CN104821617B - A kind of linear motor type feed energy suspension system super capacitor mode switching circuit and its method - Google Patents
A kind of linear motor type feed energy suspension system super capacitor mode switching circuit and its method Download PDFInfo
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Abstract
The invention discloses a kind of linear motor type feed energy suspension system super capacitor mode switching circuit and its method, including control unit ECU, voltage detecting circuit, two super capacitors, four metal-oxide-semiconductors, two metal-oxide-semiconductor driving chip IR2101, photoelectrical coupler, linear electric motors, rectifier, DC/DC converters, resistance R, the total storage device of energy, buzzers；Described control unit ECU by detect two super capacitor A, B two ends voltage, when charging capacitor voltage reaches that setting switches to discharge capacity, while discharge capacity switches to charging capacitor.Charging capacitor is responsible for absorbing the energy that generator is produced, and discharge capacity provides energy to DC/DC circuits or battery all the time.Present invention adds the safeguard measure directly consumed energy for alarm of voltage when excessive and internal resistance.The present invention can realize meet linear electric motors be used as power area requirement while, lift the energy recovery efficiency of whole energy regenerative system.
Description
Technical field
Present invention design electronic circuit is related to control field and automotive field, more particularly to a kind of feed energy suspension system is super
Capacitive switching circuit and its method.
Background technology
For traditional passive suspension, the energy of body vibrations is converted into thermal energy consumption by damper and dissipated, and this technology is related to
And the feed energy suspension system based on linear motor type body vibrations energy can be converted into electric energy and reclaimed.In recent years,
The recovery research for being related to suspension vibration energy gradually increases.That is announced in Patent No. 201210586145.5 carries vibrational energy
The energy accumulation hanger device of recovery, does not provide clear and definite recovery circuit.Paper《Energy motorcar electric Active suspension theory and
Experimental study》By DC/DC converter applications in feed energy suspension system, but super capacitor pattern switching is not referred to, energy
Organic efficiency is relatively low.
The content of the invention
Deficiency regarding to the issue above, the present invention for feed energy suspension system provide a kind of super capacitor mode switching circuit and
Its method, excursion of the terminal voltage of super capacitor in charge and discharge process can be controlled very well, and realization meets motor effect
Power requirement so that meet the requirement of suspension system comfortableness simultaneously, improve the efficiency that energy regenerative system capacity is reclaimed.
The technical scheme is that：
A kind of linear motor type feed energy suspension system super capacitor mode switching circuit, including the inspection of control unit ECU, voltage
It is slowdown monitoring circuit, two super capacitors, four metal-oxide-semiconductors, two metal-oxide-semiconductor driving chip IR2101, photoelectrical coupler, linear electric motors, whole
Flow device, DC/DC converters, resistance R, the total storage device of energy, buzzer；Described control unit ECU input port is examined with voltage
The output end of slowdown monitoring circuit is connected, control unit ECU three output ports control port respectively with photoelectrical coupler, first
Metal-oxide-semiconductor driving chip IR2101, the second metal-oxide-semiconductor driving chip IR2101 input port are connected, the first metal-oxide-semiconductor driving chip
Grid, the grid of the second metal-oxide-semiconductor of IR2101 output port respectively with the first metal-oxide-semiconductor are connected, the second metal-oxide-semiconductor driving chip
Grid, the grid of the 4th metal-oxide-semiconductor of IR2101 output port respectively with the 3rd metal-oxide-semiconductor are connected；The input of voltage detecting circuit
End is connected with super capacitor A positive terminal, super capacitor B positive terminal；The output end of the linear electric motors and rectifier phase
Even, rectifier output end is connected with the input of DC/DC converters, the positive pole of the output end of DC/DC converters respectively with buzzing
The positive pole of device, the drain electrode of the first metal-oxide-semiconductor, the drain electrode of the 3rd metal-oxide-semiconductor are connected；The positive pole phase of the negative pole of buzzer and photoelectrical coupler
Even, the source electrode of the first metal-oxide-semiconductor positive terminal respectively with super capacitor A, the drain electrode of the second metal-oxide-semiconductor are connected, the source electrode of the 3rd metal-oxide-semiconductor
Positive terminal respectively with super capacitor B, the drain electrode of the 4th metal-oxide-semiconductor are connected, the source electrode of the second metal-oxide-semiconductor, the 4th metal-oxide-semiconductor source electrode it is equal
It is connected simultaneously with the positive terminal of the total storage device of energy；The negative pole end of the total storage device of energy simultaneously with super capacitor A negative pole ends, super
Electric capacity B negative pole end, the negative pole of the output end of DC/DC converters are connected；Resistance R one end and the negative pole phase of photoelectrical coupler
Even, the resistance R other end is connected with the negative pole of the output end of DC/DC converters.
