Kikusui PCZ1000A, Руководство по эксплуатации

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PCZ1000A
2-11
2
Unpacking and Installation
Input Voltage Waveforms
The PCZ1000A controls the amplitude of the sinusoidal current by detecting the
RMS value of the input voltage waveform.
In the following cases, distortion may appear on the current waveform and the load
current operation may become unstable.
If the input voltage changes suddenly, the current value will momentarily become
unstable (response time: approximately 1 s).
If the frequency of the input voltage changes suddenly, the power waveform will be
distorted for a few cycles. (See Fig. 2-8. The smaller the change in frequency, the
less distortion is generated.)
Input of DC voltage or voltage out of the rated frequency range results in abnormal
operation. (If the input voltage is exceeding the rated frequency range, the
PCZ1000A will maintain the waveform until complete synchronization <1> in
Fig.2-7. If the input voltage is less than the rated frequency range, it will maintain
the waveform until complete synchronization <2> in Fig.2-7. In the case of a DC
voltage, no current flows.)
Fig.2-7 Current Distortion for a Sinusoidal Input Voltage
Even if the voltage waveform is a square wave as in <1> in Fig.2-8, a sinusoidal
current will flow independently of the input voltage waveform. However, distortion
may appear on the current waveform and the load current operation may become
unstable in the period when the input voltage in <2> in Fig.2-8 is at 0 V. Please do
not input voltages that include 0 V to the PCZ1000A.
Voltage waveform
Current
waveform
In the case of a high input frequency
Voltage waveform
Current
waveform
In the case of a low input frequency
(No current flows)
(Cut in mid-course)
t1
t1 Synchronizes
momentarily
t2
Completely synchronizes with the voltage
waveform within a few cycles
Synchronizes
momentarily
t2
Completely synchronizes with the voltage
waveform within a few cycles
t1
t1
<1>
<2>