Industrial Technology Research Institute

Ming-Hung Yu

Po-Li Chen

Pao-Chuan Lin

Kuan-Wen Chen

Yung-Fu Huang

Min-Ju Hsieh

Wan-Pei Chen

Chau-Chun Wen

The application discloses a power conversion system (PCS) parallel architecture and a synchronous control method. Among a plurality of corresponding PCS controllers of the PCS parallel architecture, when a target PCS controller is the first to issue a synchronization signal on a synchronization signal bus, the target PCS controller obtains control authority, the synchronization signal issued by the target PCS controller is taken as a system synchronization signal, and other PCS controllers that did not obtain control authority refer to the system synchronization signal for synchronizing with the system synchronization signal.

Power conversion system (PCS) parallel architecture and synchronization control method thereof

A protection circuit applied to a convertor including M pieces of driving switch modules each coupled to a power source, a load and one of M sets of driving signals. The ith driving switch module is controlled by the ith set of driving signals to selectively enable current paths between the power source and the load. A first sub protection circuit in the protection circuit includes a first protection switch module and a first detection module coupled to the first protection switch module. When the ith set of driving signals indicates an error event, the first protection switch module selectively couples the ith set of driving signals to a reference voltage according to a first detection signal. M and i are positive integers, and i is not larger than M.

Protection circuit

A control method for an energy voltage regulator includes: detecting an output AC signal of a current cycle to generate a reference current command; comparing the reference current command with a reference upper power limit; and if the reference current command is lower than the reference upper power limit, generating a first current command based on the reference current command, to perform a discontinuous conduct control and to operate the energy voltage regulator under a discontinuous conduct state.

Energy voltage regulator and control method applicable thereto

A control method for a DC to AC converter, selectively operating in a continuous conduction mode and a discontinuous conduction mode is disclosed. In the discontinuous conduction mode, the DC to AC converter outputs a first output signal having a first work frequency according to a power value of an input signal. The first work frequency relates to a plurality of first cycles. A first transition period and a first standby period in each first cycle have a first time ratio therebetween. Determine a power value of the first output signal produced during the first transition period. When the power value of the first output signal increases, the first work frequency is increased. When the power value of the first output signal decreases, the first work frequency is decreased.

Control method for DC to AC converter

An output power adjusting method is applied on an inverter. The inverter includes a capacitor to store direct current (DC) electricity provided by a photovoltaic (PV) module. At least the DC electricity provided by the PV module is converted into alternating current (AC) electricity. Determine whether a power value of the AC electricity exceeds a power threshold. When the AC electricity exceeds the power threshold, the inverter works in a continuous mode. When the AC electricity does not exceed the power threshold, the inverter works in a discontinuous mode where the PV module charges the capacitor. In the discontinuous mode, determine whether a voltage on the capacitor exceeds a reference voltage, and when the voltage on the capacitor exceeds the reference voltage, the DC electricity provided by the PV module and DC electricity in pulses provided by the capacitor are converted to the AC electricity.

Output power adjusting method for inverter

A DC-to-AC power conversion method is provided, including: generating an AC reference signal and an AC zero crossing detection signal; generating an error signal based on the AC reference signal and an output current or an output voltage at an AC output terminal; generating a turn-off signal based on the error signal and an input current at a DC input terminal; detecting or predicting a valley voltage of a resonance voltage to generate a turn-on signal; generating first, second, third and fourth switching signals based on the AC zero crossing detection signal, the turn-off signal and the turn-on signal; and controlling first, second, third and fourth switching elements of power conversion modules with the first, second, third and fourth switching signals, to enable the first and second power conversion modules to convert the input current of the DC input terminal to the output current of the AC output terminal.

DC to AC power conversion with resonance valley detection

A DC-DC converter includes a power conversion circuit for converting a DC input voltage to a DC output voltage; and an active clamp circuit for soft switching a first active switching element of the power conversion circuit and recovering leakage inductance energy of a main transformer of the power conversion circuit. As such, the present disclosure provides a DC-DC converter that reduces the switching loss of the switching elements and effectively recovers the leakage inductance energy, thus increasing the conversion efficiency of the converter.

DC-DC converter with active clamp circuit for soft switching

A method for operating the DC-to-DC voltage regulator including plural active switches and plural inductors is disclosed. The method including the steps of: turning on the first active switch, and then turning off the first active switch when the current flowing in the first inductor is equal to zero; turning on the third active switch, and then turning off the third active switch when the current flowing in the second inductor is equal to zero; turning on the second active switch, and then turning off the second active switch when the current flowing in the first inductor is equal to zero; and turning on the fourth active switch, and then turning off the fourth active switch when the current flowing in the second inductor is equal to zero.

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Miaoli, Taiwan

Ming-Hung Yu