CN101521444A - Motor with high starting quality factor and starting method thereof - Google Patents
Motor with high starting quality factor and starting method thereof Download PDFInfo
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- CN101521444A CN101521444A CN200810014323A CN200810014323A CN101521444A CN 101521444 A CN101521444 A CN 101521444A CN 200810014323 A CN200810014323 A CN 200810014323A CN 200810014323 A CN200810014323 A CN 200810014323A CN 101521444 A CN101521444 A CN 101521444A
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Abstract
The invention provides a motor with high starting quality factor. The motor is characterized in that a solid rotor motor and a squirrel-cage rotor motor are coaxially connected with each other by a coupler to assemble the motor; the solid rotor motor adopts a biaxial stretching structure with double-end output shafts, wherein one shaft extension is connected with the output shaft extension of the squirrel-cage motor by the coupler. High starting quality factor, high reliability and excellent running performance are realized by relay starting of dual motors or simultaneous starting of dual motors and running of single-motor. The invention smartly combines the solid rotor motor with the squirrel-cage rotor motor, wherein the solid rotor motor and the squirrel-cage rotor motor have different starting and running characteristics, respective advantages of the starting and running of the solid rotor motor and the squirrel-cage rotor motor are applied and defects thereof are abandoned; no sliding ring brushes are provided and the rotor has no windings, thus facilitating maintenance and running reliably; the motor and the method really solves the difficult problem of incompatible starting, running and reliability, which perplexes the motor industry for a long time, have simple execution mode, are easy to be popularized and completely meet various working conditions of starting with loads.
Description
Technical field
The invention belongs to the motor technology class, be specifically related to a kind of novel high starting quality factor motor and starting method thereof.
Background technology
Weigh motor serviceability quality three big indexs are arranged.Be respectively: high starting quality factor, high operational reliability and being convenient to safeguard, good running performance index.
Modal cage rotor asynchronous machine has good running performance index, high operational reliability and low cost of manufacture, has obtained using widely.But its starting performance is poor especially, and starting quality factor is very low, can not satisfy the operating mode than hard-starting load.
In order to satisfy requirement, select wound rotor asynchronous machine usually than the hard-starting load operating mode.Wound rotor asynchronous machine has higher starting quality factor and good running performance index, but because the existence of slip-ring brush and rotor winding makes the operational reliability relatively poor failure rate height that becomes, maintenance workload is big.
The solid rotor asynchronous motor has very high starting quality factor and high reliability, but runnabilities such as its efficient, power factor are bad especially, only for being used in some special operation condition.
In sum, any motor of described three kinds of motors commonly used all can not satisfy above-mentioned three big indexs simultaneously, is merely able to satisfy wherein two at most.
Summary of the invention
Technical problem to be solved by this invention provides a kind of high starting quality factor motor product and starting operation method thereof with high starting quality factor, high reliability, good runnability.
The high starting quality factor motor of the present invention, it is characterized in that being formed by connecting by the shaft coupling coaxial line by solid rotor electric machine and cage rotor motor, solid rotor electric machine adopts the twin shaft of both-end shaft to stretch structure, and one of them shaft extension is stretched with the cage rotor motor output shaft by shaft coupling and is connected.
Described cage rotor motor is in series with reactor (or other step-down equipment), to satisfy the reduced voltage starting mode.Be connected the starting operation control circuit on solid rotor electric machine and the cage rotor motor, a kind of simple mode is: be in series with A.C. contactor KM2 on the three-phase ac power cord of solid rotor electric machine M2, be in series with reactor XL and A.C. contactor KM1 on the three-phase power line of cage rotor motor M 1, KM1 and XL series connection back are in parallel with KM2 through fuse FU outside electric power network, are parallel with A.C. contactor KM3 on the reactor XL.
The present invention is made up of solid rotor electric machine and cage rotor motor, adopts the method for the starting of bi-motor relay starting or bi-motor, the operation of single motor to realize high starting quality factor, high reliability and good runnability.
