CN207896714U - A kind of driving motor energy recycle device - Google Patents
A kind of driving motor energy recycle device Download PDFInfo
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- CN207896714U CN207896714U CN201820289500.5U CN201820289500U CN207896714U CN 207896714 U CN207896714 U CN 207896714U CN 201820289500 U CN201820289500 U CN 201820289500U CN 207896714 U CN207896714 U CN 207896714U
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Abstract
The utility model discloses a kind of driving motor energy recycle devices, including starting control module, charge control module, the input terminal of the charge control module is connect by starting control module with the DC bus of driving motor control circuit, and the charge control module output end is connect with accumulator；The startup control module is connect with driving motor on-position acquisition module, the on-position for obtaining driving motor.The utility model has the advantage of：The device does not change original driving motor control circuit, only need to can be completed the device serial connection after the DC bus of driving motor control circuit the recycling of braking energy, unexpected reduction of speed or the energy of braking generation can be effectively recycled, the utilization rate of dynamical system energy is improved；Retracting device is simple in structure, and organic efficiency is high；Charging management system controls buck transformation electric power road according to output voltage size, meets accumulator charging voltage to adjust the output voltage moment, keeps the stabilization of charging voltage.
Description
Technical field
The present invention relates to field of energy recovery, the more particularly to recycling of driving motor braking energy, are specifically related to one kind
Energy recycle device of the driving motor in braking.
Background technology
With the scarcity of the energy and the adjustment of the industrial structure, new-energy automobile, electric airplane and electric airplane automobile industry
Rapid development, driving motor system becomes more and more important, but driving motor is during speed governing, due to driving motor
Unexpected reduction of speed or braking, driving control system will produce counter electromotive force, these energy are used for driving motor and generate brake force
Square and braking resistor loss.
The unexpected reduction of speed of driving motor or braking are realized by being gradually reduced control system frequency, are reducing frequency
Moment, the synchronous rotational speed of driving motor can decline therewith, since the machinery inertial of driving motor acts on, the rotor of driving motor
Rotating speed does not change, and when synchronous rotational speed is less than rotor speed, the phase change 180 degree of rotor current, driving motor is by electronic
State is changed into generating state.The torque generated in drive motor shaft becomes braking moment, so that driving motor rotating speed is declined, in this way
The relative rotation speed of rotor speed and synchronous rotational speed reduces, and braking moment is reduced, and then generation counter electromotive force is caused to taper into.It drives
The counter electromotive force that dynamic motor braking generates feeds back to DC circuit after fly-wheel diode, when the electric energy of DC circuit can not pass through
When rectifier bridge feeds back to power grid, braking the energy of generation can be consumed in braking resistor, and then be distributed in the form of heat.For
Avoid the waste of the unexpected reduction of speed of driving motor or brake power generation, it is necessary to recycle the energy of this partial brake generation.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of driving motor energy recycle devices, are used for
The energy that the unexpected reduction of speed of driving motor or Brake stop generate is recycled, to improve capacity usage ratio.
To achieve the goals above, the technical solution adopted by the present invention is：A kind of driving motor energy recycle device, including
Start control module, charge control module, the input terminal of the charge control module is by starting control module and driving motor
The DC bus of control circuit connects, and the charge control module output end is connect with accumulator；The startup control module with
Driving motor on-position acquisition module connects, the on-position for obtaining driving motor.
The startup control module includes comparator, triode, and the driving motor on-position acquisition module is voltage
Acquisition module, the voltage acquisition module acquisition driving motor control circuit DC bus-bar voltage Udc；The input of the comparator
End difference input direct-current busbar voltage Udc and reference settings voltage Uset；The output end of the comparator and the base stage of triode
The emitter and collector of connection, the triode is separately connected charge control module, DC bus, and the triode is for controlling
The conducting of DC bus and charging control circuit processed.
The startup control module further includes photoelectric coupling driving circuit, and the photoelectric coupling driving circuit, which is serially connected in, to be compared
Between device output end and transistor base.
