9905-059 Woodward speed control module

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Product basic information
Manufacturer: Woodward
Model: 9905-059
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
9905-059 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 9905-059 controller debugger module Motor touch screen WOODWARD

9905-059 Woodward speed control module

The 9905-059 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 9905-059
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:
- 9905-059 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.

The difference between BLDC driver and servo motor driver

BLDC drivers and servo motor drivers are two different types of motor drivers, and there are some differences in their working principles, application scenarios, and performance characteristics.

1. Working principle:

-BLDC driver (brushless DC motor driver): The BLDC driver drives the brushless DC motor through an electronic commutator. Based on the feedback of the motor rotor position and speed,

it uses electronic means to control the commutation in real time, thereby ensuring the smooth operation of the motor.

-Servo motor driver: The servo motor driver performs closed-loop control with the controller through position, speed, or torque feedback signals to achieve precise position and speed control.

2. Application scenarios:

-BLDC driver: suitable for applications that require high efficiency, low noise, long lifespan, and a high speed range, such as electric vehicles, drones, robots, etc.

-Servo motor driver: suitable for applications that require high-precision position and speed control, such as CNC machine tools, automation equipment, precision instruments, etc.

3. Control mode:

-BLDC driver: usually adopts open-loop control, which directly drives the brushless DC motor to rotate according to the preset control signal.

-Servo motor driver: Adopting closed-loop control, it compares the actual position, speed, or torque with the target value by cooperating with feedback devices (such as encoders),

and feeds back control signals based on the difference to make the motor motion more accurate and stable.

4. Performance characteristics:

-BLDC driver: It has the characteristics of high efficiency, high torque density, strong reliability, and wide adaptability, but usually requires relatively low control accuracy.

-Servo motor driver: It has the characteristics of high precision, high dynamic performance, and good position control stability, but it is relatively complex and costly.

It should be noted that there may be some cross application between BLDC drivers and servo motor drivers, and the appropriate driver type should be selected based on specific application and technical requirements.

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: 9905-059 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).
9905-059 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9905-059Suitable 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.