Electric vehicle braking follow-type fuzzy prediction starting and stopping control circuit

Abstract

The invention relates to the technical field of electric vehicle starting and stopping, in particular to an electric vehicle braking follow-type fuzzy prediction starting and stopping control circuit. The electric vehicle braking follow-type fuzzy prediction starting and stopping control circuit comprises a direct current contactor QF, a precharge branch YC, alternating current contactors QF3, a recognition unit B, a fuzzy prediction control unit VC, a drive and executing device YE, electric reactors L and a capacitor V. The recognition unit B and the fuzzy prediction control unit VC are connected with an electric tractor power supply through the direct current contactor QF1 and the precharge branch YC, the rear end of the recognition unit B and the rear end of the fuzzy prediction control unit VC are connected with the drive and executing device YE, the rear end of the drive and executing device YE is connected with the electric reactors L and capacitors C, the rear ends of the electric reactors L and the rear ends of the capacitors C are connected with the alternating current contactors QF3, and the alternating current contactors QF3 are connected to an electric grid. According to the electric vehicle braking follow-type fuzzy prediction starting and stopping control circuit, the main circuit topology is simple, control is flexible and convenient, and the quality of output waveforms is good.

Description

technical field [0001] The invention relates to the technical field of starting and stopping electric cars, in particular to a brake-following type fuzzy prediction control starting and stopping circuit of electric cars. Background technique [0002] Electric traction vehicles are characterized by the ability of their traction motors to have regenerative electric braking. When the traction motor adopts electric braking, the synchronous speed of the traction motor decreases, but the rotor has an inertial effect when the train is running, so that the rotor speed is higher than the synchronous speed, resulting in braking torque, and the motor becomes a generator at this time. , thus generating renewable electric energy. The existence of this electric energy will cause the braking failure or unstable braking of the electric vehicle, which will affect the safety of the train and the comfort of the passengers, and even affect the safety of the passengers. It must be eliminated or...

AI Technical Summary

Problems solved by technology

The existence of this electric energy will cause the braking failure or unstable braking of the electric vehicle, which will affect the safety of the train and the comfort of the passengers, and even affect the safety of the passengers. It must be eliminated or diverted in some way to ensure the safety of the train.

[0003] Most of the existing methods use energy-consuming devices to completely eliminate them or use energy storage devices to eliminate them for a short time, but their disadvantages are obvious, such as generating a large amount of heat energy and causing thermal radiation effects in the environment, or slow response and unable to act in real time, resulting in unstable start and stop of electric vehicles

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