Voltage oriented energy bidirectional flowing rectifier control device

Abstract

The invention discloses a voltage oriented energy bidirectional flowing rectifier control device which is characterized by comprising a phase detection module, a voltage detection module, a current detection module, a current coordinate conversion module, a voltage loop digital PI adjuster, a current loop comparer, a voltage loop comparer, a current loop digital PI adjuster, a calculation adjustment module, a voltage coordinate conversion module and a SVPWM module. The control of side current is converted into the control of direct current components of the current vector on a d axis and a q axis through a voltage vector orientation method to achieve sinusoidal input current waveform and homophase or reversed phase of input current phase and voltage phase and realize the energy bidirectional flowing of unity power factor. The rectifier device replaces the uncontrollable rectifier part in the traditional AC-DC-AC frequency converter, not only overcomes the defects of the traditional power supply but also has the advantages of sinusoidal current, side power factor approximate to one, faster dynamic response, easy modulization, electric energy two-way transmission and the like.

Description

technical field [0001] The invention relates to a rectification control device, in particular to a rectification control device with bidirectional flow of voltage-oriented energy. Background technique [0002] With the development of power electronics technology, the performance of power semiconductor switching devices has been continuously improved, which has promoted the rapid development of power electronic converter technology, and various converter devices based on pulse width modulation (PWM) control have appeared, such as inverters. , inverter power supply, high-frequency switching power supply and various special converters, etc. These converter devices are widely used in various fields of the national economy. At present, a large part of these converters need a rectification link to obtain DC voltage. Since the conventional rectification link widely uses diode uncontrolled rectification circuits or thyristor phase-controlled rectification circuits, a large number of...

AI Technical Summary

Problems solved by technology

Every time the motor brakes, the motor is actually working in the state of power generation, which causes the DC voltage of the bus to rise. The usual practice is to connect a release resistor across the DC bus to release the excess energy through heat, which will inevitably cause energy loss. waste

[0003] At present, the mainstream way to control the rectifier is to use DSP and MCU technology plus software. The advantage of this method is that it is more flexible and can realize complex algorithms. The more resources occupied by the CPU, the more CPU resources are occupied, which reduces the overall performance of the system; in addition, there are also problems with the versatility of the software method, because the instruction systems of products of different manufacturers are also different, which makes the software codes developed by users generally unable to be reused.

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