Power supply converter with rectification/inversion switching function

Abstract

The present invention relates to a power supply conversion device, which can interchange the functions between rectification and inversaion. The device includes the instruction unit, the bridge type unit and the control unit. The instruction unit provides the rectification instruction and the inversaion instruction. Based on the provided instructions, the output relevant pulse signals control each switch part in the bridge type unit respectively. The control unit realizes the rectification function or the inversion function based on the instruction issued by the instruction unit. Only one device can provide the functions of rectification and inversion. The interchange of the functions can be realized by use of written in different instruction programs or different instruction cards inserted.

Description

technical field

[0001] The invention relates to the field of power supplies of electronic products, and more specifically, relates to a power conversion device with interchangeable rectification / inversion functions. Background technique

[0002] The general UPS provides users with high-quality power through rectification and inverter transformation twice. The usual practice is to first complete the function of converting AC to DC through a rectifier, and then complete the function of converting DC to AC through an inverter. The bridge switching rectifier composed of fully controlled devices is applied to UPS, which can improve the input power factor and reduce the input harmonic current; the bridge inverter technology has also been applied to UPS and frequency converters. In the existing technology, although both the bridge rectifier and the bridge inverter are mature technologies, the current rectification and inverter use different control units, and different rectificati...

Examples

Embodiment Construction

[0023] Such as figure 1 Shown is the structural block diagram of the power conversion device of the present invention, as figure 2 Shown is the situation when this power conversion device is applied to single-phase rectification and inversion, and is mainly composed of a single-phase full-bridge circuit 10 and a control unit 13 . The AC end of the single-phase full-bridge circuit 10 is an AC filter 12 composed of an inductance and a capacitor, which is used to complete the filtering of the AC side; at the DC end of the single-phase full-bridge circuit 10, a capacitor 11 is used as a DC filter. It is used to complete the filtering of the DC side.

[0024] The current detection unit 14 is used to detect the current signal of the AC terminal, plus the AC voltage and the DC bus voltage signal detected by the single-phase AC voltage detection line 15 and the DC bus voltage detection line 16 respectively, and input the control unit 13 together, by its software Operations are perf...

technical field

[0001] The invention relates to the field of power supplies of electronic products, and more specifically, relates to a power conversion device with interchangeable rectification / inversion functions. Background technique

[0002] The general UPS provides users with high-quality power through rectification and inverter transformation twice. The usual practice is to first complete the function of converting AC to DC through a rectifier, and then complete the function of converting DC to AC through an inverter. The bridge switching rectifier composed of fully controlled devices is applied to UPS, which can improve the input power factor and reduce the input harmonic current; the bridge inverter technology has also been applied to UPS and frequency converters. In the existing technology, although both the bridge rectifier and the bridge inverter are mature technologies, the current rectification and inverter use different control units, and different rectificati...

Examples

Embodiment Construction

[0023] Such as figure 1 Shown is the structural block diagram of the power conversion device of the present invention, as figure 2 Shown is the situation when this power conversion device is applied to single-phase rectification and inversion, and is mainly composed of a single-phase full-bridge circuit 10 and a control unit 13 . The AC end of the single-phase full-bridge circuit 10 is an AC filter 12 composed of an inductance and a capacitor, which is used to complete the filtering of the AC side; at the DC end of the single-phase full-bridge circuit 10, a capacitor 11 is used as a DC filter. It is used to complete the filtering of the DC side.

[0024] The current detection unit 14 is used to detect the current signal of the AC terminal, plus the AC voltage and the DC bus voltage signal detected by the single-phase AC voltage detection line 15 and the DC bus voltage detection line 16 respectively, and input the control unit 13 together, by its software Operations are perf...

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