How Do Generator Excitation Systems Function?

Have you ever wondered how generator excitation systems function? We’ve got the answers you’re looking for! Read on to find out more about these systems.

If you have a facility that requires a generator excitation system to operate day-to-day performance, it makes sense that you would want to understand more about how these systems work. You’ve come to the right place! Read on and learn how generator excitation systems function and what you need to know about them.

Excitation System Operation

Even if you don’t know the exact inner workings of a generator excitation system, you probably know that generators require rotor winding to function. Excitation systems are responsible for providing the field of current that makes rotor winding possible. There are a few types of excitation methods, including shunt or self-excited, auxiliary winding, permanent magnet generator, and excitation boost systems.

All these methods have a system in common: an automatic voltage regulator, or AVR, which is responsible for providing DC output to an exciter stator.

Excitation System Control

Simply having a generator excitation system is not enough—it’s essential to have excitation control. That’s where an advanced generation platform like the EX2100 excitation control system comes in. This system contains transformers, power bridges, a protection module, and, most importantly, multiple controllers.

A system like this is essential when you want seamless integration with human-machine interfaces, static starters, or turbine controls. This particular system is also a functional controller for retrofit units, meaning that you don’t need to have the most up-to-date equipment to see the full benefits.

Automatic Voltage Regulator

An automatic voltage regulator works by receiving input from a generator’s stator during rotation. Some AVRs can receive an additional input in order to eliminate internal harmonics—these are used when you have a non-linear load operation.

Now that you know how generator excitation systems function, don’t forget how important excitation control systems are! If you’re looking for stability and reliability, you’ll want to be sure that you prioritize a control system.

What Is Electro-Hydraulic Control in Industrial Automation?

No one ever said industrial automation was simple—electro-hydraulics certainly aren’t. However, learning how to control them is essential for automation.

Industrial automation is a field with tons of different processes and technologies—one of the most useful of which is electro-hydraulics. While this concept is fascinating on its own, electro-hydraulics are useless without a way to control them. We’re going to dive deeper into electro-hydraulic control in industrial automation, as well as take a look at how electro-hydraulics are useful in a variety of facilities and applications.

Breaking It Down: Electro

Before we describe electro-hydraulics as a whole, it’s important to have a basic understanding of the concepts that make up the process. The “electro” part of the word refers to the electrical portion of the process. In the case of electro-hydraulics, this electricity is used to send signals to various parts of the drive in order to instruct other areas to carry out given tasks.

Breaking It Down: Hydraulic

The other half of electro-hydraulics are the hydraulics, a mechanical function that produces movement through liquid pressure. Hydraulic systems contain different actuators, irrigation systems, aqueducts, and hoses, depending on the function of the given system. You’ll most commonly see hydraulics show up in automotive braking and power steering, but it’s an essential function in industrial automation, too.

When we’re discussing electro-hydraulics, this part of the system is used for its adjustable hydraulic valves that open and close.

The Electro-Hydraulic Control Process

When we put those unique halves together, we gain a better understanding of how the entire electro-hydraulic process works. Through the use of a solenoid (which is a coil of wire, a moveable plunger, and a housing), electrical energy is converted to mechanical energy that can open, close, or change the direction of liquid flow in a directional valve.

Electrical signals are sent to the solenoid, directing it to open, close, or change direction. Also at work in the valve are chambers known as ports. When the solenoid slides a spool inside the valve, different ports open or close. When liquid is blocked or allowed to flow, you can achieve different mechanical results in your system.

All of this would not be possible without signal processing, which is done through electrical signals on a computer. When you have continuously adjustable valves and proportional valves, you can constantly adjust set points for increased process compensation.

Upgrading Hydraulic Systems

Electro-hydraulic actuators are an improvement over basic hydraulic systems. Basic hydraulic systems require multiple hydraulic pumps and tubing, while electro-hydraulic actuators include a pump of their own. This makes system design simpler while also increasing the reliability and safety of your overall system.

Benefits of Using Electro-Hydraulic Control

Now that you have a solid understanding of the inner workings of an electro-hydraulic system, let’s explore the benefits of using one in your facility or industry. For one thing, the efficiency upgrade from traditional hydraulic systems is substantial. Depending on what you will use your electro-hydraulic system for, you may be able to see an increase in efficiency of up to 80 percent.

