CN107707158A - A kind of frequency converter synthetical restraint system and its method of work - Google Patents
A kind of frequency converter synthetical restraint system and its method of work Download PDFInfo
- Publication number
- CN107707158A CN107707158A CN201711032510.7A CN201711032510A CN107707158A CN 107707158 A CN107707158 A CN 107707158A CN 201711032510 A CN201711032510 A CN 201711032510A CN 107707158 A CN107707158 A CN 107707158A
- Authority
- CN
- China
- Prior art keywords
- frequency converter
- braking
- synthetical restraint
- motor
- restraint system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
- H02P25/024—Synchronous motors controlled by supply frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The present invention is a kind of frequency converter synthetical restraint system and its method of work, it is characterised in that：The frequency converter synthetical restraint system includes frequency converter and AC brake unit, the output end and motor connection of the frequency converter, and the AC brake unit is connected to the output end of frequency converter；During motor braking, the AC brake unit and frequency converter cooperate, while or timesharing generation braking moment；Frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：AC brake pattern, synthetical restraint pattern and frequency conversion braking mode, when frequency converter synthetical restraint system is in AC brake pattern, the AC brake unit produces braking moment, and the frequency converter does not produce braking moment；When frequency converter synthetical restraint system is in synthetical restraint pattern, the AC brake unit and frequency converter produce braking moment；When frequency converter synthetical restraint system is in frequency conversion braking mode, frequency converter produces braking moment, and AC brake unit does not produce braking moment.
Description
Technical field
The present invention relates to a kind of frequency converter brake system and its method of work, particularly discloses a kind of frequency converter synthetical restraint
System and its method of work, applied to motor frequency conversion Qu Donglingyu.
Background technology
During using transducer drive motor, if motor needs fast braking, currently used scheme has two kinds：Scheme 1 is adopted
Fast braking is realized with frequency converter, such as in the DC side increase copped wave braking of frequency converter or using Active Front End rectification；Side
Case 2 connects alternating-current switch and resistance in motor side, is generally used for the braking of synchronous motor, closes alternating-current switch during motor braking
On, resistance is put into, motor is in generating state, is realized and braked by resistance consumption energy, when motor is excitation magnetic synchronization motor
When, also fast braking can be realized so as to the power for controlling AC resistance to absorb by controlled motor terminal voltage.Both schemes are each
There are advantage and disadvantage：Scheme 1 can realize that invariable power is braked in whole down speeding procedure, when motor speed is relatively low, still can carry
For enough braking moments, but scheme 1 according to Active Front End rectification, then system complex, cost are higher；Cut according to direct current
Ripple is braked, then energy consumption is larger, in addition, when frequency converter does not have the dc bus concentrated, such as the frequency conversion that cells cascaded multilevel is topological
Device, then need to increase DC chopped-wave braking on each power cell, in the application scenario of high-power braking, cause power list
Meta structure is complicated, without practicality.Scheme 2 is using the AC resistance braking concentrated, it is not necessary to and frequency converter additionally increases device,
System architecture is simple, and suitable for all frequency converter topologys, but the braking moment of scheme 2 is directly related with motor terminal voltage,
And motor terminal voltage is relevant with motor speed, when motor speed is relatively low, it is impossible to provide enough braking moments, deceleration time is difficult
To ensure.
The content of the invention
It is an object of the invention to overcome problems of the prior art, disclose a kind of frequency converter synthetical restraint system and
Its method of work, two kinds of traditional transducer drive motor braking modes are combined, avoid two kinds of modes of braking each
The shortcomings that, the advantages of having had two kinds of modes of braking concurrently, go for all frequency converters topologys, the frequency converter that is particularly suitable for use in does not have
Dc bus is concentrated to need the application scenario of high-power braking again, suitable for asynchronous machine and synchronous motor.
What the present invention was realized in：A kind of method of work of frequency converter synthetical restraint system, it is characterised in that：The change
Frequency device synthetical restraint system includes frequency converter and AC brake unit, the output end and motor connection of the frequency converter, the friendship
Stream brake unit is connected to the output end of frequency converter, and the frequency converter is three-phase voltage source type frequency converter, including be sequentially connected
Rectification unit, DC component unit and inversion unit；The AC brake unit includes connected alternating-current switch and AC brake
Resistance, alternating-current switch and the AC brake resistance is three-phase, and the alternating-current switch after AC brake resistant series with being connected
To the output end of the frequency converter, when the AC brake unit is run, the alternating-current switch closure, the alternating-current switch disconnects
When, the AC brake unit is not run；During motor braking, the AC brake unit and frequency converter cooperate, together
When or timesharing produce braking moment；The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：Hand over
Flow braking mode, synthetical restraint pattern and frequency conversion braking mode；The frequency converter synthetical restraint system is in AC brake pattern
When, the AC brake unit produces braking moment, the alternating-current switch closure of AC brake unit, and the frequency converter does not produce system
Dynamic torque；When the frequency converter synthetical restraint system is in synthetical restraint pattern, the AC brake unit and frequency converter are located
In running status, produce braking moment, the alternating-current switch closure of AC brake unit；The frequency converter synthetical restraint system is in
During frequency conversion braking mode, the frequency converter is in running status, produces braking moment, the alternating-current switch of the AC brake unit
Disconnect, AC brake unit does not run, do not produce braking moment.
