JPS635963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device in an electric railway vehicle.

In electric railway vehicles, as shown in FIG. 1, for example, two vehicles 1 and 2 form one formation,
The vehicle 1 is provided with two bogies 3 and 4, and the vehicle 2 is provided with two bogies 5 and 6. 4 trolleys 3, 4, 5,
Each of the vehicles 6 is equipped with a two-axle wheel, and each of the wheels has an electric motor for driving the wheel, the bogie 3 of the vehicle 1 has two electric motors M _A and M _{B , and the bogie 4 of the vehicle 1 has two electric motors M A and M B} . The bogie 5 of the vehicle 2 has two electric motors M _E and M _F , and _the bogie 6 of the vehicle ₂ has two electric motors
M _G and M _H are each provided via a gear device (not shown) for transmitting rotational force.

On the other hand, as the distance traveled by a vehicle increases, the wheels wear out and the diameter of the wheels gradually decreases, and since the degree of wear differs from wheel to wheel, an imbalance occurs in the load sharing between the electric motors that drive each wheel. For this reason, the motor main circuit of an electric railway vehicle can be configured for each bogie or each vehicle by connecting the motor as shown in Figure 2 for DC electric cars and Figure 3 for AC electric cars. The load sharing of each motor is averaged.
That is, in both cases of direct current and alternating current, a circuit in which four electric motors M A , M _B , M C , MD provided in the vehicle 1 are connected in series, that is, a circuit in which the four electric motors M _A , M B , M _C , _MD provided in the vehicle 1 are connected in series, that is, the bogie 3 of the vehicle 1
electric motors M _A , M _B and electric motors of bogie 4 of vehicle 1
A circuit in which field windings F _A , F _B and F _C , F _D of M _C , M _D and armatures A _A , A _B , and A _C , A _D are connected in series, and a vehicle 2 Four electric motors M _E ,
A circuit in which M _F , M _G , and M _H are connected in series, that is, electric motors M _E , M _F of the bogie 5 of the vehicle 2 and the vehicle 2
The field windings F _E of the electric motors M _G and M _H of the bogie 6 of
F _F , F _G , F _H and a series circuit in which armatures A _E , _AF and A _G , _AH are connected in series are connected in parallel.

Conventionally, as the mileage of a vehicle increases and the wear of the wheels progresses, for example, in the case of O-series trains of the Japan National Railways Shinkansen, when the difference in diameter of two wheels in the same bogie exceeds 4 mm, In the vehicle, the sum of the differences in the diameters of the two wheels of each of the two bogies is
When the diameter of each wheel exceeds 10mm, in addition, the diameter of each wheel is 830mm.
The trolley will be replaced if either of the following applies:

As mentioned above, conventionally, electric vehicle drive systems connect electric motors in series for each vehicle.
Furthermore, the conditions for replacing a bogie due to wheel wear are determined by the size of the difference in wheel diameter within the same bogie or within the same vehicle.
In reality, wheel diameters may differ from one truck to another or from one vehicle to another, and as the distance traveled by the vehicle increases and the wear of the wheels progresses, an imbalance occurs in the load sharing of the electric motors for each vehicle. That is, as the diameter of the wheel decreases, the rotational speed increases, and as a result, the current flowing through the series circuit of the armature of the motor that drives the wheel with the small diameter increases, and wear and tear on the brushes, commutator, etc. of the motor increases. Alternatively, due to an imbalance in load sharing, each vehicle may not be able to produce the desired output.

On the other hand, in recent years, in the control of electric railway vehicles, chopper control with regeneration function has been introduced for DC electric cars and forward/reverse converter control with regeneration function has been introduced for AC electric cars due to energy saving requirements. be. At this time, in order to easily and quickly switch between power running and regenerative braking modes, a separately excited split-wound motor is used as the drive motor. In this case, power control can be performed for each series circuit constituting a parallel circuit of the drive device in which the armatures of the drive motors are connected in series and parallel.

