CN109802461B - Multi-mode output power supply circuit for engineering machinery, power supply control system and control method thereof - Google Patents
Multi-mode output power supply circuit for engineering machinery, power supply control system and control method thereof Download PDFInfo
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Abstract
The invention provides a multi-mode output power supply circuit for engineering machinery, a power supply control system and a control method thereof. The multimode output power supply circuit and the power supply control system thereof have the functions of state monitoring and fault diagnosis, and ensure the stable operation of the system. The DC-DC conversion unit can be turned off and turned on through the touch screen setting interface, the intelligent energy-saving characteristic is fully exerted, and the stability of the whole electric system is ensured. The multimode output power supply circuit and the power supply control system thereof utilize the system energy storage element to effectively absorb the signal fluctuation of the system circuit and increase the system stability.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a multi-mode output power supply circuit for engineering machinery, a power supply control system and a control method thereof.
Background
In the field of engineering machinery, people often assemble the storage batteries in a serial or parallel connection mode to provide a 12V or 24V power supply for the whole machine. Along with the continuous improvement of the intelligent level, the demands of people are more and more extensive, the single power supply system often cannot meet the demands of users, and the research of the multi-mode output power supply circuit and the power supply control system thereof is urgent facing the phenomenon.
The road and non-road equipment power supply systems of the engineering machinery are both 12V or 24V power supply voltages, and the 12V or 24V power supply systems exist for each equipment independently, namely when the equipment A power supply system is 24V, a 12V power supply loop is not arranged in the electric system, and vice versa. The professional causes that 12V and 24V power supply voltage can not be realized simultaneously in the working of engineering machinery, and the normal operation of electric elements in the engineering machinery is affected. Some engineering machinery adopts a mode of adding power supply equipment to realize that 12V and 24V power supply voltage exist simultaneously, so that the power supply equipment of the engineering machinery is added, equipment fault hidden danger is increased, a complicated power supply control mode is adopted, and the power supply mode is not easy to uniformly coordinate.
Disclosure of Invention
The multi-mode output power supply circuit, the power supply control system and the control method for the engineering machinery effectively solve the problem of single power supply mode of the whole electric system, realize the purpose of simultaneously installing electric elements with various power supply requirements by one device, and meet the special functional requirements of different customers and product devices.
The method specifically comprises the following steps: comprising the following steps: the power supply comprises a storage battery, a power supply main switch, a storage battery relay and a DC-DC conversion unit;
the positive electrode of the storage battery is connected with the first end of the power supply main switch;
the negative electrode of the storage battery is grounded;
the second end of the power supply main switch is connected with the first connecting end of the storage battery relay;
the second connecting end of the storage battery relay is grounded;
the third connecting end of the storage battery relay is respectively connected with the second end of the DC-DC conversion unit and the engineering machinery load connecting end;
the fourth connecting end of the storage battery relay is connected with the key switch or the controller;
the first end of the DC-DC conversion unit is a load connection end of the engineering machinery after voltage conversion.
The DC-DC conversion unit includes: the voltage regulator comprises a voltage boosting circuit, a voltage reducing circuit, a voltage stabilizing circuit and a voltage regulating circuit.
The invention provides a multimode output power supply control system for engineering machinery, which comprises: a multi-mode output power supply circuit, a touch screen, and a controller;
the third end of the storage battery relay in the multi-mode output power supply circuit, the second end of the DC-DC conversion unit, the first end of the controller, the first end of the touch screen and the load connecting end of the engineering machinery are connected together;
the fourth end of the touch screen is grounded;
the third signal end of the controller, the third signal end of the touch screen, the third signal end of the DC-DC conversion unit, the first end of the resistor R1 and the first end of the resistor R2 are connected together;
the controller is connected with the touch screen through a first signal end, the touch screen is connected with the touch screen through a second signal end, and the touch screen is connected with the touch screen through a second signal end;
the second end of the touch screen, the second end of the controller and the fifth end of the DC-DC conversion unit are respectively grounded.
