jbcapacitors blog

Today we would like to share a piece of capacitance testing lesson with all of our jb customers.

Customer Sent: Thursday, July 09, 2015 6:48 PM
We received the capacitors from you and all cartons are ok, thank you.
First of all I want to thank you for the samples and gifts that you sent, I appreciate your kindness.
I checked all models of motor capacitors to see if they have the right capacity value.
The models between 10u and 80u have the right capacity, many models have 2-3% bigger capacity than rated, this is very good.
For example, 30uF has in fact 31uF.

The problem is with the models 100uF and 120uF.
100uF has in fact around 91uF; 120uF has in fact around 101uF

I would like to know why these models have such a low capacity.
I didn't expect to have such differences, I consider jb Capacitors to be a big factory with good quality.
It is important to know, I hope that next time we can find a solution to make these models with the rated capacity.

jb Capacitors Response: Thursday, July 13, 2015 12:45 PM
Before goods leaving our factory, we did all necessary electrical performance test & inspect, totally 3 times.
we made a JFS-15 100uF capacitor test with HF2618 instrument, a professional instrument for capacitance test.

Customer Sent: Thursday, July 16, 2015 5:48 PM
I am very glad to tell you that we tested the motor capacitors 100u and 120u with an oscilloscope that can also measure capacitance and the result is positive, the capacitors have indeed around 100u and 120u.
There is no problem to measure capacitors less than 100u with this general multimeter 9205, but for bigger capacitors we need indeed to use a professional instrument.
So I am glad that there is no problem with these capacitors from you. We are planning our next order very soon.http://www.jbcapacitors.com/

Do you know our Motor Capacitors CBB60~CBB65 can used in widely applications? Let us tell you. 

It can be widely used in Water Pump, Air Compressor, Cleaning Machine, Motors, Washing 
machine, Electric fan, Air conditioner, Fridge and Inverter welder..... 

We can make in CE, UL, RoHS standard and safety and stability as customers require. 
Low D.F., lower temperature rise, Durability and characteristics of frequency, smaller MOQ. 

Please check our products link: http://www.jbcapacitors.com/pdf/JFS-Motor-Capacitor.pdf for more info. 

Last time, we introduce you our upgraded catalog and datasheet. This time, we would like to have your attention for below two totally new leaflets.

JFS Motor Capacitors: jb CBB60 plastic case cylindrical JFS-10~21 capacitors with UL and cUL approvals. UL No: E476294
Radial SMD E Cap: JRA - 85°C Radial Aluminum Electrolytic Capacitor , JRB - 105°C Radial Aluminum Electrolytic Capacitor

Please contact with your account manager, free leaflets are at your disposal. Below is the online link for your easy view.

http://www.jbcapacitors.com/pdf/jb-Motor-Capacitor-Leaflet.pdf
http://www.jbcapacitors.com/pdf/jb-Radial-Electrolytic-Capacitors-Leaflet.pdf

★ Motor Capacitors 

AC induction motors, also known as asynchronous motors, use a rotating magnetic field to produce torque. 
Three-phase motors are widely used because they are reliable and economical. 
The rotating magnetic field is easily achieved in three-phase asynchronous motors because the phase angle offset between the individual phases is 120 degrees. 
However, single-phase AC motors require external circuitry which creates the phase angle offset in order to produce a rotating magnetic field. 
This circuitry can be realized using advanced power electronics, or more simply using a motor capacitor.

★ Widely Applications

Motor start and run capacitors are used in single-phase AC induction motors. 
Such motors are used whenever a single-phase power supply is more practical than a three-phase power supply, such as in domestic appliances. 
They are not as efficient as three-phase AC induction motors, however. 
In fact, single-phase AC motors are 2 to 4 times less efficient than three-phase AC motors, which is why they are used only for less powerful motors. 
Typical applications which utilize start and run motor capacitors include power tools, washing machines, tumble dryers, dishwashers, vacuum cleaners, air conditioners and compressors.

From jb Capacitors Company

I wish you have a happy, healthy & wealthy new year 2015! 
In this new year, I bring you new opportunity for capacitors business, please check below our motor capacitors, are you interested in?  

JFS- Motor Capacitors--More than 30 types, 250VAC, 400VAC,450VAC, etc...

We can support you: 
l Competitive prices to win more market shares; 
l Flexible quantity to testing the market at beginning; 
l Reliable and stable quality; 
l free samples for testing; 
l short delivery and also can help you check the cheapest freight charge...

Notice:  jb sales team will work as normal during Chinese Spring Festival, 
welcome to send any your request of capacitors, we will give you the fastest response!

Since jb launched our strong product JFS motor starting capacitors this year, we get lots of good feedbacks on price, quality as well as delivery time.
On our booth of electronica 2014 in Germany on last week, our JFS samples are quickly sent out to different potential customer.

The JFS products on our website are normal type. We also are capable of producing some special types.
Below is a good sample of our jb JFS-24 Motor Capacitors with STUD in the bottom. We also can produce oval types.
If you have other special request for JFS motor starting capacitors, please try to contact us anytime.
www.jbcapacitors.com/Plastic-Film-Capacitors/JFS-Motor-Capacitor.html