CN1321492C - Constant-torque three-speed monopole asynchronous motor - Google Patents
Constant-torque three-speed monopole asynchronous motor Download PDFInfo
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- CN1321492C CN1321492C CNB2004100124316A CN200410012431A CN1321492C CN 1321492 C CN1321492 C CN 1321492C CN B2004100124316 A CNB2004100124316 A CN B2004100124316A CN 200410012431 A CN200410012431 A CN 200410012431A CN 1321492 C CN1321492 C CN 1321492C
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Abstract
The present invention relates to a motor, particularly to a constant-torque three-speed monopole asynchronous motor, which comprises a stator, a rotor, a main winding embedded in a stator groove, a secondary winding and a capacitor connected with the secondary winding in series, wherein the main winding and the secondary winding comprise three windings embedded in the same stator groove. In a running process with low speed, the three windings are connected in series, in the running process with medium speed, the first winding and the second winding are connected in series, and in the running process with high speed, after the second winding and the third winding are connected in series, the second winding and the third winding are connected with the first winding in parallel. The constant-torque three-speed monopole asynchronous motor has the advantages of simple and easy speed adjustment and can achieve the three-speed adjustment by only changing the connection mode of the three windings of the main winding and the secondary winding on a connecting box of the motor or at the lead-out wire end of each winding. Simultaneously, the corresponding slip ratio of the motor under constant torque is large, a running stable area of the motor is also large, and the range of the speed adjustment is wide. The three-speed running efficiencies of the motor are all higher than that of the ordinary monopole asynchronous motor, and the running efficiency of the high speed is particularly excellent and can reach above 70%.
Description
Technical field
The present invention relates to motor, be specially a kind of permanent torque three fast monopole asynchronous motors.
Background technology
The monopole asynchronous motor speed governing mainly contains frequency control, pole changing, variable voltage speed control etc.Frequency control cost height; The pole changing speed spread is big, changing-over line complexity, though the speed governing winding in auxiliary winding or in the main winding connection simple, the motor operational efficiency is lower; Variable voltage speed control need have voltage regulation parts such as reactor, transformer.
Summary of the invention
The present invention is primarily aimed at defective and the deficiency that existing monopole asynchronous motor speed governing exists, and provides a kind of speed governing the convenient and high permanent torque three fast monopole asynchronous motors of operational efficiency.
The present invention adopts following technical scheme to realize: permanent torque three fast monopole asynchronous motors, comprise main winding, auxiliary winding in stator, rotor, the embedding stator slot and the electric capacity that is connected in series with auxiliary winding, main winding and auxiliary winding comprises the three cover windings that embed in the identical stator slot.Three line ends that overlap windings of main winding and auxiliary winding are drawn from the motor outlet box; During use, when motor needed low cruise, three cover windings of main winding were in series, and three cover windings of auxiliary winding are in series, and the voltage that the every circle of winding is born under the constant situation of supply voltage descends the motor low speed rotation; First, second cover winding of main winding and auxiliary winding is in series (throwing the 3rd cover winding away), and the voltage that the every circle of winding is born rises, the operation of motor middling speed; Second, third cover windings in series is in parallel with the first cover winding again, the voltage maximum that the every circle of winding this moment is born, motor high-speed cruising.As can be seen, the three different connected modes of overlapping windings by main winding and auxiliary winding, changed the voltage that the every circle of winding bears (variable voltage speed control of the prior art is realized by regulating supply voltage), therefore, the speed governing of motor of the present invention in fact still belongs to variable voltage speed control.
According to the design of electrical motor theory, in order to regulate rotating speed, when main winding hangs down the number of turn (mainly is under the first cover winding at the present invention), magnetic circuit should be in undersaturated condition.Magnetic loading is on the low side, and especially when being extensive use of cold-rolled silicon iron, the iron loss of motor is lower, also helps improving the operational efficiency of motor.
The high-speed cruising connected mode of motor of the present invention just as winding and increase around radical, the main winding and auxiliary winding cross section increases, resistance reduces, so copper loss is low, operational efficiency is higher during the motor high-speed cruising.For further improving particularly high-speed cruising efficient down of motor, the number of turn that the number of turn of three cover windings of main winding and auxiliary winding satisfies the first cover winding equals second, third and overlaps the umber of turn sum.Like this, under high-speed cruising, the cross section of main winding and auxiliary winding is equivalent to double just.(and when certain capacitance) with this understanding, the efficient of motor high-speed cruising can reach more than 70%.
