Linear driving device and controlling and using method of linear driving device for solar tracker

Abstract

The invention discloses a linear driving device and a controlling and using method of the linear driving device for a solar tracker. The linear driving device comprises an outer tube and a sealing end cover arranged at the end portion of the outer tube. A screw is arranged in the outer tube, one end of the screw is connected with a drive mechanism, a transmission nut in threaded match with the screw is arranged on the screw, and a telescopic rod is arranged between the outer tube and the screw. One end of the telescopic rod is connected with the transmission nut, the other end of the telescopic rod penetrates through the sealing end cover, a sealing assembly is arranged between the telescopic rod and the sealing end cover, and a waterproof oil-proof vent plug is arranged on the outer tube. The linear driving device is mainly used on the solar tracker, corresponding structural design is performed on the aspects of deflection, load resistance and protection of the device according to the using environment of the solar tracker, and the linear driving device applied in the solar tracker is reliable and stable in operation and strong in deflection and load resistance and accordingly improves the tracking accuracy of the solar tracker effectively.

Description

technical field [0001] The invention belongs to the technical field of solar tracking, and in particular relates to a linear drive device for a solar tracker and a control and use method thereof. Background technique [0002] like figure 1 As shown, it is the specific application of the existing linear drive device 15 in the solar tracker, which is mainly used for the tracking drive of the solar dual-axis tracker in altitude angle (it can also be used in the azimuth angle) and the drive of the single-axis tracker. The existing linear drive device mainly has the following problems: [0003] 1. When designing the solar tracker (two-axis and single-axis), the center of gravity of the moving parts is designed to coincide (close) with the rotation axis, so as to reduce the driving torque required for tracking and meet the low energy consumption requirements of the tracker itself. In practical engineering applications, due to the special structural limitations of the tracker, th...

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Problems solved by technology

[0008] The existing transmission between the motor and the screw rod of this type of drive adopts an ordinary gear transmission, and the interface between the integrated signal feedback system of the transmission and the screw rod is not sealed. During actual use, the rainwater infiltrated through the telescopic rod can directly reach the inside of the transmission, making The gears are corroded, the signal feedback system is short-circuited; in the low temperature environment, there will be icing, so that the driver cannot work

In addition, the existing drive signal feedback system is integrated and associated with the transmission design, which increases the difficulty of maintenance and replacement

[0009] 4. Existing drivers of this type use motor current monitoring to achieve protection, which requires complex external circuits and requires the system hardware to include an A / D conversion module, which takes up a lot of system resources

The traditional method of monitoring the motor current is mainly to affect the voltage change on the sampling resistor after the current change of the external sampling resistor. The control system realizes the monitoring of the motor current by judging the voltage of the sampling resistor. This method also has large errors and untimely response. shortcoming

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