Permanent Magnet Motor

Manufacturer & Exporter of Permanent Magnet Motor. Our product range also comprises of Permanent Magnet Generator, Emergency Overspeed Governor.

Since our establishment, we have become the well-known manufacturer and supplier of a highly efficient Permanent Magnet Motor. In well-organized manner, these magnet motors are manufactured using better quality material that is sourced from the recognized vendors of the market. To ensure high performance and unmatched quality of this range, it is examined well against numerous quality parameters by our experts.

Features:

• Energy efficient
• Long service life
• Easy maintenance

Product Descriptions:

There was 185% PM brushless motor market growth between 2008 and 2011 in comparison with 29% overall motion control market growth in the same period of time.

The use of permanent magnets (PMs) in construction of electrical machines brings the following benefits:

• No electrical energy is absorbed by the field excitation system and thus
• There are no excitation losses which means substantial increase in efficiency
• Higher power density and/or torque density than when using electromagnetic excitation
• Better dynamic performance than motors with electromagnetic excitation (higher magnetic flux density in the air gap)
• Simplification of construction and maintenance
• Reduction of prices for some types of machines

In the last two decades new topologies of high torque density PM motors,high speed PM motors, integrated PM motor drives, and special PM motors have gained maturity. Cage induction motors have been the most popular electric motors in the 20th century. Recently, owing to the dynamic progress made in the field of power electronics and control technology, their application to electrical drives has increased. Their rated output power ranges from 70 W to 500 kW, with 75% of them running at 1500 rpm. The main advantages of cage induction motors are their simple construction, simple maintenance, no commutator or slip rings, low price and moderate reliability. The disadvantages are their small air gap, the possibility of cracking the rotor bars due to hot spots at plugging and reversal, and lower efficiency and power factor than synchronous motors.

The use of PM brushless motors has become a more attractive option than induction motors. Rare earth PMs can not only improve the motor's steady state performance but also the power density (output power-to-mass ratio), dynamic performance, and quality. The prices of rare earth magnets are also dropping, which is making these motors more popular. The improvements made in the field of semiconductor drives have meant that the control of brushless motors has become easier and cost effective, with the possibility of operating the motor over a large range of speeds while still maintaining good efficiency.

A PM brushless motor has the magnets mounted on the rotor and the armature winding mounted on the stator. Thus, the armature current is not transmitted through a commutator or slip rings and brushes. These are the major parts which require maintenance. A standard maintenance routine in 90% of motors relates to the sliding contact. In a d.c. commutator motor the power losses occur mainly in the rotor which limits the heat transfer and consequently the armature winding current density. In PM brushless motors the power losses are practically all in the stator where heat can be easily transferred through the ribbed frame or, in larger machines, water cooling systems can be used. Considerable improvements in dynamics of brushless PM motor drives can be achieved since the rotor has a lower inertia and there is a high air gap magnetic flux density and no-speed dependent current limitation.

http://permanentmagnetgenerator.net
pmgenerator2014@gmail.com
Mr. Gurmit Singh
+91-9811980116
F-2636 Palam Vihar
Gurgaon-122017
India