CN101356113A

CN101356113A - Motor with brake, and elevator drive system using the motor

Info

Publication number: CN101356113A
Application number: CNA2007800012238A
Authority: CN
Inventors: 伊东弘晃; 川崎干
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2006-01-19
Filing date: 2007-01-19
Publication date: 2009-01-28
Also published as: WO2007083754A1; JP2007195342A

Abstract

A motor with a brake comprises two electromagnetic brake mechanisms (8a, 8b) installed around a rotating shaft (4). The electromagnetic brake mechanisms (8a, 8b) comprise disk bodies (14a, 14b) rotating integrally with the rotating shaft (4), movable members (13a, 13b) approaching and separating from the disk bodies (14a, 14b), and electromagnets (12a, 12b) having coils (11a, 11b) and moving the movable members (13a, 13b) by generating electromagnetic forces through the energization of the coils (11a, 11b). Currents in the directions reverse to each other for the electromagnets (12a, 12b) flow through the coils (11a, 11b) of the electromagnets (12a, 12b) to drive the electromagnets (12a, 12b). Consequently, the reliability of the motor can be increased by accurately reducing, by a simple means, a magnetic flux leaking into and outside the motor when the currents flow through the coils (11a, 11b) of the electromagnetic brake mechanisms (8a, 8b) without requiring a costly mechanical modification.

Description

The motor of band brake and the elevator drive system that uses this motor

Technical field

The elevator drive system that the present invention relates to a kind of motor of band brake and use this motor, this drg have the magnet stopper mechanism to the S. A. brake activation.

Background technology

In the motor of this band brake, be provided with magnet stopper mechanism in an end of its S. A..This magnet stopper mechanism has around the electromagnet of the S. A. of motor configuration and by the movable member of this magnet control.When driving magnet stopper mechanism, magnet spool is by excitation.Excitation by this coil produces magnetic flux, but this flux leakage, and exists the parts that the magnetic materials such as bearing by coder that links with S. A. and supporting rotating shaft are constituted to produce dysgenic situation.This is described in more detail.

Fig. 9 represents the structure of the motor 1 of band brake in the past.This motor 1 has barrel-contoured housing 2, and S. A. 4 rotatably is supported on the inside center axis of this housing 2 via bearing 3.S. A. 4 is formed by magnetic materials such as iron.On the interior perimembranous of housing 2, stator 7 is installed, on the salient pole of this stator 7, is wound with drive coil 6 respectively.Be fixed with rotor 5 cylindraceous in that the peripheral part of S. A. 4 is chimeric, the inner peripheral surface of the outer peripheral face of this rotor 5 and stator 7 is separated with very little with gap mutually opposed, and rotor 5 is corresponding to the energising to above-mentioned drive coil 6, and rotates with S. A. 4 one.

In an end of housing 2, be provided with magnet stopper mechanism 8 in the mode of surrounding S. A. 4, and dispose electromagnetic type coder 9 in the end face side of this magnet stopper mechanism 8.

Magnet stopper mechanism 8 has: electromagnet 12; The movable member 13 that is oppositely arranged with this electromagnet 12; And be installed on the above-mentioned S. A. 4, as the plectane body 14 of brake component.

Electromagnet 12 is by following component set-up: the yoke 10 of the ring-type that is formed by magnetic material; With in an end face side of this yoke 10 as the coil of circumferentially installing 11 around above-mentioned S. A. 4.Movable member 13 forms ring-type by magnetic material, and be configured to relative with an end face of yoke 10, and via a plurality of axis of guides 18 be supported into can S. A. 4 axially on move.

The plectane body 14 that is installed on the S. A. 4 is, except that its base portion, is inserted in the gap between the end face of above-mentioned movable member 13 and housing 2.Movable member 13 is by being arranged on spring 15 on the axis of guide 18 to the opposition side of yoke 10 application of force flexibly.And, be energized at coil 11, when electromagnet 12 produces electromagnetic forcees, by this electromagnetic force, movable member 13 antagonistic springs 15 ground are attracted.When the energising of cutting off coil 11 from this state, electromagnetic force disappearance, movable member 13 moves to the opposition side of yoke 10 by the power that applies of spring 15, and via brake shoe 19 and above-mentioned plectane body 14 crimping, and the friction force by this crimping is to S. A. 4 brake activationes.And, be energized once more at coil 11, when electromagnet 12 produces electromagnetic forcees, by this electromagnetic force, movable member 13 antagonistic springs 15 ground are attracted, and the braking of S. A. 4 is disengaged.

