Electromagnetic starter and detection method thereof

Abstract

The invention discloses an electromagnetic starter and a detection method of the electromagnetic starter. The electromagnetic starter comprises a singlechip, an alternating current contactor, a leakage detection circuit, a current detection circuit and a power-switching circuit, wherein an output voltage signal of the power-switching circuit connected with an air switch is fed into the singlechip, the leakage detection circuit, the current detection circuit and the input end of a relay control circuit respectively; the other path of output current signal of the air switch is output through the leakage detection circuit, the alternating current contactor and the current detection circuit, and is used for connecting the a binding post to a leakage experimental switch; detection current signals output by the leakage detection circuit and the current detection circuit are respectively fed to an STC singlechip for processing; and digital signals output by the singlechip are connected with the internet through an RS485 communication circuit, and can be used for setting functions of the starter through the internet. According to the detection method, with the adoption of the detection circuit and the software program, detection treatment on overload/underload current, leaking current, low voltage, overvoltage and the like of a motor is realized, and protection on the motor is realized.

Description

technical field [0001] The invention belongs to the field of motor driving, and in particular relates to an intelligent electromagnetic starter used for motor driving and a detection method thereof. Background technique [0002] With the rapid development of computer technology, intelligent motor starters are also widely used in various starting protection systems. It can not only complete the calculation and logic judgment functions required by relay protection, but also for each protected As far as the object is concerned, the intelligent type provides more advanced means for theoretical research and application research with its convenience, flexibility, reliability, energy saving and many other unique advantages. Compared with traditional electromagnetic starting devices, its versatility, man-machine dialogue function Strong, can realize various very complex algorithms and various protection principles. Therefore, the intelligent motor starter will be the direction of f...

AI Technical Summary

Problems solved by technology

[0004] At present, electromagnetic starters generally do not have leakage protection, and there are shortcomings such as large errors in overload protection, inability to set functions according to on-site usage, and lack of networked control.

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