JP2000175498A - Motor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain electric power which is used exclusively for functioning the auxiliary functional means of a motor device, without using expensive regulating means. SOLUTION: A generator 14 (generating means) which generates electric power by utilizing the rotation of a motor 13, which is operated by means of a main power supply 11, is provided with respect to the motor 13, and the electric power generated from the generator 14 is supplied to an auxiliary functional means 16 after the power is regulated, by means of a DC power source circuit 15 (regulating means). Therefore, the functional means 16 can be made to operate with the electric power generated from the generator 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electric motor,
The present invention relates to a motor device having auxiliary function means.

[0002]

2. Description of the Related Art Conventionally, there are various industrial systems using electric motors, but all of them are not constituted by electric motors alone, but include associated machines (loads), control devices, display devices, and the like. , Is configured as a system. Therefore,
The power supplies used for them are also individually required.

In this case, AC100 is used as a primary power supply.
A commercial power supply such as [V], 200 [V], or 400 [V] is used, and it is used for an electric motor that performs a main task. A dedicated low-voltage DC power supply obtained by stepping down, further rectifying, and switching adjustment is generally used. In particular, a dedicated low-voltage DC power supply is indispensable for those displaying complicated and sophisticated displays.

[0004] However, if the display is mainly composed of only the electric motor and the counterpart machine, and the object to be displayed remains in the state of the electric motor, the cost of reducing the dedicated power supply from the commercial power supply to the system will reduce the system cost. Could be.

FIG. 9 shows an example. This device displays the number of rotations of a motor 3 driven by a variable speed driver 2 such as an inverter connected to a commercial power supply 1, and detects the rotation of the motor 3 by a rotation sensor 4 attached to the motor 3. And converts it to an electric signal.
Is a configuration for displaying the number of rotations in response to the electric signal.
In this case, the rotation speed indicator 5 requires a separate power supply (in many cases, direct current) for operating the rotation speed display 5. In order to generate this power supply, the commercial power supply 1 is stepped down, rectified, and converted to a constant voltage. The DC power supply circuit 6 is prepared.

[0006]

As described above, even in an apparatus in which a small-scale functional configuration is added to the electric motor 3, the DC power supply circuit 6 for generating the power supply for the electric power supply 3 has the commercial power supply 1
From the power supply to the specified voltage to produce a dedicated power supply is required. Therefore, the transformer and the switching element are required to have a large step-down capability, and the DC power supply circuit 6 as the adjusting means becomes expensive. This has led to an increase in the cost of the entire apparatus.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is mainly to provide a dedicated power supply for operating the auxiliary function means without requiring expensive adjustment means. Another object of the present invention is to provide a motor device capable of reducing the cost of the entire device.

[0008]

In order to achieve the above object, an electric motor device according to the present invention comprises: a motor driven by a main power supply; a power generating means for generating power by utilizing the rotation of the motor; Adjusting means for adjusting the power obtained by the means, and auxiliary function means operated by the power obtained by the means.

[0009] According to this, a dedicated power supply for the auxiliary function means can be created by utilizing the rotation of the electric motor which performs the main work, and the auxiliary function means can be made to function. In this case, since the output voltage of the power generating means that generates power using the rotation of the motor can be made smaller than that of the commercial power supply by setting, the adjusting means for adjusting the power does not need to have a large step-down capability. It can be used with an inexpensive device having a small step-down capacity.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a motor device employing a variable speed system. In this FIG.
The power supply 11 is a main power supply, and in this case, for example, is a three-phase 200 V or higher commercial power supply. This commercial power supply 11
, A variable speed driver 12 is connected, and a motor 13 is connected to the variable speed driver 12. The electric motor 13 is, for example, a three-phase induction motor and performs a main task of driving a load (not shown).

The variable speed driver 12 includes a commercial power supply 11
In this case, the motor 13 is an induction motor, for example, a general-purpose inverter, and also an inexpensive primary voltage controller or the like. obtain. Electric motor 13
, A power generating means, in this case, a single-phase generator 14 is directly connected to a rotating shaft 13 a of the electric motor 13 and a rotating shaft 14 a of the generator 14. When the motor 13 rotates, the generator 14 rotates similarly, and generates and outputs an AC voltage E according to the rotation speed.