Coder 9 links via bearing 16 and S. A. 4, and the angle of rotation when detecting these S. A. 4 rotations.These coder 9 quilt covers 17 cover.

Like this, in the motor 1 of band brake, during left-hand tools axle 4 brake activationes, in the coil 11 of electromagnet 12, flow through electric current and magnetize yoke 10, and attract movable member 13.When flowing through electric current in coil 11, the S. A. 4 that is made of magnetic material is magnetized simultaneously with yoke 10, and S. A. 4 becomes electromagnet and forms magnetic flux in inside.When S. A. 4 was magnetized, magnetic flux was by near other parts that are made of magnetic material bearing 16 between the bearing 3 that contacts with S. A. 4, the coder 9 that is arranged on S. A. 4 ends, coder 9 and the S. A. 4 and the S. A. 4.Dot among Fig. 9 by the magnetic flux P of magnet stopper mechanism 8 and the magnetic flux Q that passes through S. A. 4.

Yet, when when the part of magnetic encoder 9 is passed through leakage magnetic flux, this accuracy of detection there is harmful effect, and when in the bearing 16 of the bearing 3 of S. A. 4 or coder 9 during by magnetic flux Q, outer shroud, interior ring, ball and the retainer etc. of this bearing 3,16 that is made of magnetic material magnetically attract each other respectively, may become rotational resistance.When these problems of generation, not only, bearing 3,16 or S. A. 4 are damaged because the bad grade of detection of angle of rotation may produce obstacle to motor 1 running.And according to circumstances difference may produce harmful effect to rotor 5, and makes it produce the pulsation of moment of torsion.

Yet, as the motor of this band brake, from increasing the viewpoint of drg moment of torsion and safety, as shown in figure 10, also exist make two magnet stopper mechanisms S. A. 4 axially on the multiple stage drg structure that is set up in parallel.In some countries, requirement is used for the motor of the band brake of elevator hoist, adopts this multiple stage drg structure.

Under the situation that adopts this multiple stage drg structure, when flowing through electric current in coil 11a, the 11b of each 8a of magnet stopper mechanism, 8b, the magnetization of S. A. 4 further strengthens.The magnetic flux Q's of this moment flows shown in the dotted line of Figure 10.Therefore, in this case, the harmful effect that is attached to coder 9 on the S. A. 4 or bearing 3 of supporting rotating shaft 4 etc. is become bigger.

As solving the method that above-mentioned S. A. magnetizes the problem that causes, Japanese kokai publication hei 5-111213 number, Japanese real opening in flat 3-70060 number and Japanese kokai publication sho 59-70165 number, proposition is non-magnetic material by making near the S. A. part coder etc., relaxes the countermeasure of the magnetized influence of S. A. thus.In addition, real opening proposes following countermeasure in flat 6-74066 number in Japan, be about to the coil separated into two parts of magnet stopper, and make the flow direction of the electric current that flows in the side and outer coil within it opposite, reduce the magnetization of S. A. of the inboard of magnet stopper thus, and reduce influence coder or bearing.

But near the S. A. part employing makes coder etc. are during for the method for non-magnetic material, and it is complicated that the structure of this S. A. etc. becomes, and components number also increases, and cost uprises.And, even making a S. A. part is under the situation of non-magnetic material, for a plurality of magnet stopper mechanism is configured in side by side S. A. axially on the situation of multiple stage drg structure under, when S. A. is magnetized, compare with the situation of a stopper mechanism, in S. A., form bigger magnetic flux Q, therefore, even near the parts the coder are non-magnetic material, also become greatly to the leakage magnetic flux of the periphery of coder, can not be magnetized the reduction effect fully.

On the other hand, in the method divided into two parts with coil, it is complicated that the yoke of magnet stopper and the structure of coil become, and components number increases.And, under the situation of multiple stage drg structure, construct further complicated.

Summary of the invention

The present invention is conceived to the problems referred to above and carries out, its purpose is, in the motor of the band brake that the multiple stage drg is constructed, do not need to spend the mechanicalness change of cost, with simple method, the inner or peripheral leakage magnetic flux when positively being reduced in the coil midstream excess current of magnet stopper mechanism to motor, and the reliability of raising motor, and its purpose is, by this motor being used as the winch of elevator, can driving elevator swimmingly and improves ride quality.

The motor of band brake of the present invention is, has: S. A.; With two magnet stopper mechanisms that are arranged on this S. A. peripheral part; Above-mentioned each magnet stopper mechanism has: be separately positioned on the above-mentioned S. A., with the brake component of this S. A. one rotation; The movable member that moves on the direction of this brake component can be toward or away from; And electromagnet, have around the circumferential coil of above-mentioned S. A., by producing electromagnetic force, and above-mentioned movable member is moved to this coil electricity; In above-mentioned each magnet spool, be flowing in mutual oppositely directed electric current in its each electromagnet.

And the motor of band brake of the present invention is, has: S. A.; With two magnet stopper mechanisms that are arranged on this S. A. peripheral part; With the power circuit that drives these magnet stopper mechanisms; Above-mentioned each magnet stopper mechanism has: be separately positioned on the above-mentioned S. A., with the brake component of this S. A. one rotation; The movable member that moves on the direction of this brake component can be toward or away from; And electromagnet, have around the circumferential coil of above-mentioned S. A., by producing electromagnetic force, and above-mentioned movable member is moved to this coil electricity; Above-mentioned power circuit has control unit, and this control unit makes in above-mentioned each magnet spool, is flowing in mutual oppositely directed electric current in its each electromagnet.

And the motor of band brake of the present invention has: S. A.; With a plurality of magnet stopper mechanism that is arranged on this S. A. peripheral part; Above-mentioned each magnet stopper mechanism has: be separately positioned on the above-mentioned S. A., with the brake component of this S. A. one rotation; The movable member that moves on the direction of this brake component can be toward or away from; And electromagnet, have around the circumferential coil of above-mentioned S. A., by producing electromagnetic force, and above-mentioned movable member is moved to this coil electricity; The following electric current that in above-mentioned a plurality of magnet spools, flows, promptly the coil more than at least 1 in these a plurality of coils, with remaining coil between, the direction phase that flows is reverse each other.

And the motor of band brake of the present invention is, has: S. A.; With a plurality of magnet stopper mechanism that is arranged on this S. A. peripheral part; And the power circuit that drives these magnet stopper mechanisms; Above-mentioned each magnet stopper mechanism has: be separately positioned on the above-mentioned S. A., with the brake component of this S. A. one rotation; The movable member that moves on the direction of this brake component can be toward or away from; And electromagnet, have around the circumferential coil of above-mentioned S. A., by producing electromagnetic force, and above-mentioned movable member is moved to this coil electricity; Above-mentioned power circuit has control unit, and this control unit makes in above-mentioned a plurality of magnet spool the following electric current that flows, promptly the coil more than at least 1 in these a plurality of coils, with remaining coil between, the direction phase that flows is reverse each other.

And the present invention is a kind of elevator drive system, the motor of above-mentioned band brake is used as the winch of the cab that drives elevator.

Description of drawings

Fig. 1 is the semi-sictional view section-drawing of structure of motor of the band brake of expression the present invention the 1st embodiment.

Fig. 2 is the partial cross-sectional perspective view of structure of the motor of this band brake of expression.

Fig. 3 is the power circuit diagram to the coil of magnet stopper mechanism of the motor of this band brake.

Fig. 4 is the power circuit diagram to the coil of magnet stopper of motor of the band brake of the present invention's the 2nd embodiment.

Fig. 5 is the semi-sictional view section-drawing of structure of motor of the band brake of expression the present invention the 3rd embodiment.

