CN207069948U - A kind of special new braking device of machine of kowtowing - Google Patents
A kind of special new braking device of machine of kowtowing Download PDFInfo
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- CN207069948U CN207069948U CN201721008531.0U CN201721008531U CN207069948U CN 207069948 U CN207069948 U CN 207069948U CN 201721008531 U CN201721008531 U CN 201721008531U CN 207069948 U CN207069948 U CN 207069948U
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- commutation diode
- diode
- braking
- control unit
- positive pole
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Abstract
The problem of the utility model discloses a kind of special new braking device of machine of kowtowing, motor actual speed is higher than synchronizing speed in frequency conversion speed-adjusting system solving in the prior art, and system is in regenerative braking state fragile frequency converter.The device is made up of switch power module and brake module connection；The switch power module includes：Rectifier bridge, for single-phase alternating current to be converted to the direct current of pulsation；Charhing unit, it is connected with the rectifier bridge；Filter unit, it is connected with the charhing unit；Switching Power Supply control unit, it is connected with the filter unit, the break-make for controlling switch pipe；The brake module includes：Brak control unit, for controlling the unlatching of braking circuit；Driver element is braked, is connected with the brak control unit, for turning on the electric current of the braking circuit；Braking resistor, it is connected with the braking driver element.Using the utility model, the problem of frequency converter retro-speed is slow, braking moment is small effectively compensate for.
Description
Technical field
Machine field of kowtowing is the utility model is related to, more particularly to the new braking device that a kind of machine of kowtowing is special.
Background technology
At present, most important energy consumption equipment is oil pumper in being produced in China oil field, and beam pumping unit therein, i.e.,
" machine of kowtowing " being commonly called as is that each oil field uses at most.
In frequency conversion speed-adjusting system, the basic skills of reduction of speed is exactly to be realized by gradually reducing given frequency.Work as dragging
The inertia of system is larger, and the decline of the rotating speed of motor does not catch up with the decline of motor synchronous rotational speed, i.e., the actual speed of motor is than it
Synchronizing speed is high, and now motor will appear from negative torque, and system is in regenerative braking state.The kinetic energy of dragging system is fed back into change
On frequency device dc bus, DC bus-bar voltage is set constantly to increase, even up to dangerous stage (frequency converter damage etc.).
The content of the invention
The technical problems to be solved in the utility model purpose is to provide a kind of machine of kowtowing special new braking device, used
With solution, motor actual speed is higher than synchronizing speed in frequency conversion speed-adjusting system in the prior art, and system is in regenerative braking state
The problem of fragile frequency converter.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of special new braking device of machine of kowtowing, it is made up of switch power module and brake module connection；
The switch power module includes：
Rectifier bridge, for single-phase alternating current to be converted to the direct current of pulsation；
Charhing unit, it is connected with the rectifier bridge；
Filter unit, it is connected with the charhing unit；
Switching Power Supply control unit, it is connected with the filter unit, the break-make for controlling switch pipe；
The brake module includes：
Brak control unit, for controlling the unlatching of braking circuit；
Driver element is braked, is connected with the brak control unit, for turning on the electric current of the braking circuit；
Braking resistor, it is connected with the braking driver element.
Further, the rectifier bridge is by the first commutation diode, the second commutation diode, the 3rd commutation diode,
Four commutation diodes, the 5th commutation diode, the 6th commutation diode, the 7th commutation diode and the 8th commutation diode group
Into；
The negative pole of first commutation diode is connected with the negative pole of the 8th commutation diode；First rectification two
The positive pole of pole pipe is connected with the negative pole of second commutation diode；The positive pole of second commutation diode and the described 3rd whole
Flow the negative pole connection of diode；The positive pole of 3rd commutation diode is connected with the negative pole of the 4th commutation diode；Institute
The positive pole for stating the 4th commutation diode is connected with the positive pole of the 5th commutation diode；The negative pole of 5th commutation diode
It is connected with the positive pole of the 6th commutation diode；The negative pole of 6th commutation diode and the 7th commutation diode
Positive pole connects；The negative pole of 7th commutation diode is connected with the positive pole of the 8th commutation diode.
Further, the charhing unit is made up of the first thermistor and the second thermistor；
One end of first thermistor is connected with the negative pole of the 8th commutation diode；First thermistor
The other end be connected with one end of second thermistor；The other end of second thermistor connects with the filter unit
Connect.
