CN208445505U - Double frequency electrical machinery controller - Google Patents
Double frequency electrical machinery controller Download PDFInfo
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- CN208445505U CN208445505U CN201821064544.4U CN201821064544U CN208445505U CN 208445505 U CN208445505 U CN 208445505U CN 201821064544 U CN201821064544 U CN 201821064544U CN 208445505 U CN208445505 U CN 208445505U
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Abstract
The utility model is suitable for motor control technology field, provides a kind of double frequency electrical machinery controller, connects three phase mains, comprising: three road double-direction control devices are separately connected the different triple line of the three phase mains；Trigger control unit, for controlling the on-off of the double-direction control device according to triggering command；Phase-sequence phase detection unit, for obtaining the phase change information of the three phase mains；Current detecting unit, for detecting the operating current information of motor；Sensor processing unit is transferred to central processing unit for receiving the operating current information of the phase change information and motor, and by these information；Central processing unit, it is connected with low-frequency start unit, power frequency startup unit, instruction input unit, data outputting unit and human and machine interface unit, the central processing unit is used to control the working condition of the double-direction control device according to preset instructions and motor operation information.Whereby, the utility model can efficiently realize the bi-frequency control of motor under the premise of not increasing cost.
Description
Technical field
The utility model relates to motor control technology field more particularly to a kind of double frequency electrical machinery controllers.
Background technique
With the asynchronous machine starter that three-phase controllable silicon pressure regulation current limiting technique principle makes, obtain in many occasions extensively
Application, but this kind of motor starter can only make specified turn under the conditions of power frequency of electric motor operation after boot up is completed
Speed.
Many operating condition production occasions need motor, and there are two types of revolving speeds, to meet working condition requirement, such as fire pump motor
Need in the case where fire condition does not occur throughout the year, regular low speed operation certain time to prevent getting rusty, current technology scheme be in addition to
It installs except power frequency motor starter, also to increase a frequency converter, to realize daily low speed derusting vehicle living.It is certain to need to lubricate
Large-scale compressor need artificial jiggering in operation sequence before normal high-speed cruising, or in addition install micro-machine and change additional
Fast case carries out low speed vehicle living, increases cost or reduces production efficiency.
In summary, the existing technology has inconveniences and defects in actual use, so it is necessary to be improved.
Utility model content
For above-mentioned defect, the purpose of this utility model is to provide a kind of double frequency electrical machinery controllers, can be not
The bi-frequency control of motor is efficiently realized under the premise of increasing cost.
To achieve the goals above, the utility model provides a kind of double frequency electrical machinery controller, connects three phase mains, comprising:
Three road double-direction control devices, are separately connected the different triple line of the three phase mains；
Trigger control unit, for controlling the on-off of the double-direction control device according to triggering command；
Phase-sequence phase detection unit, for obtaining the phase change information of the three phase mains；
Current detecting unit, for detecting the operating current information of motor；
Sensor processing unit, for receiving the operating current information of the phase change information and motor, and by these
Information is transferred to central processing unit；
Central processing unit is connected with low-frequency start unit, power frequency startup unit, instruction input unit, data output list
Member and human and machine interface unit, the central processing unit are used to be controlled described two-way according to preset instructions and motor operation information
The working condition of control device.
Double frequency electrical machinery controller according to the present utility model, the double-direction control device are anti-for bidirectional triode thyristor or by two
One-way SCR composition in parallel.
Double frequency electrical machinery controller according to the present utility model, the central processing unit are further used for controlling three tunnel
The turn-on time of double-direction control device.
Double frequency electrical machinery controller according to the present utility model, the three phase mains correspond to A phase, B phase and C phase, and corresponding
Three road double-direction control devices be respectively Ta, Tb and Tc, when A phase voltage is higher than B phase voltage, control conducting Ta and Tb, and A phase
The voltage alternate with B is when inverting zero passage, Ta and Tb shutdown；
When being connected from Ta and Tb, when phase passes through predetermined angle, Ta and Tc, Tb and Tc, Tb and Ta, Tc are successively controlled
It is connected with Ta, Tc and Tb, six groups of phase combination circulation conductings.
Double frequency electrical machinery controller according to the present utility model, the predetermined angle are 420 degree.
The utility model is separately connected the different triple line of three phase mains by preset three roads double-direction control device.Center
Processing unit detects the related work information of three phase mains and motor by phase-sequence phase detection unit, current detecting unit, and
The on-off of each double-direction control device is controlled with this.Whereby, the utility model is in the item for not increasing original motor starter hardware cost
Under part, by increasing a kind of software trigger control method of AC/AC (alternating current) variable-frequency, and starting current and running current is combined to distinguish current limliting
Control allows motor in rated current hereinafter, with low frequency slow-speed of revolution longtime running, while retaining electric machine controller routine work
Frequency starting operation characteristic, solves the requirement that certain workplaces need two kinds of revolving speeds of motor.
