CN104467296A - Integrated variable frequency motor - Google Patents
Integrated variable frequency motor Download PDFInfo
- Publication number
- CN104467296A CN104467296A CN201410698379.8A CN201410698379A CN104467296A CN 104467296 A CN104467296 A CN 104467296A CN 201410698379 A CN201410698379 A CN 201410698379A CN 104467296 A CN104467296 A CN 104467296A
- Authority
- CN
- China
- Prior art keywords
- motor
- frequency converter
- module
- frequency
- current
- 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.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses an integrated variable frequency motor and relates to a variable frequency motor. In a current traditional variable frequency motor and variable frequency driver separated system, as a combined object of a motor and a driver is uncertain, more user parameter settings are considered usually on the design of the driver, settings are complex, the cooling area of a frequency converter is limited, and cooling is poor. The integrated variable frequency motor comprises a motor and a frequency converter, and is characterized in that the frequency converter is arranged at the rear end of the motor; the frequency converter and the motor are of an integrated structure without cable connection; the frequency converter is fastened on a rear end cover of the motor; three-phase alternating current is connected with the frequency converter through a power connection wire; an upper computer is connected with the frequency converter through an upper computer connection wire and provides upper computer instructions for the frequency converter. According to the technical scheme, control integration of the motor and the frequency converter completely solves the problem that the motor and the frequency converter waste products, the system reliability is high, the system is small in overall size, and certain convenience is brought to maintenance and installation.
Description
Technical field
The present invention relates to a kind of variable-frequency motor, is especially integral type variable-frequency motor.
Background technology
Motor for blower fan water pump generally adopts general-purpose machine technical scheme, operational efficiency is lower, adopts universal high efficiency electric to carry out replacement coupling and uses, both cannot give play to motor high-efficiency operation characteristic, the high efficiency of system cloud gray model can not be improved, system condition bad adaptability, as traditional variable-frequency motor and variable frequency drives separate type system, due to the uncertainty of motor and drive combination object, therefore in driver design, the more customer parameter of general consideration is arranged, such as the parameter of electric machine is arranged, low-speed voltage lifting etc., for user, make to make good use of frequency conversion system, the runnability of frequency conversion system the best of bringing into play, carry out so specialty but requisite parameter setting work is obviously difficult, due to the high frequency pulse power supply that variable frequency drives exports, it is nonideal sine-wave power, the voltage reflection synergistic effect of the pulse power in cable transmission, motor is made very easily to bear the terminal voltage of 2 times even higher, electrical machine insulation is easily caused to lose efficacy, because motor and variable frequency drives are power-type device, the loss heating of himself, the larger problem such as structural volume, cooling heat dissipation are the technological difficulties becoming motor and variable frequency drives integrated design.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition carries out improving to prior art and improves, and provides integral type variable-frequency motor, to reach object that is stable, convenient for installation and maintenance, that reduce costs.For this reason, the present invention takes following technical scheme.
Integral type variable-frequency motor, comprise motor, frequency converter, it is characterized in that: described frequency converter is placed in motor rear end, integral structure for being connected without cable between frequency converter with motor, described frequency converter is fastened on back end cover for motor, three-phase alternating current is connected with frequency converter by electric power connection line, and host computer is connected with frequency converter, for frequency converter provides host computer instruction by host computer connecting line.Motor is integrated with variable frequency control, the loss product problem of complete solution motor and frequency converter, and system reliability is high, and it is less that system also has overall volume, both provides certain facility for maintenance and installation.
As improving further and supplementing technique scheme, the present invention also comprises following additional technical feature.
Frequency converter comprises frequency converter housing, the main control module be located in frequency converter housing, host computer speed command module, power supply indicator, malfunction indicator lamp, power module, inverter module and current sample module, described frequency converter housing is fixed on the afterbody end cap of motor by nut, the inverter module of frequency converter, by the rear end cap of screw fastening at motor, stretches in the front end of motor outside motor output shaft.Inverter module is close to the rear end cap of motor by securing member, and the heat of inverter is directly conducted by rear end cap, improves the job stability of frequency converter.