Preferably, the load connection end of the engineering machinery after voltage conversion is provided with a 12v power supply end, a 24v power supply end, a self-defined power supply end and a grounding end.
Preferably, the third end of the storage battery relay is connected with the second end of the DC-DC conversion unit through a protective tube;
the third end of the storage battery relay is connected with the first end of the controller through a protective tube;
the third end of the storage battery relay is connected with the first end of the touch screen through a protective tube.
Preferably, the touch screen, the controller and the DC-DC conversion unit are connected through a CAN bus and realize data communication.
The invention provides a multi-mode output power supply control method for engineering machinery, which comprises the following steps:
closing a power supply main switch;
screwing the key switch clockwise from an OFF position to an ACC ON position, and closing the storage battery relay;
the power supply end of the engineering machinery is electrified to complete the power supply of the whole electric system;
after the storage battery relay is closed, the DC-DC conversion unit enters a working state;
in the non-control mode, the DC-DC conversion unit realizes voltage stabilizing output according to the self voltage reducing or boosting characteristic, namely dual-mode power supply output, and the circuit defaults to a voltage boosting or voltage reducing function.
From the above technical scheme, the invention has the following advantages:
the invention adds the DC-DC conversion unit in the power supply system of the whole machine, when the electric system of the whole machine is electrified, the DC-DC conversion unit utilizes the internal energy storage element to convert the input voltage, namely the system voltage, into effective fixed voltage output so as to ensure the normal operation of the electric elements with different power supply requirements. And a 24v and 12v dual-mode and other multi-mode power supply voltage signal output is realized by utilizing a single power supply of engineering machinery such as a bulldozer and the like. The dual-mode output power supply circuit defaults to a function of boosting or reducing voltage, can not be changed, and is used as special power supply, such as application of a vehicle-mounted 12v charging interface of engineering machinery. The multimode output power supply circuit and the power supply control system thereof have multiple functions of boosting, reducing and stabilizing voltage, and are suitable for the requirements of more clients and special elements. The multimode output power supply circuit and the power supply control system default to have three paths of power supplies, namely 12v and 24v respectively, and the voltage is customized. The custom voltage is 5v or other voltage value. The multimode output power supply circuit and the power supply control system thereof have the functions of state monitoring and fault diagnosis, and ensure the stable operation of the system. The DC-DC conversion unit can be turned off and turned on through the touch screen setting interface, the intelligent energy-saving characteristic is fully exerted, and the stability of the whole electric system is ensured. The touch screen multimode output voltage control interface can be used for opening and closing each path of voltage, wherein the self-defined voltage can be adjusted and set. The multimode output power supply circuit and the power supply control system thereof utilize the system energy storage element to effectively absorb the signal fluctuation of the system circuit and increase the system stability.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-mode output power supply circuit for a work machine;
FIG. 2 is a schematic diagram of a multi-mode output power control system for a work machine.
Detailed Description
The invention provides a multimode output power supply circuit for engineering machinery, as shown in figure 1, comprising: a battery 1, a power main switch 2, a battery relay 3, and a DC-DC conversion unit 4;
the anode of the storage battery 1 is connected with the first end of the power supply main switch 2; the negative electrode of the storage battery 1 is grounded; the second end of the power supply main switch 2 is connected with the first connecting end of the storage battery relay 3; the second connection end of the storage battery relay 3 is grounded; the third connecting end of the storage battery relay 3 is respectively connected with the second end of the DC-DC conversion unit 4 and the engineering machinery load connecting end; the fourth connecting end of the storage battery relay 3 is connected with a key switch or a controller; the first end of the DC-DC conversion unit 4 is a load connection end of the engineering machinery after voltage conversion.