When the frequency converter synthetical restraint system is in synthetical restraint pattern, the alternating-current switch of the AC brake unit closes
Close, the frequency converter produces braking moment, and frequency converter is simultaneously by controlling the terminal voltage of the motor to control the AC brake
Unit also produces braking moment.
When the frequency converter synthetical restraint system is in AC brake pattern, the alternating-current switch of the AC brake unit closes
Close, the frequency converter is by controlled motor exciting current controlled motor terminal voltage, so as to control the AC brake unit to produce
Braking moment, the frequency converter does not produce driving torque or the frequency converter, and controlled motor torque current produces driving turn simultaneously
Square, frequency converter do not produce braking moment, and driving torque caused by the frequency converter, which is less than caused by the AC brake unit, to be made
Dynamic torque, frequency converter synthetical restraint system output braking moment.
The frequency converter synthetical restraint system comprises at least synthetical restraint pattern or the change during motor braking
Frequency device synthetical restraint system only includes AC brake pattern and frequency conversion braking mode during motor braking.
During motor braking, when motor speed is more than rotary speed threshold value n1, the frequency converter synthetical restraint system fortune
Row is in AC brake pattern；When motor speed is less than rotary speed threshold value n2, the frequency converter synthetical restraint system operation is in frequency conversion
Braking mode；When motor speed is between rotary speed threshold value n1 and rotary speed threshold value n2, the frequency converter synthetical restraint system fortune
Row is in synthetical restraint pattern；The rotary speed threshold value n1 is more than or equal to the rotary speed threshold value n2.
In the simple application of the frequency converter synthetical restraint system, it can not have to judge motor speed, motor braking mistake
The system of frequency converter synthetical restraint described in journey runs on synthetical restraint pattern all the time.
The difference configured according to the rectification unit and DC component unit, the frequency converter are realized by different modes
Frequency converter braking function.
（1）The rectification unit of the frequency converter uses diode rectification unit, and the DC component unit stores up including direct current
Can electric capacity, DC injection braking resistance, dc switch, after the dc switch and DC injection braking resistant series with DC energy storage electricity
Hold parallel connection, the dc switch is electronic switch or mechanical switch；The frequency converter synthetical restraint system is in motor braking process
In have three kinds of mode of operations：AC brake pattern, synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system
When system is in frequency conversion braking mode and synthetical restraint pattern, the output current of frequency converter causes inverter output terminal to absorb energy
Amount, the DC bus-bar voltage of the frequency converter are more than commutating voltage, and the diode of rectification unit is in cut-off state, the direct current
All the time closure or periodicity are closed switch, and motor kinetic energy is converted into the heat energy of DC injection braking resistance and dissipated, the frequency conversion
Device produces braking moment.
（2）The rectification unit of the frequency converter uses Active Front End rectification unit, and the DC component unit includes direct current
Storage capacitor；The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：It is AC brake pattern, comprehensive
Close braking mode and frequency conversion braking mode, the frequency converter synthetical restraint system are in frequency conversion braking mode and synthetical restraint pattern
When, the output current of frequency converter causes inverter output terminal to absorb energy, and the DC bus-bar voltage of the frequency converter is more than whole
Voltage is flowed, the Active Front End rectification unit is in energy feedback pattern, motor kinetic energy is converted into electric energy feedback to power network, institute
State frequency converter and produce braking moment.
（3）The rectification unit of the frequency converter uses diode rectification unit, and the DC component unit stores up including direct current
Can electric capacity；The frequency converter synthetical restraint system has three kinds of different situations during motor braking, is respectively：
The first：The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：AC brake pattern,
Synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system are in frequency conversion braking mode and synthetical restraint mould
During formula, the output current of frequency converter causes inverter output terminal to absorb energy, the energy and frequency conversion that inverter output terminal absorbs
Device loss balancing itself, make the DC bus-bar voltage of frequency converter stable so that diode is in cut-off state, while will not lead again
Cause dc bus overvoltage.
Second：The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：AC brake
Pattern, synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system are in frequency conversion braking mode and synthesis
During braking mode, the alternating voltage of the inversion unit output high frequency of the frequency converter, the Frequency Converter Control motor produces slip,
So as to produce braking moment.