Permanent torque three fast monopole asynchronous motor speed governing of the present invention are simple, easy row, and the connected mode that only needs terminal box (or each winding draw line end) at motor to locate to change main winding and auxiliary winding three cover windings can realize three velocity modulation speed; Corresponding revolutional slip big (more than 0.4) under this motor breakdown torque simultaneously, the stable region of motor operation is bigger, the speed adjustable range broad.When this motor hangs down the number of turn at main winding, magnetic circuit is unsaturated design, because the connected mode of high-speed cruising is equivalent to the cross section increase of main winding and auxiliary winding, the efficient of motor three speed operations all are higher than common monopole asynchronous motor simultaneously, the efficient of high-speed cruising is especially outstanding, can reach more than 70%.This motor is durable, and short circuit current little (being about 1.1 times rated current) can avoid motor to be subjected to accidental injury because of short circuit.
Description of drawings
A concrete monopole asynchronous motor---the structural representation of external rotor monopole asynchronous motor of Fig. 1 for adopting technology contents of the present invention to make;
The connection diagrams of three of main winding and auxiliary winding cover windings when Fig. 2 is a motor low cruise of the present invention;
The connection diagrams of three cover windings of main winding and auxiliary winding when Fig. 3 is motor middling speed of the present invention operation;
The connection diagrams of three of main winding and auxiliary winding cover windings when Fig. 4 is a motor high-speed cruising of the present invention;
Embodiment
Permanent torque three fast monopole asynchronous motors comprise main winding, auxiliary winding in stator, rotor, the embedding stator slot and the electric capacity that is connected in series with auxiliary winding, and main winding and auxiliary winding comprises the three cover windings that embed in the identical stator slot.
With the line end of three cover windings of main winding and auxiliary winding from the motor outlet box or directly draw, simultaneously with the two ends of electric capacity also from the outlet box of motor or directly draw, so that change the connected mode of winding.Stator winding form among the present invention can adopt known winding configuration, as single, double repeatedly winding, individual layer concentric type winding or individual layer chain type winding.
Embodiment is based on a kind of external rotor monopole asynchronous motor.This external rotor monopole asynchronous motor is 6 utmost points, internal stator 24 grooves, main, it is (main that auxiliary winding respectively accounts for 12 grooves, the shared groove number of auxiliary winding can be selected in design of electrical motor), wherein, the number of turn of three each coil of cover winding of main winding is respectively 116,40,76, the number of turn of three each coil of cover winding of auxiliary winding is respectively 106,36,70, main, the number of turn of three each coil of cover winding of auxiliary winding is determined the motor slow-speed of revolution, in change connected mode motor, high rotating speed is also corresponding to be determined, therefore, main by changing in the design of electrical motor process according to actual needs, the numbers of turn of three cover windings of auxiliary winding are determined different low, in, high rotating speed.This external rotor monopole asynchronous motor is according to the above-mentioned number of turn, and its basic, normal, high rotating speed is respectively 400 ± 10% rev/mins, 620 ± 10% rev/mins, 780 ± 10% rev/mins under certain torque.The winding of this external rotor monopole asynchronous motor adopts individual layer chain type winding.
Along with its torque of reduction of motor speed increases to some extent, but the voltage that the every circle of winding bears under low cruise descends, and impels torque to reduce to some extent again, and therefore, motor of the present invention is the torque substantially constant under three speed.The above-mentioned efficient of locating rotor monopole asynchronous motor low cruise can reach 30-40%, the efficient of middling speed operation can reach 50-60%, and the efficient of high-speed cruising can reach (number of turn that the number of turn of three cover windings of this external rotor monopole asynchronous motor main winding and auxiliary winding satisfies the first cover winding equals second, third cover umber of turn sum) more than 70%.Operational efficiency under three speed all is higher than the existing monopole asynchronous motor under the equal conditions.
The rear end cap of this external rotor monopole asynchronous motor and external rotor casing 3 are made one (disjunctor casts out), and carry out the rotation task, there is the stationary sleeve of stretching out at front end housing 1 middle part, internal stator iron core 4 is fixed on the stationary sleeve, and an end and the rear end cap of main shaft 5 are fixed and are supported on the bearing that is fixed in the stationary sleeve inner chamber.External rotor casing 3 internal fixation have external rotor iron core 2, and three cover windings 6 of main winding and auxiliary winding embed pilot trench decided at the higher level but not officially announced.This external rotor monopole asynchronous motor adopts said structure, and rule is convenient, compact conformation, and parts are few.
Claims (3)
1, a kind of permanent torque three fast monopole asynchronous motors comprise main winding, auxiliary winding in stator, rotor, the embedding stator slot and the electric capacity that is connected in series with auxiliary winding; Number of stator slots equals the groove that main winding and auxiliary winding occupies separately and counts sum, two ends in parallel behind auxiliary winding and the capacitance series, as to be attempted by single phase alternating current power supply with main winding, and it is characterized by: main winding and auxiliary winding comprises the three cover windings that embed in the identical stator slot; Three line ends that overlap windings of main winding and auxiliary winding are drawn from the motor outlet box, simultaneously the two ends of electric capacity are also drawn from the outlet box of motor; During the motor low cruise, three cover windings of main winding are in series, three cover windings of auxiliary winding are in series, during the operation of motor middling speed, first, second cover winding of main winding and auxiliary winding is in series, throw the 3rd cover winding away, during the motor high-speed cruising, that second, third cover windings in series of main winding and auxiliary winding is in parallel with the first cover winding again.
