CN111740488A - Dual-power supply device of electric scraper - Google Patents
Dual-power supply device of electric scraper Download PDFInfo
- Publication number
- CN111740488A CN111740488A CN201910226561.6A CN201910226561A CN111740488A CN 111740488 A CN111740488 A CN 111740488A CN 201910226561 A CN201910226561 A CN 201910226561A CN 111740488 A CN111740488 A CN 111740488A
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- power supply
- storage battery
- electric
- battery pack
- bidirectional
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a dual-power supply device of an electric scraper, which can enable the electric scraper to still rely on the energy storage of a storage battery pack to perform short-time operation, especially rapid transition, under the condition of no power supply of a power supply cable. The device comprises the following parts: the system comprises an external cable power supply interface, a cable power supply switch, a motor power switch, a motor, a storage battery pack, a Vehicle Control Unit (VCU), a three-phase uncontrolled rectifying device, a three-phase inverter and a bidirectional DC-DC converter.
Description
1. Field of the invention
The invention belongs to the technical field of electric scooptram equipment, and particularly relates to a dual-power supply device of an electric scooptram.
2. Background of the invention
At present, in the mine scraping operation, the power of the scraper mainly comes from a diesel engine and an electric motor. The diesel carry scraper has the advantages that: the range of motion is wide, the engine power is strong, and the technology is mature; disadvantages of diesel scrapers: the cost of the oil is continuously increased, the noise is high, the waste gas pollution is caused, the oil is easy to cause environmental pollution due to leakage, and the electrification transformation is needed when an automatic control system is installed; because part of the electric energy needs to be provided by a diesel engine driving generator, the energy is lost when being converted. The electric scooptram has the advantages that: the device is clean and noiseless, the electrification transformation is not needed when an automatic control system is installed, and the daily maintenance is convenient; disadvantages of electric scooptrams: the length of the power supply cable limits the operation range, and the cable connection is inconvenient during transition;
3. summary of the invention
The invention provides a dual-power supply device of an electric scraper, which can enable the electric scraper to still rely on the energy storage of a storage battery pack to perform short-time operation, especially rapid transition, under the condition of no power supply of a power supply cable.
The manufacturing scheme is as follows: the electric scraper is provided with a storage battery pack, a bidirectional DC-DC converter, a three-phase inverter, a three-phase uncontrolled rectifying device and a related control device.
The operation process is as follows: when the electric scraper normally works under the condition of cable power supply, the electric energy transmitted by the cable charges the storage battery after passing through the three-phase uncontrolled rectifying device and the bidirectional DC-DC converter until the storage battery is fully charged, and when the storage battery is fully charged, the storage battery is stopped to be charged through the whole vehicle controller; when the electric scraper cannot obtain electric energy from the cable due to insufficient length of the power supply cable or other reasons, a power supply circuit of the storage battery pack is connected through a control system, the storage battery pack is connected into a three-phase inverter after being converted by a bidirectional DC-DC converter and is converted into three-phase high-voltage alternating current, and the scraper is driven to normally operate (mainly comprising advancing, retreating, arm lifting, arm lowering, charging, discharging, lighting, communication and the like);
the invention provides a dual-power supply device of an electric scraper, which can reduce the dependence on cable power supply during operation of a mine scraper, improve the transition efficiency of the scraper and prevent the occurrence of an event that the scraper cannot normally operate due to sudden power failure.
4. Description of the drawings
(1) Fig. 1 is a diagram showing an overall system configuration.
5. Detailed description of the preferred embodiments
(1) The structure of the circuit will be described with reference to FIG. 1
External cable power supply interface: a three-phase three-wire system (a U wire, a V wire and a W wire) is adopted, three wires U, V, W are respectively connected with three-phase alternating current, and then the three-phase alternating current is connected with a cable power supply switch of the scraper.