The third：The frequency converter synthetical restraint system has two kinds of mode of operations during motor braking：AC brake
Pattern and frequency conversion braking mode, when the frequency converter synthetical restraint system is in frequency conversion braking mode, the AC brake unit
Alternating-current switch disconnect, the inversion unit of frequency converter output DC voltage, the Frequency Converter Control motor produces slip, from
And produce braking moment.
A kind of frequency converter synthetical restraint system, it is characterised in that：The frequency converter synthetical restraint system include frequency converter and
AC brake unit, the output end and motor connection of the frequency converter, the AC brake unit are connected to the output of frequency converter
End, the motor is asynchronous machine or synchronous motor, and the synchronous motor includes permagnetic synchronous motor and excitation magnetic synchronization motor, institute
It is simplex winding motor or double-winding motor to state motor；The frequency converter is three-phase voltage source type frequency converter, including be sequentially connected
Rectification unit, DC component unit and inversion unit, the rectification unit are diode rectification unit or Active Front End rectification list
Member, rectification unit are used to grid ac voltage being converted into DC voltage；The DC component unit include DC energy storage electric capacity,
DC injection braking resistance, dc switch, the dc switch is in parallel with the DC energy storage electric capacity with after DC injection braking resistant series,
The dc switch is electronic switch or mechanical switch；It is that frequency and amplitude can that the inversion unit, which is used for DC voltage conversion,
The alternating voltage of change, the output end of inversion unit connect the motor, AC brake unit respectively；The AC brake unit bag
Connected alternating-current switch and AC brake resistance are included, alternating-current switch and the AC brake resistance is three-phase, and the exchange is opened
The output end with being connected to the frequency converter after AC brake resistant series is closed, alternating-current switch is contactor or breaker.
When the motor is double-winding motor, the often set winding of double-winding motor is connected with a set of frequency converter synthesis
Brakes, two sets of frequency converter synthetical restraint systems include frequency converter and AC brake unit, the output end of two frequency converters
Double-winding motor is connected respectively, and two AC brake units are respectively connecting to the output end of each self-corresponding frequency converter.
The beneficial effects of the invention are as follows：
1）The present invention combines two kinds of traditional transducer drive motor braking modes, by configuring suitable AC brake
Resistance and frequency converter, enough braking moments can be provided in whole braking procedure, ensure deceleration time, can entirely drop
Realize that invariable power is braked during speed, when motor speed is relatively low, still can provide enough braking moments, of the invention is
Unite simple in construction, reliable and stable.
2）Present invention may apply to all frequency converters topology, the frequency converter that is particularly suitable for use in does not concentrate dc bus to need again
The application scenario of high-power braking is wanted, the present invention is applied to asynchronous machine and synchronous motor.
Brief description of the drawings
Fig. 1 is the frame structure schematic diagram of the present invention.
Fig. 2 is the frame structure schematic diagram that the present invention uses double-winding motor.
Fig. 3 is the frame structure schematic diagram of frequency converter of the present invention.
Fig. 4 is the frame structure schematic diagram of AC brake unit of the present invention.
Fig. 5 is the rectification unit of frequency converter of the present invention and the frame structure schematic diagram of DC component unit embodiment one.
Fig. 6 is the rectification unit of frequency converter of the present invention and the frame structure schematic diagram of DC component unit embodiment two.
Fig. 7 is the rectification unit of frequency converter of the present invention and the frame structure schematic diagram of DC component unit embodiment three.
In figure：1st, frequency converter；11st, rectification unit；12nd, DC component unit；121st, DC energy storage electric capacity； 122、
Dc switch；123rd, DC injection braking resistance；13rd, inversion unit；
2nd, AC brake unit；21st, alternating-current switch；22nd, AC brake resistance；
3rd, motor.
Embodiment
With reference to the accompanying drawings 1~4, a kind of frequency converter synthetical restraint system of the present invention, including frequency converter 1 and AC brake unit 2,
The output end of the frequency converter 1 is connected with motor 3, and the AC brake unit 2 is connected to the output end of frequency converter 1, the electricity
Machine 3 is asynchronous machine or synchronous motor, and the synchronous motor includes permagnetic synchronous motor and excitation magnetic synchronization motor, the motor 3
For simplex winding motor or double-winding motor；The frequency converter 1 is three-phase voltage source type frequency converter, including the rectification list being sequentially connected
Member 11, DC component unit 12 and inversion unit 13；The AC brake unit 2 includes connected alternating-current switch 21 and AC system
Dynamic resistance 22.
When the motor 3 is double-winding motor, it is comprehensive that the often set winding of double-winding motor is connected with a set of frequency converter
Close brakes, two sets of frequency converter synthetical restraint systems include frequency converter 1 and AC brake unit 2, two frequency converters it is defeated
Go out end and connect double-winding motor respectively, two AC brake units are respectively connecting to the output end of each self-corresponding frequency converter.