Fig. 6 is the semi-sictional view section-drawing of structure of motor of the band brake of expression the present invention the 4th embodiment.

Fig. 7 is the semi-sictional view section-drawing of structure of motor of the band brake of expression the present invention the 5th embodiment.

Fig. 8 is the instruction diagram of the example of the expression winch that the motor of band brake of the present invention is used as elevator.

Fig. 9 is the semi-sictional view section-drawing of structure of representing the motor of band brake in the past.

Figure 10 is the semi-sictional view section-drawing of structure of the motor of other band brake in the past of expression.

The specific embodiment

Below, referring to figs. 1 through Fig. 8 embodiments of the present invention are described.In addition, to using same-sign, and omit repeat specification with the corresponding part of formation in the past.

Fig. 1 and Fig. 2 represent the structure of motor 1 of the band brake of the 1st embodiment.In this motor 1, the 1st and the 2nd two 8a of magnet stopper mechanism, 8b axially are set up in parallel peripheral part in an end of S. A. 4 along S. A. 4.Each 8a of magnet stopper mechanism, 8b have:

electromagnet

12a, 12b are installed in

coil

11a, 11b on yoke 10a, the 10b respectively and form;

Movable member

13a, 13b, with relative configuration of end face of this

electromagnet

12a, 12b, can along the axis of guide 18 S. A. 4 axially on move; And

spring members

15a, 15b, with above-mentioned

movable member

13a, 13b the opposition side direction application of force to electromagnet 12a,

12b.Coil

11a, 11b are as circumferentially being installed on yoke 10a, the 10b around S. A. 4.

On S. A. 4, the mode to dispose accordingly with each

electromagnet

12a, 12b is equipped with the 1st and the 2nd two

plectane body

14a, 14b as brake component.These

plectane bodies

14a, 14b and the rotation of S. A. 4 one.Above-mentioned

movable member

13a, 13b be by the power that applies of

spring members

15a, 15b, via

brake shoe

19a, 19b and above-mentioned

plectane body

14a, 14b crimping, and by its friction force to S. A. 4 brake activationes, limit its rotation.

Carry out as follows at the glancing impact of removing S. A. 4, promptly in coil 11a, the 11b of

electromagnet

12a, 12b, flow through electric current, make

electromagnet

12a, 12b produce electromagnetic force, attract

movable member

13a, 13b by these electromagnetic force

antagonistic spring parts

15a, 15b ground, it is drawn back from plectane body 14a, 14b.And, by cutting off energising to

coil

11a, 11b, the electromagnetic force of

electromagnet

12a, 12b is disappeared, the power that applies by

spring members

15a, 15b makes

movable member

13a, 13b move to the opposition side of

electromagnet

12a, 12b, and make itself and

plectane body

14a, 14b crimping, to S. A. 4 brake activationes.

Usually, in the motor 1 of this band brake with two 8a of magnet stopper mechanism, 8b, in coil 11a, the 11b of each 8a of magnet stopper mechanism, 8b, on equidirectional, flow through equal electric current and excitation.

But, when in each

coil

11a, 11b, flowing through equidirectional electric current and excitation, connect the S. A. 4 of

coil

11a, 11b inboard, be magnetized and become electromagnet at each

coil

11a, 11b inside part, and become the form of this electromagnet series combination, therefore, S. A. 4 all forms very strong electromagnet.

Therefore, in the motor 1 of the band brake of present embodiment, constitute, the 1st and the 2 two

coil

11a, 11b different counter-current and excitations mutually that flow.For example,, in Fig. 1, go up streaming current,, go up streaming current in direction (z direction) oppositely directed with it, under paper for the 2nd coil 11b in the direction on paper (+z direction) for the 1st coil 11a.That is, as shown in Figure 2, in the 1st coil 11a, be seen as streaming current on the clws direction in end face side from S. A. 4, in the 2nd coil 11b on the C.C.W. direction streaming current.

