Woodward 9906-061 | Governor | Controller | Potential Converter
1.9906-061 Product Overview
The Woodward 9906-061 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. 9906-061 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 9906-061 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.
What are the parameters of stepper motor drivers? Common faults and maintenance of stepper motor drivers
What are the parameters of stepper motor drivers
The basic parameters of the stepper motor driver are as follows:
a、 The power supply can be selected according to the power specifications of the stepper motor being driven.
For AC power supply, such as AC80V, 220V mains power can be supplied to the driver through a step-down transformer.
When selecting a transformer, both voltage and current operating parameters must be considered simultaneously.
If the current value is 3A, the apparent power value obtained from the formula 80V × 3A=240VA cannot reach the actual output
capacity of 3A. The calculation result should be multiplied by a coefficient of 1.5 or more,
and a transformer with 220/80V and 400VA or more should be selected as the power input. The power supply of a two-phase
motor is generally 12-48V,
b、 Output current value. The product labeling value is often the peak energy output capability. When selecting, the minimum
should be at least twice the rated current value of the stepper motor.
The gear of the output current is usually manually set by the dip switch on the control panel, such as 0.9A-3A. This is also
an overload protection setting, and the setting value can refer to the working current value of the stepper motor. Generally, there are 8 levels of grading.
c、 Excitation methods: full step, half step, 4-step, 8-step, 16-step, 32-step, 64 step. Half step is actually a 2-level subdivision,
the higher the subdivision level, the smaller the step torque angle, and the lower the motor speed. The control panel of the stepper
driver is also equipped with a subdivision dip switch, and the subdivision values are also set.
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