The alternating-current switch 21 and AC brake resistance 22 are three-phase, the alternating-current switch 21 and AC brake resistance 22
It is connected to the output end of the frequency converter 1 after series connection, alternating-current switch 21 is contactor, breaker or other electronic switches, described
AC brake resistance 22 can set overload, overheat or other protections as needed；When the AC brake unit 2 is run, institute
State alternating-current switch 21 to close, when the alternating-current switch 21 disconnects, the AC brake unit 2 is not run.
The rectification unit 11 is diode rectification unit or Active Front End rectification unit, and rectification unit 11 is used for power network
Alternating voltage is converted into DC voltage；The DC component unit 12 include DC energy storage electric capacity 121, DC injection braking resistance 123,
Dc switch 122, the dc switch 122 is in parallel with the DC energy storage electric capacity 121 after being connected with DC injection braking resistance 123,
The dc switch 122 is electronic switch or mechanical switch；The inversion unit 13 be used for by DC voltage conversion be frequency and
The variable alternating voltage of amplitude, the output end of inversion unit 13 connect the motor 3, AC brake unit 2 respectively.
The rectification unit 11 is made up of diode or other power electronic devices such as IGBT, IGCT, IEGT, SCR etc.
Controllable, half control can not control rectifying circuit.
The method of work of the frequency converter synthetical restraint system is as follows：During motor braking, the AC brake unit 2
Cooperated with frequency converter 1, while or timesharing generation braking moment；The frequency converter synthetical restraint system is in motor braking process
In have three kinds of mode of operations：AC brake pattern, synthetical restraint pattern and frequency conversion braking mode；The frequency converter synthetical restraint system
When system is in AC brake pattern, the AC brake unit 2 produces braking moment, the alternating-current switch 21 of AC brake unit 2
Closure, the frequency converter 1 do not produce braking moment；It is described when the frequency converter synthetical restraint system is in synthetical restraint pattern
AC brake unit 2 and frequency converter 1 are in running status, produce braking moment, and the alternating-current switch 21 of AC brake unit 2 closes
Close；When the frequency converter synthetical restraint system is in frequency conversion braking mode, the frequency converter 1 is in running status, produces braking
Torque, the alternating-current switch 21 of the AC brake unit 2 disconnect, and AC brake unit 2 does not run, do not produce braking moment.
When the frequency converter synthetical restraint system is in synthetical restraint pattern, the alternating-current switch of the AC brake unit 2
21 closures, the AC brake unit 2 and frequency converter 1 are in running status, and the Controlling model of the frequency converter 1 is motor 3
The model in parallel with AC brake unit 2, the frequency converter 1 produce braking moment, and frequency converter 1 is simultaneously by controlling the motor
3 terminal voltage controls the AC brake unit 2 also to produce braking moment.
When the frequency converter synthetical restraint system is in AC brake pattern, the alternating-current switch of the AC brake unit 2
21 closures, when the motor 3 is asynchronous machine, the frequency converter 1 controls electricity by the Stator energization current of controlled motor 3
The terminal voltage of machine 3, so as to control the AC brake unit 2 to produce braking moment；When the motor 3 is excitation magnetic synchronization motor
When, the frequency converter 1 by the rotor excitation current of excitation cubicle controlled motor 3 come the terminal voltage of controlled motor 3, so as to control
State AC brake unit 2 and produce braking moment, the frequency converter 1 does not produce driving torque or the frequency converter 1 while controls electricity
Machine torque current produces driving torque, and frequency converter 1 does not produce braking moment, and driving torque caused by the frequency converter 1 is less than institute
State braking moment caused by AC brake unit 2, frequency converter synthetical restraint system output braking moment.
The frequency converter synthetical restraint system comprises at least synthetical restraint pattern or the change during motor braking
Frequency device synthetical restraint system only includes AC brake pattern and frequency conversion braking mode during motor braking.
During motor braking, when motor speed is more than rotary speed threshold value n1, the frequency converter synthetical restraint system fortune
Row is in AC brake pattern；When motor speed is less than rotary speed threshold value n2, the frequency converter synthetical restraint system operation is in frequency conversion
Braking mode；When motor speed is between rotary speed threshold value n1 and rotary speed threshold value n2, the frequency converter synthetical restraint system fortune
Row is in synthetical restraint pattern；The rotary speed threshold value n1 is more than or equal to the rotary speed threshold value n2.
In the simple application of the frequency converter synthetical restraint system, it can not have to judge motor speed, motor braking mistake
The system of frequency converter synthetical restraint described in journey runs on synthetical restraint pattern all the time.
The difference configured according to the rectification unit 11 and DC component unit 12, the frequency converter 1 pass through different sides
Formula realizes frequency converter braking function.
