Ac-Dc Conversion Without Reversal TRIZ Cases

Integrated EMI shielding and filtering resolve high dv/dt transitions and electromagnetic interference in motor drives.

A power conversion system stabilizes DC link voltage through coordinated control of AC to DC and step-down chopper circuits.

Electronic control system prevents loop current flow without transformers, reducing device cost while maintaining operational reliability.

Cascaded charge pumps amplify weak input signals using clock signals from a self-powered LC resonant unit.

Segmented parallel secondary windings lower leakage inductance to cut energy loss and overheating in low output voltage converters.

Segmented capacitor networks with distinct capacitance values enable flexible output voltage regulation below twice the input amplitude.

A zero-crossing detection circuit estimates AC signal transitions using a logic unit and diodes.

Integrated power supply circuit merges charging and power factor correction functions using shared inductors and semiconductor switches.

Series resonant circuit suppresses peak rectified voltage and reduces harmonic content in polyphase current supplying circuits.

A controller adjusts DC-to-DC converter current to balance split bus voltages, reducing total harmonic distortion in AC-to-DC power factor correction circuits.

A power factor correction control system stabilizes oscillation using a timer circuit and flip-flop to set switching element off-periods.

Series high-voltage generators enable rapid output voltage adjustments via feedback control.

Switched resistors damp LCL filter resonances during start-up to prevent excessive DC-voltage trips and capacitor degradation.

Controller detects switch voltage valley point using timing calculations to simplify power converter circuit design.

Auxiliary power supply circuit maintains protection voltage during intermittent operation.

A power supply device uses phase shifting to balance output currents across parallel resonant circuits.

Auxiliary winding detects inductor current polarity to enable zero voltage switching, reducing switch loss and simplifying control complexity.

A flexible waveguide transmits RF power to remote sensors and actuators without wires.

A rectifier circuit modulates transistor threshold voltages via dynamic bulk biasing to enhance forward conduction.

Direct current sensing via transformer eliminates resistive losses and reduces component count by integrating control logic with magnetic coupling.

Autotransformer rectifier design stabilizes DC midpoint voltage, eliminating imbalance currents and reducing converter weight.

A power factor correction circuit adjusts switching transistor operation via dynamic voltage level detection and error amplification feedback.

A power converter circuit switches to standby mode when a device detaches, conserving energy through automatic state transitions.

A capacitive power supply uses a dynamic NTC thermistor to limit inrush current while reducing steady-state power dissipation.

A controller switches to modified pre-calculated switching sequences when error values exceed defined bands.

Distributed windings on parallel magnetic core legs reduce leakage inductance.

Digital counters generate phase-shifted switch signals in a unified PFC controller, resolving circuit complexity and accuracy issues in interleaved regulators.

A bias voltage generation circuit regulates output levels using a comparator and pulse width modulation signals to control switch duty cycles.

A smart power adaptor adjusts DC output via charging protocol communication to match device needs.

Microcontroller controls switch circuits to reduce volume and cost while maintaining plasma stability.

Segmented power extraction units maintain stable voltage across varying RF field strengths, preventing tag resets caused by uncontrolled current surges.

A current tripler rectifier topology divides load current across three parallel filter inductors to reduce copper loss and improve power density.

A DC output power converter reverses current in connected loads to drain stored energy into a sink until voltage reaches near zero potential.

Clamped diodes reduce conduction drop by limiting voltage stress to output levels, improving efficiency in isolated power converters.

An adjustment unit delays activation of the current limiting resistor until after capacitor charging, preventing high inrush currents at startup.

A thermally conductive polymer enclosure dissipates heat from electronic switches using integrated heat-dissipating elements.