Like this, when to both sides' coil 11a, 11b flowing phase each other during the electric current of oppositely directed direction, in the S. A. 4 that connects each

coil

11a, 11b inboard, with the cooresponding part of the 1st coil 11a and with two places of the cooresponding part of the 2nd coil 11b, be magnetized with mutual oppositely directed magnetic pole.And, become one on it is axial owing to be reversed magnetized S. A. 4, therefore magnetization is cancelled each other, and S. A. 4 all magnetization reduce significantly.Flow direction when flowing through electric current in

coil

11a, 11b is represented by dotted line L, the M of Fig. 1.

In order in

coil

11a, 11b, to flow through mutual oppositely directed electric current, can use power circuit for example shown in Figure 3.This power circuit is that the 1st and the

2nd coil

11a, 11b are connected in parallel via switch 41 and power supply 40.And the 1st thyristor 42a is connected in series with respect to the 1st coil 11a, and the 2nd thyristor 42b is connected in series with respect to the 2nd coil 11b.The anode of the 1st thyristor 42a is connected with a side terminal of power supply 40, and negative electrode is connected with the 1st coil 11a.And the anode of the 2nd thyristor 42b is connected with the opposite side terminal of power supply 40, and negative electrode is connected with the 2nd coil 11a.

According to this power circuit, when close switch 41, be limited in a direction to the sense of current that the 1st coil 11a flows by the 1st thyristor 42a from power supply 40, the sense of current that flows to the 2nd coil 11b is limited in another direction by the 2nd thyristor 42b, can make the direction of current that flows to the 1st coil 11a and the direction of current that flows to the 2nd coil 11b for mutually oppositely.

So, in the motor 1 of the band brake of present embodiment, can reduce magnetization significantly to S. A. 4, therefore, can reduce near the influence of the elements of magnetic material the S. A.s such as bearing 16 4 of the influence to coder 9, bearing 3, link encoder 9 and S. A. 4 that this leakage magnetic flux causes significantly to supporting rotating shaft 4.And, also diminish by the influence of 4 pairs of rotor 5 sides of S. A. from the 8a of magnet stopper mechanism, 8b, can solve the problems such as torque ripple of the S. A. 4 that the magnetic flux that spills from the 8a of magnet stopper mechanism, 8b causes, can not have the obstacle ground motor that turns round swimmingly.

And, the motor 1 of the band brake of present embodiment, it is identical with the motor of common multiple stage drg structure that machinery constitutes, only just can correspondence to the power circuit of coil 11a, the 11b of

electromagnet

12a, 12b energising by change, therefore, do not have the components number increase or constitute complicated problem, can easily be applicable to existing motor.

In addition, in the present embodiment, end face side from S. A. 4, in the coil 11a of the 1st electromagnet 12a, flow through electric current in the clockwise direction, in the coil 11b of the 2nd electromagnet 12b, flow through electric current in the counterclockwise direction, but as long as the sense of current that flows in these two

coil

11a, 11b is that mutually oppositely then its direction can be an any direction.

Secondly, with reference to Fig. 4 the 2nd embodiment is described.The motor of the band brake of the 2nd embodiment has the motor identical construction with Fig. 1 and the 1st embodiment shown in Figure 2.And, same with the situation of the 1st embodiment, in coil 11a, the 11b of

electromagnet

12a, 12b, flow through the mutual oppositely directed electric current of direction, but be controlled to be varying in size of electric current mobile in this

coil

11a, 11b this moment.That is, it is poor that the absolute value of the electric current that flows is had, and reduces so that produce the magnetic flux density of the position of magnetized problem.

For example, produce the magnetic vector of coil 11a at coder 9 peripheries, and under the big situation of the change of the leakage magnetic flux around the coder 9, current amount flowing is reduced or make that current amount flowing increases in the 2nd coil 11b, perhaps increase and decrease current amount flowing in each

coil

11a, 11b and that the magnitude of current is had is poor.Thus, the magnetic flux density that spills at coder 9 peripheries is diminished.

