Permanent Magnet Used in Motor of Windscreen wiper 20191031

Windscreen wiper is mainly used to clean the rain or snow on windshield and make sure range of vision of driver is clear in rainy or snowy days.

Driven by electric motor, windscreen wiper is consisted of retarder, wiper switch, linkage and blade.
The left and right blades of the windscreen wiper are pressed on the windscreen by wiper’s arms. Electric motor turns the retarder and drives the linkage to reciprocate which would put the arms of wiper and blade in motion. Thus, the windshield is cleaned.

Electric motor (electric motor of wiper) can be classified according to their magnetic field. There are permanent magnet motor and electromagnetic motor.
Structure of permanent magnet motor used in windscreen wiper

Permanent magnet motor has long been in common usage as its magnetic pole is permanent magnet, normally is ferrite magnet. Small, light and simple and cheap, those are advantages of permanent magnet motor. So this kind of motor is widely used in cars.

Tags: permanent magnet, motor magnet

What kinds of rotor permanent magnets are inside servo motors?

What are the internal rotors of servo motors?
The internal rotors of servo motors are permanent magnets. The so called permanent magnets refer to those magnets that have unchanged magnetic poles and magnetic field strength. Servo motors mainly used arc magnets, just as below pictures:

Here is some information of servo motors magnets.
1、Do the rotor magnets of servo motors need adhesive?
The rotor magnets must need adhesive. There are many types of adhesive, such as KR series of high temperature resistant adhesive, AB adhesive and so on.
2、Why can't we use electromagnets to replace permanent magnets as the rotors?
Some netizens might reply that the electricity needs money, and in a finite electricity and space, the magnetic fields that can be generated are not necessarily stronger than the permanent magnets.
3、What magnets are the hard disc head servo motors use?
The hard disc head servo motors are voice coli motors, which are the same as general permanent magnet synchronous motors; the magnetic material is rare earth permanent magnets NdFeB.

The servo driver controls the U/V/W three-phase electricity forming an electromagnetic field, and the rotor rotates under the action of this magnetic field. At the same time, motor built-in encoder feedback signal to the driver, the driver will compare the target value according to the feedback value, so as to adjust the angle of the rotor rotation. The precision of servo motor depends on the precision of encoder (line number).
PS: When the servo motor is working, it should avoid the entering of oil and water. Because the servo motor is not the fully waterproof equipment, it is not suitable to put it in the water or oil environment. While connecting to the reduction gear, users should pay attention to prevent the oil of reduction gear from entering the motor, as well as preventing cables from oil and water.

Professionalism makes the future, success accompanies you and us. Our company is specialized in manufacturing hall sensor magnets, motor permanent magnets, irregularity magnets, multi-poles injection magnet rings, etc. If you have any demand for magnets, welcome to contact our company—China Rare Earth Magnet Limited.

Tags: permanent magnet, motor magnets

what are one-side permanent magnets?

Are you wondering what one-side magnet is? Here to introduce the one-side magnets.

The Introduction of One-side Magnets
Permanent Magnets have two poles, but in some specific working positions a single-pole magnet is needed. So we need to encase one side of magnet by metal plates, in order to shield the magnetism of that side. And strengthen the magnetism of the other side through the refraction of metal plates. These magnets are collectively known as one-sided magnets. But actually, the real one-sided magnets don’t exist.

The Material of One-side Magnets
The material used for one-side magnets is neodymium rare earth magnets. Most of the one side magnets are disc shapes.

The Application of One-side Permanent Magnet
1、One-side magnets are widely used in presswork industry. There exist one-side magnets in gift boxes, phone boxes, tobacco and wine boxes, MP3 boxes and moon cake boxes, etc.
2、They are also widely used in leather industry, such as bags, suitcases, briefcases, traveling bags, cell-phone cases, wallets and so on.
3、In Stationery industries, one side magnets are used in notebooks, white boards, folders, and magnetic name badges.

The Purchasing Considerations of One-side Magnets.
The manufacture of one-side magnets is to artificially put the neodymium magnets into the metal plates. So it will take a pretty long time to produce. Customers who want to purchase should place the order in advance.

There are many specifications of one-side magnets. China Rare Earth Magnet limited can customize the magnets according to your requirements. Please send e-mail to us if you have any demand for magnets.

Tags: permanent magnet