Further, described control unit ECU is used for the processing and calculating of data, judges whether charging capacitor is more than regulation
Whether value, discharge capacity is less than setting, if meeting switching condition, charging capacitor and discharge capacity are operated pattern switching.
Further, the voltage detecting circuit is used to measure super capacitor A, super capacitor B terminal voltage in real time, will detect
Signal feeds back to control unit ECU.
Further, the voltage detecting circuit includes resistance R1, resistance R2, resistance R3, amplifier LF353；
The anode of the super capacitor A and super capacitor B are connected with amplifier LF353 inverting input resistance R1, instead
The phase input pickup resistance R1 other end is connected with feedback resistance R3 one end and amplifier LF353 inverting input simultaneously, instead
The feed resistance R3 other end is connected with amplifier LF353 output end, and the signal of amplifier LF353 output ends and control unit is defeated
Enter end to be connected, reference voltage is connected with amplifier LF353 normal phase input end resistance R2, the normal phase input end resistance R2 other end
It is connected with amplifier LF353 normal phase input end.
The technical scheme of method of the present invention is：
A kind of linear motor type feed energy suspension system super capacitor mode switching method, including step：
Step 1, control unit ECU is acquired to the voltage signal of electric voltage observation circuit；
Step 2, ECU carries out calculating analysis to the voltage signal collected, if super capacitor terminal voltage value is more than regulation
Upper voltage limit threshold values, then driving chip IR2101 of the control unit ECU output control signals to metal-oxide-semiconductor control metal-oxide-semiconductor
Switch realizes the switching of charging capacitor and discharge capacity；
Step 3, if due to fault so that the terminal voltage of two super capacitors is all higher than defined upper voltage limit valve
Value, then the output end of DC/DC converters and two super capacitors disconnections, connect and alarm with a high-power resistance R；
Step 4, if super capacitor terminal voltage value is not more than defined upper voltage limit threshold values, judge whether its value is less than rule
Fixed lower voltage limit threshold values, if being less than, driving chip IR2101 of the control unit ECU output control signals to metal-oxide-semiconductor, control
The switch of metal-oxide-semiconductor realizes the switching of charging capacitor and discharge capacity；
Step 5, if super capacitor terminal voltage is not less than defined lower voltage limit threshold values, return judges that entrance repeats to sentence
It is disconnected.
Further, the detailed process of the step 3 is：
If due to fault or electric power generation efficiency is too high, discharge capacity discharging efficiency is too low, two super capacitors
Terminal voltage be all higher than as defined in upper voltage limit threshold values, the III roads high level pulse that control unit ECU is exported is to photoelectric coupling
Device, makes the output end of DC/DC converters be connected with buzzer and high-power resistance R, and circuit sends fault warning, what motor was produced
Electric energy is dissipated in the form of heat energy；The metal-oxide-semiconductor being connected simultaneously with DC/DC converter output terminals and two super capacitors is located simultaneously
In off-state, the metal-oxide-semiconductor being connected with the total storage device input of energy and two super capacitors is simultaneously in the conduction state, makes two
Individual super capacitor discharges to the total storage device of energy simultaneously.
Compared with prior art, feed energy suspension system super capacitor mode switching structure of the invention has advantages below：
1. present invention adds the safeguard measure directly consumed energy for alarm of voltage when excessive and internal resistance.
