High performance NdFeB
1. High-performance NdFeB mainly include:
Hcj (kOe) + (BH) max (MGOe)> 60, for the production of small, micro-special purpose permanent magnet motor, sensors, magnetic resonance, advanced audio and video equipment, such as sintering NdFeB
(BH) max80-120kJ / m3 bonded NdFeB made by pressing method and injection method;
In recent years has just developed high-performance hot-pressing NdFeB.
2. High-performance NdFeB industry upstream and downstream industry chain:
Heavy rare earth smelting industry
Light Rare Earth Smelting
Pure iron manufacturing
Energy and power industry
High performance NdFeB manufacturers
Electronic products (VCM, mobile phones, disk drives)
Inverter air conditioner
Energy efficient elevator
new energy vehicles
High performance NdFeB downstream applications accounted for
Voice coil motor (VCM)
1. What is VCM?
The voice coil motor (VCM) is a special form of direct drive motor that converts electrical energy directly into linear motion machinery for magnet for Mechanical
can. The principle is in a uniform air gap into a cylindrical winding, winding power generated by the electromagnetic force to drive the load for the linear reciprocating motion, change the strength and polarity of the current, you can change the size and direction of electromagnetic force.
VCM has the advantages of high response, high speed, high acceleration, simple structure, small size, good force characteristics and convenient control. VCM is mostly used as a disk head in hard disk drive (HDD), which is an important core component of HDD.
Hard disk field
2. Mechanical hard disk VS solid state hard drive
Mechanical hard disk market space is being squeezed. Global mechanical hard disk shipments in 2015 was 469 million units, down 17% year on year. In recent years, mechanical hard disk shipments steady decline, mainly due to solid-state hard drive in recent years is gradually eroding the market share of mechanical hard drives. But the mechanical hard drive because of its security and low cost advantage, the future for a long period of time is difficult to completely replace the solid-state hard drive.
Contrast Mechanical Hard Disk (HDD) Solid State Drive (SDD)
Working principle rotating disk + head flash particles
Read and write speed 66-133M / s 150-600M / s
Long service life is short
Running sound 35db no
Heat generation 32-35 ℃ 28-30 ℃
Data recovery can be recovered by software without software recovery
Price of 350 yuan / T 2,700 yuan / T
VCM industry interpretation
Is expected in the next few years, the overall trend of mechanical hard disk ship continued to show a downward trend. We are on the HDD shipments and their high
Performance neodymium iron boron demand to make predictions. The key assumptions are:
1 Assuming 2016-2018, hard drive shipments of CAGR are -2%;
2 Assume that each hard drive uses high performance NdFeB for 10 grams. The demand for iron and boron for automotive micro-motors in 2016/17/18 was 1,654 / 1,621 / 1,589 tons, respectively, and the average annual compound growth rate was -2%.
VCM is NdFeB high-end applications, the technical threshold is higher, long-term monopoly by the developed countries. Japan is the largest amount of VCM, accounting for about 50% of production.
To master the technology are the following enterprises, accounting for more than half of the global market share: