Newton Derby is a main supplier of Permanent Magnet Generators (PMGs) to the major European manufacturers of large Synchronous Generators and Motors. These PMGs have been developed to provide excitation supplies for the exciter field systems of larger rotating machines that operate at continuous speeds of up to a maximum of 3600 rpm
Newton Derby prides itself on the quality of its design and development skills, enabling the company to offer special equipment for the most demanding applications, in addition to its established product range.
Newton Derby has produced permanent magnet generators for a variety of applications, including oil, gas, and hydro power. Our PMGs can be used as an independent supply, or as a brushless excitation supply for the field system of large rotating machines. The magnets used on our PMGs can be either AlNiCo, or rare earth neodymium. Rare earth magnets are now our preferred choice, as they allow us to reduce the size of the PMG and are extremely resistant to demagnetisation in the event of a short circuit fault.
The Rotor is directly mounted on the shaft of the main generator or motor usually by means of a shrink-fit and key. The PMG stator housing is usually foot or flange mounted into the enclosure of the main machine.
Directly mounted on the shaft end of the main generator or motor without the need for a flexible coupling or adaptor. The PMG stator housing is prevented from rotating by a flexible mount fixed to its underside.
These can be supplied for the customer to mount on the base frame and couple to the parent machine.
Supplied for mounting onto the end of the parent machine via direct flexible coupling, these can be supplied to suit the customer’s own requirements.
Newton Derby manufactures a large range of Permanent Magnet Generators in a variety of speeds and sizes to suit any application. Bespoke design solutions are our speciality.