Further, the DC-DC conversion unit 4 includes: the voltage regulator comprises a voltage boosting circuit, a voltage reducing circuit, a voltage stabilizing circuit and a voltage regulating circuit.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The invention also provides a multi-mode output power supply control system for engineering machinery, as shown in fig. 2, comprising: a multimode output power supply circuit 7, a touch screen 5, and a controller 6;
the third end of the storage battery relay 3, the second end of the DC-DC conversion unit 4, the first end of the controller 6, the first end of the touch screen 5 and the engineering machinery load connecting end in the multi-mode output power supply circuit 7 are connected together; the fourth end of the touch screen 5 is grounded; the third signal end of the controller 6, the third signal end of the touch screen 5, the third signal end of the DC-DC conversion unit 4, the first end of the resistor R1 and the first end of the resistor R2 are connected together; the controller 6 is connected with the fourth signal end, the touch screen 5 is connected with the fourth signal end, the DC-DC conversion unit 4 is connected with the second end of the resistor R1 and the second end of the resistor R2; the second end of the touch screen 5, the second end of the controller 6 and the fifth end of the DC-DC conversion unit 4 are respectively grounded.
DC-DC conversion unit: the DC-DC converter is also called a voltage converter that converts an input voltage and then effectively outputs a fixed voltage. The self-excited oscillation circuit converts the input direct current into alternating current, the voltage is changed by the transformer and then the alternating current is converted into direct current for output, or the voltage doubling rectifying circuit converts the alternating current into high-voltage direct current for output. DC/DC converter classification: step-up DC/DC converter, step-down DC/DC converter, and step-up DC/DC converter. CAN bus: CAN is an abbreviation for controller area network, which is an ISO internationally standardized serial communication protocol. The controller 6 may be an ECU of the construction machine.
And (3) intelligent control: the automatic control technology can actively drive the intelligent machine to realize the control target under the condition of no human intervention. Storage battery relay: refers to an automatic control device for jumping change of output quantity when the input quantity reaches a certain value. The battery relay related to the invention is a normally open type battery relay. The construction machine according to the present invention may be a bulldozer, an excavator, or the like.
The invention mainly utilizes the characteristics of boosting and reducing voltage of the DC-DC conversion unit to obtain the system voltage different from the original power supply system, thereby ensuring the normal operation of the circuit load element. Under the non-starting state of engineering machinery equipment such as bulldozers and the like, the DC-DC conversion unit mainly utilizes the electric energy of the storage battery to work, and the system voltage is boosted or reduced to a special-demand power supply voltage value. After engineering machinery equipment such as bulldozers and the like is started, the DC-DC conversion unit works like other electrical system load elements by utilizing electric energy generated by the generator, and the system voltage is boosted or reduced to a power supply voltage with special requirements so as to ensure the normal work of the circuit load elements.
The load connecting end of the engineering machinery after voltage conversion is provided with a 12v power supply end, a 24v power supply end, a self-defined power supply end and a grounding end. The third end of the storage battery relay 3 is connected with the second end of the DC-DC conversion unit 4 through a safety tube 8; the third end of the storage battery relay 3 is connected with the first end of the controller 6 through a safety tube 8; the third end of the storage battery relay 3 is connected with the first end of the touch screen 5 through a protective tube 8. The touch screen 5, the controller 6 and the DC-DC conversion unit 4 are connected via a CAN bus and realize data communication.
In the management interface of the touch screen multimode output power supply system, the switching on and switching off of the DC-DC conversion unit and the independent switching on and switching off of the voltage increasing and decreasing function of the DC-DC conversion unit are realized through key operation. In an actual control system, if a serious fault or data abnormality occurs in the DC-DC conversion unit, the controller forcibly closes the output function of the DC-DC conversion unit and sends specific fault information data to the touch screen, and the touch screen is displayed on a current interface to prompt an operator to conduct fault checking and maintenance.
The techniques described herein may be implemented in hardware, software, firmware, or any combination thereof. The various features described are modules, units, or components that may be implemented together in an integrated logic device or separately as discrete but interoperable logic devices or other hardware devices. In some cases, various features of the electronic circuit may be implemented as one or more integrated circuit devices, such as an integrated circuit chip or chipset.
If implemented in hardware, the present invention relates to an apparatus, e.g., as a processor or an integrated circuit device, such as an integrated circuit chip or chip set. Alternatively or additionally, if implemented in software or firmware, the techniques may implement a data storage medium readable at least in part by a computer comprising instructions that, when executed, cause a processor to perform one or more of the methods described above. For example, a computer-readable data storage medium may store instructions such as those executed by a processor.
