400W大功率稳压逆变器电路

PWM逆变器电路逆变器, 电路图, 晶体管, 振荡器逆变器的电路图逆变器电路关于电路电阻R2和电容C1套集成电路内部振荡器的频率。

预设R1可用于振荡器的频率进行微调。

14脚和11脚IC内部驱动晶体管的发射极终端。

的驱动晶体管（引脚13和12）的集电极终端连接在一起，并连接到8 V轨（7808输出）。

可在IC的引脚14和15两个180度，淘汰50赫兹脉冲列车。

这些信号驱动器在随后的晶体管阶段。

当14脚的信号为高电平，晶体管Q2接通，就这反过来又使晶体管Q4，Q5，Q6点从目前的+12 V电源（电池）连接流一个通过的上半部分（与标签的标记）变压器（T1）中，小学通过晶体管Q4，Q5和Q6汇到地面。

因此诱导变压器二次电压（由于电磁感应），这个电压220V输出波形的上半周期。

在此期间，11脚低，其成功的阶段将处于非活动状态。

当IC引脚11云高的第三季度结果Q7的获取和交换，Q8和Q9将被打开。

从+12 V电源通过变压器的初级下半部和汇到地面通过晶体管的Q7，Q8，Q9，以及由此产生的电压，在T2次级诱导有助于的下半部周期（标签上标明）电流流220V输出波形。

逆变电路的输出电压调节部分的工作原理如下。

逆变器输出（T2的输出）挖掘点的标记为B，C，并提供给变压器T2的主。

在变压器T2的下降这个高电压的步骤，桥梁D5整流它和这个电压（将逆变器的输出电压成正比）是提供的PIN1通过奥迪R8，R9，R16和（该IC的内部错误放大器的反相输入）这个电压与内部参考电压比较。

此误差电压成正比的输出电压所需的值和IC调节占空比的驱动信号（引脚14和12）为了使输出电压为所需的值的变化。

R9的预设，可用于调节逆变器输出电压，因为它直接控制变频器的输出电压误差放大器部分的反馈量。

及其相关组件产生8V电源从12V电源供电IC及其相关的设计电路。

二极管D3和D4续流二极管，保护驱动级晶体管的开关变压器（T2）初选时产生的电压尖峰。

逆变器的电路图及维修简要随着绿色能源可再生能源的大规模开发和利用，太阳能凭借其独特的优点得到了更多的关注。

太阳能是当前世界上最清洁、最现实、大规模开发利用最有前景的可再生能源之一。

其中太阳能光伏利用受到世界各国的普遍关注，而太阳能光伏并网发电是太阳能光伏利用的主要发展趋势，必将得到快速的发展。

本论文就是在此背景下，对太阳能并网发电系统中最大功率跟踪控制技术、并网控制策略、孤岛效应检测方法等进行了研究，具有重要的现实意义。

太阳能光伏并网发电系统的两个核心部分是太阳能电池板的最大功率点跟踪（MPPT）控制和光伏并网逆变控制。

本文重点对光伏发电的逆变器最大功率点跟踪技术、孤岛检测技术以及光伏电站并网控制技术进行了讨论，并且预测了光伏发电技术的发展趋势。

1研究背景传统电能的生产百分之六七十都采用的火电形式，火电是用煤发电，有大量的温室气体和有毒气体产生，这些气体的排放破坏生态平衡，并且全球各国工业对煤、石油、天然气等化石能源的需求量急剧增长，而这些不可再生能源的储量是有限的，越来越少，不该作为燃料耗尽。

太阳能具有分布广泛，资源可再生，易采集，清洁、干净、污染小，建造灵活方便，扩容方便，具有通用性，有可存储性等特点。

太阳能系统可以加入蓄电池储存电能，光伏建筑集成，把太阳能光伏发电系统直接与建筑物相结合，这样能节省发电站使用的土地面积、减少了传输成本。

最后太阳能光伏具有分布式特点，光伏发电系统的分布式特点既可以提高整个能源系统的安全可靠性，特别是从抵御自然灾害和战备的角度看，更具有明显的意义。

2光伏并网发电系统的基本介绍2.1光伏并网发电系统的基本原理太阳能光伏发电并网系统是将太阳能光伏阵列发出的直流电转化为与公共电网电压同频同相的交流电，因此该系统是既能满足本地负载用电又能向公共电网送电。