The present invention has been made in view of the above circumstances, and its purpose is to connect the armatures of separately excited split-wound motors that drive wheels in series and parallel, and to connect the field windings of separately excited split-wound motors in series. In the drive device of the connected electric cars, the armatures of the motors of different bogies are combined to form a series circuit, a plurality of these series circuits are combined to form a parallel circuit, and each series circuit forming the parallel circuit is It is an object of the present invention to provide a drive device for an electric vehicle that can eliminate the above-mentioned problems by eliminating imbalance in load sharing among electric motors by performing power control.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric vehicle drive device according to the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG. 1, two vehicles 1 and 2 constitute one formation, and
The bogie 3 of the vehicle 1 is provided with two electric motors M _A , M _B , the bogie 4 of the vehicle 1 is provided with two electric motors M _C , _MD , and the bogie 5 of the vehicle 2 is provided with two electric motors M _E , M _F , Two electric motors M _G and M _H are each provided on the bogie 6 of the vehicle 2 .

As shown in FIG.
A parallel circuit of a current limiting resistor 11 and a filter reactor 12 for removing harmonics are connected in series. Further, in this series circuit, the smoothing reactor 13 and the two electric motors M _A , M _B of the bogie 3 of the vehicle 1 and the armatures A A , A B of the two electric motors M _G , M _H of the bogie 6 of the vehicle ₂ are connected _. ，
Series circuit _S1 of A _G , A _H and chopper 14, smoothing reactor 15 and two electric motors of bogie 4 of vehicle 1
M _C , M _D , and two electric motors of bogie 5 of vehicle 2
M _E , M _F armature A _C , A _D , A _E , A _F and chopper 1
A parallel circuit with a series circuit S ₂ of 6 is connected. In addition, smoothing reactor 13 and armatures A _A , A _B , A _G ,
A freewheeling diode 17 for current _smoothing is connected in parallel with _the series circuit _{S1 of A} , A _F 's series circuit S ₂ is connected in parallel with a freewheeling diode 18 for current smoothing, the anode of which is connected to the smoothing reactor 1.
It is connected so that it is on the 5 side. Further, the connection point between the chopper 14 and the chopper 16 is grounded via a grounding switch 19. On the other hand, one pole of the filter capacitor 20 is connected to the connection point between the filter reactor 12 and the smoothing reactor 13, and the other pole of the filter capacitor 20 is connected to the connection point between the chopper 14 and the chopper 16. A smoothing circuit is constituted by the filter capacitor 20.

On the other hand, the electric motor used in this case is a separately excited split-wound type, and an AC power source (not shown) is connected to the primary side of the transformer 21, and the secondary side of the transformer 21 is connected to the two through the reactor 22. The electric motors M _A , M _B , _MC , _MD installed in the vehicle 1 and the electric motor installed in the vehicle 2 are connected to the input terminal of a rectifier 23 consisting of a thyristor and two diodes, and are connected to the output terminal of the rectifier 23 . A series circuit of M _E , M _F , M _G , and M _H is connected.

In the above-mentioned circuit, the DC power inputted from the pantograph 7 through the series circuit of the disconnector 8, the shingle breaker 9, the closed contactor contact 10, and the filter reactor 12 is connected in series through the smoothing reactor 13. Armatures A _A , A B of electric motors M _A and M _B provided on the bogie 3 _of the connected vehicle 1 and armatures A _G of the electric motors _{MG and MH provided} on the bogie 6 of the connected vehicle 2 ,
_{A _ _ _ _} motor M _E , armature A _E of M _F ,
Supplied to A _F. The power supplied to the armatures A _A , A _B , A _G , and _AH is controlled by the chopper 14, and the power supplied to the armatures A _C , A _D , A _E , and _AF is controlled by the chopper 14 . It is carried out by Chiyotsupa 16.

On the other hand, AC power input from an AC power source via a transformer 21 is converted to DC by a rectifier 23 via a reactor 22, and is then used to power eight electric motors M _A , M _B , _MC ,
Each field winding F _A of M _D , M _E , M _F , M _G , M _H ,
The electric motors M _{A , M B} , _{M C} , _{M D} , _{M E} , M _F , _{M G} , _{M H} are supplied to Excite.

In the above circuit, armatures A A and A _B of electric motors M _{A and} M _B installed on bogie 3 of vehicle 1 and vehicle 2
The armatures of electric motors M _G and M _H installed on the trolley 6 of
A _G , A _H and the reactor 13 are connected in series to form a series circuit S ₁ , and armatures A _C and A _D of motors M _C and _MD provided on the bogie 4 of the vehicle 1 and the vehicle 2
The armatures of electric motors M _E and M _F installed on the trolley 5 of
A _E , A _F and the reactor 15 are connected in series to form a series circuit _S2 , and the total diameter of the wheels driven by the electric motors M _A , M _B and the diameter of the wheels driven by the electric motors M _G , M _H are combined. A relationship that minimizes the difference between the sum of the total diameters, the total diameter of the wheels driven by electric motors M _C and _MD , and the sum of the total diameters of wheels driven by electric motors M _E and M _F , respectively. The armatures of the electric motors that drive each wheel are connected in series and parallel.

As described above, in this embodiment, the sum of the diameters of the wheels driven by the motors connected in series in the first series circuit S ₁ constituting the series-parallel circuit and the motors connected in series in the second series circuit S ₂ In order _to combine the electric motors in such a way that the difference between the diameter of the wheels and the total diameter of the driven wheels is minimized, the armatures A _{A ,}
A _B and two electric motors installed on the bogie 6 of the vehicle 2
A series circuit between the armatures A _G and A _H of M _G and M _H and the chopper 14, the armatures A _C and A _D of the two motors M _C and _MD installed on the bogie 4 of the vehicle 1, and the vehicle. 2 trolley 5
Two electric motors M _E , armature A _E of M _F ,
Since the A _F and the series circuit of the Chotsupa 16 are connected in parallel, the conditions for replacing the bogie due to wheel wear as described above are established, and even if there is a difference in diameter between each wheel, the condition when the vehicle is running is fixed. The armature currents flowing through the plurality of series circuits become approximately equal, and the load sharing of the electric motors among the vehicles is averaged.

The above embodiment is for a DC electric car, but in the case of an AC electric car, as shown in FIG.
The primary winding 25a is connected to one terminal of the primary winding 25a, and the other terminal of the primary winding 25a is grounded. transformer 2
The secondary winding 25b of No. 5 is connected to the input terminal of a rectifier 26 composed of four thyristors, and the rectifier 2
The two electric motors M installed on the bogie 3 of the vehicle 1 _A , M _B armature A _A , A _B
and two electric motors M _G installed on the bogie 6 of the vehicle 2,
Armature A _G of M _H is connected to series circuit S ₃ of A _H.

Further, the secondary winding 25c of the transformer 25 is connected to the input terminal of a rectifier 31 composed of four thyristors, and one output terminal 31a of the rectifier 31 is in contact with the disconnector 32 and the current limiting resistor 33. The two electric motors M _C and M _D installed on the bogie 4 of the vehicle 1 are connected through a parallel circuit of the contacts 34 of the device and a series circuit of the reactor 35.
The armatures A _C and _AD of the vehicle 2 are connected to the series circuit S ₄ of the armatures A _G and _AF of the two electric motors M _E and _MF provided on the bogie 5 of the vehicle 2.

