Ac-Dc Conversion TRIZ Cases
- Reversible DC-DC Converter Thermal Management via Insulated Metal Substrate
A reversible DC-DC power converter uses an insulated metal substrate to mount semiconductor switches and passive components for efficient heat dissipation.
- Virtual Capacitance in Modular Multi-Level Converters
A modular multi-level converter uses virtual capacitance to regulate internal energy and stabilize DC network voltage.
- Hysteretic Pulse Modulation for Multi-Level Converter Charge Balance
Independent hysteretic comparators regulate flying capacitor voltage without disturbing the output regulation loop, resolving stability and speed trade-offs.
- Power Conversion Module Frequency Control for THD Reduction
Offsetting operating frequencies of parallel power conversion modules reduces total harmonic distortion, minimizing size and cost of harmonic reduction devices.
- Inverter Circuit Startup Loss Reduction via Mode Switching
An inverter circuit reduces switching losses during startup by synchronizing output voltage with the AC power source.
- Adaptive Dead Time Control for Half-Bridge Power Converters
A controller modifies dead time intervals in half-bridge circuits to optimize switching transitions.
- DC Breaker Switch Regulates Link Voltage in Power Supplies
A DC breaker switch circuit regulates the link voltage between power supply stages.
- Three-Level Inverter Switching Branch Voltage Spike Suppression
A three-level inverter switching branch uses dedicated commutation paths to manage current flow within upper and lower halves.
- Power Converter State Detection via DC Link Voltage Sampling
Detect line voltages and currents using DC link voltage sampling synchronized with switching element conduction patterns.
- Modular Multilevel Converter Control Using Observer for Disturbance Compensation
An observation unit models a modular multilevel converter to calculate undisturbed actual state values from control voltage inputs.
- Pulse Driving System Reducing Optical Fibers in Multi-Level Converters
A pulse driving system uses a single optical fiber to transmit encoding information between control modules.
- Single Microprocessor Inverter Control with Dual Estimation Safety Logic
A single microprocessor inverter control unit compares electronic and software speed estimates to inhibit the power converter.
- Voltage Rail Generation Circuit Using Single Flying Capacitor
A voltage rail generation circuit uses a single flying capacitor and multiple switches to produce intermediate reference voltages.
- MMC Power Conversion Device Independent AC and Capacitor Voltage Control
A modular multi-level converter device segments control functions to independently regulate AC output and capacitor voltage.
- Three-Level Buck Regulator Parasitic Resistance Reduction
A three-level buck regulator circuit uses additional switches to minimize parasitic resistance in cascoded configurations.
- Switching Element Drive Unit with Dynamic Threshold for Excess Current
A drive unit adjusts detection thresholds based on collector-emitter voltage to promptly identify excess current flow in switching elements.
- DC/DC Converter Duty Control Optimization for Power Loss Reduction
A control apparatus adjusts DC voltage targets to optimize duty ratios in semiconductor switching devices within a power conversion circuit.
- Power Converter Switching Control via Voltage Synchronization
A power converter uses a detection circuit to synchronize input and supply voltages before enabling the switching device.