RU2142886C1 - Vehicle noncontact power supply system - Google Patents

Abstract

FIELD: electrified transport. SUBSTANCE: proposed system has device (converter) for converting 380 V, 50 Hz alternating current into higher frequency alternating current, and short-circuited feeder. Inductive power receiver and capacitors featuring higher capacitance per volume unit are installed on vehicle. Additional inductive power receiver with rectifier provides charging of capacitors when traction motors operate at low load and at coasting. Power consumption of traction motors is provided through DC thyristor regulator. Proposed system is notable for higher operation reliability as it provides normal functioning of vehicle at current through feeder whose value corresponds to motor current at continuous duty. EFFECT: enhanced operation reliability. 1 dwg

Description

 The present invention relates to electrical engineering, in particular to an electrified transport.

 A known system of non-contact power supply of vehicles (prototype), containing a converter of an alternating three-phase voltage of 380 V, 50 Hz to alternating current of high frequency. The output of the specified converter is connected to a two-wire squirrel-cage feeder laid along the path of movement. At the same time, a power receiver is installed in the vehicle in the form of a core made of ferromagnetic material with a winding, the terminals of which are connected to the input of the rectifier, the output of which is connected to the traction motors of the vehicle, which causes significant losses of electricity in the feeder.

 The technical task of the invention is the creation of a vehicle power supply system that ensures their normal functioning at a feeder current, the value of which corresponds to the current of the traction motors in continuous operation.

 The essence of the invention lies in the fact that in the above-described contactless power supply system on the vehicle, capacitors are installed that have an increased energy intensity per unit volume, and an additional energy receiver with a rectifier that provides charging of these capacitors during periods of operation of traction engines with low load or in coast mode, and introduced a thyristor DC regulator, the input of which is connected to the capacitors, and the output to the traction motors.

 The drawing shows a schematic diagram of the proposed system of contactless energy supply of vehicles.

 The proposed non-contact power supply system for vehicles contains a three-phase alternating voltage converter 380 V, 50 Hz to an alternating current of increased frequency 1, the output of which is connected to a short-circuited feeder 2, laid along the driving path, the first energy receiver 3, made in the form of an open ferromagnetic core with a winding and installed on a vehicle with the possibility of inducing electromotive force in its winding by an alternating magnetic field of the feeder, a capacitor 4 forming a resonance an oscillating circuit with a winding of the first energy receiver, a rectifier on diodes 5-8 with a filtering capacitor 9, included with the possibility of flowing through diodes 5-8 with a filtering capacitor 9, included with the possibility of flowing through the diodes 5-8 of an alternating current of increased frequency under the influence of the EMF of the first energy receiver 3 and connected by the output to the capacitor 9 and the traction motor. Additionally, a second energy receiver 10 is installed on the vehicle, comprising a ferromagnetic core and a winding, a capacitor 11 forming a resonant oscillating circuit with a winding of the second energy receiver, a rectifier on diodes 12-15, included with the possibility of a higher frequency alternating current flowing through its diodes under the action of an electromotive force of the second an energy receiver, a filtering capacitor of increased energy intensity 16, connected to the output terminals of the rectifier on diodes 12-15, and a semiconductor controller DC 17, the input of which is connected to the capacitor 16.

 The traction motor 18 with the excitation winding 19 of the vehicle is connected to the output of the rectifier on diodes 5-8 and is connected to the capacitor 16 through a semiconductor controller 17.

 The action of the proposed energy supply system is as follows.

 In normal operation, when the converter 1 is operating, an alternating current of increased frequency flows through a short-circuited feeder 2. The alternating magnetic field created by him induces an EMF in the windings of the first and second energy receivers 3 and 10. Under the influence of the EMF of the first energy receiver, an alternating current of increased frequency flows through a capacitor 4, diodes 5, 6, 7, 8 and a capacitor 9. At the same time, the presence of a filter 9 in the rectifier and capacitor system converts the specified current into direct current and reduces its alternating current component in the load circuit. In the case when the natural frequency of the oscillations of the circuit formed by the power receiver 3 and the capacitor 4 is equal to the frequency of the current through the short-circuited feeder 2 in the presence of the capacitor 9 provides the greatest value of the current through the traction motor in the steady-state operation mode.

 The presence of the second energy receiver 10 on the vehicle ensures that the alternating current of increased frequency flows through the capacitor 11 and the rectifier diodes 12, 13 or 14, 15. In this case, the DC component of the output of the rectifier will charge the capacitor 16 and increase the voltage across it to a predetermined level. A further increase in voltage across the capacitor 16 is limited by the energy consumption of the traction motors through the thyristor controller 17.

 The energy stored in the capacitor 16 will provide an opportunity to increase the current through the traction motor in transient start-up modes to a value exceeding its value in the steady state traction.

Used sources
1. Application EP 0253345, A2 (INDUSTRAN CORPORATION) 01.20.88.

Claims (1)

 A non-contact power supply system for vehicles containing a three-phase alternating voltage converter 380 V, 50 Hz to an alternating current of increased frequency, the output of which is connected to a short-circuited feeder laid along the driving path, the first power receiver mounted on the vehicle with the possibility of pointing in its winding on a ferromagnetic core electromotive force with an alternating magnetic field of the feeder, a capacitor forming a circuit with a winding of the power receiver, a rectifier with a filter cond with a sensor included with the possibility of flowing through its diodes of alternating current of increased frequency under the action of the electromotive force of the first energy receiver and connected by an output to the traction motor, characterized in that the vehicle is additionally equipped with a second energy receiver with a capacitor, a rectifier included with the possibility of flowing through its diodes of alternating current increased frequency current under the action of the electromotive force of the energy receiver and equipped with an increased energy at the output of the filtering capacitor bones, and a semiconductor DC regulator, the input of which is connected to the specified capacitor, and the output is connected to the traction motor.