Further, the filter unit is by the first electrochemical capacitor, the second electrochemical capacitor, first resistor and second resistance group
Into；
One end of first electrochemical capacitor simultaneously connects the other end of second thermistor, one end of the first resistor
And the Switching Power Supply control unit；The other end of second electrochemical capacitor and connect first electrochemical capacitor the other end,
One end of the first resistor and one end of the second resistance；The other end of second electrochemical capacitor and to connect the described 5th whole
Flow the positive pole of diode, the other end of the second resistance and the Switching Power Supply control unit.
Further, the braking driver element is by the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first diode and the second diode
Composition；
The drain electrode of first metal-oxide-semiconductor simultaneously connects the brak control unit, the negative pole of first diode；Described first
The source electrode of metal-oxide-semiconductor simultaneously connects the negative of the positive pole of first diode, the drain electrode of second metal-oxide-semiconductor and second diode
Pole；The source electrode of second metal-oxide-semiconductor simultaneously connects the brak control unit, the positive pole and frequency converter of second diode；It is described
The grid of second metal-oxide-semiconductor is connected with the brak control unit.
Further, one end of the braking resistor and the drain electrode of first metal-oxide-semiconductor and the frequency converter are connect；The system
The other end of dynamic resistance is connected with the grid of first metal-oxide-semiconductor.
The utility model has the following advantages compared with traditional technology：
Using the utility model, the problem of frequency converter retro-speed is slow, braking moment is small effectively compensate for.
Brief description of the drawings
Fig. 1 is a kind of special new braking device structure chart of machine of kowtowing of the utility model embodiment offer.
Embodiment
It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these embodiments.
The utility model embodiment provides a kind of special new braking device of machine of kowtowing, as shown in figure 1, by switch electricity
Source module 1 and the connection composition of brake module 2；
Switch power module 1 includes：
Rectifier bridge 10, for single-phase alternating current to be converted to the direct current of pulsation；
Charhing unit 20, it is connected with rectifier bridge 10；
Filter unit 30, it is connected with charhing unit 20；
Switching Power Supply control unit 40, with the filter unit 30, the break-make for controlling switch pipe；
Brake module 2 includes：
Brak control unit 21, for controlling the unlatching of braking circuit；
Driver element 22 is braked, is connected with brak control unit 21, for turning on the electric current of braking circuit；
Braking resistor 23, it is connected with braking driver element 22.
In the present embodiment, rectifier bridge 10 is by the first commutation diode 11, the second commutation diode 12, the 3rd commutation diode
13rd, the 4th commutation diode 14, the 5th commutation diode 15, the 6th commutation diode 16, the 7th commutation diode the 17, the 8th are whole
Stream diode 18 forms.
The negative pole of first commutation diode 11 is connected with the negative pole of the 8th commutation diode 18；First commutation diode 11
Positive pole is connected with the negative pole of the second commutation diode 12；The positive pole of second commutation diode 12 and bearing for the 3rd commutation diode 13
Pole connects；The positive pole of 3rd commutation diode 13 is connected with the negative pole of the 4th commutation diode 14；4th commutation diode 14
Positive pole is connected with the positive pole of the 5th commutation diode 15；The negative pole and the 6th commutation diode 16 of 5th commutation diode 15 are just
Pole connects；The negative pole of 6th commutation diode 16 is connected with the positive pole of the 7th commutation diode 17；7th commutation diode 17
Negative pole is connected with the positive pole of the 8th commutation diode 18.
In the present embodiment, charhing unit 20 is made up of the first thermistor 21 and the second thermistor 22.
One end of first thermistor 21 is connected with the negative pole of the 8th commutation diode 18；First thermistor 21 it is another
End is connected with one end of the second thermistor 22；The other end of second thermistor 22 is connected with filter unit 30.
In the present embodiment, filter unit 30 is by the first electrochemical capacitor 31, the second electrochemical capacitor 32, first resistor 33 and second
Resistance 34 forms.
One end of first electrochemical capacitor 31 simultaneously connects the other end of the second thermistor 22, one end of first resistor 33 and switch
Power control unit 40；One end of second electrochemical capacitor 32 and connect the other end of the first electrochemical capacitor 31, first resistor 33 it is another
One end and one end of second resistance 34；The other end of second electrochemical capacitor 32 simultaneously connects the positive pole of the 5th commutation diode 15, second
The other end and Switching Power Supply control unit 40 of resistance 34.
