CN1144988A - Rotor frequency conversion regulation and control type motor - Google Patents
Rotor frequency conversion regulation and control type motor Download PDFInfo
- Publication number
- CN1144988A CN1144988A CN 96117559 CN96117559A CN1144988A CN 1144988 A CN1144988 A CN 1144988A CN 96117559 CN96117559 CN 96117559 CN 96117559 A CN96117559 A CN 96117559A CN 1144988 A CN1144988 A CN 1144988A
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- rotor
- stator
- phase
- winding
- frequency
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- 238000006243 chemical reaction Methods 0.000 title 1
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000000819 phase cycle Methods 0.000 abstract description 4
- 238000004870 electrical engineering Methods 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention relates to a motor in the field of electrical engineering. The main structure of the motor comprises a stator consisting of a stator core and three-phase windings symmetrically arranged in the stator core and a wound rotor coaxially arranged in the stator, wherein an exciting current converter powered by an external power supply is connected to a winding end wire of the wound rotor. By applying an exciting current to the rotor winding, the phase sequence and frequency of which can be changed, a rotating magnetic field is formed, the direction and the rotating speed of which can be changed, thereby changing the running condition of the rotor. Has the advantages of easy start, simple and convenient speed change, high efficiency and the like. The speed changer is particularly suitable for occasions with frequent speed change and requirements for quick reversing operation.
Description
The present invention relates to the motor in a kind of electrotechnics field.
Existing motor is made of stator and the coaxial phase-wound rotor that is located in the stator, stator is made of stator core and three phase windings that are symmetricly set in the stator core, by in three phase windings of stator, feeding three-phase current, form a rotating magnetic field in the air gap between stator and rotor, make rotor rotation output torque.The less than one of this motor is that its starting current is big, is generally 4～7 times of rated current, and so big starting current can cause the bigger loss of voltage on power transmission line, make the motor starting difficulty; For improving excellent start performance, the existing practice is the starting equipment of series resistor or frequency sensitive trheostat and so in rotor circuit, the structure more complicated, and cause power loss.It two is that its speed adjusting performance is poor, and the optimal method of generally acknowledging is to adopt the friendship-straight-alternation frequency speed adjusting technique that be connected in series a frequency-variable controller bigger than motor capacity between motor and electrical network at present.This mode requires the capacity of frequency-variable controller big, and the cost height also will consume a large amount of reactive powers, and electrical network is caused certain pollution, and reliability is also not really desirable.
In view of the above-mentioned deficiency of existing motor, the purpose of this invention is to provide a kind of rotor variable-frequency adjusting controlled motor easy, that speed change is easy that starts.
The objective of the invention is to be achieved through the following technical solutions: the formation of rotor variable-frequency adjusting controlled motor comprises by stator core, symmetry and is located at stator and the coaxial phase-wound rotor that is arranged in the stator that three phase windings in the stator core constitute, and also is connected to an exciting current switching controller by an external power source on the winding end line of described phase-wound rotor.This exciting current switching controller can be served as by a voltage-type frequency-variable controller, and the rotor winding can select for use three-phase winding or two-phase winding all can.Power network current adds to stator winding during work, fixed, produce a rotating speed and all constant rotating magnetic field of direction in the air gap between the rotor, power to the exciting current switching controller by an external power source simultaneously, apply a phase sequence to the rotor winding, the three phase excitation alternating current that frequency is all adjustable, thereby produce the rotating magnetic field that its rotating speed and direction all are controlled by this exciting current again, rotor then turns round under the composite action of these two rotating magnetic fields, by regulating the phase sequence of exciting current, frequency can make the rotating speed of the rotating magnetic field that is produced by exciting current and direction obtain changing, thereby the operating condition of rotor is also changed thereupon.
Motor of the present invention adopts the voltage-type frequency-variable controller to rotor winding incoming frequency and the adjustable three-phase alternating current of phase sequence, can realize asynchronous, low synchronous and supersynchronous operation.Test result shows that excitation institute wasted work rate only is about 2% of motor power (output), compare with the existing mode that on stator, is connected in series frequency-variable controller, the power that requires of frequency-variable controller is reduced greatly, and starting current also only is 1～2 times of rated current, fully can across-the-line starting.Still can realize four-quadrant operation,, improve power factor (PF) to electrical network output leading reactive power.It is frequent and require the occasion of commutation operation fast to be specially adapted to speed change.
Provide embodiment below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present invention
As shown in Figure 1, stator 1 of the present invention and rotor 2 are all continued to use the version of existing asynchronous motor, and the rotor winding can adopt three-phase or two-phase winding, and exciting current switching controller 3 is served as by a voltage-type frequency-variable controller.Powered to voltage-type frequency-variable controller 3 by an external power source 4 during work, power network current connects the motor stator winding, by regulating 3 operating conditions that can change motor rotor of frequency-variable controller.
Claims (4)
1, a kind of rotor variable-frequency adjusting controlled motor, comprise by stator core and symmetry being located at stator and the coaxial phase-wound rotor that is arranged in the stator that three phase windings in the stator core constitute, it is characterized in that also being connected to an exciting current switching controller on the winding end line of described wound rotor by an external power source.
2, rotor variable-frequency adjusting controlled motor as claimed in claim 1 is characterized in that described exciting current switching controller is a voltage-type frequency-variable controller.
3, rotor variable-frequency adjusting controlled motor as claimed in claim 1 is characterized in that described rotor winding is a three-phase rotor winding.
4, rotor variable-frequency adjusting controlled motor as claimed in claim 1 is characterized in that described rotor winding is a two-phase rotor winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117559 CN1144988A (en) | 1996-05-16 | 1996-05-16 | Rotor frequency conversion regulation and control type motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117559 CN1144988A (en) | 1996-05-16 | 1996-05-16 | Rotor frequency conversion regulation and control type motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1144988A true CN1144988A (en) | 1997-03-12 |
Family
ID=5124400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117559 Pending CN1144988A (en) | 1996-05-16 | 1996-05-16 | Rotor frequency conversion regulation and control type motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1144988A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022179201A1 (en) * | 2021-02-23 | 2022-09-01 | 歌尔股份有限公司 | Voice coil electric motor, and control method and control apparatus therefor |
-
1996
- 1996-05-16 CN CN 96117559 patent/CN1144988A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022179201A1 (en) * | 2021-02-23 | 2022-09-01 | 歌尔股份有限公司 | Voice coil electric motor, and control method and control apparatus therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |