CN208955937U - Brushless dual-feed motor four-quadrant frequency variation speed regulating system - Google Patents
Brushless dual-feed motor four-quadrant frequency variation speed regulating system Download PDFInfo
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- CN208955937U CN208955937U CN201820996736.2U CN201820996736U CN208955937U CN 208955937 U CN208955937 U CN 208955937U CN 201820996736 U CN201820996736 U CN 201820996736U CN 208955937 U CN208955937 U CN 208955937U
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- feed motor
- quadrant frequency
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Abstract
The utility model relates to a kind of brushless dual-feed motor four-quadrant frequency variation speed regulating systems, the system high pressure power grid is connect by high voltage connector with brushless dual-feed motor power winding, high-voltage fence is connected to four-quadrant converter plant input breaker by step-down transformer, it is connected to charging resistor and charging contactor using fuse and input reactance device, then accesses four-quadrant frequency converter input terminal；Four-quadrant frequency converter output pass through output reactance device and output contactor, while it is in parallel with soft starting device end of incoming cables after be connected to brushless dual-feed motor control winding.Soft starting device end of incoming cables is shorted by copper bar after starting contactor and short circuit contactor series connection, the common point of starting contactor and short-circuiting contactor is accessed after start-up resistor star-like connection.The system, which is realized, adjusts the speed high-power, high-tension electric motor with low capacity, low-voltage four-quadrant frequency converter, and speed adjustable range is wide, it can be achieved that metasynchronism is to hypersynchronous speed regulation.
Description
Technical field
The utility model relates to four-quadrant frequency variation speed regulating system more particularly to a kind of brushless dual-feed motor four-quadrant frequency conversion tune
Speed system.
Background technique
High-voltage motor is mostly asynchronous machine and synchronous motor at present, is generally adjusted the speed using high-voltage frequency converter.High voltage variable
Frequency device Capacity Selection is generally bigger than Rated motor capacity, and in addition high-voltage frequency converter mostly uses opening up for multiple power cells overlapped in series
Structure is flutterred, control system is complicated, and malfunctioning node is more, and volume is big, and Operation and Maintenance is difficult, at high cost.Brushless dual-feed motor is as one
Kind New-type electric machine, two groups of stator winding with power winding and control winding, power winding are directly connected to high pressure or low tension
Net, control winding are connected low voltage frequency converter, are adjusted the speed to realize using low voltage frequency converter, but use general-purpose diode whole
The frequency converter of stream can only realize hypersynchronous speed regulation.
Utility model content
In view of the above-mentioned problems of the prior art, the utility model provides a kind of brushless dual-feed motor four-quadrant frequency conversion
Speed-regulating system, the system mainly include high-voltage fence, brushless dual-feed motor, measurement of rotating speed encoder and step-down transformer；Also
Input breaker, fuse, input reactance device, charging contactor and charging resistor and four-quadrant frequency converter, output reactance device
With the four-quadrant frequency variation speed regulating device of output contactor composition；There are also short-circuiting contactor, starting contactor, start-up resistor and short circuits
The soft starting device of copper bar composition.High-voltage fence is connect by high voltage connector with brushless dual-feed motor power winding, high-voltage electricity
Net is connected to four-quadrant converter plant input breaker by step-down transformer, is connected to using fuse and input reactance device
Charging resistor and charging contactor, then access four-quadrant frequency converter input, and output reactance device is passed through in four-quadrant frequency converter output
Brushless dual-feed motor control winding is connected to output contactor.Soft starting device start-up resistor star-like connection connects
Tentaculum and the soft common point for opening contactor, after being shorted copper bar by concatenated short-circuiting contactor and starting contactor, with brushless pair
The connection of generating aid control winding；Measurement of rotating speed encoder line is connect with four-quadrant frequency converter master control borad.
Further four-quadrant frequency variation speed regulating system, rectification and inversion power semiconductor device controllable using switch, it is whole
It flows power cell and converter module is independent universal power unit, using DC master row parallel-connection structure, direct current mother can be passed through
Row's extension parallel connection n (n >=1) is convenient for capacity extensions or Redundancy Design to power cell.
Further four-quadrant frequency converter master control borad and power unit control plate are controlled using optical-fibre communications, anti-interference strong.It adopts
With the RS485 connection of touch screen human-computer interaction interface, it is easy to monitor and safeguard.In addition frequency converter input, output voltage and electricity
Stream and power winding voltages, current signal line, DC bus-bar voltage signal wire, contactor control and feedback signal line all with change
The connection of frequency device master control borad.Frequency converter integrated programmable logic control function.Four-quadrant frequency converter master control borad uses dual-CPU architecture,
Control rectification and converter module respectively, control is accurate, fast response time.
Further four-quadrant frequency variation speed regulating system, frequency converter output contactor and starting contactor electrical interlocks.
The utility model four-quadrant frequency variation speed regulating system uses controlled rectification, has energy feedback function, realizes with low
Press low capacity four-quadrant frequency converter control high-power brushless dual-feed motor from metasynchronism to hypersynchronous full distance speed regulating.
It is described in further detail with reference to the accompanying drawing with the embodiments of the present invention.
Detailed description of the invention
Fig. 1 is a kind of brushless dual-feed motor four-quadrant frequency variation speed regulating main loop schematic diagram；
Fig. 2 is four-quadrant frequency converter circuit diagram shown in Fig. 1.
Specific embodiment
Referring to Fig.1 as it can be seen that input breaker 7 closes a floodgate, right after the system high pressure power grid 1 feeding decompression of step-down transformer 6
Capacitor of frequency converter is pre-charged, and charging contactor 11 closes a floodgate after DC voltage reaches target value, and four-quadrant converter plant powers on
It completes.It powers on rear four-quadrant frequency converter 12 and carries out self-test, 3 voltage of power winding is detected by PT and PID locking phase is carried out to it
Processing issues ready instruction after normal.