2. traditional charge-discharge circuit being made up of four metal-oxide-semiconductors is tightly used to realize discharge and recharge, or as a kind of slow
Circuit is rushed to use, and the circuit of this in the present invention is used to realize that adjustment linear electric motors are used as power scope, and then improve the seating of suspension
Comfortableness simultaneously, lifts the energy recovery efficiency of whole energy regenerative system.
3. export the working characteristics of two-way pulse-reverse in the present invention using metal-oxide-semiconductor driving chip, the one the second two are allowed
Metal-oxide-semiconductor switching signal is homologous, and the 3rd the 4th two metal-oxide-semiconductor switching signal is homologous, and control logic is eased, and adding IR2101 can
Signal amplifying function is realized, driving is more stablized, and whole system working effect is more preferable.
Brief description of the drawings
Fig. 1 is linear motor type feed energy suspension system super capacitor mode switching circuit figure of the invention；
Fig. 2 is super capacitor terminal voltage detecting circuit；
Fig. 3 is the switch logic schematic diagram of super capacitor.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiments of the present invention are further elaborated.
A kind of linear motor type feed energy suspension system super capacitor mode switching circuit and its method of the present invention, including control
Unit ECU processed, voltage detecting circuit, super capacitor discharge and recharge switch logic, switch controlled circuit.Described control unit ECU
By detecting the voltage at two super capacitor A, B two ends, when charging capacitor voltage reaches that setting switches to discharge capacity, together
When discharge capacity switch to charging capacitor.Charging capacitor is responsible for absorbing the energy that generator is produced, and discharge capacity is all the time to energy
Total storage device or battery provide energy.Described control unit ECU is used for the processing and calculating of data, whether judges charging capacitor
More than setting, whether discharge capacity is less than setting, if meeting switching condition, charging capacitor and discharge capacity are operated mould
Formula switches, and charging capacitor is changed into discharge capacity, and discharge capacity is changed into charging capacitor.
The voltage detecting circuit includes：Two super capacitors A, B one end ground connection (DC/DC converter output terminals it is negative
Pole), the other end is connected with amplifier inverting input resistance, the other end of inverting input resistance simultaneously with feedback resistance one
End is connected with the inverting input of amplifier, and the other end of feedback resistance is connected with the output end of amplifier, amplifier out
It is connected with the signal input part of control unit.Reference voltage is connected with the normal phase input end resistance of amplifier, normal phase input end electricity
The other end of resistance is connected with the normal phase input end of amplifier.
The control unit ECU of linear motor type feed energy suspension system super capacitor mode switching circuit as shown in Figure 1, passes through
Collection two super capacitors A and B terminal voltage carry out analysis judgement, and the control signal I and II of output are respectively to two metal-oxide-semiconductors
Driving chip IR2101.The IR2101 being connected in figure with I roads signal wire is to 1. and 2. two metal-oxide-semiconductors (the first metal-oxide-semiconductor, the 2nd MOS
Pipe) send control signal, signal wire connected IR2101 in figure Zhong Yu II roads is to 3. and 4. two metal-oxide-semiconductors (the 3rd metal-oxide-semiconductor, the 4th
Metal-oxide-semiconductor) control signal is sent, figure Zhong III road control signals send control signal to photoelectrical coupler.Normal operation
Under, 1. and 4. simultaneously turn on, turn off, 2. and 3. simultaneously turn on and turn off.When linear electric motors in figure are with generator mode
The three-phase alternating current of output is conveyed to DC/DC converters in the energy storage after mode switching circuit after rectifier rectification.
The voltage detecting circuit realization principle figure of the present invention as shown in Figure 2：
One end ground connection (DC/ of charge or discharge electric capacity (two super capacitors) is monitored in the voltage detecting circuit
The negative pole of DC converter output terminals), the other end is connected with operational amplifier LF353 inverting input resistance R1, anti-phase input
The end resistance R1 other end is connected with feedback resistance R3 one end and amplifier LF353 inverting input simultaneously, feedback resistance
The R3 other end is connected with amplifier LF353 output end, and amplifier LF353 output ends and control unit ECU signal are inputted
End is connected.Reference voltage VREF is connected with amplifier LF353 normal phase input end resistance R2, and normal phase input end resistance R2's is another
End is connected with amplifier LF353 normal phase input end.
