What aircraft uses a CSD?
On aircraft such as the Airbus A310, Airbus A320 family, Airbus A320neo, Airbus A330, Airbus A330neo, Airbus A340, Boeing 737 Next Generation, 747, 757, 767 and 777, an integrated drive generator (IDG) is used. This unit is simply a CSD and an oil cooled generator inside the same case.
What is a CSD and IDG?
Integrated Drive Generator (IDG) The integrated drive generator (IDG) consists of a Constant Speed Drive (CSD) and AC generator mounted side by side in a single housing. The CSD performs the operation by controlled differential action to maintain the constant output speed required to drive the generator.
How does a variable speed generator work?
The output power of a variable speed generator depends directly on the speed of the motor. When the motor speed is too low for the power demand, the output voltage of the generator is decreased. The drop voltage is detected and the input current of the Xtender is diminished to stabilize the voltage.
What is the main purpose of the constant speed drive unit CSDU in an AC power generating system?
A unit called a constant-speed drive (CSD) is used to ensure the alternator rotates at the correct speed to ensure a 400-Hz frequency. The CSD can be an independent unit or mounted within the alternator housing.
What is aircraft engine IDG?
The IDG(Integrated Drive Generator) is an aircraft power generation device which houses a Continuously Variable Transmission(CVT) to generate 400Hz constant frequency power regardless of the engine speed.
Where is the IDG located?
The Integrated Drive Generator system, or IDG, is a key power system found on aircraft that controls all of the engine hydraulic systems. An IDG consists of a Constant Speed Drive (CSD) and AC generator mounted side by side in a single housing assembly.
What is variable speed engine?
Variable speed technology allows the speed of an engine to be regulated and adjusted according to the electrical load that is connected, which makes it more economical to run.
How does the speed of the generator change with wind speed?
This figure illustrates also another feature of variable speed turbines: generator’s speed is four times lower at the cut-in wind speed than at the rated velocity. The wind velocity determines the rotational speed of the wind turbine and the generator. The rated speed corresponds to wind velocity with maximum energy.
What does a variable speed drive do?
Variable speed drives (VSDs) A VSD controls the speed and torque of an AC motor by converting fixed frequency and voltage input to a variable frequency and voltage output. System performance can be greatly improved by controlling speed to precisely match the load.
Why is a constant speed drive used to control the speed of some aircraft engine driven generators?
Why is a constant-speed drive used to control the speed of some aircraft engine-driven generators? So that the frequency of the alternating current output will remain constant. Electric motors are often classified according to the method of connecting the field coils and armature.
Why do we need a variable speed turbine?
Variable speed turbines are designed to operate at a wide range of rotor speeds, and have less dynamic load on the electrical and mechanical systems. For variable speed turbines with a gearbox transmission, there are serious risks of severe rotor shaft vibrations. These vibrations can be reduced with the generator torque.
How does pitch control work in a variable speed turbine?
In a variable-speed turbine, pitch control comes into play in operating Region 3, where again the electrical power is at rated levels. As the wind speed varies, the power produced will vary roughly as the cube of the wind speed.
What is the rotational speed of a turbine?
The turbine data refer to NREL’s CART design. The goal of this controller is to regulate rotational speed to 41.7 rpm (rated speed for the CART). Since this is a typical disturbance attenuation problem, the disturbance to output transfer function of Figure 22 is found by plugging in the controller transfer function into eqn [9],