一般情况下，公共电网系统可看作是容量为无穷大的交流电压源。

当太阳能光伏发电并网系统中太阳能光伏阵列的发电量小于本地负载用电量时，本地负载电力不足部分由公共电网输送供给；当光伏电池阵列的发电量大于本地负载用电量时，太阳能光伏系统将多余的电能输送给公共电网，实现并网发电。

tl494简单逆变器电路分析一、TL494介绍TL494是一种固定频率脉宽调制电路，它包含了开关电源控制所需的全部功能，广泛应用于桥式单端正激双管式、半、全桥式开关电源。

1、TL494内部结构2、主要特征1、集成了全部的脉宽调制电路。

2、片内置线性锯齿波振荡器，外置振荡元件仅两个（一个电阻和一个电容）。

3、内置误差放大器。

4、内置5V参考基准电压源。

5、可调整死区时间。

6、内置功率晶体管可提供500mA的驱动能力。

7、推或拉两种输出方式。

3、引脚图二、经典tl494逆变应用1、应用一这个算是最简单的应用了：屏蔽了两个误差放大器的功能，但缓启动，死区功能还是保留的。

一般应用效率最高，非常稳定。

1：按手册要求两个误差放大器屏蔽的话要求误差放大器输入端正极要求接地（图中1脚和16脚通过1K的电阻接地了），误差放大器输入端负极要求接高电位（2脚和15脚是接入了14脚的5V基准端了）。

注意下TL494的14脚是个5V输出的精密稳压电源，好多应用都是从这个基准端取样的。

这样TL494的1脚2脚15脚16脚再加上3脚（3脚是两个误差放大器的输出汇总端，因为屏蔽了两个误差放大器就不去考虑3脚了）的功能就不去用它了。

2:TL494的4脚是死区控制端，电压输入0-4V的话可使占空比从最大到关闭是为止（45%-0%）.4脚直接接地的话占空比是最大了（不过放心厂家已经在集成电路内部做好了合适的死区电路，4脚就是直接接地也留有死区）。

在上图种就是利用4脚接入C1和R1的中间，电容正极接14脚的5V基准电位，通过R1给电容充电，这样开机后4脚开始是5V的电位到电容充满电后4脚变0V（真好完成占空比从0%到最大）整个缓启动的时间长短就C1和R1的时间常数决定（加大电阻或电容缓启动时间变长反之就短了）。

3:5脚6脚是决定振荡频率的，公式是F=1.1/（R*C）注意下整个频率算出来是单端应用的频率，如果推挽应用的话还要除以二。

这里一起把TL494单端应用和推挽应用的方式也讲下：TL494的13脚决定了工作方式，13脚接地的话是单端应用如果接14脚5V输出端就是推挽应用了。

采用TL494的400W大功率稳压逆变器电路采用TL494的400W大功率稳压逆变器电路笔者曾用过300W逆变器，利用12V/60AH蓄电池向上述家用电器供电，一次充满电后，可使用近5小时。

标称功率300W的逆变电源，用于家庭电风扇、电视机，以及日常照明等是不成问题的。

不过，即使蓄电池电压充足，启动180立升的电冰箱仍有困难，因启动瞬间输出电压下降为不足180V而失败。

电冰箱压缩机标称功率多为100W 左右，实际启动瞬间电流可达2A以上，若欲使启动瞬间降压不十分明显，必须将输出功率提高至600VA。

如在增大输出功率的同时，采用PWM稳压系统，可使启动瞬间降压幅度明显减小。

无论电风扇还是电冰箱，应用逆变电源供电时，均应在逆变器输出端增设图1中的LC滤波器，以改善波形，避免脉冲上升沿尖峰击穿电机绕组。

采用双极型开关管的逆变器，基极驱动电流基本上为开关电流的1/β，因此大电流开关电路必须采用多级放大，不仅使电路复杂化，可靠性也变差而且随着输出功率的增大，开关管驱动电流需大于集电极电流的１／β，致使普通驱动IC无法直接驱动。