Below by specific embodiment, the present invention is further elaborated：
Embodiment one：
With reference to the accompanying drawings 5, the rectification unit 11 of frequency converter 1 of the present invention uses diode rectification unit, and diode rectification unit includes 6
Individual diode, the DC component unit 12 include DC energy storage electric capacity 121, DC injection braking resistance 123, dc switch 122, institute
State in parallel with the DC energy storage electric capacity 121 after dc switch 122 is connected with DC injection braking resistance 123, the dc switch 122
For electronic switch or mechanical switch；The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：Hand over
Stream braking mode, synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system are in frequency conversion braking mode
During with synthetical restraint pattern, the output current of frequency converter 1 cause the output end of frequency converter 1 absorb energy, the frequency converter 1 it is straight
Stream busbar voltage is more than commutating voltage, and the diode of rectification unit 11 is in cut-off state, and the dc switch 122 closes all the time
Or periodically close, motor kinetic energy is converted into the heat energy of DC injection braking resistance 123 and dissipated, the frequency converter 1 produces system
Dynamic torque.
Embodiment two：
With reference to the accompanying drawings 6, the rectification unit 11 of frequency converter 1 of the present invention uses Active Front End rectification unit, Active Front End rectification unit
Including 6 IGBT, the DC component unit 12 includes DC energy storage electric capacity 121；The frequency converter synthetical restraint system is in electricity
There are three kinds of mode of operations during mechanism is dynamic：AC brake pattern, synthetical restraint pattern and frequency conversion braking mode, the frequency converter
When synthetical restraint system is in frequency conversion braking mode and synthetical restraint pattern, the output current of frequency converter 1 make it that frequency converter 1 is defeated
Go out end and absorb energy, the DC bus-bar voltage of the frequency converter 1 is more than commutating voltage, and the Active Front End rectification unit is in energy
Feedback pattern is measured, motor kinetic energy is converted into electric energy feedback to power network, the frequency converter 1 produces braking moment.
Embodiment three：
With reference to the accompanying drawings 7, the rectification unit 11 of frequency converter 1 of the present invention uses diode rectification unit, and diode rectification unit includes 6
Individual diode, the DC component unit 12 include DC energy storage electric capacity 121.
The frequency converter synthetical restraint system has three kinds of different situations during motor braking, is respectively：
The first：The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：AC brake pattern,
Synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system are in frequency conversion braking mode and synthetical restraint mould
During formula, the output current of frequency converter 1 causes the output end of frequency converter 1 to absorb energy, the energy and change that the output end of frequency converter 1 absorbs
The loss balancing of frequency device 1 itself, make the DC bus-bar voltage of frequency converter 1 stable so that diode is in cut-off state, while again not
Dc bus can be caused over-pressed.
Second：The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：AC brake
Pattern, synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system are in frequency conversion braking mode and synthesis
During braking mode, the inversion unit 13 of the frequency converter 1 exports the alternating voltage of high frequency, and the controlled motor 3 of frequency converter 1 produces
Slip, so as to produce braking moment.
The third：The frequency converter synthetical restraint system has two kinds of mode of operations during motor braking：AC brake
Pattern and frequency conversion braking mode, when the frequency converter synthetical restraint system is in frequency conversion braking mode, the AC brake unit 2
Alternating-current switch 21 disconnect, the inversion unit 13 of the frequency converter 1 exports DC voltage, and the controlled motor 3 of frequency converter 1 produces
Slip, so as to produce braking moment.
Above-mentioned specific embodiment is only presently preferred embodiments of the present invention, for being explained in detail to the present invention, and is not
Limitation of the present invention, one of ordinary skill in the art obviously can be according to present disclosures to embodiment
Make various equivalent modifications, variations and alternatives, these equivalent modifications, variations and alternatives should all belong to protection scope of the present invention.
Protection scope of the present invention is defined by the description of this case claims.
Claims (14)
- A kind of 1. method of work of frequency converter synthetical restraint system, it is characterised in that：The frequency converter synthetical restraint system includes Frequency converter and AC brake unit, the output end and motor connection of the frequency converter, the AC brake unit are connected to frequency conversion The output end of device, the frequency converter are three-phase voltage source type frequency converter, including rectification unit, the DC component unit being sequentially connected And inversion unit；The AC brake unit includes connected alternating-current switch and AC brake resistance, the alternating-current switch and friendship It is three-phase to flow braking resistor, the alternating-current switch and the output end that the frequency converter is connected to after AC brake resistant series, During the AC brake unit operation, the alternating-current switch closure, when the alternating-current switch disconnects, the AC brake unit is not Operation；During motor braking, the AC brake unit and frequency converter cooperate, while or timesharing generation braking moment； The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：AC brake pattern, synthetical restraint mould Formula and frequency conversion braking mode；When the frequency converter synthetical restraint system is in AC brake pattern, the AC brake unit production Raw braking moment, the alternating-current switch closure of AC brake unit, the frequency converter do not produce braking moment；The frequency converter synthesis When brakes is in synthetical restraint pattern, the AC brake unit and frequency converter are in running status, produce braking turn Square, the alternating-current switch closure of AC brake unit；When the frequency converter synthetical restraint system is in frequency conversion braking mode, the change Frequency device is in running status, produces braking moment, and the alternating-current switch of the AC brake unit is disconnected, and AC brake unit is not transported Row, do not produce braking moment.
