CN213383905U

CN213383905U - Charging inversion system for electric vehicle under mine

Info

Publication number: CN213383905U
Application number: CN202021980094.0U
Authority: CN
Inventors: 姜汉军; 王春华; 桑涛; 方文杰
Original assignee: Changzhou Development and Manufacture Center Co Ltd
Current assignee: Changzhou Development and Manufacture Center Co Ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-06-08
Anticipated expiration: 2030-09-10

Abstract

The utility model relates to a charging inversion system for electric vehicles under a mine, which comprises a six-phase motor, wherein the six-phase motor is provided with two mutually independent three-phase windings which are respectively a first winding and a second winding; the first winding and the second winding are respectively connected with a control circuit and an inverter circuit; the second winding is connected with an inductor; the battery pack is provided with a charging state and a discharging state; the power output end of the external power grid is connected with the inverter circuit and the control circuit through the rectifying circuit, and the switching of the normal running state of the vehicle, the charged state of the vehicle and the charged state of other vehicles is carried out through the switch component. The utility model can charge the vehicle underground, and increase the endurance mileage; the dependence on the direct current charging pile is reduced, the rectifying device is used as a simple charging pile, and the cost is reduced; the inductance is increased, the control mode is changed, and weak magnetic control is not used during charging.

Description

Charging inversion system for electric vehicle under mine

Technical Field

The utility model relates to an electric control system, especially a contravariant system that charges for mine electric vehicle in pit.

Background

Because the explosion-proof diesel engine trackless rubber-tyred vehicle has obvious problems of poor safety, soft brake, high four-high one-low (namely, high exhaust emission, high noise, high failure rate, high operating cost and low efficiency) and the like in the actual operation in the pit, the electromotion of the mining explosion-proof trackless rubber-tyred vehicle becomes the underground development trend in recent years, and novel explosion-proof trackless rubber-tyred vehicles such as a man car, a patrol car, a command car and a small tonnage material car (the carrying quality is not more than 5t) which take lithium batteries as power become the focus of research and development and application (hereinafter referred to as lithium battery trackless rubber-tyred vehicles).

However, the lithium battery used on the explosion-proof vehicle has low capacitance and the explosion-proof vehicle is heavy, so that the lithium battery trackless rubber-tyred vehicle has short endurance mileage; at present, a charging pile is not allowed to be used under a mine, so that a vehicle needs to be charged just from the bottom of a well, once the vehicle is not powered underground, the vehicle can only wait for a rescue vehicle to be dragged and rescued, and therefore manpower and material resources are wasted, and the production efficiency is influenced. Moreover, because the lithium battery trackless rubber-tyred vehicle is frequently used, at present, basically all charging systems use common direct-current quick-charging piles, and according to the conditions of various mines, if a 380V three-phase power supply does not exist, a transformer needs to be additionally added, so that the operation cost is increased. Furthermore, in the charging process, in order to increase the output voltage, the rotation speed is often required to be increased by weak magnetism, but the weak magnetism can increase iron loss, increase the heating of the motor, cause over-temperature protection of the controller, and stop working, so that the control precision can be reduced by adopting the weak magnetism, and the control precision of the charging current and the estimation precision of the soc are influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the charging inversion system for the electric vehicle in the mine has the characteristics of low cost, high safety, good effect and the like.

The utility model provides a technical scheme that its technical problem adopted is: a charging inversion system for an electric vehicle under a mine comprises,

the six-phase motor is provided with two mutually independent three-phase windings which are respectively a first winding and a second winding; the first winding and the second winding are respectively connected with a control circuit; the second winding is connected with an inductor;

the control circuit is provided with a switch component, and the working state of the motor is controlled to be a power generation state or an electric state by controlling the on-off of the switch component;

the inverter circuit converts the input direct-current power into alternating-current power and outputs the alternating-current power to the first winding and the second winding;

the charging pile is used for converting alternating current power input by an external power grid into direct current power and outputting the direct current power to the inverter circuit;

a battery pack, said battery pack having a charged state and a discharged state;

a plurality of switch components for controlling the on-off of the circuit;

alternating current power output by an external power grid outputs direct current power to an inverter circuit after passing through a charging pile, a wiring terminal of the inverter circuit is connected with a winding of a six-phase motor through a control circuit, and switching of a normal driving state of a vehicle, a charged state of the vehicle and a charged state of other vehicles is carried out through on-off control of a switch component.

