Electric vehicle drive control apparatus

Abstract

Provided is an electric vehicle drive control apparatus, wherein fluctuation in the decelerating rate of the electric vehicle is made to be smaller, and the ride thereon is improved to become more comfortable, even when regeneration load is insufficient while regenerative braking is being activated. The electric vehicle drive control apparatus (1) is provided with an open / close unit (4) that opens or closes a connection with DC power; a power conversion unit (5), to which DC power is inputted to two input terminals thereof via the open / close unit, which converts DC power to AC power by a switching operation, and drives an AC rotating machine (13) connected to the output side thereof; and a voltage detection unit (15) that detects the voltage between the two terminals. The electric vehicle drive control apparatus (1) is also provided with a power control unit (14) that controls the power conversion unit such that the open / close unit is opened when the voltage detected by the voltage detection unit exceeds a prescribed opening voltage, and the regenerative braking force of the AC rotating machine is reduced with a prescribed reduction pattern having a ramp reduction period that is longer than 0.

Description

technical field [0001] The invention relates to a drive control device for propulsion control of an electric locomotive. Background technique [0002] Generally, an electric locomotive is configured to take in electric power from an overhead line by a power collector, and use the taken in electric power to drive an AC rotating machine by a drive control device using an inverter circuit or the like. . In addition, when braking a vehicle, so-called regenerative braking is used in which a braking force is obtained by regeneratively operating an AC motor. The regenerative electric power generated at this time is supplied to other powered vehicles existing near the own vehicle or the load of the own vehicle via the overhead line or the third rail, and then it is consumed. [0003] However, there may be cases where there are no other vehicles in the vicinity of the vehicle in the morning or evening or in an idle line area where the number of train lines is small. fully consumed...

AI Technical Summary

Problems solved by technology

However, since the mechanical brake uses air pressure to press the brake pads against the wheel, etc., and uses friction to obtain the braking force, it takes time for the mechanical brake to fully function.

Although in normal driving of an electric locomotive, when the regenerative brake is switched off (OFF) and transferred to the mechanical brake, by gradually reducing the regenerative braking force, the mechanical braking force gradually works during this period, it is possible to maintain the basic braking force of the electric locomotive However, as mentioned above, when the regenerative braking force is lost momentarily, the total braking force (Btotal) of the electric locomotive is insufficient during the period until the mechanical brake works, so the phenomenon that the deceleration drops sharply occurs

In such a case, there is a problem that the ride quality of the vehicle deteriorates and the braking distance increases due to fluctuations in deceleration.

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