- 2. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency converter When synthetical restraint system is in synthetical restraint pattern, the alternating-current switch closure of the AC brake unit, the frequency converter produces Braking moment, frequency converter are turned by controlling the terminal voltage of the motor to control the AC brake unit also to produce braking simultaneously Square.
- 3. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency converter When synthetical restraint system is in AC brake pattern, the alternating-current switch closure of the AC brake unit, the frequency converter passes through Controlled motor exciting current controlled motor terminal voltage, so as to control the AC brake unit to produce braking moment, the frequency conversion Device does not produce driving torque or the frequency converter, and controlled motor torque current produces driving torque simultaneously, and frequency converter does not produce braking Torque, driving torque caused by the frequency converter are less than braking moment caused by the AC brake unit, frequency converter synthesis system Dynamic system output braking moment.
- 4. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency converter Synthetical restraint system comprises at least synthetical restraint pattern during motor braking.
- 5. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency converter Synthetical restraint system only includes AC brake pattern and frequency conversion braking mode during motor braking.
- 6. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：In motor braking During, when motor speed is more than rotary speed threshold value n1, the frequency converter synthetical restraint system operation is in AC brake pattern；When When motor speed is less than rotary speed threshold value n2, the frequency converter synthetical restraint system operation is in frequency conversion braking mode；Work as motor speed When between rotary speed threshold value n1 and rotary speed threshold value n2, the frequency converter synthetical restraint system operation is in synthetical restraint pattern；Institute State rotary speed threshold value n1 and be more than or equal to the rotary speed threshold value n2.
- 7. the method for work of the frequency converter synthetical restraint system according to claim 6, it is characterised in that：In the frequency conversion In the simple application of device synthetical restraint system, without judging motor speed, the frequency converter synthetical restraint during motor braking System runs on synthetical restraint pattern all the time.
- 8. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency converter Rectification unit use diode rectification unit, the DC component unit includes DC energy storage electric capacity, DC injection braking resistance, straight Stream switch, the dc switch is in parallel with the DC energy storage electric capacity with after DC injection braking resistant series, and the dc switch is Electronic switch or mechanical switch；The frequency converter synthetical restraint system has three kinds of mode of operations during motor braking：Exchange Braking mode, synthetical restraint pattern and frequency conversion braking mode, the frequency converter synthetical restraint system be in frequency conversion braking mode and During synthetical restraint pattern, the output current of frequency converter causes inverter output terminal to absorb energy, and the direct current of the frequency converter is female Line voltage is more than commutating voltage, and the diode of rectification unit is in cut-off state, and the dc switch closes all the time or periodicity Closure, is converted to the heat energy of DC injection braking resistance by motor kinetic energy and dissipates, and the frequency converter produces braking moment.
- 9. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency converter Rectification unit use Active Front End rectification unit, the DC component unit includes DC energy storage electric capacity；The frequency converter is comprehensive Close brakes has three kinds of mode of operations during motor braking：AC brake pattern, synthetical restraint pattern and frequency conversion braking Pattern, when the frequency converter synthetical restraint system is in frequency conversion braking mode and synthetical restraint pattern, the frequency converter output electricity Stream causes inverter output terminal to absorb energy, and the DC bus-bar voltage of the frequency converter is more than commutating voltage, the Active Front End Rectification unit is in energy feedback pattern, motor kinetic energy is converted into electric energy feedback to power network, the frequency converter produces braking and turned Square.
- 10. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency conversion The rectification unit of device uses diode rectification unit, and the DC component unit includes DC energy storage electric capacity；The frequency converter is comprehensive Close brakes has three kinds of mode of operations during motor braking：AC brake pattern, synthetical restraint pattern and frequency conversion braking Pattern, when the frequency converter synthetical restraint system is in frequency conversion braking mode and synthetical restraint pattern, the frequency converter output electricity Stream causes inverter output terminal to absorb energy, the energy and frequency converter loss balancing itself that inverter output terminal absorbs, makes frequency conversion The DC bus-bar voltage of device is stable so that diode is in cut-off state, while will not cause dc bus over-pressed again.
