CN102761302A - Direct current motor controller for lifting hydraulic pump of electric forklift - Google Patents
Direct current motor controller for lifting hydraulic pump of electric forklift Download PDFInfo
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- CN102761302A CN102761302A CN2012102706759A CN201210270675A CN102761302A CN 102761302 A CN102761302 A CN 102761302A CN 2012102706759 A CN2012102706759 A CN 2012102706759A CN 201210270675 A CN201210270675 A CN 201210270675A CN 102761302 A CN102761302 A CN 102761302A
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- motor controller
- mcu
- current
- controller
- hydraulic pump
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- 230000001133 acceleration Effects 0.000 claims abstract description 4
- 230000005669 field effect Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- Forklifts And Lifting Vehicles (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses a direct current motor controller for a lifting hydraulic pump of an electric forklift. The direct current motor controller comprises an input module, an MCU (Micro-programmed Control Unit) and an output drive circuit, wherein the input module comprises a voltage collection module, a temperature collection module, a current over-current collection module and an acceleration collection module, the MCU adopts a micro-chip PIC16F914 single-chip microcomputer, and the input module, the MCU and the output drive circuit are electrically connected. According to the motor controller, the motor can be stably operated under the work conditions of low voltage and large current and different working characteristics can be provided according to different work condition requirements of drivers, so that the using requirements of the drivers can be satisfied. The direct current motor controller has better heat radiation, and the operating condition of the motor is changed according to change of the work environment temperature, so that the whole system is protected. Meanwhile, the controller has an over-current protection function, when the working current is too large, the working current of the system is automatically stabilized in a limit value by the controller so as to prevent the motor or the other component from burning.
Description
Technical field
The present invention relates to electri forklift lifting hydraulic pump DC motor controller, belong to engineering vehicle electronics technical field.
Background technology
Electri forklift lifting hydraulic pump is the important component part of fork truck hoisting system, and its effect is to convert the low pressure oil in the fuel tank to hydraulic oil, realizes the action of the fork truck raft of pontoons through pipeline, accomplishes the actions such as lifting, whereabouts of load.The hydraulic pressure pump performance characteristic directly influences the lifting performance of fork truck.
Usually, hydraulic pump adopts direct current machine as its power set.DC motor have good speed adjustment features, starting easily, can the load-carrying starting etc. advantage.But the power supply of fork truck is usually by the power supply of the lead accumulator of 48V, so DC motor is operated in the environment of low-voltage, big electric current, and direct current machine operation quality is directly decided by DC motor controller.Need the operation of the safe and reliable control fork truck motor of controller ability, improve the comfortableness of driving, protection driver's safety, the operation of stability and high efficiency.Therefore, stability, the reliability to electric machine controller has higher requirement.Wherein, the heat radiation of controller, aspects such as oneself's detection of fault need better to improve and improve.
Summary of the invention
The objective of the invention is provides a kind of realization electri forklift with lifting hydraulic pump control DC motor controller to the demand, and when it moves, motor is carried out the real-time guard of temperature, electric current and voltage.
The technical scheme that the present invention adopts is:
Said electri forklift lifting hydraulic pump DC motor controller; Comprise input module, MCU and output driving circuit; Said input module is made up of voltage acquisition module, temperature collect module, overcurrent acquisition module and acceleration acquisition module; Said MCU (micro-control unit) uses little core PIC16F914 single-chip microcomputer, and input module, MCU and output driving circuit are electrically connected.
Said output driving circuit uses N channel enhancement isolated-gate field effect transistor (IGFET) MOSFET pipe IRF2807 and contains thermo-sensitive resistor, and said thermo-sensitive resistor adopts normal temperature 40K Ω thermo-sensitive resistor.
The PIC16F914 single-chip microcomputer of said MCU comprises voltage protection, current protection, temperature acquisition protection and house dog program.
The MCU of electri forklift hydraulic pump DC motor controller of the present invention adopts pulse-width modulation that drive circuit is controlled.Concrete principle is: MCU output pulse width modulation signal; Behind analog circuit; Generation can the simplified pipe MOSFET of driving N channel enhancement insulated-gate field-effect signal, realize opening or closing MOSFET, and then realize the conducting and the closure (conducting and disconnection) of circuit.Said electri forklift hydraulic pump DC motor controller handling procedure is controlled major cycle zero clearing house dog by the initialization of following function weaving: MCU, fault detect, the starting state of opening before timer interrupts, starts.After the normal startup of controller,, gather the accelerator input like this according to the running status of system; Voltage; Coherent signal such as temperature and electric current carries out different protection (voltage protection, current protection and temperature protection), and the output of in good time adjusting duty cycle signals.
