Capacitor Definition

Capacitor is an electromechanical device capable of storing electrical energy (electrons). It differs from a battery, as a battery produces electrical energy as a by-product of chemical activity. A capacitor can function in a circuit like a battery. Or a resistor, or an inductor, for that matter. It can also absorb energy, turning some into heat.

A farad of capacitance is a lot of capacitance. In high voltage, we generally deal in microfarads (mfd.) or picofarads (pf) which are one millionth of a farad and one millionth of 1 millionth of a farad, respectively. Infrequently used, a nanofarad is one thousandth of a microfarad.

condensadores polipropileno metalizado X2

jb compañía condensadores producir  condensadores X2 película con UL, aprobaciones VDE. ampliamente utilizado en la central de medida,
el poder de proveedores y aplicación de la luz.
 
JFN--condensador de película de polipropileno metalizado
Hoja de datos: http://www.jbcapacitors.com/pdf/JFN-X2-Metallized-Polypropylene-Film-Capacitor-8-approvals.pdf
Cruz Arcotronics R46, Epcos B81130, Vishay MKP3382, Wima MP3, Panasonic ECQU.
corto plazo de tiempo: unos 6 ~7 semanas

电容降压工作原理简介

电容降压的工作原理并不复杂。他的工作原理是利用电容在一定的交流信号频率下产生的容抗来限制最大工作电流。

例如,在50Hz的工频条件下,一个1uF的电容所产生的容抗约为3180欧姆。当220V的交流电压加在电容器的两端,则流过电容的最大电流约为70mA。虽然流过电容的电流有70mA,但在电容器上并不产生功耗,因为如果电容是一个理想电容,则流过电容的电流为虚部电流,它所作的功为无功功率。

根据这个特点,我们如果在一个1uF的电容器上再串联一个阻性元件,则阻性元件两端所得到的电压和它所产生的功耗完全取决于这个阻性元件的特性。例如,我们将一个110V/8W的灯泡与一个1uF的电容串联,在接到220V/50Hz的交流电压上,灯泡被点亮,发出正常的亮度而不会被烧毁。因为110V/8W的灯泡所需的电流为8W/110V=72mA,它与1uF电容所产生的限流特性相吻合。同理,我们也可以将5W/65V的灯泡与1uF电容串联接到220V/50Hz的交流电上,灯泡同样会被点亮,而不会被烧毁。因为5W/65V的灯泡的工作电流也约为70mA。

因此,电容降压实际上是利用容抗限流。而电容器实际上起到一个限制电流和动态分配电容器和负载两端电压的角色。

采用电容降压时应注意以下几点:

  • 1.根据负载的电流大小和交流电的工作频率选取适当的电容,而不是依据负载的电压和功率。
  • 2.限流电容必须采用无极性电容,绝对不能采用电解电容。而且电容的耐压须在400V以上。最理想的电容为铁壳油浸电容。
  • 3.电容降压不能用于大功率条件,因为不安全。
  • 4.电容降压不适合动态负载条件。
  • 5.同样,电容降压不适合容性和感性负载。
  • 6.当需要直流工作时,尽量采用半波整流。不建议采用桥式整流。而且要满足恒定负载的条件。

以上是电容降压工作原理的简单介绍。其实电阻、电容和电感作为电子电路的基本元件,熟知它们的特性并灵活地应用它们是非常重要的。

CBB60 motor starting film capacitors

JB capacitors sell very good quality and price for CBB60 motor starting film capacitors.

Especially for JFS-12, JFS-13, JFS-17 &JFS-18 series. Very popular with East Europe.

CBB60 motor starting film capacitors

jb Main Products

JB конденсаторы сосредоточиться на алюминиевых электролитических конденсаторов типа стандартных SMD с 1980 года, высокое качество с самым лучшим ценой.

Многие свободные руки автопроизводителей телефон купить от JB.

  • JCS --Алюминиевый электролитический конденсатор SMD типа 2000h на 85C
  • JCK-- Алюминиевый электролитический конденсатор SMD типа 1000h на 105C

Перекрестная ссылка: Nichicon, Rubycon, Panasonic, Sanyo, Элна ....

