CN103855887A - Non-salient pole electromagnetic speed regulator - Google Patents
Non-salient pole electromagnetic speed regulator Download PDFInfo
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- CN103855887A CN103855887A CN201210543931.7A CN201210543931A CN103855887A CN 103855887 A CN103855887 A CN 103855887A CN 201210543931 A CN201210543931 A CN 201210543931A CN 103855887 A CN103855887 A CN 103855887A
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Abstract
A non-salient pole electromagnetic speed regulator is composed of an inner rotor, a non-salient pole outer rotor and an inner rotor shaft. Air gaps are evenly formed between the inner rotor and the outer rotor. The inner rotor comprises an inner rotor winding and an inner rotor iron core, and is the same as a rotor of a traditional alternating current asynchronous motor. The non-salient pole outer rotor comprises a distributed type outer rotor exciting winding, a non-salient pole outer rotor iron core and an outer rotor shell. An iron core slot is formed along the inner circle of the non-salient pole outer rotor iron core. The distributed type outer rotor exciting winding is embedded inside the iron core slot. The distributed type outer rotor exciting winding and an external direct current power source form a loop through a collecting ring and an electric brush which are installed on the outer rotor shell, and the distributed type outer rotor exciting winding can be supplied with direct current exciting current. The N pole and the S pole of a non-salient pole are formed at the unslotted part of the inner circle of the non-salient pole outer rotor iron core. The non-salient pole electromagnetic speed regulator has the advantages of replacing a frequency converter. A motor speed adjusting method is provided and is efficient, saving in energy, firm, reliable, low in cost, capable of achieving starting under no-load and free of electromagnetic interference.
Description
Technical field
The present invention relates to a kind of electromagnetic adjustable speed motor, relate in particular to a kind of hidden pole type electromagnetic adjustable speed motor, can be widely used in the various fields that need speed governing to drive.
Background technology
According to statistics, China's per unit area yield energy consumption is 5 times of developed country, and high for a long time, and the serious waste of electric energy is its one of the main reasons.Taking large fan, water pump as example, its drive motor voltage is the high voltage that exchanges 3～10kV, more than power reaches 3000kW, past is due to the long-term constant-speed drive that adopts, wasted a large amount of electric energy, people extensively adopt variable-frequency power power supply in recent years, make motor low cruise in the time of blower fan, the output of water pump low discharge, make power supply realize low-power output, thereby saved electric energy.But adopt variable-frequency power to be subject to many limitations: the one, all electric energy that pass to load from motor all will carry out power conversion through variable frequency power supply, and the core component that carries out power conversion is high performance electronic power switch device, all dependence on import of these high performance electronic power switch devices, so its price is high for a long time; The 2nd, these electronic power switch devices can produce larger electric energy loss, and are subject to the impact of temperature, voltage, electric current, are easy to damage, and cause the failure rate of variable frequency power supply higher; The 3rd, the technical requirement of variable frequency power supply is high, and complex structure, so cost is very high; The 4th, because power electronic device is operated in high frequency, high voltage, jumbo on off state, a large amount of harmonic pollutions and electromagnetic interference are produced, have a strong impact on the power supply quality of electrical network, and along with the increase of variable frequency power supply power, the harmful effect causing is more serious; The 5th, along with capacity and the voltage of variable frequency power supply improve constantly, the withstand voltage and capacity of power electronic device can not meet the demands.
Occur that in recent years a kind of permanent magnetic speed-adjusting driver can partly overcome these technological deficiencies.This class permanent magnetic speed-adjusting driver adopts permanent magnet to produce magnetic field, and magnetic field is coupled master and slave moving axis through air gap, thereby by regulating air gap to regulate the size of coupled magnetic field to realize speed governing.But it also has shortcoming: the one, and permanent magnet small volume, the torque of generation is less, and speed adjustable range is limited; The 2nd, permanent magnet is heated and long-time running meeting produces the even magnet loss phenomenon that demagnetizes; The 3rd, the mechanical device structure complexity of adjusting air gap.
Summary of the invention
The object of the invention is to overcome prior art deficiency, provide a kind of cost low, simple in structure, durable in use, implement convenient, energy-efficient, speed-regulating range width, be not subject to that voltage and power grade limit, all parts are all domestic hidden pole type electromagnetic adjustable speed motors.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of hidden pole type electromagnetic adjustable speed motor, is made up of internal rotor, hidden pole type external rotor and inner rotor shaft, between described internal rotor and hidden pole type external rotor, forms fixed-size even air gap.
Described internal rotor comprises internal rotor winding and internal rotor iron core, identical with the rotor of conventional AC asynchronous motor; Described internal rotor is enclosed within on inner rotor shaft, and makes an entirety with inner rotor shaft.