Adopt the beneficial effect of technique scheme to be:
Realized the stable operation of motor under low pressure, big electric current operating mode, can different operational characteristics be provided, satisfied driver's instructions for use according to the requirement of driver's different working conditions.Have thermal diffusivity preferably, can change the operation conditions of motor, realize protection whole system according to the variation of operating ambient temperature.Simultaneously, controller has overcurrent protection function, and when operating current was excessive, controller in limit value, prevented burning of motor or miscellaneous part with the operating current automatic stabilisation of system.
Description of drawings
Fig. 1 is the structured flowchart that electri forklift hydraulic pump DC motor controller of the present invention is connected with motor.
Fig. 2 is an electri forklift hydraulic pump DC motor controller handling procedure flow chart.
Embodiment
Embodiment
Below in conjunction with accompanying drawing electri forklift hydraulic pump DC motor controller of the present invention is described further.
Said electri forklift lifting hydraulic pump DC motor controller; This controller comprises input module, MCU and output driving circuit; Said input module is made up of voltage acquisition module, temperature collect module, overcurrent acquisition module and acceleration acquisition module; Said MCU (micro-control unit) uses little core PIC16F914 single-chip microcomputer, and input module, MCU and output driving circuit are electrically connected, and be as shown in Figure 1.
Said output driving circuit uses N channel enhancement isolated-gate field effect transistor (IGFET) MOSFET pipe IRF2807 and contains thermo-sensitive resistor, and said thermo-sensitive resistor adopts normal temperature 40K Ω thermo-sensitive resistor.
The PIC16F914 single-chip microcomputer of said MCU comprises voltage protection, current protection, temperature acquisition protection and house dog program.
It is example that the course of work is opened with the accelerator input switch, and after the single-chip microcomputer initialization, the detection system state under the fault-free prerequisite, is accomplished precharge.After the precharge end, single-chip microcomputer detects the accelerator input, simultaneously, and system acquisition voltage, signals such as temperature.Under its normal situation,, calculate corresponding duty cycle signals according to the accelerator input.If system detects fault, duty cycle signals is output as zero, and single-chip microcomputer is reported corresponding fault, and is as shown in Figure 2.
The protection of this controller can be divided three classes, and is respectively: current protection, voltage protection, temperature protection, protection to error-polarity connection of power supply.Protection range and process are respectively:
Claims (3)
1. electri forklift lifting hydraulic pump DC motor controller; It is characterized in that: this controller comprises input module, MCU and output driving circuit; Said input module is made up of voltage acquisition module, temperature collect module, overcurrent acquisition module and acceleration acquisition module; Said MCU uses little core PIC16F914 single-chip microcomputer, and input module, MCU and output driving circuit are electrically connected.
2. electri forklift lifting hydraulic pump DC motor controller as claimed in claim 1; It is characterized in that: said output driving circuit uses N channel enhancement isolated-gate field effect transistor (IGFET) MOSFET pipe IRF2807 and contains thermo-sensitive resistor, and said thermo-sensitive resistor adopts normal temperature 40K Ω thermo-sensitive resistor.
3. electri forklift lifting hydraulic pump DC motor controller as claimed in claim 1 is characterized in that: the PIC16F914 single-chip microcomputer of said MCU comprises voltage protection, current protection, temperature acquisition protection and house dog program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102706759A CN102761302A (en) | 2012-08-01 | 2012-08-01 | Direct current motor controller for lifting hydraulic pump of electric forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102706759A CN102761302A (en) | 2012-08-01 | 2012-08-01 | Direct current motor controller for lifting hydraulic pump of electric forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102761302A true CN102761302A (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102706759A Pending CN102761302A (en) | 2012-08-01 | 2012-08-01 | Direct current motor controller for lifting hydraulic pump of electric forklift |
Country Status (1)
| Country | Link |
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| CN (1) | CN102761302A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202026269U (en) * | 2011-05-17 | 2011-11-02 | 遵义天义利威机电有限责任公司 | Controller for automobile direct-current brushless electric fuel pump without position sensor |
| CN202297041U (en) * | 2011-09-29 | 2012-07-04 | 郑州四维机电设备制造有限公司 | Hydraulic pump control system for electric forklift |
| CN203086399U (en) * | 2012-08-01 | 2013-07-24 | 遵义天义利威机电有限责任公司 | Direct-current motor controller of electric fork truck lifting hydraulic pump |
-
2012
- 2012-08-01 CN CN2012102706759A patent/CN102761302A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202026269U (en) * | 2011-05-17 | 2011-11-02 | 遵义天义利威机电有限责任公司 | Controller for automobile direct-current brushless electric fuel pump without position sensor |
| CN202297041U (en) * | 2011-09-29 | 2012-07-04 | 郑州四维机电设备制造有限公司 | Hydraulic pump control system for electric forklift |
| CN203086399U (en) * | 2012-08-01 | 2013-07-24 | 遵义天义利威机电有限责任公司 | Direct-current motor controller of electric fork truck lifting hydraulic pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121031 |