Starting operation method of the present invention can be by two kinds of forms:
The one,, bi-motor relay starting, the operation of single motor: at first the solid rotor electric machine unit is completely pressed startup, after the solid rotor electric machine stable operation, the cage rotor motor begins reduced voltage starting and the cage rotor motor is accelerated to rated speed, starting process finishes, and excises the step-down equipment on the cage rotor motor and the running of solid rotor electric machine then successively and makes the independent run with load of cage rotor motor full voltage.
The 2nd,, bi-motor starts simultaneously, the operation of single motor: the full voltage starting simultaneously of cage rotor motor and solid rotor electric machine two-shipper, and motor accelerates to the rated speed operation, and starting process finishes, then solid rotor electric machine is excised from electrical network, switch to the operation of cage rotor motor list motor.This mode relatively is fit to the heavy equipment of starting duty.
Advantage of the present invention:
The present invention combines the motor that these two kinds of solid rotors and cage rotor motor have different startings and operation characteristic cleverly, proposition and use bi-motor relay starting or bi-motor start simultaneously, single motor running technology, start and move on these two links and bring into play advantage separately, abandon shortcoming, no slip-ring brush, rotor does not have winding, be convenient to maintenance and reliable, really solved the difficult problem that " starting " " RUN " " reliability " three of long-term puzzlement electromechanics trade can not get both, execution mode is simple, be easy to promote, can satisfy the operating mode of various loaded startings fully.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the outside electric power network schematic diagram of motor of the present invention;
Among the figure: 1 solid rotor electric machine, 2 shaft couplings, 3 cage rotor motors
FU fuse KM1 A.C. contactor KM2 A.C. contactor KM3 A.C. contactor XL reactor M1 cage rotor motor M 2 solid rotor electric machines
Embodiment
With the be applied as example of the present invention on 6000 volts of high-voltage three-phase asynchronous motors of 280 kilowatt of 8 utmost point its frame mode and starting operation method thereof are described, but the present invention is not restricted to this motor.
The solid rotor electric machine 1 of known configurations is connected the common motor that constitutes a coaxial operation with cage rotor motor 3 by shaft coupling 2 coaxial lines among Fig. 1.The solid rotor asynchronous machine, adopt the twin shaft of both-end shaft to stretch structure, a shaft extension is connected with cage rotor motor 3 output shaft extensions by shaft coupling 2, and another shaft extension is to load output and transmitting torque, and solid rotor electric machine 1 (actuating motor) is only worked in starting process.
Solid rotor electric machine 1 because it works, can only be considered starting performance during design in starting process, make it have optimal starting performance index, and this routine index is: 2.1 times of starting torque multiples, 3.5 times of starting current times.
The cage rotor motor is the common cage rotor asynchronous motor of the accurate design of a station symbol among Fig. 1, has optimum running performance index, this example completely presses operating index to be: every index satisfies country and industry standard, wherein the starting torque multiple is 1.1 times, 4.3 times of starting current times, starting quality factor only are 0.26.Adopt series reactor that electric moter voltage is reduced to 60% rated voltage in the starting process and carry out reduced voltage starting.
Fig. 2 is the outside electric power network schematic diagram, be in series with A.C. contactor KM2 on the three-phase ac power cord of solid rotor electric machine M2, be in series with reactor XL (step-down equipment) and A.C. contactor KM1 on the three-phase power line of cage rotor motor M 1, KM1 and XL series connection back are in parallel with KM2 through fuse FU outside electric power network, are parallel with A.C. contactor KM3 on the reactor XL.
Starting operation method 1: bi-motor relay starting, the operation of single motor
The starting of solid rotor electric machine unit: during starting, A.C. contactor KM2 action inserts electrical network with solid rotor electric machine M2,3.5 times of starting current times, and 2.1 times of starting torque multiples, starting quality factor reaches 0.6.If the load near rated speed is the constant torque load of nominal torque, motor will be in 85% rated speed stable operation, and running current is 1.4 times of rated current.