Detailed description of the invention
Fig. 1 is the double frequency electrical machinery controller architecture schematic diagram of the utility model；
Fig. 2 is the control machines phase-sequence phase schematic diagram of an embodiment of the present invention；
Fig. 3 A is the winding connection figure of an embodiment of the present invention；
Fig. 3 B is the synthesis rotating magnetic potential schematic diagram of an embodiment of the present invention；
Fig. 4 is the winding conducting and composite magnetic power schematic diagram of an embodiment of the present invention；
Fig. 5 is the loop control schematic diagram of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Referring to Fig. 1, the utility model provides a kind of double frequency electrical machinery controller, connects three phase mains.The double frequency electrical machinery
Controller includes:
Three road double-direction control devices 10, are separately connected the different triple line of the three phase mains.Specifically, the three-phase electricity
Source corresponds to A phase, B phase and C phase, and corresponding three roads double-direction control device is respectively Ta, Tb and Tc.
Trigger control unit 20, for controlling the on-off of the double-direction control device according to triggering command.Triggering control is single
Member 20 can use existing control circuit, the instruction that central processing unit 60 is sent be received, to each double-direction control device
Turn-on time and duration can be controlled.
Phase-sequence phase detection unit 30, for obtaining the phase and phase sequence change information of the three phase mains.
Current detecting unit 40 is handled for detecting the operating current information of motor, and by these information by sensor
The feedback of unit 50 is controlled to central processing unit 60.
Sensor processing unit 50, for receiving the operating current information of the phase change information and motor, and by this
A little information are transferred to central processing unit 60.
Central processing unit 60 is connected with low-frequency start unit 61, power frequency startup unit 62, instruction input unit 63, number
According to output unit 64 and human and machine interface unit 65.The central processing unit 60 is used for according to preset instructions and motor operation information,
Control the working condition of the double-direction control device 10.
The utility model can form control pulse, when passing through conducting based on the working condition to double-direction control device 10
Between control form different size of control electric current and voltage, so that motor is worked in different conditions.
Specifically, the power frequency startup operation control of the double frequency electrical machinery controller of the utility model is using conventional constant current starting
Mode, low rate start and progress control method are what's new, in conjunction with Fig. 2, trigger Ta and Tb simultaneously at the t1 moment, at this time A phase
Voltage is higher than B phase voltage, and in conjunction with Fig. 3 A and Fig. 3 B and Fig. 4, electric current is flowed by a phase winding to flow out through B phase winding, A phase magnetic potential
The Fa B phase magnetic potential Fb that is positive is negative, composite magnetic power Z1, when AB phase voltage passes through t1`, voltage reversal, and silicon-controlled Ta, Tb zero passage
Shutdown.After 420 °, in t2 time trigger Ta, Tc, since C phase voltage is lower than A phase voltage, electric current is flowed by A phase to flow through C phase
Out, the magnetic potential Fa Fc that is positive is negative, composite magnetic power Z2.Similarly: T3 time trigger Tb, Tc obtains composite magnetic power Z3, T4 moment
Triggering Tb, Ta obtain composite magnetic power Z4, and T5 time trigger Tc, Ta obtains composite magnetic power Z5, and T6 time trigger Tc, Tb is closed
At magnetic potential Z6, a cycle circulation is so far completed, using 420 ° of above-mentioned controls of repetition.By magnetic potential Z1 to Z6 temporally rotation angle
Degree obtains equal time interval, 6 pulses, right handed magnetic field, according to the operation logic of asynchronous motor, electricity
Motivation can be with stable operation.
6 pulse voltages are up to 380V as seen from Figure 2, and phase modulation angular range is 0-180 °, therefore can pass through unification
It adjusts 6 angles of flow and obtains the pulse voltage of 0-380V, so as to adjust the three-phase current of motor.
The double frequency electrical machinery controller of the utility model uses to make electrical motors to operation steady in a long-term at low frequency
Scheme control as follows: in low-frequency operation, using two-stage current constant control, set on startup it is one biggish to constant current,
By adjusting the angle of flow, biggish pulse voltage is obtained, forms biggish 6 pulse starting current, to increase detent torque, is passed through
A period of time motor start-up terminates after entering stable low-frequency operation, in order to guarantee that motor will not be overheated in longtime running,
The angle of flow for adjusting 6 pulses, by Current Feedback Control, make current of electric in rated current hereinafter, the fever of machine winding also
At the allowed temperature, longtime running.As shown in Figure 2,6 pulses rotation magnetic field rotating one week is 420 ° * 6=2520 °, power frequency magnetic field
Rotation 1 week is 360 °, by 2520/360=7, so this double frequency electrical machinery controller low frequency output frequency is 7 frequency dividings of power frequency, works as work
7.14Hz is exported when frequency 50Hz；When power frequency is 60Hz, output frequency 8.57Hz.
