CN203166717U

CN203166717U - Non-salient-pole-type electromagnetic speed regulation machine

Info

Publication number: CN203166717U
Application number: CN 201220690550
Authority: CN
Inventors: 杨玉岗
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-03
Filing date: 2012-12-03
Publication date: 2013-08-28
Anticipated expiration: 2022-12-03

Abstract

A non-salient-pole-type electromagnetic speed regulation machine is formed by an inner rotor, a non-salient-pole outer rotor and an inner rotor shaft. A uniform air gap is 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 with the rotor of a traditional alternating-current asynchronous motor. The non-salient-pole outer rotor comprises a distributed outer rotor excitation winding, a non-salient-pole outer rotor iron core and an outer rotor shell. An iron core groove is arranged along an inner circle of the non-salient-pole outer rotor iron core. The distributed outer rotor excitation winding is embedded into the iron core groove. The distributed outer rotor excitation winding forms a loop with an external direct-current power supply through a collecting ring installed on an outer rotor shell and an electric brush so that a direct-current excitation current is provided for the distributed outer rotor excitation winding. The inner circle of the non-salient-pole outer rotor iron core is not provided with a slotting portion so as to form an invisible magnetic pole N pole and an S pole. The machine of the utility model has the advantages that a frequency converter is replaced; a high-efficiency energy-saving, firm and reliable motor speed regulation method; by using the method, cost is low, no-load starting can be realized and there is no electromagnetic interference.

Description

A kind of hidden pole type electromagnetic adjustable speed motor

Technical field

The utility model relates to a kind of electromagnetic adjustable speed motor, relates 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 long-term high, and the serious waste of electric energy is its one of the main reasons.Be example with large fan, water pump, its drive motor voltage is for exchanging the high voltage of 3～10kV, power reaches more than the 3000kW, past is because the long-term constant-speed drive that adopts, wasted a large amount of electric energy, people extensively adopt the variable-frequency power power supply in recent years, make the motor low cruise when 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 the power conversion through variable frequency power supply, and the core component that carries out the power conversion is high performance electronic power switch device, these high performance electronic power switch devices are dependence on import all, so its price is high for a long time; The 2nd, these electronic power switch devices can produce bigger electric energy loss, and are subjected 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 specification requirement height of variable frequency power supply, complex structure is 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 have been 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 that causes is more serious; The 5th, along with capacity and the voltage of variable frequency power supply improves constantly, the withstand voltage and capacity of power electronic device can not meet the demands.

Occur a kind of permanent magnetic speed-adjusting driver in recent years and can partly overcome these technological deficiencies.This class permanent magnetic speed-adjusting driver adopts permanent magnet to produce magnetic field, and magnetic field is passed air gap master and slave moving axis is coupled, thereby regulates the size realization speed governing of coupled magnetic field by regulating air gap.But it also has shortcoming: the one, and the permanent magnet volume is less, and the torque of generation is less, and speed adjustable range is limited; The 2nd, permanent magnet is heated and the long-time running meeting produces demagnetization even magnet loss phenomenon; The 3rd, the mechanical device structure complexity of regulating air gap.

Summary of the invention

The purpose of this utility model is to overcome the 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 subjected to that voltage and power grade limit, all parts all are homemade hidden pole type electromagnetic adjustable speed motors.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of hidden pole type electromagnetic adjustable speed motor is made of internal rotor, hidden pole type external rotor and inner rotor shaft, forms fixed-size even air gap between described internal rotor and hidden pole type external rotor; Described internal rotor comprises internal rotor winding and internal rotor iron core, and is 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 the inner rotor shaft, and makes an integral body 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 the external rotor shell, and the external rotor shell is fixed on the outer rotor shaft; Interior circle along the 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 constitutes the loop by the DC power supply that is contained in collector ring on the external rotor shell and brush and outside, the DC excitation electric current of adjustable size being provided for distributed external rotor excitation winding, the part that not have to slot at the interior circle of hidden pole type outer rotor iron core forms the stealthy magnetic pole N utmost point and the S utmost point.

The beneficial effects of the utility model are:

1. the utility model can be widely used in various the needs in the rotating machinery load that speed governing drives, 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 subjected to voltage and power grade, all parts all be advantage such as homemade.Under the constant situation of prime mover rotating speed, come the regulating load rotating speed by the size of regulating the exciting current If of hidden pole type electromagnetic adjustable speed motor in the utility model, can replace the widely used frequency-changing speed regulation driver of current people.

2. be zero by regulating exciting current, allow the motor starting under no load, when electrical motors after rated speed, progressively increase exciting current, make that load is stable to accelerate to required rotating speed.Can significantly reduce rush of current, motor winding heating and mechanical shock in the motor starting procedure.

