Inverter Drives

Inverter drives, also known by various names such as adjustable speed drives, adjustable frequency drives, variable frequency drives, variable speed drives, frequency converters, inverters, and power converters, offer advanced control over machinery speeds. These devices convert AC power to DC, enabling precise adjustment of output. Whether you're looking to enhance efficiency, reduce electrical waste, or gain superior control over your operations, RS’ selection of VFDs caters to every need.

How Do Inverter Drives Work?

Inverter drives are pivotal in managing and controlling the operation of electrical machinery with precision. Positioned between the electrical supply and the motor, they function by allowing users to input specific frequencies or parameters. This tailored input modifies how the motor operates, enabling precise control over speed and power output according to the application’s demands. By regulating the electrical current that reaches the motor, variable frequency drives optimise the operational efficiency and performance of your equipment, making them indispensable in industrial settings. Explore our Introduction to Inverter Drives to learn more about their role in motor control.

What is the Difference Between VSD (Variable Speed Drive) and VFD (Variable Frequency Drive)?

Understanding the distinctions between Variable Speed Drives (VSD) and Variable Frequency Drives (VFD) is crucial for selecting the right equipment for your needs. VSDs primarily modify the speed at which driven equipment operates without changing the motor’s inherent speed, which remains constant. This makes VSDs suitable for applications where precise speed control is less critical.

On the other hand, VFDs adjust the motor's speed by altering both the voltage and frequency delivered to the motor's stator. This capability allows VFDs to offer versatile speed control at various stages, including startup, during operation, and when stopping the motor. This adaptability makes VFDs ideal for applications requiring meticulous control over motor speed and torque, enhancing both performance and energy efficiency.

Types of Inverter Drives

RS offers a diverse range of frequency drives to accommodate different industrial requirements, ensuring that you find the perfect match for your specific applications. Here’s a breakdown of our available types:

Single Phase VFDs

Ideal for smaller or residential applications, these VFDs operate efficiently with single-phase power supply, providing reliable performance for light commercial and domestic uses.

Three Phase Inverter Drives

Designed for high-demand industrial environments, three-phase frequency drives handle complex applications with ease, offering robust power handling capabilities.

General-Purpose Inverter Drives

Versatile and widely applicable, these adjustable frequency drives are suitable for a vast array of applications, ensuring optimal performance across a range of operations.

Compact Inverter Drives

Perfect for tight spaces, these frequency drives offer the full functionality of standard drives but in a smaller, more manageable size, making them ideal for installations with limited room.

Regenerative Inverter Drives

These adjustable frequency drives are capable of recapturing energy that would otherwise be lost during braking or deceleration phases, converting it into reusable power, which enhances overall energy efficiency.

High-Performance Inverter Drives

For applications demanding the highest level of control and performance, these adjustable frequency drives offer advanced features that support complex functions and high precision.

For detailed guidance on choosing the right IP rating for your frequency drive, explore our comprehensive IP Ratings Guide.

Features of Variable Frequency Drive

Variable Frequency Drives (VFD) are engineered with a suite of features designed to enhance performance and user experience in industrial settings:

• Control Flexibility: VFDs are versatile enough to manage small appliances like desk fans or larger, more demanding equipment such as high torque machines.
• Digital Operation: Equipped with LED input screens, VFDs allow for easy setting adjustments, real-time parameter monitoring, and streamlined operation management.
• Compact Design: The sleek, compact build of VFDs ensures they fit seamlessly into various setups, aiding in installations where space is at a premium.
• Easy Installation and Maintenance: Designed for user-friendly installation, frequency drives also feature straightforward maintenance protocols to ensure they operate efficiently for longer.
• Emergency Stop Features: Safety is a priority with built-in emergency stop functions that ensure quick shutdowns to prevent accidents and equipment damage.
• Energy Efficiency: By optimising operational efficiency, VFDs contribute to significant energy savings, reducing overall operational costs.

Applications of Frequency Drives

Frequency drives play a crucial role across a wide spectrum of industries, enhancing efficiency and precision in numerous applications. These drives are especially beneficial in scenarios that demand exact control of motor speed and torque. Here’s how adjustable frequency drives are employed across different sectors:

• HVAC Systems: Frequency drives regulate fans, pumps, and compressors, improving energy efficiency and system responsiveness.
• Manufacturing: From assembly lines to heavy machinery, frequency drives adjust speeds dynamically, enhancing productivity and reducing wear.
• Water Management: In applications like pumping stations, variable frequency drives optimise flow rates and pressure, significantly reducing energy consumption.
• Automotive Industry: Used in testing and conveyor systems, these VFDs ensure precision and can adapt quickly to different operational demands.
• Food and Beverage: Adjustable frequency drives help maintain the integrity of processes by ensuring consistent speeds during mixing, packaging, and processing.

Optimise Your Machinery with Advanced Inverter Drives!

RS is a trusted supplier and distributor of high-quality VFDs, committed to enhancing operational efficiency across various industrial sectors. Explore our extensive selection from leading brands such as Siemens, Schneider Electric, and Omron, ensuring you achieve precise control and energy efficiency with state-of-the-art technology.

Ordering & Delivery Information for New Zealand

RS is committed to delivering fast and dependable service throughout New Zealand. Our vast array of automation and control gear components, including single-phase motor starters and proximity sensors, is designed to meet your requirements. For detailed insights into our delivery practices, scheduling, and potential costs, please refer to our Delivery Information page.