Fig. 4 represents an example of the power circuit of this moment.The power circuit of this power circuit and the 1st embodiment is same, and the 1st and the

2nd coil

11a, 11b are connected in parallel via switch 41 and power supply 40.And the 1st thyristor 42a is connected in series with respect to the 1st coil 11a, and the 2nd thyristor 42b is connected in series with respect to the 2nd coil 11b.Thyristor 42a, the 42b of this moment are 3 terminal thyristor, and the grid of the 1st thyristor 42a is connected with the 1st thyristor control circuit 43a, and the grid of the 2nd thyristor 42b is connected with the 2nd thyristor control circuit 43b.

According to this power circuit, adjust by controlling each

thyristor

42a, 43b, so that the current amount flowing generation is poor in each

coil

11a, 11b by each

thyristor control circuit

43a, 43b.

In this 2nd embodiment, poor by current amount flowing is had, compare with the situation of the 1st embodiment thus, leakage magnetic flux can be further reduced, and the influence of magnetic can be further reduced each several part.

Fig. 5 represents the structure of motor 1 of the band brake of the 3rd embodiment.In this embodiment, the peripheral part in 4 one ends of S. A. axially is provided with the 1st and the 2 two 20a of magnet stopper mechanism, 20b side by side along S. A. 4.

The 20a of these magnet stopper mechanisms, 20b have:

electromagnet

24a, 24b with

coil

25a, 25b; Circular-arc

movable member

23a, 23b with the outer peripheral face side that is configured in these

electromagnet

24a, 24b;

Movable member

23a, 23b can make progress in footpath that be toward or away from respect to

electromagnet

24a, 24b, S. A. 4 and move, and by

spring members

22a, 22b by to the direction elastic force-applying that leaves from electromagnet 24a, 24b.In addition, circular-arc

movable member

23a, 23b is provided with a plurality of at the outer circumferential side of

electromagnet

24a, 24b in the mode that disposes symmetrically with respect to S. A. 4 across this

electromagnet

24a, 24b.

On S. A. 4, with the cooresponding mode of each

electromagnet

24a, 24b, be separately installed with

cylinder

21a, 21b with one heart with S. A. 4 as brake component.Above-mentioned

electromagnet

24a, 24b and

movable member

23a, 23b are configured in the inboard of above-mentioned

cylinder

21a, 21b, and above-mentioned

movable member

23a, 23b are supported to relative with the inner peripheral surface of above-mentioned

cylinder

21a, 21b.

Cylinder

21a, 21b and the rotation of S. A. 4 one.

Movable member

23a, 23b via the inner peripheral surface crimping of

brake shoe

19a, 19b and

cylinder

21a, 21b, and pass through its friction force to S. A. 4 brake activationes by the power that applies of

spring members

22a, 22b.

At the glancing impact of removing S. A. 4, in coil 25a, the 25b of

electromagnet

24a, 24b, flow through electric current, make

electromagnet

24a, 24b produce electromagnetic force, attract

movable member

23a, 23b, it is drawn back from

cylinder

21a, 21b by these electromagnetic force

antagonistic spring parts

22a, 22b ground.Can remove the braking of S. A. 4 thus.And, by cutting off energising to

coil

25a, 25b, the electromagnetic force of

electromagnet

24a, 24b is disappeared, the power that applies by

spring members

22a, 22b makes

movable member

23a, 23b move to the direction of leaving from

electromagnet

24a, 24b, and make itself and

cylinder

21a, 21b crimping, thus can be to S. A. 4 brake activationes.

In the motor 1 of this band brake, the 20a of magnet stopper mechanism, 20b S. A. 4 axially on configuration side by side, therefore, when flowing through equidirectional electric current in each

coil

25a, 25b, S. A. 4 is magnetized strongly.Therefore, in the present embodiment, to each coil 25a, the mutual oppositely directed electric current of 25b flowing phase.Identical effect in the time of accessing with the 1st embodiment thus can reduce the influence that leakage magnetic flux causes.

And, same during with the 2nd embodiment, by in

coil

25a, 25b, flowing through mutual oppositely directed electric current, and be controlled to be varying in size of this electric current, can further reduce the leakage magnetic flux size thus.

In the respective embodiments described above, the quantity that magnet stopper mechanism has been described is two situation, but the quantity of magnet stopper mechanism also can be a plurality of more than 3.

