ПОЛІПШЕННЯ ХАРАКТЕРИСТИК ПЕРЕТВОРЮВАЧА ЕЛЕКТРОПРИВОДА В ПЕРЕХІДНИХ РЕЖИМАХ
DOI:
https://doi.org/10.31734/agroengineering2019.23.061Keywords:
bridge converter, electric drive, DC motor control, transient modeAbstract
Solving energy saving problems and ensuring safe modes of operation of the DC motor by controlling the optimum mode in a pulsed electric drive.
At present, in the industry, and especially in electric transport, electric motors with direct electric motors are used. The range of application of direct current motors with series excitation motors (DPZ) is rather wide traction electric drive of rolling stock of urban and railway transport. This is due to the fact that the change in the load moment for these mechanisms is in good agreement with the electromechanical characteristics of the DPZ.
A significant factor in increasing the profitability of electric transport in general may be the replacement of an existing traction drive with more modern types.
Simulation models have been developed that allow us to investigate electromechanical processes in a serial DC motor.
Introduction to the circuit of a pulsed regulator diode, which shunts the excitation winding, reduces the rate of attenuation of the current in this winding.
The proposed modernization, which consists in the introduction of diodes in the scheme, allows to use the mode of electrodynamic braking during self-excitation of the electric motor.
The proposed circuit design with the use of energy storage avoids the use of additional independent current sources and simplifies the technical implementation and reduces costs.
The introduction of additional diodes, energy storage, auxiliary and ballast resistors allow to limit the starting current and provide safe operating modes of the elements of the actuator. Also, the voltage on the converter elements is controlled by the additional input of the control unit and does not exceed the maximum permissible values, which ensures safe operation of all network elements.
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