Research On Mine Power Battery Doubly-Fed PWM Charger

With the rapid development of industrial automation,the latest achievements in equipment manufacturing have radiated all walks of life,and the coal industry is constantly updating and upgrading production equipment.As is known to all,China's coal miners frequently encounter disasters such as water damage and gas explosion during the mining process,resulting in a very harsh coal mine environment.In order to ensure the normal and safe operation of mining electric vehicles and underground auxiliary transportation equipment,it is necessary to carry out mining power batteries.Reasonable design makes it have the advantages of flameproof,reliable and stable,thus ensuring the efficient operation of the equipment in the coal mine and the safety of workers.In response to energy shortages and environmental pollution caused by a large number of fossil energy applications,many manufacturers have produced power batteries,which have been widely used in energy storage power stations and electric vehicles.Compared to other power batteries,the design standards for mining power batteries are more demanding.The existing mining power battery needs to be equipped with a large number of charging and discharging equipment,and several charging and discharging tests are performed to perform capacity estimation.When the mine power battery charging device is used in a high-power scenario,the internally used thyristor adopts a phase-controlled rectification method,which causes frequent problems such as large size and low reliability of the device;in addition,the discharge device usually needs to undergo a first-stage power conversion.Parallel high-power resistors,resulting in the consumption of electrical energy in the form of thermal energy,is inconsistent with the concept of energy conservation and environmental protection advocated by today's society.Therefore,by using a three-phase voltage-type PWM rectifier structure,and establishing a mathematical model,the control of its control.The space vector control algorithm is selected from practical considerations.The latter stage bidirectional full-bridge converter,with its corresponding working mode,uses the voltage and current double closed-loop PID control and phase shift control algorithm to design the mine power battery,which realizes the function of energy doubly-fed.For the research on the charging method of the power battery,an intelligent segmented charging method is proposed.The simulink software is used to simulate the mining power battery doubly-fed PWM charger system,which is to verify the rationality of the design.At the same time,the reliability of the corresponding control algorithm is verified.Combined with the advantages of small size,low power,no pollution and intelligence,the power battery is applied to mining electric vehicles,uninterruptible power supplies and backup energy storage equipment,which has the important significance of realizing light weight and energy feedback of charger devices.