Fig. 6 represents to have the motor 1 of band brake of the 4th embodiment of 3 8a of magnet stopper mechanism, 8b, 8c, and Fig. 7 represents to have the motor 1 of band brake of the 5th embodiment of 4 8a of magnet stopper mechanism, 8b, 8c, 8d.In addition, the 8a of magnet stopper mechanism, 8b, 8c, 8d are plate disc brake structure identical during with the 1st embodiment arbitrarily, and be configured to along S. A. 4 axially side by side.

In these motor 1, the sense of current that will flow in

coil

11a, 11b, 11c, 11d is controlled to, and is mutually oppositely in each other at its adjacent coil.That is, under the situation of the motor 1 of Fig. 6, the sense of current that flows among the intermediate coil 11b in 3

coil

11a, 11b, 11c is opposite with the sense of current that flows in two

coil

11a, 11c of its both sides.And, under the situation of the motor 1 of Fig. 7, the sense of current that flows the end from S. A. 4 begins the 1st of number and the

3rd coil

11a, 11c is opposite with sense of current mobile in the 2nd and the

4th coil

11b, 11d.

Like this, when the flow direction of electric current is opposite in each

coil

11a, 11b, 11c, 11d, compare with the situation that all is equidirectional, can reduce S. A. 4 single-pieces magnetization significantly, and can reduce the influence of leakage magnetic flux that the magnetization of S. A. 4 causes the each several part of motor 1.

And, when the quantity of coil is even number, electric current is identical with the coil quantity that electric current flows round about to the coil quantity that a direction flows, when the quantity of coil is odd number, the coil quantity that electric current flows to a direction and the electric current difference of mobile coil quantity round about are 1, so the magnetic field size of S. A. 4 in-to-in all directions is roughly the same.Therefore, can effectively reduce the magnetization of S. A. 4 single-pieces.And, by making the direction of current that in

coil

11a, 11b, 11c, 11d, flows, at adjacent coil alternately is oppositely in each other, can offset the magnetized state of S. A. 4 thus more fifty-fifty, and can positively relax leakage magnetic flux to motor 1 inner or peripheral influence.

And, also can change the size of the electric current that in each

coil

11a, 11b, 11c, 11d, flows respectively as the 2nd embodiment, also can further reduce leakage magnetic flux in this case.

In addition, when the coil number amount is a plurality of more than 3, between the coil more than at least 1 in these a plurality of coils and the remaining coil, make opposite the getting final product of the flow direction of electric current, not necessarily need alternately to change the flow direction of electric current.

In the motor 1 of the band brake of Fig. 6 and the 4th and the 5th embodiment shown in Figure 7, be the plate disc brake structure of use plectane body 14a～14d, but also can be the drum brake mechanism structure that as the 3rd embodiment, uses brake component cylindraceous as brake component.

And in the present invention, if the quantity of the magnet stopper mechanism that S. A. 4 is provided with is plural a plurality of, then its quantity is unqualified, and quantity arbitrarily can be set.

And, when the quantity of magnet stopper mechanism is a plurality of more than 3, between the coil more than at least 1 in each coil of this a plurality of magnet stopper mechanism and the remaining coil, make opposite the getting final product of the flow direction of electric current, not necessarily need the coil of adjacent magnet stopper is alternately changed the flow direction of electric current.

The motor 1 of above-described band brake of the present invention for example can be used as the winch of elevator.Fig. 8 represents the motor 1 of band brake of the present invention is used as the example of the winch 31 of elevator.

That is, on the S. A. 4 of the motor 1 of band brake of the present invention, rope sheave 30 is installed and, and this winch 31 is arranged in for example Machine Room on elevating road 32 tops as winch 31.Then, rope 33 is wound on the rope sheave 30, via this rope 33 sling in elevating road 32 cab 34 and counterweight 35, the driving by motor 1 makes rope sheave 30 rotations, makes cab 34 lifting in elevating road 32.And, the action of the magnet stopper mechanism by motor 1, the stopping and beginning of the lifting action of control cab 34.