- 11. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency conversion The rectification unit of device uses diode rectification unit, and the DC component unit includes DC energy storage electric capacity；The frequency converter is comprehensive Close brakes has three kinds of mode of operations during motor braking：AC brake pattern, synthetical restraint pattern and frequency conversion braking Pattern, when the frequency converter synthetical restraint system is in frequency conversion braking mode and synthetical restraint pattern, the inversion of the frequency converter Unit exports the alternating voltage of high frequency, and the Frequency Converter Control motor produces slip, so as to produce braking moment.
- 12. the method for work of the frequency converter synthetical restraint system according to claim 1, it is characterised in that：The frequency conversion The rectification unit of device uses diode rectification unit, and the DC component unit includes DC energy storage electric capacity；The frequency converter is comprehensive Close brakes has two kinds of mode of operations during motor braking：AC brake pattern and frequency conversion braking mode, the frequency conversion When device synthetical restraint system is in frequency conversion braking mode, the alternating-current switch of the AC brake unit disconnects, the frequency converter Inversion unit exports DC voltage, and the Frequency Converter Control motor produces slip, so as to produce braking moment.
- A kind of 13. change using the method for work of frequency converter synthetical restraint system described in any one in claim 1~12 Frequency device synthetical restraint system, it is characterised in that：The frequency converter synthetical restraint system includes frequency converter and AC brake unit, institute The output end and motor connection of frequency converter are stated, the AC brake unit is connected to the output end of frequency converter, and the motor is different It is simplex winding motor or double-winding motor to walk motor or synchronous motor, the motor；The frequency converter becomes for three-phase voltage source type Frequency device, including rectification unit, DC component unit and the inversion unit being sequentially connected, the rectification unit are diode rectification list Member or Active Front End rectification unit, rectification unit are used to grid ac voltage being converted into DC voltage；The DC component list Member includes DC energy storage electric capacity, DC injection braking resistance, dc switch, after the dc switch and DC injection braking resistant series with institute The parallel connection of DC energy storage electric capacity is stated, the dc switch is electronic switch or mechanical switch；The inversion unit is used for direct current Buckling is changed to frequency and the variable alternating voltage of amplitude, and the output end of inversion unit connects the motor, AC brake list respectively Member；The AC brake unit includes connected alternating-current switch and AC brake resistance, alternating-current switch and the AC brake electricity Resistance is three-phase, the alternating-current switch and the output end that the frequency converter is connected to after AC brake resistant series, alternating-current switch For contactor or breaker.
- A kind of 14. frequency converter synthetical restraint system according to claim 13, it is characterised in that：The motor is double wrap During group motor, the often set winding of double-winding motor is connected with a set of frequency converter synthetical restraint system, and two sets of frequency converters are comprehensive Closing brakes includes frequency converter and AC brake unit, and the output ends of two frequency converters connects double-winding motor respectively, and two Individual AC brake unit is respectively connecting to the output end of each self-corresponding frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711032510.7A CN107707158B (en) | 2017-10-30 | 2017-10-30 | Frequency converter comprehensive braking system and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711032510.7A CN107707158B (en) | 2017-10-30 | 2017-10-30 | Frequency converter comprehensive braking system and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107707158A true CN107707158A (en) | 2018-02-16 |
| CN107707158B CN107707158B (en) | 2020-04-24 |
Family
ID=61176792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711032510.7A Active CN107707158B (en) | 2017-10-30 | 2017-10-30 | Frequency converter comprehensive braking system and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107707158B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988736A (en) * | 2018-07-06 | 2018-12-11 | 珠海格力电器股份有限公司 | A kind of servo-system and its real-time control method of repid discharge |
| CN109687395A (en) * | 2018-11-27 | 2019-04-26 | 河海大学 | A kind of magnetic suspension motor power-off protection apparatus and method based on electric energy feedback |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101380901A (en) * | 2007-09-04 | 2009-03-11 | 阿尔斯通运输公司 | Secure electric braking device with permanent magnet motor and braking torque regulation |
| CN101635519A (en) * | 2009-08-23 | 2010-01-27 | 山西科达自控工程技术有限公司 | Power unit with brake function for unit cascaded high-voltage frequency converter |
