Woodward 9907-205 from SAUL ELECTRIC | In Stock
1.9907-205 Product Overview
The Woodward 9907-205 belongs to the 505/505E series digital turbine controllers. It is a microprocessor-based control module designed for single-valve steam turbines,
including single extraction/admission systems or split-range actuator configurations.
The controller features a front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad, allowing easy on-site configuration and monitoring.
2. 9907-205 Technical Specifications and Parameters
| Parameter | Details |
|---|---|
| Power Supply | +24 VDC, approx. 1 A |
| I/O Outputs | Discrete Outputs: 8 Analog Outputs: 6 Actuator Outputs: 2 |
| Display / HMI | Two-line, 24-character LCD, with multi-function keypad |
| Dimensions | Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm) |
| Weight | Approx. 9.11 lbs (4.13 kg) |
| Operating Temperature | –4 to +140 °F (–20 to +60 °C) |
| Storage Temperature | –40 to +185 °F (–40 to +85 °C) |
| Humidity Standard | 95% RH at 20-55 °C for 48 hours without damage |
| Protection Class | Typically meets industrial dust and water protection standards |
| Communication Protocol | Supports Modbus, RS-232 / RS-422 serial interfaces |
3. Brand History
Woodward, Inc., founded in 1870 and headquartered in Fort Collins, Colorado, USA, is a global leader in energy control systems. The company has a long history of innovation in turbine control, engine management,
and power generation systems.
Woodward products are widely recognized for their reliability and precision in demanding industrial and power generation applications.
4. Applications in Industrial Automation
The 9907-205 plays a critical role in industrial automation and power generation environments:
- Steam Turbine Control: Manages startup, speed regulation, and extraction/admission control of steam turbines.
- Power Generation Systems: Used in power plants to regulate turbine-driven generators for stable frequency and load management.
- Compressor and Pump Drive Control: Ensures precise speed control for turbine-driven compressors and pumps.
- Process Industry Applications: Applied in chemical plants, refineries, and other industries requiring precise turbine operation.
- Safety and Protection Functions: Includes overspeed protection, critical speed avoidance, actuator travel limits, and event logging for operational safety.
Speed regulation method of stepper motor driver _ The role of stepper motor driver
Speed regulation method for stepper motor driver
With the rapid development of power electronics technology, the performance indicators of variable frequency speed regulation
can fully reach or even exceed those of DC motor speed regulation systems. The stepper motor driver adjusts the speed of the
stepper motor by adjusting the pulse frequency of the input driver and the subdivision parameters of the driver, which is actually
controlling the number of steps of the stepper motor per unit time.
1、 Changing the number of pole pairs for speed regulation: Advantages: ① No additional slip loss, high efficiency; ② The control
circuit is simple, easy to maintain, and has a low price; ③ Cooperating with stator voltage regulation or electromagnetic differential
clutch can achieve smooth speed regulation with high efficiency. Disadvantages: Stepwise speed regulation cannot achieve seamless
speed regulation, and due to limitations in motor structure and manufacturing processes, only 2-3 pole pairs of stepped speed regulation
can usually be achieved, with a relatively limited speed range.
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