The invention provides a multi-mode output power supply circuit and a power supply control system thereof for engineering machinery such as bulldozers, breaks through the single power supply mode of the engineering machinery such as bulldozers, and creates the coexistence of a two-way voltage system and a multi-way voltage system.
1, a 24v and 12v dual-mode and other multi-mode power supply voltage signal output is realized by utilizing a single power supply of engineering machinery such as a bulldozer and the like.
2, the structure is simple, the installation is convenient, and the products at the high end and the low end can be applied. The low-end product adopts a dual-mode output power supply circuit, intelligent control elements such as a controller are not involved, and the output voltage value of the DC-DC conversion unit is directly defaulted; the high-end product uses the multimode output power supply circuit and the power supply control system thereof, so that the selection is diversified and the system is more stable.
The dual-mode output power supply circuit defaults to a function of boosting or reducing voltage, can not be changed, and is used as special power supply, such as application of a vehicle-mounted 12v charging interface of engineering machinery.
The 4-multimode output power supply circuit and the power supply control system thereof have multiple functions of boosting, reducing and stabilizing voltage, and are suitable for the requirements of more clients and special elements.
The 5-multimode output power supply circuit and the power supply control system thereof default to have three paths of power supplies, namely 12v and 24v respectively, and the voltage is customized. The custom voltage is 5v or other voltage value.
And 6, the multimode output power supply circuit and the power supply control system thereof have the functions of state monitoring and fault diagnosis, and ensure the stable operation of the system.
And 7, the DC-DC conversion unit can be turned off and turned on through a touch screen setting interface, so that the intelligent energy-saving characteristic is fully exerted, and the stability of an electric system of the whole machine is ensured.
The multi-mode output voltage control interface of the 8 touch screen can be used for opening and closing each path of voltage, wherein the self-defined voltage can be adjusted and set.
And 9, the multi-mode output power supply circuit and the power supply control system thereof utilize the system energy storage element to effectively absorb the signal fluctuation of the system circuit and increase the system stability.
10. And the intelligent control level is improved.
The invention also provides a multi-mode output power supply control method for the engineering machinery, which comprises the following steps:
closing a power supply main switch;
screwing the key switch clockwise from an OFF position to an ACC ON position, and closing the storage battery relay;
the power supply end of the engineering machinery is electrified to complete the power supply of the whole electric system;
after the storage battery relay is closed, the DC-DC conversion unit enters a working state;
in the non-control mode, the DC-DC conversion unit realizes voltage stabilizing output according to the self voltage reducing or boosting characteristic, namely dual-mode power supply output, and the circuit defaults to a voltage boosting or voltage reducing function.
The non-control mode is that the DC-DC conversion unit performs boosting or reducing operation based on a system preset mode under the condition that the DC-DC conversion unit is not controlled by the engineering machinery ECU or the whole vehicle controller.
