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WHY TO USE FREQUENCY INVERTER - VARIABLE SPEED DRIVES
Frequency inverters or variable speed drives are electronic devices
that let you control the speed of an AC motor. Background: If electric motors or AC motors are operated directly from an AC voltage supply system, they can only avail of a fixed speed based on the number of poles and the supply frequency of the power supply system on location. If, however, an application or production process requires an adjustable AC voltage (that is, a controllable speed), frequency inverters are used. These frequency inverters can generate an AC voltage that is variable in amplitude (the output voltage level) and frequency from a constant AC voltage.
How does a frequency inverter work?
A frequency inverter also variable speed drive is therefore connected upstream of a motor to generate an AC voltage that can be adjusted to meet customer requirements. The power supply system then no longer generates the frequency and voltage level with which the motor operates. Instead, the frequency inverter takes over this task and controls the output frequency and output voltage.
What is the major advantage of the frequency inverters - variable speed drives?
You can use it to seamlessly change the speed of a motor from practically zero to your required nominal speed and have access to a significantly greater speed range. The torque of the motor remains unchanged. Plant operators can therefore adapt their drive technology to the conditions they require at any time. A frequency inverter also allows you to directly switch the direction of rotation. A simple control command is sufficient to change the phase sequence. The downstream AC motor then turns in the opposite direction.
Where are frequency inverters used?
Frequency inverters are used in a huge variety of industrial sectors and applications. Whether in drives for pumps and fans, processing machines, conveyor belts and assembly lines, or cranes and handling systems: Frequency inverters are now indispensable in industrial production. In that sector, an adapted or infinitely variable speed allows for optimized production processes – alongside the additional benefit that drives with speed control ensure energy-efficient operation.
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INDUSTRIAL AUTOMATION PRODUCT
Solenoid valves, pressure switches and transmitters, temperature switches
Danfoss Industrial Automation is a leading global player within the development and production of fluid controls and pressure and temperature controls. Since 1933, the extensive know-how within Danfoss has made modern life easier and we continue to break new ground in our core business areas. Every day, more than 250,000 items are produced at 70 factories in 25 countries. Building strong partnerships is of great importance to us, because it is purely by understanding our customers’ needs that we can meet the expectations of tomorrow. This is also true in Danfoss Industrial Automation they are dedicated to focus on the industrial world of today. Through us, you gain access to the entire Danfoss pool of technologies, with special emphasis on pressure and temperature sensors and controls. We offer safer, more reliable and more efficient solutions in a close cooperation based on firm values.
Danfoss solenoid valve bodies and electrical coils are normally supplied separately and then combined.They are assembled quickly and simply without tools, providing optimum product flexibility and availability. If a coil does need to be replaced, it can be done without stopping or draining any system.The solenoid valves are also available as assembled units if required.
Danfoss pressure transmitters help you keep demanding industrial processes under control. Accurate, robust and built for long life, they perform reliably day after day, even in the harshest environments.
Thermostatic valvesare a simple and reliable control solution requiring neither electricity nor control air. An example of application is automatic control of water temperature in cooling systems.The valves are available with remote or built-in sensor.
The range of differential pressureswitches includes components for general industrial use as well as specialised switches for demanding applications
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