Dynamo (DC Generator)
A dynamo is a direct-current generator used to charge the battery on older cars before alternators became common.
What is Dynamo (DC Generator)?
It gives low output at idle. A separate control box regulates voltage and current. Brushes and bearings wear and need servicing. A charging light that stays on at higher revs points to a dynamo or control box fault.
How it works
The engine turns an armature inside a magnetic field, and a commutator produces direct current.
Why it matters for your car
Modern accessories can draw more power than a dynamo provides. Some owners fit alternators that look like dynamos.
Other terms
- Air-fuel Ratio
- Airing Down (Lowering Tyre Pressure Off-Road)
- Clutch Judder
- Clutch Kit
- Cylinder Deactivation (Cylinder On Demand)
- Door Ding (Parking Dent)
- Fuel Pressure Regulator
- Galvanised Body (Zinc-coated Steel)
- Grand Tourer (GT)
- Load Securing
- Ozone Treatment (Odour Removal)
- PCV Valve (Positive Crankcase Ventilation Valve)
- Power-to-weight Ratio
- Range Extender
- Repair Estimate (Quote)
- Roof Box (Roof Top Carrier)
- Safe Exit Warning (Exit Warning)
- Traffic Jam Assist
- Transmission Fluid (ATF)
- Waterless Wash