Dynaset HG 1, Руководство пользователя, Страница: 24 / 72

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HYDRAULIC GENERATORS
OPERATING PRINCIPLE
Compound regulator is connected to the auxiliary windings. The regulator
maintains the output voltage constant through the entire load range with accuracy
of ± 5%. Compound regulator sets the excitation current according to electric load
of each phase individually with its separate current windings.
Electronic voltage regulator is connected to the stators windings and achieves an
accuracy of ± 3%. Electronic voltage regulator constantly compares output voltage
to the pre-adjusted reference value and sets the excitation current according to
the load.
The response time of the voltage control is less than 1 second.
3.3. PERFORMANCE OF AUTOMATIC FREQUENCY CONTROL
RPM-cartridge maintains rotation speed of the hydraulic motor so that the
frequency is constant (±5 % ). The output power remains stable (±5 %) even when
the hydraulic flow (Q) exceeds the nominal flow (Qnom) up to 20-30% l/min,
depending on HG hydraulic generator size.
3.4. PRESSURE POWER RATIO
Picture 12: Automatic frequency control
Following chart in picture 13 describes the power to pressure ratio. The chart
shows output powers relation to the pressure, when the hydraulic flow Q is kept
constant. The best power to pressure ratio is achieved when the pressure is at
nominal level, little under the maximum value. READ CHAPTER „10. TECHNICAL
SPECIFICATIONS“.