2, permanent torque three fast monopole asynchronous motors as claimed in claim 1 is characterized by: the number of turn that the number of turn of three cover windings of main winding and auxiliary winding satisfies the first cover winding equals second, third cover umber of turn sum.
3, permanent torque three fast monopole asynchronous motors as claimed in claim 1 or 2, it is characterized by: described permanent torque three fast monopole asynchronous motors are the external rotor monopole asynchronous motor, the rear end cap of this external rotor monopole asynchronous motor and external rotor casing (3) are made one, there is the stationary sleeve of stretching out at front end housing (1) middle part, internal stator iron core (4) is fixed on the stationary sleeve, and an end and the rear end cap of main shaft (5) are fixed and are supported on the bearing that is fixed in the stationary sleeve inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100124316A CN1321492C (en) | 2004-07-21 | 2004-07-21 | Constant-torque three-speed monopole asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100124316A CN1321492C (en) | 2004-07-21 | 2004-07-21 | Constant-torque three-speed monopole asynchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1599208A CN1599208A (en) | 2005-03-23 |
| CN1321492C true CN1321492C (en) | 2007-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100124316A Expired - Fee Related CN1321492C (en) | 2004-07-21 | 2004-07-21 | Constant-torque three-speed monopole asynchronous motor |
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| CN (1) | CN1321492C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902197A (en) * | 2009-05-27 | 2010-12-01 | 上海晗琪精密减速电机有限公司 | Speed regulating method and control system of multi-speed single-phase asynchronous motor |
| CN106961195A (en) * | 2017-05-03 | 2017-07-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Single-phase asynchronous motor winding connection in series-parallel changing method, single-phase asynchronous motor and equipment |
| CN110086392B (en) * | 2019-04-26 | 2020-11-27 | 宁德师范学院 | Method for expanding constant-torque variable-frequency speed regulation range by adopting Y-shaped winding with tap connection |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887854A (en) * | 1973-12-03 | 1975-06-03 | Gen Electric | Multi-speed motor |
| JPS5612875A (en) * | 1979-07-12 | 1981-02-07 | Sanyo Electric Co Ltd | Single-phase induction motor |
| CN87212796U (en) * | 1987-11-24 | 1988-08-31 | 山东省文登县科学技术信息服务部 | Single-phase pole-changing speed regulation motor |
| CN1059053A (en) * | 1990-08-14 | 1992-02-26 | 山东省文登市第二电机厂 | Single-phase pole-changing speed-regulating asynchronous motor |
| CN2152340Y (en) * | 1993-03-19 | 1994-01-05 | 上海市电机技术研究所 | Single phase voltage regulating speed regulating motor |
| CN2404256Y (en) * | 2000-01-17 | 2000-11-01 | 刘学洲 | Single-phase capacitor running tap speed-regulating asynchronous motor |
| US20030107286A1 (en) * | 2001-12-06 | 2003-06-12 | Machado Adilson Carlos | Single-phase two-speed electric motor with enhanced coil-winding system |
| CN2562486Y (en) * | 2002-07-17 | 2003-07-23 | 广东美的集团股份有限公司 | Polarity changeable double speed single phase asynchronous motor |
-
2004
- 2004-07-21 CN CNB2004100124316A patent/CN1321492C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887854A (en) * | 1973-12-03 | 1975-06-03 | Gen Electric | Multi-speed motor |
| JPS5612875A (en) * | 1979-07-12 | 1981-02-07 | Sanyo Electric Co Ltd | Single-phase induction motor |
| CN87212796U (en) * | 1987-11-24 | 1988-08-31 | 山东省文登县科学技术信息服务部 | Single-phase pole-changing speed regulation motor |
| CN1059053A (en) * | 1990-08-14 | 1992-02-26 | 山东省文登市第二电机厂 | Single-phase pole-changing speed-regulating asynchronous motor |
| CN2152340Y (en) * | 1993-03-19 | 1994-01-05 | 上海市电机技术研究所 | Single phase voltage regulating speed regulating motor |
| CN2404256Y (en) * | 2000-01-17 | 2000-11-01 | 刘学洲 | Single-phase capacitor running tap speed-regulating asynchronous motor |
| US20030107286A1 (en) * | 2001-12-06 | 2003-06-12 | Machado Adilson Carlos | Single-phase two-speed electric motor with enhanced coil-winding system |
| CN2562486Y (en) * | 2002-07-17 | 2003-07-23 | 广东美的集团股份有限公司 | Polarity changeable double speed single phase asynchronous motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1599208A (en) | 2005-03-23 |
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