CN1230819A - Adjustable-speed AC motor - Google Patents
Adjustable-speed AC motor Download PDFInfo
- Publication number
- CN1230819A CN1230819A CN 98101219 CN98101219A CN1230819A CN 1230819 A CN1230819 A CN 1230819A CN 98101219 CN98101219 CN 98101219 CN 98101219 A CN98101219 A CN 98101219A CN 1230819 A CN1230819 A CN 1230819A
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- China
- Prior art keywords
- speed
- motor
- rotating speed
- alternating current
- main device
- 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.)
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Abstract
By utilizing the combination of AC motor, speed changing transmission mechanism and corresponding power supply system, double-rotor motor is adjusted. The motor of the present invention has the advantages of squirrel-cage motor as well as small start current and good speed regulating performance. In case of high voltage and large power, the advantages are especially obvious.
Description
The invention belongs to the speed regulating method of alternating current machine.
The present invention is enriching and raising former 85100607 patents of invention.
Former invention is to adopt the birotor cross-compound arrangement, makes the rotating speed of the rotating speed of rotating magnetic field and mechanical rotation superimposed, by controlling the rotating speed of an axle in its twin shaft, changes another rotating speed.
Former invention is not illustrated the rotating speed that how to go to control one of them, and in fact not all device that can speed governing for example by the motor of variable frequency power supply control, under operating mode arbitrarily, can both control effectively to this axle.
The present invention is a method of former invention motor being implemented to control and reduce former invention electric motor starting electric current.
The present invention is with the device of cross-compound arrangement in the former invention, and " variable-frequency motor " in for example former invention is called main device, if by " variable-frequency motor " separately as main device of the present invention, because of the rotation of its winding, its power supply can pass through slip ring, brush-system access.One of them axle of implementing control is called Control Shaft, and another load-carrying axle is called output shaft.The device that connects Control Shaft among the present invention is called servicing unit, has been determined the rotating speed of Control Shaft by servicing unit.
Alternating current machine is connected with main device Control Shaft by variable transmission mechanism, and promptly alternating current machine and variable transmission mechanism constitutes servicing unit of the present invention.
The present invention is made up of above-mentioned main device, servicing unit and corresponding power supply-distribution system.
The present invention is in when operation, and when braking between two in the main device, as the perfectly straight stream braking of main device, at this moment the output shaft synchronous speed is the Control Shaft rotating speed.When main device indirect current, its magnetic field direction of rotation is opposite with the Control Shaft rotary speed direction, and then the output shaft synchronous speed is the poor of the two, if the two direction is identical, then is sum of the two, and when the servicing unit braking, then the output shaft synchronous speed is the synchronous speed of main device.If servicing unit has n synchronous speed, output shaft then of the present invention has 3n+1 synchronous speed.Alternating current machine in the servicing unit for example of the present invention is 4/8 utmost point double-speed motor, the gear ratio of variable transmission mechanism is 5: 2, and then the Control Shaft synchronous speed is 600/300r/min, if main device synchronous speed is 1500r/min, then can obtain 2100 at output shaft, 1800,1500,1200,900,600,300,7 synchronous speeds.This can be had the alternating current machine of 7 synchronous speeds and the combination of variable transmission mechanism and remove to control a main device as servicing unit.If passing on Gong than being 3: 1 of this variable transmission mechanism, if the synchronous speed of this main device is 1500r/min, the output shaft synchronous speed of then another playscript with stage directions invention motor is 2200 to 100, and differential is 22 synchronous speeds of 100.Remove to control main device with this again, can obtain 67 synchronous speeds or the like.By that analogy, can obtain the abundant synchronous speed and the synchronous speed of different series, change gearratio wherein, also can obtain different speed adjustable ranges.
Provide power by servicing unit, two axle relative rotation speeds that make main device near or equal the synchronous speed of main device, main then device is connected alternating current again, the electric current in the time of just reducing asynchronous machine connection AC power promptly reduces the starting current of alternating current machine.For example the Control Shaft of main device rotates output shaft by variable transmission mechanism round about, when Control Shaft when low speed rises to certain rotating speed, the relative rotation speed that main device is two equals or near the synchronous speed of main device, at this moment main device is connected AC power, and will connect main device two shaft drives and withdraw from and make it inoperative.The perfectly straight stream braking of for example main again device, the output shaft that makes main device is with the Control Shaft raising speed, main then device outage, make its output shaft dependence inertia or keep this rotating speed by another motor, and drag the Control Shaft antiport with servicing unit, two relative rotation speeds of main device are equaled or near the synchronous speed of main device, main device is connected alternating current again, and withdraws from the operation of the motor of keeping the output shaft rotating speed.
Motor of the present invention has the advantage of squirrel-cage motor and to have remedied its starting current big, the shortcoming of speed adjusting performance difference.When high pressure moved rate greatly, advantage was particularly outstanding.
Claims (2)
1. a combination that utilizes alternating current machine, variable transmission mechanism and corresponding power supply-distribution system is to having the method that birotor, cross-compound arrangement motor are controlled speed governing.
The present invention has twin shaft, dual-rotor structure, can make rotating magnetic field rotating speed and mechanical rotation rotating speed superimposed and influence the device of output shaft rotating speed.
It is characterized in that adopting the combination of alternating current machine and variable transmission mechanism and corresponding power supply-distribution system,, the output shaft rotating speed is controlled speed governing by the operation conditions of each several part in the modifier.
2. the device of making according to the method for claim 1 is characterized in that making earlier the relative rotation speed of two axles of the alternating current machine with cross-compound arrangement to equal or near its synchronous speed, and then this motor is connected AC power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98101219 CN1230819A (en) | 1998-03-30 | 1998-03-30 | Adjustable-speed AC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98101219 CN1230819A (en) | 1998-03-30 | 1998-03-30 | Adjustable-speed AC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1230819A true CN1230819A (en) | 1999-10-06 |
Family
ID=5216545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98101219 Pending CN1230819A (en) | 1998-03-30 | 1998-03-30 | Adjustable-speed AC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1230819A (en) |
-
1998
- 1998-03-30 CN CN 98101219 patent/CN1230819A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |