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Inverter drives, also known as adjustable speed drives, variable frequency drives (VFD), or AC drives, are devices that convert AC power to DC power, allowing precise control of motor speed and output. These versatile devices enable users to adjust motor operations to match specific needs, significantly enhancing efficiency and reducing electrical energy waste across various applications. Inverter drives are critical in applications ranging from small electronics to large industrial machinery, facilitating optimal performance with reduced energy consumption.

Inverter drives are available in [single-phase](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294843077) or [three-phase models](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294737501), catering to different power requirements. They also come with different IP ratings, which indicate their degree of protection against environmental factors (see our [guide for more details on IP ratings](https://au.rs-online.com/web/content/discovery/ideas-and-advice/ip-ratings)).

## **How Do Inverter Drives Work?**

Inverter drives are controlled by inputting specific frequencies or parameters into the device. This allows for greater control over your machinery and operations with more precision. Inverter drives are situated between an electrical supply and a motor, with the inverter allowing the power to be regulated to suit the application.

The working principle of an inverter drive involves several key components: a rectifier unit, a DC intermediate circuit, and an inverse conversion circuit. Initially, power enters the AC drive and reaches the rectifier unit where AC voltage is converted to DC voltage. This can be a unidirectional rectifier, which only draws energy from the electrical network to run the motor, or a bidirectional rectifier, capable of also converting mechanical energy from the motor back into the electrical system.

After conversion to DC, the voltage passes through the DC intermediate circuit, which stabilises and smoothens it before it reaches the inverse conversion circuit. Here, the DC voltage is converted back to AC, but with the ability to adjust the frequency and voltage according to the operational demands. By controlling the output voltage frequency, the speed of the motor can be precisely managed, allowing for variable speed control based on the requirements of the task at hand. This adjustment process is typically managed via an operator interface, providing seamless control over motor speed and enhancing the efficiency and effectiveness of motor-driven applications.

## **Benefits of Inverter Drives**
- Control small appliances such as desk portable fans or pump loads
- Larger appliances such as high torque machine control
- Digital operation LED input screens (for easy parameter setting, input and monitoring)
- Compact and sleek design
- Easy installation
- Emergency stops
- Energy-saving

## **Applications of Inverter Drives**

Inverter drives are integral in a multitude of industrial applications, particularly where precise control of motor speed and torque is crucial. Their versatility allows them to be employed effectively in both simple and complex machinery:

- **Small Appliances:** In settings like home and office environments, inverter drives manage the operational speeds of devices such as fans, ensuring optimal airflow with efficient energy use.
- **Pump Systems:** They adjust the flow and pressure in pumps, commonly used in sectors such as water management, HVAC systems, and chemical processing, enhancing system responsiveness and energy efficiency.
- **High Torque Applications:** Inverter drives are crucial in heavy industrial environments where they control high torque machines, such as mixers and extruders in manufacturing plants, allowing for precise performance adjustments based on real-time production requirements.

## **How to Order Inverter Drives From RS**

[RS](https://au.rs-online.com/web/) is a renowned supplier and distributor of inverter drives, tailored to meet the needs of any industrial, commercial, or project-specific application. We offer a wide selection of inverter drives from top brands including [RS PRO](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4291780588), [Danfoss](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294966811), [Eaton](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294966708), [Omron](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294965904), [Schneider Electric](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294965589), and [Siemens](https://au.rs-online.com/web/c/automation-control-gear/electric-motors/inverter-drives/?applied-dimensions=4294965546). This diverse range ensures that you can find the ideal solution for precise control of motor speed and torque across various applications.

## **Delivery Information for Australia**

To ensure timely delivery of your inverter drives, please place your orders by 5 pm AEST from Monday to Friday. We offer next working day delivery for items that are stocked locally, although delivery times may be extended in some regional areas. For a comprehensive overview of all our delivery services, including special options like same-day delivery and consolidated shipments, please visit our [delivery information](https://au.rs-online.com/web/content/support/all-articles/delivery) page.



Explore RS's selection of inverter drives and single-phase VFD for precise motor control from renowned brands like Siemens & Omron. Shop online today!

Inverter Drives | VFD Variable Frequency & Speed Drives

Inverter Drives

Shop our range of Variable Speed Drives. Browse our latest Variable Speed Drives offers. Find out more today at RS.

Variable Speed Drives | RS

VSD (Variable Speed Drives) drives change the speed of a motor by changing the input voltage and can be used with both AC and DC motors. VSD drives supply specific amperage and voltage to a motor. By adding a VSD to an AC motor, speed can be varied with precision.In HVAC systems, these variable speed drives are used primarily to control fans in variable air volume systems. They are energy efficient and can help reduce noise generation.Applications<ul><li>Fans</li><li>Pumping Systems</li><li>HVAC Systems</li><li>Air Compression Systems</li></ul>FAQQ: What is the difference between VSD (variable speed drive) and VFD (variable frequency drive)?A: Variable speed drive refers to AC and DC drives whereas the variable frequency drive only applies to AC motors;

Shop our range of VFDs. Browse our latest VFDs offers. Find out more today at RS.

VFDs | RS

VFD (Variable Frequency Drives} control the speed of a motor, but they do so by changing the voltage and frequency and can thus only be used with AC motors. VFDs can vary speed control at start-up, during the run, and at motor stop. VFDs are mainly used in three different kinds of systems, which are AC motor controllers, driver/operator interface, and speed control.Applications<ul><li>Conveyer systems</li><li>Pump Speeds</li><li>Blower Speeds</li><li>Pharmaceutical Industry</li><li>Gas Industry</li></ul>;FAQQ: What is the difference in VFD (variable frequency drive) and VSD(variable Speed drive)?;A: Variable speed drive refers to AC and DC drives whereas the variable frequency drive only applies to AC motors.&quot;

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ABB Inverter Drives | RS

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Danfoss Inverter Drives | RS

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Omron Inverter Drives | RS

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Danfoss Inverter Drives

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