The charge control module includes transformer, buck translation circuit, the transformer and buck translation circuit
Input terminal connection, the output end of the buck translation circuit connect with accumulator.
The retracting device further includes charging management system, the lifting of the input terminal input acquisition of the charging management system
The output voltage values of translation circuit, the charging management system output end are pressed to output control signals to buck translation circuit to control
System adjusts the charging voltage of buck translation circuit.
The charging management system controls the output of buck translation circuit by adjusting output control signal dutyfactor
Voltage.
The advantage of the invention is that：The device does not change original driving motor control circuit, it is only necessary to by the device serial connection
The recycling of braking energy can be completed after the DC bus of driving motor control circuit, can effectively recycle unexpected reduction of speed or
The energy generated is braked, the utilization rate of dynamical system energy is improved；Retracting device is simple in structure, and organic efficiency is high；Charge Management
System controls buck transformation electric power road according to output voltage size, meets accumulator charging to adjust the output voltage moment
Voltage keeps the stabilization of charging voltage, reduces damage of the overvoltage to accumulator；Photoelectric coupling driving circuit can be according to comparator
On the one hand the digital quantity signal 0 or 1 of output, output triode VT8 driving control signal, photoelectric coupling driving circuit avoid electromagnetism
On the other hand interference provides stabilized driving and controls signal；Control signal is led in the triode VT9 shutdowns of buck translation circuit,
The size for controlling accumulator charging voltage stablizes accumulator charging by adjusting the duty ratio of triode VT9 shutdown and conducting
Voltage.
Description of the drawings
Below to each width attached drawing of description of the invention expression content and figure in label be briefly described：
Fig. 1 is wiring schematic diagram of the energy recycle device of the present invention in prior art driving motor control circuit；
Fig. 2 is energy recycle device structure principle chart of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is made further detailed by the description to optimum embodiment below against attached drawing
Thin explanation.
As shown in Figure 1, driving motor control circuit system block diagram, including inverter system, drive motor controller, driving
Motor, braking resistor, driving motor input voltage is after DC bus passes sequentially through braking resistor circuit, inverter system to drive
Dynamic motor, drive motor controller are used to control the break-make of inverter.The energy recycle device of the present invention is connected to DC bus
On, that is, it is connected on the DC bus of braking resistor connecting side, for recycling the energy consumed originally by braking resistor fever,
A, B point on DC bus i.e. in figure connects energy recycle device.
When drive motor controller receives the instruction of driving motor reduction of speed or braking, six IGBT control pipe meetings of inverter
Moment turns off, and copper coil powers off stream suddenly on stator, and the speed of rotating excitation field on stator is caused to reduce rapidly.Due to being used to for rotor
Property effect, rotor speed becomes larger with stator field rotating speed relative rotation speed moment, the coil on the permanent magnet cutting stator of rotor,
High current, and then voltage of the bus bar side output higher than busbar voltage Udc, which part voltage, electric current are generated on the circuit of closure
For rotor brake, separately partly it is braked resistance and is discharged in the form of heat.The energy recycle device of the utility model design is straight
It connects and is connected on the busbar of driving motor control system, recycling braking resistor absorbs the heat of release.
As shown in Fig. 2, driving motor energy recycle device includes starting control module, charge control module, charge control
The input terminal of module is connect by starting control module with the DC bus of driving motor control circuit, charge control module output
End is connect with accumulator；Start control module to connect with driving motor on-position acquisition module, for obtaining driving motor
On-position.
It includes comparator, triode, photoelectric coupling driving circuit to start control module, and driving motor on-position acquires mould
Block is voltage acquisition module, and voltage acquisition module acquires driving motor control circuit DC bus-bar voltage Udc；The input of comparator
End difference input direct-current busbar voltage Udc and reference settings voltage Uset；The output end of comparator and the base stage of triode connect,
The emitter and collector of triode is separately connected charge control module, DC bus, triode for control DC bus with
The conducting of charging control circuit.Photoelectric coupling driving circuit is serially connected between comparator output terminal and transistor base.