Further inject, the vehicle normal driving state under, first winding and second winding simultaneous working are at the electric state.

Further inject, vehicle self under by the charged state, first winding is got electric work at the electric state from outside electric wire netting, second winding work is at the power generation state, charges to the group battery.

Further inject, for other vehicle charged state under, the charging seat of other vehicles is connected to the switch part, the second winding is got the electricity work at electric state from the group battery, first winding work is at the generating state, charges for other vehicles.

The utility model has the advantages that the defects in the background technology are solved, the motor is changed from a common three-phase motor into a six-phase motor containing two mutually independent three phases, and the two controllers respectively control the corresponding three phases, so that the vehicle can be charged underground, and the endurance mileage is increased; the dependence on the direct current charging pile is reduced, the rectifying device is used as a simple charging pile, and the cost is reduced; the inductance is increased, the control mode is changed, and weak magnetic control is not used during charging.

Drawings

Fig. 1 is a schematic diagram of the circuit control of the present invention.

Detailed Description

The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, a charging inverter system for an electric vehicle under a mine comprises a six-phase motor, wherein the six-phase motor is provided with two mutually independent three-phase windings, namely a winding 1 and a winding 2; the winding 1 and the winding 2 are respectively connected with a control circuit; the charging pile is a simple charging pile and can be regarded as a rectifying circuit, the power output end of an external power grid is connected with the inverter circuit and the control circuit through the simple charging pile, and the normal running state of the vehicle, the self-charged state of the vehicle and the charging state of other vehicles are switched through the switch component.

As shown in fig. 1, when the vehicle runs normally, the switches 3, 4, 5, 6, 9, 12, 15, 18, 21 and 24 are closed, the other switches are opened, and the six-phase motor winding 1 and the six-phase motor winding 2 work simultaneously in an electric state to drive the vehicle to run;

when the vehicle is in a charged state, the switches 1, 2, 5, 6, 9, 12, 15, 16, 19 and 22 are closed, the other switches are opened, the winding 1 of the six-phase motor gets power from a power grid and works in an electric state, the winding 2 works in a power generation state, and power is generated to charge the battery pack;

when charging other vehicles, the switches 1 and 2 are externally connected with a charging seat of the vehicle to be charged, the switches 7, 10, 13, 18, 21 and 24 are closed, and the other switches are opened; the six-phase motor winding 2 works in an electric state by taking electricity from a battery, and the winding 1 works in a power generation state to generate electricity to charge other vehicles.

The simple charging pile in fig. 1 receives AC power of an external power grid as input, converts the AC power into DC power and outputs the DC power to the inverter circuit, and the inverter circuit converts the DC power from the simple charging pile into AC power and inputs the AC power to the control circuit to be connected to the winding 1 and the winding 2.

When the vehicle is charged, the voltage from the simple charging pile is lower than the charging direct-current voltage required by the battery pack due to different voltages in different countries or regions, so that the flux weakening acceleration is inevitably required, the winding 2 obtains a higher three-phase alternating-current voltage, and the battery pack with the higher voltage can be charged.

But the weak magnetic acceleration brings various disadvantages; and the inductor is added on the winding 2, so that the flux weakening acceleration is not needed to obtain higher voltage, and the electricity generated by the winding 2 is added with the voltage at the two ends of the inductor, so that the input alternating voltage at the end of the controller obtains higher voltage, and the battery pack is charged.

By the same principle, when other vehicles are charged, the low-voltage vehicle can charge the high-voltage vehicle.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. The utility model provides a charging inverter system for mine electric vehicle which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a plurality of switch components for controlling the on-off of the circuit;

2. The charging inversion system for the electric vehicle under the mine as claimed in claim 1, wherein: and under the normal running state of the vehicle, the first winding and the second winding work in an electric state simultaneously.

3. The charging inversion system for the electric vehicle under the mine as claimed in claim 1, wherein: under the charged state of the vehicle, the first winding takes electricity from an external power grid and works in an electric state, and the second winding works in a power generation state to charge the battery pack.

4. The charging inversion system for the electric vehicle under the mine as claimed in claim 1, wherein: and in the state of charging other vehicles, the switch component is connected with the charging seats of other vehicles, the second winding takes electricity from the battery pack and works in an electric state, and the first winding works in a power generation state to charge other vehicles.