Batteries get a lot of attention when we talk about powering the electric components of your car. But just like Batman would be nothing without Robin, a battery is just a black box without its alternator sidekick!
What is a car alternator?
A car alternator works with your battery to generate the power needed for the electrical components of your vehicle. Everything from your headlights to touchscreen displays relies on this partnership.
What does an alternator do?
An alternator generates electrical power, converting the mechanical energy of the engine into electrical energy. It plays a crucial role in maintaining battery charge and providing a continuous and regulated electrical supply to your vehicle.
How an alternator works
Mechanical input
Car alternators are connected to the engine through a belt. As the engine runs, so does the belt, feeding mechanical energy into the alternator.
Spin cycle
The mechanical energy of the belt drives the alternator’s rotor. This component spins at a speed directly proportional to the speed of the engine.
Electromagnetic induction
As the rotor spins inside a stator (a stationary component), the alternator creates a magnetic field. This field induces an alternating current (AC, hence the name ‘alternator’!). If you have an induction cooktop at home, it works on a very similar principle, albeit with fewer moving parts.
Conversion and regulation of electrical output
Diodes then convert the AC to direct current (DC), and a voltage regulator ensures a steady output of electrical energy that charges the battery and powers other electrical components. The regulation of output is crucial, preventing damage through surging electrical energy as the engine speeds up or insufficient charge as it slows down.
Signs of a faulty car alternator
Time is the ultimate nemesis of all car batteries, but other factors can bring a car battery to a premature demise.
Rapid clicking
A rapid clicking sound on start-up is a red flag for an issue with your alternator, which may be struggling to convert enough energy to replenish all of the electrical components in your vehicle. The good news is that there’s a good chance you may be able to get your vehicle jump started if this is the case. Of course, it’s always safer to have a professional do this for you, so if you’re not confident or experienced, give your roadside assistance service a call and bring your vehicle to us so we can diagnose and resolve your issue quickly and effectively.
Dimming headlights
Noticed that your headlights dim a little while idle or moving? A failing alternator may not be generating enough power to keep the lights consistently bright, indicating a potential fault.
Rapidly draining battery
If your car battery drains rapidly, it might not be getting enough charge from the alternator, a sure sign that it’s time for a professional opinion.
Electrical malfunctions
Are your power windows suddenly slow to rise or lower? Apple CarPlay cutting out? Inconsistent power supply affects the performance of all electrical systems in your vehicle, so any issues across these components may be a red flag for an alternator concern.
We’ll keep your battery going longer
Maintaining a healthy battery and car alternator is crucial for the overall performance and reliability of your vehicle’s electrical system. So if you’re experiencing dimming lights, strange noises or other electrical malfunctions, seek the advice of our expert technicians immediately. We regularly monitor the health of electrical components as part of your car’s regular servicing and maintenance program. We use sophisticated diagnostic tools to identify and rapidly resolve any alternator issues, and we’ll keep you on the move with a loan vehicle, free of charge. Book a service today.
