KR20180003654A - Charging apparatus of plug-in hybrid electric ladder truck and its control method - Google Patents

Abstract

The present invention relates to an apparatus and method of charging a plug-in hybrid electric ladder truck, which generates a hydraulic pressure by charging an electronic switching system (ESS) with commercial power, generated electric power through a power take off (PTO) or regenerative electric power generated when a transfer car is moved downwards to drive actuators in a hydraulic line such that idling of a vehicular engine is reduced, thereby reducing unnecessary consumption of fuel, exhaust gas and noise. To this end, the apparatus of charging a plug-in hybrid electric ladder truck comprises: a generator connected to a power drawing device and generated when a vehicle is driven; a commercial power supply part connected to a commercial power supply and provided with power to be charged; a charger converting alternating current (AC) power outputted from the commercial power supply part into direct current (DC) power; an ESS storing a DC power supplied from the generator and the charger; an inverter converting a DC power output from the ESS into an AC power; an electric motor generating a rotational force by the AC power supplied from the inverter; and an auxiliary hydraulic pump generating a hydraulic pressure by a rotational force of the electric motor to be supplied to a main control valve.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a charging apparatus and a control method for a plug-in hybrid electric ladder,

The present invention relates to a hybrid ladder carriage charging device and a control method thereof, and more particularly, to a hybrid ladder carriage charging device and a control method thereof. More particularly, the present invention relates to a hybrid ladder carriage charging device and a control method thereof, And a hybrid ladder car charging device and control for reducing unnecessary fuel consumption, exhaust gas and noise by reducing the idling of the vehicle engine in the city center by charging the regenerative electric power generated by the ESS and driving the ladder motor by the charging power of the ESS ≪ / RTI >

Generally, a ladder car is provided with a transportation car installed on a boom bar extending and retracted, so that the transportation car can move freely between the high-rise buildings on the ground while raising and lowering the boom platform, or a cabin is installed at the upper end of the boom, So that it can be operated conveniently and safely at a high altitude.

An example of such a ladder car is shown in Fig. As shown in Fig. 1, the ladder 1 includes a boom frame 10 on which a multi-stage boom can be stretched and extended on a base frame of a vehicle, a transportation car 11 to ascend and descend by a multi-stage boom, A transport car winch unit 12 provided at the lower end of the lowermost boom so that one end of the wound wire can be connected to the transport car 11 to raise and lower the transport car 11, A boom winch angle adjusting cylinder 14 for adjusting the upward and downward angles of the boom, and a multi-stage boom winch unit 14 for forward and rearward movement of the boom, A plurality of outriggers 15 installed to extend and retract to support the vehicle, and a turntable capable of pivoting the boom frame 10 in the horizontal direction.

The outrigger 15, the boom angle regulating cylinder 14 and the like are driven by a hydraulic cylinder, the boom frame 10 is expanded and contracted by the operation of a boom winch unit 13 operated by hydraulic pressure, (11) is elevated and lowered by driving of a hydraulic car-operated car winch unit (12).

In this way, the main components related to the operation of the boom belt and the conveyance car of the ladder are driven by hydraulic pressure. The hydraulic pressure required for driving the boom belt and the conveyance car is such that a power take off (PTO) is installed in the transmission of the vehicle, So that the power take-off device operates the hydraulic pump to generate the hydraulic pressure.

However, when the outrigger 15 or the boom frame 10 is set to the working position once, it is not necessary to supply the hydraulic pressure. However, when the article is to be transported through the transportation car, The vehicle engine composed of a diesel engine must be operated since the vehicle must be supplied with the hydraulic pressure from the power take-off device during the lifting and lowering of the transportation car to transport the goods loaded on the transportation car.

