Efficient Power Electronics Conversion TRIZ Cases

Opposed switch-capacitor winding cells manage leakage inductance, enable bidirectional power flow, and keep power converters compact.

Current-wave shaping forces thyristor current below holding level before AC zero crossing, cutting unintended flow and THD in bidirectional totem pole PFC.

Variable ON-time control generates reactor reverse current to sustain ZVS across AC output voltage changes while limiting switching-frequency variation.

When PV string voltage is high, turning off DC-DC stages lets the DC-AC converter handle MPPT and cuts reactive power loss.

By raising resonant capacitance during Q-value sensing, the charging coil detects stylus attachment accurately without a Hall sensor.

Real-time phase-difference feedback adjusts the lagging bridge angle in LLC converters to avoid hard switching and reverse recovery loss.

Wide-bandgap FETs enable higher-frequency power conversion with less heat, reducing converter size and weight in portable power supplies.

Separating switched-capacitor voltage transformation from regulation cuts energy loss and component stress in modular power converters.

Out-of-phase switching combinations and interleaved capacitor placement cut ripple and AC loss while reducing capacitor count and module size.

Capacitor discharge time is used instead of tiny shunt voltage to detect overcurrent accurately during low-power buck-boost converter operation.

Mode switching between full-bridge and split half-bridge control widens LLC converter output voltage range while keeping regulation efficient.

A monitored linear gate-voltage pull-down cuts MOSFET false turn-off while limiting drain-source disturbance in resonant converters.

Parallel resonant LLC circuits raise power output while sharing complementary gate drive signals to simplify control and limit control circuit growth.

Load-based state switching skips soft end at burst-mode entry to restrain DC-DC output overvoltage while reducing transformer noise.

An H-bridge inductor enables zero-voltage switching in parallel multilevel inverters, cutting light-load reverse switching loss.

Bootstrap capacitor charging across three switches powers integrated drivers in a non-isolated resonant converter, cutting isolation complexity and cost.

A ZCD-based PFC control circuit shifts to discontinuous conduction at high line and light load to reduce efficiency loss.

Charge control with input feedforward widens control response in an isolated resonant DC-DC converter while reducing low-frequency output ripple.

Adaptive secondary winding voltage sensing times synchronous rectifier switching to prevent primary-secondary cross-conduction and improve efficiency.

Real-time switching between boost circuit control modes cuts conduction and switching losses to improve power conversion efficiency.

Middle gate voltages during dead time cut SiC-MOSFET body diode current, reducing loss and suppressing device deterioration.

Switchable transformer turns let one resonant power supply adapt efficiently to wide input and output voltages, reducing model variety and cost.

A superimposed ripple signal helps dual active bridge converters avoid dead-time stagnation and maintain stable monotonic control.

Parallel current-sense branches let an LED driver detect failed resistors and enter safe mode without adding extra power loss.

Active ground balancing equalizes inverter terminal voltages, cutting SiC MOSFET stress and extending photovoltaic string inverter life.

A dual hard- and soft-switching circuit stores and recovers transition energy to cut DC-DC converter losses and heat at high power.

Auxiliary winding sensing and parallel detection circuits enable over-voltage, over-temperature, and reverse current protection in one switching cycle.

Adjusting LLC resonance frequency by load helps display power supplies avoid light-load efficiency loss, audible noise, and bulky magnetics.

Real-time efficiency feedback adjusts switching and input power portions to improve conversion efficiency while limiting harmonics.

Impulse-response sensing in a resonant inductive heater enables precise susceptor temperature control for stable aerosol generation.

A light-load control circuit turns on the freewheeling transistor after long off-times to raise frequency, cut noise, and stabilize output voltage.

Hybrid modulation lowers PFC bus voltage at high AC input to cut DC-DC switching loss, thermal risk, and instability.

An energy management module decouples sub-module capacitor voltages from DC network voltage to keep modular converters stable under disturbances.

Soft switching and triangular current control keep series cell voltages and phases aligned, cutting loss and control wiring in high-voltage conversion.

A resonant inductive heating circuit uses a susceptor and shared heat sink to balance aerosol output, control precision, and transistor cooling.

Equalizing control-path delays shortens dead time in a switched-mode power supply, improving efficiency and linearity for wideband envelope tracking.

Controllable inverter voltages and phase shifts keep wireless power transfer near resonance at fixed frequency, sustaining power and efficiency.

Output capacitor current sensing compensates inductor current error in AVP regulators, reducing voltage offset during dynamic scaling.

Alternating adjacent voltage zones and balancing capacitor charge enables full output range with smaller inductors while preventing switch overstress.

Feedback from resonant-node current sensing balances high-side and low-side duty cycles to improve current transmission and switching efficiency.

A self-driven synchronous rectifier boosts low-voltage harvested power with minimal control overhead and higher DC-DC conversion efficiency.

Two serially connected transformers alternate forward and flyback operation to avoid LLC inductor loss and raise inverter power transfer efficiency.

A common-mode feedback adjustment balances high- and low-side switch duty cycles in an LLC converter to improve load transient response and efficiency.

A soft switching cell enables zero-voltage turn-on and low-current turn-off in a three-level AC power supply circuit to cut switching loss.

Using polarity inversion for negative slope compensation, this bridgeless PFC converter stabilizes peak current control and enables a smaller reactor.

A latched current comparator captures over-current events in high-frequency buck converters, limiting current and reducing voltage spikes.

Inquiry and feedback signals coordinate primary switch turn-on after synchronous rectifier shutoff, preventing common conduction.

A capacitor-threshold control skips PWM pulses at light loads to cut switching loss while maintaining output voltage regulation.

Primary-secondary signal handshaking turns off the synchronous rectifier before primary switch turn-on, preventing cross-conduction.

Multi-level resistance switching with voltage feedback suppresses IGBT oscillation and switching loss across varying power conditions.