S. A. 4 to motor 1 is implemented the countermeasure that magnetization reduces, the influence of leakage magnetic flux to coder, bearing or rotor can be suppressed for less, thus when being used as the winch 31 of elevator, be difficult to produce fault, and can drive cab 34 swimmingly, the elevator with high reliability and better taking sense can be provided.

Industrial applicibility

In the motor of the band brake of multi-stag brake structure, can not need to spend the machine of cost Change on the tool with simple method, positively is reduced in the coil midstream mistake of electromagnetic brake mechanism The inner or peripheral leakage magnetic flux to motor during electric current, and the reliability of raising motor. And, by This motor is used as the hoist engine of elevator, can provides by the elevator that drives sleekly and taking sense is good.

Claims

1. the motor of a band brake is characterized in that, has: S. A.; With two magnet stopper mechanisms that are arranged on this S. A. peripheral part,

Above-mentioned each magnet stopper mechanism has: brake component is separately positioned on the above-mentioned S. A., with this S. A. one rotation; Movable member can move being toward or away from the direction of this brake component; And electromagnet, have around the circumferential coil of above-mentioned S. A., by producing electromagnetic force, and above-mentioned movable member is moved to this coil electricity,

Being flowing in each this electromagnet in above-mentioned each magnet spool is mutual oppositely directed electric current.

2. the motor of a band brake is characterized in that, has: S. A.; Be arranged on two magnet stopper mechanisms of this S. A. peripheral part; With the power circuit that drives these magnet stopper mechanisms,

Above-mentioned power circuit has control unit, and this control unit makes and is flowing in each this electromagnet in above-mentioned each magnet spool is mutual oppositely directed electric current.

3. the motor of band brake as claimed in claim 1 or 2 is characterized in that,

Above-mentioned two magnet stopper mechanisms above-mentioned S. A. axially on configuration side by side.

4. the motor of band brake as claimed in claim 1 or 2 is characterized in that,

In above-mentioned each magnet spool mutually oppositely during streaming current, it is poor that the absolute value of this both sides' electric current is had.

5. the motor of band brake as claimed in claim 1 or 2 is characterized in that,

Be arranged on the above-mentioned S. A. and with each brake component of this S. A. one rotation be the plectane body.

6. the motor of band brake as claimed in claim 1 or 2 is characterized in that,

Be arranged on the above-mentioned S. A. and with each brake component of this S. A. one rotation be cylinder.

7. the motor of a band brake is characterized in that, has: S. A.; With a plurality of magnet stopper mechanism that is arranged on this S. A. peripheral part,

The electric current that flows in above-mentioned a plurality of magnet spools is, the coil more than at least 1 in these a plurality of coils, with remaining coil between, it is reverse each other to flow to phase.

8. the motor of a band brake is characterized in that, has: S. A.; Be arranged on a plurality of magnet stopper mechanism of this S. A. peripheral part; With the power circuit that drives these magnet stopper mechanisms,

Above-mentioned power circuit has control unit, and this control unit makes in above-mentioned a plurality of magnet spool the electric current that flows be, the coil more than at least 1 in these a plurality of coils, with remaining coil between, it is reverse each other to flow to phase.

9. as the motor of claim 7 or 8 described band brakes, it is characterized in that,

Above-mentioned a plurality of magnet stopper mechanism above-mentioned S. A. axially on configuration side by side.

10. as the motor of claim 7 or 8 described band brakes, it is characterized in that,

In above-mentioned a plurality of magnet spool, at the coil of current direction equidirectional, identical with the quantity of the coil of current direction different directions or differ 1.

11. the motor of band brake as claimed in claim 9 is characterized in that,

The sense of current that flows in above-mentioned a plurality of magnet spools is different in each magnet spool of mutual disposed adjacent respectively.

12. the motor as claim 7 or 8 described band brakes is characterized in that,

During streaming current, it is poor that the absolute value between the electric current that different directions flows has in above-mentioned each magnet spool.

13. the motor as claim 7 or 8 described band brakes is characterized in that,

14. the motor as claim 7 or 8 described band brakes is characterized in that,

15. an elevator drive system is characterized in that, the motor of each described band brake in the claim 1～14 is used as the winch of driving elevator cage.