CN2251832Y - Cage rotor asynchronous adjustable-speed motor - Google Patents
Cage rotor asynchronous adjustable-speed motor Download PDFInfo
- Publication number
- CN2251832Y CN2251832Y CN 95240905 CN95240905U CN2251832Y CN 2251832 Y CN2251832 Y CN 2251832Y CN 95240905 CN95240905 CN 95240905 CN 95240905 U CN95240905 U CN 95240905U CN 2251832 Y CN2251832 Y CN 2251832Y
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- motor
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- iron core
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Abstract
The utility model relates to a squirrel cage rotor asynchronous speed regulating motor. In the utility model, the periphery of a rotor is sheathed with two stator iron cores which are same with the slot number of a three-phase winding, the windings of the two stator iron cores use respectively head end and tail end to be connected with a power supply, the windings comprise a motor main winding and a speed regulating winding, and the iron core which is provided with the speed regulating winding can be coaxially rotated with the rotor. The utility model controls the phase and value of quadric electrical potential generated by the speed regulating winding in the conducting bar of the rotor by changing a motor angle between the iron core which is provided with the speed regulating winding and the iron core which is provided with the motor main winding or changing the power supply voltage of the speed regulating winding, thus rotation difference ratio is changed, and therefore, the purpose of speed regulation is achieved.
Description
The utility model belongs to threephase asynchronous, relates to a kind of organization plan of cage rotor asynchronous speed-regulating motor.
Threephase asynchronous of the prior art divides phase-wound rotor and cage rotor two big classes, its rotating speed all is lower than synchronous speed, belong to and decide the rotating speed motor, additional speed regulating device carry out frequency conversion is arranged, becoming revolutional slip and these several modes of pole-changing logarithm of speed governing on fixed basis of changeing.One, pole-changing logarithm are the wiring that changes the stator coil, thereby change motor speed, and shortcoming is to carry out stepless speed regulation, so use wideless.Its two, become the revolutional slip mode, comprise two kinds of means again: a kind of is variable voltage speed control, promptly by a cover electronic component supply voltage of access motor is reduced, thereby obtain speed governing, shortcoming is that the velocity variations scope is little, the consumption slip power is big, and efficient is lower, causes range of application to be restricted; Another kind is the tandem control of phase-wound rotor asynchronous motor, it is that the rotor three-phase secondary current is drawn rectification inversion again by slip ring, slip power is fed back power-supply system, so its speed efficiency is higher, and can be used for the occasion that the supply voltage grade is 6KV or 10KV, weak point is that power factor reduces with speed.Its three, the frequency conversion adjustment is to utilize electronic devices and components to change the supply frequency that rate inserts motor, thereby realizes stepless speed regulation, and the power-efficient of original motor is not had big influence.Shortcoming is the apparatus structure complexity; Can not adapt to large-size machine; Element is pressed with limit when bearing, only about 1KV; Multiple harmonic is arranged to system feedback in the frequency-variable electronic circuit, constitute pollution, also can increase the power of motor loss power supply.
The purpose of this utility model is to propose a kind of cage rotor asynchronous speed-adjustable motor simple in structure, the advantage that makes it have known frequency control concurrently and become the revolutional slip speed regulating device, it can be to the system feedback slip power, raise the efficiency, simultaneously can also feed back reactive power, guarantee High Power Factor, preceding two kinds of mode of speed regulation inherent shortcomings are remedied.
The particular content of technical solution of the present utility model is to design a kind of like this squirrel-cage rotor asynchronous motor, it is characterized in that: the rotor periphery at described motor is set with two stator iron cores that three-phase slot for winding number is the same, winding on two iron cores inserts power supply with head end and tail end respectively, one of them winding is the motor main winding, another winding is the speed governing winding, and this speed governing winding iron core has the mechanism that can make self and rotor realize coaxial rotation.