虽说采用多级放大可以达到目的，但是波形失真却明显增大，从而导致开关管的导通/截止损耗也增大。

目前解决大功率逆变电源及UPS的驱动方案，大多采用MOS FET管作开关器件。

一、MOSFET管的应用近年来，金属氧化物绝缘栅场效应管的制造工艺飞速发展，使之漏源极耐压(VDS)达kV以上，漏源极电流(IDS)达50A已不足为奇，因而被广泛用于高频功率放大和开关电路中。

除此而外，还有双极性三极管与MOS FET管的混合产品，即所谓IGBT绝缘栅双极晶体管。

顾名思义，它属MOS FET管作为前级、双极性三极管作为输出的组合器件。

因此，IGBT既有绝缘栅场效应管的电压驱动特性，又有双极性三极管饱合压降小和耐压高的输出特性，其关断时间达到0.4μs以下，VCEO达到1.8kV，ICM达到100A的水平，目前常用于电机变频调速、大功率逆变器和开关电源等电路中。

DC TO AC POWER INVERTERPWRINV400W INSTRUCTION MANUALSAVE THIS MANUALYou will need the manual for the safety warnings and precautions, assembly instructions, operating and maintenance procedures, parts list and diagram. Keep your invoice with this manual. Write the invoice number on the inside of the front cover. Keep the manual and invoice in a safe and dry place for future reference.Basic Operation•Make sure that you choose the right operating voltage for both input and output of the inverter.•When unpacking, make sure that the inverter is in good condition. If any parts are missing or broken, please call AIMS Power, Inc. at the number found on the warranty card.•Place the power inverter on a flat surface. Make sure it has adequate ventilation and is not in direct sunlight. Fasten the inverter securely to the surface, using screws or some othermeans. If holes are to be drilled, follow safe, proper installation techniques.•Before you connect the battery cables, make sure the power switch is in the off position.Connect Red (+) battery cable to Red (+) inverter terminal. Connect Black (-) battery cable to Black (-) inverter terminal. Connect Red (+) battery cable to Red (+) battery terminal. Connect Black (-) battery cable to Black (-) battery terminal. Alligator clamp cables may be used but only to connect to the battery. Do not use clamps on inverter terminals. Alligator clamps are not a permanent solution. You may see a spark during connection.•Connect the ground cable to an earth ground, such as a metal water pipe or to the vehicle ground when used in a vehicle if the inverter includes a ground port.•Turn the power switch to the on position, which is located on the front of the inverter. The green LED light will confirm that AC power is present.•Before plugging the equipment into the inverter, make sure the equipment AND the inverter are off. Turn inverter on first, then turn on the equipment.•The power inverter can be used either while the engine is running or off.Warnings•Unplug the inverter when it is not in use.•If the AC inverter makes a beeping sound, turn off the equipment, unpl ug the inverter and restart the vehicle’s engine. The beeping sound is simply the low-battery warning, which indicates that the voltage of your battery is getting low. If you do not re-start your engine and continue operating the inverter, the inverter will automatically shut off, leavingyour vehicle's battery at about 10. 5 VDC. This will allow you to start your engine and resumeoperation of the inverter. It also reduces the fear of being stranded with a dead battery(dependent on health of battery).•This device should only be serviced by a qualified technician. This item does not have any serviceable parts.•Prevent body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerator enclosures during installation.•Do not operate the inverter if under the influence of alcohol or drugs. Read warning labels on prescriptions to determine if your judgement or reflexes are impaired while taking drugs. Ifthere is any doubt, do not operate the inverter.•People with pacemakers should consult their physician(s) before using this product.Electromagnetic fields in close proximity to a heart pacemaker could cause interference to or failure of the pacemaker.•Keep children away. Children must never be allowed in the work area. Do not let them handle machines, tools, or extension cords.•Store idle equipment. When not in use, inverter must be stored in a dry location to prevent rust. Always lock up tools and the inverter and keep out of reach of children.•Size the inverter properly. Size the inverter for the surge rating of your equipment. The inverter’s continuous rating should be MORE than the surge rating of your equipment.Example: Power tool runs at 1500 watts but surges at 2500 watts. You should use an inverter >3000 watts.•Keep the inverter well-ventilated. Do not place any objects on top of or next to the inverter or allow anything to cover the cooling fans; doing so can cause the inverter to overheat,causing a potential fire hazard and/or damage to the inverter. Leave adequate ventilationspace underneath the inverter as well; thick carpets or rugs can obstruct air flow, causing the inverter to overheat.