Described motor is permagnetic synchronous motor, and described rotor adopts rare earth permanent-magnetic material, and the stator of described motor adopts skewed stator slot structure.Improve electric efficiency, effectively reduce cogging torque.
Described main control module adopts DSP or MCU.
Described current sample module adopts difference sample circuit, and described difference sample circuit comprises sampling resistor.Alternative sensor, reduces cost, and can ensure the fluctuation ratio of lower motor output torque, improves motor traveling comfort.
Described malfunction indicator lamp is LED.LED reliable operation, and display is obviously, user is easy to the change finding malfunction indicator lamp.
The rear end cap material of described motor is cast aluminium.Cast aluminium rear end cap accelerates radiating efficiency.
Described malfunction indicator lamp comprises alarm for high voltage lamp, undervoltage warning lamp, overcurrent alarm lamp, starts failed lamp, input phase failure alarm lamp.
Described frequency converter adopts D shaft current to be the control mode of 0, the method of Q shaft current tracing preset torque carries out vector control, the control to motor speed is reached by the size controlling given Q shaft current, current sample module is by the electric current that samples and information of voltage, deliver to main control module, main control module, according to the method for model reference adaptive, estimates the motor speed of current state; When position estimation, adopt sliding formwork control mode, try to achieve rotor-position by estimation back-emf, according to the rotor-position estimated, sample rate current is converted through clark conversion and park, and given reference value combines, regulated by PI and produce D shaft voltage and Q shaft voltage respectively, and then by park inverse transformation and clark inverse transformation, convert voltage signal to three-phase voltage signal, to output to the three phase inverter bridge of inverter module, supply motor, makes machine operation.
Main control module is connected by optical coupling isolator with inverter module, main control module is connected by difference sample circuit with current sample module, the current signal that main control module provides according to current sample module carries out electric current loop closed-loop control, and the SVPWM signal that main control module sends is connected with inverter module by optical coupling isolator.
Beneficial effect: the integrated design of motor and frequency converter, decreases cable and connects, and improve insulation impact, frequency converter can dispel the heat by motor rear end cover, and machine system volume is minimum, is convenient to installation and maintenance, improves the stability that motor runs, reduces costs.
Accompanying drawing explanation
Fig. 1 is present system structure chart.
Fig. 2 is annexation of the present invention and indicator diagram.
Fig. 3 is present system control block diagram.
In figure: 1-frequency converter; 2-motor; 3-motor shaft; 4-frequency converter housing; 5-host computer connecting line; 6-electric power connection line; 7-system power supply indicator light; 8-system failure indicator light; 9-power module; 10-host computer speed command module; 11-main control module; 12-inverter module; 13-current sample module; 14-load.
Embodiment
Below in conjunction with Figure of description, technical scheme of the present invention is described in further detail.
As shown in Figure 1, the present invention comprises frequency converter 1 and motor 2, and frequency converter 1 is fixed on the afterbody end cap of motor 2 by nut.Wherein, the inverter module 12 of frequency converter 2 at motor 2 rear end cap, utilizes motor 2 rear end cap part to dispel the heat by screw fastening.The front end of motor is stretched in, for connecting 15 loads outside motor output shaft 3.
As shown in Figure 1, 2, 3, system input adopts connection electric power connection line 6 three-phase alternating-current supply to be input to frequency converter 1 inside.Then by the power module 9 of frequency converter 1, the three-phase alternating current inputted by electric power connection line 6 is converted to various direct voltage, normally runs for frequency converter 1.
