There are various types of variable frequency drives (VFDs) available in the market. Each one is designed for a unique application. This article by CM Industry Supply Automation will review the main factors that will help you make an informed decision.
There are various factors you have to consider while choosing a variable frequency drive for any type of drive system. These factors include:
1. The incoming power supply
The drive system incoming power supply is the biggest definer of volume in your system. VFDs should be chosen based on their compatibility with the power supply. According to voltage and frequency, recent capacity, and available KVA, you need to make the right selection.
2. The type of motor
Usually, several induction motors can advantage of having a Variable Frequency Drive including higher efficiency. Permanent magnet synchronous motors are not usually self-starting and require a Variable Frequency Drive for working. Some VFDs are available with permanent magnet motor control choices as a usual feature, permitting users for controlling the permanent magnet motor to drive the machine proficiently.
3. The rated current, frequency, and voltage of the motor
The rated current, frequency, and voltage of the motor are crucial factors to make a choice. A VFD must not be chosen based on the motor power rating alone. It is highly crucial to find the VFD that can offer the motor’s rated nameplate current uninterruptedly.
4. The application type
Many Variable Frequency Drives are only made to be utilized on normal duty or light duty loads such as pumps or centrifugal fans and will only stand lighter overloads for a short time frame. Some Variable Frequency Drives Are Dual Rated and can be utilized on HD or ND/LD loads both.
5. The installation setting
Choose the right IP rating for the Variable Frequency Drive identified by if it will be installed in inclusion or straight onto a wall, machine leg, or pump skid.
Understand condensation that takes place if the Variable Frequency Drives are exposed to high-temperature changes for instance daytime sun to night-time frost.
When connecting Variable Frequency Drive or other non-linear loads you must consider the effect on the power supply. Non-linear loads including diode rectifier input designed to ‘bite’ current from the chunks mains and at particular multiples of the base supply frequency instead of sinusoidal as with linear loads which in turn results in misrepresentation to the supply voltage waveform.
Harmonic currents can put an adversarial effect on transformers, cables, and delicate electronic devices, so certain harmonic limits are applied before linking VFD loads onto a new or current network.
Looking for Lenze VFD, Variable Frequency Drive, Inverter Drive, Variable Speed Drive, or Servo Drive? Speak to CM Industry Supply Automation specialists at +91 8956113099 or +61 3 9013 5882
CM Industry Supply Automation specialist offers great support to different industries regarding industrial automation products. Our specialist offers advice on the drive system and helps in choosing the best variable frequency drive for the essential application. From fan or pump, or a heavy-duty application, we can provide VFD from dimensioning to installation services at the best price.
VFD often called Variable frequency drive is an important part in any machine. VFD is a motor controller accountable to drive an electric motor by changing the applied voltage and frequency to the same. It is also known as adjustable frequency drive, adjustable speed drive, variable speed drive, AC Drive, or inverter.
It is very crucial to maintain a Variable Frequency Drive to ensure the smooth working of any machine. In any condition if there is any defect occur in the drive, it is sensible to seek reliable VFD repair services provided by CM Industry Supply Automation without any delay.
Based on Variable Frequency Drive fundamentals, the term VFD and AC drive are identical. Variable frequency drives are used in several industries. 5 applications where VFDs are used:
Crane and Elevator Applications
The Variable Frequency Drive are used in crane and other elevator applications results in an efficacy up to 90% because of the accuracy offered by the device. Here, Variable frequency drives are utilized in asynchronous motors in above elevator and crane applications to lift substantial weight easily and competently.
Variable Frequency Drives are utilized in irrigation pumping having many advantages for the sector such as reduced costs of pumping applications. Here, Variable Frequency Drives are utilized in a motor connection with the irrigation pump’s curve.
The curve is designed into a mockup program that highlights how the changing speed influences the pump’s behavior. This variation, along with the variation in the kilowatts power utilized by the pump at changed duty points permits you to make a right decision.
Air-conditioning System (AC)
This is a very common utilization of VFD (variable frequency drive) to control temperature of AC. This Variable frequency drive use has bigger environmental consequences as it cuts down the carbon dioxide emission in the atmosphere and saves energy.
Particularly in the sub-tropical areas where the use of air-conditioners is rather high, Variable Frequency Drive help makers to come up with new designs with smart technology and energy-saving machines for tackling major environmental concerns.
VFD is even advantageous for all the fitness enthusiasts as it is present in treadmills. Here, they are utilized along with an AC motor like a replacement to earlier-used DC motors.
Previously, DC brush motors were utilized in treadmills for cost-saving aims, but did not withstand due to high failure ratio of carbon brush and commutator equipment, low-speed rotation and extra maintenance cost. These flaws were overawed by Variable Frequency Drives utilized with AC motors.
Pulp and Paper machines
VFDs are used in the pulp and paper machines. Lenze VFD permit the energy points of every machine to start and stop discretely. It makes facility to adjust the speeds. They help to increase and decrease the sync machine speed efficiently.
With the utilization of Variable Frequency Drive, the paper machine speed would be mechanically recovered as the unique working speed after paper tensioning. You can regulate the extreme design speed according to precise production needs with an extra stop utility in the machine.
PLC (Programmable logic controllers) and HMI (human-machine interfaces) are the keystones of new automation system. These systems work like a brains of an industrial machine. They ensure that all aspects of the machine are working correctly and precisely. Depending on the machine size, many big size PLC’s or may be one is used on a machine. These important units can become highly expensive, so it is crucial to choose the right one for your machine.
In this article, CM Industry Supply Automation would define newer technology designed to save money. VFD or variable frequency drive is made for controlling the electric motor speed to match the quick requirement of an application. Some of these motors works at 100% speed every time even if there is no necessity. Variable Frequency Drives are utilized to change the whole amount of energy transferred to the motor by checking several inputs and determining whether to raise or low the amount of energy transferred to a motor.
For instance, if consumers are operating a machine and required to pump coolant all through it, then the pump motor might operation uninterruptedly at 1,000 RPM. However, if manufacturing has slowed or if the machine is working much cooler than often then operating the motor at that rate is completely inefficient. In such condition placing variable frequency drive within the system plus sensors, will determine if the pump requires to be slowed down and repeatedly regulate the energy transferred to the motor. During slower manufacturing times, the pump motor perhaps reduced to only 600 RPM thus saves energy directly.
The great feature about motors is that the savings of energy are non-linear that means speed reduction from 1,000 RPM to 600RPM does not decrease consumption of energy by 40%. You can say it’s a cubic relation to saving of energy means that a Variable Frequency Drive incorporated in the system will utilize 22% of energy than at 1,000 RPM. For this setting, the Variable Frequency Drive will save approximately 80% of the expenditure spent on energy when operating at a low speed.
When motors are made into a system, we usually select them on the basis of power that means the one which is powerful enough to manage the biggest task or load, would be our final choice. Often, it is carried out to ensure the motor is not matched with a substantial challenge. There is a no need of motor controller as the system will operate full speed even if it is surplus.
The significance of a Variable frequency drive is how it helps saving money over time. The main part of savings available from a reduction of:
CM Industry Supply Automation highlights many such benefits of VFD in their industrial automation blogs.
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CM Industry Supply Automation are supplier and repair services provider of drives, VFD drive (variable frequency drive), VSD (variable speed drive), inverter, frequency converter, ac drive, servo drive, servo motor, industrial drives, industrial drives and controls, industrial drives and applications, high-power servomotor, high torque DC servo motor, high-power servo drives, high frequency drives, of some well-known brands that include:
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