•Avoid unintentional starting. Be sure the switch is in the OFF position when not in use and before plugging in any appliance.Note: Performance of this unit may vary depending on the available battery power or appliance wattage.Warning: The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be built into this product, but must be supplied by operator. Guard against electric shock. Do not open the metal case; risk of electric shock.Battery Use•To avoid over-discharging your vehicle battery, we recommend running your engine for 10-20 minutes to recharge the vehicle's battery if battery voltage drops <11V.•To properly size your battery, use the following formula: Volts * Amps = Watts or Watts/Volts = Amps. Example: 1000 watt inverter / 12 volts DC = 83.3 DC amps. In this example, you willneed 83.3 amps to power a 1000 watt load for 1 hour. If you need to power 1000 watts for 2hours you will need 83.3 * 2 = 166.66 DC amps available. A 100 amp hour battery will giveyou 100 amps / 166.66 = .6 hours so you will need two batteries if using 100 amp battery.This is if you fully deplete your batteries. We do NOT recommend fully depleting yourbatteries. This is just an example. Your power requirements may be different.•If you choose to use a female 12 Volt DC adapter for your inverter or to the inverter make sure wire size is correct.•IF YOU CONNECT THE WIRES TO THE INCORRECT TERMINALS, YOU WILL REVERSE THE POLARITY AND DAMAGE THE INVERTER.•REVERSED POLAR ITY WILL INSTANTLY VOID THE WARRANTY OF YOUR INVERTER, SO BE CAREFUL TO CONNECT YOUR INPUT WIRES PROPEPLY.•If you choose to operate a battery charger to replenish your battery’s voltage, be sure to check with charger manufacture before damaging the charger.•CONNECTING THE INVERTER’S DC INPUT TO A BATTERY CHARGER WILL VOID THE WARRANTY, AND MAY DAMAGE THE INVERTER.•Make sure that the battery voltage does not exceed 15 volts DC.•CONNECTING THE INVERTER TO A DC POWER SOURCE GREATER THAN 15 VDC WILL VOID THE WARRANTY, AND MAY DAMAGE THE INVERTER.CablesWe recommend that you refrain from using battery cables longer than 12 feet between the DC power source and the DC input of the inverter. Longer battery cables on the DC input will create a voltage drop which results in a reduction of efficiency and output. If you require more than 12 feet, use a bigger cable. We recommend using an extension cord between the AC output and AC appliance. You may use up to 100ft, high quality extension cord. A longer cord may result in reduced output. See Specifications chart for recommended battery cable size.Remote On/Off SwitchSome models include a remote port. An AIMS remote on/off switch may be connected to the remote port. The optional remote on/off switch is a convenientoption to turn the inverter on/off if the inverter is installed in a hard to reach area. Make sure the inverter is turned off before installing the remote switch. Plug the switch into the remote jack and then turn the main switch to the OFF position for the remote to work properly.Measuring The AC VoltageThe output waveform of the inverter is a MODIFIED SINE WAVE. If you choose to measure the AC output voltage, you must use a TRUE RMS MULTI METER. Using any other type of voltage measuring device will result in an AC voltage reading of 10 to 30 volts lower than actual voltage. When using a true RMS multi meter, you will get an accurate reading.SAFETY PRECAUTIONS•Do not open the case of the inverter. The high voltage inside the unit is the same type of power as your electrical outlets at home.•Do not let the cord of the inverter, or any appliance cord get wet. If you are operating the inverter in a moving vehicle, we recommend that you secure the inverter to prevent it fromshifting around while the vehicle is moving.•Do not operate this inverter in or around water. Water can damage the inverter, and water damage is not covered under warranty. Also, do not operate the inverter with wet hands. The AC voltage of the unit makes it an electrical shock hazard if operated with wet hands.•Allow at least 12 inches of clearance around the Inverter for air flow. Ensure the ventilation openings on the rear and bottom of the unit are not obstructed.