A DC power supply circuit 15 is connected to the generator 14. The DC power supply circuit 15 functions as an adjusting means for receiving the output of the generator 14 and adjusting the output. The output of the generator 14 is stepped down and rectified, and includes a transformer, a rectifier circuit, a switching regulator, a low voltage circuit, and the like (all not shown).

The DC power supply circuit 15 includes an auxiliary function unit 1
6 are connected. The auxiliary function means 16 is, for example, a rotation speed indicator for displaying the number of rotations of the electric motor 11. The output of the DC power supply circuit 15 produces a low-voltage DC power supply suitable for operating the auxiliary function means 16. , Which are supplied to the auxiliary function means 16.

Therefore, in the case of the above configuration, the auxiliary function means 16 is supplied with power generated by the generator 14 and adjusted by the DC power supply circuit 15 based on the rotation of the motor 13 which performs the main task. Then, the auxiliary function means 16 is operated, and in this case, the rotation speed of the electric motor 11 is displayed.

As a result, in the present configuration, it is not necessary to supply power from the commercial power supply 11 to the auxiliary function means 16, and the output voltage of the generator 14 that generates power by using the rotation of the motor 13 is reduced. Since the power supply can be made considerably smaller than the commercial power supply 11, the DC power supply circuit 15 for adjusting the power does not need to have a large step-down capability, and should be an inexpensive one having a small step-down capability. Therefore, cost reduction of the entire apparatus can be desired. In the above configuration, the motor 13 is connected to the generator 14.
However, these may be connected via gears, pulleys, and the like to reduce the rotation and transmit the rotation. Further, the output of the generator 14 is not limited to a single phase, but may be a multi-phase.

2 to 8 show the second to eighth embodiments of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and will be described. Omitted, and only different parts will be described.

[Second Embodiment] In a second embodiment shown in FIG. 2, the non-load side (right side in the figure) of the rotating shaft 13a of the electric motor 13 is extended and protruded outside the frame 13b. A permanent magnet 21 which is a magnetic material is attached to the portion. The permanent magnet 21 is formed by alternately arranging N poles and S poles in the circumferential direction. A coil 22 is provided around an outer periphery of the permanent magnet 21 by an auxiliary frame 23. And a power generating means 24 replacing the above-described generator 14
Is composed. A rotor 13c is mounted on a rotating shaft 13a of the electric motor 13, and a stator 1
3d is provided.

As is well known, the motor 13 is rotated by the action of the stator 13d and the rotor 13c when an AC power is applied, and the permanent magnet 21 attached to the rotating shaft 13a is synchronized with this rotation. And the magnetic pole position changes. A rotation magnetic field is generated in the vicinity due to the rotation change of the magnetic pole position of the permanent magnet 21, and an AC voltage E determined by the change rate of the magnetic flux and the coil winding specification is induced at the terminal of the coil 22 in accordance with the change in the magnetic flux. This is the DC power circuit 1
5 is output.

Therefore, even in this case, the same operation and effect as those of the first embodiment can be obtained. In addition, since the power generation means 24 can be formed integrally with the electric motor 13, the size of the entire apparatus can be reduced.

[Third Embodiment] In a third embodiment shown in FIG. 3, a permanent magnet type motor is used for the motor 31 instead of the induction motor 13, and the stator 3 is used.
A permanent magnet 32, which is a magnetic material, is embedded in a rotor 31b corresponding to 1a. The rotor 31b is formed so as to be longer in the axial direction than the stator 31a together with the permanent magnet 32, and a coil 33 is disposed around the extension of the rotor 31b to constitute the power generation means 34.

In this embodiment, the electric motor 31 includes a permanent magnet 32 embedded in a rotor 31b and a stator 3
It rotates by the action of the rotating magnetic field created by 1a. At this time, the permanent magnet 32 rotated with the rotation of the rotor 31b
The AC voltage E is induced at the terminal of the coil 33 according to the change in the magnetic pole position of the coil 33, and is output to the DC power supply circuit 15.