However, during the operation of the vehicle engine, the fuel is continuously consumed and the exhaust gas is generated to pollute the atmosphere. In the case of working in the residential area in the city center, the engine noise may be generated, The use time of the consumable parts of the engine and the engine oil is increased, and the replacement cycle becomes faster.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a commercial power source for a vehicle in which a vehicle is supplied from a garage, a power generator for generating a PTO power generated during the running of the vehicle, Then, the regenerative power generated by regenerative braking during the descent of the vehicle is charged into an energy storage system (ESS), and the hydraulic pressure required for operating the ladder car is supplied by driving the hydraulic pump of the ladder with the charging power of the ESS The present invention provides a charging device and a control method of a hybrid ladder motor capable of operating an overall hydraulic system of a vanity car including a transportation car and increasing the use time of the battery even when the vehicle engine is turned off in an urban area The purpose of the invention is to solve the problem.

According to an aspect of the present invention, there is provided a hybrid ladder-

And a main control valve for supplying a hydraulic pressure supplied from the main hydraulic pump to a predetermined hydraulic system, wherein the main control valve includes a power take-off device that draws power from a vehicle engine, a main hydraulic pump that generates hydraulic pressure by driving the power take- In the charging device of the present invention,

A generator connected to the power take-off unit and generating power when traveling; A commercial power supply connected to a commercial power source in a home or a garage and supplied with power to be charged; A charger for converting AC power outputted from the commercial power supply unit into DC power; An ESS for storing the generator and the DC power supplied from the charger; An inverter for converting a DC power output from the ESS into an AC power; An electric motor for generating a rotational force by an AC power supplied from the inverter; And an auxiliary hydraulic pump that generates hydraulic pressure by the rotational force of the electric motor and supplies the generated hydraulic pressure to the main control valve.

The electric motor is configured to charge the ESS with regenerative electric power generated in the generator region by reverse rotation of the transporting car lift-up hydraulic motor and the auxiliary hydraulic pump provided in the transport car winch unit when the transport car descends.

The ESS includes a battery, a supercapacitor, and a BCMS for controlling charge / discharge by monitoring the charge / discharge state of the battery and the supercapacitor.

The battery is charged with the power supplied from the generator of the power take-off device, and the super capacitor is charged with the regenerative electric power generated by the electric motor in the generator area when the car is lowered.

The electric motor is connected to a torque / speed measuring unit for measuring the torque and the rotation speed of the electric motor and an electric motor generating voltage / current measuring unit for measuring voltage and current. The controller is connected to the torque / speed measuring unit and the motor generator voltage / And controls the electric motor to operate in a high efficiency section when the electric motor operates in the generator region.

A method for controlling a charging device for a hybrid ladder car according to the present invention is characterized in that,

a) detecting whether the vehicle is moving;

b) if it is detected in step a that the vehicle is moving, detecting whether charging is required in the battery;

c) charging the battery with PTO power generated by operating a generator connected to the power take-off device if it is determined in step b that the battery needs to be charged;

d) If it is determined that the battery is overcharged in the process of performing step c, it is determined that the battery is overcharged, and then the power generation operation of the generator is stopped and the process returns to step b.

Further, in the hybrid ladder car charging apparatus control method according to the present invention,

a) detecting whether the transporting car is descending by sensing a lifting operation of the transporting car;

b) charging the regenerative electric power generated by operating the electric motor connected to the output side of the ESS in the generator region to the supercapacitor of the ESS, if it is determined in the step a) that the transportation car is descending;

c) determining whether the voltage of the supercapacitor is higher than the voltage of the battery during the step b; if the voltage of the supercapacitor is higher than the voltage of the battery, charging the battery with the voltage of the supercapacitor;

If it is determined that the supercapacitor is overcharged during the step c, the supply of regenerative power supplied from the motor connected to the output side of the ESS to the supercapacitor is interrupted, The ESS output side motor is operated again with the electric motor and the step of returning to the step a for detecting the descent of the transportation car is performed.

In the present invention as described above, the hydraulic pressure required for operating the hydraulic system of the high-elevator ladder is generated by operating a hydraulic motor with the power stored in the ESS. When the ESS is charged, the commercial power is input from the car to charge the ladder, The electric power drawn by the power take-off device is used to charge the electric power generated by the PTO or the regenerative electric power generated when the transportation car is descending, thereby operating the actuators connected to the hydraulic system of the ladder car, So that unnecessary fuel consumption of the ladder vehicle can be prevented.

