CN112398412B - Multiphase motor driving system - Google Patents
Multiphase motor driving system Download PDFInfo
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- CN112398412B CN112398412B CN202011379325.7A CN202011379325A CN112398412B CN 112398412 B CN112398412 B CN 112398412B CN 202011379325 A CN202011379325 A CN 202011379325A CN 112398412 B CN112398412 B CN 112398412B
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- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention belongs to the technical field of motor drive, and particularly relates to a multiphase motor drive system which comprises a power connection unit, a power supply unit and a control unit, wherein the power connection unit is used for connecting a power supply; the processing unit is used for processing the accessed power supply, and comprises voltage transformation, phase transformation and frequency conversion; the output unit is used for connecting the power supply obtained after the processing unit processes the power supply into the multi-phase motor; the auxiliary unit is used for matching specific wiring interfaces of the input interface and the output interface according to the input processing information and displaying the specific wiring interfaces. This application handles the back with power supply and directly is used for driving motor, has left out subsequent integration step, through such mode, can save the relevant device of integration back power to can practice thrift the space, reduce the cost, reduce the whole volume of system simultaneously.
Description
Technical Field
The invention belongs to the technical field of motor driving, and particularly relates to a multi-phase motor driving system.
Background
A multi-phase motor generally refers to any machine that converts mechanical energy into electrical energy and electrical energy into mechanical energy.
When the multi-phase motor is electrified with high-frequency direct current with the same voltage level, the motor rotates according to the electrified frequency, namely, the rotating speed of the multi-phase motor can be adjusted through the frequency, and further the multi-phase motor can be used for precise control. Meanwhile, compared with the common motor, the multi-phase motor can effectively improve the overall power because each input phase can reach the maximum current of the common motor.
However, the multi-phase motor has a complicated driving system due to its multiple input phases, as compared with a general motor. Taking a six-phase motor as an example, suppose that a1, B1, and C1 of a certain six-phase motor form three phases, and a2, B2, and C2 form three phases, in the prior art, two three phases need two different transformers to supply power, in other words, the six-phase motor needs two driving systems to supply power to the six-phase motor.
Thus, a special space is required for installing the plurality of driving systems, which not only occupies a large space and is high in cost, but also makes installation of the driving systems troublesome.
Therefore, there is a need for a multiphase motor driving system that can stably drive a multiphase motor while reducing the overall size of the system, facilitating installation, and saving cost.
Disclosure of Invention
The invention aims to provide a multi-phase motor driving system which can stably drive a multi-phase motor, reduce the whole volume of the system, facilitate installation and save cost.
The basic scheme provided by the invention is as follows:
a multi-phase motor drive system comprising:
the power connection unit is used for connecting a power supply;
the processing unit is used for processing the accessed power supply, and comprises voltage transformation, phase transformation and frequency conversion;
and the output unit is used for connecting the power supply obtained after the processing unit processes the power supply into the multi-phase motor.
Basic scheme theory of operation and beneficial effect:
when the system is used, after the power connection unit is connected with the power supply, the processing unit processes the connected power supply, for example, when the connected power supply is a high-voltage power supply, the processing unit reduces the voltage and converts the frequency of the power supply, and when the connected power supply is a low-voltage power supply, the processing unit converts the frequency of the power supply, and the like. The transformation, frequency conversion and phase conversion all belong to common technologies in the field, and the specific contents of the technologies are not described herein. After the power supply is processed, the output unit connects the processed power supply to the multi-phase motor to drive the multi-phase motor.
Compared with the conventional driving system, the system can directly perform targeted processing on the power supply according to the specific power supply requirement of the multi-phase motor, so that the system meets the specific requirement of the multi-phase motor. This application is handled power supply and is directly used for driving motor after, has left out subsequent integration step, and through such mode, this application can save the relevant device of integrated processing back power. Therefore, the space can be saved, the cost can be reduced, and the whole volume of the system can be reduced.
Further, the processing of the processing unit also includes inversion.
The system has stronger applicability, and a direct current power supply can also be used.
Further, the frequency converter in the processing unit adopts a common direct current bus.
By the arrangement, redundant modules can be selected and matched, so that real module online hot standby is realized, and the reliability of the system is greatly improved.
Further, the power switching element of the frequency converter in the processing unit is an IGBT.
By using the IGBT power switch, the wider low-doped drift region can bear high voltage, and high withstand voltage is further realized.
The auxiliary unit is used for inputting processing information, the processing information comprises power supply information and phase change motor information, and the auxiliary unit is used for matching specific wiring interfaces of the input interface and the output interface according to the input processing information and displaying the specific wiring interfaces.
With the aid of the auxiliary unit, even a person who has little knowledge of the motor drive can perform correct wiring operations correctly and proficiently.