In the present embodiment, braking driver element 60 is by the first metal-oxide-semiconductor 61, the second metal-oxide-semiconductor 62, the first diode 63 and second
Diode 64 forms.
The drain electrode of first metal-oxide-semiconductor 61 simultaneously connects brak control unit 50, the negative pole of the first diode 63；First metal-oxide-semiconductor 61
Source electrode and the negative pole for connecing the positive pole of the first diode 63, the drain electrode of the second metal-oxide-semiconductor 62 and the second diode 64；Second metal-oxide-semiconductor 62
Source electrode and connect the positive pole and frequency converter 80 of brak control unit 50, the second diode 64；The grid of second metal-oxide-semiconductor 62 and braking
Control unit 50 connects.
In the present embodiment, one end of braking resistor 70 and drain electrode and the frequency converter 80 for connecing the first metal-oxide-semiconductor 61；Braking resistor 70
The other end be connected with the grid of the first metal-oxide-semiconductor 61.
The special new braking device of machine provided by the utility model of kowtowing, can be widely used in oil field machine industry.It is
The both positive and negative polarity of brake module is attempted by the dc bus both ends of frequency converter, monitors the size of DC bus-bar voltage in real time.The dress
Put overall appearance structure to design using integral type theory, compared to traditional mode, there is simple in construction, flexible for installation, maintenance
Conveniently, the characteristics of system compatibility is strong；The system that one plate both can be applied to 380V grades, 660V grades are can be applied to again
System, it is easy to production maintenance；More importantly the brake unit device is designed using devices at full hardware, and system response is rapid, and has
It is multinomial to cross the defencive functions such as thermal overload, frequency converter can be made to be in the operating voltage range of safety and run.
In terms of electrical design, the utility model uses two kinds of independent power supplys by the power supply and braking of system switching power supply
Major loop is separated, and control bus voltage is monitored in real time using the algorithm of devices at full hardware.Wherein, input supply switch electricity at binding post
The supply and AC electricity either direct current of source module 10, and the power supply for braking major loop upper module is by inversion part
Dc bus both ends provide.
In the present embodiment, switch power module 1 is by rectifier bridge 10, charhing unit 20, filter unit 30 and Switching Power Supply control
Unit 40 processed forms.Multichannel stabilized power source is provided for subordinate's circuit.
Wherein, rectifier bridge 10 is made up of eight discrete commutation diodes, and effect is that industrial-frequency alternating current is changed into arteries and veins
Dynamic direct current uses for subordinate's circuit.
Charhing unit 20 uses two NTC type thermistors, is responsible for upper electricity buffering.
Filter unit 30 is formed using two electrochemical capacitors, is responsible for the direct current of pulsation becoming gentle and stably.
Switching Power Supply control unit 40 controls pwm pulse by 3884 chips according to the signal of voltage stabilizing calibration circuit feedback,
So as to the break-make of controlling switch pipe, stable system voltage is produced with this.
In the present embodiment, brake module 2 is made up of brak control unit 50, braking driver element 60 and braking resistor.
The state that power supply, operation, the failure functional indicator light of power supply plate are run by light-guiding pillar come display system.
Wherein, multi-functional input/output section includes one group of normally closed normally opened relay contact, and one group of online control
The interface of input and output processed come complete with different system to docking extension.
Specifically, realization principle is：It is discrete whole by eight after L1, L2 input single-phase alternating current or DC voltage
Flow the rectifier bridge 10 that diode is formed and carry out rectification, alternating current is converted to the direct current of pulsation, then give by charhing unit 20
Filter unit 30 is given to charge, unit 30 to be filtered is filled to after Switching Power Supply oscillation starting points, and Switching Power Supply control unit 40 passes through
Control PWM mode carrys out generation system power supply, supplies the working power of all circuits in brak control unit 50, brak control unit
50 control system by detecting the busbar voltage size in frequency converter 80, and by detecting the resistance size of external thermistor
Whether dynamic circuit is opened, and whether intelligent fan needs to rotate.When detect meet braking condition when, brake driver element 60
In lower bridge arm may turn on, stalling current will be flow to from the DC+ ends of braking resistor 70 braking driver element 60 lower bridge arm
DC- ends, braking resistor 70 discharge heat, absorption and regeneration energy, and motor speed declines, and the DC bus-bar voltage of frequency converter 80 reduces,
So as to complete the braking maneuver of whole major loop.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (6)
1. the special new braking device of a kind of machine of kowtowing, it is characterised in that by switch power module and brake module connection group
Into；
The switch power module includes：
Rectifier bridge, for single-phase alternating current to be converted to the direct current of pulsation；
Charhing unit, it is connected with the rectifier bridge；
Filter unit, it is connected with the charhing unit；
Switching Power Supply control unit, it is connected with the filter unit, the break-make for controlling switch pipe；
The brake module includes：
Brak control unit, for controlling the unlatching of braking circuit；
Driver element is braked, is connected with the brak control unit, for turning on the electric current of the braking circuit；
Braking resistor, it is connected with the braking driver element.