In addition, the exhaust gas or noise generated in the vehicle engine during the lifting and lowering of the transportation car is not environmentally friendly, and the operation time of the vehicle engine is reduced, thereby increasing the replacement cycle of consumable parts and engine oil of the vehicle engine.

Especially, in urban areas, by driving the ladder with the power mainly charged to the ESS, the noise of the city center can be reduced.

1 is a hydraulic line diagram of a conventional ladder car,
Fig. 2 is a configuration diagram of the present invention,
3 is a detailed configuration diagram of an ESS according to the present invention,
FIG. 4 is a flowchart illustrating a method for controlling a charging device during vehicle movement of a hybrid ladder vehicle according to the present invention,
FIG. 5 is a flow chart for explaining a charging device control method during a transportation car descent of a hybrid ladder car according to the present invention;

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments are provided so that those skilled in the art can understand the present invention more fully and will not be described in detail with respect to known functions and configurations that may be unnecessarily obscured by the gist of the present invention .

2 shows a configuration diagram of the present invention.

2, a vehicle engine 21 mainly composed of a diesel engine is provided with a power take off (PTO) 22 so that rotational force can be drawn from the vehicle engine 21.

The main hydraulic pump 23 generates hydraulic pressure by using the rotational force drawn by the main hydraulic pump 23 coupled to the power take-off device 22. The main hydraulic pump 23 sucks the hydraulic oil from the hydraulic tank 90, The discharged hydraulic fluid passes through the main control valve 24 to actuate various actuators and then returns to the hydraulic tank 90. [ For example, the actuators connected to the main control valve 24 include a swing angle adjusting cylinder 25, an outrigger stretching cylinder 26, a boom stretch hydraulic motor 27, a carrying car lift hydraulic motor 28, and the like , And the hydraulic pressure can be supplied to the actuator to be driven through the control of the main control valve (24).

In addition to the hydraulic line L1 for supplying the hydraulic pressure generated by the main hydraulic pump 23 connected to the power take-off device 22, the input side of the main control valve 24 is connected to a hydraulic power source And a hydraulic line L2 for supplying and supplying the hydraulic fluid are connected in parallel.

That is, an electric motor 62 is connected to the output side of the ESS 30 via an inverter 61, and an auxiliary hydraulic pump 63 is connected to the electric motor 62. The auxiliary hydraulic pump 63 receives the rotational force from the electric motor 62 operated by the charging power supplied from the ESS 30 and sucks the hydraulic oil from the hydraulic tank 90 and discharges the hydraulic oil to the main control valve 24, The discharged hydraulic fluid is passed through the main control valve 24 to actuate various actuators and return to the hydraulic tank 90.

Therefore, the hydraulic system actuators of the ladder truck are selectively operated to receive the hydraulic pressure generated by the operation of the power take-off device 22 or the ESS 30 according to the operation of the user. In particular, When the hydraulic system actuators of the ladder truck are driven by using the power source and the charging power of the ESS 30 is judged to be insufficient for driving the actuators, the main control valve 24 is adjusted so that the hydraulic line L1 of the PTO 22 side So that the actuators can be operated.

Next, a description will be given of a configuration in which the ESS 30 is charged with electric power while the vehicle is moving, the vehicle is moving, or the carriage is descending, and the hydraulic pressure is supplied to the elevator car hydraulic motor 28.

The ESS 30 according to the present invention is a device in which electric power is stored in a storage device in advance and is supplied when power is needed to improve power use efficiency. (31), a super capacitor (32), and a BCMS (33). The battery 31 is a means for storing electric energy for driving the actuators. As described later, the supercapacitor 32 is generated when an electric motor 62 operating as a generator region is operated as a generator when the transportation car descends, Stored in the battery 31 may damage the battery 31. Therefore, the regenerative electric power generated by the motor 62 in the generator region is stored first, and then the electric potential difference with the battery 31 is used The BCMS 33 is a means capable of rapidly charging and discharging as a means for stably supplying electric power to the battery 31 when the voltage of the battery 31 is higher than the voltage of the battery 31. The BCMS 33 is a means for charging and discharging the battery 31 and the supercapacitor 32 It is a means to control the charging and discharging so that the battery can perform the maximum performance by monitoring the state.

