The
Lynch motor is a unique axial gap permanent magnet
brushed DC motorA brushed DC motor is an internally commutated electric motor designed to be run from a DC power source.-Simple two-pole DC motor:The following graphics illustrate a two-pole DC motor....
invented by Cedric Lynch. United States patent 4823039 amongst others cover the motor and its construction. The motor was developed in to a production item by Cedric Lynch and Trevor Lees in the early 1990's.
In this motor the iron laminations are rectangular, which made it possible to have them commercially made from material intended for this purpose without the expense of a special stamping tool.
The
Lynch motor is a unique axial gap permanent magnet
brushed DC motorA brushed DC motor is an internally commutated electric motor designed to be run from a DC power source.-Simple two-pole DC motor:The following graphics illustrate a two-pole DC motor....
invented by Cedric Lynch. United States patent 4823039 amongst others cover the motor and its construction. The motor was developed in to a production item by Cedric Lynch and Trevor Lees in the early 1990's.
Description
In this motor the iron laminations are rectangular, which made it possible to have them commercially made from material intended for this purpose without the expense of a special stamping tool. Because the
fluxMagnetic flux, represented by the Greek letter Φ , is a measure of quantity of magnetism, taking into account the strength and the extent of a magnetic field...
passes through the laminations along one axis only, it became possible to take advantage of grain-oriented material normally used in large
transformerA transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer's coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core, and thus a varying magnetic field...
s. This has much better magnetic properties along the grain orientation but worse properties in other directions, so in the traditional type of motor it gives little or no benefit.
This motor went into small-scale production in 1988 with the firm London Innovation and later with the Lynch Electric Motor Company (LEMCO) . In 1989 four of them powered the boat "
An Stradag", driven by the Countess of Arran, to a world record speed for an electric boat of just over 80 km/h (50 mph). The motor was adopted by the Swiss company ASMO for use in its electric go-kart drive systems. Its efficiency extends the life of the
batteriesAn electrical battery is a combination of one or more electrochemical cells, used to convert stored chemical energy into electrical energy. Since the invention of the first Voltaic pile in 1800 by Alessandro Volta, the battery has become a common power source for many household and industrial...
and so improves the economics of running an electric karting track.
The patents and license rights for the manufacturing of the Lynch motor are held by the Lynch IP company, which has sold a license to Briggs and Stratton to manufacture the ETEK motor.
LEMCO continued to manufacture motors and now trades under the name of LMC (Lynch Motor Company) "
LMC Website" which now owns the Lynch IP company and therefore all rights and patents pertaining to the motor.
In 2009, Cedric Lynch appears to have parted company with LMC and is working for Agni Motors
Agni Motors Website which is producing similar motors.
Recent projects
Recent projects undertaken using the Lynch motor include the ENV fuel cell motorcycle "
ENV Website" and the Orange Juice electric dragster with its unique four wheel drive unit "
Orange Juice Site" . A video of Orange Juice running with a lithium battery pack can be seen here "
Video"
On 12th June 2009, Rob Barber won the inaugural
Manx TTxGP on an Agni Motors bike powered by an Agni motor, and improved version the original Lynch motor.
Patent 4823039
Other Patent covering the motor include;
USA 6040645