A kind of 2. special new braking device of machine of kowtowing according to claim 1, it is characterised in that the rectifier bridge by
First commutation diode, the second commutation diode, the 3rd commutation diode, the 4th commutation diode, the 5th commutation diode,
Six commutation diodes, the 7th commutation diode and the 8th commutation diode composition；
The negative pole of first commutation diode is connected with the negative pole of the 8th commutation diode；First commutation diode
Positive pole be connected with the negative pole of second commutation diode；The positive pole of second commutation diode and the 3rd rectification two
The negative pole connection of pole pipe；The positive pole of 3rd commutation diode is connected with the negative pole of the 4th commutation diode；Described
The positive pole of four commutation diodes is connected with the positive pole of the 5th commutation diode；The negative pole of 5th commutation diode and institute
State the positive pole connection of the 6th commutation diode；The negative pole of 6th commutation diode and the positive pole of the 7th commutation diode
Connection；The negative pole of 7th commutation diode is connected with the positive pole of the 8th commutation diode.
A kind of 3. special new braking device of machine of kowtowing according to claim 2, it is characterised in that the charhing unit
It is made up of the first thermistor and the second thermistor；
One end of first thermistor is connected with the negative pole of the 8th commutation diode；First thermistor it is another
One end is connected with one end of second thermistor；The other end of second thermistor is connected with the filter unit.
A kind of 4. special new braking device of machine of kowtowing according to claim 3, it is characterised in that the filter unit
It is made up of the first electrochemical capacitor, the second electrochemical capacitor, first resistor and second resistance；
One end of first electrochemical capacitor simultaneously meets the other end of second thermistor, one end of the first resistor and institute
State Switching Power Supply control unit；One end of second electrochemical capacitor simultaneously connects the other end of first electrochemical capacitor, described
One end of the other end of one resistance and the second resistance；The other end of second electrochemical capacitor simultaneously connects the 5th rectification two
The positive pole of pole pipe, the other end of the second resistance and the Switching Power Supply control unit.
A kind of 5. special new braking device of machine of kowtowing according to claim 1, it is characterised in that the braking driving
Unit is made up of the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first diode and the second diode；
The drain electrode of first metal-oxide-semiconductor simultaneously connects the brak control unit, the negative pole of first diode；First MOS
The source electrode of pipe and the negative pole for connecing the positive pole of first diode, the drain electrode of second metal-oxide-semiconductor and second diode；Institute
State the source electrode of the second metal-oxide-semiconductor and connect the brak control unit, the positive pole and frequency converter of second diode；Described second
The grid of metal-oxide-semiconductor is connected with the brak control unit.
A kind of 6. special new braking device of machine of kowtowing according to claim 5, it is characterised in that the braking resistor
One end and connect the drain electrode of first metal-oxide-semiconductor and the frequency converter；The other end of the braking resistor and first metal-oxide-semiconductor
Grid connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721008531.0U CN207069948U (en) | 2017-08-14 | 2017-08-14 | A kind of special new braking device of machine of kowtowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721008531.0U CN207069948U (en) | 2017-08-14 | 2017-08-14 | A kind of special new braking device of machine of kowtowing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207069948U true CN207069948U (en) | 2018-03-02 |
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ID=61514784
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721008531.0U Active CN207069948U (en) | 2017-08-14 | 2017-08-14 | A kind of special new braking device of machine of kowtowing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207069948U (en) |
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2017
- 2017-08-14 CN CN201721008531.0U patent/CN207069948U/en active Active
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