It should be further noted that the method further includes:
after the whole system is electrified, the step-up, step-down and voltage stabilizing signal instructions of the DC-DC conversion unit are sent through the touch screen, and the control and the monitoring of the DC-DC conversion unit are completed in the multi-mode output power supply system management interface of the touch screen;
in a management interface of a touch screen multimode output power supply system, starting a DC-DC conversion unit, wherein a controller receives a DC-DC conversion unit starting instruction sent by the touch screen, controls the DC-DC conversion unit to enter a working state, sends an online heartbeat instruction to the controller after the DC-DC conversion unit enters the working state, feeds back the online state of the DC-DC conversion unit to the touch screen after the controller detects the heartbeat instruction of the DC-DC conversion unit, and a working state indicator lamp of the DC-DC conversion unit is lightened in the interface of the touch screen;
when the system voltage is set to 12v after the DC-DC conversion unit enters a working state, starting a 12v step-down function in a multi-mode output power supply system management interface of the touch screen, after a controller receives a 12v step-down signal sent by the touch screen, controlling the DC-DC conversion unit to enter the working state, enabling the DC-DC conversion unit to output the 12v step-down signal through an internal circuit of the step-down unit, supplying power for 12v power supply equipment in the conversion circuit, feeding back the 12v step-down function successful start state information to the controller by the DC-DC conversion unit, and enabling a 12v working state indicator lamp of the DC-DC conversion unit to be lighted when the controller feeds back the information to the touch screen, wherein the color is green;
the system voltage is set to 24v, a 24v boosting function is started in a multi-mode output power supply system management interface of the touch screen, after the controller receives a 24v boosting signal sent by the touch screen, the controller controls a DC-DC conversion unit boosting unit to enter a working state, the DC-DC conversion unit realizes 24v boosting signal output through an internal circuit of the boosting unit and supplies power to 24v power supply equipment in the conversion circuit, the DC-DC conversion unit feeds back information of the successfully started state of the 24v boosting function to the controller, the controller feeds back the information to the touch screen, and a working state indicator lamp of the 24v of the DC-DC conversion unit is lightened, so that the color is green.
The DC-DC conversion unit from 24v to 12v is arranged in the whole electric system, and 12v electric elements are connected in the output loop of the DC-DC conversion unit 12v, so that the normal operation of the DC-DC conversion unit can be ensured, and the stability of the circuit is effectively ensured by utilizing the internal energy storage element of the DC-DC and the filtering function of the internal energy storage element.
It should be further noted that the method further includes:
after the DC-DC conversion unit enters a working state, the controller compares the detected system voltage value with the power supply voltage value of the DC-DC conversion unit, the detected system voltage value and the power supply voltage value of the DC-DC conversion unit are consistent, the detected system voltage value and the power supply voltage value are used as regulated power supply output, the regulated voltage unit of the DC-DC conversion unit enters the working state, the DC-DC conversion unit realizes regulated voltage signal output through an internal circuit of the regulated voltage unit, and the regulated voltage output value of the DC-DC conversion unit is consistent with the system voltage value; after the voltage stabilizing function is started, the starting state of the DC-DC conversion unit is fed back to the controller, the controller is subjected to information verification, the verification result is fed back to the touch screen, and after the touch screen receives a voltage stabilizing function output instruction sent by the controller, the DC- DC conversion unit 12v or 24v working state indicator lamp is lighted, and the color is yellow.
When the power supply voltage is set to be 5v, a user-defined voltage setting function is started in a multi-mode output power supply system management interface of the touch screen, user-defined voltage value setting is carried out according to an actual demand voltage value of 5v, after setting is completed, the touch screen sends setting information to the DC-DC conversion unit, the DC-DC conversion unit adjusts the user-defined voltage output value to be 5v for output through the self voltage regulating unit according to setting requirements, the controller detects the user-defined voltage specific output value of the DC-DC conversion unit and compares the user-defined voltage output value with the setting value of the touch screen, the controller is consistent with the setting value of the touch screen, the controller does not carry out adjustment processing, and if the difference between the user-defined voltage output value and the setting value is large, the controller automatically carries out instruction fine adjustment on the DC-DC conversion unit, the user-defined voltage value is stabilized near the setting value of the touch screen, and automatic correction of the user-defined voltage is achieved.
1 the multimode output power supply circuit provided by the invention realizes multipath voltage output by utilizing a single power supply.
The multi-mode output power supply control system provided by the invention realizes multi-path output voltage control, state monitoring and fault diagnosis by using the controller, the touch screen and the DC-DC conversion unit.
The multimode output power supply control system provided by the invention can realize the on/off of the total function and the on/off of the specific function and the adjustment of the self-defined voltage value.
4 the intelligent control system can realize the multi-mode power supply output through the external control switch, and the invention is only one embodiment, but not the only embodiment.
