英文原文：

Inverter into ac, dc will lower if dc voltage transformer, through the communication, namely receive standard pressor ac voltage and frequency. For large capacity of inverter, due to the dc bus voltage is higher, ac output generally do not need to boost transformer can achieve 220V, in medium and small volume of inverter, due to the low voltage dc 12V, such as, must design, 24V pressor circuit.
In general, small volume inverter mosfet inverter circuit, there the whole bridge with high frequency inverter circuits pressor push-pull inverter circuits, and will boost the circuit transformer neutral plug up in power, two power tube is alternant, output power, because get ac power transistor DeBian altogether, drive and control circuit is simple, because of the transformer has certain leakage, can limit the short-circuit current, thus improving the reliability of the circuit. Its defect is driven low utilization, transformer perceptual load ability is poor.
The bridge has push-pull inverter circuit to overcome the shortcoming, power transistor circuits of the output pulse width adjustment, the output voltage of the RMS is changed. Because of this circuit has free-wheeling loop, even to the perceptual load, the output voltage waveform nor distortion. This circuit faults is under the arm, bridge, no power transistor must therefore be adopted by isolating circuit or special driving power. In addition, in order to prevent, bridge, and the common arms occurs before the final design must be shut, namely current must set time, the dead zone circuit structure is relatively complicated.
Photovoltaic (pv) grid inverter circuit control circuit:
These kinds of inverter circuit are needed to control circuit, general square wave and are weak wave two control mode, the output pulse inverter circuit is simple, low cost, low efficiency, harmonic components. Sine wave output is the development trend of the inverter, along with the development of microelectronics technology, PWM function of micro processor is also available, so the sinusoidal output inverter technology has matured.
1 the output pulse current inverter using PWM integrated circuit, such as SG3525 TL494, etc. Practice shows that the SG3525 integrated circuits, and adopts power mosfet as switch power components, can achieve higher performance price of inverter, because SG3525 has direct driving power mosfet ability and internal standards and operational amplifiers and the voltage protection function, thus its outer circuit is simple.
2 the sinusoidal output inverter control circuits, sine wave output inverter, the control circuit can be used as INTEL microprocessor control, the company produces 80C196MC, MOTOROLA MP16 production and CROCHIP company production of MI - PIC16C73 etc, these microcontroller is more road, and PWM generator set, the bridge between the arms of the dead zone, INTEL company adopted 80C196MC realization of the output circuit, sine wave 80C196MC complete sine signals, and the test voltage output voltage, realize communication.)

译文：

逆变器将直流电转化为交流电，若直流电压较低，则通过交流变压器升压，即得到标准交流电压和频率。对大容量的逆变器，由于直流母线电压较高，交流输出一般不需要变压器升压即能达到２２０Ｖ，在中、小容量的逆变器中，由于直流电压较低，如１２Ｖ、２４Ｖ，就必须设计升压电路。
　　中、小容量逆变器一般有推挽逆变电路、全桥逆变电路和高频升压逆变电路三种，推挽电路，将升压变压器的中性插头接于正电源，两只功率管交替工作，输出得到交流电力，由于功率晶体管共地边接，驱动及控制电路简单，另外由于变压器具有一定的漏感，可限制短路电流，因而提高了电路的可靠性。其缺点是变压器利用率低，带动感性负载的能力较差。
　　全桥逆变电路克服了推挽电路的缺点，功率晶体管调节输出脉冲宽度，输出交流电压的有效值即随之改变。由于该电路具有续流回路，即使对感性负载，输出电压波形也不会畸变。该电路的缺点是上、下桥臂的功率晶体管不共地，因此必须采用专门驱动电路或采用隔离电源。另外，为防止上、下桥臂发生共同导通，必须设计先关断后导通电路，即必须设置死区时间，其电路结构较复杂。
　　光伏并网逆变器逆变电路的控制电路:
　　上述几种逆变器的主电路均需要有控制电路来实现，一般有方波和正弱波两种控制方式，方波输出的逆变电源电路简单，成本低，但效率低，谐波成份大。正弦波输出是逆变器的发展趋势，随着微电子技术的发展，有ＰＷＭ功能的微处理器也已问世，因此正弦波输出的逆变技术已经成熟。
　　1.方波输出的逆变器目前多采用脉宽调制集成电路，如ＳＧ３５２５，ＴＬ４９４等。实践证明，采用ＳＧ３５２５集成电路，并采用功率场效应管作为开关功率元件，能实现性能价格比较高的逆变器，由于ＳＧ３５２５具有直接驱动功率场效应管的能力并具有内部基准源和运算放大器和欠压保护功能，因此其外围电路很简单。
　　2.正弦波输出的逆变器控制集成电路，正弦波输出的逆变器，其控制电路可采用微处理器控制，如ＩＮＴＥＬ公司生产的８０Ｃ１９６ＭＣ、摩托罗拉公司生产的ＭＰ１６以及ＭＩ－ＣＲＯＣＨＩＰ公司生产的ＰＩＣ１６Ｃ７３等，这些单片机均具有多路ＰＷＭ发生器，并可设定上、上桥臂之间的死区时间，采用ＩＮＴＥＬ公司８０Ｃ１９６ＭＣ实现正弦波输出的电路，８０Ｃ１９６ＭＣ完成正弦波信号的发生，并检测交流输出电压，实现稳压。

逆变器英文