5461-622 Woodward speed control module

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Product basic information
Manufacturer: Woodward
Model: 5461-622
Belonging to the famous 505 series
Supports multiple communication protocols and can be smoothly integrated with the existing control system of the factory
Core application: Designed specifically for speed control and protection of steam turbines
5461-622 controller has stable performance and high reliability

Categories: WOODWARD
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5461-622 Woodward speed control module

The 5461-622 is a microprocessor-based digital governor controller produced by Woodward, belonging to its classic 505 series.
It is primarily designed for speed control and protection of steam turbines. Below is a detailed introduction to this product:

I. Product Overview

Brand and Model: Woodward 5461-622
Series: 505 Series Digital Governor
Type: Microprocessor-based controller
Purpose: Specifically designed for steam turbines to control their speed and provide overspeed protection.

II. Core Functions

Speed Control:
- 5461-622 Precisely controls the speed of steam turbines by adjusting steam inlet flow.
- Supports single-range or split-range actuators to accommodate turbines of different sizes.
Overspeed Protection:
- Incorporates triple independent overspeed protection logic to ensure rapid shutdown in case of overspeed, preventing equipment damage.
- Provides an overspeed test button for convenient on-site testing of protection functions.
Emergency Shutdown:
- Equipped with an emergency stop button for immediate shutdown in emergency situations.
System Protection:
- - Automatically switches control modes upon sensor failure to ensure uninterrupted system operation.
  - Offers local/remote control priority selection to adapt to different operational scenarios.

3. Bipolar drive

The driving circuit of a bipolar stepper motor is shown in Figure 2, which uses eight transistors to drive two sets of phases. Bipolar drive circuits

can simultaneously drive four wire or six wire stepper motors. Although four wire motors can only use bipolar drive circuits, they can significantly

reduce the cost of mass-produced applications. The number of transistors in the bipolar stepper motor drive circuit is twice that of the unipolar drive circuit. The four lower

transistors are usually directly driven by a microcontroller, while the upper transistors require a higher cost upper drive circuit. The transistor of a

bipolar drive circuit only needs to withstand the motor voltage, so it does not require a clamping circuit like a unipolar drive circuit.

Stepper Driver Principle Stepper Motor Driver Selection

4. Microstep driver

Stepper Driver Principle Stepper Motor Driver Selection

Microstep driving technology is a current waveform control technology. The basic idea is to control the waveform of the current in each phase winding,

so that it rises or falls in steps, that is, to provide multiple stable intermediate states between 0 and the maximum value. During the rotation of the stator

magnetic field, there are also multiple stable intermediate states, corresponding to an increase in the number of steps and a decrease in the step angle of the

motor rotor rotation. The use of subdivision drive technology can greatly improve the step torque resolution of stepper motors, reduce torque fluctuations,

avoid low-frequency resonance, and reduce operating noise.

III. Technical Specifications

Power Supply: 18-32 VDC, supporting 24VDC input.
Display: Two-line x 24-character LED display for clear indication of operating status and parameters.
Enclosure: NEMA 4X or IEC 60529 IP56 rated for protection against harsh industrial environments.
Inputs/Outputs:
- Inputs: 6 programmable current inputs, 16 discrete contact inputs.
- Outputs: 2 actuator outputs, 8 relay outputs, 6 programmable current outputs.
Communication Interfaces: 5461-622 Supports RS-232, RS-422, and RS-485 hardware interfaces for easy integration with host computers or other devices.
Software: Equipped with OpView™ and 505View software for parameter configuration, monitoring, and fault diagnosis.
Operating Temperature: -20 to +60°C (some models support -4 to +140°F).
Storage Temperature: -40 to +85°C (some models support -40 to +185°F).
5461-622 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 5461-622Suitable for steam turbines of various sizes, including industrial steam turbines, small grid turbo-generators, and turboexpanders.
Single Extraction and Admission Applications: Designed for operating steam turbines in single extraction and/or admission applications.
On-Site Programming: Allows on-site operators to program and adjust parameters through an integrated operator control panel, adapting to different operating conditions.

V. Product Advantages

High Reliability:
- Microprocessor-based design ensures precise control and stability.
- Triple independent overspeed protection logic provides multiple layers of safety.
Flexibility:
- Supports various actuator and sensor configurations to accommodate different turbine models.
- Offers a rich set of input/output interfaces for easy system expansion and integration.
Ease of Use:
- Two-line x 24-character LED display provides an intuitive operating interface.
- A 30-key multifunctional keyboard simplifies parameter configuration and operation.
Compatibility:
- Supports multiple communication protocols for easy integration with DCS, PLC, and other systems.
- Provides OpView™ and 505View software for remote monitoring and fault diagnosis.