Power electronic control

... active power flow control. Several other power electronic controllers have been built to provide adaptive control to key parameters of the power system besides voltage magnitude, reactive power ... 1995). Fig. 1.11 One phase of a series capacitor. (a) mechanically controlled; and (b) electronically controlled. Power electronic control in electrical systems 13 //SYS21/F:/PE...

Ngày tải lên: 16/02/2014, 20:20

... switch, S1, is FIGURE 1.26 Phase-controlled, fully controlled three-phase ac voltage controller. 18 CHAPTER 1 / POWER ELECTRONIC CONVERTERS Control in Power Electronics Selected Problems chopping, ... types of voltage control are phase control and pulse width modulation. The phase control consists of delaying States 1 FIGURE 1.1 Generic power converter. 2 CHAPTER 1 / POWER...

Ngày tải lên: 05/03/2014, 09:43

... loads. The controlling of compensation devices could be implemented by power electronics structures controlling the firing angle of thyristor. In the next section, we introduce a power electronic ... electronic structure to control firing angle α of thyristor. 2. Power electronic structure for controlling firing angle α of thyristor 2.1. Controlling block diagram The contro...

Ngày tải lên: 05/03/2014, 14:20

... speed limit. The two main controls that Practical Variable Speed Drives and Power Electronics  are used to control the speed are the accelerator, which controls the driving torque, ... SpeedTorque Power × = Alternatively, Practical Variable Speed Drives and Power Electronics  min)/rev( (kW) 5509 (Nm) Speed Power Torque × = • Energy Energy is the pr...

Ngày tải lên: 08/09/2013, 21:03

Ngày tải lên: 15/10/2013, 16:12

Ngày tải lên: 15/10/2013, 16:37

... [1]. However, most power electronics converters are circuits with controllable voltage output. To achieve current control, the voltage of the power electronics converter can be controlled in such ... modulation (PWM) is the method of choice to control modern power electronics circuits. The basic idea is to control the duty cycle of a switch such that a load sees a controllable aver...

Ngày tải lên: 17/10/2013, 11:15

... power, and high power capability. DC drives and motors from a few horsepower to hundreds of horsepower could be operated and controlled efficiently in all four quadrants when powered by three-phase ... be controlled. Systems up to several horsepower were successfully applied to DC motors using permanent magnet fields. The power dissipated by the transistor when gated-on is minimal and the...

Ngày tải lên: 19/10/2013, 18:15

... standard control techniques as current-mode control. However, for Cúk and SEPIC converters a reduced-order sliding-mode control can be used with satisfactory performances with respect to standard control techniques ... the converter operating point. Multiloop control techniques, such as current-mode control, have greatly improved power converter dynamic behavior, but the control...

Ngày tải lên: 19/10/2013, 18:15

... comparison of vector control and direct torque control of an induction machine, in Power Electronics Spec. Conf., 1, 421–426, 2000. © 2002 by CRC Press LLC 11.2 Scalar Induction Machine Control Induction ... time constant tuning in indirect field oriented control, in Power Electronics Spec. Conf., 573–580, 1990. 14. D. M. Brod and D. W. Novotny, Current control of VSI-PWM inv...

Ngày tải lên: 23/10/2013, 16:15