Introduction to static stabilizer.
Static voltage stabilizers are a must for industrial facilities. However, the process of getting a voltage correction machine can be overwhelming. You can find numerous types of units out there. Among those types, the static stabilizers hold a prominent place. It is a purely electronic system without any motor or moving parts. At the end of this article, you will come to know its advantages over servo type system. These units are also called IGBT stabilizers since the IGBT bridge constitutes the heart of the system. Let’s explore all about these static voltage regulators.
What is a static voltage stabilizer?
A static voltage stabilizer doesn’t have any moving parts. It has a Power Electronic Converter Circuit, which can effectively stabilize the voltage. You can expect to receive a high accuracy out of the static voltage stabilizers. In other words, you can get a voltage stabilization of up to ±1% from this kind of unit.
In other words, a stabilizer takes the clue about under or overvoltages from the input. But, the Inside a static voltage regulator, you will find a buck and boost transformer, microcontroller, Insulated Gate Bipolar Transistor, and Microprocessor. However, many times an SCR or MOSFET also use for a power bridge. But, there are several advantages of using IGBT over SCR.
Please read use of static voltage stabilizers for following specific applications.
Features of a static voltage regulator
If you are looking for a maintenance-free and faster voltage regulator, you may look at a static voltage stabilizer. Let’s explore the features that you can expect to receive out of this kind of static stabilizer. Based on the features, you can confirm whether it matches your applications or not.
- No moving parts. Hence, it is reliable and has a long life.
- It is an electronic-based device. Thus, it is easy and cheaper to incorporate EMI and RMI Filters.
- You can keep track of both input and output voltage without a struggle as they come along with a digital control panel.
- The voltage stabilizer deliver a 1% output tolerance, which is highly precise.
- After getting a static regulator, you shouldn’t worry too much about maintenance. They require little maintenance.
- You can expect to receive a high efficiency out of an electronic voltage stabilizer. For example, it delivers efficiency of up to 97%.
- These units can customize to have manual or auto bypass.
- Using the static regulator will not be a challenge as it comes with a lightweight modular structure. You will not have to go through any struggles when moving it from one place to another.
- You can use various input voltages for the IGBT regulator and regulate the output voltage accordingly.
- There’s an adjustable start delay for protection in these systems.
- In most units, there is an alarm indicator. It includes both sound and lights.
- The static regulators will automatically restart after a power outage.
- There is a smart fan cooling system to keep the stabilizer cool at all times. It will help you to get a long-term operation without encountering any struggles. In a nutshell, even if the static voltage stabilizer price is high, looking at its benefits, it gets justified.
How does a static stabilizer work?
Inside a servo stabilizer, you can see a servo Now you know what a static voltage stabilizer is. Before you get a one for the industrial facility, you need to understand how it works to provide a regulated voltage output. The microcontroller present within the static stabilizer will control the IGBT power converter. It will generate voltage via the Pulse Width Modulation method. Thus, it can produce the required level of voltage.
To understand its working, we need to understand the static voltage stabilizer designer as a whole. However, DSP based microprocessor board is responsible for taking feedback from input and output and trigger IGBTs.
Pulse Width Modulation (PWM) technique.
As per the fundamentals of the Pulse Width Modulation method, there is a power semiconductor switch present within the static regulator. It is responsible for driving the transformer and delivering the desired voltage output. The generated output voltage will then transfer to a buck and boost transformer. Here, the IGBT power converter will contribute towards the phase of output voltage. Please see attached static voltage stabilizer circuit diagram.
You can get voltage in phase, 180 degrees out of phase, into the input supply. It will then enable the controlling mechanism. It determines whether voltage should be added or removed, depending on the rise and fall of the voltage supply provided. Hence, PWM is crucial in static voltage stabilizers for voltage correction. Please have a look
Microprocessor & IGBT Module.
The microprocessor will focus on the input voltage at all times. If there is a drop in the voltage level, it will send out a Pulse Width Modulation signal right into the IGBT power converter. Then the IGBT power converter will generate appropriate voltage, representing the voltage difference between the supply and output. The produced voltage will also be in the same phase as per the input power supply of the static voltage regulator.
It will be fed right into the buck and boost the transformer’s primary coil upon generating new voltage. The secondary coil of this buck and boost transformer has a direct connection with the power supply. Hence, the voltage induced within the secondary coil gets added directly to the IGBT voltage stabilizer’s input power supply. Along with this, the stabilized increased voltage will get added to the load.
Voltage correction.
