Energy-saving control system used for photovoltaic electric generator

Abstract

The invention provides an energy-saving control system, used for a photovoltaic electric generator, capable of reducing energy consumption of a die-casting machine. The energy-saving control system comprises an electricity-saving control cabinet capable of collecting pressure and flow of the die-casting machine. The electricity-saving control cabinet is connected with a motor. The motor drives an oil pump. A pressure sensor is arranged at an oil outlet of the oil pump and connected with the electricity-saving control cabinet. According to the energy-saving control system used for the photovoltaic electric generator, the pressure and flow of a system is detected and fed back constantly, the rotational speed and torque of the synchronous motor are changed in time through an energy-saving controller, corresponding adjustment is made on the pressure and flow, finally, the pressure of the system is kept fast, accurate and stable, and set pressure and flow are reached. The overflow quantity of the die-casting machine is controlled to be minimum, so that the production needs of the die-casting machine is met, the energy-saving purpose is achieved, and the effect that how much is needed, how much is supplied is achieved.

Description

technical field [0001] The invention relates to a die-casting machine equipment, in particular to an energy-saving control system for a photovoltaic generator. Background technique [0002] In the die-casting production industry, the working process of the die-casting machine includes mold clamping, high-pressure mold clamping, first-speed injection, second-speed injection, pressure holding, cooling, mold opening, and material cleaning. The oil pump pressure and flow required for each stage are different. , that is, the matching of pressure and flow in each stage is different, and the power of the oil pump motor is equipped according to the maximum load during its operation. However, in a production cycle of the die casting machine, only the high-pressure mold clamping and injection stages have a larger load , the hydraulic load demand in other working stages is small, and the load in the special cooling process is almost zero; for the oil pump hydraulic system, if the oil p...

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Problems solved by technology

[0002] In the die-casting production industry, the working process of the die-casting machine includes mold clamping, high-pressure mold clamping, first-speed injection, second-speed injection, pressure holding, cooling, mold opening, and material cleaning. The oil pump pressure and flow required for each stage are different. , that is, the matching of pressure and flow in each stage is different, and the power of the oil pump motor is equipped according to the maximum load during its operation. However, in a production cycle of the die casting machine, only the high-pressure mold clamping and injection stages have a larger load , the hydraulic load demand in other working stages is small, and the load in the special cooling process is almost zero; for the oil pump hydraulic system, if the oil pump is still running at full load, the oil supply is constant, and the excess hydraulic oil It flows back to the fuel tank through the overflow valve, doing useless work and wasting electric energy in vain

During the whole working process of the die-casting machine, the power loss of the oil pump motor is serious, and the power utilization rate is only 30% to 50%.

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