According to above-mentioned basic structure scheme, just can control the speed governing winding produces the secondary electromotive force in rotor bar phase place or size to electrical phase angle between the main winding iron core or speed governing winding supply power voltage by changing speed governing winding iron core, then change the rate revolutional slip, finally reach the purpose of speed governing.The former realizes that by rotate speed governing winding iron core in 360 ° of scopes it can accomplish to be lower than or to surpass the stepless speed regulation of synchronous speed; The latter is connected a step-down voltage regulator between speed governing winding and power supply network, realize speed governing by the size of adjusting voltage regulator secondary voltage output valve, and this mode can only be used for the speed governing of low synchronous speed.Mode with reference to preceding a kind of phase modulation position also can not add tumbler on speed governing winding iron core, at this moment, when to motor assembling examination speed, as required to the electrical phase angle one-time positioning, can derive any speed motor product.
Advantage of the present utility model is: simple in structure, reliable, easy to maintenance, simple to operation, change revolutional slip speed governing type though belong to, but it can be to system feedback slip power and reactive power, energy-saving effect is remarkable, can be applicable to the power-supply system of 6KV or 10KV again, these advantages, frequency control does not possess.In dynamic and static loop, do not have the contact of rotation simultaneously, can't accomplish so unrestricted this of capacity also is commutator buncher and winding type rotor serial connection buncher.
Accompanying drawing provides specific embodiment of the utility model.
Fig. 1 is the cage rotor asynchronous speed-regulating motor overall structure schematic diagram (front view) of present embodiment;
Fig. 2 is the bolt schematic diagram (front view) that there is ball termination shown in the label 3 among Fig. 1.
As shown in drawings, rotor 2 peripheries in the support of a squirrel-cage rotor asynchronous motor are set with two the same stator iron cores of three-phase stator slot for winding number, and the winding that they are installed separately is main winding 1 and speed governing winding 5; The iron core of speed governing winding 5 wherein, it by means of a plurality of be connected on the support and adjusting bolt 3 that the termination has a ball 6 by support among support, and keep concentrics with rotor 2 so that its can be by coaxial rotation arbitrarily angled and stop location.The outside of speed governing winding 5 iron cores connects with worm gearing 4 and cooperates, this transmission device adopts the stepping motor in the known technology to do power source, the rotation of specific implementation speed governing winding 5, thus the electrical phase angle between change and the main winding 1 reaches the purpose to electric machine speed regulation.
Claims (2)
1, a kind of cage rotor asynchronous speed-regulating motor, it is characterized in that: the rotor periphery at described motor is set with two stator iron cores that three-phase slot for winding number is the same, winding on two iron cores inserts power supply with head end and tail end respectively, one of them winding is the motor main winding, another winding is the speed governing winding, and this speed governing winding iron core has the mechanism that can make self and rotor realize coaxial rotation.
2, cage rotor asynchronous speed-regulating motor according to claim 1, it is characterized in that: the iron core of described speed governing winding by means of a plurality of be connected on the support and adjusting bolt that the termination has a ball by support among support, and keep concentric with rotor, the same worm gearing of doing actuating force by stepping motor in the described speed governing winding iron core outside links and cooperates, and constitutes the mechanism that rotates with rotor coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240905 CN2251832Y (en) | 1995-11-16 | 1995-11-16 | Cage rotor asynchronous adjustable-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240905 CN2251832Y (en) | 1995-11-16 | 1995-11-16 | Cage rotor asynchronous adjustable-speed motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2251832Y true CN2251832Y (en) | 1997-04-09 |
Family
ID=33882397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95240905 Expired - Fee Related CN2251832Y (en) | 1995-11-16 | 1995-11-16 | Cage rotor asynchronous adjustable-speed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2251832Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600928A (en) * | 2015-02-16 | 2015-05-06 | 吴积善 | Continuously variable speed dual-rotor motor |
-
1995
- 1995-11-16 CN CN 95240905 patent/CN2251832Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600928A (en) * | 2015-02-16 | 2015-05-06 | 吴积善 | Continuously variable speed dual-rotor motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |