges.

A detector circuit monitors forward-node voltage to disable the synchronous rectifier during cross-conduction, protecting switches and preserving efficiency.

Pulse-skipping converter control limits output voltage rise under low or no load, cutting display power use while keeping drive voltage stable.

A low-Q resonant single-stage solid-state transformer uses soft switching to cut standby loss, size, and control complexity in low-power conversion.

Asymmetric interleaved switch control cuts MOSFET hard-switching losses in full-bridge resonant converters while improving efficiency and heat distribution.

Interleaved smart-PWM control alternates full-bridge MOSFET states to cut switching loss, spread heat, and stabilize light-load output.

Reconstructing PFC input current from measured voltages avoids costly sensors while maintaining PF and THD in totem-pole converters.

Alternating inner and outer transistor switching each half-cycle balances ANPC converter losses and reduces loss fluctuation.

A resonant-voltage gate drive lets a synchronous rectifier replace diodes in ZVS boost and buck converters, cutting switching loss and power dissipation.

Secondary-side voltage difference detection drives current pulses for faster synchronous rectifier response and reduced output voltage drop.

An active-diode SR sensing path improves flyback line feed-forward accuracy while cutting low-load current loss and detection delay.

Adaptive resonant-period detection updates AHB flyback drive timing as output voltage changes, improving DC-DC conversion efficiency.

Peak current sensing estimates switch turn-off timing for DCM buck-boost conversion without a zero-current detection circuit.

Bypass capacitors and phase-shifted switching stabilize hold-up output voltage in a three-phase resonant converter during input failures.

Threshold-based PWM control turns off the low-side switch on resonant current to preserve ZVS and efficiency across wide output voltages.

Pairs of flying capacitors and linked subcircuits let this converter regulate DC output by switching frequency while handling high input voltage and power.

Selective conduction engages the acceleration branch only in specific periods to speed semiconductor switching while limiting abrupt stress.

A hybrid Si-GaN switching circuit shifts conduction to silicon and uses GaN briefly for fast transitions, cutting thermal stress and switch losses.

Balanced choke inductance and parasitic capacitance in a resonant tank suppress common-mode current, cutting EMI, volume, and loss.

Pairs of flying capacitors and modular subcircuits let this resonant DC-DC converter scale to high input voltage and high power with frequency-based output control.

Resonant-voltage gate control lets a synchronous rectifier replace diodes, enabling ZVS DC-DC conversion with lower losses and no extra gate driver.

An embedded Rogowski coil senses DC link capacitor current to shut off SiC converter switches faster and avoid desaturation false trips.

Primary-side phase-based load estimation replaces current sensors in an LLC power supply, cutting size, loss, and parts count.

A single resonant transformer circuit uses switched rectification and feedback control to deliver multiple output voltages with lower size and cost.

Dead-time overlap control and regenerative capacitor voltage balancing help sustain power conversion efficiency as load states change.

Phase-based feedback in an LC resonant inverter enables zero-voltage and zero-current switching to cut losses and transistor stress.

Periodic resonant-tank shorting and body-diode-based switching enable efficient bidirectional DC/DC power transfer with low losses.

A three-phase half-bridge shapes AC output for high power factor while removing bulky inductors and DC link capacitors.

Time-period-based slope control keeps PFC transistor on-time accurate at low output voltage and varying AC input levels.

Gradual zero-crossing duty-cycle control in a totem-pole PFC suppresses current spikes and EMI without raising THD.

Adjustable resonant tank short-circuit timing enables bidirectional LLC DC/DC power transfer with zero-voltage switching and lower losses.

Lower-permeability edge blocks shape leakage inductance in a planar transformer while improving thermal management and power density.

A small DC offset at the PFC current multiplier cuts burst switching at light or no load, lowering idle power while keeping output voltage stable.

Dual control signals from isolated circuit and load-state monitoring disable MOSFET rectification during voltage swings, light load, and overload.

Integrated sensing of resonant capacitor voltage slope and threshold improves auxiliary switch timing, reducing stress and losses during transients.

Two series inductor paths let one resonant converter drive high- and low-voltage LED loads with low THD and reduced component stress.

Resonant frequency and duty-cycle control enable soft switching in a full-bridge DC converter, cutting losses and stabilizing output voltage.

Parallel MOSFET cells with staggered gate timing and resistive damping cut buck converter ringing, voltage spikes, and EMI.

A small DC offset at the PFC current multiplier cuts burst switching at light or no load, reducing idle power while keeping output voltage stable.

Squared input-voltage control with adaptive error-amplifier gain cuts zero-crossing distortion and harmonics in PFC converters.

