KR20160041191A - Eco-friendly electric cultivator using HBSR Dual Motor - Google Patents

Abstract

The present invention relates to an eco-friendly electric cultivator using a hybrid switched reluctance (HBSR) dual motor and, more particularly, to an eco-friendly electric cultivator using an HBSR dual motor, the eco-friendly electric cultivator being capable of replacing operations performed by existing power cultivators by applying a HBSR dual motor having high torque, efficiency and output instead of a brushless DC (BLDC) motor that has been used in conventional motor related machinery. In an agricultural cultivator including a frame(10) to one side of which a running unit(20) is coupled, and to other side of which an operating unit(30) is coupled, a driving power generating unit which is coupled between the running unit(20) and the operating unit(30), and a handle(50) which has an adjusting lever(51) and is coupled to the running unit(20). The driving power generating unit includes a power supply unit and a driving motor which adopts an HBSR motor. The driving motor is a dual motor consisting of a first driving motor and a second driving motor. The first and second driving motors include first and second driving shafts, and first and second driving gears connected to the first and second driving shafts. A main driving gear(430) which is engaged with the first and second driving gears is positioned between the first and second driving gears by a main driving shaft. The main driving shaft is connected to the running unit(20) and the operating unit(30) by a power transmission unit. The power supply unit includes a BMS(Battery Management System), and a cable which connects a battery pack(451) and a driving motor. The BMS transmits respective charging information of plural sub-packs which form the battery pack to an ECU such that the ECU determines charging orders and charging amounts of the sub-packs. The ECU charges electricity in the battery pack(451) by stopping driving of the second driving motor based on the charging information of the BMS, thereby enabling the second driving motor to generate electricity according to driving of the first driving motor.

Description

(Eco-friendly electric cultivator using HBSR dual motor) using an HBSR dual motor (Eco-friendly electric cultivator using HBSR dual motor)

The present invention has been accomplished by the development of an environmentally friendly electric power management system using the HBSR dual motor (task No. 112038-2) of the Ministry of Agriculture, Forestry and Fisheries, which is the main body.

More particularly, the present invention relates to an environmentally friendly power management system using an HBSR dual motor (hereinafter referred to as an HBSR dual motor), and more particularly, to an environmentally friendly power management system using a high- SR) dual motor to replace the work performed by the existing power manager. The present invention relates to an environmentally friendly power management system using an HBSR dual motor.

Due to the strengthening of international environmental regulations such as the Climate Change Convention due to the acceleration of global warming, there is increasing pressure on the utilization of environmentally friendly energy and the utilization of new and renewable energy, and the depletion of fossil fuels is expected to become real soon As electric vehicles and hybrid vehicles have been continuously developed, the advent of new battery technology products, the application of induction motors and vector control controllers have had a great influence on bicycles, scooters, golf cars and wheelchairs, The product market was formed.

Although it is expected that it will play a big role in the agricultural machinery market if it is improved to suit the environment of agriculture, there are few cases of application for agriculture, and electric transport trucks replacing the power trucks are being partially supplied, Most of the transporters are wagon-type, and their output is low. Therefore, it is difficult to apply to Korean terrain, which is mostly sloped.

Therefore, it is difficult to apply to a management device in which a lot of load work such as a gulgote and a clayey is mainly used. When a large capacity motor and a battery are used, it becomes difficult to show the main function of the manager due to increase of the total load and structure.

Patent Document 1: Korean Patent Registration No. 10-1221485

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an eco-friendly electric power management system using an HBSR dual motor according to the present invention, in which a high power, high torque, (Hybrid SR) Dual Motor and High Performance BMS (Battery Management System).

In particular, by replacing the power transmission of a motor with a dual gear system, it is remarkably simplified compared to the existing belt system, and when the self-power generation system is applied, it is inconvenient to charge the battery frequently by applying the battery pack including the BMS There is a purpose to resolve.