The power supply circuit provided by the invention is a simple dual-mode output power supply circuit in practice, and in the system, the special step-up and step-down processing of the system can be realized without the operation and control of a controller and a touch screen.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A multi-mode output power supply control method for engineering machinery is characterized in that the method adopts a multi-mode output power supply control system for engineering machinery, and the system comprises: a multimode output power supply circuit (7), a touch screen (5) and a controller (6);
the multimode output power supply circuit (7) includes: a storage battery (1), a power supply main switch (2), a storage battery relay (3) and a DC-DC conversion unit (4);
the anode of the storage battery (1) is connected with the first end of the power supply main switch (2);
the negative electrode of the storage battery (1) is grounded;
the second end of the power supply main switch (2) is connected with the first connecting end of the storage battery relay (3);
the second connecting end of the storage battery relay (3) is grounded;
the third connecting end of the storage battery relay (3) is respectively connected with the second end of the DC-DC conversion unit (4) and the engineering machinery load connecting end;
the fourth connecting end of the storage battery relay (3) is connected with a key switch or a controller;
the first end of the DC-DC conversion unit (4) is a load connecting end of the engineering machinery after voltage conversion;
the third end of the storage battery relay (3), the second end of the DC-DC conversion unit (4), the first end of the controller (6), the first end of the touch screen (5) and the load connecting end of the engineering machinery in the multi-mode output power supply circuit (7) are connected together;
the third signal end of the controller (6), the third signal end of the touch screen (5), the third signal end of the DC-DC conversion unit (4), the first end of the resistor R1 and the first end of the resistor R2 are connected together;
the controller (6) is connected with the fourth signal end, the touch screen (5) is connected with the fourth signal end, the DC-DC conversion unit (4) is connected with the second end of the resistor R1 and the second end of the resistor R2;
the second end of the touch screen (5), the second end of the controller (6) and the fifth end of the DC-DC conversion unit (4) are respectively grounded;
the load connecting end of the engineering machinery after voltage conversion is provided with a 12v power supply end, a 24v power supply end, a self-defined power supply end and a grounding end;
the method comprises the following steps:
closing a power supply main switch;
screwing the key switch clockwise from an OFF position to an ACC ON position, and closing the storage battery relay;
the power supply end of the engineering machinery is electrified to complete the power supply of the whole electric system;
after the storage battery relay is closed, the DC-DC conversion unit enters a working state;
in a non-control mode, the DC-DC conversion unit realizes voltage stabilizing output according to self voltage reducing or boosting characteristics, namely dual-mode power supply output, and the circuit defaults to a voltage boosting or voltage reducing function;
the method further comprises the steps of:
after the whole system is electrified, the step-up, step-down and voltage stabilizing signal instructions of the DC-DC conversion unit are sent through the touch screen, and the control and the monitoring of the DC-DC conversion unit are completed in the multi-mode output power supply system management interface of the touch screen;
in a management interface of a touch screen multimode output power supply system, starting a DC-DC conversion unit, wherein a controller receives a DC-DC conversion unit starting instruction sent by the touch screen, controls the DC-DC conversion unit to enter a working state, sends an online heartbeat instruction to the controller after the DC-DC conversion unit enters the working state, feeds back the online state of the DC-DC conversion unit to the touch screen after the controller detects the heartbeat instruction of the DC-DC conversion unit, and a working state indicator lamp of the DC-DC conversion unit is lightened in the interface of the touch screen;
when the system voltage is set to 12v after the DC-DC conversion unit enters a working state, starting a 12v step-down function in a multi-mode output power supply system management interface of the touch screen, after a controller receives a 12v step-down signal sent by the touch screen, controlling the DC-DC conversion unit to enter the working state, enabling the DC-DC conversion unit to output the 12v step-down signal through an internal circuit of the step-down unit, supplying power for 12v power supply equipment in the conversion circuit, feeding back the 12v step-down function successful start state information to the controller by the DC-DC conversion unit, and enabling a 12v working state indicator lamp of the DC-DC conversion unit to be lighted when the controller feeds back the information to the touch screen, wherein the color is green;
