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Direct-current voltage boost power supply adopting double-tube Buck-Boost circuit

A DC step-up and circuit technology, applied in the direction of converting DC power input to DC power output, electrical components, and adjusting electrical variables, can solve problems such as poor anti-interference ability, poor control effect, and sensitivity to noise in the differential link, and achieve The effect of improving dynamic performance and accelerating energy adjustment rate

Active Publication Date: 2021-01-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of classic PID control is simple, and has the advantages of strong adaptability, simple controller design and low control cost, but the integral and differential links are prone to saturation, the differential link is sensitive to noise, and has poor anti-interference ability, and the dynamic response of PID control is relatively slow. Slow, poor control effect when the load changes frequently

Method used

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  • Direct-current voltage boost power supply adopting double-tube Buck-Boost circuit
  • Direct-current voltage boost power supply adopting double-tube Buck-Boost circuit
  • Direct-current voltage boost power supply adopting double-tube Buck-Boost circuit

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Effect test

Embodiment approach 1

[0049] The main circuit is a standard dual-tube Buck-Boost circuit. The design and selection methods of the power electronic switching devices Q1 and Q2, freewheeling diodes D1 and D2, capacitor C1, and inductor L1 are the same as those of the standard dual-tube Buck-Boost circuit. The device design and selection methods are exactly the same.

[0050] The inductor current detection circuit 1 and the output current detection circuit 2 are designed with reference to a circuit with current detection and information transmission functions, for example, a combination of a Hall current sensor and a signal processing circuit is used.

[0051] The output voltage detection circuit 3 is designed with reference to a circuit having a voltage detection function and an information transmission function, for example, a combination of a Hall voltage sensor and a signal processing circuit is adopted.

[0052] The control current calculation circuit 4 is implemented by a circuit capable of rece...

Embodiment approach 2

[0061] For the case where the amplitude of the power supply voltage on the input side is not constant, an input voltage detection circuit can be added on the input side of the main circuit, which can be designed and implemented by referring to various existing circuits with voltage detection and signal transmission functions. For example, Hall can be used Type voltage sensor and corresponding signal processing circuit. Connect the output of the input voltage detection circuit to the corresponding input terminals of the control current calculation circuit 4, Q2 off-time calculation circuit 6, energy calculation circuit 7, Q2 drive circuit 8 and other circuits, and other circuit designs are consistent with the implementation method 1.

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Abstract

The invention provides a direct-current voltage boost power supply adopting a double-tube Buck-Boost circuit. According to the invention, a main circuit comprises two power electronic switching devices Q1 and Q2, an inductor L1, a capacitor C1 and two fly-wheel diodes D1 and D2; a connection mode is the same as a connection mode of devices in a standard double-tube Buck-Boost circuit; an input side is used for being connected with an external power supply, and an output side is used for being connected with an external load; and a control circuit comprises an inductive current detection circuit, an output current detection circuit, an output voltage detection circuit, a control current calculation circuit, a load identification circuit, a Q2 turn-off time calculation circuit, an energy calculation circuit, a Q2 drive circuit, a Q1 turn-off time calculation circuit, an output power detection circuit and a Q1 drive circuit. According to the direct-current voltage boost power supply provided by the invention, through analyzing and calculating the energy of each part in the double-tube Buck-Boost circuit, the control of the power electronic switching devices in the double-tube Buck-Boost circuit is realized, the energy regulation rate in the main circuit is accelerated, and the dynamic performance of the power supply is further improved.

Description

technical field [0001] The present invention relates to the DC step-up power supply technology using a double-tube Buck-Boost circuit, in particular to a DC step-up power supply using a double-tube Buck-Boost circuit, which is a power electronic switch based on the energy relationship in the circuit as a criterion. Device-controlled DC boost power supply control circuit technology. Background technique [0002] The dual-tube Buck-Boost circuit is widely used in DC power supplies due to its advantages such as small voltage stress of the switch tube, same polarity of input voltage and output voltage, realization of buck-boost control, and high power density. In the dual-tube Buck-Boost circuit, PID control is one of the most widely used control methods with high technical maturity. The principle of classic PID control is simple, and has the advantages of strong adaptability, simple controller design and low control cost, but the integral and differential links are prone to sa...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/1582
Inventor 张强魏家植尹延冰焦海朝吴林海李梦滢年强李鸿凯王禹霖宋世豪
Owner HARBIN ENG UNIV