Therefore, this embodiment also provides the same operation and effect as the first embodiment. In addition, the auxiliary function means 16 is operated by using the permanent magnet 32 used for the rotor 31b of the permanent magnet type electric motor 31. Since the power generation can be performed, the size of the power generation means 34 can be further reduced, and the size of the entire apparatus can be promoted.

[Fourth Embodiment] In a fourth embodiment shown in FIG. 4, a permanent magnet type motor similar to the above-described motor 31 is used for the motor 41.
The permanent magnet 4 which is also a magnetic material is also provided for the rotor 41b corresponding to
2 is buried. Further, a circuit board 43 is disposed and fixed in the frame 41c so as to face the axial end face of the rotor 41b. Thus, a planar coil 44 is mounted on the circuit board 43 so as to face the rotation locus of the permanent magnet 42 of the rotor 41b, thereby forming a power generation unit 45.

Further, in this case, on the surface of the circuit board 43 opposite to the side on which the planar coil 44 is provided, various electric and electronic components constituting the DC power supply circuit 46 similar to the DC power supply circuit 15 described above are provided. 46a is mounted and arranged.

In this embodiment, the electric motor 41 is, like the electric motor 31, a permanent magnet 42 embedded in the rotor 41b.
When rotating by the action of the rotating magnetic field generated by the stator 41a, an AC voltage is induced at the terminal of the planar coil 44 in accordance with the change in the magnetic pole position of the permanent magnet 42 rotated with the rotation of the rotor 41b. Are output to the DC power supply circuit 46.

Therefore, even in this case, the same operation and effect as those of the first embodiment can be obtained, and in addition, the coil 44 of the power generation means 45 can be simplified. Also, the circuit board 4
Since various electric and electronic components 46a constituting the DC power supply circuit 46 can also be mounted on the DC power supply circuit 3, a circuit for supplying power from the power generation means 45 to the DC power supply circuit 46 is also provided on the circuit board 43.
The circuit pattern can be easily configured. Furthermore,
Other necessary circuits can be provided on the circuit board 43. However, the circuit board 43 may be provided with only the coil 44 of the power generation means 45. In this case, the permanent magnet 42 is attached to the rotating shaft 41d of the electric motor 41 by the rotor 41b.
May be provided separately.

[Fifth Embodiment] In a fifth embodiment shown in FIG. 5, an induction motor similar to the above-described electric motor 13 is used for the electric motor 51, and the rotary shaft 51a of the electric motor 51 is located in the frame 51b. And a generator 52 as a power generation means. Further, a DC power supply circuit 53 similar to the DC power supply circuit 15 described above is also provided in the frame 51b.
The electric power generated by the generator 52 with the rotation of the electric motor 51 is supplied to this.

In this case, an electric fan 54 is provided outside the frame 51b as an auxiliary function unit which replaces the auxiliary function unit 16 described above. This electric fan 5
Reference numeral 4 denotes a motor 54a and an axial blower blade 54b which is driven to rotate by the motor 54a.
However, when the electric power generated by the generator 52 and adjusted by the DC power supply circuit 53 is supplied, the blower blades 54 b are rotationally driven to generate wind for cooling the electric motor 13.

In this embodiment, the rotating shaft 51a of the electric motor 51
Since the cooling of the electric motor 51 is performed by the electric fan 54 having the electric motor 54a different from the electric motor 51 as a driving source, unlike the motor 51 directly connected to the
In the low-speed rotation operation, the cooling capacity is increased to prevent overheating of the motor 51, or conversely, in the high-speed rotation operation of the motor 51, if the required cooling capacity is obtained, the rotation speed of the blower blade 54b is increased. , And a unique cooling operation different from the operation state of the electric motor 51 can be performed.

Moreover, even though the electric fan 54 is driven by an electric motor 54a different from the electric motor 51, the electric power is obtained by the operation of the generator 52 based on the rotation of the electric motor 51. Unlike the case where electric power for operating the electric fan 54 is obtained from another commercial power supply 11, no separate on / off control or the like is required to synchronize the operation and stop of the electric fan 54, so that the apparatus can be simplified accordingly. In this case, the power generation means is not limited to the power generator 52, and the power generation means 24, 34, and 45 of the second to fourth embodiments may be employed.