Series circuit S ₃ with armatures A _A , A _B , A _G , A _H and series circuit with armatures A _C , A _D , A _E , _AF as described above
_S4 are connected in parallel by connecting the other output terminal 26b of the rectifier 26 and the other output terminal 31b of the rectifier 31, and by connecting the negative sides of each of the armatures _AH and _AF . Ru. Furthermore, the rectifier 26
The output terminal 26b of the rectifier 31 and the output terminal 31b of the rectifier 31
is connected to one output terminal 36a of a rectifier 36 composed of four thyristors, the other output terminal 36b of the rectifier 36 is connected to one output terminal 37a of a rectifier 37, and the other output terminal 37b of the rectifier 37 is connected to one output terminal 38a of the rectifier 38, the other output terminal 38b of the rectifier 38 is connected to one output terminal 39a of the rectifier 39,
The other output terminal 39b of the rectifier 39 is connected to the armature A _H
and is connected to the connection point of armature A _F. Note that the input terminal of the rectifier 36 is connected to the secondary winding 25d of the transformer 25.
, the input terminal of the rectifier 37 is connected to the secondary winding 25e of the transformer 25, and the input terminal of the rectifier 38 is connected to the transformer 25.
The input terminal of the rectifier 39 is connected to the secondary winding 25f of the transformer 25, and the input terminal of the rectifier 39 is connected to the secondary winding 25g of the transformer 25, respectively.

On the other hand, the secondary winding 25h of the transformer 25 is connected to the input terminal of a rectifier 40 composed of two thyristors and two diodes, and the output terminals of the rectifier 40 are connected to the motors M _A , M _B , M _G , M _H , M _C , M _D ,
_Field windings F _A , F _B , F _G , F _{H ,} F _C , F _E ,
A series circuit of F _F is connected.

In the above circuit, the AC power input via the pantograph 7 is stepped down by the transformer 25, further converted to DC by the rectifier 26, and then
_7. Armatures A A , A _B of electric motors M _A , M _B installed on the bogie 3 of the vehicle 1 connected in series via the contact point 29 of the contactor in a closed circuit state and the smoothing reactor 30
and electric motors M _G , M _H provided on the bogie 6 of the vehicle 2
is supplied to armatures A _G and A _H. Also, rectifier 3
The electric motors M _C , M installed on the bogie 4 of the bogie 1 of the vehicle 1 are connected in series through the breaker 32 , the contacts 33 of the contactor in the closed circuit state, and the smoothing reactor 35 . It is supplied to the armatures A _C and A _D of _D and the armatures A _E and _AF of the electric motors M _E and M _F provided on the bogie 5 of the vehicle 2. In addition, the rectifiers 26 and 4
By adjusting the firing angle of the thyristors constituting the rectifiers 36, 37, 38, 39,
The voltages of A _A , A _B , A _G , and A _H are controlled by adjusting the firing angles of the thyristors that constitute the rectifier 31 and the four rectifiers 36 , 37 , 38 , and 39 . Voltage control of _C , A _D , A _E , and _AF is performed.

On the other hand, AC power input from the secondary winding 25h of the transformer 25 is converted to DC by the rectifier 40, and the electric motors M _A , M _B , _MC , M _D , M _E , _MF , M _G , M _H Each field winding F _A , F _B , F _C , F _D , F _E , F _F , F _G ,
_FH is supplied to electric motors M _A , M _B , M _C , M _D ,
M _E , M _F , M _G , and M _H are each excited.

In the above circuit, armatures A A and A _B of electric motors M _{A and} M _B installed on bogie 3 of vehicle 1 and vehicle 2
The armatures of electric motors M _G and M _H installed on the trolley 6 of
A _G and A _H are connected in series to form a series circuit _S3 , and electric motors M _C and M _D provided on the bogie 4 of the vehicle 1 are connected in series.
The armatures A _C and A _D of the motors M E and the armatures A _E and A _F of the motors M _E and M _F provided on the bogie 5 of the vehicle 2 are connected in series to form a series circuit _S4 , and the motors M _A , The sum of the diameters of the wheels driven by M _B and the electric motor M _G , the sum of the diameters of the wheels driven by M _H and the electric motor M _C , the sum of the diameters of the wheels driven by M _D and the electric motor M _E , The circuit is configured so that the difference between M _F and the sum of the diameters of the wheels to be driven is minimized.