•Do not connect the inverter directly to another AC power source. Damage may result, and such damage will void the inverter warranty.•Know the wattage requirements of your appliance. Use only those appliances which are limited by the capacity of this unit.•Use common sense. This device produces power just like your wall outlets at home and should be treated seriously. Keep it away from children.•Reversed polarity of AC power outlet LINE /NEUTRAL will void the warranty.•If there is anything wrong with the inverter, disconnect all of the power and contact technical support.If the Inverter does not appear to be functioning properly, check the following possible causes:•Poor contact: Clean contact parts thoroughly.•If the low battery alarm sounds, this means the input voltage is too low and battery needs to be recharged.•If you are getting a low output voltage, try reducing the load to minimize watts. You may have overloaded the inverter. Reduce your load. Also, keep input voltage above 10.5 volts tomaintain a constant flow of power.•If you are not getting any power output, turn the power switch Off and On again, until the green power light comes on. Your devices may draw too much power to operate them. Theinverter may be in thermal shutdown. Let it cool down and make sure there is adequateventilation around the unit.•If the green light turns red one of the following has happened:A.input voltage is too lowB.input voltage is too highC.short circuitD.inverter is close to overload•Battery voltage is too low: Start the engine to recharge the battery. Replace or recharge battery if needed.•Shuts down on overload: Reduce the wattage of your load.•Thermal shutdown: Under heavy loads for extended period, the inverter will shut down to prevent damage from excess heat. Simply reduce your load and allow theInverter to cool down.•Low-battery shutdown: Recharge your battery and resume operation.Very little maintenance is required to keep your inverter operating properly. You should disconnect input power first and then clean the exterior of the unit periodically with a dry cloth to prevent accumulation of dust and dirt. At the same time, tighten the screws on the DC input terminals.PLEASE READ THE FOLLOWING CAREFULLYNeither the manufacturer nor distributor makes any representation or warranty of any kind to the buyer that he or she is qualified to make any repairs to the product or that he or she is qualified to replace any parts of the product. In fact, the manufacturer and/or distributor expressly states that allrepairs and parts replacements should be undertaken by certified and licensed technicians and not by the buyer. The buyer assumes all risk and liability arising out of his or her repairs to the original product or replacement parts thereto, or arising out of his or her installation of replacement parts thereto.WARRANTYAIMS Corp., Inc. dba AIMS Power Warranty Instructions:This product is designed using the most modern digital technology and under very strict quality control and testing guidelines. If, however, you feel this product is not performing as it should, please contact us:**************************(775)359-6703We will do our best to resolve your concerns. If the product needs repair or replacement, make sure to keep your receipt/invoice, as that will need to be sent back along with the package and RMA# prepaid to AIMS. You have a full 1 year warranty from date of purchase.This warranty is valid worldwide with the exception that freight and duty charges incurred outside the contiguous 48 United States will be prepaid by customer.Except as provided above, AIMS makes no warranty of any kind, express or implied, including without limitation the implied warranties of merchantability and fitness for a particular purpose. In no event shall AIMS be liable for indirect, special or consequential damages. This warranty only applies to AIMS Power branded products. All other name brand products are warranted by and according to their respective manufacturer. Please do not attempt to return non-AIMS Power branded products to AIMS Power.For additional products such as:-Modified sine wave inverters-Pure sine wave inverters-Low Frequency Inverters-Solar Charge Controllers-Micro Grid Tied Inverters-Inverter Chargers and Automatic transfer switches-Converters DC-DC-Custom cut cables-Batteries-Solar Panels & RacksPlease visit our web site: Tofindoutwheretobuyanyofourproducts,youmayalsoe-mail:************************ (775)359-6703.。