The primary responsibility of the microprocessor is to keep an eye on the rise of input voltage levels of static voltage stabilizers. If there is a rise in input voltage, it will send out the PWM (Pulse Width Modulation) signal into the IGBT power converter. However, the voltage generated here will be having a phase that is 180 degrees out from the input power supply. This is where the IGBT power converter will create a voltage accordingly for the difference. This voltage will be supplied to the primary coil that you can find within the buck and boost transformer.
As mentioned earlier, the buck and boost transformer in the secondary coil has a connection with the input power supply. Therefore, the induced voltage will be reduced from the supplied input power supply. Along with that, the stabilized new voltage will be given out to the load. This is where you can make sure that your industrial appliances are getting a stabilized voltage supply. It will provide you the opportunity to stop worrying too much about protection.
Difference between the static voltage stabilizer and servo stabilizer?
When you cross-compare a servo regulator and a static stabilizer, you will notice considerable differences between them. Following are the key differences that you can discover within these two types of units as of now.
Level of reliability.
A servo stabilizer would stabilize voltage by increasing the number of winds in the transfer or decreasing the number of winds. It would create a direct impact on the output voltage of the transformer. In other words, the reliability of a servo transformer varies depending on the reliability of servo motors. Likewise, the reliability you can get out of a static transformer varies based on the IGBT power stage. You can expect to receive a higher level of reliability from the static voltage stabilizer based on this mechanism.
Correction speed.
You don’t see any moving parts within a static regulator. In other words, you can discover an electronic circuit within the static stabilizer. Therefore, you can expect it to deliver faster results with voltage stabilization. In other words, the static regulators deliver a low correction time. It would usually be around 20 milliseconds to 30 milliseconds. You can also expect them to offer a high voltage correction speed, around 350 V/ second to 500 V/ second.
The performance status of servo stabilizers is not so impressive. They have moving parts, which slow down the overall operation. You can expect to receive a voltage correction speed of around 100 V/ second out of a servo stabilizer. Likewise, the correction time can take somewhere about 50 milliseconds to 4 seconds.
Short circuit protection.
The primary role of a voltage stabilizer is to regulate output voltage fluctuations. However, it should also be in a position to provide short circuit protection. Inside a static voltage stabilizer, you can discover a DSP control board. It will continue to measure the input voltage as well as the output voltage. If there is a short circuit, the load current will increase significantly. Then it will be cut off the output and switch from the IGBT power stage. It will take place immediately. Hence, you can ensure that no damages will happen due to a short circuit.
However, you don’t see such short circuit protection mechanism built into a servo-based voltage regulator. If you want short circuit protection, you will have to think about investing in additional hardware, such as MCCB and CB. This will help you to clear out the faults effectively.
Ease of maintenance.
The servo stabilizers are functioning with the assistance of motors. This motor is subjected to wear and tear along with time. Hence, you will have to go for regular maintenance to ensure proper functionality. You don’t need to go for such regular maintenance when working with the static voltage stabilizers. There aren’t any moving parts within a static voltage stabilizer.
Different types of static voltage stabilizers.
Any increase or decrease in value of desired voltage for a short or long time is a voltage fluctuation. It creates severe power quality issues. Ideally, we need a stable power supply. But, a sudden drop or While looking for an industrial static regulator, you will notice multiple options available to consider. The most prominent static voltage stabilizers include MOSFET-based voltage stabilizers, SCR-based voltage stabilizers, and IGBT-based voltage stabilizers.
IGBT static voltage stabilizer.
GBT-based systems are perfect examples of static voltage stabilizers. You can also call them a great example of their high performance. That’s because they can support industrial applications by regulating grid fluctuations in a perfect way.
The IGBT stabilizers are delivering enough regulation speeds, which is at 1000 V per second. On top of that, they can provide complete protection through the compensation of voltage in different phases. It will help you make sure that all systems connected to the static regulator are operating reliably. Due to the presence of a precise output voltage tolerance, you can use IGBT-based voltage stabilizers as a perfect way to secure electronic loads.
SCR based static voltage regulator.
SCR refers to Silicon Controlled Rectifier. Inside an SCR based static voltage regulator, you can discover a Shockley diode, which comes with an additional thermal. This extra thermal is named as the Gate. It will trigger the device and get that into conduction. In other words, it will make this static stabilizer latch onto the application that has a smaller voltage.
The SCR-based static voltage stabilizers are highly effective when controlling high power. You can use them along with applications that demand a high voltage as well. The unique application you can see in these units transforms them into a perfect option when managing medium to high AC voltages. Therefore, you can often see SCR-based stabilizers in industrial applications.
MOSFET static stabilizers.
