阅读说明：本技术 一种大功率变频可调开关电源系统及其控制方法 (High-power variable-frequency adjustable switching power supply system and control method thereof ) 是由 刘吉虎 于 2020-06-24 设计创作，主要内容包括：本发明公开一种大功率变频可调开关电源系统,其特征在于,包括：单片机、时序控制模块、电源软启动模块、过流保护模块、脉宽调制及控制模块、反馈补偿模块、驱动逆变与保护模块和输出端,所述单片机依次连接所述时序控制模块、电源软启动模块、过流保护模块、脉宽调制及控制模块和反馈补偿模块,所述脉宽调制及控制模块连接所述单片机,所述脉宽调制及控制模块和电源软启动模块分别连接所述驱动逆变与保护模块,所述驱动逆变与保护模块连接所述输出端,所述输出端连接所述反馈补偿模块。采用高性能的绝缘栅双极型功率晶体IGBT作开关逆变元件、采用变频调幅技术研制的逆变电源,具有效率高、性能可靠、体积小等优点。(The invention discloses a high-power variable-frequency adjustable switching power supply system, which is characterized by comprising the following components: the pulse width modulation and control module is connected with the single chip microcomputer, the pulse width modulation and control module and the power supply soft start module are respectively connected with the driving inversion and protection module, the driving inversion and protection module is connected with the output end, and the output end is connected with the feedback compensation module. The inverter power supply which is developed by adopting the high-performance insulated gate bipolar power crystal IGBT as a switching inverter element and adopting the frequency conversion and amplitude modulation technology has the advantages of high efficiency, reliable performance, small volume and the like.)

1. A high-power variable-frequency adjustable switching power supply system is characterized by comprising: the pulse width modulation and control module is connected with the single chip microcomputer, the pulse width modulation and control module and the power supply soft start module are respectively connected with the driving inversion and protection module, the driving inversion and protection module is connected with the output end, and the output end is connected with the feedback compensation module.

2. The high-power variable-frequency adjustable switching power supply system according to claim 1, wherein the single chip microcomputer is an SOC196 single chip microcomputer.

3. The high power variable frequency switching power supply system according to claim 1, wherein the timing control module is an HF8/PSC801B timing power supply controller.

4. The high-power variable-frequency adjustable switching power supply system according to claim 1, wherein the overcurrent protection module is a large-capacity filter capacitor.

5. The high-power variable-frequency adjustable switching power supply system according to claim 1, wherein the driving inversion and protection module uses an insulated gate bipolar power transistor IGBT as a switching inversion element.

6. The control method of the high-power variable-frequency adjustable switching power supply system according to claim 1, characterized by comprising the following steps:

s1, the SOC196 singlechip sends out digital signals;

s2, the timing control module controls the power supply soft start module to be slowly electrified;

s3, the overcurrent protection module carries out overcurrent protection on the power supply soft start module;

s4, modulating the sine wave by the pulse width modulation and control module to obtain a sine pulse width modulation wave;

s5, driving an inversion element IGBT by a driving inversion and protection module to change the frequency of the sine wave, so that the amplitude reaches the frequency modulation and amplitude modulation output, the inversion output is a series resonance type output, and the high-frequency carrier signal is filtered to obtain the sine signal with the required frequency.

Technical Field

The invention belongs to the technical field of power switches, and particularly relates to a high-power variable-frequency adjustable switching power supply system and a control method thereof.

Background

The application of the sine pulse width modulation and variable frequency speed control technology in the field of industrial control is wide day by day. Many electrical test instruments require high power and high performance to meet the test requirements of electrical equipment. At present, most of core power devices of a high-power switching power supply in the market adopt MOSFET semiconductor field effect transistors and bipolar power transistors, and the requirements of small size, high frequency and high efficiency cannot be met.

The bipolar power transistor can meet the requirement of high withstand voltage and heavy current, but has no quick switching speed, belongs to a current control type device and needs larger power for driving.

Disclosure of Invention

The invention aims to overcome the defect that a MOSFET semiconductor field effect transistor and a bipolar power transistor in the prior art cannot meet the requirements of small size, high frequency and high efficiency, and provides a high-power variable-frequency adjustable switching power supply system.

The invention discloses a high-power variable-frequency adjustable switching power supply system, which comprises: the pulse width modulation and control module is connected with the single chip microcomputer, the pulse width modulation and control module and the power supply soft start module are respectively connected with the driving inversion and protection module, the driving inversion and protection module is connected with the output end, and the output end is connected with the feedback compensation module.

