... enjoy!
TITLE: Best way to get distinct Indian flavor
FROM: Pradnya Joshi
DATE: 12/22/96
EMAIL: pjoshi@alpha2.csd.uwm.edu
I've noticed many postings recently on how to make authentic Indian
chai,
... (c)
Fig. 10. Phasor diagram illustrating the purpose of the MERS. (a) Equivalent
circuit of the power conversion system with MERS. (b) Phasor diagram
when the MERS is not activated. (c) Phasor diagram ... the simplicity of the control. When operated in dc-
offset mode can a phase shift of the gate signals directly
control the phase of the current [5].
C. Applications
Several types of applicat...
... the
PI controller to determine the
Æ
phase, and then it is fed to the
gate controller to generate the gate signals. A
Æ
phase limiter
is applied to keep
Æ
phase in the operating area.
V. R
ESULTS ... sensors are
used, which are fed to the control board. Phase lock loop
(PLL) technique is applied to synchronize the gate switching
time to the phase of the line voltage.
For feedback control, the...
... set-point.
• When operated in dc-offset mode, the control of gate signals will automatically control the phase
of the current [2].
Depending on the application, the control will change. Details regarding ... Illustration of load voltage control with MERS. The load voltage can be controlled by controlling the
phase of the current in relation to the connecting grid voltage.
Load control using s...
... =
˙
E − r
a
˙
I. (2)
Figure 4 shows the phase diagram of synchronous generator
with MERS. The phase of induced electromotive force
˙
E is
equal to the phase of output current
˙
I. The output ... 8. The phase of gate signals lead E by 90 electrical degrees. Where
E
0
is induced EMF at no load, and E is induced EMF at heavy load.
02040
−200
0
200
−10
0
10
time (ms)
Voltage (V)
Phase current ......
... MERS(PWM)
with MERS(Phase shifting)
without MERS
Single-phase induction motor
8
Low cost.
Bad power factor.
It requires large power capacity
and causes an increase in cost.
Easy to use.
Single-phase induction ... Control
Circuit
I
1
V
0
V
1
V
mers
V
2
V
C
I
2
Single-phase induction motor
IGBTs of MERS are controlled
synchronusly with the AC system.
V is controlled to maintain V at 100 V.
Gate...
... points of series are connected to a
capacitor. Although it is the same composition as a single phase
full bridge, it is a new point that the usage differs.
II. C
IRCUIT
C
ONFIGURATION
A. Operation