The reason for this sweeping change is the electro-hydraulic motor’s power-on-demand capabilities. Your motor will use no energy when it is not specifically needed, which can significantly reduce the amount of energy waste in your facility. This leads to a secondary benefit in the form of an increased component lifespan. When you don’t need to think about the engine and pump idling, bearings and seals will naturally last longer.

One other major benefit is the simplicity of the pump controls. Because of its unique design, signals only need to tell the pump information about speed and motor direction, as opposed to multiple proportional and directional values. Reduced complexity means that addressing problems when things go wrong becomes a much simpler situation.

Electro-hydraulic actuators can additionally be used in some instances that surpass the capacity of traditional hydraulics, as they can handle up to a 4,800-pound load. Despite this increased capacity, electro-hydraulic actuators are quieter than traditional hydraulic actuators, which may be an additional benefit in certain situations.

Finally, the size and availability of electro-hydraulic motors is a large advantage. Because these require a high-energy battery pack as opposed to a gas engine, an electro-hydraulic unit has far more versatility. When engineers don’t need to place a given component near others, it affords them greater design creativity and leads to a better final product.

Thankfully, the price of these units is also falling as more and more companies begin to develop parts and components. For instance, we have all the parts you need for the Mark V DS200 in stock now.

Drawbacks of Using Electro-Hydraulic Control

Of course, no technology is without its share of drawbacks. We want to make sure you understand the full picture of the technology you’re using before you make a decision. One of the biggest problems with electro-hydraulics is their perception. It was only a few short years ago that these devices were avoided because they caused more problems than they solved.

Upon their first introduction, electro-hydraulic actuators were much weaker and more unreliable than traditional hydraulic actuators. In the ensuing years, they have grown far more powerful and more dependable than traditional actuators.

However, electro-hydraulic actuators do still carry a higher upfront cost than their traditional counterparts. You’ll feel this financial factor more when you need to install multiple units, but it’s important to note that this is a high initial cost. In time, through efficiency savings and maintenance savings, electro-hydraulic actuators become good value and pay off.

The other issue is that while electro-hydraulic actuators come with reduced maintenance, that doesn’t mean they require nomaintenance at all. When something goes wrong, it’s important to have a specialist that can come in and fix the problem, as your average repair worker will likely be unable to address the issue.

Now that you know what electro-hydraulic control in industrial automation is, remember that AX Control can help you find the parts you need for your electro-hydraulic control system or any number of other industrial machines! We always provide competitive quotes on parts and repairs, so be sure to check with us first when you need parts for industrial automation. Contact our team today to learn more!

What Is Electro-Hydraulic Control in Industrial Automation?

Electric Motor Protection Relays Explained

Single phasing, Earth faults, and short circuits are just a few potential points of failure in motors. Electric motor protection relays can help.

No facility wants to halt production due to an Earth fault or short circuit, but these things do happen. Still, you can prevent these shutdowns by using electric motor protection relays. That said, not everyone understands the intricacies of these useful devices. Read on to discover an explanation of electric motor protection relays.

Why Is Motor Protection Important?

The vast majority of motors in any given industry are induction motors. They are economical and easy to maintain, but they do require certain technology to run optimally and without failure. When you operate these motors without motor protection, you open yourself up to all sorts of financial risks.

In addition to the cost of repair or replacement, you’ll also lose money from shutting down production. Because induction motors are vital to your facility, you won’t be able to get back up and running until you fix the problems. You’ll lose precious hours fixing the problem, taking your employees away from other important tasks.

How Motor Protection Relays Work

You might wonder how motor protection relays work to solve this problem. They protect against short circuiting, thermal overloads, locked rotors, single phasing, and Earth faults. Once the relay detects a fault, it will open the breaker to disconnect the faulty circuit. Motor protection relays can also notify you when this occurs so you can get your people on it right away.

Benefits of Motor Protection Relays

This process avoids the potential of a motor functioning at limited capacity until it breaks, giving you time to address the problem as you see fit. By using an electric motor protection relay, you should not need to replace your motors. Instead, you can perform small repairs on the faulty circuits.

When you need GE Multilin relays for your facility, AX Control has you covered. We carry the products you need for your industry, and you can always reach out to us with any questions you may have.

Now that you know how electric motor protection relays work, you should have a better understanding of whether you need one in your facility. Make sure you look over the benefits of motor protection relays carefully. They can save you a lot of time and money.