9907-1207 Woodward speed control module

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Product basic information
Manufacturer: Woodward
Model: 9907-1207
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
9907-1207 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 9907-1207 controller debugger module Motor touch screen WOODWARD

9907-1207 Woodward speed control module

The 9907-1207 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 9907-1207
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:
- 9907-1207 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.

Application scenarios

Sine wave controllers are mainly used in applications that do not require high control accuracy, such as household appliances, electric bicycles, small motors, and other fields.

In these fields, the control accuracy and performance requirements of motors are relatively low, and sine wave controllers can meet basic needs.

4、 The difference between vector controller and sine wave controller

Difference in working principle

Vector controller is based on vector control theory, which achieves precise control of the motor by controlling the motor vector; The sine wave controller controls the motor by directly

controlling the three-phase sine wave signal. There is a fundamental difference in the working principle between these two control strategies.

Differences in Control Performance

Vector controllers have good control performance in motor starting, stopping, acceleration and deceleration, and can achieve smooth and accurate operation control; The control

performance of sine wave controllers is relatively low, limited by the limitations of control algorithms, and cannot achieve the control accuracy of vector controllers. In complex operating conditions,

the performance of sine wave controllers is relatively limited.

Differences in application scenarios

Vector controllers are suitable for high-performance motor applications, such as industrial automation, precision machinery, aerospace, and other fields; Sine wave controllers are mainly used in applications that do not require

high control accuracy, such as household appliances, electric bicycles, small motors, and other fields. There are significant differences between these two control strategies in application scenarios.

Difference between Cost and Complexity

Due to its higher control accuracy and performance, vector controllers have relatively complex hardware structures and control algorithms, and also have higher costs; The sine wave controller

has the advantages of simple structure and low cost. In practical applications, it is necessary to choose appropriate control strategies based on specific needs and budgets.

5. Conclusion

Vector controllers and sine wave controllers both play important roles in the field of motor control. They each have unique working principles, control performance, and application scenarios.

In practical applications, we need to choose appropriate control strategies based on specific needs and budgets. Meanwhile, with the continuous development of technology, these two control strategies will also be continuously

optimized and improved, making greater contributions to the development of the motor control field.

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: 9907-1207 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).
9907-1207 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9907-1207Suitable 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.