[Sixth Embodiment] In a sixth embodiment shown in FIG. 6, the above-described auxiliary function means is provided outside the frame 51b in the case of using the above-described motor 51, generator 52 and DC power supply circuit 53. A display circuit 62 having a light-emitting diode 61 as a light-emitting body is provided as an auxiliary function means replacing 16.

In this case, as the rotation of the motor 51 increases, the voltage output from the generator 52 via the DC power supply circuit 53 also increases, and accordingly, the light emitting diode 61 in the display circuit 62 reduces the luminance. In addition, the degree of rotation of the electric motor 51 is displayed by its luminance. Therefore, in this case, the rotation of the electric motor 51 can be displayed without specially requiring a power supply for display, and the electric motor 51 can be displayed.
However, it is also possible to display a continuation state of rotation such as rotation due to external force (load or the like) or inertial rotation after the power supply is stopped. Also in this case, the power generation means is not limited to the generator 52, but may be the power generation means 2 of the second to fourth embodiments.
4, 34, and 45 may be adopted. Further, the light-emitting body exemplified as the light-emitting diode 61 may be replaced with a lamp.

[Seventh Embodiment] In a seventh embodiment shown in FIG. 7, a permanent magnet synchronous motor is used for the motor 71. Therefore, the stator 71a and the rotor 71b corresponding to the stator 71a are used. A permanent magnet 72 which is a magnetic material is embedded.
Correspondingly, in the frame 71c, the rotor 7 is provided as an auxiliary function unit in place of the auxiliary function unit 16 described above.
A rotation position sensor for detecting the rotation position 1b, for example, a circuit board 74 on which a Hall element 73 is mounted, the above-described generator 52, and a DC power supply circuit 53 are provided. Insulated signal transmission means, such as a photocoupler 75, is transmitted to the variable speed driver 12.

In this case, since the electric motor 71 is a permanent magnet synchronous motor, it is necessary to transmit the rotational position of the rotor 71b to the variable speed driver 12 in order to operate the electric motor. For detecting the rotational position of the rotor 71b, a simple position detecting method using the above-described Hall element 73 is adopted. It is a photocoupler 75 (insulated signal transmission means).

For this reason, a separate power supply is required on the side of the Hall element 73 as well as on the side of the variable speed driver 12, and this power supply is supplied from the motor 71 to the generator 52 and the DC power supply circuit
3 to get through. Thus, there is no need to provide a separate power supply on the variable speed driver 12 side for the Hall element 73 and supply it to the Hall element 73, which is commonly performed, and the apparatus can be simplified. Also in this case, the power generation means is not limited to the generator 52, and the power generation means 24, 34, and 45 of the second to fourth embodiments may be employed.

[Eighth Embodiment] An eighth embodiment shown in FIG. 8 uses a motor 51, a generator 52, and a DC power supply circuit 53 of the fifth embodiment.
In addition to the above, a rotation speed indicator 81 is provided as an auxiliary function unit that replaces the auxiliary function unit 16 described above. The rotation number display 81 detects the rotation of the electric motor 51 by a rotation sensor such as a resolver or an encoder (not shown), and converts the rotation into an electric signal. Therefore, electric power for this purpose is obtained from the electric motor 51 via the generator 52 and the DC power supply circuit 53.

In this embodiment, the number of revolutions of the electric motor 51 can be displayed without specially requiring a power source for displaying the number of revolutions of the electric motor 51 by the number-of-rotations indicator 81. Also in this case, the power generation means is not limited to the generator 52, and the power generation means 24, 34, and 45 of the second to fourth embodiments may be employed. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

[0038]

The present invention is as described above.
The following effects are obtained. According to the electric motor device of claim 1,
Since a dedicated power supply for the auxiliary function means can be created by using the rotation of the electric motor which performs the main task and the auxiliary function means can be operated, the dedicated power supply for operating the auxiliary function means is expensive adjustment means. And the cost of the entire apparatus can be reduced.

According to the second aspect of the present invention, the power generating means for operating the auxiliary function means can be formed integrally with the motor, so that the overall size of the apparatus can be reduced. According to the motor device of the third aspect, power generation for operating the auxiliary function means can be performed using the permanent magnet used for the rotor of the permanent magnet type motor, so that the power generation means can be further reduced in size. ,
It is possible to promote downsizing of the entire device.