As described above, in this embodiment, the sum of the diameters of the wheels driven by the motors connected in series in the first series circuit _S3 constituting the series-parallel circuit and the motors connected in series in the second series circuit _S4 . In order _to combine the electric motors in such a way that the difference between the diameter of the wheels and the total diameter of the driven wheels is minimized, the armatures A _{A ,}
A _B and two electric motors installed on the bogie 6 of the vehicle 2
Series circuit of M _G and M _H with armature A _G and A _H and vehicle 1
The armatures A _C and A _{D of the two electric motors M C and MD installed on the truck 4 of the vehicle 2 and the armatures A E and A of} the two electric motors M _E and _MF installed on the truck 5 of the vehicle 2. Since the series circuit with _F is connected in parallel, even if the condition for replacing the bogie due to wheel wear is determined as described above, the load sharing of the electric motor between the vehicles can be averaged as in the embodiment shown in Fig. 4. be converted into

The above-mentioned _embodiment is a case in which one train is composed of two vehicles, but as shown in _FIG .
When composing a drive device with electric motors M _C and _MD installed in pantograph 7, as shown in Fig. 7,
A high-speed shield breaker 9, a parallel circuit of a contactor contact 10 and a current-limiting resistor 11, and a filter reactor 12 for removing harmonics are connected in series via a disconnector 8. Furthermore, a smoothing reactor 1 is added to this series circuit.
3, the series circuit of the motor M A of one of the motors M _A of the bogie 3 of the vehicle 1 and the armatures A _A and A _C of the motor M _C of one of the bogies 4 and the chopper 14 , the smoothing reactor 15 and the vehicle 1
The parallel circuits of the armatures A _B and _AD of the other electric motor M _B of the truck 3 and the other electric motor M _D of the truck 4 and the series circuit of the chopper 16 are connected. Further, a freewheeling diode 17 for current smoothing is connected in parallel with the series circuit of the smoothing reactor 13 and the armatures A _A and A _C so that its anode is on the side of the smoothing reactor 13, and the smoothing reactor 15 and the electric Child
A freewheeling diode 18 for current smoothing is connected in parallel with the series circuit of A _B and A _D so that its anode is on the smoothing reactor 15 side. Further, the connection point between the chopper 14 and the chopper 16 is grounded via a grounding switch 19. On the other hand, one pole of the filter capacitor 20 is connected to the connection point between the filter reactor 12 and the smoothing reactor 13, and the other pole of the filter capacitor 20 is connected to the connection point between the chopper 14 and the chopper 16. A smoothing circuit is constituted by the filter capacitor 20.

On the other hand, an AC power source (not shown) is connected to the input terminal of a rectifier 23 consisting of two thyristors and two diodes, and the output terminal of the rectifier 23 has four
Field windings of each motor M _A , M _B , M _C , _MD
A series-connected circuit of F _A , F _B , F _C , and F _D is connected.

In the above circuit, DC power input from the pantograph 7 through the series circuit of the disconnector 8, the shingle breaker 9, the closed contactor contact 10, and the filter reactor 12 is connected in series through the smoothing reactor 13. It is supplied to the armature A A of the electric motor M _A provided on the bogie 3 _{of the connected vehicle 1 and the armature A C of} the electric motor M _C provided on the bogie 4, and is also connected in series via the smoothing reactor 15. It is supplied to the armature A B of the electric motor M _B installed on the truck ₃ and the armature A _D of the electric motor M _D installed on the truck 4. armature
The control of the power supplied to A _A and A _C is
The chopper 16 controls the power supplied to the armatures A _B and A _D.

On the other hand, the AC power input from the AC power source is converted to DC by the rectifier 23 and the electric motors M _A , M _B , _MC ,
It is supplied to each field winding F _A , F _B , F _C , FD of _{M D to} excite the electric motors M _A , M _B , _MC , M _D , respectively.