Furthermore, when the auxiliary unit is displayed, the auxiliary unit is displayed in an image display mode.
Through the visual mode of image display, the staff can know the specific wiring mode more intuitively and clearly.
The intelligent power supply system further comprises a prompting unit, wherein the prompting unit comprises lamp beads arranged at each interface of the power connection unit and the output unit, and a microcontroller electrically connected with each lamp bead, and the microcontroller is also electrically connected with the auxiliary unit; after the auxiliary unit matches a specific wiring interface, a corresponding electric signal is sent to the prompting unit, and the microcontroller of the prompting unit controls the lamp beads at the corresponding positions to be lightened.
Such an arrangement may help the worker to quickly lock the correct interface.
Further, the lamp beads are LED lamp beads.
Easy to obtain and low in cost.
Further, LED lamp pearl colour difference that connects electric unit and output unit kneck.
The staff can distinguish the interface of the power connection unit and the output unit conveniently.
Furthermore, the lamp beads at the interface of the power connection unit are red, and the lamp beads at the position of the output unit are blue.
Drawings
FIG. 1 is a logic block diagram of a processing unit according to an embodiment of the present invention;
FIG. 2 is a logic diagram related to an auxiliary unit according to an embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
example one
As shown in fig. 1 and 2, a multiphase motor driving system includes a power connection unit, a processing unit, an output unit, an auxiliary unit, and a prompt unit.
The power connection unit is used for connecting a power supply.
The processing unit is used for processing the accessed power supply, and comprises voltage transformation, phase transformation, frequency conversion and inversion;
the output unit is used for connecting the power supply obtained after the processing unit processes to the multi-phase motor.
The frequency converter in the processing unit adopts a common direct current bus, and besides, a power switching element of the frequency converter is an IGBT.
The auxiliary unit is used for matching specific wiring interfaces of the input interface and the output interface according to the input processing information and displaying.
When the auxiliary unit is displayed, the auxiliary unit is displayed in an image display mode. Specifically, the image display of the specific interface position can be performed through the display screen.
The prompting unit comprises lamp beads arranged at each interface of the power connection unit and the output unit, and a microcontroller electrically connected with each lamp bead, and the microcontroller is also electrically connected with the auxiliary unit; after the auxiliary unit matches a specific wiring interface, a corresponding electric signal is sent to the prompting unit, and the microcontroller of the prompting unit controls the lamp beads at the corresponding positions to be lightened.
Wherein, the lamp pearl is the lamp pearl of colour difference, and in this embodiment, the lamp pearl is LED lamp pearl, and connects the LED lamp pearl colour difference of electric unit and output unit kneck, and is specific, connects the lamp pearl of electric unit kneck red, and the lamp pearl of output unit department is blue.
The specific implementation process is as follows:
when the system is used, after the power connection unit is connected with the power supply, the processing unit processes the connected power supply, for example, when the connected power supply is a high-voltage power supply, the processing unit reduces the voltage and converts the frequency of the power supply, and when the connected power supply is a low-voltage power supply, the processing unit converts the frequency of the power supply, and the like. Transformation, frequency conversion and phase transformation are all common technologies in the field, and the specific contents of the technologies are not described herein. In this embodiment, the frequency converter in the processing unit adopts a common dc bus, and in such an arrangement, a redundant module can be selected and configured, so that real module online hot standby is realized, and the reliability of the system is greatly improved. In addition, the power switching elements of the inverter are IGBTs. By using the IGBT power switch, the wider low-doped drift region can bear high voltage, and high withstand voltage is further realized.
After the power supply is processed, the output unit connects the processed power supply to the multi-phase motor to drive the multi-phase motor.
Compared with the conventional driving system, the system can directly perform targeted processing on the power supply according to the specific power supply requirement of the multi-phase motor, so that the system meets the specific requirement of the multi-phase motor. This application is handled power supply and is directly used for driving motor after, has left out subsequent integration step, and through such mode, this application can save the relevant device of integrated processing back power. Therefore, the space can be saved, the cost can be reduced, and the whole volume of the system can be reduced.
Through the assistance of the auxiliary unit, even a person who does not know the motor drive very much can obtain the display information of the specific wiring interface of the input interface and the output interface only by inputting the processing information comprising the power supply information and the phase change motor information through the auxiliary unit, and further carry out correct wiring operation correctly and skillfully. In this embodiment, the auxiliary unit is displayed in an image display manner during displaying. Through the visual mode of image display, the staff can know the specific wiring mode more intuitively and clearly.
After the auxiliary unit matches a specific wiring port, the corresponding electric signal is sent to the prompting unit, and after the microcontroller of the prompting unit receives the electric signal, the LED lamp bead at the position is controlled to be turned on. In this way, the worker is helped to quickly lock the correct interface.
