Ac-Dc Conversion Without Reversal TRIZ Cases

A dual-channel power factor correction control circuit switches between single and two-phase modes to reduce switching losses.

Segmented LED groups and cavity-mounted rectifiers handle high-voltage inputs while maintaining illumination efficiency.

Zero current soft switching eliminates switching losses, enabling efficient high voltage transmission with reduced transformer size and complexity.

Segmented capacitors enable ZCS and ZVS switching to reduce harmonic distortion near AC voltage zero crossings.

A high-frequency transformer-based DC-AC voltage converter system utilizing Ćuk-type and SEPIC converters for electrical isolation.

A PoE power converter detects protocol types via transformer mapping signals instead of optical couplers.

A switch drive circuit uses a transformer secondary coil to control rectification switches in resonant converters.

A power assist unit buffers peak current demands using a storage element and converter to prevent voltage drops during rapid load changes.

A power factor correction circuit determines switch-on timing based on switching voltage to enable valley switching.

Applying gate voltage to reverse biased bipolar switching elements reduces leakage current and conduction loss in power converters.

A clamp circuit redirects excess energy through diodes and inductors to manage voltage spikes.

Active feedback control balances current through parallel TRIACs by adjusting trigger angles, eliminating large inductors that increase power consumption.

A low power RF envelope detector uses a charging transistor and input capacitors to couple charge for signal detection.

Periodic switching of power conversion units distributes wear evenly while reducing energy loss from continuous operation.

Electronic locksets eliminate frequent battery replacements by harvesting continuous power from wireless signals, resolving maintenance bottlenecks.

Transistor-controlled inrush current circuits replace bulky resistors to prevent component overstress and extend capacitor lifetime.

A power converter apparatus uses a single carrier signal for both rectifier and inverter sections to simplify control circuitry.

A latching relay and button sensing circuit disconnect the control unit for zero stand-by power while maintaining state during power failures.

Integrating a line sensing multiplier eliminates external sense terminals by deriving voltage data from internal drive signals, lowering chip cost.

Driving circuit limits gate voltage on low side switches to reduce conductive resistance, minimizing voltage drops and enhancing efficiency at low voltages.

Multi-level rectifier segments medium AC conversion into lower voltage stages to eliminate expensive high-voltage semiconductors.

Resistive elements across converter arms rapidly dissipate inter-arm direct current energy during short circuits, accelerating system recovery.

Electronic device filters unbalancing currents into low and high frequency components to calculate a ratio signal for ground fault detection.

Switched inductor circuits with tightly coupled windings shift between energy storage and transfer modes to optimize power conversion.

Segmented autotransformer windings distribute voltage boosting across multiple legs, reducing weight while maintaining high conversion ratios.

A power supply apparatus uses a control unit to sample AC safety capacitor voltage and trigger discharge circuits only when needed.

A resonant switched-capacitor converter feeds a second buck-boost stage to deliver regulated output voltage.

A unidirectional three-phase rectifier uses pulse-width modulation to achieve high power factor conversion.

A microprocessor-controlled switching power supply synchronizes AC-to-DC conversion with voltage waveform zero crossings to minimize component count.

A control circuit disconnects an input filter capacitor during high voltage surges to protect the switch-mode power supply.

A DC-DC converter uses zero-voltage switching and a capacitive rectifier bridge to supply dual bias voltages for aircraft fan inverters.

A data processing system combines current and next cycle input streams to form frames for efficient dictionary-based compression.

Series-connected diode bridges with specific transformer phase offsets reduce total harmonic distortion below IEEE 519 limits while minimizing component count.

A transistor switches to a diode configuration to source current from a rectifier bridge when load current drops below a threshold.

Primary side controller monitors auxiliary winding voltage to prevent secondary component damage from unregulated over-voltage conditions.

Solid state inverter paired with variable reactors to maintain consistent heating current and frequency.

A broadband gateway uses a comparator to detect AC power loss and send a dying gasp message before DC voltage drops, preventing prolonged connection issues.

A control device limits output torque when a DC voltage converter abnormality coincides with high rotation speeds.

Monitoring drain terminal voltage identifies resonant ringing valleys to eliminate auxiliary winding complexity and reduce electromagnetic interference.

A power harvester uses a saturable transformer core and series resistor to deliver constant electrical energy across varying line currents.

A controller coordinates low impedance paths and switch mode power conversion to stabilize dimming signals.

A relay drive circuit transforms AC voltage to DC using diodes and transistors to control the relay coil directly.

A switching power supply apparatus adjusts threshold signals to maintain constant frequency.

An auxiliary winding pre-charges the DC link capacitor to limit inrush currents, eliminating resistor-based conduction losses during normal operation.

A ripple suppression circuit maintains DC current through an LED load by controlling the difference voltage between input and output signals of a switching converter.

Current source circuits stabilize de-charging amplitudes, resolving poor power factor in thyristor systems.

A virtual capacitor system uses a bi-directional current source to emulate shunt capacitance.

A semiconductor diode integrates a resistance layer on its back surface to provide thermal capacity and stable operation under high pulse loads.