Samlex Europe PST-300S-12E, Руководство пользователя

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2.2 OUTPUT VOLTAGE WAVEFORMS
TIME
360
320
280
240
200
160
120
80
40
0
40
80
120
160
200
240
280
320
360
Wave sits at
ZERO for some
time and then
rises or falls
Sine Wave
Pure Sine Wave
crosses Zero Volt
instantaneously
The output waveform of the Samlex PST series inverters is a Pure Sine Wave like the
waveform of Utility / Grid Power. Please see Sine Wave represented in the Fig. 2.1 that
In a Sine Wave, the voltage rises and falls smoothly with a smoothly changing phase
Wave, the voltage rises and falls abruptly, the phase angle also changes abruptly and
it sits at zero V for some time before changing its polarity. Thus, any device that uses a
control circuitry that senses the phase (for voltage / speed control) or instantaneous zero
voltage crossing (for timing control) will not work properly from a voltage that has a
Sine Waves of odd harmonics (multiples) of the fundamental frequency of the
Sine Wave. For example, a 50 Hz Sine Wave will consist of Sine Waves with
odd harmonic frequencies of 3rd (150 Hz), 5th (250 Hz), 7th (350 Hz) and so on. The high
-
ence, higher heating effect in inductive loads like microwaves and motor driven devices
like hand tools, refrigeration / air-conditioning compressors, pumps etc. The higher
frequency harmonics also produce overloading effect in low frequency capacitors due to
lowering of their capacitive reactance by the higher harmonic frequencies. These capaci-
Factor improvement and in
single-phase induction motors as Start and R
Wave inverters may shut down due to overload when powering these devices.
SECTION 2 | General Information
Fig. 2.1: Pure and Modified Sine Waveforms for 230 VAC, 50 Hz
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