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A three-phase broadband AC input adaptive synchronous rectification circuit and control method

A technology of AC input and synchronous rectification, which is applied in the direction of converting AC power input to DC power output, electrical components, and high-efficiency power electronics conversion. High efficiency and strong anti-interference effect

Active Publication Date: 2021-04-13
天津锐微科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

In addition, the more advanced control is to use the voltage model for vector following control. Although it can greatly improve the conversion efficiency, the algorithm is more complicated, and if there are harmonics on the power input side, the conversion control will become disordered and unstable.

Method used

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  • A three-phase broadband AC input adaptive synchronous rectification circuit and control method
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  • A three-phase broadband AC input adaptive synchronous rectification circuit and control method

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, the three-phase broadband AC input adaptive synchronous rectification circuit of the present invention includes a generator three-phase AC power supply GA, a current detection circuit, a three-phase rectification circuit, a DC stabilized voltage output circuit and a voltage detection circuit connected in sequence. The current detection circuit detects the value of the input three-phase AC power, samples and compares the three-phase current output by the three-phase AC power supply GA of the generator, or sends the sampled value to the processor MCU, and pulses according to the obtained comparison signal or sampled value Logic control of signal PWM output. The voltage detection circuit is used to detect the voltage value of the output DC part, compare or sample the output voltage with the set voltage value and directly send it to the p...

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Abstract

The invention discloses a three-phase broadband AC input self-adaptive synchronous rectification circuit and a control method. It is connected with a three-phase rectification circuit and a DC regulated output circuit; a three-phase rectification; a filter; and a DC regulated output. The present invention uses a current sensor or other methods to obtain the current value and set its corresponding threshold value to control the opening and closing of the corresponding field effect tube, and then realizes the power conversion of the broadband three-phase AC input, so that the power conversion rectifier circuit is in the three-phase input It can still work normally in the case of frequency conversion, and the circuit is simple and easy to control, so that the rectifier circuit has the characteristics of simple control, high conversion efficiency, low heat generation, and self-adaptation, and is suitable for high-speed generator power conversion circuits.

Description

technical field [0001] The invention relates to a broadband adaptive synchronous rectification circuit and a control strategy, more specifically, to a three-phase broadband AC input adaptive synchronous rectification circuit and a control method. Background technique [0002] With the development of power electronics, the volume and weight requirements of some electronic equipment such as aeronautical generators are becoming lighter and lighter, and the required output power is also increasing. Traditional power electronic conversion circuits generally use diodes for rectification and conversion. Due to the voltage drop characteristics of the diode itself, the conversion efficiency is low and the heat generation is large. Especially in the case of high-frequency three-phase AC input, low voltage and high current, the traditional conversion circuit is even more uncontrollable. The general solution is to use a field effect transistor (MOSFET) to replace the diode for rectific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219
CPCH02M7/219H02M7/2195Y02B70/10
Inventor 刘成杨常伟
Owner 天津锐微科技有限公司
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