The super capacitor switching principle figure of the present invention is illustrated in figure 3, detailed process is：
Described control unit ECU is acquired to the voltage signal of electric voltage observation circuit and calculates analysis, if super capacitor A
Or B has a magnitude of voltage to be more than defined upper voltage limit threshold values, such as super capacitor A is more than defined upper voltage limit threshold values, then controlled
Unit ECU processed to control signal wire I with low level, to control signal wire II with high level.The driving chip IR2101 will drive
Dynamic signal is divided into the opposite signal of two-way, and the driving chip being connected with I roads signal wire is to 1. number metal-oxide-semiconductor (the first metal-oxide-semiconductor) with low
Level is turned it off, and is turned it on to 2. number metal-oxide-semiconductor (the second metal-oxide-semiconductor) with high level, and such super capacitor A is switched by charging
For discharge mode.The driving chip being connected with II roads signal wire is turned it on to 3. number metal-oxide-semiconductor (the 3rd metal-oxide-semiconductor) with high level,
Turned it off to 4. number metal-oxide-semiconductor (the 4th metal-oxide-semiconductor) with low level, such super capacitor B switches to charge mode by electric discharge.
If super capacitor A and B magnitude of voltage judge super capacitor terminal voltage no more than defined upper voltage limit threshold values
Whether defined lower voltage limit threshold values is less than, if super capacitor A is less than defined lower voltage limit threshold values, then control unit ECU
To control signal wire I with high level, to control signal wire II with low level.Drive signal is divided into by the driving chip IR2101
The opposite signal of two-way, the driving chip being connected with I roads signal wire (the first metal-oxide-semiconductor driving chip IR2101) is to 1. number metal-oxide-semiconductor
Turned it on, turned it off to a 2. number metal-oxide-semiconductor with low level with high level, such super capacitor A switches to charging by electric discharge
Pattern.The driving chip (the second metal-oxide-semiconductor driving chip IR2101) being connected with II roads signal wire is made to a 3. number metal-oxide-semiconductor with low level
It is turned off, and is turned it on to a 4. number metal-oxide-semiconductor with high level, and such super capacitor B switches to discharge mode by charging.
If super capacitor A or B terminal voltage are simultaneously greater than defined upper voltage limit value, control unit is to photoelectrical coupler one
Individual high level, DC/DC converter output terminals are connected with high-power resistance R, and high-power resistance series connection buzzer is alarmed.Simultaneously
1. and 3. metal-oxide-semiconductor is off state, and 2. and 4. metal-oxide-semiconductor is on discharging to super capacitor.
The super capacitor discharge and recharge switch logic includes：Control unit ECU enters to the voltage signal of electric voltage observation circuit
Row gathers and calculates analysis.If magnitude of voltage is more than defined upper voltage limit threshold values, control unit ECU output control signals are given
The driving chip of metal-oxide-semiconductor controls the switch of four metal-oxide-semiconductors to realize the switching of charging capacitor and discharge capacity；If magnitude of voltage is not
More than defined upper voltage limit threshold values, judge whether magnitude of voltage is less than defined lower voltage limit threshold values, if being less than, control unit
ECU output control signals control the switch of four metal-oxide-semiconductors to realize charging capacitor and discharge capacity to the driving chip of metal-oxide-semiconductor
Switching, judges that entrance repeats judgement if being returned not less than if.If due to fault so that the terminal voltage of two super capacitors is equal
More than defined upper voltage limit threshold values, then DC/DC converter output terminals and two super capacitors disconnections, with a high-power resistance
R connects, buzzer warning.
Described upper voltage limit and lower limit threshold values is determined by the scope that is used as power needed for feed energy suspension.
