Ac-Dc Conversion Without Reversal TRIZ Cases

Centralizing AC/DC conversion in a power hub cuts converter losses and simplifies low-voltage cabling for building DC loads.

Thyristor startup timing based on input-voltage amplitude suppresses inrush current while avoiding bulky relays and complex phase calculations.

A tuned resonant frequency ratio keeps Class-E rectifier input reactance stable as dc load changes, avoiding extra regulation circuitry.

A selector switches between AC and DC regulation to stabilize generator voltage and limit HVDC overshoot during no-load and load transients.

Direct series coupling of a human-body antenna and rectifier captures radio waves and quasi-electrostatic fields without a matching circuit.

Dynamic overcurrent protection is enabled only after firing time, preventing false triggering in forward phase-control dimming of LED loads.

Real-time fuel and load analysis sheds noncritical facility loads to extend generator runtime during power outages.

Modular switching and regulating stages raise voltage conversion ratio without adding excessive capacitors and switches, improving efficiency.

Multiple output terminals on a Cockcroft-Walton circuit generate different DC potentials from one AC supply, cutting circuit size and complexity.

Voltage and current feedback trim gate pulse width in a quasi-resonant converter to protect the IGBT while sustaining high power output.

Drain-voltage sensing with filtered comparator control turns off the MOSFET before spikes, improving converter efficiency and protection.

A single-piece housing with five bus bar channels improves dielectric clearance, cooling flow, and high-speed connection stability.

LED arrays and photovoltaic cells replace bulky electromagnetic parts to step down AC into compact, cost-effective DC power.

A three-terminal power supply lets the controller run below input voltage, expanding buck converter input and output range with simpler circuitry.

By keeping the DC-bus capacitor uncharged during OFF intervals, this control approach avoids hard-switching, ticking noise, and excess losses.

A state-machine fan controller cuts fan runtime during non-arc periods, reducing noise, dust intake, and fan wear while maintaining cooling.

A dual rectifier and switch-control layout handles different AC inputs on one board, cutting circuit complexity, volume, and hardware cost.

By multiplexing switches, diodes, and resistors, this circuit suppresses startup surge, handles overvoltage, and stabilizes bus capacitor voltage.

A protective capacitor in a power adaptor supplies startup surge current, reducing breaker trips in high-power corded tools.

Quasi-two-level switching cuts neutral-point current in a DNPC PFC circuit, reducing voltage fluctuation, capacitor size, and conduction loss.

Split inductors and bypass diodes suppress negative surge current in a totem-pole bridgeless PFC converter, reducing switch stress.

Staged submodule charging, discharging, and bypass control limits capacitor overcharging and sudden current surges in HVDC converters.

A delayed ripple signal is extracted and subtracted in the control loop to stabilize AC-DC output voltage without larger capacitors.

Two resonant circuits decouple output current control from switching frequency, cutting RFI noise, losses, and control complexity.

Placing a fiber body in the coolant flow path boosts circuit cooling through turbulence and also helps capture contamination.

Interchangeable converter modules let T/RIMM arrays convert AC prime power to staged DC and adapt power distribution without disconnecting power.

Anode-gate thyristors and a charge-pump control stage remove optocoupler isolation from rectifier bridges, cutting circuit cost and complexity.

Voltage detection and amplified voltage injection cancel high-frequency leakage currents without phase inversion, resonance, or added circuit complexity.

Using a sigmoid gate-drive cross voltage, a HEMT rectifier circuit cuts circulation and switching losses while preserving diode-like rectification.

A rear-side opening and local p-type region let GaN HEMTs discharge impact-ionization holes without adding capacitance or hurting RF performance.

Gate timing overlap compensates transformer leakage inductance, cutting body diode conduction losses and improving full-bridge rectifier reliability.

State-dependent bias control suppresses OFF-state regulator leakage without raising ON-state loss in mobile power amplifier circuits.

Zero-cross sensing and digital sine reference generation align converter switching with input voltage to improve power factor and cut THD.

A switched resistor path detects high voltages accurately while limiting waveform rounding and timing delay in switching power supplies.

Drain-source voltage sensing with a dynamic threshold blocks false SR MOSFET turn-ons from noise and oscillation, improving converter efficiency and EMI.

Closed-loop DSP and PWM control regulate digital power supply output under changing loads while improving power factor correction.

Threshold-based SMPS switching powers controller functions only when needed, cutting standby losses in connected direct mains LED drivers.

A controller interrupts UPS bypass current for timed intervals, balancing RMS load sharing without chokes or cable adjustments.

Series resistors form a measurement point on transformer secondary windings, eliminating complex substrate routing and reducing electrical assembly complexity.

A passive power factor correction circuit uses segmented filtering to reduce component size while maintaining high efficiency.

Variable phase alignment between converter and inverter carrier waves minimizes circulating current and wiring heat generation across multiple power feed modes.

A turbo charger generator control unit maintains target DC current values to stabilize output power and voltage.

A digital control device adjusts switch timing in a switching power supply to reduce total harmonic distortion and improve power factor.

Dual voltage comparators control transistor switching states in a rectifier circuit, minimizing reverse-flow currents and improving power conversion efficiency.

Merging the auxiliary power supply into the main inverter reduces system complexity and space consumption while maintaining high power density.

A primary-side conversion circuit transforms analog input signals into pulse width modulation pulses transmitted to a secondary microcontroller.

A control unit generates a driving signal to limit inductor peak current and reduce magnetic component volume.

A power factor correction circuit generates a reference signal by sensing input voltage to align frequency and phase.

Segmented high-side and low-side current paths enable 360 W delivery while a current monitor injects additional current to prevent overcurrent damage.

Slope compensation units generate signals from alternating-current voltage to adjust inductor current, reducing waveform distortion and processing load.