Further, the air conditioner is provided with a fan,

the single chip microcomputer is an SOC196 single chip microcomputer.

Further, the air conditioner is provided with a fan,

the timing control module is an HF8/PSC801B timing power controller.

Further, the air conditioner is provided with a fan,

the overcurrent protection module is a high-capacity filter capacitor.

Further, the air conditioner is provided with a fan,

the driving inversion and protection module adopts an insulated gate bipolar power transistor IGBT as a switching inversion element.

Further, a control method of the high-power variable-frequency adjustable switching power supply system comprises the following steps:

s1, the SOC196 singlechip sends out digital signals;

s2, the timing control module controls the power supply soft start module to be slowly electrified;

s3, the overcurrent protection module carries out overcurrent protection on the power supply soft start module;

s4, modulating the sine wave by the pulse width modulation and control module to obtain a sine pulse width modulation wave;

s5, driving an inversion element IGBT by a driving inversion and protection module to change the frequency of the sine wave, so that the amplitude reaches the frequency modulation and amplitude modulation output, the inversion output is a series resonance type output, and the high-frequency carrier signal is filtered to obtain the sine signal with the required frequency.

The invention has the following beneficial effects:

the high-power variable-frequency adjustable switching power supply system provided by the invention adopts the high-performance insulated gate bipolar power crystal IGBT as the switching inverter element and adopts the inverter power supply developed by the variable-frequency amplitude modulation technology, and has the advantages of high efficiency, reliable performance, small volume and the like.

Drawings

FIG. 1 is a block diagram of the system of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, the high-power variable-frequency adjustable switching power supply system of the present invention includes: the pulse width modulation and control module is connected with the single chip microcomputer, the pulse width modulation and control module and the power supply soft start module are respectively connected with the driving inversion and protection module, the driving inversion and protection module is connected with the output end, and the output end is connected with the feedback compensation module. The single chip microcomputer is an SOC196 single chip microcomputer. The timing control module is an HF8/PSC801B timing power controller. The overcurrent protection module is a high-capacity filter capacitor.

The driving inversion and protection module adopts an insulated gate bipolar power transistor IGBT as a switching inversion element.

A control method of a high-power variable-frequency adjustable switching power supply system comprises the following steps:

s1, the SOC196 singlechip sends out digital signals;

s2, the timing control module controls the power supply soft start module to be slowly electrified;

s3, the overcurrent protection module carries out overcurrent protection on the power supply soft start module;

s4, modulating the sine wave by the pulse width modulation and control module to obtain a sine pulse width modulation wave;

s5, driving an inversion element IGBT by a driving inversion and protection module to change the frequency of the sine wave, so that the amplitude reaches the frequency modulation and amplitude modulation output, the inversion output is a series resonance type output, and the high-frequency carrier signal is filtered to obtain the sine signal with the required frequency.

The invention adopts high-frequency inversion technology, a digital signal generator, sine pulse width modulation and frequency conversion amplitude modulation, and time sequence control electrification and series resonance type output. The power supply has the advantages of high efficiency, large output power, small volume and the like, and the overall processing block diagram of the power supply is shown in the figure.

The sine wave generated by the SOC196 singlechip is modulated by a three-angle modulation wave of 25kHz to obtain a sine pulse width modulation wave, and the sine pulse width modulation wave drives an inverter element IGBT through a driving circuit. The frequency and amplitude of the sine wave is changed, so that the frequency and amplitude modulation output can be achieved, the inversion output is a series resonance type output, and the high-frequency carrier signal is filtered, so that the sine signal with the required frequency is obtained.

The power supply comprises a power source, a time sequence control module, a control circuit and a locking function, wherein the power source is used for supplying power to the power source, the time sequence control module is used for controlling the power source to be slowly electrified during electrification so as to ensure the current to be stable during electrification of the power source and avoid the impact caused by a non-zero-crossing switch, the control circuit is also provided with the fault locking function, once the power source fails, the locking function forbids the IGBT to be switched on, when the fault occurs, the IGBT is switched on by a. Therefore, the power supply part has fault protection and automatic cutting off of the working power supply and automatic discharging functions, and the complete machine is designed with double perfect protection functions of overcurrent, overvoltage, overheating and the like.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.