JPH06245316A - Controller for universal electric vehicle - Google Patents

Abstract

PURPOSE:To obtain a controller for universal electric vehicle in which AC power supply for air-conditioner, motor fan, etc., can be obtained regardless of AC section or DC section while saving one AC/ DC switcher. CONSTITUTION:A PWM control converter 9 connected with the secondary winding of a main transformer 5 is employed as an AC/DC converter in AC section and employed as an inverter in DC section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an AC / DC electric vehicle, and more particularly to a control device for an AC / DC electric vehicle capable of generating an AC voltage in a tertiary winding of a main transformer even in a DC section. Is.

[0002]

2. Description of the Related Art Generally, in order to drive an electric car, an overhead wire power supply is supplied to a power supply circuit system of the electric car via a pantograph, and a voltage from the power supply circuit system is supplied to a drive system. The purpose is achieved by driving the electric motor with the drive voltage of. By the way, recently
With the expansion of the metropolitan area, it has been promoted to extend the operating distance of one electric vehicle or to operate a so-called limited express type. In addition, VVVF is used as a drive system for electric vehicles.
(Variable voltage variable frequency) A method using an inverter and an induction motor has become popular. In order to adopt this method and realize an electric vehicle that operates a direct express train, it is necessary for the overhead power line to be capable of operating directly between the AC section and the DC section. Conventionally, to meet such demands,
For example, a control device for an AC / DC electric vehicle as shown in FIG. 3 has been proposed. Figure 3 shows the control equipment for AC / DC electric vehicles shown in "The 28th National Symposium on Cybernetics in Railroads," published on November 11, 1991, "Main circuit system of AC / DC inverters" on page 228. It is a block diagram. In FIG. 3, the overhead line 1 serves as a supply source of an AC power source in the AC section and a DC power source in the DC section, and the pantograph 2 connected to the overhead line 1 collects power from the overhead line 1. A circuit breaker 3 is connected to this pantograph 2.
An AC / DC switch 4 is connected to the circuit breaker 3. The AC side fixed contact 4a of the AC / DC switch 4 is connected to the main transformer 5 1
A pulse width modulation (PW) that grounds the secondary winding 5a and controls the secondary winding 5b of the main transformer 5 so that the output voltage is constant.
M) Connect to the input end of the control converter 9. Then, one output end of the pulse width modulation control converter 9 is connected to the AC side contact 11aa of the AC / DC switch 11a, the other output end of the pulse width modulation control converter 9 is grounded, and a DC voltage is applied to the AC voltage. Is connected to one input end of the VVVF inverter 13 for converting into VVVF inverter 13, and the other input end of the VVVF inverter 13 is connected to the movable contact 11ac of the AC / DC switch 11a.
Is connected to the electric motor 14. Further, the DC side fixed contact 11ab of the AC / DC switch 11a is connected to the DC side fixed contact 4d of the AC / DC switch 4 via the open switch 15. Further, the tertiary winding 5c of the main transformer 5 is connected to the input terminal of the auxiliary rectifier 10 that outputs a DC voltage, and one output terminal of the auxiliary rectifier 10 is connected to the AC side contact 11ba of the AC / DC switch 11b. Connecting. The other output terminal of the auxiliary rectifier 10 is grounded, and the other output terminal of the auxiliary rectifier 10 is connected to the other input terminal of the static converter (hereinafter referred to as SIV) 20. The input end of the movable contact 11b of the AC / DC switch 11b.
Connect to c. Further, the DC fixed contact 11bb of the AC / DC switch 11b is connected to the open switch 15 and the AC / DC switch 11B.
It is connected between the fixed contacts 11ab on the DC side of a.