TL494充电器原理与维修电动自行车充电器多采用开关电源，型号虽多，但电路结构大同小异，主要区别在于所选的脉宽调制（PWM）芯片不同如（UC3845、UC3842、SG3524、TL494）。

现以佳腾牌充电器为例，介绍其原理和故障检修方法。

一、电路原理根据实物测绘的佳腾牌充电器电路原理如图1所示。

整机可分为PWM产生和推动电路、功率开关变换电路、充电状态指示电路和交流输入电路四个部分。

1.PWM产生和推动电路PWM产生电路由IC1TL494和外围元件构成。

TL494是PWM开关电源集成电路。

引脚功能和内部框图如图2所示。

IC1的第5、6脚外接的C10、R19是定时元件，决定锯齿波振荡器的振荡频率，F=1.1/RC，按图中数值为50KHz。

第14脚是+5V基准电压输出端，除芯片内部使用外，还直接或分压后供第2、4、13脚和IC2使用。

第13脚为输出方式控制端，该脚接低电平时为单端输出方式，图中接第14脚+5V高电平，为双端输出方式。

第4脚为死区电压控制端，该脚电压决定死区时间。

电位升高，死区时间延长，输出脉宽变窄，当电压大于锯齿波电压时，输出脉宽将变得很窄，甚至停振。

凡输出端采用全桥或半桥式的开关电路，都要正确设置死区时间，以免两个开关管同时导通，发生电源短路的危险。

图中该脚电位由基准电压经R24和R20分压取得，实测电压为0.46V。

第1 、2脚和第16、15脚是IC1内部的两个电压比较器的正、反相输入端，分别用作充电电压取样和充电电流取样。

+44V充电电压经R28、R27和R26 分压反馈至第1脚。

C15是软启动电容。

第2脚电位由基准电压经R23和R3分压取得，实测为3.2V。

第1脚电压越高，输出脉宽越窄，充电电压越低；反之脉宽增宽，充电电压升高。

从而实现+44V充电电压的目的。

Ra是充电电压调试电阻，Ra和R26并联值越小，充电电压越高。

R29是脚充电电流取样电阻，由该电阻上取得的电压变化，经R13送入IC1的第15脚。

逆变器电路图各图对应讲解齐全逆变器是一种把直流电能(电池、蓄电池)转变成交流电(一般为220伏50HZ正弦波或方波)的装置。

我们常见的应急电源，一般都是把直流电瓶逆变成220V交流的。

简单来讲，逆变器就是一种将直流电转化为交流电的装置。

下面让我们来看看逆变器电路图及相关介绍。

一、逆变器电路图及介绍1、性能优良的家用逆变电源电路图这种设计，材料易取，输出功率150W，本电路设计频率为300HZ左右，目的是缩小逆变变压器的体积、重量、输出波形方波。

这款逆变电源可以用在停电时家庭照明，电子镇流器的日光灯，开关电源的家用电器等其他方面。

这款逆变器较为容易制作，可以将12V 直流电源电压逆变为220V市电电压，电路由BG2和BG3组成的多谐振荡器推动，再通过BG1和BG2驱动，来控制BG6和BG7工作。

其中振荡电路由BG5与DW组的稳压电源供电，这样可以使输出频率比较稳定。

在制作时，变压器可选有常用双12V输出的市电变压器。

可根据需要，选择适当的12V蓄电池容量。

2、高效率的正弦波逆变器电器图该电路用12V电池供电。

先用一片倍压模块倍压为运放供电。

可选取ICL7660或MAX1044。

运放1产生50Hz正弦波作为基准信号。

运放2作为反相器。

运放3和运放4作为迟滞比较器。

其实运放3和开关管1构成的是比例开关电源。

运放4和开关管2也同样。

它的开关频率不稳定。

在运放1输出信号为正相时，运放3和开关管工作。

这时运放2输出的是负相。

这时运放4的正输入端的电位(恒为0)总比负输入端的电位高，所以运放4输出恒为1，开关管关闭。

在运放1输出为负相时，则相反。

这就实现了两开关管交替工作。

当基准信号比检测信号，也即是运放3或4的负输入端的信号比正输入端的信号高一微小值时，比较器输出0，开关管开，随之检测信号迅速提高，当检测信号比基准信号高一微小值时，比较器输出1，开关管关。