| CN201393199Y (en) * | 2009-03-17 | 2010-01-27 | 大庆东达节能技术开发服务有限公司 | Screw pump motor straight-pulling device with electromagnetism containment and anti-reversion control |
| CN201458456U (en) * | 2009-07-08 | 2010-05-12 | 富士工业(青岛)电梯制造有限公司 | Elevator by utilizing wind energy, solar energy and electric energy for recovery |
| CN201461396U (en) * | 2009-06-08 | 2010-05-12 | 杭州思佳电气技术有限公司 | Screw pump controller |
| CN202261044U (en) * | 2011-09-07 | 2012-05-30 | 山东深川电气科技有限公司 | Special frequency converter for ball grinding mill |
| CN102642775A (en) * | 2012-05-23 | 2012-08-22 | 中建一局集团第三建筑有限公司 | Device and method for controlling slewing mechanism of tower crane |
-
2017
- 2017-10-30 CN CN201711032510.7A patent/CN107707158B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101380901A (en) * | 2007-09-04 | 2009-03-11 | 阿尔斯通运输公司 | Secure electric braking device with permanent magnet motor and braking torque regulation |
| CN201393199Y (en) * | 2009-03-17 | 2010-01-27 | 大庆东达节能技术开发服务有限公司 | Screw pump motor straight-pulling device with electromagnetism containment and anti-reversion control |
| CN201461396U (en) * | 2009-06-08 | 2010-05-12 | 杭州思佳电气技术有限公司 | Screw pump controller |
| CN201458456U (en) * | 2009-07-08 | 2010-05-12 | 富士工业(青岛)电梯制造有限公司 | Elevator by utilizing wind energy, solar energy and electric energy for recovery |
| CN101635519A (en) * | 2009-08-23 | 2010-01-27 | 山西科达自控工程技术有限公司 | Power unit with brake function for unit cascaded high-voltage frequency converter |
| CN202261044U (en) * | 2011-09-07 | 2012-05-30 | 山东深川电气科技有限公司 | Special frequency converter for ball grinding mill |
| CN102642775A (en) * | 2012-05-23 | 2012-08-22 | 中建一局集团第三建筑有限公司 | Device and method for controlling slewing mechanism of tower crane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988736A (en) * | 2018-07-06 | 2018-12-11 | 珠海格力电器股份有限公司 | A kind of servo-system and its real-time control method of repid discharge |
| CN109687395A (en) * | 2018-11-27 | 2019-04-26 | 河海大学 | A kind of magnetic suspension motor power-off protection apparatus and method based on electric energy feedback |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107707158B (en) | 2020-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gan et al. | New integrated multilevel converter for switched reluctance motor drives in plug-in hybrid electric vehicles with flexible energy conversion | |
| JP7110099B2 (en) | Controller for inductive loads with one or more inductive windings | |
| Hu et al. | Split converter-fed SRM drive for flexible charging in EV/HEV applications | |
| Haghbin et al. | Grid-connected integrated battery chargers in vehicle applications: Review and new solution | |
| CN103368478B (en) | For the control device of electric rotating machine | |
| CN104167975A (en) | Multiphase permanent magnet motor speed regulating system based on phase switching and speed regulating method thereof | |
| WO2019071360A1 (en) | On-board bidirectional ac fast charger for electric vehicles | |
| CN103051281A (en) | High-performance four-quadrant frequency converter | |
| CN105048900A (en) | Frequency multiplication chopping control circuit for double-winding high-speed brushless DC motor and winding switching control method | |
| CN101873097A (en) | Control method for implementing electronic commutation and four-quadrant operation of series excited motor, and device thereof | |
| CN102709945A (en) | Energy-storage wind power generation system with squirrel-cage generator | |
| Sam et al. | Bidirectional integrated on-board chargers for electric vehicles—a review | |
| CN107707158A (en) | A kind of frequency converter synthetical restraint system and its method of work | |
| CN203637592U (en) | Driving device and vehicle | |
| CN103582999A (en) | Apparatus for controlling rotor current in a wound-rotor type induction motor | |
| CN204836014U (en) | A tandem type interchange exciting arrangement for variable -ratio water -storage power generation system | |
| Shchur et al. | Open-end winding dual three-phase BLDC motor drive system with integrated hybrid battery-supercapacitor energy storage for electric vehicle | |
| CN204334399U (en) | The operation control system of brushless ac compound rectifier excitation brshless DC motor | |
| CN104378034B (en) | The operation control system of brushless ac compound rectifier excitation brshless DC motor | |
| CN202841050U (en) | Cascaded high-voltage inverter speed regulating system with energy feedback function | |
| CN103754119B (en) | The straight electric locomotive brake unit of a kind of friendship | |
| Shah et al. | Integrated power converter with G2V and V2G capabilities for 4-phase SRM drive based EV application | |
| CN203071823U (en) | A cascaded high-voltage frequency converter formed by power units connected in parallel | |
| CN201869080U (en) | Flywheel energy storage motor device with changeable power supply structure | |
| RU199635U1 (en) | Control system for multi-motor drives of production lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221115 Address after: Room 708, Block C, No. 699 Zhongke Road, Pudong New Area, Shanghai, 201210 Patentee after: Shanghai Draver Software Co.,Ltd. Address before: 201210 room 702, block B, 699 Zhong Ke Road, Pudong New Area, Shanghai. Patentee before: SHANGHAI NENGCHUAN SOFTWARE CO.,LTD. |