Described hidden pole type external rotor comprises distributed external rotor excitation winding, hidden pole type outer rotor iron core and external rotor shell.Described distributed external rotor excitation winding adopts copper or aluminum conductor, and described hidden pole type outer rotor iron core adopts silicon steel sheet or steel alloy, and is fixed on external rotor shell; Inner circle along hidden pole type outer rotor iron core has iron core slot, and described distributed external rotor excitation winding is embedded into described iron core slot the inside; Distributed external rotor excitation winding forms loop by the DC power supply that is contained in collector ring on external rotor shell and brush and outside, provide size adjustable DC excitation electric current to distributed external rotor excitation winding, in the inner circle of hidden pole type outer rotor iron core, do not have slotted part to form stealthy magnetic pole (abbreviation non-salient pole) the N utmost point and the S utmost point.
The invention has the beneficial effects as follows:
1. the present invention can be widely used in the various rotating machinery loads that need speed governing driving, as blower fan, water pump, oil transfer pump, elevator, belt conveyer, drag conveyor, electric automobile and track traffic even load, have that cost is low, simple in structure, durable in use, to implement convenient, energy-efficient, speed-regulating range width, the restriction that is not subject to voltage and power grade, all parts be all the advantage such as domestic.In the situation that prime mover rotating speed is constant, carry out regulating load rotating speed by the size that regulates the exciting current If of hidden pole type electromagnetic adjustable speed motor in the present invention, can replace the widely used frequency-changing speed regulation driver of current people.
2. be zero by regulating exciting current, allow motor no-load start, when electrical motors is after rated speed, progressively increase exciting current, load is stablized and accelerate to required rotating speed.Can significantly reduce rush of current, motor winding heating and mechanical shock in motor starting procedure.
3. by the detection to exciting current and rotating speed, realize the accurate control of rotating speed, be applicable to need the mechanical load of accurate speed governing.By increasing the logarithm of magnetic pole, can obtain the rotating speed higher than prime mover.
4. to pass to the energy of load be all to transmit by the magnetic field between the inner and outer Rotator of electromagnetic adjustable speed motor to all prime mover, instead of carry out transmitting torque by traditional mechanical connection, not only the vibration of equipment and noise reduce greatly, and overcome the problem that in RHVC, all energy all will transmit by fragile, expensive electronic power switch, thereby greatly improve the reliability of equipment.And only have the energy demand of very little excitation field to transmit by simple, reliable field circuit.
5. harmonic pollution and electromagnetic interference problem that RHVC causes have been overcome.
6. manufacture electromagnetic adjustable speed motor of the present invention also very convenient, its manufacturing process can adopt the technical standard of existing manufacture alternating current motor.Its total manufacturing cost, operating cost and maintenance cost are well below the widely used RHVC of current people.
7. the torque that overcome existing permanent magnetic speed-adjusting driver is little, speed adjustable range is narrow, permanent magnet is heated and long-time running meeting produces the loss of excitation even of demagnetizing, regulate the defect such as mechanical device structure complexity of air gap.
Brief description of the drawings
Fig. 1 is embodiments of the invention structural representations;
Fig. 2 is the structural representation of the hidden pole type electromagnetic adjustable speed motor of four magnetic poles (two pairs of magnetic poles) in Fig. 1;
Fig. 3 is the structural representation of the hidden pole type electromagnetic adjustable speed motor that in Fig. 1, inner and outer Rotator structure is exchanged;
Fig. 4 is the structural representation of the hidden pole type electromagnetic adjustable speed motor of four magnetic poles (two pairs of magnetic poles) in Fig. 3.
In figure, 1-internal rotor; 1-1-internal rotor winding; 1-2-internal rotor iron core; 2-hidden pole type external rotor; The distributed external rotor excitation winding of 2-1-; 2-2-hidden pole type outer rotor iron core; 2-3-external rotor shell; 3-air gap; 4-inner rotor shaft; ×, the direction of exciting current in-distributed external rotor excitation winding, "×" represents that electric current flows into paper, " " represents outflow of bus current paper.
Embodiment
Embodiment mono-:
With reference to accompanying drawing 1, a kind of hidden pole type electromagnetic adjustable speed motor, is characterized in that comprising internal rotor 1, hidden pole type external rotor 2 and inner rotor shaft 4, forms fixed-size even air gap 3 between described internal rotor and hidden pole type external rotor.
Described internal rotor 1 comprises internal rotor winding 1-1 and internal rotor iron core 1-2, identical with the rotor of conventional AC asynchronous motor, can be mouse-cage type, winding-type or solid rotor; Described internal rotor 1 is enclosed within on inner rotor shaft 4, and and inner rotor shaft 4 make an entirety.