Example two
Different from the first embodiment, in the present embodiment, the output unit includes a plurality of output interfaces, and each output interface has a unique number; each output interface is electrically connected with a plurality of micro fans connected in parallel, and the micro fans are used for radiating heat of the processing unit;
further comprising:
the acquisition unit is used for acquiring the power of each output interface of the acquisition unit;
the analysis unit is electrically connected with each micro fan respectively; the analysis unit is used for analyzing the acquired power of each paired output interface according to the serial number of each output interface; if the analysis result shows that the power of the paired output interfaces is not adaptive, the analysis unit starts the corresponding number of micro fans on the output interfaces with overlarge power according to the analyzed power difference.
The specific implementation process is as follows:
there is the loss of different degree power (for example vary voltage, at the in-process of vary voltage, according to the concrete parameter of vary voltage, can produce different power losses at the in-process of vary voltage to, at this in-process, can produce a large amount of heats), this output that will lead to each output interface is different, and then can lead to the power of each matching phase of input multiphase motor not adaptation, so for a long time, can cause the influence to multiphase motor's life.
By using the system, the acquisition unit acquires the power of each output interface of the unit, and then the analysis unit analyzes the acquired power of each paired output interface according to the serial number of each output interface.
If the analysis result is that the power of the paired output interfaces is not adaptive, the situation that the power loss difference is too large in the processing process is shown. Therefore, the analysis unit starts the micro fans on the output interface with overlarge power, and the number of the started micro fans is determined according to the analyzed power difference value. Like this, can guarantee the power adaptation of each matching phase of motor, and then avoid appearing the heterogeneous motor and not adapt because of the power of each matching phase and lead to life to receive the influence.
In addition, as mentioned above, the processing unit generates a large amount of heat during operation, and the performance of the processing unit is affected by the excessive temperature for a long time. By using the system, the analysis unit can start the micro fans with the corresponding number on the output interface with overlarge power to radiate the processing unit, so that the damage to the processing unit can be reduced, and the maintenance frequency is reduced.
In conclusion, by using the system, the heat of the processing unit can be dissipated while the power supply adaptation of each matching phase of the motor is ensured, and the maintenance frequency of the processing unit is reduced.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
1. A multi-phase motor drive system, comprising:
the power connection unit is used for connecting a power supply;
the processing unit is used for processing the accessed power supply, and comprises voltage transformation, phase transformation and frequency conversion;
the output unit is used for connecting the power supply obtained after the processing unit processes the power supply into the multi-phase motor;
wherein, the processing of the processing unit also comprises inversion; a frequency converter in the processing unit adopts a common direct current bus;
the auxiliary unit is used for inputting processing information, the processing information comprises power supply information and phase change motor information, and the auxiliary unit is used for matching specific wiring interfaces of the input interface and the output interface according to the input processing information and displaying the specific wiring interfaces; when the auxiliary unit is displayed, displaying in an image display mode;
the prompting unit comprises lamp beads arranged at each interface of the power connection unit and the output unit, and a microcontroller electrically connected with each lamp bead, and the microcontroller is also electrically connected with the auxiliary unit; after the auxiliary unit matches a specific wiring interface, a corresponding electric signal is sent to the prompting unit, and the microcontroller of the prompting unit controls the lamp beads at the corresponding positions to be lightened.
2. The multiphase motor drive system of claim 1, wherein: and the power switching element of the frequency converter in the processing unit is an IGBT.
3. The multiphase motor drive system of claim 1, wherein: the lamp beads are LED lamp beads.
4. The multiphase motor drive system of claim 3, wherein: LED lamp beads at the interface of the power connection unit and the output unit are different in color.
5. The multiphase motor drive system of claim 4, wherein: the lamp bead at the interface of the power connection unit is red, and the lamp bead at the position of the output unit is blue.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011379325.7A CN112398412B (en) | 2020-11-30 | 2020-11-30 | Multiphase motor driving system |
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| CN202011379325.7A CN112398412B (en) | 2020-11-30 | 2020-11-30 | Multiphase motor driving system |
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| CN112398412A CN112398412A (en) | 2021-02-23 |
| CN112398412B true CN112398412B (en) | 2022-03-18 |
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| CN109936320A (en) * | 2019-04-26 | 2019-06-25 | 福州大学 | A kind of bi-motor series connection Direct Torque Control based on duty ratio modulation |
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| CN1175163A (en) * | 1996-08-20 | 1998-03-04 | 三星电子株式会社 | Indicator for sound input/output terminal box capable of insert and releasing |
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Denomination of invention: A Multiphase Motor Drive System Effective date of registration: 20230711 Granted publication date: 20220318 Pledgee: Industrial and Commercial Bank of China Limited Chongqing High tech Branch Pledgor: CHONGQING ELECTRIC MACHINE FEDERATION Ltd. Registration number: Y2023980047824 |