The difficulties of photovoltaic system structure

As the core of the system power supply part, the research and analysis of the characteristics of photovoltaic cells can help to propose a strategy for photovoltaic cell management. Based on the basics of power electronics and physics, the ideal photovoltaic panel model can be simplified as an ideal diode and a current source connected in parallel.

However, in practical engineering applications, due to the power loss of the photovoltaic cell’s own materials, connecting metal wires and contact point components, when building a mathematical model, series resistors and shunt resistors are usually used to represent these losses, which can be obtained when the load is For a pure resistor.c purlin manufacturer

In the system structure and the asynchronous motor rotor winding in the magnetic field movement process detailed analysis and research, but how can the motor be fast and efficient operation to meet the user’s actual requirements, the difficulties are divided into the following aspects:

1.the choice of asynchronous motor control mode, the current control of asynchronous motor: vector control, direct torque control, adaptive control and speed sensorless high dynamic performance control and other major control methods, each control method has its own The pros and cons. Choosing the control method of the asynchronous motor with this paper can not only make the Guangyi pipeline pump run efficiently, but also improve the utilization rate of the photovoltaic system and prolong the service life of the motor.

2.push-pull, inverter circuit topology selection, circuit design and component selection is not reasonable, not only makes the DC-DC boost process slower or does not reach the given boost value, and the asynchronous motor power supply is unstable It will lead to frequent start of the motor; intelligent selection of power supply and selection of charging strategy.

3.The motor starts control. If the torque is insufficient during starting, the electromagnetic torque generated by the stator winding is not enough to make the motor run, which will seriously affect the starting time of the motor and increase the probability of motor failure. If the torque is too large during the starting process, the rotor will be caused. The component is overheated, causing mechanical failure.

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