Alternators - LUCAS: Description
Lucas "ACR" model alternators have an integral voltage regulator mounted in the slip ring end bracket. The stator consists of star-connected, three phase windings on a ring end cover and drive end bracket. The rotor is either an eight or twelve pole type with the field windings connected to two face-type slip rings, and is supported in drive-end bracket by a ball bearing and in the end cover by needle roller bearings. One positive and one negative carbon brush ride against concentric brass slip rings. The heatsink-rectifier, terminal block assembly incorporate six silicon diodes, forming a full wave rectifier bridge circuit, and three diodes which supply current to the rotor windings.
NOTE:
Up to a ten milliamp battery drain is normal, even with the ignition in the "OFF" position.
APPLICATION
| Model | Type No. | |
|---|---|---|
| Austin Marina | 18 ACR | |
| Jaguar | ||
| XJ-6 Without Air Cond. | 18 ACR | |
| XJ-6 With Air Cond. | 20 ACR | |
| XJ-12 | 20 ACR | |
| MG | 16 ACR | |
| Triumph | ||
| Spitfire 1500 | 16 ACR | |
| TR-6 | 18 ACR | |
| TR-7 | 20 ACR | |
SPECIFICATIONS
| Nominal Output | ||
|---|---|---|
| Alternator | Amps @ RPM | (1) Voltage |
| 16 ACR | 34 @ 6000 | 12 |
| 18 ACR | 43 @ 6000 | 12 |
| 20 ACR | 66 @ 6000 | 12 |