UPS AC parallel control circuit

A control circuit and parallel connection technology, applied in the direction of circuit devices, electrical components, emergency power supply arrangements, etc., can solve problems such as machine failure, chip damage, and stability degradation, and achieve enhanced stability, strong anti-interference ability, and increased anti-interference The effect of the design

Pending Publication Date: 2017-07-18
安徽博微智能电气有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Modular UPSs are required to support hot-swappable technology. When the module is hot-plugged or hot-plugged, there is interference at the moment, which may cause the internal AC parallel control circuit of the module to be damaged due to interference, and it will also interfere with other modules on the bus. , leading to machine failure and decreased stability

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Embodiment Construction

[0012] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0013] Such as figure 1 As shown, in this embodiment, GPIO 1 of the DSP sends a +3.3V high-level signal, and after the voltage level conversion chip U1, outputs a +5.0V high-level signal, which passes through the current limiting resistor R3 and the diode D2 , filter inductors L1, L2, set Signal 01 on the bus to high level, similarly, when GPIO 1 sends low level, Signal 01 on the bus is set to low level, so as to realize sending signals to other modules; when Signal 01 receives When the high level of other modules passes through the filter inductor L2, L1, diode D3, current limiting resistor R4, NAND gate U2_A, an...

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Abstract

The invention discloses a control circuit capable of realizing a UPS AC parallel function. The circuit is formed through combination of seven static switch bus circuits and two CAN bus circuits; UPS AC parallel control is achieved through function implementation of host state signals, inverting voltage phase synchronization, carrier wave synchronization, trigger synchronization, system failure synchronization, AC-to-battery synchronization, battery-to-AC synchronization, data CAN communication and parallel operation CAN communication by all the circuits. The invention has beneficial effects that functions of output synchronization and state synchronization among different modules of a modularized UPS can be realized; at the same time, a two CAN circuit design is provided for data communication among the inner modules of the UPS and external data communication, so that system stability is enhanced; an anti-interference design for the circuit is added, so that the anti-interference capability is improved and the data fidelity and validity are high.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to a design of an AC parallel control circuit for a UPS, in particular to an AC parallel control circuit between modules inside a modularized UPS and an AC parallel control circuit between complete machines. Background technique [0002] At present, a modular UPS is usually composed of a bypass module, a monitoring module, and multiple power modules connected in parallel. The modules are connected in parallel through an AC control circuit to keep the output in the same phase and frequency. The power modules of a modular UPS generally use dual DSP control, respectively controlling the rectifier circuit and inverter circuit, how to reasonably design the AC parallel control circuit, so that real-time communication between modules and fast synchronous response, is a key difficulty in the current modular UPS design; at the same time, the modular UPS internal There ar...

Claims

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Application Information

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IPC IPC(8): H02J9/06
CPCH02J9/061
Inventor 向伟炜胡龙应丁梦亭刘梦菲徐杰陆学军万静龙
Owner 安徽博微智能电气有限公司
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