Described hidden pole type external rotor 2 comprises distributed external rotor excitation winding 2-1, hidden pole type outer rotor iron core 2-2 and external rotor shell 2-3.Described distributed external rotor excitation winding 2-1 adopts copper or aluminum conductor, described hidden pole type outer rotor iron core 2-2 adopts silicon steel sheet or steel alloy, and being fixed on 2-3 on external rotor shell, external rotor shell 2-3 is fixed on outer rotor shaft (outer rotor shaft does not draw in the present embodiment); Inner circle along hidden pole type outer rotor iron core 2-2 has iron core slot, and described distributed external rotor excitation winding 2-1 is embedded into described iron core slot the inside; Distributed external rotor excitation winding 2-1 forms loop by the DC power supply that is contained in collector ring on external rotor shell 2-3 and brush and outside, provide size adjustable DC excitation electric current to distributed external rotor excitation winding 2-1, in the inner circle of hidden pole type outer rotor iron core 2-2, do not have slotted part to form stealthy core magnetic pole (abbreviation non-salient pole) the N utmost point and the S utmost point.
Embodiment bis-:
With reference to accompanying drawing 2, a kind of another kind of embodiment of hidden pole type electromagnetic adjustable speed motor.Two stealthy core magnetic poles (a pair of utmost point) of hidden pole type external rotor 2 in embodiment mono-are increased to four (two pairs of utmost points), by making the current opposite in direction in the excitation winding 2-1 at each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles contrary, form NSNS structure.The rest may be inferred, the quantity of stealthy core magnetic pole can be increased to six (three pairs of utmost points), eight (four pairs of utmost points), ten (five pairs of utmost points), etc.
Embodiment tri-:
With reference to accompanying drawing 3, a kind of another kind of embodiment of hidden pole type electromagnetic adjustable speed motor.The structure of the inner and outer Rotator in embodiment mono-is exchanged, and external rotor adopts the rotor structure of conventional AC asynchronous motor, and internal rotor adopts hidden pole type structure, in hidden pole type internal rotor excitation winding, passes into DC excitation electric current.
Embodiment tetra-:
With reference to accompanying drawing 4, a kind of another kind of embodiment of hidden pole type electromagnetic adjustable speed motor.Two stealthy core magnetic poles (a pair of utmost point) of internal rotor in embodiment tri-are increased to four (two pairs of utmost points), by making the current opposite in direction in the excitation winding 2-1 at each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles contrary, form NSNS structure.The rest may be inferred, the quantity of stealthy core magnetic pole can be increased to six (three pairs of utmost points), eight (four pairs of utmost points), ten (five pairs of utmost points), etc.
Claims (4)
1. a hidden pole type electromagnetic adjustable speed motor, is made up of internal rotor, hidden pole type external rotor and inner rotor shaft, between described internal rotor and hidden pole type external rotor, forms fixed-size even air gap.
Described internal rotor comprises internal rotor winding and internal rotor iron core, identical with the rotor of conventional AC asynchronous motor, can be mouse-cage type, winding-type or solid rotor; Described internal rotor is enclosed within on inner rotor shaft, and makes an entirety with inner rotor shaft.
Described hidden pole type external rotor comprises distributed external rotor excitation winding, hidden pole type outer rotor iron core and external rotor shell.Described distributed external rotor excitation winding adopts copper or aluminum conductor, and described hidden pole type outer rotor iron core adopts silicon steel sheet or steel alloy, and is fixed on external rotor shell, and external rotor shell is fixed on outer rotor shaft; Inner circle along hidden pole type outer rotor iron core has iron core slot, and described distributed external rotor excitation winding is embedded into described iron core slot the inside; Distributed external rotor excitation winding forms loop by the DC power supply that is contained in collector ring on external rotor shell and brush and outside, provide size adjustable DC excitation electric current to distributed external rotor excitation winding, in the inner circle of hidden pole type outer rotor iron core, do not have slotted part to form stealthy magnetic pole (abbreviation non-salient pole) the N utmost point and the S utmost point.
2. a kind of hidden pole type electromagnetic adjustable speed motor according to claim 1, it is characterized in that two stealthy core magnetic poles (a pair of utmost point) of hidden pole type external rotor to increase to four (two pairs of utmost points), by making the current opposite in direction in the excitation winding at each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles contrary, form NSNS structure.The rest may be inferred, the quantity of stealthy core magnetic pole can be increased to six (three pairs of utmost points), eight (four pairs of utmost points), ten (five pairs of utmost points), etc.
