欧美高清熟妇啪啪内射不卡自拍,日韩少妇内射免费播放18禁裸乳,免费观看18禁无遮挡真人网站,精品久久亚洲中文无码

AC source power & DC source power manufacturing factory

Inverter power supply

Using thyristor circuit to convert direct current into alternating current, the reverse process corresponding to rectification is defined as inversion. For example, the electric locomotive with thyristor can brake the DC motor as a generator when it goes downhill. The locomotive's position energy can be converted into electric energy and sent back to the AC network. For example, if a running DC motor is to be braked quickly, it can also be used as a generator to convert the kinetic energy of the motor into electricity and send it back to the power grid.

The circuit that converts direct current into alternating current is called inverting circuit. Under certain circumstances, the same set of thyristor converter circuit can be used for both rectification and inversion.

When the converter works in the inverted state, if the AC side of the converter is connected to the AC power supply and the DC power is converted into the same frequency AC back to the power grid, it is called active inversion. If the AC side of the converter is not connected to the power grid, but directly connected to the load, that is to say, converting the DC current into a certain frequency or adjustable frequency AC supply load, it is called passive inversion. AC variable frequency speed regulation is based on this principle. Active inverters are used not only in DC reversible speed regulation system, but also in cascade speed regulation of AC winding rotor asynchronous motor and HVDC transmission.

The basic square wave inverters are simple in circuit, but the harmonic content of output voltage waveform is too large, and THD (current harmonic distortion rate) is too large; the harmonic content of output voltage waveform of phase-shifted multi-overlapping plus inverters is small, that is, THD is small, but the circuit is complex. PWM PWM PWM inverters are widely used because they have not only computer circuits but also output voltage waveforms.

The pulse width modulation technique uses a reference wave (usually a sinusoidal wave, sometimes a step wave or a sinusoidal or square wave injected with a zero sequence sound wave, etc.) as the modulation wave, and a triangular wave (sometimes a sawtooth wave) with N times the modulation frequency as the carrier wave for waveform comparison, where the modulation wave is larger than the loading wave. A set of equivalent modulated waves is generated, and the rectangular pulse sequence of amplitude proportional modulated waves is used to equivalent modulated waves. The analog signals are replaced by the switching signals. Through the on-off control of the switching switches of the converter power supply, the direct current is converted into alternating current. This technology is called pulse control technology. Technology. Because the upper phase of carrier triangular wave (or sawtooth wave) is linear, this technique is called coronary artery control mutation technique. Because the upper and lower phases of the carrier triangular wave (or sawtooth wave) are linear, the modulation mode is also linear. When the modulation wave is sinusoidal, the output of the rectangular coronary pulse sequence is linear. The impact varies regularly, which is also known as orthocoronary modulation (Sinusoidal PWM).
Recommend Products
Online service
Service Hotline
86-769-89616802
86-13602353727

ADMIRE POWER
亚洲av永久精品无码桃色| 亚洲精品国产成人片| 亚洲国产欧美在线成人| 日本最新免费二区三区| 亚洲热妇无码av在线播放| 日韩网红少妇无码视频香港| 亚洲日韩精品国产一区二区三区| 国产精品白丝喷水在线观看| 久久婷婷综合色丁香五月| 久久久久久毛片免费播放| 97se亚洲国产综合在线| 色综合久久久久综合体桃花网| 女人国产香蕉久久精品| 久久精品国产99国产精品| 久久久无码中文字幕久...| 粉色午夜视频| 人妻有码中文字幕| 亚洲伊人成综合网| 狠狠躁夜夜躁人人爽天天天天97| 国产精品无码久久久久成人影院 | 真人一对一免费视频| 人与禽性视频77777| 国产va免费精品观看| 国产精品99久久久久久人| 少妇被猛男粗大的猛进出| 性饥渴艳妇性色生活片在线播放| 亚洲第一天堂无码专区| 领导边摸边吃奶边做爽在线观看| 精品国产三级a∨在线观看| 一本色道久久99一综合| 久久久久无码国产精品一区| 羞羞视频在线观看| 国产午夜福利视频在线观看| 国产三级三级三级av精品| 亚洲成av人片一区二区| 中文字幕日产无码| 亚洲欧洲无码av不卡在线| 亚洲色欲色欲综合网站| 成人午夜性a级毛片免费| 色妞色视频一区二区三区四区| 国产成人无码av在线播放dvd|