Referring to FIG. 2 again, a configuration for charging a commercial power supply to the ESS 30 in a home or a garage will be described.

A commercial power supply unit 41 is connected to the input side of the ESS 30 via a charger 42. The commercial power supply unit 41 is a device that is connected to a commercial power source provided in a home or a garage in a plug-in manner and is supplied with commercial power. The charger 42 converts the AC power supplied from the commercial power supply unit 41 DC power source and supplies it to the ESS 30. The power supplied from the commercial power supply unit 41 is stored in the battery 31 in a storage medium provided in the ESS 30. This is because the power supplied from the commercial power supply unit 41 is stably supplied at a constant level without a large fluctuation.

Next, a description will be given of a configuration for charging the ESS 30 with generated electric power by the self-contained PTO during vehicle movement.

A separate generator 50 is connected to the power take-off device 22 to generate electricity to be charged to the ESS 30 during vehicle movement, and the PTO power generated in the generator 50 is supplied to the ESS 30 And is directly connected to the battery 31 for storage. This is because the generator 50 connected to the PTO 22 is provided with a regulator (not shown) so that the generated voltage can be kept constant, so that the voltage generated by the generator 50 is stably supplied at a constant level.

Finally, a configuration for charging the ESS 30 with the regenerative electric power generated by the carrier during the descent will be described.

An electric motor 62 is connected to the output side of the ESS 30 via an inverter 61 for raising and lowering the transportation car with the charging power of the ESS 30. [ The inverter 61 converts the DC voltage output from the ESS 30 into an AC voltage of a predetermined level and supplies the AC voltage to the electric motor 62. The inverter 61 also supplies AC So that the voltage can be supplied by adjusting the frequency.

The electric motor 62 is an alternating-current (AC) motor that generates a rotational force by an AC power supplied from the inverter 61. In the present invention, when the vehicle is descending, the electric motor 62 is operated in the generator region, And power generation means for charging the ESS 30 after power generation is also provided, so that energy efficiency can be enhanced.

An auxiliary hydraulic pump 63 is connected to the rotary shaft of the electric motor 62 to generate hydraulic pressure from the auxiliary hydraulic pump 63 in accordance with the rotation of the electric motor 62 and supply the generated hydraulic pressure to the main control valve 24, So that actuators connected to the system can be driven.

On the other hand, one end of the wire is wound around the winch of the car-winch unit 12, and a car is fixed to the other end of the wire. The winch causes the hydraulic pressure supplied from the main control valve 24 to pass through the car- When the winch is driven by the operation of the elevator hydraulic motor 28 and the wire is wound or unwound on the winch, the conveying car is moved up or down .

Particularly, a controller 80 for controlling charging and discharging operations of the ESS 30 is provided, and the electric motor 62 is provided with a torque (torque) and a speed of the electric motor 62, which are transmitted to the controller 80 A speed measuring unit 71 and an electric motor voltage / current measuring unit 72 for measuring the voltage and current output from the electric motor 62 when the electric motor 62 operates in the generator region and transmitting the measured voltage and current to the controller 80, Respectively.

The controller 80 receives the measurement signals from the torque / speed measuring unit 71 and the motor generator voltage / current measuring unit 72 and outputs the measured signals to the electric motor 62 when the electric motor 62 operates in the generator region. That is, in a section where the power generation efficiency is high. The output of the normal motor 62 is represented by the product of the number of revolutions and the torque, and the input of the motor is represented by the current and the voltage. The controller 80 calculates the efficiency of the input and the output, Respectively.

The controller 80 controls the hydraulic pressure of the hydraulic motor 28 by controlling the release pressure of the hydraulic motor 28 when the hydraulic motor 28 is lowered. In order to stop the hydraulic motor 28, 62 is gradually decreased, the speed of the motor 62 is instantaneously increased due to inertia of the rotor 62. At this time, the carrier car loaded with the load freely falls and develops. That is, the frequency of the motor 62 is adjusted so that the motor 62 can rotate at a speed higher than the speed commanded by the controller 80 so that the motor 62 rotates faster than the commanded speed at the time of descending the car. And operates in the generator region.