Cable power supply switch: after being connected with the power supply interface of the external cable, the U wire is connected with a FUSE FUSE9, the V wire is connected with a FUSE FUSE10, and the W wire is connected with a FUSE FUSE 11; the FUSE9 connection switch SW1, the FUSE10 connection switch SW2, and the FUSE11 connection switch SW3, SW1, SW2, and SW3 are connected to the three-phase uncontrolled rectifying device.
Three-phase uncontrolled rectifying device: the three-phase inverter is connected behind the three-phase uncontrolled rectifying device; the three-phase inverter then outputs three-phase alternating current, which is transmitted through the a-line, the b-line and the c-line.
Switching on and off a motor: line a is connected with FUSE1, and then is connected with a switch SW 4; line b is connected with FUSE2, and then is connected with a switch SW 5; the c line is connected with FUSE3, and then connected with switches SW6, SW4, SW5 and SW6 to be connected with the motor.
Battery pack: the positive pole of the storage battery pack is connected with the positive pole of one end of the bidirectional DC-DC converter, and the negative pole of the storage battery pack is connected with the negative pole of one end of the bidirectional DC-DC converter.
Bidirectional DC-DC converter: the positive pole and the negative pole at the other end of the bidirectional DC-DC converter are drawn out of two lines, the line drawn out of the positive pole at the other end is connected with FUSE4, and the line drawn out of the negative pole at the other end is connected with FUSE 5; FUSE4 is connected to the positive pole of the input end of the three-phase inverter, and FUSE5 is connected to the negative pole of the input end of the three-phase inverter.
(2) The working mode of the dual power supply device will be explained with reference to FIG. 1
When the electric forklift is connected with a cable power supply, the cable power supply is inverted through the three-phase uncontrolled rectifying device and the three-phase inverter, then a motor in the electric forklift is driven, meanwhile, the bidirectional DC-DC converter is connected to the output end of the three-phase uncontrolled rectifying device, and the bidirectional DC-DC converter is used for charging the storage battery pack.
When the accelerator pedal or the brake pedal acts, a signal sent by the accelerator pedal or the brake pedal is transmitted to the vehicle control unit through a CAN bus, and a control signal is transmitted to the three-phase inverter after the signal is processed by the Vehicle Control Unit (VCU) so as to control the rotating speed of the motor.
The Vehicle Control Unit (VCU) controls the flow direction of power by controlling signals of a switch tube of the bidirectional DC-DC converter, a charging circuit of the storage battery pack is connected so as to charge the storage battery pack, and when the storage battery pack is full, the VCU sends signals through the CAN bus to control the bidirectional DC-DC converter so that the storage battery pack is disconnected from the three-phase uncontrolled rectifying device.
When the electric scraper is in a transition state, the electric scraper cannot obtain electric energy from the cable due to insufficient length of the power supply cable or other reasons, the storage battery starts to supply power to the motor controller after passing through the bidirectional DC-DC converter, the electric energy stored in the storage battery is used for supplying power to the motor, and when the residual electric quantity of the storage battery is lower than a threshold value set by the vehicle controller, the power supply switch of the inverter is automatically cut off.
(3) Supplementary notes
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (3)
1. The utility model provides an electric scooptram dual supply unit which characterized in that: the device is provided with an external cable power supply interface, a cable power supply switch, a motor power switch, a motor, a storage battery pack, a Vehicle Control Unit (VCU), a three-phase uncontrolled rectifying device, a three-phase inverter and a bidirectional DC-DC converter.
