Some air-conditioning compressors have two capacitors, a starting capacitor, and a running capacitor. Generally, the capacity of the starting capacitor is large, and the capacity of the running capacitor is small. The wiring diagram is as follows: ...

Metallized film capacitors are capacitors made by using organic plastic films as the dielectric and metalized films as the electrodes. In addition to the winding type, there are also laminated types. The films used in metallized film capacitors include polyethene, polypropylene, and polycarbonate. Among them, polyester film media and polypropylene film media are the most widely used...

When configuring a reactive power compensation device, many people often don't know. How much capacity is needed to configure a reactive power compensation device?
There are two methods to calculate the reactive power compensation capacity:

(1) Estimated according to transformer capacity
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(2) Calculate by looking up the "Reactive Compensation Capacity Calculation Coefficient Table"
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The methods used for reactive power compensation include low-voltage individual compensation, low-voltage centralized compensation, and high-voltage centralized compensation.
1.Individual low voltage compensation
Low-voltage individual compensation is based on the need for reactive power by individual electrical equipment to decentrally connect one or more low-voltage capacitor banks to the electrical equipment in parallel...

1. Nominal capacity: The nominal capacity is the capacity marked on the capacitor.

2. Allowable deviation: the maximum allowable deviation range between the actual capacitance and the nominal capacitance. Generally divided into three levels: level I ± 5%, level II ± 10%, level III ± 20%...

A. Polypropylene (code: PPN or PPS) material has the lowest loss angle, which is suitable for high voltage pulse wave circuit work. PPS material is used above 1KV, PPN material is used below 1KV.

B. Metalized polypropylene (codename MPPN) has a high voltage resistance and is suitable for DC high voltage or AC power circuit work. Those who use the AC power circuit must meet the AC power safety certification and are generally called X2 capacitors...

There are many types of CBB capacitors. There are mainstream models + custom models, and there are even thousands of types. Only a few parameters need to be considered in the selection process...

For example, the electrolytic capacitor with a rated maximum temperature of 85 ° C has a life of 1,000 hours under the ambient temperature of 85 ° C. The ambient temperature is reduced to 60 ° C, and the life can be extended to about 10,000 ° C. When the ambient temperature is reduced to 40 ° C, the life can reach about 80,000 hours...

The film capacitor is a capacitor with a metal foil as an electrode, and it is laminated with a plastic film such as polyethylene, polypropylene, polystyrene, or polycarbonate from both ends and wound into a cylindrical structure. According to the type of plastic film, it is also called polyethylene capacitor (also called Mylar capacitor), polypropylene capacitor (also called PP capacitor), polystyrene capacitor (also called PS capacitor) and polycarbonate capacitor...

CBB capacitors are also called polypropylene capacitors with a capacitance of 10p--10μ. Capacitor derating refers to selecting a product that has a larger rated current than the capacitor when selecting and controlling electrical components. For example, a simple motor control capacitor, the power of the motor is 55KW, and the rated current is about 110A...

Film capacitors can be divided into two categories: DC film capacitors and AC film capacitors: DC film capacitors are film capacitors that work in circuits powered by a DC power supply. It can be divided into four types: general type, power supply electromagnetic interference suppression type, pulse type and thorough type. ...

With the development of science and technology and the maturity of technology, we are constantly improving the quality of our capacitors!...

With the development of technology, many capacitors have become an indispensable part of our daily life. Capacitors will generate heat during continuous operation in a high-temperature environment. It is very important to use capacitors properly...

Capacitors are composed of metal parts and non-metallic parts, so the source of heat is also discussed from these two aspects. This article introduces the heat sources of metallized film capacitors in detail...

Metallized film capacitors are capacitors made of metallized films as electrodes and wound (except for laminated structures). The films used in metallized film capacitors include polyethylene, polypropylene, and polycarbonate. In addition to the winding type, there are also laminated types...

As a film capacitor manufacturer, we have many years of manufacturing experience, and we have always attached great importance to the capacitor inspection procedures. It is very important for customers to receive quality goods, and if there is a problem, it will delay the use. So we take this seriously...

CBB capacitors are also called polypropylene capacitors. Capacitance 10p--10μ, rated voltage: 63--2000V. Can replace most polystyrene or mica capacitors for more demanding circuits. The performance is similar to that of polystyrene, but the volume is small and the stability is slightly poor...