The MOSFET voltage regulator can help you with stabilizing DC voltages. For example, these static voltage stabilizers are able to take in a 12V input and provide an output of 5V. These voltage stabilizers are relatively inefficient when compared to other options you can find out The MOSFET voltage regulator can help you with stabilizing DC voltages. For example, these static voltage stabilizers are able to take in a 12V input and provide an output of 5V. These voltage stabilizers are relatively inefficient when compared to other options you can find out there.
Inside the MOSFET, you can discover a semiconductor switch. This semiconductor switch would vary the resistance between two-pin, according to the voltage acquired by the third pin. Within the MOSFET, the voltage will always be there on the third pin. It is the main reason why it is called the gate pin. It continues to pull electrons into a narrow path, which is located in between other pins. It will facilitate the flow of electricity within a MOSFET static stabilizer.
Where to use static voltage stabilizer?
You can use a static voltage stabilizer for numerous industrial applications. Some of the most prominent places where you can see these stabilizers include schools, factories, hospitals, finance institutions, and other similar facilities. The static voltage stabilizers can always ensure the stability of supplied power.
If you have a requirement where fast correction speed is important, you should consider a static voltage stabilizer. That’s because you can get a low correction time of around 20 milliseconds. Likewise, people who don’t want to spend a lot of time and effort on the maintenance of voltage stabilizers can go for them as well. These voltage stabilizers don’t come with any moving components. Hence, they will not go through wear and tear.
The static voltage stabilizers can deliver output short circuit protection as well. Therefore, it is possible to provide maximum protection to expensive electronic items against short circuits. The compact size of these static stabilizers also contributes significantly to the functionality and convenience that they provide.
FAQs of static voltage stabilizers.
What is a static voltage stabilizer?
It is an electronic circuit-based voltage correction device. Unlike a servo motor type unit, a static voltage regulator does not have a moving motor to stabilize the output voltage. It corrects voltages by changing voltage across the primary of the buck-boost transformer connected to an IGBT power bridge’s output. And IGBT bridge can generate desired voltages at its output by the PWM method. A static voltage stabilizer has many advantages over servo type system.
How static regulator different than a servo Voltage regulator?
There are the following distinct differences.
- The static voltage stabilizer has less maintenance cost than the servo type.
- For the given KVA rating, the servo-type units are heavier than their peer IGBT regulator.
- Static stabilizer units are suitable for electronic load, while servo motor-controlled systems are best for industrial loads.
- Servo system has a moving mechanism, but electronic regulators do not have any moving parts.
What are the benefits of a static IGBT voltage stabilizer?
Some of the benefits of static voltage regulators are as follow:
- It has a fast voltage correction speed.
- A static voltage stabilizer can design by a wide input voltage range.
- It is highly customizable. Users can change the output voltage, voltage range from its front control panel.
- Most importantly, it can incorporate RFI/ EMI fitter without adding any extra hardware.
- It is easy to the built option of an automatic bypass.
- It is easy to ship.
- This type of system is more reliable.
- It has a low maintenance cost.
Why did a static stabilizer call an IGBT regulator?
The heart of a static voltage stabilizer is its power module. This power module is responsible for voltage correction by generating voltages across the primary winding of the buck and boost transformer. We can build a power module with SCR, IGBT, or MOSFET. But, IGBT has many advantages like low THDi, long life, high power rating, etc. Most of the static voltage regulator uses IGBT power module, and thus, it is commonly referred to as an IGBT regulator.
Why static voltage stabilizer has a high correction speed?
Due to its solid-state design, the static voltage stabilizer has a high voltage correction speed. Changing the number of winding on the dimmer takes time since the servo motor needs to move the arm in the servo regulator. But, in a static voltage regulator, all this action takes place electronically with the help of triggering IGBTs. Thus, it can correct voltage fluctuation with speed.
How does a static regulator work?
Static stabilizer consists of a buck-boost transformer, an IGBT power module, and a processing circuit. Processing circuits continuously take feedback about input voltage, output voltage, and IGBT current. If the input voltage is more than required, the processing unit triggers the IGBT module to produce an out of phase voltage than that of input voltage. Thus, the voltage across the secondary of the buck and boost transformer reduces. Similarly, when there is a low voltage at the input, the IGBT module generates in-phase voltage to compensate for voltage.
Where are static stabilizers used?
Static voltage regulators are suitable for the electronic load than motor load. Thus, it is commonly used in the following applications.
- Server room and data center.
- CNC machines.
- PLC controllers.
- Large formate electronic printers.
- Laboratory and medical equipment.
- Security scanner machines.