The ESS 30 is charged with the regenerative electric power generated by operating the electric motor 62 in the generator region when the transportation car descends.

In addition, an ESS voltage / current measuring unit 35 for measuring the voltage and current output from the ESS 30 is connected to the ESS 30, and the voltage / current signal of the measured ESS 30 is supplied to the controller 80 . Accordingly, the controller 80 controls the ESS 30 to stop the charging operation when the voltage and current signals measured by the ESS voltage / current measuring unit 35 are received and charged to a predetermined charging voltage or higher.

Hereinafter, a method for controlling the hybrid ladder carriage charging apparatus during vehicle movement according to the present invention will be described with reference to FIG.

First, the controller 80 detects whether or not the ladder carriage is moving. If it is detected that the ladder carriage is moving, the controller 80 analyzes the voltage signal and the current signal of the ESS 30 received through the ESS voltage / 30) is required to be charged.

When it is determined that the ESS 30 is not charged with sufficient voltage, the controller 80 operates the generator 50 connected to the PTO 22 to generate electric power, And charges the ESS 30.

At this time, the controller 80 measures the voltage and current of the ESS 30 through the ESS voltage / current measuring unit 35 in the process of charging the ESS 30 with the PTO power generated by the generator 50, If it is determined that the battery is overcharged, the charging current is cut off and the battery is controlled so as not to overcharge.

Next, the control method during the descent of the transportation car of the hybrid ladder car charging apparatus according to the present invention will be described with reference to Fig.

First, the controller 80 extends the boom band of the ladder to the position of the elevation, controls the elevating / lowering of the elevating car along the elongated boom, detects whether the elevating car is descending during the transportation of the cargo loaded on the elevating car, When it is detected that the car is being lowered, the ESS 30 analyzes the voltage signal and the current signal of the ESS 30 received through the ESS voltage / current measuring unit 35 to determine whether the ESS 30 requires charging.

When it is determined that the ESS 30 is not charged with a sufficient voltage, the controller 80 operates the electric motor 62 in the generator region to generate electric power when the vehicle is descending, 30), particularly the supercapacitor 32 provided in the ESS 30.

At this time, in the BCMS 33 provided in the ESS 30, the voltage of the supercapacitor 32 and the voltage of the battery 31 are measured and transmitted to the controller 80. Thus, in the controller 80, the supercapacitor 32 And compares the voltage of the battery 31 with the voltage of the battery 31. When it is determined that the voltage of the supercapacitor 32 is higher than the voltage of the battery 31, the power of the supercapacitor 32 is charged into the battery 31, When the voltage of the capacitor 32 is lower than the voltage of the battery 31, the regenerative power is charged to the supercapacitor 32 while the charging operation to the battery 31 is blocked.

During charging the regenerative electric power generated by operating the electric motor 62 in the generator region during the descent of the transportation car, the battery 31 is charged with the charge voltage of the supercapacitor 32 through the ESS voltage / current measurement unit 35 If it is determined that the super capacitor 32 is overcharged, the regenerative power generated by the motor 62 is prevented from being charged in the ESS 30, and the electric motor 62 is charged in the generator region The motor is operated again.

As described above, the controller 80 draws and fixes the boom bar to the destination of the building so that the cargo can be transported using the car, then operates the electric motor 62 as a generator while the car is descending, (30).

As described above, according to the present invention, when the ladder vehicle is in the waiting state, it is supplied with the commercial power supplied from the garage, the PTO generation power generated by the power drawn from the PTO when the vehicle is moving, and the regenerative power generated when the transportation car is descending. As a result, the transport vehicle can be lifted and lowered even when the vehicle engine is turned off by elevating the transport vehicle with the hydraulic pressure generated by using the charging power of the ESS 30 after charging the ESS 30, By actuating the actuators, idling of the vehicle engine is prevented, environmental pollution, noise, shortening of consumable parts and engine oil replacement cycles caused by idling of the vehicle engine do not occur.

