JPH062404Y2 - Electric vehicle running control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention comprises a mixed bridge of a thyristor and a diode, and uses a phase control method to excite the field of two groups of DC motors for driving an electric vehicle. The present invention relates to an electric vehicle running control device including one field-to-field device and a transformer that supplies the field-to-field device with a three-phase AC voltage from a three-phase AC power supply device. Such an electric vehicle traveling control device is used to control the speed of the electric vehicle.

(Prior Art) It is known to phase-control the field of a DC motor that drives an electric vehicle using a mixing bridge. This phase control is
Traditionally, this is achieved by connecting the secondary winding of a transformer, the primary winding of which is connected to the AC power supply, to the mixing bridge. The connection of this secondary winding to the mixing bridge is such that the phase control is always in the positive or negative half-cycle of the same polarity of the power supply, in the other polarity half-cycle the supply voltage is rectified by the diodes of the mixing bridge. I am doing it.

(Problems to be solved by the invention) In this case, as is well known, the power supply waveform is distorted, and even harmonic components are generated. This problem does not become so serious if the load capacity is sufficiently smaller than the power supply capacity, but when using an auxiliary power supply such as a motor generator installed in an electric vehicle, the load capacity Since the power supply capacity is smaller than that of the other power supply, the influence of the waveform distortion due to the phase control becomes large, and other loads of the auxiliary power supply, for example, the flicker of a fluorescent lamp and the like are adversely affected.

The purpose of the present invention is to provide auxiliary control by having one field-pocket magnet perform phase control during the positive cycle of the auxiliary power supply and the other field-pocket magnet during the negative half cycle. The purpose is to suppress the generation of even harmonics by reducing the distortion of the power supply waveform.

(Means for Solving the Problems) According to the present invention, the primary winding of the transformer connected to the three-phase AC power supply device has a triangular connection, and the secondary winding of the transformer has two windings.
These two secondary winding portions are provided as a set, and are connected to the above-mentioned two field-magnetism-magnet devices as three-phase outputs, which are star-connected with opposite polarities.

(Operation) In the present invention, the two field toe devices alternately operate every half cycle of the power supply device to phase-control the field. As a result, the waveform distortion of the auxiliary power supply device is small and the occurrence of even harmonics is suppressed.

Embodiments The present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram showing an example of an electric vehicle traveling control device according to the present invention. In FIG. 1, reference numeral 1 denotes a current collector of an electric vehicle, which has a function of extracting an electric current from an overhead line, for example. This current collector 1 is connected via a main circuit breaker 2 to an armature group 3a consisting of an armature group of one DC motor or a plurality of DC motors connected in series. This armature group 3a
Is a field group consisting of one or a plurality of series-connected fields
The variable resistor 7a is connected to one end of the variable resistor 7a through a series circuit including a parallel circuit of the field magnet device 5a and the bypass diode 6a. This series circuit is shunted by the series circuit of the inductive shunt 8a and the contactor 9a. The other end of the variable resistor 7a is connected to one end of a variable resistor 7b via a contactor 10, and the other end of the variable resistor 7b has the constituent elements 3a, 4a, 5a, 6a, 8a and 9a. Armature group 3b, field group 4b, field toe device having the same configuration as
5b, bypass diode 6b, inductive shunt 8b and contactor
It is grounded through a circuit consisting of 9b.

Furthermore, the connection point between the main circuit breaker 2 and the armature group 3a is connected to the connection point between the contactor 10 and the variable resistor 7b via the contactor 11, and the variable resistor 7a and the contactor are connected. The connection point between 10 and 10 is grounded via a contactor 12.

According to the present invention, a transformer 13 which is connected to a three-phase AC auxiliary power supply device (not shown) and has a special connection configuration according to the present invention.
Is used to control the current flowing through the field toe magnet devices 5a and 5b.

Each of the field toe magnet devices 5a and 5b is usually constituted by a mixed bridge of a thyristor S and a diode D, as shown in FIG. That is, each bridge is composed of three serial circuits of thyristors S and diodes D connected in parallel. In the transformer 13 according to the present invention, the primary winding I is connected to a three-phase AC power supply device by forming a triangular (delta) connection, the secondary winding II is divided into two, and these two secondary winding parts are respectively connected. The field and toe magnet devices 5a and 5b are connected to each other in reverse star connection. That is, in one of the secondary winding portions, the negative polarity side terminals are commonly connected, and the three positive polarity side terminals are connected to, for example, the interconnection points between the thyristor and the diode of the field magnetism device 5a, respectively. In the other secondary winding portion, the positive polarity side terminals are commonly connected, and the three negative polarity side terminals are connected to the interconnection points between the thyristor and the diode of the field magnetism device 5b, respectively. Constitute.

Next, the operation of the electric vehicle traveling control device according to the present invention shown in FIG. 1 will be described.

In the case of power running, first, a current is applied to the armature group 3a, the field group 4a, the bypass diode 6a and the variable resistor 7a input terminal, and the variable resistor 7b, the armature group 3b, the field group 4b and the bypass diode 6b. Sink to decrease the resistance values of the variable resistors 7a and 7b to increase the vehicle speed. At the time when the resistance values of the variable resistors 7a and 7b become zero, the contactors 9a and 9b are turned on and the thyristors of the field torch devices 5a and 5b are turned on to shunt the armature current and to field the field. The field toe magnet devices 5a and 5b are controlled to reduce the current.

In the case of regenerative braking, the field currents are increased and the field toe magnet devices 5a and 5b are controlled so as to strengthen the field.

(Effect of the Invention) According to the present invention, as described above, the transformer 13 for stepping down or boosting the output of the three-phase AC auxiliary power supply device such as the motor generator serving as the power supply of the field magnetism device to an appropriate voltage is used. Since the secondary winding is divided into two parts and these secondary winding parts are connected to the field magnets and magnetism devices 5a and 5b in a star connection and the polarities of the windings are opposite to each other, the auxiliary power supply device has a positive polarity. During one half cycle, one of the field-magnet devices performs phase control, and during the negative half-cycle, the other field-magnet device controls phase. Therefore, the distortion of the waveform of the auxiliary power supply device is reduced, and the occurrence of even harmonics can be suppressed.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an example of an electric vehicle traveling control device according to the present invention, and FIG. 2 is a diagrammatic explanatory view showing a wiring arrangement of a transformer used in the present invention. 1 ... Current collector, 2 ... Main circuit breaker 3a, 3b ... Armature group, 4a, 4b ... Field group 5a, 5b ... Field toe device 6a, 6b ... Bypass diode 7a, 7b ... Variable resistor , 8a, 8b ... Induction shunt 9a, 9b, 10, 11, 12 ... Contactor 13 ... Transformer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Uyama 2-7-2 Yaesu, Chuo-ku, Tokyo Toyo Denki Seizo Co., Ltd. (56) Reference JP-A-54-102712 (JP, A) JP-A-SHO 55-29229 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A group of DC electric motors (3a, 3a) for driving an electric vehicle.
The field-field device (5a, 5b) consisting of a mixed bridge of two thyristors and diodes for field-processing the field field (4a, 4b) of b), and these field-field device (5a, 5b) An electric vehicle traveling control device comprising a transformer (13) for supplying a three-phase AC voltage from a three-phase AC power supply device, wherein the transformer (13) has a triangular primary winding (13-I). An electric vehicle in which the secondary winding (13-II) is two sets of opposite polarity star connection, and the three-phase output is respectively supplied to two field toe magnet devices (5a, 5b). Travel control device.