CN2229118Y - Double-speed three-phase asynchronous motor for lifter for construction - Google Patents
Double-speed three-phase asynchronous motor for lifter for construction Download PDFInfo
- Publication number
- CN2229118Y CN2229118Y CN 95211869 CN95211869U CN2229118Y CN 2229118 Y CN2229118 Y CN 2229118Y CN 95211869 CN95211869 CN 95211869 CN 95211869 U CN95211869 U CN 95211869U CN 2229118 Y CN2229118 Y CN 2229118Y
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- China
- Prior art keywords
- motor
- stator
- speed
- rotor
- phase asynchronous
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- Expired - Fee Related
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- 238000010276 construction Methods 0.000 title abstract 2
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model relates to a double-speed three-phase asynchronous motor for lifters for construction, which comprises a casing (1), a stator (2), a rotor (3), blades (5), an electromagnetic brake (6), and stator coils (4) which are formed into pole changing structure from 4 poles to 8 poles by connection. The rotary speed of the motor can be converted depending on changing poles, four-pole state is adopted when an elevator operates in uniform speed, the state can be converted into eight-pole slow state when the motor starts or stops operating, so the impact force can be reduced when the motor starts or stops operating.
Description
The utility model relates to the structure of the threephase asynchronous that a kind of building hoist uses.
Building hoist threephase asynchronous commonly used is as power, and motor is installed in the cage that lifting uses.Motor commonly used, impulsive force is bigger when starting and stopping, and moves steady inadequately.
The purpose of this utility model is to propose a kind of double speed three phase asynchronous motor that is used for building hoist, utilizes its gearshift performance.Can adopt and start at a slow speed and stop and normal speed operation, to reduce impulsive force.
This building hoist comprises shell, stator, rotor, fan blade and electromagnetic brake with double speed three phase asynchronous motor, the wire casing of stator is embedded with stator coil, rotor is loaded in the stator, the tail end of rotor is equipped with fan blade, electromagnetic brake is in the fan blade back, and described stator coil connects into four utmost points---ends of the earth pole-changing structure.
This motor is owing to adopt four utmost points-ends of the earth pole-changing structure, the synchronous speed of motor can be by changing mode of connection conversion between per minute 750 commentaries on classics and per minute 1500 commentaries on classics, thereby at the uniform velocity adopt four states extremely fast during lifting at lift, when starting or stopping, convert the slow running state of the ends of the earth to, the impulsive force in the time that starting and stopping can being reduced.
Accompanying drawing 1 is the overall structure figure of this motor;
Accompanying drawing 2 is the winding diagram of a phase stator coil of this motor;
Accompanying drawing 4 is the catenation principle figure of threephase stator coil.
As shown in Figure 1, in the shell (1) of this building hoist with double speed three phase asynchronous motor stator (2), rotor (3), fan blade (5) and electromagnetic brake (6) are arranged.The wire casing of stator is embedded with stator coil (4).
Figure 2 shows that the winding diagram of a phase coil of this four utmost points-ends of the earth change pole motor stator.The coil of one phase is divided into four parts, presses wiring shown in the figure.Each part can comprise several coils.When power supply is received U1 and V1 two ends, the sense of current is shown in solid arrow among the figure, and be the ends of the earth state this moment: the sense of current is all identical in four groups of coils, thereby electromagnetism polarity is identical, form opposite polarity another magnetic pole between per two groups of adjacent windings, thereby the magnetic field of stator becomes ends of the earth state.If end points U1 is linked to each other with V1, power supply is received between U1 and the U2, then has the electric current in a pair of coil to change direction, shown in dotted arrow among the figure, so the magnetic field of stator becomes four utmost points.
As Fig. 8 and shown in Figure 4, the mode of connection of the three-phase coil of this motor is △/YY shape connection: the joining successively end to end of three groups of coils, become delta connection, when receiving these three terminals U1, V1, W1 on the three-phase power line, be ends of the earth motor, if with U1, V1, W1 and lump together, and transition joint U2, V2, W2 are received on the three-phase power line, be four-pole motor, this moment, stator coil became two groups of star parallel waies, and the conversion of this four utmost points-ends of the earth can realize in the control cubicle of motor.
After adopting the pole-changing windings structure, the power output of motor can reduce, for the power output that makes motor remains unchanged, and the suitable length of elongated rotor iron core.The ratio that generally can choose core length and core-diameter is 1.9～2.06: 1.And this ratio of general motor is 0.77～0.97: 1.In addition, the flute profile of rotor can adopt the less flute profile in cross section, and the cast aluminium bar in the rotor can adopt the cast aluminium alloy of high resistivity, and for example selecting resistivity for use is 0.093 Ω mm
2The cast aluminium of/M.Like this, starting torque is increased, starting current reduces, and excellent start performance is just better.
Lift the concrete parameter of a this building hoist below with double speed three phase asynchronous motor:
Support height of center: 132mm;
Number of stator slots: 36 grooves;
Rotor core diameter: 136mm;
Rotor core length: 270mm;
Rotor core L/D ratio value: 1.985: 1.
Rated voltage: 380V;
The performance of this motor is:
| During the operation of 4 utmost points | During the operation of 8 utmost points | |||
| The coil connection | YY | △ | ||
| Work quota | S1 | S3(25％) | S1 | S3(25％) |
| Rated power (KW) | 7.5 | 9.5 | 3.7 | 4.7 |
| Rated current (A) | 16.4 | 21.9 | 15.4 | 17.1 |
| Rated speed (r/min) | 1350 | 675 | ||
| Locked-rotor torque/nominal torque | 3.4 | 2.6 | 4.2 | 3.3 |
| Breakdown torque/nominal torque | 3.4 | 2.6 | 4.2 | 3.3 |
| Locked rotor current (A) | 80 | 60 | ||
Claims (2)
1, a kind of building hoist double speed three phase asynchronous motor, comprise shell (1), stator (2), rotor (3), fan blade (5) and electromagnetic brake (8), the wire casing of stator is embedded with stator coil (4), the tail end of rotor is equipped with fan blade (5), electromagnetic brake is in the fan blade back, it is characterized in that described stator coil (4) connects into four utmost points-ends of the earth pole-changing structure.
2, building hoist double speed three phase asynchronous motor as claimed in claim 1, the ratio that it is characterized in that described rotor core length and core-diameter is 1.9-2.06: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95211869 CN2229118Y (en) | 1995-05-24 | 1995-05-24 | Double-speed three-phase asynchronous motor for lifter for construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95211869 CN2229118Y (en) | 1995-05-24 | 1995-05-24 | Double-speed three-phase asynchronous motor for lifter for construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2229118Y true CN2229118Y (en) | 1996-06-12 |
Family
ID=33862224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95211869 Expired - Fee Related CN2229118Y (en) | 1995-05-24 | 1995-05-24 | Double-speed three-phase asynchronous motor for lifter for construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2229118Y (en) |
-
1995
- 1995-05-24 CN CN 95211869 patent/CN2229118Y/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 |