Frequency converter = <1 kv

Do you have an AC motor and want to control its speed? Then the use of a frequency converter is an interesting product for you. A frequency converter is always used when you need permanent speed control on a machine. This can be, for example, pumps or compressors, but also fans, mixers or mills with electric motors. A frequency converter converts the fixed mains voltage into a variable voltage. This enables not only operation of the motor at a constant speed, but also acceleration and deceleration. In this way, the speed of a machine can be adapted to the current work requirements, energy can be saved if necessary, or production processes can be varied over time.

Use the high-quality frequency converters from the eibabo® shop, protect materials with speed control and thereby extend the service life of your machines. Manufacturers of high quality goods are ABB, Eaton, KEB Automation, Maico, Mitsubishi, Omron, Rockwell, Schneider Electric and Siemens.

What is electrical frequency?

In order to explain electrical frequency and to be able to deduce the function of a frequency converter, we must first look at the basics of electricity generation. There is direct current and alternating current. Direct current always flows in one direction. Alternating current periodically changes direction. This change is represented in a diagram in the form of a sine wave, which is alternately in the positive and negative area of the zero point. Accordingly, an alternating voltage is also an oscillating electrical voltage.

Already knew?

The Danish company Danfoss was the first company to start series production of frequency converters. This was in 1968.


The AC frequency describes the number of cycles in this sine wave per second and corresponds to the number of changes in direction. This is given in Hertz (Hz). 1 Hertz corresponds to a complete cycle from the zero point to the positive range, to the negative range and back to the zero point. The more cycles per second occur, the higher the frequency. The usual mains electricity in Germany and Europe has a fixed frequency of 50 Hertz.

How does a frequency converter cause a change in motor speed?

The standard speed of an AC motor is tuned to a specific frequency. This is based on the structure of the respective motor. A constant magnetic field with stationary poles prevails between two field magnets. Within this magnetic field is a rotating, also magnetic 'anchor' with two poles. If alternating current is passed through the armature, its polarization changes in time with the alternating current. With a mains frequency of 50 Hz, this happens 50 times per second. Accordingly, the attractive and repulsive forces between the field magnet and the armature change direction 50 times. Once set in motion, this alternation ensures a certain rotational movement of the armature and speed of the motor. Each change in frequency therefore also causes a proportional change in motor speed. The frequency converter is responsible for changing the frequency.

The advantages are:

  • infinitely variable control of the desired nominal speed
  • Reach very high and very low speeds
  • direct switching of the direction of rotation

 

Source: eibabo®, Schneider Electric ATV320U22N4C frequency converterPicture: Schneider Electric ATV320U22N4C frequency converter

What are the reasons for a change in engine speed?

An almost constant frequency is applied to the classic AC network and therefore only one speed is available to you. The frequency converter regulates the frequency and voltage of the power supplied to the motor. That is why this device is often also called a speed controller. There are many reasons why the engine speed needs to be adjusted:

  • to save energy and increase efficiency
  • to optimize the flow of manufacturing processes
  • to protect material and extend the service life of machines
  • to meet the requirements of processing various materials
  • to adjust the torque / power of a drive
  • to lower the noise level
  • to reduce peak loads

 

Modern frequency converters have network and diagnostic functions. This makes it possible to integrate the devices into the control system of a plant and to monitor and optimize all processes.

Where are frequency converters used?

Frequency converters are used in numerous industries and applications. These devices are mainly found in compressor, pump and fan drives. But the speed of conveyor belts, production lines or cranes can also be controlled with frequency converters. An adapted or infinitely variable speed enables energy-efficient and optimized production processes.

What should be considered when buying a frequency converter?

The correct selection of the frequency converter is crucial for the optimal operation of the corresponding devices. Before selecting the drive, determine the number of input phases. Will the device be three phase or single phase? Will the device handle resistive loads, inductive loads, capacitive loads, or mixed loads? The individual loads cause different inrush currents when starting. Please consider this. Before you buy, find out about:

  • the requirements of the operating environment
  • the starting torque
  • the load torque characteristics
  • the speed control range and the static speed accuracy

 

 


TIP:

You are very flexible with regard to the location. Frequency converters are available for installation in the control cabinet, for wall mounting and for decentralized field use.


 

Since a certain level of expertise is required to evaluate these properties, we recommend consulting an experienced electrician.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Low-voltage industrial components > Frequency converter =< 1 kV you will find items from the following product groups:

Item overview:

  • Built-in converter
  • Converter unit
  • Drive amplifier
  • Engine control
  • Engine output
  • Fan control
  • Fan speed controller
  • Frequency controller
  • Frequency converter
  • Motor controller
  • Pump converter
  • Servo amplifier
  • Servo converter
  • Servo drive
  • Speed controller
  • Speed setting
  • Variable speed starter


from the following manufacturers:

Manufacturer overview catalogue Frequency converter = <1 kv:

  • ABB
  • Eaton
  • KEB Automation
  • Maico
  • Mitsubishi
  • Omron
  • Rockwell
  • Schneider Electric
  • Siemens


 
Do you have an AC motor and want to control its speed? Then the use of a frequency converter is an interesting product for you. A frequency converter is always used when you need permanent speed... read more »
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Frequency converters – speed controllers for electric motors

Do you have an AC motor and want to control its speed? Then the use of a frequency converter is an interesting product for you. A frequency converter is always used when you need permanent speed control on a machine. This can be, for example, pumps or compressors, but also fans, mixers or mills with electric motors. A frequency converter converts the fixed mains voltage into a variable voltage. This enables not only operation of the motor at a constant speed, but also acceleration and deceleration. In this way, the speed of a machine can be adapted to the current work requirements, energy can be saved if necessary, or production processes can be varied over time.