the system voltage is set to 24v, a 24v boosting function is started in a multi-mode output power supply system management interface of the touch screen, after a controller receives a 24v boosting signal sent by the touch screen, the controller controls a DC-DC conversion unit boosting unit to enter a working state, the DC-DC conversion unit realizes 24v boosting signal output through an internal circuit of the boosting unit and supplies power to 24v power supply equipment in the conversion circuit, the DC-DC conversion unit feeds back the information of the successfully started state of the 24v boosting function to the controller, the controller feeds back the information to the touch screen, and a 24v working state indicator lamp of the DC-DC conversion unit is lightened, so that the color is green;
the method further comprises the steps of:
after the DC-DC conversion unit enters a working state, the controller compares the detected system voltage value with the power supply voltage value of the DC-DC conversion unit, the detected system voltage value and the power supply voltage value of the DC-DC conversion unit are consistent, the detected system voltage value and the power supply voltage value are used as regulated power supply output, the regulated voltage unit of the DC-DC conversion unit enters the working state, the DC-DC conversion unit realizes regulated voltage signal output through an internal circuit of the regulated voltage unit, and the regulated voltage output value of the DC-DC conversion unit is consistent with the system voltage value; after the voltage stabilizing function is started, the starting state of the DC-DC conversion unit is fed back to the controller, the controller performs information verification, the verification result is fed back to the touch screen, and after the touch screen receives a voltage stabilizing function output instruction sent by the controller, the DC-DC conversion unit 12v or 24v working state indicator lamp is lighted, and the color is yellow;
when the power supply voltage is set to be 5v, a user-defined voltage setting function is started in a multi-mode output power supply system management interface of the touch screen, user-defined voltage value setting is carried out according to an actual demand voltage value of 5v, after setting is completed, the touch screen sends setting information to the DC-DC conversion unit, the DC-DC conversion unit adjusts the user-defined voltage output value to be 5v output through the self voltage regulating unit according to the setting requirement, the controller detects the user-defined voltage specific output value of the DC-DC conversion unit and compares the user-defined voltage specific output value with the setting value of the touch screen, the controller is consistent with the setting value of the touch screen, the controller does not carry out adjustment processing, if the difference between the user-defined voltage specific output value and the setting value is large, the controller automatically carries out instruction fine adjustment on the DC-DC conversion unit, the user-defined voltage value is stabilized near the setting value of the touch screen, and automatic correction of the user-defined voltage is achieved.
2. The method for controlling power supply of a construction machine according to claim 1, wherein,
the DC-DC conversion unit (4) comprises: the voltage regulator comprises a voltage boosting circuit, a voltage reducing circuit, a voltage stabilizing circuit and a voltage regulating circuit.
3. The method for controlling power supply of a construction machine according to claim 1, wherein,
the third end of the storage battery relay (3) is connected with the second end of the DC-DC conversion unit (4) through a safety tube (8);
the third end of the storage battery relay (3) is connected with the first end of the controller (6) through a safety tube (8);
the third end of the storage battery relay (3) is connected with the first end of the touch screen (5) through a protective tube (8).
4. The method for controlling power supply of a construction machine according to claim 1, wherein,
the touch screen (5), the controller (6) and the DC-DC conversion unit (4) are connected through a CAN bus and realize data communication.
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| CN111624899A (en) * | 2020-06-30 | 2020-09-04 | 核工业理化工程研究院 | Multi-mode control system and control method thereof for large-scale system |
| CN113013948B (en) * | 2021-03-09 | 2023-04-14 | 一汽解放汽车有限公司 | Board carries power supply control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203332006U (en) * | 2013-05-24 | 2013-12-11 | 山推工程机械股份有限公司 | Bulldozer starting auxiliary system based on super capacitor |
| CN207021722U (en) * | 2017-06-21 | 2018-02-16 | 镇江中船现代发电设备有限公司 | DC low voltage power supply output device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203332006U (en) * | 2013-05-24 | 2013-12-11 | 山推工程机械股份有限公司 | Bulldozer starting auxiliary system based on super capacitor |
| CN207021722U (en) * | 2017-06-21 | 2018-02-16 | 镇江中船现代发电设备有限公司 | DC low voltage power supply output device |
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| CN109802461A (en) | 2019-05-24 |
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