ZJSHUYI Everything you need to know about inverters.www.shuyitop.com; #...

As we all know, the inverter is a refined machine composed of multiple electrical components. Because the multi-style and rich accessories bring many different characteristics to the inverter, what basic knowledge points do you need to know about the inverter? 1. What is the difference between PWM and PAM PWM is the abbreviation of Pulse Width Modulation (Pulse Width Modulation) in English. It is a modulation method that changes the pulse width of the pulse train according to a certain rule to adjust the output and waveform. PAM is the abbreviation of Pulse Amplitude Modulation (Pulse Amplitude Modulation) in English. It is a modulation method that changes the pulse amplitude of the pulse train according to a certain rule to adjust the output value and waveform. 2. How does the torque of the motor change when V and f are changed proportionally? When the frequency drops, the voltage is completely proportionally reduced, then the AC impedance becomes smaller and the DC resistance remains unchanged, which will cause the torque generated at low speeds to have a tendency to decrease. Therefore, given V/f at low frequency, it is necessary to increase the output voltage to obtain a certain starting torque. This compensation is called enhanced starting. It can be achieved by various methods, such as automatic method, selection of V/f mode, or adjustment of potentiometer. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #INVERTER #frequencyinverter #frequencyconverter #converter #inverters #vfds #softstartermarket #softstarterprice #vfdmarket

评论

发表评论

此博客中的热门博文

ZJSHUYI How to choose the inverter.www.shuyitop.com; #frequencyinverter ...

图片
First of all, when selecting an inverter, the power of the motor should be the basic principle. The rated capacity of the inverter is generally marked with KW and current. Under normal circumstances, when selecting an inverter, the corresponding three-phase general-purpose inverter is selected based on the rated KW of the motor. For example: fans, pumps and other equipment. Generally, when selecting a motor of grade 6 or above, it needs to be properly enlarged. The load needs to be controlled by a motor with a reducer, and the power of the inverter needs to be appropriately amplified. For example: cranes, coal mine winches and other equipment. The selection of the inverter should also be based on the load characteristics. If it is applied to frequent startup, the instantaneous current fluctuates greatly, or the load is heavy, the inverter with one or two gears larger can be selected. For example: sand making machine, ball mill and other equipment. When the occasion used for control is
阅读全文

ZJSHUYI Talk about three dual power supply configuration schemes. www.sh...

图片
(1) If the two power sources are installed in the same place and share the same low-voltage power distribution cabinet, a four-pole switch shall be used for the incoming circuit or the switching circuit of the dual power sources. (2) The dual-circuit distribution transformers serve as backup power sources for each other, or the transformers and diesel generators serve as backup power sources for each other, and the neutral points of the transformers and generators are directly grounded nearby. If two sets of power supplies share a low-voltage power distribution cabinet, the incoming circuit should use a four-pole switch (3) If the two sets of power supplies are in the same room (common ground), but do not share low-voltage power distribution cabinets, the power transfer switch in the secondary power distribution equipment can be a three-pole switch Web: www.shuyitop.com; Tel/Fax: 0086-577-62840011 Wechat/WhatsApp: 008613355775769 #ZJSHUYI #Chinashuyi #shuyitop #swtiches #Dualpower
阅读全文

ZJSHUYI Do you know what is a fire control cabinet? www.shuyitop.com; #S...

图片
Fire control cabinet (automatic control cabinet) is a kind of industrial control equipment that is more common in our lives, such as corridors, underground parking lots, gas stations and other public places. However, many friends do not know what it is called or what it is used for. The following ZJSHUI editor will explain what is a fire control cabinet. The fire control cabinet is a safe fire fighting tool provided by the pump factory. Its main purpose is to protect the pump motor from overvoltage, short circuit and overload. And also has a sound and light alarm function. It plays an important role in extinguishing fire and is also a fire safety device that can help control the fire after a fire occurs. There are many ways to start the control cabinet, including direct start, soft start, star-delta start, auto-coupling start, etc. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #ZJSHUYI #Softstartcabinet
阅读全文