As shown in Figure 2,3, host computer connecting line 5 is connected internally to main system control module 11 by frequency converter 1, host computer speed command module 10 adopts analog voltage signal, is connected to the analog port of main control module 11, after digital-to-analogue conversion, carry out velocity close-loop control as internal speed instruction.Main control module 11 has power module 9 to carry out power voltage supply.Power on normally, power supply indicator 7 is lighted, indication mechanism voltage normal power supply.Be connected to the malfunction indicator lamp 8 of main control module 11 after systems axiol-ogy to fault-signal, main control module 11 sends faulty indication instruction, and malfunction indicator lamp 8 is glimmered.Main control module 11 is connected by optical coupling isolator with inverter module 12, main control module 11 is connected by difference sample circuit with current sample module 14, the current signal that main control module 11 provides according to current sample module 14 carries out electric current loop closed-loop control, and the SVPWM signal that main control module 11 sends is connected with inverter module 12 by optical coupling isolator.Inverter module 12 is connected with motor 13, and the speed that the SVPWM signal that main control module 11 exports controls motor 13 by inverter 12 regulates.Motor 13 is connected with load 15 by motor shaft 3, and band dynamic load 15 operates.
For improving the efficiency of motor part and effectively reducing cogging torque, motor 2 is permagnetic synchronous motors, and motor 2 rotor adopts rare earth permanent-magnetic material, and the stator of motor 2 adopts stator to tilt the structure of half teeth groove.
Under the prerequisite ensureing sampling precision, in order to reduce costs further.Current sample module 13 adopts sampling with high precision resistance, and the method taking difference to sample is to the current sensor replacing price more expensive.Corresponding frequency converter 1 adopts ensorless control algorithm, adopt in this example sliding mode observer technology without sensing vector control FOC, adopt the control strategy of Id=0, the method of Iq tracing preset torque designs vector control system, reaches the control to motor speed by the size controlling given Iq.By the electric current that samples and information of voltage, deliver to speed and position estimation.Use current model and the voltage model of motor equation, adopt the method for model reference adaptive, estimate the motor speed of current state.In position estimation, adopt sliding formwork control mode, try to achieve rotor-position by estimation back-emf.Use the angle rotor position estimated to be converted through clark conversion and park by sample rate current, and given reference value combine, and is regulated produce D shaft voltage Vd and Q shaft voltage Vq respectively by PI.And then the angle and clark inverse transformation and SVPWM technology that estimate is used equally by park inverse transformation, convert voltage signal to three-phase voltage signal, to output to three phase inverter bridge, supply motor, makes machine operation.Wherein main control module 11 adopts DSP or MCU.
In order to improve the reliability of work, and the exception of user's energy Timeliness coverage indicator light, malfunction indicator lamp 8 adopts LED, frequency converter when occur high pressure, under-voltage, overcurrent, startup failure or input phase failure time, frequency converter blocks system and exports, and custom system exists fault to adopt corresponding LED flashing mode to notify.
Integral type variable-frequency motor shown in above Fig. 1-3 is specific embodiments of the invention; substantive distinguishing features of the present invention and progress are embodied; can according to the use needs of reality; under enlightenment of the present invention; it is carried out to the equivalent modifications of the aspect such as shape, structure, all at the row of the protection range of this programme.
Claims (10)
1. integral type variable-frequency motor, comprise motor (2), frequency converter (1), it is characterized in that: described frequency converter (1) is placed in motor (2) rear end, integral structure for being connected without cable between frequency converter (1) with motor (2), described frequency converter is fastened on motor (2) rear end cap, three-phase alternating current is connected with frequency converter (1) by electric power connection line (6), and host computer is connected with frequency converter (1), for frequency converter (1) provides host computer instruction by host computer connecting line (5).
2. integral type variable-frequency motor according to claim 1, it is characterized in that: frequency converter (1) comprises frequency converter housing (4), be located at the main control module (11) in frequency converter housing (4), host computer speed command module (10), power supply indicator (7), malfunction indicator lamp (8), power module (9), inverter module (12) and current sample module (13), described frequency converter housing (4) is fixed on by nut on the afterbody end cap of motor (2), the inverter module (12) of frequency converter (2) is by the rear end cap of screw fastening in motor (2), the front end of motor is stretched in outside motor output shaft 3.
