CN109378977A - 电子式三相宽频电压源 - Google Patents

电子式三相宽频电压源 Download PDF

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Publication number
CN109378977A
CN109378977A CN201811499759.3A CN201811499759A CN109378977A CN 109378977 A CN109378977 A CN 109378977A CN 201811499759 A CN201811499759 A CN 201811499759A CN 109378977 A CN109378977 A CN 109378977A
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China
Prior art keywords
circuit
voltage
phase
bridge circuit
sine
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CN201811499759.3A
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Inventor
王强
刚千惠
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
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Priority to CN201811499759.3A priority Critical patent/CN109378977A/zh
Publication of CN109378977A publication Critical patent/CN109378977A/zh
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

一种电子式三相宽频电压源，包括三相交流电输入端、高压直流电路、H桥电路、PWM控制芯片及三阶正弦滤波电路；所述高压直流电路幅值为565V，整流滤波后的母线电压加到PWM控制芯片驱动的H桥电路两端，H桥电路输出的高频电压经三阶正弦滤波电路输出需要的电压。本发明采用PWM控制芯片对一系列宽窄不等的脉冲进行调制，来等效正弦波形，使幅值、相位和频率可调；采用此种工作方式解决了接触调压器碳刷易损的问题；保证滤波器频率曲线上通带与阻带之间的边界越陡峭，使得滤波器的选择性越高，具有输出阻抗低，滤波效果的的特点，无须增加隔离变压器；宽频电压源滤波后输出宽频电压频率为0.5Hz‑300Hz。

Description

电子式三相宽频电压源
技术领域
本发明涉及三相交流电源，尤其涉及一种电子式三相宽频电压源。
背景技术
三相交流电源由三个频率相同、振幅相等和相位依次互差120度电角度的交流电势组成的电源。三交流电较单相交流电有很多优点，它在发电、输配电以及电能转换成机械能等方面都有明显的优越性。但由于其幅值、相位和频率不可调，应用受限。
发明内容
本发明为解决现有技术存在的上述问题，提供一种幅值、相位和频率可调的电子式三相宽频电压源。
本发明的技术解决方案是：
一种电子式三相宽频电压源，包括三相交流电输入端、高压直流电路、H桥电路、PWM控制芯片及三阶正弦滤波电路；所述H桥电路，通过开关的开合将直流电逆变为某个频率或可变频率的交流电，其开关由PWM控制芯片控制；所述PWM控制芯片为SPWM正弦脉宽调制芯片，H桥电路输出端与三阶正弦滤波电路连接；
所述三相交流电输入端连接三相动力电源，经整流滤波后得到高压直流；所述高压直流电路幅值为565V，整流滤波后的母线电压加到PWM控制芯片驱动的H桥电路两端，H桥电路输出的高频电压经三阶正弦滤波电路输出需要的电压；
进一步，所述H桥电路中IGBT带有热保护功能，能够长时间满负载运行。
本发明的有益效果是：
1、采用PWM控制芯片，具体为SPWM正弦脉宽调制技术，SPWM通过对一系列宽窄不等的脉冲进行调制，来等效正弦波形，使幅值、相位和频率可调，广泛范围广，采用此种工作方式解决了接触调压器碳刷易损的问题。
2、在H桥电路的功率管输出端输出的高频电压滤波方式为三阶滤波，保证滤波器频率曲线上通带与阻带之间的边界越陡峭，使得滤波器的选择性越高，具有输出阻抗低，滤波效果的的特点，无须增加隔离变压器。宽频电压源滤波后输出宽频电压频率为0.5Hz-300Hz，输出电压380V、输出电流50A。
附图说明
构成本发明的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的限定。下面结合附图对本发明作进一步阐述。
图1是电子式三相宽频电压源结构示意图。
具体实施方式
如图1所示，本发明的电子式三相宽频电压源包括三相交流电输入端、高压直流电路、H桥电路、PWM控制芯片及三阶正弦滤波电路。
所述H桥电路，因可使其连接的负载或输出端两端电压或电流反向，在此起到逆变器的作用，通过开关的开合，将直流电逆变为某个频率或可变频率的交流电，其开关由PWM控制芯片控制。
通过PWM控制芯片，具体为SPWM正弦脉宽调制技术，SPWM通过对一系列宽窄不等的脉冲进行调制，来等效正弦波形(幅值、相位和频率)。采用此种工作方式解决了接触调压器碳刷易损的问题，同时电子驱动开关带有热保护功能，能够长时间满负载运行。H桥电路输出的高频电压经三阶正弦滤波电路输出需要的电压，所述H桥电路中IGBT带有热保护功能，能够长时间满负载运行。
所述交流电为三相动力电源，经整流滤波后得到高压直流，所述高压直流电幅值为565V，整流滤波后的母线电压加到PWM控制芯片驱动的H桥电路两端，产生高频电压，H桥电路输出的高频电压经三阶正弦滤波电路输出需要的电压。
所述电子式三相宽频电压源在H桥电路的功率管输出端输出的高频电压滤波方式为三阶滤波，保证滤波器频率曲线上通带与阻带之间的边界越陡峭，使得滤波器的选择性越高，具有输出阻抗低，滤波效果的的特点，无须增加隔离变压器。宽频电压源滤波后输出宽频电压频率为0.5Hz-300Hz，输出电压380V、输出电流50A。

Claims (2)

1.一种电子式三相宽频电压源，其特征是：包括三相交流电输入端、高压直流电路、H桥电路、PWM控制芯片及三阶正弦滤波电路；所述H桥电路，通过开关的开合将直流电逆变为某个频率或可变频率的交流电，其开关由PWM控制芯片控制；所述PWM控制芯片为SPWM正弦脉宽调制芯片；H桥电路输出端与三阶正弦滤波电路连接；所述三相交流电输入端连接三相动力电源，经整流滤波后得到高压直流；所述高压直流电路幅值为565V，整流滤波后的母线电压加到PWM控制芯片驱动的H桥电路两端，H桥电路输出的高频电压经三阶正弦滤波电路输出需要的电压。
2.根据权利要求1所述的电子式三相宽频电压源，其特征是：所述H桥电路中IGBT带有热保护功能。
CN201811499759.3A 2018-12-09 2018-12-09 电子式三相宽频电压源 Pending CN109378977A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1361586A (zh) * 2000-12-27 2002-07-31 深圳市安圣电气有限公司 一种串联多电平高电压逆变器
CN201409090Y (zh) * 2009-05-21 2010-02-17 湖南中科电气股份有限公司 二相/三相复用型spwm调制电磁搅拌器变频电源
CN104660057A (zh) * 2013-11-18 2015-05-27 赵宝瀛 一种交流稳压电源
CN205647274U (zh) * 2016-05-24 2016-10-12 韩伟 一种单相变频可调电源装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1361586A (zh) * 2000-12-27 2002-07-31 深圳市安圣电气有限公司 一种串联多电平高电压逆变器
CN201409090Y (zh) * 2009-05-21 2010-02-17 湖南中科电气股份有限公司 二相/三相复用型spwm调制电磁搅拌器变频电源
CN104660057A (zh) * 2013-11-18 2015-05-27 赵宝瀛 一种交流稳压电源
CN205647274U (zh) * 2016-05-24 2016-10-12 韩伟 一种单相变频可调电源装置

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