Lynch motor

The Lynch motor is a unique axial gap permanent magnet brushed DC motor invented by Cedric Lynch, U.S. patent 4823039 amongst others cover the motor and its construction. The motor was then developed in to a production item by Cedric 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. Because the flux passes through the laminations along one axis only, it became possible to take advantage of grain-oriented material normally used in large transformers. 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 LEMCO. In 1989 four of them powered the boat " [http://www.electricrecordteam.com/ 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 batteries 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.

The Lynch Electric Motor Company (LEMCO) continued to manufacture motors and now trades under the name of LMC The Lynch Motor Company " [http://www.lmcltd.net/ LMC Website] " which now owns the Lynch IP company and therefore all rights and patents pertaining to the motor.

Recent Projects undertaken using the Lynch motor include the ENV fuel cell motorcycle " [http://www.envbike.com/ ENV Website] " and the Orange Juice electric dragster with its unique four wheel drive unit " [http://www.paradefloats.com/pages/orangejuice2.html/ Orange Juice Site] " . A video of Orange Juice running with a lithium battery pack can be seen here " [http://www.youtube.com/watch?v=eynb6zT4LMs Video] "

Patent 4823039

Other Patent covering the motor include;

USA 6040645
[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=6040645.PN.&OS=PN/6040645&RS=PN/6040645]

France number 0736232

Germany number 69419528.6

Great Britain number 0884826

Great Britain number 0736232

Japan number 3120083

Switzerland number 0736232

USA number 6459179 [http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=6459179.PN.&OS=PN/6459179&RS=PN/6459179]

Europe number 98114008.0 (CH, DE, FR, GB, LI, (IT)

ee also