In order to solve the above-mentioned problems, an anti-vibration motor using an HBSR (Hybrid SR Switched Reluctance) dual motor has a running part coupled to one side of the frame and a working part coupled to the other side A driving force generating unit coupled between the traveling unit and the work unit, and a handle having an adjusting lever coupled to the traveling unit, wherein the driving force generating unit comprises a driving motor employing an HBSR motor and a power supply unit The first driving motor and the second driving motor are located in a dual position, and the first and second driving motors are respectively driven by first and second driving shafts and first and second driving shafts connected to the first and second driving shafts, respectively, Wherein a main drive gear engaged with each of the first and second drive gears is positioned between the first and second drive gears by a main drive shaft, Wherein the power supply unit comprises a battery management system (BMS) and a cable connecting the battery pack and the drive motor, wherein the BMS is connected to a plurality of subpacks constituting the battery pack, So that the ECU determines the charging sequence and charge amount of the sub-pack, wherein the ECU stops the driving of the second driving motor on the basis of the charging information of the BMS, And the second drive motor is driven to generate electricity to charge the battery pack.

Also, the BMS may include a sensing unit for measuring a cell voltage and a cell current of a plurality of battery subpacks; A main control unit for measuring charge information of the plurality of battery sub-packs using the cell voltages and cell currents of the plurality of battery sub-packs and sending the battery sub-pack control signals to the ECU and the cell balancing unit to control charge and discharge; And a cell balancing unit that performs cell balancing of the battery sub-packs based on the battery sub-pack control signal, wherein the main control unit sets the maximum value of the cell balancing discharge capacities of the plurality of battery sub- And comparing the difference value of the battery balancing discharge capacity of the battery pack sub-pack with the reference value to determine the battery sub-pack having the difference value larger than the reference value as the short battery sub-pack.

The eco-friendly electric power management system using the HBSR dual motor according to the present invention having the above characteristics has the following effects.

1. By adopting HBSR motor, it is possible to provide a power system that can increase the output more than twice as compared with existing brushless commutator (BLDC) ,

2. By adopting HBSR motor as Dual, it is possible to apply the self-power generation system, which can dramatically increase the energy efficiency compared to the existing engine type power management system. In comparison with the conventional one, So that the output can be easily increased,

3. By applying the battery pack including BMS, it is possible to drastically reduce the electricity consumption, so that the performance of the controller for the load operation is increased and the characteristic of the manager working in the space where the charge is not smooth is at least 4 hours As a result, the inconvenience of frequently charging the battery can be solved.

Fig. 1 is a side view of a conventional power-
2 is a side view of an environmentally friendly power management system using an HBSR dual motor according to the present invention
FIG. 3 is a perspective view of the driving force generating unit of the environmentally friendly power management system using the HBSR dual motor according to the present invention.
FIG. 4 is a plan view showing the entire driving force generating unit of the environmentally friendly power management system using the HBSR dual motor according to the present invention.
5 is a side view of the driving force generating unit of the environment-friendly electric power steering apparatus using the HBSR dual motor according to the present invention
6 is a schematic view of a peripheral device of a battery pack, a BMS, and a BMS of an environmentally friendly power management system using an HBSR dual motor according to the present invention.

The term used in the present invention is a general term that is widely used at present. However, in some cases, there is a term selected arbitrarily by the applicant. In this case, the term used in the present invention It is necessary to understand the meaning.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

Referring to FIGS. 1 and 2, an environmentally friendly power management system using a Hybrid SR Switched Reluctance (HBSR) dual motor employs a high torque, high efficiency and high output HBSR motor instead of a conventional BLDC motor used in a motor- In addition, when the workload is small, only one motor is operated and the remaining motors are operated using the power of a motor that is operated. And the motor and the battery pack 451 are located at a position where the conventional engine 40 is located.

The eco-friendly electric power management system according to the present invention is characterized in that the driving unit 20 is coupled to one side of the frame 10 and the working unit 30 is coupled to the other side of the frame 10, and between the driving unit 20 and the working unit 30 And a handle 50 having an adjusting lever 51 is coupled to the driving unit 20. The basic frame of the general agricultural manager may be adopted as it is.

Here, the driving force generating unit 40 includes a driving motor 410 employing an HBSR motor and a power supply unit 450.

The first driving motor 411 and the second driving motor 413 are positioned in the bracket 100 and the first and second driving motors 411 and 411 are connected to the driving motor 410, 1,2 driving shafts 4111 and 4131, and first and second driving gears 4113 and 4133 connected to the first and second driving shafts.

Between the first and second drive gears 4113 and 4133, the main drive gear 430 is positioned by the main drive shaft 431 to engage with the first and second drive gears.

3, the brackets 100 include first and second drive shaft insertion holes 110 and 120 and a main drive shaft insertion hole 110 so that the first and second drive shafts 4111 and 4131 and the main drive shaft 431 can be inserted, The first and second driving gears 4113 and 4133 and the main driving gear 430 are positioned inside the bracket 100 to protect the gear train from the external environment.

