JPS6146101A - Controller for electric railcar - Google Patents

Abstract

PURPOSE:To rapidly readhere by inputting a brake force fed back to a brake controller in response to the slipping degree when an electric railcar slips. CONSTITUTION:A comparator 3 compares the output of an electric brake force detector 1 with a general brake force set value 2 instructed by a driver at regeneratively braking time, and inputs the difference to a supplementary brake force instructing unit 4 to control a supplementary brake so that the sum of the electric brake force and the supplementary brake force becomes necessary total brake force. Since the output of a ship detector 6 is added to the output of the detector 1 at the slipping time and fed back to the comparator 3, the supplementary force is not added. Thus, the readhering property can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a control device for an electric vehicle having an electric brake and a supplementary brake by a mechanical brake.

[Technical background of the invention and its problems]

Electric brakes on electric cars are used to obtain braking force by switching the two main motor circuits and using the piezoelectric motor for driving as a generator to convert the kinetic energy of the electric car into electrical energy. There is.

Electric vehicles with general (two electric brakes and supplementary brakes (air brakes, hydraulic brakes, etc.), special (two regenerative brakes)
In an electric vehicle equipped with a brake, the brake force fluctuates as much as the regenerative load fluctuates. Therefore, as shown in FIG. The supplementary player is controlled so that the sum of the electric braking force and the supplementary braking force is the required total braking force (:) as shown in Figure 5C.

During braking, when the wheel reaches a point where the adhesion coefficient between the wheel and the rail surface becomes small due to dirt, water, etc. on the rail surface, the wheel enters a skid state (:), and the distance between the wheel and the rail surface is reduced. Since the friction becomes kinetic friction, (braking force)〉
(Adhesion coefficient x vehicle weight). This state C
At 2, the rotation of the wheel i stops, and the electric car becomes ray, /I/r
To skate on kI (secondary).

In this case, since the wheels have stopped rotating, the main motor also does not rotate, and the electric braking force becomes zero.

When the electric brake force reaches O, the wheels re-adhere to the rail surface (2) and the electric brake tries to stand up, but if the electric brake force suddenly decreases (2), the regenerative load fluctuation shown in Figure 2 will occur. As in the case of (2), supplementary brakes are added as shown in Figure 3, and the sliding is increased (2).

[Purpose of the invention]

An object of the invention is to provide a control device for an electric vehicle that weakens supplementary braking force when the electric vehicle skids.

[Summary of the invention]

The present invention can supplement the output of the skid detector (2) and the brake controller (2) by inputting the brake force to be fed back in response to the degree of skidding (2) when the electric vehicle is skidding (2) and the degree of skid (2). This is a control device for electric vehicles that weakens the brakes to quickly re-adhesion.

[Embodiments of the invention]

The present invention will be explained based on an embodiment shown in the drawings.

The main circuit of the chopper electric car is as shown in Fig. 1 (two pantographs 10, a breaker for opening and closing the main circuit 11, a main motor armature hill 13, a piezoelectric motor field 14, 15, a slip detector 16, a slip detector). Resistors 17 and 18 for regeneration, diode 19 for regeneration, breaker for opening and closing the main circuit, chopper device 4, etc.

The skid detector 16 includes armatures 12, 13 and resistors 17 and 18.
The intermediate point of the bridge circuit consisting of the (
Two currents flow.

The brake control block diagram in Figure 2 is shown in Figure 2 along with the main circuit of the chopper electric car.

Figure 1 (2) 1 is the electric brake force detector, 2 is the total brake force setting value commanded by the driver, and 3 is the output of the electric brake force 1 and the total brake force setting device 2 compared and the difference between them. 4 is a supplementary brake command device that commands the amount of supplementary brake based on the output of comparator 3; 5 is the output of the supplementary brake command device (supplementary brake application device that applies the supplementary brake for abrasion; 8 is a magnetic Field chopper device 211: A phase command device that outputs a phase command; The output of the drowsiness brake force detector 1 is an adder that adds the two and feeds it back to the comparator 3.

By configuring the C2 control block as described above, when the vehicle is not skidding, the output of the skid detector 16 is O, so the conventional supplementary brake control 9 is carried out, and when the vehicle is skiing, the magnetic brake force detector 16 is used as shown in Figure 2. Since the output of 1 (2 outputs of the skid detector 16 are added together and the output of the comparator 3 (2) is fed back, no supplementary brake is applied, and the i-air braking force is lower than that of the skid 2 (brake force) < (adhesion coefficient x When the weight of the vehicle reaches (vehicle weight), the wheels re-adhere to the rail surface (-), thereby improving re-adhesion.

Although the Shinko Maya chopper vehicle has been described above as an example, the present invention is of course applicable to electric vehicles other than armature chopper vehicles, such as field chopper vehicles, as long as they perform supplementary brake control. .

Furthermore, the sliding detection is also applied to the present invention (2) when detecting the differential current of a group of piezoelectric motors shown in FIG. 3 (2), for example.

〔Effect of the invention〕

According to the present invention, when an electric vehicle is skidding, the output of the electric brake force detector (the output of the two skid detectors) is added together and compared with the total brake force set value, so no supplementary braking force is added, so that re-adhesion is reduced. You can improve your performance.

[Brief Description of the Drawings] Fig. 1 is a main circuit control block diagram of an armature chopper vehicle based on the present invention, Fig. WI2 is a state diagram of brake control according to Fig. 1 (; Fig. 3 is a block diagram showing skid detection) Figure 4 is a block diagram showing conventional brake control for an electric vehicle with regenerative braking, Figure 5 is a state diagram of brake control during regenerative load fluctuations, and Figure 6 is a conventional brake control (when sliding in It is a state diagram of 1... Electric brake force detector, 2... Total brake force setting value, 3... Comparator, 4... Supplementary brake command device, 5... Supplementary brake application device. , 7...
・Comparator, 8...Phase command! f-5! , 9...
Adder, 10... Pantograph, 11... Main circuit closing/opening breaker, 12.13... Main motor armature, 14.15... Main motor field, 16...
Slippage detector, 17.18...Resistor, 19...Diode, Addition...Main circuit closing/opening breaker, 2
1... Chopper device, 4, 23... Current detector,
Ah... skid detector (7317) agent: patent attorney Noriyuki Chika (and 1 others)
Figure iI Figure 2 Figure 3

Claims (1)

[Claims] an electric brake force detector for detecting electric brake force; a brake control means for determining the sum of the electric brake force output from the electric brake force detector and a supplementary brake force as a required total brake force setting value; A control device for an electric vehicle, comprising: a skid detector for detecting skidding; and means for increasing the amount of feedback of the brake force input to the brake control means at the time of skidding based on the output of the skid detector, and weakening the supplementary braking force.