RU-2861327-C1 - METHOD AND DEVICE FOR CONTROLLING ELECTRIC TRANSMISSION OF SELF-CONTAINED VEHICLE IN ELECTRIC BRAKE MODE

RU2861327C1RU 2861327 C1RU2861327 C1RU 2861327C1RU-2861327-C1

Abstract

FIELD: vehicles. SUBSTANCE: group of inventions relates to electric traction systems of vehicles. A method for controlling the electric transmission of a self-contained vehicle in electric brake mode consists of setting the rotation speed of the internal combustion engine, exciting a direct current traction generator, loading the armature winding of the direct current traction generator through a second excitation regulator onto the field windings of the traction motors, loading the armature winding of the first traction motor onto two series-connected, first and second, braking resistors, loading the armature winding of the second traction motor onto a third braking resistor. Wherein, the connection point of the first and second braking resistors is connected via an isolation diode to the input of the second excitation regulator and to the armature winding of the direct current traction generator. A device for controlling the electric transmission of a self-contained vehicle in electric brake mode is also claimed. EFFECT: increasing the energy efficiency of a self-contained vehicle. 2 cl, 1 dwg

Inventors

Tanaev Valerii Faritovich
Kim Sergei Irlenovich
KIM SVETLANA VLADIMIROVNA
Grachev Vladimir Vasilevich
Kurilkin Dmitrii Nikolaevich

Dates

Publication Date: 20260504
Application Date: 20251219

Claims (2)

1. A method for regulating the electric transmission of an autonomous vehicle in electric brake mode, which consists in setting the rotational speed of a thermal engine mechanically connected to a DC traction generator and an exciter, by means of which the DC traction generator is excited through a first excitation regulator, loading the armature winding of the DC traction generator through a second excitation regulator onto the series-connected excitation windings of the first and second traction electric motors, the armature winding of the first traction electric motor is loaded onto two series-connected, first and second, braking resistors, characterized in that the connection point of the first and second braking resistors is connected through a separating diode to the input of the second excitation regulator and to the armature winding of the DC traction generator, the armature winding of the second traction electric motor is loaded onto a third braking resistor, when braking current appears in the armature winding of the first traction electric motor, excitation of the traction electric motors and power supply to the traction generator direct current, operating in the mode of a direct current motor with independent excitation, is carried out due to the voltage drop on the second braking resistor, and the rotation speed of the traction generator and the thermal engine is not allowed to exceed a pre-set value by changing the excitation current of the direct current traction generator by the exciter.
2. A device for regulating the electric transmission of an autonomous vehicle in electric brake mode, including a heat engine with a speed controller mechanically connected to a speed sensor, an exciter and a DC traction generator, first and second excitation controllers, a control unit, the input of which is connected to the output of the speed sensor, and the outputs are connected respectively to the input of the speed controller and the inputs of the first and second excitation controllers, wherein the excitation winding of the DC traction generator is connected to the armature winding of the exciter, the excitation winding of which is connected to the outputs of the first excitation controller, the armature winding of the DC traction generator is connected by its positive terminal through the second excitation controller to the series-connected excitation windings of the traction electric motors, the armature winding of the first traction electric motor is connected by its positive terminal to the series-connected first and second braking resistors, the armature winding of the second traction electric motor is connected by its positive and negative terminals to the third brake resistor, wherein the negative terminal of the armature winding of the second traction electric motor is connected to the negative terminals of the armature winding of the traction DC generator, the armature winding of the first traction electric motor and the excitation winding of the first traction electric motor, characterized in that the connection point of the first and second braking resistors is connected to the anode of the diode, the cathode of which is connected to the common connection point of the second excitation regulator and the positive terminal of the armature winding of the DC generator.

Description

The invention relates to devices and methods for braking by transferring part of the braking power to the primary engine of a vehicle, which drives an electric generator. A device for regulating electric power transmission in diesel locomotive electric braking mode is known. It comprises a heat engine with a speed controller, mechanically coupled to a traction generator whose output is connected to series-connected excitation windings of DC traction motors, the armature windings of which are connected to braking resistors. Armature current and excitation current sensors for the DC traction motors are installed in the armature and excitation winding circuits. Rotational speed sensors for the DC traction motor armatures are connected to the axes of the DC traction motor armatures. A controller generates preset braking force values and maximum permissible values for the armature current, excitation current, and commutation factor limitation. The power transmission regulation device also includes a control device which, taking into account the limitations received from the setter, generates a control signal for the traction generator excitation current regulator based on the results of the analysis of signals received from the sensors of the rotation speed of the DC traction motor armatures, the current of the traction motor armatures, the excitation current of the DC traction motors, a multiplier device and a signal from the output of a differentiating device, the input of which is connected to the output of the current sensors of the DC traction motor armatures ("Power Transmission of Diesel Locomotives on AC-DC" - Moscow, Transport, 1978, pp. 126-128; V.A. Koshevoy, V.I. Lipovka, V.A. Ivanov, V.M. Sharlai "Increasing the Stability of the Rheostatic Brake Regulation System of an Autonomous Transport Vehicle" - VNIIZhT Bulletin, 1978, No. 5, pp. 18-21). A drawback of the known device is that during braking, all the kinetic energy of the braking train is converted into thermal energy and cannot be used to compensate for losses in the electric transmission and heat engine, or to drive the locomotive's auxiliary loads, including cooling the braking traction motors. This compensation and drive of auxiliary loads during electric braking is accomplished by operating the heat engine shaft, which results in additional fuel consumption and reduces the locomotive's energy efficiency. A method for regulating the electric transmission of a vehicle in the electric brake mode is known, adopted as a prototype, which consists in the fact that at the initial moment of braking, the exciter, which supplies the series-connected excitation windings of the traction electric motors, is connected to the vehicle's battery, and then connected to part of the braking resistor (Karasev I.I., Ratomskiy L.P. To the driver about the ChS7 electric locomotive. - M. Transport, 1994. pp. 52-56). The disadvantage of the known method is that during braking, all the kinetic energy of the braked train is converted into thermal energy, dissipated in the braking resistors and cannot be used to compensate for losses in the electrical transmission, as well as to drive auxiliary loads of the vehicle, which reduces the energy efficiency of the vehicle. The technical result of the invention is to increase the energy efficiency of an autonomous vehicle by eliminating fuel consumption by a thermal engine in electric braking mode. The said technical result is achieved in that in the method for regulating the electric transmission of an autonomous vehicle in the electric brake mode, which consists in setting the rotation frequency of a thermal engine mechanically connected to a DC traction generator and an exciter, by means of which the DC traction generator is excited through the first excitation regulator, loading the armature winding of the DC traction generator through the second excitation regulator onto the series-connected excitation windings of the first and second traction electric motors, the armature winding of the first traction electric motor is loaded onto two series-connected first and second braking resistors, the connection point of the first two braking resistors is connected through a separating diode to the input of the second excitation regulator and to the armature winding of the DC traction generator, the armature winding of the second traction electric motor is loaded onto the third braking resistor, when braking current appears in the armature winding of the first traction electric motor, excitation of the traction electric motors and power supply of the traction a DC generator operating in the DC motor mode with independent excitation is carried out by means of a voltage drop on the second braking resistor, and the rotation speed of the traction generator and the thermal engine is not allowed to exceed a pre-set value by changing the excitation current of the DC traction generator with the exciter. Said technical result is also achiev