As the pneumonia epidemic of new coronavirus infections continues to spread, more and more research teams around the world are racing to develop the vaccine. According to incomplete statistics, more than 20 new crown vaccine projects at domestic and foreign pharmaceutical companies and research institutes are being developed...

Metallized film capacitors use polyester film or polypropylene film as a medium. Zinc-aluminum alloy is trapped on the surface of the film by a vacuum ingot method to form an electrode, and the capacitor is formed by non-inductive and electrodeless winding or lamination. ...

Metal film capacitor is a layer of metal film directly evaporated on the paper as an electrode, also known as metalized paper dielectric capacitor. The electrode is a thinner metal film than the aluminum foil. This capacitor is characterized by its self-healing effect. ...

The starting of the motor requires a certain accessory, which is the capacitor. Without the starting capacitor, the motor cannot start normally.

The so-called single-phase motor generally refers to a low-power single-phase asynchronous motor powered by a single-phase AC power supply...

Capacitor accuracy mostly refers to the tolerance range of capacity. Why does the accuracy of capacitors exist? ...

The two capacitors of a single-phase dual-value capacitor motor, one is responsible for starting and the other is responsible for operation. This single-phase asynchronous motor has a large starting torque, high power index, small speed change, and low noise during operation...

Capacitors in China: Since the advent of hand-produced metallized film capacitors in the 1960s, China's metallized capacitors have roughly gone through three stages of development.
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Choosing an inappropriate capacitor will affect the circuit and cause unnecessary losses. The following introduces the parameters that should be paid attention to when purchasing thin film capacitors...

The capacitance of a general single-phase motor is designed according to the power of the motor. For example, the starting capacitance of a 1 kW dual-value capacitor motor is between 100-200UF, and the running capacitance is about 30UF...

The start of the motor requires certain accessories, that is, the capacitor. Without the start capacitor, the motor cannot start normally. The capacitance required by different motors is naturally different...

Because the capacity that the capacitor can hold is limited, it is marked with a certain unit. When choosing a capacitor, not only must the capacity be considered, but also the conversion relationship of the capacitor unit must be understood. 》...

The single-phase capacitor AC motor is often used in industrial water pumps, oil pumps, fans, low-power mechanical equipment, etc. due to its small size and light weight. And in civil appliances, such as refrigerators, air conditioners, washing machines, are also widely used...

Shunt capacitor is a kind of power system that is frequently exchanged. Used to increase the power value and improve the quality of the voltage. Can effectively reduce the current consumption in the line...

Taizhou Dingfeng electrical appliance co., LTD. is from China's capacitor city Zhejiang Wenling, 50 percent of the world's capacitors producted from here.Dingfeng began production of capacitors in 1989...

Capacitors are electronic components that store energy. For different needs, the size of the capacity to be selected is different. Can be simply understood as capacity is energy...

In the process of using capacitance, we must pay attention to grasp the measurement method of capacitance. This is the key to identifying good or bad capacitors. So, what are the methods for measuring film capacitance?...

Because of the unique characteristics of CBB capacitors, the scope of application is very wide. CBB capacitors not only can resist high voltage and large current impact, but also have the characteristics of low loss, excellent electrical performance and high reliability. So, where are CBB capacitors suitable for use?...

Cbb capacitors can be roughly divided into: 1. Winding type, 2. Laminated type, 3. Electrolytic type according to their component structure. The electrolytic type is divided into aluminum and tantalum. Aluminum is divided into liquid electrolyte and solid electrolyte...

The capacitor is a complicated thing because it is composed of many basic components. Due to the raw materials and manufacturing process, the capacitor medium produced by many small factories is prone to impurities, mechanical damage, pinholes, and low cleanliness...

The discharge process is the process of discharging the stored charge by the capacitor. When the charging capacitor is in a closed path without a power source, the charge on the negatively charged metal plate will be positively charged under the action of the electric field force...

1. General characteristics parameter selection requirements

(1) Model

Generally used in the circuit for low frequency coupling, bypass decoupling, etc. When the performance requirements are not strict, paper dielectric capacitors and electrolytic capacitors can be used...

The accuracy of the capacitor mostly refers to the error range of the capacity. Why does the accuracy of the capacitor exist? This is because the capacitor produced will always have a certain error from the original specified capacity...

Running capacitance: it is to form an alternating magnetic field by connecting the alternating current to the secondary winding after phase shifting...