Ac-Dc Conversion TRIZ Cases
- Wireless Secondary Control for Parallel Inverter Frequency Stability
A wireless secondary control method dynamically adjusts inverter droop bias using local AC signal extraction to synchronize output voltage and frequency.
- UPS Inverter Current Polarity Control for Harmonic Reduction
Controller switches inverter between conduction modes based on load threshold, reducing harmonic distortion and power losses at lower loads.
- Interleaved Inverter Circuitry for Welding Power Supply Short Circuit Control
Segmenting interleaved inverter circuitry reduces output ripple frequency and current, limiting heat delivery to the workpiece during short circuit events.
- NPC Inverter Overmodulation Midpoint Potential Regulation
A control module decomposes voltage vectors in a hexagonal space to regulate the midpoint potential of an NPC inverter.
- Bidirectional Inverter Circuit for IO-Link Master-Slave Compatibility
AB class transistor circuit with current mirrors interfaces signals between master and slave devices.
- Power Converter Short-Circuit Detection During Start-Up
Extending voltage pulse duration beyond a threshold enables short-circuit detection between output phases without damaging IGBT modules.
- Inverter Gate Voltage Clamping with Delayed Latch Circuit
Delayed Zener clamping via a latch circuit prevents gate voltage oscillations and reduces short-circuit energy in inverter drive systems.
- Inverter Circuit Voltage Clamping for Low-Voltage Oxide MOSFETs
An inverter circuit clamps control voltages to protect low-voltage oxide transistors from excessive stress.
- Current Control Type Converter Startup Voltage Overshoot Prevention
A current control type converter uses proportional-plus-integral controllers to regulate active and reactive currents during operation.
- Three-Level Power Conversion Device Current Redistribution
A second bidirectional switch in a three-level power conversion device redistributes currents to maintain stable operation under unbalanced single-phase loads.
- Common-Mode Current Cancellation via Variable Capacitor Network
A variable capacitor diode network produces cancellation signals that reduce common-mode current interference without increasing transformer complexity.
- Injection Molding Converter DC Link Voltage Control
A power supply converter synchronizes with the phase to generate regenerative energy and adjusts DC link voltage.
- Fully Variable Power Supply Controller for Dynamic Load Adaptation
A fully variable controller adjusts voltage and current outputs to match diverse electrical load requirements.
- Charge Pump Booster Circuit With Variable Capacitance Paths
A charge pump booster circuit uses multiple paths with distinct capacitor counts to boost output voltage.
- Modular Multi-Level Converter Sub-Module With Bidirectional Switching
A modular multi-level converter sub-module uses a bidirectionally switchable device to handle peak currents and generate negative voltage levels.
- Multi-Level Inverter Control for DC Link Voltage Asymmetry
Real-time DC link voltage monitoring adjusts PWM duty cycles to eliminate output asymmetry and harmonic distortion caused by capacitance mismatches.
- Capacitor Voltage Converter with Compensation Circuit
A capacitor-based voltage converter uses a compensation circuit to balance voltages across series-connected capacitors.
- Bootstrap Circuit Reduces Isolated Power Sources in Bidirectional Converters
Bootstrap circuits drive eight switches with two isolated power sources, reducing device complexity while preventing voltage-induced breakdowns.