Can A Powerflex 525 Be Used For Motor Torque Control

Hardware Comparing: PowerFlex 525 vs 755

PowerFlex depression voltage Ac drives tin can exist used in a broad variety of control solutions. The PowerFlex family unit of controllers ranges from low end applications for more than simple control needs to more advanced and feature rich models that increase capabilities such equally precise positioning and advanced torque command.

The PowerFlex family is also easy to program and configure and offers the familiarity of a mutual user feel regardless of the model selected. This is true for both compact PowerFlex drives used in elementary applications at the motorcar level or in stand up alone configuration as well as for architecture sized models with more advanced features and precision built for integration into a factory level or product line control system.

The result of this level of flexibility and common software utilization means that the PowerFlex family offers many advantages such as:

Low Cost – The range of functionality is so broad along the PowerFlex family that you can choose the right packet of functionality for the best ROI without adventure of being over or nether-powered.
System Integrity – All PowerFlex models feature advanced diagnostics and alerts for irregular conditions.
Fast Fourth dimension to Marketplace – Software that is consistent and standard among all models means PowerFlex models tin can be configured easily and quickly to go the system upwards and running fast.

These advantages mean that the PowerFlex line offers scalability as the system grows. For this guide, we volition expect at the PowerFlex 525 and PowerFlex 755 controllers.

PowerFlex 525 and 755 Comparison

Differences and Functional Similarities

The biggest distinction betwixt the PowerFlex 525 and the PowerFlex 755 is that the 525 is a modular compact version, near suitable for standalone, machine level and smaller and simpler integrations. On the other hand, the 755 is part of Allen Bradley's architecture form designed to integrate into larger production line o0r establish-wide command systems. Both are modular and are rated for rugged applications depending on the enclosure chosen.

Regardless of the model, all of Allen Bradley's PowerFlex family members uses an open up network architecture. This allows for apply of common industrial protocols (CIP) with common feature sets. Because CIP can be used with EtherNet/IP, DeviceNet and ControlNet, the PowerFlex family allows for collection, control and configuration of data on a single network, increasing its interoperability over a single network and allowing the user to realize higher ROI for a control arrangement.

However, there are differences betwixt the two models. Understanding these differences in functionality and capability will help you choose the right model for your command system.

Power Rating – The PowerFlex 525 is rated in four categories: 100-200V, 200-400V, 380-480V and 525-600V. This allows for control of motors from as low as 1.5 HP to as high as 30 HP. Considering the PowerFlex 755 is built for architecture level system construction, it offers a higher range of power ratings starting at 380 V. The ratings for the 755 are: 400-480V, 500-600V and 600-690V for robust motors with HP as high as 2000.
Motor Control – Both the 525 and 755 allow for V/Hz control for both constant and variable torque using a VFD. V/Hz motor control is a cost effective and simple for a bones VFD schema. For applications where constant torque is required, both the 525 and 755 allow sensorless vector control and both also allow Closed Loop Velocity Vector Control for applications where precise speed control is needed. The differences in motor control includes the PowerFlex 525's allowance of permanent magnet motor control while the 755 offers both a surface mount and an interior permanent magnet in both "with encoder" and "without encoder" format.
Enclosures – Because the 755 is used in larger architectural applications, it is bachelor in more than enclosure types including flange mount, IP00/IP twenty UL, IP 54 UL type 12, IP 20 UL type 1 with chiffonier and IP 54 UL blazon 12 with cabinet. The PowerFlex 525 is only offered in IP 20 UL open type and IP 30 UL type 1.
Safety – Both the 525 and 755 utilize Safe Torque-Off with the 525 utilizing PLd/SIL2 Cat 3 and the 755 using PLe/SIL3 Cat 3. Withal, the 755 also offers the Prophylactic Speed Motor PLe/SIL3 True cat 4, a characteristic not offered past the 525.
Applications – Because it is used for more complex integrated systems, the PowerFlex 755 is designed for a larger number of applications. These include both open and closed loop speed regulation, precise torque regulation, precise torque and speed regulation, and accurate positioning. By contrast, the PowerFlex 525 is simply used in applications requiring open and closed loop speed regulation.
Communication – Both the PowerFlex 525 and the PowerFlex 755 have an embedded EtherNet/IP port. Both besides have capability to expand via dual port carte for EtherNet/IP also. Both the 525 and 755 do good from modularity and provide boosted communications protocols if needed through add on. These include DeviceNet, Profibus, USB and others. However, the 755 offers more than advice modules such every bit ModBus, Profinet, and ControlNet and several specialized modules for applications such as HVAC. The 755 also has modules available for remote I/O communication also.
I/O – The PowerFlex 525 offers multiple I/O options that include seven digital inputs with two digital outputs. It also includes 2 analog inputs and 2 analog outputs and 2 relay outputs. The PowerFlex 755 offer 6 digital inputs with 3 digital outputs and ii analog outputs.
User Interface – Both models let intuitive and easy to configure Human being Interface Modules (HIM). The PowerFlex 525 can let HIMs every bit unproblematic as a v-digit, xvi segment LCD display with both local and remote keypad. It also allows MainsFree programming via USB as well equally the Studio 5000 platform. It tin also be configured with the Connected Components Workbench (CCW). The PowerFlex 755 also works with the Studio 5000 and Connected Components Workbench (CCW). However, the 750 is likewise compatible with both local and remote PowerFlex 750 series HIMs.
Programming and Configuration – Because both the 525 and 755 apply the Studio 5000 programming environment, design and configuration are made easier. It allows for use of both embedded instructions as well every bit customized profiles during configuration. For example, the 525 allows for dynamic descriptions when configuring via HIMs so users demand non spend fourth dimension scrolling through manuals. It allows both models to integrate into the Logix surroundings to integrate betwixt other components fully and intuitively inside the command arrangement. The same is true for the ii model's reliance upon the Connected Components WorkBench (CCW. By using the CCW software, the 525 and 755 can be linked to other devices such every bit Micro 800, PanelView HMIs and more than.