这里要注意的是，在电路翻转时比较器有个正反馈过程，这是迟滞比较器的特点。

逆变器电路原理图逆变器是一种将直流电转换为交流电的电子器件，广泛应用于太阳能发电系统、风能发电系统、电动汽车和UPS等领域。

逆变器电路原理图是设计和制造逆变器的重要参考资料，它展示了逆变器内部电路的连接和工作原理，对于工程师和技术人员来说具有重要的参考价值。

逆变器电路原理图通常由多个部分组成，包括整流器、滤波器、逆变器、控制电路等。

首先，整流器部分将输入的直流电源转换为平稳的直流电压，然后经过滤波器进行滤波处理，去除电压中的杂波和谐波，使输出的直流电压更加稳定。

接下来，经过逆变器部分的处理，直流电压被转换为交流电压，输出到负载端使用。

控制电路则对整个逆变器系统进行监控和控制，确保逆变器的稳定运行和保护系统的安全。

在逆变器电路原理图中，不同的部分通过线路连接起来，形成一个完整的电路系统。

各个元件的选型和连接方式都对逆变器的性能和稳定性产生重要影响。

因此，在设计逆变器电路原理图时，需要充分考虑各个部分之间的匹配和协调，确保整个系统能够正常工作。

逆变器电路原理图的设计需要结合具体的应用场景和要求，选择合适的元件和电路拓扑结构。

不同类型的逆变器，如单相逆变器、三相逆变器、桥式逆变器等，其电路原理图也会有所不同。

同时，逆变器的功率级别和输出波形类型也会对电路设计产生影响，需要根据具体情况进行调整和优化。

总的来说，逆变器电路原理图是逆变器设计和制造的关键参考资料，它直接影响着逆变器的性能和稳定性。

工程师和技术人员需要对逆变器的工作原理和电路结构有深入的理解，才能设计出高性能、高可靠性的逆变器系统。

通过不断的实践和研究，逆变器电路原理图将会得到不断的完善和优化，推动逆变器技术的发展和应用。

查看文章如何直流电(DC)变交流电(AC)?---逆变器-有电路图（最下）2010-01-16 16:31逆变器（inverter）是把直流电能（电池、蓄电瓶）转变成交流电（一般为220v50HZ 正弦或方波）。

应急电源，一般是把直流电瓶逆变成220V交流的。

通俗的讲，逆变器是一种将直流电（DC）转化为交流电（AC）的装置。

它由逆变桥、控制逻辑和滤波电路组成．利用TL494组成的400W大功率稳压逆变器电路。

它激式变换部分采用TL494，VT1、VT2、VD3、VD4构成灌电流驱动电路，驱动两路各两只60V/30A的MOS FET开关管。

如需提高输出功率，每路可采用3～4只开关管并联应用，电路不变。

TL494在该逆变器中的应用方法如下：第1、2脚构成稳压取样、误差放大系统，正相输入端1脚输入逆变器次级取样绕组整流输出的15V直流电压，经R1、R2分压，使第1脚在逆变器正常工作时有近4.7～5.6V取样电压。

反相输入端2脚输入5V基准电压(由14脚输出)。

当输出电压降低时，1脚电压降低，误差放大器输出低电平，通过PWM电路使输出电压升高。

正常时1脚电压值为5.4V，2脚电压值为5V，3脚电压值为0.06V。

此时输出AC电压为235V(方波电压)。

第4脚外接R6、R4、C2设定死区时间。

正常电压值为0.01V。

第5、6脚外接CT、RT设定振荡器三角波频率为100Hz。

正常时5脚电压值为1.75V，6脚电压值为3.73V。

第7脚为共地。

第8、11脚为内部驱动输出三极管集电极，第12脚为TL494前级供电端，此三端通过开关S控制TL494的启动/停止，作为逆变器的控制开关。

当S1关断时，TL494无输出脉冲，因此开关管VT4～VT6无任何电流。

S1接通时，此三脚电压值为蓄电池的正极电压。

第9、10脚为内部驱动级三极管发射极，输出两路时序不同的正脉冲。

正常时电压值为1.8V。

第13、14、15脚其中14脚输出5V基准电压，使13脚有5V高电平，控制门电路，触发器输出两路驱动脉冲，用于推挽开关电路。