The first driving motor 411 and the second driving motor 413 are respectively connected to the battery pack 451 by cables and are driven by receiving power from the battery pack.

The main drive gear 430 has a diameter larger than that of the first and second drive gears 4113 and 4133 so that the main drive shaft is connected to the drive unit 20 and the work unit 30 In connection, it can transmit a large force.

At this time, one end of the timing belt 45 is wound around a drive timing pulley 47 formed to be exposed to the outside of the main drive shaft, and the other end of the timing belt is driven by a driven pulley 46 ). A wheel sprocket wheel (not shown) is coupled to the traveling transmission shaft to be coupled to a traveling sprocket wheel provided on the traveling wheel 21 of the traveling unit 20 as a chain.

In addition, although not shown, an output transmission having functions such as driving force and forward / backward movement required for traveling can be further formed inside the bracket 100. [

The power supply unit 450 includes a BMS (Battery Management System) and a cable connecting the battery pack 451 and the drive motor 410.

When the second driving motor 413 is stopped, the ECU 7 to be powered on will generate power to the battery pack 451 by the second driving motor 413 in accordance with the driving of the first driving motor 411 Has a self-generating system for charging.

That is, the second driving motor 413 is connected to the battery pack 451 and is configured to charge the battery pack 451 with the electric power generated by the second driving motor 413.

Here, whether or not the second driving motor 413 is driven may be torque information or rotation speed (rpm) of the first driving motor 411. In the case where the number of revolutions is equal to the number of revolutions, the revolving speed may be measured and the revolutions rpm may be compared with the set reference value to control the second driving motor 413.

That is, when the number of revolutions of the first drive motor 411 is less than 2000 rpm, the second drive motor 413 is set to the power generation mode, and the electricity obtained by the power generation is charged into the battery pack 451 through the BMS. The second drive motor 413 switches the second drive motor 413 to the drive mode when the rotation speed rpm of the first drive motor 411 is 2000 rpm or more. And is driven by energy. On the other hand, the ECU 7 to be controlled is configured to control the driving of the first and second driving motors, and electrically stops the driving of the first and second driving motors according to the operation of the brakes (not shown). That is, the power supply of the battery pack that supplies power to the first and second driving motors is cut off.

In addition, the BMS (Battery Management System) 1 allows the electric energy to be charged and controlled by the ECU to be charged from a battery pack having a small charge amount and to detect and replace a short battery, Can be maximized. That is, the BMS 1 transmits charging information of each of the plurality of sub-packs 451-1 to 451-6 constituting the battery pack 451 to the ECU 7, The charging sequence and the charging amount of the batteries 451-1 to 451-6 are determined and a short battery is detected so that the user can replace the battery.

A current sensor 3, a cooling fan 4, an inrush current prevention unit 5, a main switch 6, an ECU (Electric Controller Unit) 7, an inverter 8, And the motor generator 9 are interlocked with each other.

The battery pack 451 includes a plurality of subpacks 451-1, 451-2, 451-3, 451-4, 451-5, and 451-6 connected in series with each other, Terminals 452 and 453 and a safety switch 455 connected between sub-pack 451-3 and sub-pack 451-4.

The plurality of subpacks are illustrated as six, and the first subpack 451-1, the second subpack 451-2, the third subpack 451-3, the fourth subpack 451-3, -4), the fifth sub-pack 451-5 and the sixth sub-pack 451-6. In the figure, the first subpack 451-1 to the sixth subpack 451-6 each include eight rechargeable battery subpacks connected in series, so that the battery 2 is divided into a total of 48 battery subpacks , But the present invention is not limited thereto. Here, each sub-pack is merely a representation of a plurality of battery sub-packs as one group, and the battery 2 is configured such that 48 battery sub-packs are directly connected without distinguishing between the first sub-pack and the sixth sub-pack It is possible.

The output terminals 452 and 453 are connected to the inverter 8 and the motor generator 9 of the manager to supply electric energy to the drive motor 410.

The safety switch 455 is connected between the third sub-pack 451-3 and the fourth sub-pack 451-4. When the battery is replaced or the battery is operated, And can be turned on and off manually.