Next, the operation will be described. First, in the AC section, an AC voltage is applied from the overhead wire 1 to the main transformer 5 via the pantograph 2. At this time, the movable contact 4b of the AC / DC switching device 4 is connected to the AC side fixed contact 4a, and the AC / DC switching is performed. The movable contact 11ac of the container 11a is connected to the AC side fixed contact 11aa. Then, the pulse width modulation control converter 9 controls the voltage from the main transformer 5 to be constant and outputs it as a DC voltage, supplies this output voltage to the VVVF inverter 13, and the VVVF inverter 13 supplies the supplied DC voltage to the AC voltage. And the electric motor 14 is driven by this AC voltage. In addition, the movable contact 11bc of the AC / DC switch 11b is connected to the AC side fixed contact 11ba,
AC power from the tertiary winding 5c of the main transformer 5 is rectified by an auxiliary rectifier (hereinafter referred to as ARF) 10 and DC power is supplied to the SIV 20. On the other hand, in the DC section, overhead line 1
From the pantograph 2, a DC voltage is applied, and at this time, the movable contact 4b of the AC / DC switch 4 is connected to the DC side fixed contact 4d, and the movable contact 11 of the AC / DC switch 11a is connected.
The ac is connected to the DC side fixed contact 11ab. And VV
The DC voltage supplied by the VF inverter 13 is converted into an AC voltage, and the AC voltage drives the electric motor 14.
Further, the movable contact 11bc of the AC / DC switch 11b is connected to the DC side fixed contact 11bb to supply DC power to the SIV 20.

[0004]

Since the conventional electric vehicle controller is constructed as described above, the SIV power source must be switched between the AC section and the DC section, and a large number of AC / DC switching devices are required. Further, since the SIV is used as a power source for the air conditioner, the electric blower, etc., it is necessary to increase the capacity of the SIV. Further, there is a problem that an ARF is required in addition to SIV.

The present invention has been made in order to solve the above-mentioned conventional problems, and one AC / DC switching device can be omitted, and it can be used for an air conditioner, an electric blower, etc. regardless of an AC section or a DC section. It is an object of the present invention to obtain a control device for an AC / DC electric vehicle in which the AC power supply can be omitted and the AIV can be omitted by obtaining the AC power supply of SIV and reducing the capacity of the SIV.

[0006]

A control device for an AC / DC electric vehicle according to the present invention includes a main transformer having a tertiary winding for an auxiliary circuit in which a primary winding is connected to a pantograph, and this main transformer. One terminal side is connected to a single or a plurality of secondary windings, and the AC power input from the one terminal side is converted into DC power having a constant voltage and output from the other terminal side, and Is connected to the voltage type converter that converts the DC power input from the terminal side into AC power and outputs from the one terminal side, and the pantograph is connected to one terminal side of the voltage type converter. An AC circuit to be connected, and a DC circuit connected to the pantograph, which connects the pantograph to the other terminal side of the voltage type conversion unit, and in the AC section, the pantograph is connected to the AC circuit and a DC section. It is obtained by a switching unit for connecting the pantograph to the DC circuit.

[0007]

The controller for the AC / DC electric vehicle according to the present invention is
By operating the voltage type converter as an AC / DC reverse converter, it is possible to generate an AC voltage in the tertiary winding of the main transformer even in the DC section, and to supply AC power to the equipment connected to the tertiary winding. Can be supplied.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings, taking as an example the case of being applied to a control device for a direct-current electric train. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, parts corresponding to those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted. In the first embodiment, the other terminal 9b of the pulse width modulation control converter 9 which is the voltage type conversion unit is directly connected to one input terminal 13a of the VVVF inverter 13, and the AC / DC switch 11a shown in FIG. Between the other terminal 9b of the pulse width modulation control converter 9 and one input terminal 13a of the VVVF inverter 13 and the open switch 1.
An AC / DC switch 11 is connected between the switch 5 and the switch 5. or,
The input terminal of the SIV 20 is directly connected to the tertiary winding of the main transformer 5, and the AC / DC switch 11b and the ARF 10 shown in FIG.
Is omitted. In FIG. 1, the AC input type SIV 20, the air conditioner, the electric blower 21 and the like are directly connected to the tertiary winding of the main transformer 5.

