(187 products available)
Ready to Ship
Alternators are categorized based on design and construction. Here are some common types:
Synchronous alternators
This is the most common type of alternator. It is used for power generation in electrical power stations. The rotor of a synchronous alternator is electromagnetically excited by direct current (dc) supplied from an external source. The rotor spins at a constant speed that is synchronized with the frequency of the alternating current (ac) power system.
Asynchronous alternators
This type of alternator is less common. It is used in applications where the speed of the rotor does not need to be synchronized with the frequency of the ac power system. The rotor of an asynchronous alternator is electrically induced by the alternating magnetic field in the stator. The rotor speed is slightly less than the synchronous speed, which allows it to generate electricity even when the rotor is not rotating at the exact frequency of the ac power system.
Self-excited alternator
This alternator uses its output to energize the excitation system. It does not require an external dc source for excitation. Self-excited alternators are typically used in standalone or isolated power systems where external dc sources may not be available.
Permanent magnet alternator
This type of alternator uses permanent magnets on the rotor instead of an electromagnet for excitation. Permanent magnet alternators are compact and require less maintenance since they do not depend on an external dc source for excitation.
Hydrogen alternator
Hydrogen alternators are designed to use hydrogen as the working fluid for cooling and excitation. They are suitable for high-temperature and high-pressure applications where hydrogen's properties can be utilized effectively.
Alternator 120 amp specifications may differ depending on the manufacturer. Nonetheless, here are some common features to look out for:
Power Output
The 120-amp alternator generates 120 amps of current, which is sufficient to power several accessories and electronic components. This makes it ideal for vehicles with upgraded sound systems, lighting, and GPS.
Voltage
The 120 amp alternator has a no-load output voltage of 13.5 to 14.5 volts. The voltage level varies depending on the model and manufacturer.
Bearings
Some alternators feature dual bearings, while others are single. The bearings may be maintenance-free or steel and graphite.
Case Material
The alternator's case is mostly made of aluminum or die-cast zinc. The case material determines the weight of the alternator.
Regulator
The alternator comes with a built-in voltage regulator. Some models have external voltage regulators, while others have digital regulators.
Cooling System
The alternator is air-cooled. Some models feature a cooling fan that helps to regulate the temperature and prevent overheating.
Mounting Style
Alternators are available in different mounting styles, such as side, front, or rear. The mounting style will determine how the alternator is installed.
It is important to maintain the alternator to increase its longevity and performance. Here are some general maintenance tips:
Wholesale buyers need to understand the needs of their customers before sourcing for any products. In this case, it's important to know whether the customers need a 120 amp alternator for heavy-duty applications or for more light-weight electrical accessories. This is because the needs will determine the kind of models to go for.
Another important factor to consider is the type of vehicle the alternator will be used in. Different vehicles have varying power requirements based on their make and model. It's advisable to look for alternators that are compatible with a wide range of vehicles. This will ensure that every customer gets what they ordered.
It's also important to consider the quality and brand of the alternators. While there are many generic brands in the market, it would be prudent to stock some reputable brands. Focus on quality products that offer reliability and durability. This will help maintain a good reputation and reduce the returns rate.
Buyers should also consider the price when sourcing for 120a alternators. It is important to strike a balance between quality and affordability. Finding suppliers that offer competitive prices for quality products is key. This will ensure that every customer gets value for their money.
Additionally, buyers should look for warranties and after-sales services offered by alternator suppliers. A good warranty period shows that the supplier has faith in the products they are selling. After-sales services such as technical support are also important as they help clients to navigate through any issues they may face with the products.
Alternator replacement is a pretty straightforward process that can be done regardless of the vehicle make or model. However, this guide details how to replace a 120 amp alternator.
Tools needed:
Step-by-step guide
Disconnect the battery
Use the battery terminal wrench to disconnect the battery cables. This will ensure the safety of the user and prevent any short circuits from occurring.
Remove the alternator belt
Use a socket wrench to loosen the tensioner pulley and remove the belt wrapped around the alternator.
Disconnect the alternator cables
Use the battery terminal wrench to loosen the bolts and disconnect the cables from the alternator. Remember to use a shop towel to soak up any leaking fluids. Also, remove the plug connector.
Remove the alternator bolts
Use a socket wrench to remove the bolts that are securing the alternator to the engine. Depending on the type of vehicle, the alternator may have one to three mounting bolts.
Remove the alternator
Gently pull out the alternator from the engine.
Install the new alternator
Place the new alternator in its designated location and secure it with the mounting bolts. Then, reconnect the plug connector.
Reconnect the alternator cables
Use the battery terminal wrench to reconnect the cables to the alternator. Ensure the connections are snug and secure to prevent any alternator issues.
Reinstall the alternator belt
Wrap the belt around the alternator pulley and adjust the tension using a socket wrench.
Reconnect the battery
Reconnect the battery cables to the battery terminals and ensure they are tightly secured.
Q1: What Are 120A Alternators Used For?
A1: The 120A alternator is standard on most vehicles. It's used to power the basic electrical components of the car.
Q2: Can You Upgrade to a Higher Amp Alternator?
A2: Yes, a higher amp alternator can be installed. This is useful for cars with added electronic equipment or for powering extra accessories in a vehicle.
Q3: Is a 120A Alternator Good for Towing?
A3: Yes, the 120A alternator is sufficient for towing needs. It keeps the electrical systems running while towing is done.
Q4: Does the 120A Alternator Require Special Maintenance?
A4: No, the 120A alternator needs the same care as any other. Keeping it clean and checking connections is all that is required.
Q5: How Long Does a 120A Alternator Last?
A5: 120a alternators last about 5-7 years on average. Their lifespan can vary depending on usage and care.
浙公网安备 33010002000092号
浙B2-20120091-4