91视频国产高清-91视频国产精品-91视频国产精品免费观看-91视频国产精品在线播放-91视频国产免费-91视频国产免费观看

Variable-frequency Drive

Variable-frequency Drive

Overview:
Variable-frequency Drive use frequency conversion technology and microelectronic technology, by changing the motor power supply frequency to control power control equipment for AC motor.
VFD is mainly composed of rectifier (ac to dc), filter, inverter (dc to ac), brake unit, drive unit, detection unit and micro processing unit, etc.
VFD can adjust the voltage and frequency for output power supply by internal IGBT cutting off , based on the actual needs of the motor to provide the needed voltage of power supply, and then achieve the goal of energy saving and speed regulating. In addition, VFD also have many functions, such as over-current, over-voltage protection, overload protection, etc.
Along with the continuous improvement of industrial automation, VFD also got very extensive application.

聯(lián)系我們
010 87973866
  • 參數(shù)表
  • 組合系統(tǒng)
  • 樣本
  • 三維圖
  • Function:

    Frequency conversion and energy saving

    The energy-saving of Variable-frequency Drive is mainly showed on the application of fan and water pump. In order to guarantee the reliability of the production, all kinds of production machinery when design with power drive, has the certain amount of surplus. When motors can’t work under full load, In addition to meet the requirements of power driven, superfluous torque increased the consumption of active power and cause the electricity waste. The traditional speed regulation method for equipments such as fan and pump is by adjusting the barrier of entry or exit and valve opening to adjust wind volume and water volume, its input power is large, and a lot of energy consumption in the process of baffle and valve closure. When use the Variable-frequency Drive to speed regulation, If traffic demand decreases, and it can meet the requirements by reducing the pump or fan rotation speed

    The motor adopts Variable-frequency Drive is for speed regulation and reduce the starting current. In order to produce variable voltage and frequency, this equipment need to change the power as direct current (DC) instead of alternating current (AC), this process is called rectification.

    The device can convert direct current (DC) to alternating current (AC) which scientific terminology is inverter. In general, inverter can change direct current (DC) into inverter power with fixed-frequency and voltage. Inverter with adjustable frequency and adjustable voltage, we call it Variable-frequency Drive (VFD). The waveform output by VFD is modified sine wave, it is mainly used in three-phase asynchronous motor drive for speed regulation, it is also called variable frequency speed controller. Variable-frequency power is the variable frequency inverter which is mainly used in the instrument of testing equipment with higher waveform requirement and it need to arrange waveform and output standard sine wave. The price for variable-frequency power is 15-20 times higher than VDF. Due to the main device in VDF equipment which can produce variable voltage and frequency is called inverter, so the product itself is named for inverter, that is VDF.  

    VDF can’t save electricity everywhere which contains several occasions. As electronic circuit, inverter itself need power consumption (About 3-5% of the nominal power). A 1.5 air conditioning need 20-30W power consumption, equivalent to an incandescent light. It is the truth that VDF has power saving function when working under power frequency. But the premise conditions are as follows:

    1.   High power and load for the fan/pump;

    2.   Device has a power saving function (software support);

    This is three conditions reflected power saving function. Besides, no matter save or not save electricity, it has no sense. If advertise VDF has power saving function when working under power frequency without preconditions, it must be exaggerated or commercial hype, if you know it, you can easily let it service for you. It is important to note the usage occasion and service conditions, so that to use right application, or it is follow blindly, readily believe and fraud.

    Power factor compensation and energy saving

    Reactive power increase the fever of line loss and equipment, what’s more, the decreasing of power factor cause the decreasing of the grid of active power, a large number of reactive power consumption in circuit, equipment efficient is low, and waste is serious, After use frequency conversion device, because the function of filter capacitor which is the inside pats of VDF, reduce the reactive loss and increase the active power of grid.

    Soft starting energy saving

    1.  Hard starting of motors serious impact on power grid and have higher requirement in grid capacity, the big current and vibration which is produced in starting will strong harm the baffle and valve, it is particularly harm the service life of equipment and piping, After use frequency energy saving device, soft starting function of VDF is used to make the starting current start from scratch, the maximum also shall not exceed the rated current, it reduces the impact to the grid and the requirement of power supply capacity, extend the service life of the equipment and valves and save the maintenance charge from equipments.

           2.  Theoretically, VDF can be used in all mechanical equipment with motor, when start the motor, the current will 5-        6 times higher than rated current, it will affect the service life of the motor and consume more power. The system is        design to retain a certain margin in motor selection, the speed of the motor is fixed, but it will working with lower or        higher speed in actual use process, so it is essential to do frequency conversion renovation, VDF can realize the                motor soft star and power factor compensation. 

  • 正在上傳.....
  • 正在上傳.....
螺旋絲杠升降機
SJ系列梯形螺旋絲杠升降機
SJB系列滾珠絲杠升降機
MA系列梯形螺旋絲杠升降機
驅(qū)動馬達
Y2系列三相異步電機
Y2EJ系列電磁制動三相異步電機
Y2B系列防爆三相異步電機
噴灌設(shè)備專用減速電機
減速機
VF系列精密蝸輪減速機
K系列螺旋錐齒輪減速電機
RX系列單級齒輪減速電機
R系列多級減速電機
S系列蝸輪齒輪減速機
F系列平行軸齒輪減速機
TC系列小金剛齒輪減速馬達
TKM HG準(zhǔn)雙曲齒面齒輪減速電機
調(diào)速控制部分
6-250w調(diào)速器和減速馬達
JWB機械無極變速機
精密行星減速機
FCG滾輪柱塞限位開關(guān)
FCP接近限位開關(guān)
換向器
HD系列螺旋錐齒輪換向器
ARA系列小型螺旋錐齒輪換向器
絲桿升降機知識
新購買的行星減速機磨合時期的注
絲桿升降機升不起或上升力弱的根
怎樣減少平面二次包絡(luò)蝸輪減速震
SGA系列螺旋升降機性能特點
主站蜘蛛池模板: 欧美一级片在线免费观看 | 扒开双腿被两个男人玩弄 | 国内揄拍国产精品人妻门事件 | 国产在线观看免费视频软件 | 黄a免费 | 四房播播最新网址 | ririai66在线观看视频 | 中国一级特黄真人毛片 | 91亚洲国产成人久久精品网址 | 狠狠亚洲丁香综合久久 | 日本久久综合视频 | 国产亚洲精品第一综合另类 | 影音先锋资源 av | 国产二区自拍 | 麻豆亚洲精品中文字幕一麻豆 | 九九九九在线视频播放 | 一区二区三区美女视频 | 91情侣在线精品国产免费 | 国产123在线观看 | 附近约妓女软件 | 黄色三级免费看 | 久久免费手机视频 | 久久88香港三级台湾三级中文 | 免费的青榴视频在线观看 | 久久综合视频网 | 人人香蕉 | 一级毛片不卡片免费观看 | 精品国产乱码久久久久久夜深人妻 | 午夜伦理:伦理片 | 国产真实野战在线视频 | 免费无码无遮挡永久色情聊天 | 精品午夜寂寞影院在线观看 | 亚洲国产精品日本无码小说 | 国产成人精品一区二区三区影院 | 三级网址日本 | 99久久www免费人成精品 | 美美哒免费高清影院在线直播 | 99久久精品免费看国产 | 色婷婷色 | 天天操天天舔天天射 | 亚洲成人一区二区 |