Время: около 6 ~ 7 недель

JB capacitors produce very high quality Screw terminals Aluminum electrolytic capacitors

Quality and price is very good ! Lead time is also fast ! Many welding machines manufacturers buy from JB.

  • JMJ - 2000H at 85°C, Miniaturized, Screw Aluminum Electrolytic Capacitor
  • JML - 2000H at 105°C Screw Aluminum Electrolytic Capacitor
  • JMN - 5000H at 85°C Screw Aluminum Electrolytic Capacitor
  • JMQ - 5000H at 105°C Screw Aluminum Electrolytic Capacitor

JB Capacitors Company produce 2 series axial lead film capacitors, JFG & JFX

JFG series mainly used for loudspeakers,amplifier & power supply while JFX used for high-end audio products, JFX has equivalent quality with many famous brand audio capacitors, such as V-cap, Jensen, Auricap, Erse. We have very good price, high quality,fast shipment & excellent service.

  • JFG - Metallized Polyester & Polypropylene Film Capacitor - Axial Lead, Round & Flat oval type.
  • JFX - Premium Metallized Polypropylene Film Capacitor - Axial Lead

JCS - 2000H at 85°C SMD Aluminum Electrolytic Capacitor

jb Capacitors manufactures and markets SMD Aluminum Electrolytic Capacitor. 2000 hours at 85°C Chip Aluminum Electrolytic Capacitor is one of the most common series. We sell quite good prices, high quality and with short lead time. Following are 85°C SMD Aluminum Electrolytic Capacitor features, specifications and drawing.

JCS - 2000H at 85°C SMD Aluminum Electrolytic Capacitor Features

  • Designed for surface mounting on high density circuit board.
  • Emboss carrier tape packing system is available for automatic insertion.

JCS - 2000H at 85°C SMD Aluminum Electrolytic Capacitor Parameters download PDF files

JSW - Lug Aluminum Electrolytic Capacitor, for Motor Starting

jb Capacitors manufactures and markets Lug Aluminum Electrolytic Capacitor, for Motor Starting, which widely used for the compressor starter of a refrigerator and air-conditioner and for the water pumps. Following are Lug Aluminum Electrolytic Capacitor features, specifications and dimensions.

JSW - Lug Aluminum Electrolytic Capacitor (for Motor Starting) Features

  • Load life of 75000 times and 30000 times
  • For motor starting
  • Used for the compressor starter of a refrigerator and air-conditioner and for the water pumps

JSW - Lug Aluminum Electrolytic Capacitor (for Motor Starting) Parameters download PDF files

jb Mylar Polyester Film Capacitor - JFA

jb Capacitors produce Mylar Polyester Film Capacitor with very competitive prices. Mylar capacitor is available in high voltage 1000V and 1200V, also high temperature 105° C and 125°C. Mylar Polyester Capacitor is widely used in lighting and lamps. Following are Mylar Polyester Film Capacitor features, specifications and drawing.

JFA - Mylar Polyester Film Capacitor Features

  • Inductive welded construction epoxy dip coated.
  • Good reputation in use with consumer & industrial electronics.
  • Optimum for automatic insertion due to their small size and light weight.
  • Coated with epoxy resin for superior heat resistance, humidity resistance and solvent resistance.

JFA - Mylar Polyester Film Capacitor Parameters download PDF files

JFA - Mylar Polyester Film Capacitor Specifications

Operating Temperature -40°C~ +85°C JFA - Mylar Polyester Film Capacitor
Rated Voltage 100V, 250V, 400V, 630V, 1000V.DC
Capacitance Range 0.001 ~ 0.47μF
Capacitance Tolerance ±5%, ±10%, ±20%
Insulation Resistance 0.1μF ≤30,000MΩ min, >0.1μF >15000MΩ
Dissipation Factor ≤0.1 (at 1KHz)
Dielectric Strength 200% of rated voltage for 5 sec.

JFA - Mylar Polyester Film Capacitor Drawing