Use the high-quality frequency converters from the eibabo® shop, protect materials with speed control and thereby extend the service life of your machines. Manufacturers of high quality goods are ABB, Eaton, KEB Automation, Maico, Mitsubishi, Omron, Rockwell, Schneider Electric and Siemens.

What is electrical frequency?

In order to explain electrical frequency and to be able to deduce the function of a frequency converter, we must first look at the basics of electricity generation. There is direct current and alternating current. Direct current always flows in one direction. Alternating current periodically changes direction. This change is represented in a diagram in the form of a sine wave, which is alternately in the positive and negative area of the zero point. Accordingly, an alternating voltage is also an oscillating electrical voltage.

Already knew?

The Danish company Danfoss was the first company to start series production of frequency converters. This was in 1968.


The AC frequency describes the number of cycles in this sine wave per second and corresponds to the number of changes in direction. This is given in Hertz (Hz). 1 Hertz corresponds to a complete cycle from the zero point to the positive range, to the negative range and back to the zero point. The more cycles per second occur, the higher the frequency. The usual mains electricity in Germany and Europe has a fixed frequency of 50 Hertz.

How does a frequency converter cause a change in motor speed?

The standard speed of an AC motor is tuned to a specific frequency. This is based on the structure of the respective motor. A constant magnetic field with stationary poles prevails between two field magnets. Within this magnetic field is a rotating, also magnetic 'anchor' with two poles. If alternating current is passed through the armature, its polarization changes in time with the alternating current. With a mains frequency of 50 Hz, this happens 50 times per second. Accordingly, the attractive and repulsive forces between the field magnet and the armature change direction 50 times. Once set in motion, this alternation ensures a certain rotational movement of the armature and speed of the motor. Each change in frequency therefore also causes a proportional change in motor speed. The frequency converter is responsible for changing the frequency.

The advantages are:

  • infinitely variable control of the desired nominal speed
  • Reach very high and very low speeds
  • direct switching of the direction of rotation

 

Source: eibabo®, Schneider Electric ATV320U22N4C frequency converterPicture: Schneider Electric ATV320U22N4C frequency converter

What are the reasons for a change in engine speed?

An almost constant frequency is applied to the classic AC network and therefore only one speed is available to you. The frequency converter regulates the frequency and voltage of the power supplied to the motor. That is why this device is often also called a speed controller. There are many reasons why the engine speed needs to be adjusted:

  • to save energy and increase efficiency
  • to optimize the flow of manufacturing processes
  • to protect material and extend the service life of machines
  • to meet the requirements of processing various materials
  • to adjust the torque / power of a drive
  • to lower the noise level
  • to reduce peak loads

 

Modern frequency converters have network and diagnostic functions. This makes it possible to integrate the devices into the control system of a plant and to monitor and optimize all processes.

Where are frequency converters used?

Frequency converters are used in numerous industries and applications. These devices are mainly found in compressor, pump and fan drives. But the speed of conveyor belts, production lines or cranes can also be controlled with frequency converters. An adapted or infinitely variable speed enables energy-efficient and optimized production processes.

What should be considered when buying a frequency converter?

The correct selection of the frequency converter is crucial for the optimal operation of the corresponding devices. Before selecting the drive, determine the number of input phases. Will the device be three phase or single phase? Will the device handle resistive loads, inductive loads, capacitive loads, or mixed loads? The individual loads cause different inrush currents when starting. Please consider this. Before you buy, find out about:

  • the requirements of the operating environment
  • the starting torque
  • the load torque characteristics
  • the speed control range and the static speed accuracy

 

 


TIP:

You are very flexible with regard to the location. Frequency converters are available for installation in the control cabinet, for wall mounting and for decentralized field use.


 

Since a certain level of expertise is required to evaluate these properties, we recommend consulting an experienced electrician.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Low-voltage industrial components > Frequency converter =< 1 kV you will find items from the following product groups:

Item overview:

  • Built-in converter
  • Converter unit
  • Drive amplifier
  • Engine control
  • Engine output
  • Fan control
  • Fan speed controller
  • Frequency controller
  • Frequency converter
  • Motor controller
  • Pump converter
  • Servo amplifier
  • Servo converter
  • Servo drive
  • Speed controller
  • Speed setting
  • Variable speed starter


from the following manufacturers:

Manufacturer overview catalogue Frequency converter = <1 kv:

  • ABB
  • Eaton
  • KEB Automation
  • Maico
  • Mitsubishi
  • Omron
  • Rockwell
  • Schneider Electric
  • Siemens
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