Accented Differences

Diagnostics – One key deviation between the 525 and the 755 is the presence of diagnostic capability for the PowerFlex 755. In today'south connected manufacturing plant environment, many Industrial Net of Things (IIoT) platforms offer the ability to implement predictive maintenance based on machine performance. The analytics adequacy of the 755 is aligned with these value propositions and can aid integrate the controller into a connected environment to help clarify and monitor auto behavior for optimized maintenance. The 525 does not take this capability.
Precision – The PowerFlex 525 is designed for smaller applications, standalone controls and machine level controls in simple control systems. It is also less powerful and is only rated for motors up to 30 HP. The 755 has avant-garde diagnostics and is rated for more than complex systems and larger motors upwardly to 2000 HP. And unlike the 525, the 755 is designed to control precise positioning, high torque and more controllable torque and speed ramp ups and wearisome downward than the 525.
Model Variants – The PowerFlex 525 is versatile in that information technology can be mounted sideways, upside down and wherever information technology is needed. Equally a result, it has only two enclosures and can be placed close to the machine or the system depending on space and requirement. However, in that location are no major variants of the 525 itself. The PowerFlex 755 has 5 unlike enclosures as it is ofttimes used equally part of a larger control system. The 755 also has model variations designed for specific applications and dedicated control system needs.
- 755TL, 755TR, 755TM – The 755T is designed for systems that require depression harmonics. It is also used in systems that require regeneration of upwardly to 4000 kW. It tin can evangelize total harmonic distortion levels to less than 5% and has adaptive control functions that monitor automobile behavior and automatically adjust and compensate for changes. This includes real-time health status of equipment as well as capability to predict the remaining lifecycle of critical components. This aligns the 755T with the predictive maintenance capabilities of the 755 series in general. Nevertheless, the 755T can monitor a larger number of variables and predict when they volition require replacement. The 755TL is used to attain low harmonic. The 755 TR is used for situations when dissipated energy tin can be used for other functions. And the 755TM is used in applications where the control system requires a single charabanc system for all power.
- Frames– Similar the PowerFlex 525, the PowerFlex 755 series is modular in its ability to add functional modules for added capability. However, unlike the 525, the 755 achieves its increasing horsepower functionality past adding frames. This means that the cost of the 755 can be controlled based on the rated horsepower of the motor information technology is controlling. A single 755 is used in one frame for upward to 700 HP. 2 755s are used for HP ranging from 600-1350. And three 755s are used for HP ranging from 1100-2000 HP. This allows the user to deploy just the drives needed based on HP thus decision-making both infinite and cost.
- Flooring Models – The 755 series also come in floor models as well as mountable. These models can be fan cooled and the cooling monitored as function of the bulldoze's functionality. The 755 series is also rollout to make service, installation and programming easier. Floor mounted models tin can also accept either Ac power or may exist powered on a common DC bus duct. Flooring mounted 755s besides come with replaceable surge protectors and when rolled out, field power connection remains in place. Finally, information technology is possible to roll out only the inverter while the converter and control stays in the cabinet. Considering of its modest size and ability to exist placed in more versatile positions, the PowerFlex 525 does non possess these capabilities.

The PowerFlex 525 and PowerFlex 755 past Allen Bradley evangelize powerful control functionality in toll effective packages that allow you to pattern and deploy a control solution quickly.

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Posted on: January 8, 2021

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