Cage rotor motor relay starting: after the solid rotor electric machine M2 stable operation, A.C. contactor KM1 action inserts electrical network with series reactor XL and cage rotor motor M 1, and motor accelerates near the rated speed operation, and starting process finishes.Owing to be under 85% rated speed, to carry out reduced voltage starting with 60% rated voltage, cage rotor electric motor starting electric current multiple only is 1.6 times, add 1.4 times of the running current multiples of this rotating speed of solid rotor electric machine, this moment, the power network current multiple was 3.0 times, still less than initial start electric current multiple.
Switch to unit operation: after starting process finishes, A.C. contactor KM3 action, excision series reactor XL, motor will speed up to the rated speed operation, realizes the two-shipper cooperation under the full voltage, this moment is for solid rotor electric machine M2, the rotor slippage is less, and the load of being born is very little, near running on Light Condition, but to from electrical network, draw reactive power, make the runnability variation.So after treating assisted running steadily, A.C. contactor KM2 moves once more solid rotor electric machine M2 is excised from electrical network, the independent run with load of squirrel-cage motor M1 full voltage obtains optimum runnability.
Starting operation method 2: bi-motor starts simultaneously, the operation of single motor
In order to obtain bigger starting torque, adopt the full voltage starting simultaneously of cage rotor motor and solid rotor electric machine two-shipper, the electrical network starting current times is 7.8 times, and the starting torque multiple is 3.2 times, and starting quality factor is 0.41.Motor accelerates to the rated speed operation, and starting process finishes.Excise solid rotor electric machine this moment from electrical network, switch to the operation of cage rotor motor list motor, obtains optimum runnability.
Starting operation method 1 has optimum starting quality factor and good operating index, though the secondary pulse electric current is arranged when relay is started, but to the impulse current of electrical network less than the initial start electric current, the starting current of squirrel-cage motor self is littler, motor windings starting heating and withstand shocks forr a short time, motor is more reliable.Starting operation method 2 has good operating index equally, and do not have the secondary pulse electric current, outstanding feature is the starting torque maximum, but the very big starting quality factor variation of starting current, corresponding reliability is variation also, only is applicable to starting torque is required extra high indivedual operating mode.The more important thing is as long as the opportunity that changes starting and switch, can on a complete equipment, be convenient to use any starting method, this point is particularly useful for that static load changes king-sized equipment such as wet ball mill, in the time of can't starting with starting operation method 1, can adopt the heavier load of starting operation method 2 startings.
Claims (5)
1, a kind of high starting quality factor motor, it is characterized in that being formed by connecting by the shaft coupling coaxial line by solid rotor electric machine and cage rotor motor, solid rotor electric machine adopts the twin shaft of both-end shaft to stretch structure, and one of them shaft extension is stretched with the cage rotor motor output shaft by shaft coupling and is connected.
2, high starting quality factor motor according to claim 1 is characterized in that described cage rotor motor is in series with step-down equipment.
3, high starting quality factor motor according to claim 1, it is characterized in that being in series with A.C. contactor KM2 on the three-phase ac power cord of solid rotor electric machine M2, be in series with reactor XL and A.C. contactor KM1 on the three-phase power line of cage rotor motor M 1, KM1 and XL series connection back are in parallel with KM2 through fuse FU outside electric power network, are parallel with A.C. contactor KM3 on the reactor XL.
4, the starting method of the described high starting quality factor motor of a kind of claim 1, it is characterized in that at first the solid rotor electric machine unit is completely pressed startup, after the solid rotor electric machine stable operation, the cage rotor motor begins reduced voltage starting and the cage rotor motor is accelerated to rated speed, starting process finishes, and excises the step-down equipment on the cage rotor motor and the running of solid rotor electric machine then successively and makes the independent run with load of cage rotor motor full voltage.