Two numerical value that comparator compares are DC bus-bar voltage Udc and setting voltage Uset.DC bus-bar voltage Udc is logical
Hall voltage sensor detection is crossed, sets voltage value Uset as DC bus-bar voltage and the difference for generating voltage needed for torque
Value, the determination of setting voltage Uset need to measure triode VT7 conducting moment triode both end voltage UAB, which is to set
Constant voltage Uset.Under normal condition, DC bus-bar voltage Udc is equal with setting voltage Uset, the number letter of comparator output at this time
Number 0；When driving motor is in unexpected reduction of speed or on-position, DC bus-bar voltage Udc is more than setting voltage Uset, compares at this time
Compared with device output digit signals 1.Loss, distortion in order to avoid triode VT8 control signals S1, pass through photoelectric coupling driving circuit
Either 1 convert the digital signaling zero that comparator obtains to the control signal S1 and then shutdown or three poles of conducting that triode drives
Pipe VT8.
Charge control module includes transformer, buck translation circuit, the input terminal of transformer and buck translation circuit
Connection, the output end of buck translation circuit are connect with accumulator.In braking, the electric energy of generation is braked in triode VT8 conductings
By after transformer, buck translation circuit to charge the battery.Buck translation circuit is by triode VT9, diode D2, electricity
The difference of output voltage can be realized in the circuit that resistance, capacitance, inductance form, the conducting dutycycle by controlling triode VT9.
In a preferred embodiment, retracting device further includes charging management system, the input terminal of charging management system
The output voltage values of the buck translation circuit of acquisition are inputted, charging management system output end outputs control signals to lifting buckling
Circuit is changed to control to adjust the charging voltage of buck translation circuit.Charging management system may be used charging management chip or
PWM chip is realized, the output voltage of buck translation circuit is controlled by adjusting output control signal dutyfactor.
The formula of counter electromotive force is generated according to the unexpected reduction of speed of driving motor system or braking：
E=4.44NKf Φ, f=pn/60
Wherein E is the counter electromotive force of driving motor, and N is to pound number, and K is constant coefficient, and f is frequency, and P is number of pole-pairs, and n is to turn
Speed, Φ are magnetic flux.
The unexpected reduction of speed of driving motor or braking are realized by being gradually reduced control system frequency f, are reducing frequency
The synchronous rotational speed n of the moment of rate, driving motor can decline therewith, when synchronous rotational speed is less than rotor speed at this time, rotor current
Phase change 180 degree, driving motor counter electromotive force E can also increase moment, and with frequency, the reduction of rotating speed, counter electromotive force
Also it can reduce therewith, i.e., counter electromotive force is the electromotive force of variation, and the counter electromotive force of variation is transformed to buck and converted by transformer T
The input terminal Ui of circuit is detected the voltage at the both ends diode D2 in buck translation circuit by charging management system, works as detection
It is less than charging voltage to diode both end voltage U0, buck translation circuit controls the duty of signal by regulating and controlling triode VT9
Than boosting；When detecting diode both end voltage U0 higher than charging voltage, buck translation circuit, which passes through, regulates and controls triode
The duty ratio of VT9 control signals is depressured, and charging voltage is the extraneous accumulator charging voltage of foundation to determine here.Lift buckling
Changing circuit output voltage U0 formula is：
U0=Ui* α/(1- α)
Wherein, α is the duty ratio for driving triode VT9 conductings.
Accumulator charging management system module is made of accumulator and charging management system, and charging management system is according to lifting
The size of the voltage U0 and setting accumulator charging voltage value of volt circuit output end, output triode VT9 driving control signal are led to
Overcharge management ensures that accumulator charging voltage is stablized in certain value, and accumulator is maintained to charge under pressure constant state.