The utility model triggers Ta, Tb silicon controlled module when A phase voltage is higher than B phase voltage, in motor A phase B phase
Highest 380V pulse voltage is obtained on winding, and when voltage Uab between A phase and B phase winding inverts zero passage turns off naturally, passes through
420 ° of electrical angles trigger Ta, Tc simultaneously again, i.e., successively (double by Fig. 5 sequence trigger switch silicon controlled module when A phase voltage is higher than B phase
To control device).
It should be noted that it is only an example that the angle of flow, which is 420 °, those skilled in the art can be according to the operation of motor
Parameter and the demand of work make the adjustment of adaptability.The starting current in short-term that output is higher than Rated motor starts motor, works as motor
When stable operation, while 6 pulse voltages are reduced, by closed-loop current control, makes current of electric lower than rated current, and meet electricity
The temperature rise that motivation winding allows in longtime running reaches long-term running purpose.
It is run when the utility model power frequency operation using the pressure regulation constant current start-up technique of existing maturation, power frequency operation and low speed
A set of driving triggering and power bi-directional control module are shared, is only increased in the controls when low speed is run described above low
The control program of frequency control program, to realize in the case where not increasing cost, realizing control motor can turn at 2 kinds
Longtime running under speed.
In conclusion the utility model by preset three roads double-direction control device, is separately connected different three of three phase mains
Phase line.Central processing unit detects the related work of three phase mains and motor by phase-sequence phase detection unit, current detecting unit
Make information, and controls the on-off of each double-direction control device with this.Whereby, the utility model is not increasing original motor starter hardware
Under conditions of cost, by increasing a kind of software trigger control method of AC/AC (alternating current) variable-frequency, and starting current and running current are combined
Current limited Control allows motor in rated current hereinafter, with low frequency slow-speed of revolution longtime running respectively, while retaining motor control
Device routine power frequency startup operation characteristic, solves the requirement that certain workplaces need two kinds of revolving speeds of motor.
Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence
In the case of, those skilled in the art work as can make various corresponding changes and modifications, but these according to the utility model
Corresponding changes and modifications all should belong to the protection scope of the utility model the attached claims.
Claims (5)
1. a kind of double frequency electrical machinery controller connects three phase mains characterized by comprising
Three road double-direction control devices, are separately connected the different triple line of the three phase mains；
Trigger control unit, for controlling the on-off of the double-direction control device according to triggering command；
Phase-sequence phase detection unit, for obtaining the phase change information of the three phase mains；
Current detecting unit, for detecting the operating current information of motor；
Sensor processing unit, for receiving the operating current information of the phase change information and motor, and by these information
It is transferred to central processing unit；
Central processing unit, be connected with low-frequency start unit, power frequency startup unit, instruction input unit, data outputting unit and
Human and machine interface unit, the central processing unit are used to control the double-direction control according to preset instructions and motor operation information
The working condition of device.
2. double frequency electrical machinery controller according to claim 1, which is characterized in that the double-direction control device is two-way controllable
Silicon is made of two inverse parallel one-way SCRs.
3. double frequency electrical machinery controller according to claim 1, which is characterized in that the central processing unit is further used for
Control the turn-on time of the three roads double-direction control device.
4. double frequency electrical machinery controller according to claim 3, which is characterized in that the three phase mains corresponds to A phase, B phase
With C phase, and corresponding three roads double-direction control device is respectively Ta, Tb and Tc, when A phase voltage is higher than B phase voltage, control conducting
Ta and Tb, and A phase and the alternate voltage of B is when inverting zero passage, Ta and Tb shutdown；
When being connected from Ta and Tb, when phase passes through predetermined angle, successively control Ta and Tc, Tb and Tc, Tb and Ta, Tc and
Ta, Tc and Tb conducting, six groups of phase combination circulation conductings.
5. double frequency electrical machinery controller according to claim 4, which is characterized in that the predetermined angle is 420 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064544.4U CN208445505U (en) | 2018-07-06 | 2018-07-06 | Double frequency electrical machinery controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064544.4U CN208445505U (en) | 2018-07-06 | 2018-07-06 | Double frequency electrical machinery controller |
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| CN208445505U true CN208445505U (en) | 2019-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923719A (en) * | 2018-07-06 | 2018-11-30 | 大连科工电子设备有限公司 | Double frequency electrical machinery controller |
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2018
- 2018-07-06 CN CN201821064544.4U patent/CN208445505U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923719A (en) * | 2018-07-06 | 2018-11-30 | 大连科工电子设备有限公司 | Double frequency electrical machinery controller |
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Effective date of registration: 20210122 Address after: 116000 no.91-1, Xinping street, Ganjingzi District, Dalian City, Liaoning Province Patentee after: Hailexi Electric Co.,Ltd. Address before: 116000 jinpao Road, Ganjingzi District, Dalian City, Liaoning Province Patentee before: DALIAN KEGONG ELECTRONIC EQUIPMENT Co.,Ltd. |