5, the starting method of the described high starting quality factor motor of a kind of claim 1, it is characterized in that the full voltage starting simultaneously of cage rotor motor and solid rotor electric machine two-shipper, motor accelerates to the rated speed operation, starting process finishes, then solid rotor electric machine is excised from electrical network, switch to the operation of cage rotor motor list motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810014323A CN101521444A (en) | 2008-03-01 | 2008-03-01 | Motor with high starting quality factor and starting method thereof |
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| CN200810014323A CN101521444A (en) | 2008-03-01 | 2008-03-01 | Motor with high starting quality factor and starting method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868267A (en) * | 2012-09-28 | 2013-01-09 | 北京交通大学 | Multi-power solid rotor and laminated rotor tandem type permanent magnet synchronous motor system |
| CN104158734A (en) * | 2014-08-06 | 2014-11-19 | 杭州华三通信技术有限公司 | Method and equipment for quick heavy route of traffic engineering |
| CN104737423A (en) * | 2012-10-12 | 2015-06-24 | 国际计测器株式会社 | Two-output-shaft motor, motor unit, power simulator, torsion testing device, rotational torsion testing device, tire testing device, linear actuator and vibration device |
| CN111835169A (en) * | 2020-07-31 | 2020-10-27 | 江西双威电机有限公司 | Low-energy-consumption three-phase asynchronous motor |
-
2008
- 2008-03-01 CN CN200810014323A patent/CN101521444A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868267B (en) * | 2012-09-28 | 2015-06-17 | 北京交通大学 | Multi-power solid rotor and laminated rotor tandem type permanent magnet synchronous motor system |
| CN102868267A (en) * | 2012-09-28 | 2013-01-09 | 北京交通大学 | Multi-power solid rotor and laminated rotor tandem type permanent magnet synchronous motor system |
| CN108616194A (en) * | 2012-10-12 | 2018-10-02 | 国际计测器株式会社 | Motor unit, torsion test device, linear actuators and vibrating device |
| CN104737423A (en) * | 2012-10-12 | 2015-06-24 | 国际计测器株式会社 | Two-output-shaft motor, motor unit, power simulator, torsion testing device, rotational torsion testing device, tire testing device, linear actuator and vibration device |
| TWI623178B (en) * | 2012-10-12 | 2018-05-01 | 國際計測器股份有限公司 | Electric motor unit, engine simulator, torsion tester, rotational torsion tester, linear actuator and vibration exciter |
| CN104737423B (en) * | 2012-10-12 | 2018-05-29 | 国际计测器株式会社 | Twin shaft output motor, motor unit, dynamic simulator, torsion test device, rotation torsion test device, Tire testing device, linear actuators and vibrating device |
| CN108663147A (en) * | 2012-10-12 | 2018-10-16 | 国际计测器株式会社 | Torque given unit, driving device and Tire testing device |
| TWI697179B (en) * | 2012-10-12 | 2020-06-21 | 日商國際計測器股份有限公司 | Torque imparting unit, driving device and tire testing device |
| CN108616194B (en) * | 2012-10-12 | 2021-04-20 | 国际计测器株式会社 | Motor unit, torsion testing device, linear actuator and vibration device |
| TWI742658B (en) * | 2012-10-12 | 2021-10-11 | 日商國際計測器股份有限公司 | Driving system, mechanical tester, tire tester, load applying section and engine simulator |
| CN104158734A (en) * | 2014-08-06 | 2014-11-19 | 杭州华三通信技术有限公司 | Method and equipment for quick heavy route of traffic engineering |
| CN104158734B (en) * | 2014-08-06 | 2019-05-07 | 新华三技术有限公司 | A kind of traffic engineering fast rerouting method and equipment |
| CN111835169A (en) * | 2020-07-31 | 2020-10-27 | 江西双威电机有限公司 | Low-energy-consumption three-phase asynchronous motor |
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Open date: 20090902 |