In addition, since the ladder vehicle is supplied with power to drive the carriage car in the standby state, during transportation, or during the descending time of the carriage car, no additional charging time is required and driving of the carriage car It does not affect.

If necessary, the main control valve 23 can be adjusted by a manual operation to generate hydraulic pressure by the power drawn from the power take-off device 22 to drive the transportation car.

21 - vehicle engine, 22 - power take-off,
23 - main hydraulic pump, 24 - main control valve,
25 - Boom Angle Adjustable Cylinder, 26 - Out Trigger Extension Cylinder,
27 - boom bar extension new hydraulic motor, 28 - lift car lift hydraulic motor,
30 - ESS, 35 - Voltage / current measuring part,
41 - commercial power supply, 42 - charger,
50 - Generator, 61 - Inverter,
62 - electric motor, 63 - auxiliary hydraulic pump,
71 - Torque / speed measuring section, 72 - Motor voltage / current measuring section,
80 - Controller, L1: L2 - Hydraulic line.

Claims (7)

A main hydraulic pump for generating hydraulic pressure by driving the power take-off device; a main control valve for supplying hydraulic pressure supplied from the main hydraulic pump to a predetermined hydraulic system hydraulic actuator provided in the ladder; The hybrid ladder car charging apparatus according to claim 1,
A generator connected to the power take-off unit and generating power when traveling; A commercial power supply connected to a commercial power supply and supplied with power to be charged; A charger for converting AC power outputted from the commercial power supply unit into DC power; An ESS for storing the generator and the DC power supplied from the charger; An inverter for converting a DC power output from the ESS into an AC power; An electric motor for generating a rotational force by an AC power supplied from the inverter; And an auxiliary hydraulic pump for generating hydraulic pressure by the rotational force of the electric motor and supplying the generated hydraulic pressure to the main control valve.
The electric power steering apparatus according to claim 1, wherein the electric motor is configured to charge the ESS with regenerative electric power generated in the generator region by reverse rotation of the transporting car lift-up hydraulic motor and the auxiliary hydraulic pump provided in the transport car winch unit when the transport car descends, Of the hybrid ladder carriage.
The apparatus of claim 1 or 2, wherein the ESS comprises a battery, a supercapacitor, and a BCMS for controlling charging and discharging by monitoring a charging and discharging state of the battery and the supercapacitor.
4. The hybrid ladder car charging device according to claim 3, wherein the battery is charged with the power supplied from the generator of the power take-off device, and the supercapacitor is charged with the regenerative electric power generated by the motor in the generator region when the car is lowered. .
The motor / generator according to claim 1 or 2, wherein the electric motor is connected to a torque / speed measuring unit for measuring a torque and a rotation speed of the electric motor and a motor generator voltage / current measuring unit for measuring voltage and current, Wherein the control unit is configured to receive the measurement signals of the speed measuring unit and the motor generator voltage / current measuring unit so that the motor operates in a section where the efficiency of the motor is high when the motor operates in the generator region.
The controller,
a) detecting whether the vehicle is moving;
b) if it is detected in step a that the vehicle is moving, detecting whether charging is required in the battery;
c) charging the battery with PTO power generated by operating a generator connected to the power take-off device if it is determined in step b that the battery needs to be charged;
d) determining whether the battery is overcharged in the process of performing step c), and if it is determined that the battery is overcharged, stopping the power generation operation of the generator and returning to step b.
The controller,
a) detecting whether the transporting car is descending by sensing a lifting operation of the transporting car;
b) charging the regenerative electric power generated by operating the electric motor connected to the output side of the ESS in the generator region to the supercapacitor of the ESS, if it is determined in the step a) that the transportation car is descending;
c) determining whether the voltage of the supercapacitor is higher than the voltage of the battery during the step b; if the voltage of the supercapacitor is higher than the voltage of the battery, charging the battery with the voltage of the supercapacitor;
If it is determined that the supercapacitor is overcharged during the step c, the supply of regenerative power supplied from the motor connected to the output side of the ESS to the supercapacitor is interrupted, The ESS output-side motor is operated again with the electric motor and the step of returning to the step a for detecting the descent of the transportation car is performed.

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