A PRSS resonant tank keeps wireless inductive power transfer nearly constant under coil misalignment by adjusting impedance and current.

Periodic synchronous rectifier turn-on keeps light-load switching above the audible range, suppressing power supply noise without extra loss.

By shifting resonant operation and burst mode with load, this architecture spreads losses across circuits and supports fanless high-density power supplies.

Mode detection adjusts transistor turn-off timing in power converters to cut standby loss, limit EMI, and preserve efficiency.

Series-connected resonant capacitors create a multidimensional multiphase LLC converter that scales power without adding control circuit complexity.

Added diode, pull-up, pull-down, and transistor circuitry detects zero current in DCM boost converters while limiting LX-node ringing and amplifier stress.

Using low-voltage DC output to feed auxiliary power removes the power-frequency transformer, cutting weight, cost, and 10 kV insulation needs.

Integrated transformer and resonant inductor structures improve current sharing, cut winding losses, and raise three-phase LLC converter power capability.

Leading synchronous rectifier phase control keeps output voltage above threshold while extending hold-up time and balancing three-phase currents.

A regulated negative charge pump stabilizes gate bias in MRAM to suppress parasitic current and preserve read margin at high temperature.

A series switching and capacitor topology enables high step-up DC/DC conversion with lower-voltage semiconductor switches, cutting cost and losses.

Coordinated primary and secondary switch timing prevents false synchronous rectifier turn-on, reducing cross-conduction and switching loss.

Separating high-loss switches onto a heat-sinked substrate and others onto a PCB improves cooling, space use, and semiconductor flexibility.

A resonant switched capacitor converter uses zero-voltage or zero-current switching to cut high-frequency losses and improve DC balancing efficiency.

Zero-crossing voltage sensing lets a boost converter maintain CrCM operation, raise switching frequency, and prevent over-current.

Current-based PMOS gate control suppresses boost converter voltage leap-up and stabilizes output when input exceeds the target level.

A magnetically coupled auxiliary converter adds current only during load transients, holding output voltage steady while limiting heat near the load.

Primary-side current sensing with double integration enables charge-based full-bridge control that widens bandwidth and removes output ripples.

Magnetically coupled current sensing and ramp-based PWM control improve power factor, cut harmonic distortion, and reduce measurement loss.

Phase-shift control keeps a resonant DC-DC converter in ZVS across wide voltage and load ranges, cutting switching and conduction losses.

A transformer-buck architecture widens DC/DC output range while lowering switch voltage ratings and removing the buck input capacitor.

Phase-leading sense compensation corrects control delays in synchronous rectifiers, cutting switching loss and improving ZVS/ZCS timing.

Equal anode voltages and balanced capacitance paths suppress rebalancing-current heating in switched-capacitor voltage conversion.

Split resonant capacitors or inductors equalize current in parallel DC/DC converter bridges, limiting circulating currents and loss imbalance.

A half-bridge PFC circuit converts three-phase AC directly to higher or lower DC output, cutting component count and avoiding downstream converters.

Piecewise duty-cycle and pulse-width control expands LLC converter power range, cuts switching losses, and maintains low-load output voltage.

An auxiliary-coil snubber topology suppresses surge voltage while cutting circuit loss by optimizing transformer turn ratios and energy recovery.

Feedforward-assisted mode switching improves resonant converter response while reducing light-load noise, flicker, and power fluctuation.

An auxiliary switch loop uses coupled-inductor leakage inductance to enable soft switching in CCM without extra passive parts or higher circuit stress.

Reflected secondary-side voltage keeps hold-up capacitors charged, enabling fast source switching and longer fault ride-through for data center loads.

A gain modulator, current source, and comparator improve PFC input current sensing to keep AC current in phase and cut power loss.

Parallel buck-boost DC/DC modules keep electrofusion welding voltage stable as battery charge drops, improving portability and weld control.

A zero-crossing detector senses sharp SR drain-voltage changes in CCM to shut off the rectifier before cross-conduction and negative spikes.

Differential PCB feedback traces improve output-voltage sampling accuracy under high load current, helping keep power supply voltage stable.

A switched boost-bypass circuit cuts booster output when input voltage is high enough, reducing power loss, heat, and RRU cable burden.

Load sensing switches between larger and smaller MOSFET dies to cut light-load power loss without adding multi-phase size and cost.

An auxiliary switch and parallel inductor path enable zero-voltage turn-on, cutting switching loss for higher-frequency power supplies.

An SMPS oscillator switches between fixed and variable frequency by load to stabilize output voltage and cut quiescent current.

Bifurcated auxiliary windings and diodes suppress SR body-diode conduction in a ZVS flyback converter, cutting secondary stress and punch-through risk.