The metal-oxide-semiconductor control signal logic includes：Control unit ECU exports two pulse signals, wherein being all the way high electricity
Flat then another Lu Biwei low levels.Two pulse signals give two metal-oxide-semiconductor driving chips respectively, and two driving chips are generated respectively
Pulse signal two pairs high and low controls two pairs of metal-oxide-semiconductors.If super capacitor is as charging capacitor, to connecting this super capacitor
The metal-oxide-semiconductor being connected with DC/DC converters side is at conducting state with high level, total to this super capacitor of connection and energy
The connected metal-oxide-semiconductor in storage device side is at off state with low level；If super capacitor is as discharge capacity, to even
Connect the metal-oxide-semiconductor that this super capacitor is connected with DC/DC converters side and off state is at low level, this is super to connecting
The metal-oxide-semiconductor that electric capacity is connected with the total storage device side of energy is at conducting state with high level.
The metal-oxide-semiconductor control signal logic also includes：If because fault or electric power generation efficiency are too high, discharge electricity
Receiving electrical efficiency is too low, and the terminal voltage of two super capacitors is all higher than defined upper voltage limit threshold values, control unit ECU outputs
Photoelectrical coupler is given in III roads pulse (high level), the output end of rectifier is connected with high-power resistance R and buzzer.Simultaneously
The metal-oxide-semiconductor that is connected with DC/DC converter output terminals and two super capacitors while be off, with the total storage device of energy and
The connected metal-oxide-semiconductor of two super capacitors is simultaneously in the conduction state, makes two super capacitors while giving energy total storage device electric discharge.
It should be understood that above-mentioned example of applying is only illustrative of the invention and is not intended to limit the scope of the invention, the present invention is being read
Afterwards, modification of the those skilled in the art to the various equivalent form of values of the present invention falls within the application appended claims and limited
Scope.
Claims (4)
1. a kind of linear motor type feed energy suspension system super capacitor mode switching circuit, it is characterised in that：Including control unit
It is ECU, voltage detecting circuit, two super capacitors, four metal-oxide-semiconductors, two metal-oxide-semiconductor driving chip IR2101, photoelectrical coupler, straight
Line motor, rectifier, DC/DC converters, resistance R, the total storage device of energy, buzzer；
Described control unit ECU input port is connected with the output end of voltage detecting circuit, control unit ECU three outputs
Port control port respectively with photoelectrical coupler, the first metal-oxide-semiconductor driving chip IR2101, the second metal-oxide-semiconductor driving chip
IR2101 input port is connected, the first metal-oxide-semiconductor driving chip IR2101 output port grid respectively with the first metal-oxide-semiconductor,
The grid of second metal-oxide-semiconductor is connected, the second metal-oxide-semiconductor driving chip IR2101 output port grid respectively with the 3rd metal-oxide-semiconductor, the
The grid of four metal-oxide-semiconductors is connected；The input of voltage detecting circuit equal and super capacitor A positive terminal, super capacitor B positive terminal
It is connected；Described control unit ECU is used for the processing and calculating of data, judges whether charging capacitor is more than setting, discharge capacity
Whether setting is less than, if meeting switching condition, charging capacitor and discharge capacity are operated pattern switching；
The voltage detecting circuit is used to measure super capacitor A, super capacitor B terminal voltage in real time, and detection signal is fed back to
Control unit ECU；
The output end of the linear electric motors is connected with rectifier, and rectifier output end is connected with the input of DC/DC converters,
The positive pole of the output end of DC/DC converters positive pole respectively with buzzer, the drain electrode of the first metal-oxide-semiconductor, the drain electrode phase of the 3rd metal-oxide-semiconductor
Even；The negative pole of buzzer is connected with the positive pole of photoelectrical coupler, the source electrode of the first metal-oxide-semiconductor positive terminal respectively with super capacitor A,
The drain electrode of second metal-oxide-semiconductor is connected, the source electrode of the 3rd metal-oxide-semiconductor positive terminal respectively with super capacitor B, the drain electrode phase of the 4th metal-oxide-semiconductor
Even, the source electrode of the second metal-oxide-semiconductor, the source electrode of the 4th metal-oxide-semiconductor are connected with the positive terminal of the total storage device of energy simultaneously；The total saving of energy
The negative pole end put simultaneously with super capacitor A negative pole ends, super capacitor B negative pole end, the output end of DC/DC converters negative pole phase
Even；Resistance R one end is connected with the negative pole of photoelectrical coupler, the resistance R other end and the negative pole of the output end of DC/DC converters
It is connected.