3. integral type variable-frequency motor according to claim 1, is characterized in that: described motor (2) is permagnetic synchronous motor, and described motor (2) rotor adopts rare earth permanent-magnetic material, and the stator of described motor (2) adopts skewed stator slot structure.
4. integral type variable-frequency motor according to claim 2, is characterized in that: described main control module (11) adopts DSP or MCU.
5. integral type variable-frequency motor according to claim 2, is characterized in that: described current sample module (13) adopts difference sample circuit, and described difference sample circuit comprises sampling resistor.
6. integral type variable-frequency motor according to claim 2, is characterized in that: described malfunction indicator lamp (8) is LED.
7. integral type variable-frequency motor according to claim 2, is characterized in that: the rear end cap material of described motor (2) is cast aluminium.
8. integral type variable-frequency motor according to claim 6, is characterized in that: described malfunction indicator lamp (8) comprises alarm for high voltage lamp, undervoltage warning lamp, overcurrent alarm lamp, starts failed lamp, input phase failure alarm lamp.
9. integral type variable-frequency motor according to claim 2, it is characterized in that: described frequency converter (1) adopts D shaft current to be the control mode of 0, the method of Q shaft current tracing preset torque carries out vector control, the control to motor speed is reached by the size controlling given Q shaft current, current sample module (13) is by the electric current that samples and information of voltage, deliver to main control module (11), main control module (11), according to the method for model reference adaptive, estimates the motor speed of current state; When position estimation, adopt sliding formwork control mode, try to achieve rotor-position by estimation back-emf, according to the rotor-position estimated, sample rate current is converted through clark conversion and park, and given reference value combines, regulated by PI and produce D shaft voltage and Q shaft voltage respectively, and then by park inverse transformation and clark inverse transformation, convert voltage signal to three-phase voltage signal, to output to the three phase inverter bridge of inverter module (12), supply motor, makes machine operation.
10. integral type variable-frequency motor according to claim 9, it is characterized in that: main control module (11) is connected by optical coupling isolator with inverter module (12), main control module (11) is connected by difference sample circuit with current sample module (14), the current signal that main control module (11) provides according to current sample module (14) carries out electric current loop closed-loop control, the SVPWM signal that main control module (11) sends is connected with inverter module (12) by optical coupling isolator, inverter module (12) is connected with motor (13), the speed that the SVPWM signal that main control module (11) exports controls motor (13) by inverter (12) regulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698379.8A CN104467296A (en) | 2014-11-28 | 2014-11-28 | Integrated variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698379.8A CN104467296A (en) | 2014-11-28 | 2014-11-28 | Integrated variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104467296A true CN104467296A (en) | 2015-03-25 |
Family
ID=52912845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410698379.8A Pending CN104467296A (en) | 2014-11-28 | 2014-11-28 | Integrated variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104467296A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322843A (en) * | 2015-12-08 | 2016-02-10 | 卧龙电气集团股份有限公司 | Start-against-wind system for integrated variable-frequency motor and working method of start-against-wind system |
| CN105404181B (en) * | 2015-10-20 | 2018-07-31 | 卧龙电气集团股份有限公司 | A kind of integral type variable-frequency motor multi-function communication method |
| EP3703249A4 (en) * | 2017-10-24 | 2021-04-28 | Hitachi Industrial Equipment Systems Co., Ltd. | Power conversion device and controlling method therefor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1475539A2 (en) * | 2003-05-08 | 2004-11-10 | Automotive Motion Technology Limited | Pump assembly |