The principle of energy regenerating is：When driving motor is braked, the unexpected reduction of speed of driving motor system or braking generate instead
It is electronic, the input terminal voltage Udc of the DC bus acquired at this time by Hall voltage sensor the and voltage Uset more than setting,
Comparator output digit signals 1 at this time, the digital signal are fed through the base stage of triode VT8 by optocoupler driving circuit, to
The conducting of triode VT8 is driven, after VT8 conductings, the electric energy generated on the busbar of driving motor control circuit is sent to by VT8
In transformer T, the counter electromotive force of the electric energy of variation is transformed to the input voltage Ui of step-up/step-down circuit input side by transformer T, is risen
The output end of step-down conversion circuit connects accumulator, to charge the battery, to complete the recycling of energy；Charging management system obtains
It takes the output end voltage U0 of buck translation circuit and compared with the charging voltage of preset accumulator, sends out control signal PWM
Control the output voltage of buck translation circuit so that output voltage reaches accumulator charging voltage, to ensure that charging electricity
Pressure meets the rated charging voltage of accumulator, ensure that the safety of energy regenerating charging.
Energy recycle device can easily be applied in the control circuit of existing driving motor in the present embodiment, it is only necessary to
It is corresponding generate braking electric energy circuit on connect the present apparatus, do not change original drive control circuit system structure,
Energy recycle device is directly connected to busbar both sides by switching and both can be used by control performance.Charging management system can ensure
The energy that constant-voltage charge avoids accumulator overvoltage from charging, while recycling can be supplied to peripheral power supply unit to use, and improve the energy
Utilization rate, improve the cruising ability of power system device.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using the methodology and skill of the present invention
The improvement for the various unsubstantialities that art scheme carries out, within protection scope of the present invention.
Claims (6)
1. a kind of driving motor energy recycle device, it is characterised in that：It is described including starting control module, charge control module
The input terminal of charge control module is connect by starting control module with the DC bus of driving motor control circuit, the charging
Control module output end is connect with accumulator；The startup control module is connect with driving motor on-position acquisition module, is used
In the on-position for obtaining driving motor.
2. a kind of driving motor energy recycle device as described in claim 1, it is characterised in that：The startup control module packet
Comparator, triode are included, the driving motor on-position acquisition module is voltage acquisition module, and the voltage acquisition module is adopted
Collect driving motor control circuit DC bus-bar voltage Udc；The comparator input terminal difference input direct-current busbar voltage Udc and
Reference settings voltage Uset；The output end of the comparator and the base stage of triode connect, the emitter sum aggregate of the triode
Electrode is separately connected charge control module, DC bus, and the triode is used to control DC bus and charging control circuit
Conducting.
3. a kind of driving motor energy recycle device as claimed in claim 2, it is characterised in that：The startup control module is also
Including photoelectric coupling driving circuit, the photoelectric coupling driving circuit is serially connected between comparator output terminal and transistor base.
4. a kind of driving motor energy recycle device as described in claim 1, it is characterised in that：The charge control module packet
Transformer, buck translation circuit are included, the transformer is connect with the input terminal of buck translation circuit, the buck transformation
The output end of circuit is connect with accumulator.
5. a kind of driving motor energy recycle device as claimed in claim 4, it is characterised in that：The retracting device further includes
Charging management system, the output voltage values of the buck translation circuit of the input terminal input acquisition of the charging management system, institute
It states charging management system output end and outputs control signals to buck translation circuit to control to adjust filling for buck translation circuit
Piezoelectric voltage.
6. a kind of driving motor energy recycle device as claimed in claim 5, it is characterised in that：The charging management system is logical
Output control signal dutyfactor is overregulated to control the output voltage of buck translation circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820289500.5U CN207896714U (en) | 2018-03-01 | 2018-03-01 | A kind of driving motor energy recycle device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820289500.5U CN207896714U (en) | 2018-03-01 | 2018-03-01 | A kind of driving motor energy recycle device |
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| CN207896714U true CN207896714U (en) | 2018-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565942A (en) * | 2018-03-01 | 2018-09-21 | 中电科芜湖钻石飞机制造有限公司 | Driving motor energy recycle device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565942A (en) * | 2018-03-01 | 2018-09-21 | 中电科芜湖钻石飞机制造有限公司 | Driving motor energy recycle device |
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