Solid-state starting and speed regulation device with closed loop control function for wound-rotor motor

Abstract

The invention relates to a solid-state starting and speed regulation device with a closed loop control function for a wound-rotor motor. The solid-state starting and speed regulation device comprises a PLC (programmable logic controller), an upper computer, a touch display screen, and an adjusting module connected with the PLC and used for receiving a control command to adjust a dragged load; the adjusting module comprises a chopper and a rectifier bridge circuit; the chopper is connected with the input end of the rectifier circuit through a resistor, and the output end of the rectifier bridge circuit is connected with the dragged load; the PLC comprises a first communication interface, a second communication interface, an analog quantity input module, a central processing unit, and an analog quantity output module. The solid-state starting and speed regulation device provided by the invention overcomes the defects that since a conventional speed regulation device of a load fan or a water pump carried by the wound-rotor motor is controlled manually, process requirements of mining cannot be met, and the real-time property in speed regulation is insufficient, the purpose of closed loop control over the flow rate and pressure of a dragged object, namely the fan or the water pump is achieved by automatically regulating the rotational speed of the controlled motor is achieved, and the effects of high efficiency and energy conservation are further achieved.

Description

technical field [0001] The invention relates to a speed regulating device applied to a load fan water pump carried by a winding motor, in particular to a solid-state start speed regulating device for realizing a closed-loop control function when winding a winding motor. Background technique [0002] At present, the Chinese invention patent specification CN2543279 provides a "liquid soft start debugging device", which is applied to the speed regulating equipment of the fan and water pump with the load of the winding motor. Its control mode adopts manual control mode and adopts circulating water cooling mode. , can not meet the process requirements of industrial and mining and the real-time speed regulation, reducing the energy saving effect. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a solid-state start-up speed regulating device for a wound motor with a closed-loop con...

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Problems solved by technology

[0002] At present, the Chinese invention patent specification CN2543279 provides a "liquid soft start debugging device", which is applied to the speed regulating equipment of the fan and water pump with the load of the winding motor. Its control mode adopts manual control mode and adopts circulating water cooling mode. , can not meet the process requirements of industrial and mining and the real-time speed regulation, reducing the energy saving effect

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