A plug-and-play AC contactor intelligent accessory system and its implementation method
An AC contactor, plug-and-play technology, applied in relays, electrical components, circuits, etc., can solve the problems of cumbersome and complicated processes, hindering the intelligent process of contactors, etc.
Active Publication Date: 2021-03-02
FUZHOU UNIV
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Problems solved by technology
However, due to the wide variety of AC contactor specifications, one-to-one design is usually used when designing intelligent controllers. It is necessary to match the parameters of the controller according to the parameters of the AC contactor body, and the controller parameters are usually adjusted by technicians through engineering debugging and other methods. , the process is cumbersome and complicated, which hinders the intelligent process of contactors
Method used
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0033] Such as figure 1 As shown, this embodiment provides a plug-and-play AC contactor intelligent accessory system, including an EMI filter, a coil drive circuit, a voltage acquisition unit, a current acquisition unit, a driver, a microcontroller, an expansion port and an auxiliary power supply ;
[0034] The system is electrically connected with the external AC or DC control power supply and the coil of the AC contactor; the AC or DC control power supply is electrically connected with the coil driving circuit after passing through the EMI filter; the coil driving circuit is connected with the AC contactor The coil is electrically connected to control the current of the AC contactor coil; the AC or DC control power supply is also electrically connected to the auxiliary power supply after passing through the EMI filter; the auxiliary power supply is r...
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The invention relates to a plug-and-play AC contactor intelligent accessory system and its realization method. The system includes an EMI filter part for suppressing high-frequency interference signals, a coil drive circuit part for controlling the coil current of the AC contactor, The current acquisition part that collects the current value of the coil, the voltage acquisition part that collects the filtered and rectified voltage of the control power supply, the driver part of the switch tube in the control coil drive circuit, the microcontroller part, the expansion port part and the auxiliary power supply part for function expansion . Among them, the micro-controller includes the coil parameter online detection part for detecting coil resistance and inductance, the controller parameter estimation part and the state controller part for controlling the process of AC contactor pull-in, hold and break; the accessory system through the online Detect coil parameters, estimate controller parameters, and automatically match different specifications of contactors. When used in different specifications of contactors, it has plug-and-play features, realizing its intelligent work and energy-saving and silent operation.
Description
technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a plug-and-play AC contactor intelligent accessory system and a realization method thereof. Background technique [0002] AC contactor is a product in the field of industrial control with many types, large output and wide application in low-voltage electrical appliances. Traditional AC contactors have the advantages of easy operation, simple structure, and mature technology, but there are still many shortcomings, such as large power consumption, high coil temperature, high vibration and noise, and it is difficult to adapt to the development of new energy, vehicle, and power systems. . Since the 21st century, due to the development and introduction of power electronics technology, low-voltage electrical appliances have begun to move towards intelligence. Intelligent low-voltage electrical appliances are intelligent, networked, and informatized low-volta...
Claims
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IPC IPC(8): H01H47/22H01H47/32
CPCH01H47/22H01H47/223H01H47/32
Inventor 许志红张长坤
Owner FUZHOU UNIV