According to the motor device of the fourth aspect, the coil of the power generation means for operating the auxiliary function means can be simplified. According to the electric motor device of the fifth aspect, the cooling operation unique to the electric fan, which is different from the operation state of the electric motor,
The operation can be performed in synchronization with the electric motor without requiring another on / off control or the like, and the apparatus can be simplified.

According to the motor device of the sixth aspect, the power can be displayed without specially requiring a power supply for displaying the rotation of the motor, and the rotation of the motor due to the external force after the power supply is stopped, and the like. The display of the continuous state of rotation, such as inertial rotation, can also be performed. According to the electric motor device of claim 7,
The rotation position of the motor can be detected without the necessity of producing a separate power source on the side that controls the operation of the motor, and the apparatus can be simplified. According to the motor device of the eighth aspect, the number of revolutions of the motor can be displayed by the number of revolutions display without requiring a special power source for displaying the number of revolutions of the motor by the number of revolutions display.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of the present invention.

FIGS. 2A and 2B show a second embodiment of the present invention, and FIG.

FIGS. 3A and 3B show a third embodiment of the present invention, and FIG.

FIGS. 4A and 4B show a fourth embodiment of the present invention, and FIG.

FIG. 5 is a view corresponding to FIG. 1, showing a fifth embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 1, showing a sixth embodiment of the present invention;

FIG. 7 is a view corresponding to FIG. 1, showing a seventh embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 1, showing an eighth embodiment of the present invention;

FIG. 9 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

11 is a commercial power supply (main power supply), 12 is a variable speed driver, 13 is an electric motor, 14 is a generator (power generation means), 15 is a DC power supply circuit (adjustment means), 16 is an auxiliary function means, 21
Is a permanent magnet (magnetic body), 22 is a coil, 24 is a generator, 31 is a motor, 31b is a rotor, 32 is a permanent magnet (magnetic body), 33 is a coil, 34 is a generator, 41 is a motor, and 42 is a motor. Permanent magnet (magnetic material), 43 is a circuit board, 4
4 is a plane coil, 45 is a power generation means, 46 is a DC power supply circuit (adjustment means), 51 is a motor, 52 is a generator (power generation means), 53 is a DC power supply circuit (adjustment means), 54 is an electric fan, and 61 is an electric fan. A light emitting diode (light emitting body), 71 is an electric motor, 72 is a permanent magnet (magnetic body), 73 is a Hall element (rotational position sensor), and 81 is a rotation speed indicator.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoshi Kashira 2121, Nagoya, Asahimachi, Mie-gun, Mie Prefecture Inside the Mie Plant of Toshiba Corporation (72) Inventor Yoshinobu Nakamura 2121, Naoji, Asahimachi, Mie-gun, Mie F-term in Toshiba Mie Plant (reference) DD19 EE28 EE31 FF21 FF36

Claims (8)

[Claims] 1. A motor driven by a main power supply, a power generating means for generating electric power by using the rotation of the motor, and an adjusting means for adjusting the electric power obtained by the power generating means. An electric motor device comprising auxiliary function means operated by electric power obtained by the means. 2. A power generation means comprising a magnetic body whose magnetic pole position is changed by rotation of an electric motor, and a coil which induces a voltage in accordance with a change in the magnetic pole position of the magnetic body. Motor device. 3. The electric motor device according to claim 2, wherein the electric motor uses a permanent magnet for the rotor, and the permanent magnet is used as a magnetic body of the power generation means. 4. The power generating means according to claim 2, wherein the coil of the power generating means comprises a planar coil disposed on a circuit board.
The electric motor device according to the above. 5. The electric motor device according to claim 1, wherein the auxiliary function means is an electric fan for cooling the electric motor. 6. The electric motor device according to claim 1, wherein the auxiliary function means is a light emitter for displaying the rotation of the electric motor. 7. The auxiliary function means according to claim 1, wherein the auxiliary function means is a rotation position sensor for detecting a rotation position of the electric motor.
5. The electric motor device according to any one of claims 4 to 4. 8. The motor device according to claim 1, wherein the auxiliary function means is a rotation speed indicator for displaying a rotation speed of the motor.