3. a kind of hidden pole type electromagnetic adjustable speed motor according to claim 1, it is characterized in that the structure of inner and outer Rotator to exchange, be the rotor structure that external rotor adopts conventional AC asynchronous motor, internal rotor adopts hidden pole type structure, in hidden pole type internal rotor winding, passes into DC excitation electric current.
4. according to a kind of hidden pole type electromagnetic adjustable speed motor described in claim 1 and 3, it is characterized in that two stealthy core magnetic poles (a pair of utmost point) of internal rotor to increase to four (two pairs of utmost points), by making the current opposite in direction in the excitation winding at each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles contrary, form NSNS structure.The rest may be inferred, the quantity of stealthy core magnetic pole can be increased to six (three pairs of utmost points), eight (four pairs of utmost points), ten (five pairs of utmost points), etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210543931.7A CN103855887A (en) | 2012-12-03 | 2012-12-03 | Non-salient pole electromagnetic speed regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210543931.7A CN103855887A (en) | 2012-12-03 | 2012-12-03 | Non-salient pole electromagnetic speed regulator |
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| CN103855887A true CN103855887A (en) | 2014-06-11 |
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| CN201210543931.7A Pending CN103855887A (en) | 2012-12-03 | 2012-12-03 | Non-salient pole electromagnetic speed regulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114667662A (en) * | 2019-11-15 | 2022-06-24 | 日本制铁株式会社 | Rotor core, rotor, and rotating electrical machine |
| TWI806195B (en) * | 2021-10-15 | 2023-06-21 | 士林電機廠股份有限公司 | Motor rotor magnet fixing structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1303117A (en) * | 1969-07-21 | 1973-01-17 | ||
| CN1044741A (en) * | 1989-02-02 | 1990-08-15 | 崔永年 | Energy-saving constant-torque stepless speed-regulating step-by-step intelligent motor |
| US20020070622A1 (en) * | 2000-12-07 | 2002-06-13 | Siemens Westinghouse Power Corporation | Method and apparatus to tune rotor's torsional natural frequency by geometry of rotor winding slot |
| CN101465592A (en) * | 2009-01-08 | 2009-06-24 | 清华大学 | Variable-frequency control electromagnetic torsion coupler and use thereof |
| CN101860314A (en) * | 2010-05-19 | 2010-10-13 | 鞍山钦元节能设备制造有限公司 | Barrel-type electromagnetic speed regulation system |
| CN202172355U (en) * | 2011-07-23 | 2012-03-21 | 鞍山钦元节能设备制造有限公司 | Combined type electromagnetic speed regulation system |
| CN102647059A (en) * | 2012-04-10 | 2012-08-22 | 江苏大学 | Remote intelligent speed control axial asynchronous magnetic coupling and speed regulating method |
| CN203166717U (en) * | 2012-12-03 | 2013-08-28 | 杨玉岗 | Non-salient-pole-type electromagnetic speed regulation machine |
-
2012
- 2012-12-03 CN CN201210543931.7A patent/CN103855887A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1303117A (en) * | 1969-07-21 | 1973-01-17 | ||
| CN1044741A (en) * | 1989-02-02 | 1990-08-15 | 崔永年 | Energy-saving constant-torque stepless speed-regulating step-by-step intelligent motor |
| US20020070622A1 (en) * | 2000-12-07 | 2002-06-13 | Siemens Westinghouse Power Corporation | Method and apparatus to tune rotor's torsional natural frequency by geometry of rotor winding slot |
| CN101465592A (en) * | 2009-01-08 | 2009-06-24 | 清华大学 | Variable-frequency control electromagnetic torsion coupler and use thereof |
| CN101860314A (en) * | 2010-05-19 | 2010-10-13 | 鞍山钦元节能设备制造有限公司 | Barrel-type electromagnetic speed regulation system |
| CN202172355U (en) * | 2011-07-23 | 2012-03-21 | 鞍山钦元节能设备制造有限公司 | Combined type electromagnetic speed regulation system |
| CN102647059A (en) * | 2012-04-10 | 2012-08-22 | 江苏大学 | Remote intelligent speed control axial asynchronous magnetic coupling and speed regulating method |
| CN203166717U (en) * | 2012-12-03 | 2013-08-28 | 杨玉岗 | Non-salient-pole-type electromagnetic speed regulation machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114667662A (en) * | 2019-11-15 | 2022-06-24 | 日本制铁株式会社 | Rotor core, rotor, and rotating electrical machine |
| TWI806195B (en) * | 2021-10-15 | 2023-06-21 | 士林電機廠股份有限公司 | Motor rotor magnet fixing structure |
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Application publication date: 20140611 |