Woodward 8915-111 from SAUL ELECTRIC | In Stock
1.8915-111 Product Overview
The Woodward 8915-111 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. 8915-111 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 8915-111 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.
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.
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