Next, the operation will be described. First, in the DC section, a DC voltage is applied from the overhead wire 1 via the pantograph 2, and at this time, the movable contact 4b of the AC / DC switch 4 is connected to the DC side fixed contact 4d, and the movable contact 11b of the AC / DC switch 11 is connected. Is connected to the DC side fixed contact 11d. Then, the VVVF inverter 13 converts the supplied DC voltage into an AC voltage, and this AC voltage is used to drive the motor 1
Drive 4 Further, the pulse width modulation control converter 9
The DC voltage supplied from one terminal 9b side is converted into an AC voltage, and AC power is supplied to the SIV 20, the air conditioner, the electric blower, etc. 21 connected to the tertiary winding 5c via the main transformer 5.

In the AC section, an AC voltage is applied from the overhead wire 1 to the main transformer 5 via the pantograph 2, and at this time, the movable contact 4b of the AC / DC switch 4 is already connected to the AC side fixed contact 4a. The movable contact 11b of the AC / DC switch 11 is already connected to the AC fixed contact 11a. Then, the pulse width modulation control converter 9 controls the AC voltage supplied from one terminal 9a of the pulse width modulation converter 9 connected to the secondary winding 5b of the main transformer 5 to be constant and controls the other terminal 9a from the other terminal 9a. Output as DC voltage,
This output voltage is supplied to the VVVF inverter 13,
The DC voltage supplied by the VF inverter 13 is converted into an AC voltage, and the AC voltage drives the electric motor 14.
In addition, the SIV20 connected to the main transformer 5 and the tertiary winding 5c
AC power is also supplied from the overhead wire 1 to the air conditioner, the electric blower, and the like 21.

Embodiment 2. Although the ARF shown in FIG. 3 is omitted in the first embodiment, the ARF 10 may be connected to the main transformer 5 as shown in FIG.

In the above embodiment, the AC / DC switching devices 4 and 11 compose the switching part of the claims, and the circuit including the AC / DC switching devices 4 and 11 and the open switch 15 composes a DC circuit. The circuit between the AC / DC switch 4 and the main transformer 5 constitutes an AC circuit.

[0013]

As described above, the control device for an AC / DC electric vehicle according to the present invention includes a main transformer section having a tertiary winding for an auxiliary circuit in which the primary winding is connected to a pantograph, and the main transformer section. One terminal side is connected in parallel to a single or a plurality of secondary windings of the transformer section, and the AC power input from this one terminal side is converted to DC power with a constant voltage and output from the other terminal side. Along with, a voltage type conversion unit that converts the DC power input from the other terminal side into AC power and outputs the AC power from the one terminal side, and is connected to the pantograph, and the pantograph is connected to the voltage type conversion unit. An AC circuit connected to one terminal side, connected to the pantograph, a DC circuit connected to the other terminal side of the voltage type conversion unit, and the pantograph to the AC circuit in the AC section. connection In the DC section, since the pantograph is provided with the switching unit for connecting to the DC circuit, one AC / DC switching unit can be omitted, and an air conditioner, an electric blower, etc. can be used regardless of the AC section or the DC section. AC power supply can be obtained, the capacity of the SIV can be reduced, and the ARF can be omitted by making the SIV of the AC input type, and thus the control device for the AC / DC electric vehicle can be obtained at a low cost. In addition to being able to do so, there is an effect that the size and weight can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a control device for a conventional AC / DC electric vehicle.

[Explanation of symbols]

 1 Overhead line 2 Pantograph 4 AC / DC switching device 5 Main transformer 9 Pulse width modulation control converter 11 AC / DC switching device 13 VVVF inverter

Claims (1)

[Claims] 1. A main transformer having a tertiary winding for an auxiliary circuit, a primary winding of which is connected to a pantograph, and one terminal side of which is connected to a single or a plurality of secondary windings of the main transformer. , Converting the AC power input from the one terminal side into DC power having a constant voltage and outputting from the other terminal side, and converting the DC power input from the other terminal side into AC power A voltage type converter that outputs from one terminal side, an AC circuit that is connected to the pantograph, and connects the pantograph to one terminal side of the voltage type converter, and the pantograph that is connected to the pantograph. A circuit for DC connected to the other terminal side of the voltage type converter, and a switch for connecting the pantograph to the circuit for AC in the AC section and connecting the pantograph to the circuit for DC in the DC section. Controller of AC to DC electric vehicle characterized by comprising a part, the.