2. The dual power supply device of the electric scooptram according to claim 1, characterized in that: when the electric scraper is powered by a cable, the electric scraper drives a motor after passing through a three-phase uncontrolled rectifying device and a three-phase inverter, when an accelerator or a brake pedal acts, a signal sent by the electric scraper is transmitted to a Vehicle Control Unit (VCU) through a CAN bus, and a control signal is transmitted to the three-phase inverter after the signal is processed by the Vehicle Control Unit (VCU), so that the rotating speed of the motor CAN be controlled, a bidirectional DC-DC converter is connected to two output ends of the three-phase uncontrolled rectifying device, signals of two switching tubes of the bidirectional DC-DC converter are controlled through a vehicle control system (VCU), a storage battery charging circuit is connected, so that a storage battery pack is charged, and the bidirectional DC-DC converter is controlled through the Vehicle Control Unit (VCU) until the storage battery pack is fully charged, and the charging process of the storage battery pack is stopped; when the external cable is disconnected or the external cable is pulled out to lose external electric power, a Vehicle Control Unit (VCU) sends a signal to control the bidirectional DC-DC converter, the electric energy stored by the storage battery pack temporarily supplies power to the motor, and when the residual electric quantity of the storage battery is lower than a threshold value set by the Vehicle Control Unit (VCU), a storage battery pack power supply switch is automatically cut off.
3. The dual power supply device of the electric scooptram according to claim 1, characterized in that: the external cable power supply interface is connected with a cable power supply switch, the cable power supply switch is connected with a three-phase uncontrolled rectifying device, the three-phase uncontrolled rectifying device is connected with a three-phase inverter, the three-phase inverter is connected with a motor power switch, the motor power switch is connected with a motor, the high-power storage battery pack is connected with a bidirectional DC-DC converter, and the bidirectional DC-DC converter is connected with the three-phase inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226561.6A CN111740488A (en) | 2019-03-25 | 2019-03-25 | Dual-power supply device of electric scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226561.6A CN111740488A (en) | 2019-03-25 | 2019-03-25 | Dual-power supply device of electric scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111740488A true CN111740488A (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910226561.6A Pending CN111740488A (en) | 2019-03-25 | 2019-03-25 | Dual-power supply device of electric scraper |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204333993U (en) * | 2014-10-15 | 2015-05-13 | 上海恒熠机电科技有限公司 | Crane electrical source of power device |
| CN105668415A (en) * | 2016-04-01 | 2016-06-15 | 上海振华重工(集团)股份有限公司 | Power supply system and power supply switching method of container gantry crane |
| CN206765825U (en) * | 2017-02-10 | 2017-12-19 | 石家庄汉卓能源科技有限公司 | A kind of general Bidirectional charging-discharging device of portable new-energy automobile |
| CN107650690A (en) * | 2017-09-20 | 2018-02-02 | 株洲时代电子技术有限公司 | A kind of railway engineering mechanical mixture power operated control method |
| CN109245278A (en) * | 2018-09-25 | 2019-01-18 | 恒天九五重工有限公司 | A kind of AC-DC double power supply intersection electric-control system for stake machine |
| CN211930325U (en) * | 2019-03-25 | 2020-11-13 | 北京宸控科技有限公司 | Dual-power supply device of electric scraper |
-
2019
- 2019-03-25 CN CN201910226561.6A patent/CN111740488A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204333993U (en) * | 2014-10-15 | 2015-05-13 | 上海恒熠机电科技有限公司 | Crane electrical source of power device |
| CN105668415A (en) * | 2016-04-01 | 2016-06-15 | 上海振华重工(集团)股份有限公司 | Power supply system and power supply switching method of container gantry crane |
| CN206765825U (en) * | 2017-02-10 | 2017-12-19 | 石家庄汉卓能源科技有限公司 | A kind of general Bidirectional charging-discharging device of portable new-energy automobile |
| CN107650690A (en) * | 2017-09-20 | 2018-02-02 | 株洲时代电子技术有限公司 | A kind of railway engineering mechanical mixture power operated control method |
| CN109245278A (en) * | 2018-09-25 | 2019-01-18 | 恒天九五重工有限公司 | A kind of AC-DC double power supply intersection electric-control system for stake machine |
| CN211930325U (en) * | 2019-03-25 | 2020-11-13 | 北京宸控科技有限公司 | Dual-power supply device of electric scraper |
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