CN2664271Y - Brushless three-phase wound rotor torque induction motor for tower crane - Google Patents
Brushless three-phase wound rotor torque induction motor for tower crane Download PDFInfo
- Publication number
- CN2664271Y CN2664271Y CN 03237402 CN03237402U CN2664271Y CN 2664271 Y CN2664271 Y CN 2664271Y CN 03237402 CN03237402 CN 03237402 CN 03237402 U CN03237402 U CN 03237402U CN 2664271 Y CN2664271 Y CN 2664271Y
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- rotor
- coil
- brushless
- induction motor
- tower crane
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- Expired - Fee Related
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Abstract
A brushless three-phase wound rotor torque induction motor for tower crane, the utility model relates to the rotor structure of an induction motor, each coil of the rotor wound group is connected in parallel by two stator coils, wherein one stator coil has more coil turns, the other stator coil has less coil turns, z two coils are uniformly distributed in z two rotor grooves to constitute z two symmetric wound groups, the brushless three-phase wound rotor torque induction motor for tower crane which is produced according to the utility model has no collector ring and no brush holder device, which does not require the outer series-wound impedance and the rotor control device when running, the utility model is of simple system, reliable running, stable starting process, and wide regulating range, and has the characteristic of the rolling torque motor.
Description
Technical field
The utility model belongs to a kind of wound rotor moment threephase asynchronous rotor structure.
Background technology
At present, the more employing wound rotor three-phase asynchronous motor of tower crane rotating mechanism drives.Must be during operation by control loop with external impedance through brush and collector ring and rotor three-phase around being connected, increase rotor impedance, realize increasing starting torque or regulate torque curve, simultaneously the starting current or the running current of restrictions motor.This electric motor structure complexity must have collector ring and brush-holding device, necessary supporting outer meeting resistance and rotor control device during the motor operation, and the system configuration complexity needs often to safeguard that operational reliability is relatively poor, and the cost height.
Summary of the invention
The purpose of this utility model is to propose a kind of wound rotor structure, the wound rotor motor that adopts this structure to make, absence of collector, no brush carrier device, need be in rotor loop guest performer impedance yet, can present the rotor high resistance automatically, low starting current can be arranged, the output characteristic of high starting torque or torque motor.
Realize concrete technical scheme of the present utility model, this tower crane brushless winding rotor torque threephase asynchronous that is used for, its rotor winding is made of z2 coil, and each coil is made of two subcoils, and one of them subcoil number of turn is more, and a circle is arranged; Another subcoil number of turn is less, and the b circle is arranged; Two subcoils are along connecing and be unified into a coil, and corresponding to a phase winding of rotor, z2 the coil that is evenly distributed in the rotor z2 groove constitutes the symmetrical winding of z2.
The wound rotor moment threephase asynchronous of the utility model design has unique electric property, can reduce rotating speed automatically and increase the output torque when load torque increases.Motor is from beginning near synchronous speed till near stall, can both stable operation; Locked-rotor torque is big, and locked rotor current is little.As the YZRT132M2-6 brushless winding rotor torque threephase asynchronous of trial-production, its stall square Mst=102N.m, locked rotor current Ist=22.5A, the mechanical characteristic of motor are the soft start characteristic of a coiling torque motor.The tower crane rotating mechanism adopts this motor driven, and not only speed adjustable range is wide, and speed regulation process is steady, accurate positioning, and system is simple, and is reliable, and reduced motor manufacturing and electric machine control system cost.
Description of drawings
Fig. 1 the utility model is corresponding to a phase winding schematic diagram of rotor;
Z2 the coil that Fig. 2 the utility model is evenly distributed in the rotor z2 groove constitutes the symmetrical winding schematic diagram of z2.
Embodiment
The utility model in force, the rotor winding of threephase asynchronous produces induced potential because of the stator rotating magnetic field, the different numbers of turn are positioned at two of groove and will produce identical, the big or small unequal induced electromotive force of phase place along connecing bridging coil on two, if wherein the multiturn coil induced electromotive force is Ea, few circle subcoil induced electromotive force is Eb, Ea＞Eb, the synthetic electromotive force in the loop of being made up of two coils is Ea-Eb, synthetic electromotive force constitutes in the loops at two bridging coils and forms circulation.Rotor winding effective turn reduces, and the effective turn of each coil is reduced to the a-b circle by original a+b circle, because square being inversely proportional to the rotor parameter of converting stator of rotor winding effective turn, at this moment the rotor resistance of converting stator will enlarge markedly.
Claims (1)
1, a kind of tower crane brushless winding rotor torque threephase asynchronous is characterized in that each coil of rotor winding is made of two subcoils, and one of them subcoil number of turn is more, and a circle is arranged; Another subcoil number of turn is less, and the b circle is arranged; Two subcoils are along connecing and be unified into a coil, and corresponding to a phase winding of rotor, z2 the coil that is evenly distributed in the rotor z2 groove constitutes the symmetrical winding of z2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03237402 CN2664271Y (en) | 2003-09-18 | 2003-09-18 | Brushless three-phase wound rotor torque induction motor for tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03237402 CN2664271Y (en) | 2003-09-18 | 2003-09-18 | Brushless three-phase wound rotor torque induction motor for tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2664271Y true CN2664271Y (en) | 2004-12-15 |
Family
ID=34326461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03237402 Expired - Fee Related CN2664271Y (en) | 2003-09-18 | 2003-09-18 | Brushless three-phase wound rotor torque induction motor for tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2664271Y (en) |
-
2003
- 2003-09-18 CN CN 03237402 patent/CN2664271Y/en not_active Expired - Fee Related
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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 |