Ac-Dc Conversion TRIZ Cases

Reactive power averaging lets parallel converters balance load and hold AC voltage amplitude without a master, avoiding drift and single-point failure.

Superposed dispersion current enables low-cost ADC error correction and higher effective resolution without external noise hardware.

Current-directed PWM switching in a bidirectional charger IC prevents over-current during wired and wireless charging mode transitions.

By detecting grid state and adjusting switching transistors, the inverter limits inductor current during voltage recovery to avoid element damage.

Monitors transistor drain-source voltages to track AC zero crossings, keeping AC-DC conversion and power factor correction running without grid sensing.

Alternating control-signal frequencies across inverter arms cuts switching power loss and temperature, helping extend converter component life.

Bypassing a faulty converter level after capacitor discharge and modulation adaptation keeps a flying capacitor converter operating after switch failure.

A diode-bridge and interconnect-switching topology cuts active switches and gate drivers in multilevel converters while preserving power quality.

Differentiated gate-voltage sensing and comparator control adjust switching transitions to cut power semiconductor switching loss.

Advance command transmission lets module controllers act within each PWM period, cutting bus speed demands while preserving duty cycle resolution.

Bootstrap capacitors and floating charge circuits power LS/D stages at startup, reducing loss and stabilizing multi-level converters.

Divided phase PWM decouples pulse output from the current-control cycle, enabling radio-frequency inverter switching with lower motor iron loss.

A diode-capacitor inverter topology delivers sinusoidal output without passive filters, cutting overshoot, harmonics, EMI, and motor stress.

A P-shield around the trench gate edge and epitaxial re-growth control channel length while easing field concentration during fast switching.

Per-node delay compensation keeps converter clocks aligned when time references travel over multiple redundant communication paths.

Modular battery units stack and synchronize AC output to deliver scalable temporary power while fitting through standard doorways.

Voltage and current sensing let one converter interface identify PV or storage input and switch DC-DC modes to cut hardware complexity.

Phase-current prediction corrects inverter switching to cancel phase-voltage changes, suppress neutral-point fluctuation, and cut common-mode noise.

A half-bridge converter uses auxiliary bypass switching to maintain ZVS at fixed frequency while lowering switching loss, dv/dt, and filter size.

Snubber voltage feedback adjusts individual switch drive signals to equalize series HV switch voltage and prevent overvoltage stress.

A screw-detachable microinverter with panel-level MPPT eases replacement and limits shading-related power loss in photovoltaic arrays.

By making the semiconductor element self-heat under controlled conduction, this case estimates heat resistance accurately without extra heating power.

Separating zero-phase voltage into AC and DC components detects insulation deterioration early while avoiding overcurrent false positives.

Dynamic switching between two supply voltages lowers inverter flow-through current while preserving input signal transmission.

Separate insulated control paths let the secondary circuit distinguish ASC from normal mode and drive the semiconductor element correctly.

Turning off the second switch before stop periods lets a Class E inverter avoid transition overvoltage and protect the main switching element.

Gate current mirrors shorten switch overlap in current source converters, reducing THD, losses, and heat while preserving current continuity.

A shared DC-link converter powers both the engine motor and thrust reverser, cutting aircraft electrical system weight and complexity.

Harmonic-based charge shaping tunes EV charging and regenerative power to lower battery impedance, cut damage, and speed charging.

DC-side current sensing detects circulating current in parallel power converters with fewer sensors, reducing complexity and cost.

A current concentrating segment redirects snubber current through fewer trench capacitors to raise Ohmic losses and suppress switching ringing.

Calculated phase or neutral control admittance keeps neutral point voltage at target levels, improving earth-fault detection and limiting over-voltage risk.

Model-based inverter compensation corrects high-frequency phase and amplitude shifts to keep output voltage closer to the command.

Frequency decomposition and feedback control cancel unwanted current components in grid-interactive inverters to cut harmonics and improve reliability.

One integrated controller reprograms a buck converter for two- or three-level operation while reducing separate control hardware and complexity.

Independent voltage converters let each PV zone track its maximum power point, cutting current mismatch, thermal losses, and output loss.

Correction-voltage and circulating-current control help MMC converters suppress overcurrent and stay online during grid voltage imbalance.

Repeated cell switching controls current and capacitor voltage to safely dissipate stored converter energy during maintenance.

PWM edge timing shifts balance flying capacitor voltages in multilevel converters, cutting voltage stress and subharmonic oscillations.

Magnetically coupled filter chokes split inverter current across parallel paths, cutting relay contact load, weight, and cost.

A damping circuit across converter switches cuts voltage overshoot, ringing, EMC emissions, and snubber power loss in induction hobs.

Measured converter and transformer signals during commissioning reveal leakage impedance, improving short-circuit current estimation and protection reliability.

Selective phase blocking lets a three-phase bridge converter ride through overloads and grid voltage errors without oversized IGBT switches.

Temperature-based current distribution across converter phases minimizes switch temperature deviation without enlarging heat dissipation area.

A PR controller with a neutral leg suppresses unbalanced and generator harmonics to keep inverter voltage and power stable under irregular loads.

Protects multilevel converters from voltage spikes and startup in-rush by using only two high-voltage FETs and low-voltage switches for most stages.

A configurable converter array replaces separate inverters and DC/DC stages, simplifying PV, storage, and grid expansion while improving efficiency.

Asymmetrical block or trapezoidal voltage control improves heat conversion in a modular brake actuator while adapting to varying intermediate circuit voltage.

Phase-shifted AC voltage across parallel brake branches converts electrical energy to heat without DC drift, supporting stable long-term braking.

Variable modulation frequency matched to partial load improves heat dissipation control and stabilizes modular brake actuator operation.