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Common description
Basic industries of variable-frequency electric drive are:
1. Pump assembly drive.
2. Fan installation drive.
3. Main hoist drive.
4. Moving drive.
5. Hardware and software control system of the compressor station.
6. Hardware and software control system of the indoor temperature.
7. Hardware and software control system of the crane drives.
State-of-the-art of the power electronics, microprocessor control systems, theory and methods of the automatic regulation allows to use extensively those theoretic and technique achievements for solving the problems of efficient use of energy and resources. The use of the current methods of the technologic mechanisms speed regulation with the manifold possibilities of the automatization provides the optimal utilization of the energetic and other natural resources. The modern frequency inverters allow the quality of the speed regulation of the induction motors. Mass use of the frequency electric drive solves the technologic problems as well as the problem of the power saving.
High efficiency of the frequency regulated electric drive adaptation is shown on its use at pumping, ventilating and compression plants. Electric drives of the shown mechanic type are consuming almost 20-25% of all output energy and in general they are staying unregulated. This prohibits the getting of the rational energy, water, vapor, air consumption state if the technologic demands are changed. Capacity regulation by damper valves is actually uneconomical method. Marked decline of the load moment during descent of the driving motor rotary speed which is typical for the concerned mechanisms provides the substantial energy saving (up to 50%) if the regulated electric drive is used. It also develops the principally new technology of water, air, and other transportation with the effective capacity regulation of the assembly. Besides, the baseline pressure retention in the system results the substantial decrease of the unproductive expenditures of the transported product, decrease of the accidence and increase of the operational endurance of the hydraulic and pneumatic supplies. The experience of the frequency regulated electric drives in the water supply shows that we can economize up to 25 % of the water. Therefore the big economy of the operating costs. Low requirements to the quality of the pressure regulation specify the possibility of application of the cheap frequency inverter with the u/f control which is simple in designing, adjusting and exploitation. The positive point is also that the frequency inverter can be easily installed to the current assembly without any reconstruction of the system as a whole. The combination of the high efficiency of regulation and not too big equipment cost provides the relatively low term of its payback (several months).
Material-handling machines are the second field of the energy efficient drives implementation. The majority of the existent mechanisms of the given group (cranes, lifts) have the contactor combination while speed regulation by the switching of the resistor scales in rotor circuit of the induction motor or while the usage of the double-speed motors. Rheostatic control which is used for speed changing differs by the extremely low energy efficiency and has large losses. The remittance on the frequency regulation has the next privileges:
- the variable speed control when the energy consumption is lowering;
- the accuracy and control speed performance is rising;
- the startup and slowdown flowing, missing of the sharp pounding increase the durability of all mechanic elements of lift-and-carry units, raise the comfort of controlling and insure safety of the load;
- cage asynchronous motors are cheaper and securer than the motors with phase rotor and double-speed motors.
On the base of the modern soft hardware the certified professionals of LVEF "Lider Elektrik" will develop and implement the automatic regulation and control systems of the electric drives of any complexity.
The utilization of the frequency regulated electric drives and hardware and software systems under the LVEF "Lider Elektrik" production:
1. Control cabinet with the frequency drive:
- for traversing devices;
- for conveyor controlling;
- for crane mechanisms (lifting, moving);
- for compressor systems;
- for pumping systems;
- for fans and blowers;
- for materials- handling machines;
2. Hardware and software systems:
- blast furnaces controlling;
- rolling mills controlling;
- flying shears controlling;
- drainage systems controlling;
- forge-and –pressing devices controlling;
- ventilation and heating systems controlling.
LLC LVEF "Lider Elektrik" completes all complex of services from engineering design study to delivery, fettling, placing in service and subsequent after-sales service of the installed equipment.
External appearance
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