In the above circuit, the armature A of the electric motor M _A provided on the bogie 3 of the vehicle 1, _the armature A _C of the electric motor M _C provided on the bogie 4, and the reactor 13 are connected in series to form a series circuit S. ₅ and also includes vehicle 1
The armature A B of the electric motor M _B installed on the truck 3 of the truck 4 is connected in series with the armature A _D of the electric motor M _D installed on the truck 4 and the reactor 15 to form a series circuit _S6 , and the motor _M The circuit is configured so that the difference between the total diameter of wheels driven by _A and _MC and the total diameter of wheels driven by electric motors _MB and _MD is minimized.

As described above, in this embodiment, the sum of the diameters of the wheels driven by the motors connected in series in the first series circuit _S5 constituting the series-parallel circuit and the motors connected in series in the second series circuit _S6 . In order to combine the electric motors so that the difference between the _total diameter _of the wheels driven by Series circuit between armature A _C of M _C and tipper 14, and electric motor installed on bogie 3 of vehicle 1
Since the armature A _B of M _B , the armature A _D of the electric motor M _D provided on the bogie 4, and the series circuit of the chopper 16 are connected in parallel, the conditions for replacing the bogie due to wheel wear as described above is determined, the load sharing of electric motors among vehicles is averaged.

As explained above, in the present invention, in an electric vehicle drive device in which electric motors are connected in series and parallel,
By combining the electric motors of different carts to form a series circuit, and by combining the series circuits to form a parallel circuit, wheels driven by the motors connected in series in the first series circuit forming the parallel circuit are formed. The motors are combined to form a series-parallel circuit so that the difference between the total diameter of the wheels and the total diameter of the wheels driven by the series-connected motors in the second series circuit forming the parallel circuit is minimized. Furthermore, since the power supplied to the electric motors constituting each of the series circuits constituting the parallel circuit can be controlled for each series circuit, it is possible to average the load sharing of the electric motors between vehicles or bogies. By averaging the current flowing through each series circuit, it prevents severe wear and tear on the brushes, commutator, etc. of a particular motor, and also prevents the situation where the desired output cannot be produced due to unbalanced load sharing. can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram of the electric motor of the vehicle, Fig. 2 is a circuit diagram showing the drive device of a DC electric car, Fig. 3 is a circuit diagram showing the drive device of an AC electric car, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a circuit diagram showing another embodiment of the present invention, FIG. 6 is a layout diagram of a vehicle electric motor, and FIG. 7 is a circuit diagram showing still another embodiment of the present invention. be. 1, 2...Vehicle, M _A , M _B , M _C , M _D , M _E ,
M _F , M _G , M _H ……Separately excited split-wound motor, A _A , A _B ,
A _C , A _D , A _E , A _F , A _G , A _H ... Armature, F _A , F _B ,
F _C , F _D , F _E , F _F , F _G , F _H ...field winding, 14,
16... Chiyotsupa, 26, 31, 36, 37, 3
8,39... Rectifier.

Claims (1)

[Scope of Claims] 1. An electric vehicle having a plurality of bogies supporting a plurality of axles each having a pair of wheels, and a plurality of separately excited split-wound DC motors provided for each pair of wheels. A driving device for an electric vehicle, comprising a plurality of rows of armature circuits in which armatures of the above are connected in series-parallel relationship, and a circuit in which field windings of a plurality of separately excited split-wound DC motors are connected in series, The difference between the total diameter of wheels driven by series-connected motors in one row of armature circuits and the total diameter of wheels driven by series-connected motors in other rows of armature circuits is minimized. The electric motors of different bogies are connected in series with each other so that the electric power control means are connected in series for each row of the armature circuit, and each series circuit consisting of the armature and the power control means is connected in parallel. A drive system for electric cars.