摘要:
An electric motor vehicle main circuit system includes an AC-DC switching circuit switching a supply destination of electric power according to a type of supplied power from an overhead wire, a transformer, a tap changer switching tap positions of the transformer, a CNV converting an output of the tap changer into a direct-current voltage, an AC contactor opening and closing a power supply path between the tap changer and the CNV, an FC accumulating an output of the CNV or the overhead wire, a CH stepping up an output of the FC, an FC accumulating an output of the CH, an INV converting an output of the FC into a desired alternating-current voltage, a DC contactor opening and closing a power supply path between the AC-DC switching circuit and the CH, and a control section controlling the tap changer, the AC contactor, the DC contactor, the CNV, and the CH.
摘要:
An energy storage system for connection to a traction power supply that provides power to an electric vehicle. The energy storage system includes a power controller that controls a DC-DC converter to transfer electrical energy from the traction power supply to electrical energy storage when the train is braking. The power controller also controls the converter to transfer electrical energy from the electrical energy storage to the traction power supply when the train is accelerating. The controller slows the rate of energy transfer when upper and lower voltage boundary limits of the electrical energy storage are approached, respectively.
摘要:
A motor drive circuit for a rail vehicle has a step-up converter, which is disposed at the input of the motor drive circuit, and which converts a mains DC voltage, at the input of the motor drive circuit into an intermediate circuit DC voltage. A pulse rectifier, which is downstream from the step-up converter, can be connected at the output to a drive motor of the rail vehicle and it is capable of converting the intermediate circuit DC voltage of the step-up converter into a motor drive voltage for driving the drive motor. A control unit activates the step-up converter in operation such that the converter generates the predetermined rated intermediate circuit DC voltage for a mains DC voltage below a predetermined rated intermediate circuit DC voltage as the intermediate circuit DC voltage. The control unit is designed such that it activates the step-up converter for a mains DC voltage above the rated intermediate circuit DC voltage such that the converter generates an intermediate circuit DC voltage identical to the mains DC voltage or an intermediate circuit DC voltage, which is greater at most by a predetermined offset value, and feeds the intermediate circuit DC voltage into the pulse rectifier.
摘要:
The present disclosure is concerned with a multilevel converter including a transformer arrangement comprising at least two transformer units, each with primary and secondary windings and a transformer core structure. The latter are merged into one shared transformer core comprising at least one return limb that is part of the closed magnetic flux paths of the at least two transformer units. Sharing return limbs among individual transformer units, in particular when fed with primary voltage signals that have a certain phase shift between each other, helps to reduce the volume and weight as compared to an individual transformer core structure for each of the transformer units. The multilevel converter is beneficially used in railway traction applications.
摘要:
A method for operating a traction converter circuit for coupling to an electric DC voltage network is stated, where the traction converter circuit comprises a network converter, which network converter on the DC voltage side is connected with a DC voltage circuit, wherein the DC voltage circuit can be switched to the electric DC voltage network, a transformer with a primary winding and a secondary winding, wherein the network converter on the alternating voltage side is connected with the primary winding of the transformer, a converter unit, which converter unit on the alternating voltage side is connected with the secondary winding of the transformer and where the network converter is controlled by means of a predeterminable network converter control signal (SN) for the setting of the network converter alternating voltage (UG). To simplify the traction converter circuit the network converter control signal (SN) according to the method is a rectangular signal which follows a reference rectangular signal (SClk).
摘要翻译:一种用于操作牵引转换器电路以耦合到电力直流电压网络的方法,其中牵引转换器电路包括网络转换器,该直流电压侧的网络转换器与直流电压电路连接,其中直流电压电路 可以切换到直流电压网络,具有初级绕组和次级绕组的变压器,其中交流电压侧的网络转换器与变压器的初级绕组连接,转换器单元,转换器单元在交替 电压侧与变压器的次级绕组连接,并且网络转换器通过可变网络转换器控制信号(S SUB N N)来控制,用于设置网络转换器交流电压(U < SUB> G SUB>)。 为了简化牵引转换器电路,根据该方法的网络转换器控制信号(S N N N N)是遵循参考矩形信号(S SUB> CLK)的矩形信号。
摘要:
Power converter system topologies comprise a first DC/DC converter to pull a positive rail of a high voltage bus up, while a second DC/DC converter pushes a negative rail of the high voltage bus down. One or both the DC/DC converters may be bi-directional. Such topologies are suitable for use with separate primary power sources, and/or auxiliary power sources. Such topologies may include a DC/AC converter, which may be bi-directional. Such topologies may include one or more auxiliary DC/DC converters, which may be bi-directional. Multiple substrates, including at least one stacked above another may enhance packaging.
摘要:
An electric vehicle control device including a collector for extracting power from an overhead wire and a circuit breaker for breaking the power. The power includes first AC power in AC power source zone and first DC power in DC power source zone. The device also includes a changeover device for changing over the power to apply the first AC power to an AC side or the first DC power to a DC side, a transformer connected to the AC side of the changeover device for transforming the first AC power into second AC power, a first opening/closing device, a power converter for converting the second AC power to second DC power and an inverter for converting the second DC power into third AC power. The third AC power is supplied to drive an electric motor. The device further includes a second opening/closing device, a filter inductor and a filter capacitor connected between positive and negative terminals of the DC input side of the inverter. Whereby during operation in the AC power source zone the first opening/closing device is closed and the second opening/closing device is opened, while during operation in the DC power source zone the first opening/closing device is opened and the second opening/closing device is closed.
摘要:
In a transportation system, a vehicle driven by an induction motor, is guided along a given path. Adjacent to the path is at least a section of electrical conductor which is electrically connected to the induction motor by means of pickup or collector shoes on the vehicle. The speed of the vehicle is controlled by varying the frequency of the electrical power fed to the electrical conductor. This can be accomplished by using a power source whose frequency varies with time or by using several power sources, each having a different frequency; each of such power sources being connected to a different segment of the section; such segments being insulated from each other.