| CN201118417Y (en) * | 2007-07-11 | 2008-09-17 | 宏佳机电有限公司 | Environment-protection energy-saving lanthanon permanent magnetic electromotor |
| CN201478972U (en) * | 2009-04-20 | 2010-05-19 | 深圳市拓邦电子科技股份有限公司 | Motor special for dish washer and water pump assembly using same |
| CN201474993U (en) * | 2009-03-09 | 2010-05-19 | 郑云峰 | Position sensorless vector control rare-earth permanent magnet synchronous motor water pump |
| CN204334231U (en) * | 2014-11-28 | 2015-05-13 | 卧龙电气集团股份有限公司 | Integral type variable-frequency motor |
-
2014
- 2014-11-28 CN CN201410698379.8A patent/CN104467296A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1475539A2 (en) * | 2003-05-08 | 2004-11-10 | Automotive Motion Technology Limited | Pump assembly |
| CN201118417Y (en) * | 2007-07-11 | 2008-09-17 | 宏佳机电有限公司 | Environment-protection energy-saving lanthanon permanent magnetic electromotor |
| CN201474993U (en) * | 2009-03-09 | 2010-05-19 | 郑云峰 | Position sensorless vector control rare-earth permanent magnet synchronous motor water pump |
| CN201478972U (en) * | 2009-04-20 | 2010-05-19 | 深圳市拓邦电子科技股份有限公司 | Motor special for dish washer and water pump assembly using same |
| CN204334231U (en) * | 2014-11-28 | 2015-05-13 | 卧龙电气集团股份有限公司 | Integral type variable-frequency motor |
Non-Patent Citations (1)
| Title |
|---|
| 庞志森等: "《现代综合能源电动船舶的电力推进技术》", 30 November 2013, 中国水利水电出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404181B (en) * | 2015-10-20 | 2018-07-31 | 卧龙电气集团股份有限公司 | A kind of integral type variable-frequency motor multi-function communication method |
| CN105322843A (en) * | 2015-12-08 | 2016-02-10 | 卧龙电气集团股份有限公司 | Start-against-wind system for integrated variable-frequency motor and working method of start-against-wind system |
| EP3703249A4 (en) * | 2017-10-24 | 2021-04-28 | Hitachi Industrial Equipment Systems Co., Ltd. | Power conversion device and controlling method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3034868B1 (en) | Systems and methods for increasing wind turbine power output | |
| CN101807827B (en) | Digital motor | |
| CN103701383A (en) | Method for restraining overvoltage of busbar in vector control system | |
| CN103856132A (en) | Control system of alternating current servo permanent magnet synchronous motor | |
| WO2017174957A2 (en) | Method and apparatus for controlling three-phase electric motor | |
| CN203574577U (en) | Brushless direct current motor control system and brushless direct current fan-coil unit | |
| CN105322843A (en) | Start-against-wind system for integrated variable-frequency motor and working method of start-against-wind system | |
| CN104467296A (en) | Integrated variable frequency motor | |
| CN205193510U (en) | Novel aircraft electrical power generating system tests platform device | |
| CN106351533A (en) | Control system of automatic revolving door | |
| CN201022185Y (en) | Electromotor controller | |
| CN102570959A (en) | Control system and control method for low-voltage high-current permanent magnet synchronous motors | |
| CN103066914B (en) | Direct power control system of high power factor induction motor | |
| CN202334259U (en) | Low-voltage frequency converter with heat radiation function | |
| CN104213597A (en) | Alternating-current variable-frequency speed-regulating control system for electro-hydraulic excavator | |
| CN207427014U (en) | A kind of integral control circuit of brshless DC motor | |
| CN211880087U (en) | Locked rotor and open-phase protection permanent magnet synchronous motor | |
| CN204334231U (en) | Integral type variable-frequency motor | |
| CN204794796U (en) | Thermal power unit air cooling island cooling unit's controlling means | |
| CN204696967U (en) | Dual chip brshless DC motor driving control system | |
| CN102355186B (en) | Brake control method for permanent magnet synchronous motor | |
| CN203251263U (en) | Small high speed fan device | |
| CN205123634U (en) | Integral type inverter motor is with contrary wind start -up system | |
| CN201515278U (en) | digital motor | |
| CN204810186U (en) | Sinusoidal wave brushless DC motor driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
|
| RJ01 | Rejection of invention patent application after publication |