Mag­net­ic wedges in elec­tric motors — small com­po­nents, big effect

In elec­tri­cal dri­ve tech­nol­o­gy, small com­po­nents often deter­mine the per­for­mance and ser­vice life of entire sys­tems. We at AMD GmbH know this: Mag­net­ic wedges, also known as wedge strips or slot wedges, are a cen­tral ele­ment in many elec­tric motors — whether in indus­tri­al appli­ca­tions, elec­tro­mo­bil­i­ty or in the field of renew­able ener­gies. As a spe­cial­ist in insu­la­tion mate­ri­als and com­pos­ite mate­ri­als, we offer tech­ni­cal­ly sophis­ti­cat­ed solu­tions — made from both plas­tic-based and metal­lic mate­ri­als.

What do mag­net­ic wedges do in the engine?

Mag­net­ic wedges are placed in the slots of the rotor or sta­tor, where they per­form sev­er­al crit­i­cal func­tions:

1. Fix­a­tion of wind­ings or per­ma­nent mag­nets: They reli­ably pre­vent slip­page or loos­en­ing under high speeds and mechan­i­cal loads.
2. Elec­tri­cal insu­la­tion (for plas­tic ver­sions): They pro­tect against short cir­cuits and ensure safe, low-loss pow­er trans­mis­sion.
3. Mechan­i­cal sta­bi­liza­tion: They increase the struc­tur­al integri­ty of the engine and con­tribute to long-term oper­a­tional reli­a­bil­i­ty.

Plas­tic-based mag­net­ic wedges (GRP / ther­mosets)

Our insu­lat­ing mag­net­ic wedges made of glass fiber-rein­forced plas­tics or ther­moset com­pos­ite mate­ri­als offer numer­ous advan­tages — espe­cial­ly for appli­ca­tions with high ther­mal and elec­tri­cal require­ments:

1. Elec­tri­cal­ly insu­lat­ing — ide­al for pre­vent­ing wind­ing short cir­cuits
2. Tem­per­a­ture resis­tant up to 180 °C
3. Com­pat­i­ble with insu­la­tion class­es F and H
4. High mechan­i­cal strength and fatigue strength
5. Suit­able for trac­tion motors, gen­er­a­tors, indus­tri­al dri­ves and e‑mobility

Met­al mag­net­ic wedges (e.g. steel or mag­net­ic sheet)

We also offer con­duc­tive met­al mag­net­ic wedges for spe­cial dri­ve con­cepts. This vari­ant is par­tic­u­lar­ly suit­able where mag­net­ic con­duc­tiv­i­ty is required — for exam­ple for tar­get­ed field guid­ance in the rotor:

1. Mag­net­i­cal­ly con­duc­tive, not elec­tri­cal­ly insu­lat­ing
2. Extreme­ly robust and mechan­i­cal­ly high­ly resilient
3. Can be used in spe­cial machines, rotors with inte­grat­ed mag­net­ic guid­ance or field-con­trolled sys­tems
4. Com­pat­i­ble with insu­la­tion class­es F and H

Wide range of appli­ca­tions

Our mag­net­ic wedges are used in numer­ous indus­tries and appli­ca­tions — includ­ing:

1. Trac­tion motors in elec­tro­mo­bil­i­ty
2. Gen­er­a­tors for wind tur­bines
3. Indus­tri­al dri­ve sys­tems in pro­duc­tion, con­vey­or tech­nol­o­gy and automa­tion
4. Spe­cial machines with high demands on sta­bil­i­ty and effi­cien­cy

AMD GmbH — Your part­ner for cus­tomized solu­tions

Whether elec­tri­cal­ly insu­lat­ing or mag­net­i­cal­ly con­duc­tive — AMD GmbH pro­vides you with cus­tomized mag­net­ic wedges, tai­lored to your geom­e­try, tem­per­a­ture and load require­ments. Our prod­ucts com­bine tech­ni­cal pre­ci­sion with high mate­r­i­al qual­i­ty — and make an impor­tant con­tri­bu­tion to the safe, durable and effi­cient func­tion­ing of your dri­ve and gen­er­a­tor sys­tems.

Do you have any ques­tions or would you like to find out more?
We are at your dis­pos­al. Vis­it our con­tact page and get in touch with us direct­ly — we look for­ward to exchang­ing ideas with you.