2. linear motor type feed energy suspension system super capacitor mode switching circuit according to claim 1, its feature exists
In：The voltage detecting circuit includes resistance R1, resistance R2, resistance R3, amplifier LF353；
The anode of the super capacitor A and super capacitor B are connected with amplifier LF353 inverting input resistance R1, anti-phase defeated
The input resistance R1 other end is connected with feedback resistance R3 one end and amplifier LF353 inverting input simultaneously, feedback electricity
The resistance R3 other end is connected with amplifier LF353 output end, the signal input part of amplifier LF353 output ends and control unit
It is connected, reference voltage is connected with amplifier LF353 normal phase input end resistance R2, and the normal phase input end resistance R2 other end is with putting
Big device LF353 normal phase input end is connected.
3. a kind of linear motor type feed energy suspension system super capacitor mode switching method, it is characterised in that including step：
Step 1, control unit ECU is acquired to the voltage signal of electric voltage observation circuit；
Step 2, ECU carries out calculating analysis to the voltage signal collected, if super capacitor terminal voltage value is more than defined electricity
Upper limit threshold values is pressed, then driving chip IR2101 of the control unit ECU output control signals to metal-oxide-semiconductor control the switch of metal-oxide-semiconductor
Realize the switching of charging capacitor and discharge capacity；
Step 3, if due to fault so that the terminal voltage of two super capacitors is all higher than defined upper voltage limit threshold values, then
DC/DC converter output terminals and two super capacitors disconnect, and connect and alarm with a high-power resistance R；
Step 4, if super capacitor terminal voltage value is not more than defined upper voltage limit threshold values, judge whether its value is less than defined
Lower voltage limit threshold values, if being less than, driving chip IR2101 of the control unit ECU output control signals to metal-oxide-semiconductor controls metal-oxide-semiconductor
Switch realize the switching of charging capacitor and discharge capacity；
Step 5, if super capacitor terminal voltage is not less than defined lower voltage limit threshold values, return judges that entrance repeats judgement.
4. linear motor type feed energy suspension system super capacitor mode switching method according to claim 3, its feature exists
In：The detailed process of the step 3 is：
If due to fault or electric power generation efficiency is too high, discharge capacity discharging efficiency is too low, the end of two super capacitors
Voltage is all higher than defined upper voltage limit threshold values, and the III roads high level pulse that control unit ECU is exported makes to photoelectrical coupler
The output end of DC/DC converters is connected with buzzer and high-power resistance R, and circuit sends fault warning, the electric energy that motor is produced
Dissipated in the form of heat energy；The metal-oxide-semiconductor being connected simultaneously with DC/DC converter output terminals and two super capacitors is while in disconnected
Open state, the metal-oxide-semiconductor being connected with the total storage device input of energy and two super capacitors is simultaneously in the conduction state, makes two to surpass
Level electric capacity discharges to the total storage device of energy simultaneously.
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| CN106026330B (en) * | 2016-06-22 | 2019-01-08 | 江苏大学 | A kind of vehicle mixing suspension energy recycling storage circuit and its control method |
| CN108418287B (en) * | 2018-05-19 | 2023-10-10 | 北京合众汇能科技有限公司 | FTU distribution terminal super capacitor backup power system |
| CN112421971A (en) * | 2019-08-21 | 2021-02-26 | 万国半导体(开曼)股份有限公司 | Power supply conversion system and control method |
| CN111273076A (en) * | 2020-02-26 | 2020-06-12 | 浙江禾川科技股份有限公司 | Servo driver and buffer circuit protection circuit thereof |
| CN113078868B (en) * | 2021-04-21 | 2023-04-14 | 上海电气集团股份有限公司 | Energy-saving control system and method |
| CN113270934B (en) * | 2021-06-30 | 2023-07-21 | 奇瑞新能源汽车股份有限公司 | Automobile piezoelectric recovery system and automobile |
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