In the embodiment of the present invention, a safety switch is connected between the third sub-pack 451-3 and the fourth sub-pack 451-4, but the present invention is not limited thereto. On the other hand, although not shown, a fuse can be connected in series to the safety switch. The fuse prevents overcurrent from being transferred to the battery due to a short circuit of the battery. That is, when an overcurrent occurs, the fuse is disconnected to prevent the overcurrent from being transmitted to the battery.

The current sensor 3 measures the amount of output current of the battery and outputs it to the sensing unit 210 of the BMS. Specifically, the current sensor 3 may be a Hall current transformer (Hall CT) that measures a current using a Hall element and outputs an analog current signal corresponding to the measured current. The current sensor 3 transmits information on the measured battery current to the BMS.

The cooling fan 4 cools the heat that may be generated by the charge / discharge of the battery based on the control signal of the BMS, thereby preventing deterioration of the battery due to temperature rise and reduction of charge / discharge efficiency.

The inrush current prevention unit 5 is located between the battery and the inverter 8 and prevents an inrush current from being applied to the inverter 8 from the battery to prevent the inverter 8 from being damaged by the inrush current. To this end, the inrush current prevention part 5 includes a precharge resistor, a precharge relay, and a main relay. Here, the inrush current is firstly applied to the inverter 8 after the precharge relay is turned on first, and then the precharge relay is turned off and the main relay is turned on. 8).

The main switch 6 turns on and off the battery 2 based on the control signal of the BMS 1 when an abnormal phenomenon such as overvoltage, overcurrent, or high temperature occurs.

The BMS 1 includes a sensing unit 210, a main control unit 220, an internal power supply unit 230, a sub-pack balancing unit 240, a storage unit 250, A protection circuit unit 270, a power-on reset unit 280,

The sensing unit 210 is electrically connected to each of a plurality of battery sub-packs, that is, sub-pack cells constituting the battery pack 451. The sensing unit 210 measures the total pack current and the total pack voltage of the battery pack 451 and the cell voltage, the cell current, the cell temperature, and the ambient temperature of each of the plurality of battery subpacks, .

The main control unit 220 controls the total pack current and total pack voltage of the battery pack 451 transmitted from the sensing unit 210 and the cell voltage of each of the plurality of battery subpacks, A state of charge (hereinafter referred to as "charge information"), a state of health (hereinafter referred to as "SOH") of the battery pack 451 based on the corresponding digital data, do. Also, the main control unit 220 obtains an OCV (Open Circuit Voltage) of each of the plurality of battery sub-pack cells using the cell voltage and the cell current of each of the plurality of battery sub-packs, The charging information of each pack is measured and the short battery sub-pack among the plurality of battery sub-packs is detected using the difference information of the charging information between the plurality of battery sub-packs to transmit information on the short battery sub-pack to the ECU 7 The cell balancing unit 240 performs cell balancing of the sub-packs so that the degraded battery sub-packs can be replaced due to the short circuit. In addition, based on the control signal of the ECU 7, the electric energy to be charged from the second drive motor 413 can be stored from a subpack having a small charge amount.

Here, the short battery subpack refers to a battery subpack in which the voltage is reduced by the electrical contact between the positive electrode and the negative electrode inside, and particularly when the active material of the positive electrode or the negative electrode breaks the insulating separator interposed between the positive electrode and the negative electrode, An instantaneous short circuit may occur in which the voltage of the pack is instantaneously reduced.

The internal power supply unit 230 is a device that supplies power to the BMS 1 using an auxiliary battery.

The cell balancing unit 240 balances the state of charge of each battery sub-pack. That is, the cell balancing unit 240 discharges the battery sub-pack having a relatively high charge state based on the sub-pack charge information measured through the main control unit 220, and charges the battery sub-pack having a relatively low charge state, While keeping the cell balancing, the electric energy to be charged from the second driving motor 413 is guided to be charged first in the battery subpack having the smallest charged amount.

When the power of the BMS 1 is turned off, the storage unit 250 stores data such as current charging information, SOH, and the like. Also, the storage unit 250 stores the cell balancing discharge capacity (CB_n; n is a natural number) measured by the cell balancing discharge capacity measuring unit 223. Here, the storage unit 250 may be an electrically erasable and erasable non-volatile storage device such as an EEPROM.

The communication unit 260 performs communication with the ECU.

The protection circuit unit 270 is a circuit for protecting the BMS 1 from external shocks, overcurrents, and undervoltage using firmware.

The power-on reset unit 280 resets the entire system when the power of the BMS 1 is turned on.

