Kar relay yɛ anyinam ahoɔden switch a egyina anyinam ahoɔden afiri so yɛ adwuma, na ɛma nsɛnkyerɛnne a ahoɔden sua-tumi di amansin a ɛhia ahoɔden a ɛkɔ soro so. Nneɛma atitiriw a ɛwom ne coil, contacts, ne spring, na egyina nnyinasosɛm a ɛne electromagnetic induction so na ɛyɛ adwuma. Sɛ current fa coil no mu a, magnetic field bi ba, na ɛma contacts no sesa, na ɛnam so hwɛ current flow no so.
Kar relays yɛ nnwuma a ɛho hia pii na ɛyɛ ade titiriw a ɛma anyinam ahoɔden nhyehyɛe a ɛyɛ den no yɛ adwuma sɛnea ɛsɛ:
Circuit Control: Relays di dwuma wɔ circuit regulation mu wɔ core kar nhyehyɛe pii mu, te sɛ starter motor no a wɔde di dwuma denam ignition switch a ɛnyɛ den so a wonni current akɛse ho dwuma tẽẽ.
Mprempren Nkɔsoɔ: Wɔde tumi a ɛba fam-nsɛnkyerɛnneɛ di dwuma de hwɛ mfiri a ɛwɔ ahoɔden kɛseɛ (te sɛ mframa a wɔde yɛ adwuma ne kanea a ɛwɔ anim), a ɛsiw circuit switches a ɛboro so no ano.
Circuit Protection: Sɛ ɛba sɛ overcurrent anaasɛ short circuit ba a, relays betumi atwa circuit no mu ntɛmntɛm, na abɔ anyinam ahoɔden mfiri a ɛho hia ho ban na ansɛe.
Signal Conversion: Relays ho hia titiriw wɔ signal conversion mu, te sɛ driver signals a wɔdannan no kɔ light command signals mu wɔ turn signal systems mu.