Shown in Fig. 2, point touching screen start button, the operation of rectified power unit starting, rectification side is to frequency conversion input terminal electricity
Signal is pressed to carry out locking phase, detection DC bus-bar voltage carries out PID adjusting and is used as outer loop control, and acquisition input current carries out coordinate change
It changes dq component into and carries out PID adjusting as inner loop control, the above PID output valve and locking phase aggregation of data are generated into PWM driving control
DC voltage is finally lifted and stablizes in DC bus-bar voltage setting value by signal processed.When DC bus-bar voltage collection value is less than
When setting value, rectified power unit is in rectification state operation, and power grid energy is transmitted to motor；When DC bus-bar voltage collection value
When being greater than the set value, rectified power unit is in inverter mode operation, and electric power generation energy feedback is to power grid, to realize four-quadrant
Limit operation.
In Fig. 1, Fig. 2, simultaneously, high voltage connector 2 and starting contactor 17 close a floodgate rectified power unit starting, motor
Pass through resistance soft start, 16 time-delay closing of short-circuiting contactor, motor operation to synchronous rotational speed.Four-quadrant frequency-changing control system passes through
After encoder 5 detects that revolving speed reaches synchronous rotational speed, it will become by 16 disjunction of starting contactor 17 and short-circuiting contactor, and immediately
Frequency device output contactor 14 closes a floodgate, the converter module output access starting operation of double feedback electric engine control winding 18.With upper switch
Control is automatically performed by four-quadrant frequency-changing control system.It controls, will encode when converter module is adjusted using double closed-loop PID
The surveyed revolving speed of device 5 carries out PID control as feedback quantity, to given rotating speed, this is revolving speed outer loop control；Frequency converter three-phase is exported
Electric current carries out vector coordinate transform, is converted to exciting current and torque current, carries out PID adjusting, this is current inner loop control, i.e.,
To there is the operation of velocity sensor vector control mode.
By touch screen setting speed, motor speed can be made to operate in supersynchronous revolving speed operation, at this time revolving speed n=60*
(f1+f2)/p, wherein P is number of pole-pairs, and f1 is power winding current frequency, and f2 is the electric power frequency of frequency conversion output, or lower than same
Revolving speed operation is walked, at this time revolving speed n=60* (f1-f2)/p.After touch screen clicks stop botton, four-quadrant frequency conversion system adjusts the speed automatically
To after synchronous rotational speed, by 2 disjunction of frequency conversion output contactor 14 and high voltage connector, orderly closedown.
In the process of running, four-quadrant frequency-changing control system carries out real-time monitoring, frequency converter input, output to whole system
Voltage and current, 3 input voltage of power winding and electric current, DC bus-bar voltage, power cell, the status datas such as contactor are real-time
Display on the touchscreen, is shut down, and corresponding failure is recorded and is shown on the touchscreen if any abnormal protection immediately.
Claims (4)
1. a kind of brushless dual-feed motor four-quadrant frequency variation speed regulating system, which mainly includes high-voltage fence (1), brushless double-fed
Machine (4), measurement of rotating speed encoder (5), step-down transformer (6) and four-quadrant converter plant and soft starting device；Its feature exists
In: the high-voltage fence (1) is connect by high voltage connector (2) with brushless dual-feed motor power winding (3)；The high-voltage fence
(1) be also connected in the four-quadrant converter plant input breaker (7) through step-down transformer (6), using fuse (8) and
Input reactance device (9) is connected to charging resistor (10) and charging contactor (11), then accesses four-quadrant frequency converter (12) input
End, four-quadrant frequency converter (12) output are connected to brushless dual-feed motor through output reactance device (13) and output contactor (14)
Control winding (18)；It is short by copper bar after the soft starting device is by starting contactor (17) and short-circuiting contactor (16) series connection
It connects, the common point of starting contactor and short-circuiting contactor (16), starting contactor is accessed after start-up resistor (15) star-like connection
(17) end of incoming cables is connect with brushless dual-feed motor control winding (18)；The measurement of rotating speed encoder (5) connects four-quadrant frequency conversion
Device master control borad.
2. brushless dual-feed motor four-quadrant frequency variation speed regulating system according to claim 1, it is characterised in that: the four-quadrant
Using controllable power semiconductor device is switched, rectified power unit and converter module are for frequency converter (12) rectification and inversion
Independent universal power unit can extend parallel connection n to power cell using DC master row parallel-connection structure by DC master row.
3. brushless dual-feed motor four-quadrant frequency variation speed regulating system according to claim 1, it is characterised in that: the four-quadrant
Frequency converter master control borad uses dual-CPU architecture, and master control borad is connect with power cell drive control plate using communication optical fiber, operation interface
Touch screen is connect with four-quadrant frequency converter master control borad using RS485 connection.
4. brushless dual-feed motor four-quadrant frequency variation speed regulating system according to claim 1, it is characterised in that: the output connects
Tentaculum (14) and starting contactor (17) electrical interlocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820996736.2U CN208955937U (en) | 2018-06-27 | 2018-06-27 | Brushless dual-feed motor four-quadrant frequency variation speed regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820996736.2U CN208955937U (en) | 2018-06-27 | 2018-06-27 | Brushless dual-feed motor four-quadrant frequency variation speed regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208955937U true CN208955937U (en) | 2019-06-07 |
Family
ID=66731446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820996736.2U Active CN208955937U (en) | 2018-06-27 | 2018-06-27 | Brushless dual-feed motor four-quadrant frequency variation speed regulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208955937U (en) |
-
2018
- 2018-06-27 CN CN201820996736.2U patent/CN208955937U/en active Active
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