INTRODUCTION

TGD Power Magnets is our own brand of magnet.  There is no single magnet factory that manufactures the large range of magnets which we supply.  We import from various manufacturers throughout the World and only deal with magnet factories which we have visited and, at first hand, have approved their production and processing.  We are, thereby, able to establish and maintain a consistently high quality of magnet.  Some of our supplying factories are large, whilst others are small makers of speciality magnets.  Many are ISO certified.  When you purchase TGD Power Magnets you can buy with confidence backed by over 28 years experience.

The purpose of this Magnet List is not to provide details of magnetic theory or terms, as this is a complex subject.  Today there are many magnetic materials available, each with different characteristics and costing, so this Magnet List is structured to give the salient evaluation factors for each magnet material to assist users to select the best permanent magnet for a given application.

MAGNETIC CIRCUITS

The basic purpose of any magnet is to store energy or convert energy from one form to another.  The design of permanent magnet circuits is complicated by many factors, two of which are (1) the elusive qualities of flux and (2) equal volumes of magnetic material will produce different amounts of flux depending on their shape.  Successful designs are often as a result of "hands-on trial and error" tests to select the magnet which yields optimum results.

CATEGORIES OF PERMANENT MAGNET APPLICATIONS

Permanent magnet applications can be divided into five categories, viz:

1.        Applications that make use of the attractive or repelling force of the magnet, i.e. the attraction between a magnet and a soft magnetic material such as a piece of iron, or the attraction or repulsion between two magnets is used to do mechanical work; examples being:

a)       Magnetic separators, magnetic holding devices such as magnetic latches

b)       Magnetic torque drives

c)       Magnetic bearings

2.        Applications that make use of the magnetic field to convert mechanical energy to electrical energy; examples being:

a)       Magnetos

b)       Generators and alternators

c)       Eddy current brakes

3.        Applications that make use of the magnetic field of the magnet to convert electrical energy to mechanical energy;  examples being:

a)       Motors

b)       Meters

c)       Loudspeakers

d)       Relays

4.        Applications that use the magnetic field of the magnet to direct, shape and control electron or ion beams; examples being:

a)       Magnetic focused cathode ray tubes such as TV and computer screens

b)       Travelling wave tubes

c)       Magnetrons, BOW's and klystrons

d)       Ion pumps and cyclotons

e)       Magnetic resonance M.R.I.

5.        There are applications and usage of magnets which are difficult to define or quantify:

a)       Human and animal health applications

b)       Water softening devices

c)       Water conditioning apparatus

d)    Fuel improvement devices