3. by the detection to exciting current and rotating speed, realize the accurate control of rotating speed, be applicable to the mechanical load that needs 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 all be to transmit by the magnetic field between the inside and outside rotor of electromagnetic adjustable speed motor to all prime mover, rather than come transmitting torque by traditional mechanical connection, not only the vibration of equipment and noise reduce greatly, and overcome the problem that all energy in the RHVC all will transmit by fragile, expensive electronic power switch, thereby improved the reliability of equipment greatly.And have only 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. it is also very convenient to make electromagnetic adjustable speed motor of the present utility model, and its manufacturing process can adopt the existing technical standard of making 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 has overcome existing permanent magnetic speed-adjusting driver is little, speed adjustable range is narrow, permanent magnet is heated and the long-time running meeting produces the defectives such as mechanical device structure complexity of demagnetization even loss of excitation, adjusting air gap.

Description of drawings

Fig. 1 is example structure schematic diagram of the present utility model;

Fig. 2 is the structural representation of the hidden pole type electromagnetic adjustable speed motor of four magnetic poles (two pairs of magnetic poles) among Fig. 1;

Fig. 3 is the structural representation of the hidden pole type electromagnetic adjustable speed motor that inside and outside rotor structure exchanges among Fig. 1;

Fig. 4 is the structural representation of the hidden pole type electromagnetic adjustable speed motor of four magnetic poles (two pairs of magnetic poles) among Fig. 3.

Among the figure, the 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; The 3-air gap; The 4-inner rotor shaft; * ,-distributed external rotor excitation winding in the direction of exciting current, " * " expression electric current flows into paper, " " expression electric current flows out paper.

Embodiment

Embodiment one:

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, and is 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 the inner rotor shaft 4, and and inner rotor shaft 4 make an integral body.

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 the external rotor shell, external rotor shell 2-3 is fixed on the outer rotor shaft (outer rotor shaft does not draw in the present embodiment); Interior 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 constitutes the loop by the DC power supply that is contained in collector ring on the external rotor shell 2-3 and brush and outside, the DC excitation electric current of adjustable size being provided for distributed external rotor excitation winding 2-1, the part that not have to slot at the interior circle of hidden pole type outer rotor iron core 2-2 forms stealthy core magnetic pole (abbreviation non-salient pole) the N utmost point and the S utmost point.

Embodiment two:

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 among the embodiment one are increased to four (two pairs of utmost points), by the current opposite in direction among the excitation winding 2-1 that makes each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles opposite, form the 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 three:

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 inside and outside rotor among the embodiment one is exchanged, and namely external rotor adopts the rotor structure of conventional AC asynchronous motor, and internal rotor adopts the hidden pole type structure, feeds the DC excitation electric current in hidden pole type internal rotor excitation winding.

Embodiment four:

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 among the embodiment three are increased to four (two pairs of utmost points), by the current opposite in direction among the excitation winding 2-1 that makes each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles opposite, form the 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

1. a hidden pole type electromagnetic adjustable speed motor is made of internal rotor, hidden pole type external rotor and inner rotor shaft, forms fixed-size even air gap between described internal rotor and hidden pole type external rotor; Described internal rotor comprises internal rotor winding and internal rotor iron core, and is 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 the inner rotor shaft, and makes an integral body 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 the external rotor shell, and the external rotor shell is fixed on the outer rotor shaft; Interior circle along the 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 constitutes the loop by the DC power supply that is contained in collector ring on the external rotor shell and brush and outside, the DC excitation electric current of adjustable size being provided for distributed external rotor excitation winding, the part that not have to slot at the interior circle of hidden pole type outer rotor iron core forms the stealthy magnetic pole 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 of hidden pole type external rotor are increased to four, by the current opposite in direction in the excitation winding that makes each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles opposite, form the NSNS structure.

3. a kind of hidden pole type electromagnetic adjustable speed motor according to claim 1, it is characterized in that the structure of inside and outside rotor is exchanged, be the rotor structure that external rotor adopts the conventional AC asynchronous motor, internal rotor adopts the hidden pole type structure, feeds the DC excitation electric current in hidden pole type internal rotor winding.

4. a kind of hidden pole type electromagnetic adjustable speed motor according to claim 3, it is characterized in that two stealthy core magnetic poles of internal rotor are increased to four, by the current opposite in direction in the excitation winding that makes each stealthy core magnetic pole two ends, make the polarity of adjacent two stealthy core magnetic poles opposite, form the NSNS structure.