Santak Electronic (shenzhen) Co., Ltd.

Huahong Ning

Dawei Zheng

Dengke Zhang

Dan Liu

Lei Cao

Hualiang Li

Pingchang Lin

Qinghui Ding

A stable control system for a three-phase rectification controller circuit is provided. The stable control system filters voltage harmonics and performs attenuation feedback compensation on current harmonics to enable a rectification circuit to achieve high stability and low THDi, while performing filtering on a direct current bus voltage in the case of an unbalanced load, so as to filter out voltage harmonics and enable the circuit to support the unbalanced load. A stable control system for an interleaved direct current booster circuit is also provided. The stable control system equalizes inter-leg currents such that a battery has good dynamic effects and good current equalization performance.

Stable control systems and methods employing one-way rectification and interleaved booster

A multi-input power converter includes three bridge arm units connected between a three-phase AC power supply and a positive/negative DC bus. First and second capacitors are connected in series between the positive and negative DC buses with a node connected to a neutral point. Each bridge arm unit includes an inductor and a bidirectional switch unit connected in series with a node connected to a current direction control bridge arm between the positive and negative DC buses. Second ends of bidirectional switch units are connected to the neutral point. In a battery mode, two of the bridge arm units are as battery mounting bridge arms to constitute a DC loop with a rechargeable battery to supply power to the positive and negative DC buses, and the remaining bridge arm unit enables an inductor thereon to alternately connect the positive and negative DC buses to balance a bus capacitance voltage.

Multi-input power converter and online uninterruptible power supply including multi-input power converter

Carrier signal generators are provided. The carrier signal generator includes a master processing module and a plurality of slave processing modules. Each slave processing module is used to control a corresponding one of universal power units of the UPS. The slave processing modules output, according to a synchronously received reference signal, control signals to control the universal power units to receive power from the mains or a rechargeable battery. When the mains is normal, each slave processing module synchronously generates a three-phase rectification control signal to rectify and output power from the mains. When the mains is abnormal, each slave processing module generates a first DC-DC control signal independently of the reference signal output by the master processing module, so as to convert and output power from the rechargeable battery. The carrier signal generator has improved compatibility and improved current conversion quality and is low cost.

Carrier signal generator and uninterruptible power supply comprising same

A control system for a three-phase inverter includes an instantaneous value voltage controller and an equivalent effective value voltage controller. The instantaneous value voltage controller is configured to feed back and control an instantaneous value of an inverter output voltage. The equivalenteffective value voltage controller is configured to perform an orthogonal decomposition feedback control on an effective value of the inverter output voltage. The equivalent effective value voltage controller is configured to perform integral compensation respectively on a real-axis voltage and an imaginary-axis voltage of a two-phase rotating coordinate system of the three-phase inverter. An output of the instantaneous valuevoltage controller and an output of the equivalent effective value voltage controller are used to obtain the inverter output voltage through a delay stage transfer function and a controlled object transfer function.

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Shenzhen, China

Huahong Ning