The external interface 290 is a device for connecting the peripheral devices of the BMS 1 such as the cooling fan 4 and the main switch 6 to the main control unit 220. In the embodiment of the present invention, only the cooling fan 4 and the main switch 6 are shown, but the present invention is not limited thereto.

The ECU 7 determines the degree of torque based on information such as a break, a running speed and a workload, and controls the output of the motor generator 9 to match the torque information. That is, the ECU 7 controls the switching of the inverter 8 to control the output of the motor generator 9 to match the torque information. Such control may be the number of revolutions (rpm) as mentioned above.

The inverter 8 causes the battery pack to be charged or discharged based on the control signal of the ECU 7. [

The motor generator 9 drives the first drive motor 411 and the second drive motor 413 based on the torque information transmitted from the ECU 7 using the electric energy of the battery pack.

As described above, the BMS (Battery Management System) includes a sensing unit 210 for measuring a cell voltage and a cell current of a plurality of battery sub-packs, a plurality of battery sub- A main control unit 220 for measuring a charge information of the pack and sending a battery sub-pack control signal to the ECU 7 and the cell balancing unit so as to control charge and discharge, and a battery control unit 220 for controlling the battery sub- Wherein the main control unit controls a difference between a maximum value of the cell balancing discharge capacities of the plurality of battery sub-packs and a difference value of the cell balancing discharge capacities of the plurality of battery sub- And determines the battery sub-pack having the difference value larger than the reference value among the plurality of battery sub-packs as a short battery sub-pack.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Various modifications and variations will be possible without departing from the spirit of the invention. Therefore, the scope of the present invention should be construed as being covered by the scope of the appended claims, and technical scope within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

1: BMS 3: current sensor 4: cooling fan
5: inrush current prevention part 6: main switch 7: ECU
8: Inverter 9: Motor generator
100: Bracket
10: frame 20: running part 30: working part
40: driving force generating unit 50: handle
411: first drive motor 4111: first drive shaft 4113: first drive gear
413: second drive motor 4131: second drive shaft 4133: second drive gear
430: main drive gear 431: main drive shaft
450: Power supply unit 451: Battery pack

Claims (2)

A driving unit 20 is coupled to one side of the frame 10 and a working unit 30 is coupled to the other side of the frame 10. A driving force generating unit 40 is coupled between the driving unit 20 and the working unit 30, And a handle (50) having an adjusting lever (51) is coupled to the traveling portion (20)
The driving force generation unit 40 includes a driving motor 410 and a power supply unit 450 employing a Hybrid SR Switched Reluctance (HBSR)
In the driving motor 410, the first driving motor 411 and the second driving motor 413 are positioned in a dual manner,
The first and second driving motors 411 are respectively composed of first and second driving shafts 4111 and 4131 and first and second driving gears 4113 and 4133 connected to the first and second driving shafts,
Between the first and second drive gears 4113 and 4133, a main drive gear 430, which is engaged with the first and second drive gears, is positioned by a main drive shaft 431,
The main drive shaft is connected to the drive unit (20) and the work unit (30) by a power transmission means,
The power supply unit 450 includes a BMS (Battery Management System) 1 and a cable connecting the battery pack 451 and the drive motor 410,
The BMS 1 transmits charging information of each of the plurality of sub-packs 451-1 to 451-6 constituting the battery pack 451 to the ECU 7 so that the ECU 7 can supply the sub- 451 - 1 to 451 - 6,
The ECU 7 stops the driving of the second driving motor 413 based on the charging information of the BMS 1 so that the second driving motor 413 is driven in accordance with the driving of the first driving motor 411 And the electric power is charged in the battery pack (451).
The method according to claim 1,
The BMS (1) includes a sensing unit 210 for measuring a cell voltage and a cell current of a plurality of battery subpacks;
A battery sub-pack control signal for controlling charge / discharge of the plurality of battery sub-packs by measuring charge information of the plurality of battery sub-packs using the cell voltages and cell currents of the plurality of battery sub- A control unit 220; And
And a cell balancing unit 240 for balancing the battery subpacks by the battery subpack control signal,
Wherein the main control unit compares a maximum value among the cell balancing discharging capacities of each of the plurality of battery sub-packs and a difference value of the cell balancing discharging capacity of each of the plurality of battery sub-packs with a reference value, The battery sub-pack having a difference value larger than the reference value is determined as a short battery sub-pack.

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