JPH01283093A - Variable speed induction motor - Google Patents

Abstract

PURPOSE:To prevent a torque from decreasing due to a leakage reactance by covering all surface of a conductor or a resistance material provided between a plurality of rotor cores with a heat resistant material or a nonmagnetic material. CONSTITUTION:A plurality of conductors 5 connected in series are connected to be short-circuited through resistors (r) in an insulation nonmagnetic core 9 interposed between rotor cores 2 and 3. On the other hand, stators 31, 25 on which windings 22, 23 are provided outside the cores 2, 3 are disposed oppositely. Here, the stator 31 is composed rotatably to a stator 25 by a motor 35. The whole surfaces or several of one or both of the conductors 5 or the resistive material (r) are covered with a heat resistant material or a nonmagnetic material. Thus, it can prevent a torque from decreasing due to a leakage reactance, and can also prevent the conductor or the resistance material from deforming due to heat generation.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an electric motor that can change the speed control range over a wide range from low speed to high speed. A plurality of conductors installed in each of the rotor cores are short-circuited via a resistive material, and either the plurality of conductors or the plurality of resistive materials is connected to one or both, the entire surface thereof, or the prize by a heat-resistant material. Alternatively, the present invention relates to a technique for improving durability by preventing a decrease in torque due to leakage reactance and preventing oxidation caused by heat generation of a conductor or resistive material by using a structure surrounded by a non-magnetic material.

[Prior art and its problems]

Conventionally, star-delta starting, reactor starting, starting compensator starting, etc. are known as means to suppress the starting current when starting a squirrel-type induction motor used for boat fishing, but none of these methods This means also has the disadvantage that it is only possible to suppress the rotational speed in stages, and that it is not possible to control the operation by appropriately changing the suppression value set for the starting current in the starting device.

In addition, in wire-wound motors, it is possible to perform stepless control from startup to desired rotational speed relatively easily by changing the resistance value of the secondary resistor, but on the other hand, the configuration of the control device is There are problems such as high cost and troublesome control operations, and it cannot be used in squirrel cage induction motors.

To address the above problems, for example,
Publication No. 86807 proposes an asynchronous electric motor having a stator with polyphase windings and a squirrel-cage rotor, consisting of conducting bars, short-circuited end rings and ferromagnetic laminations. consists of a first and a second winding section, which sections are arranged coaxially adjacent to each other and to different parts of the rotor and can be supplied with an alternating current of the same frequency, and An asynchronous electric motor provided with means for varying the electromotive force induced in the rotor windings by a second winding section, the motor being provided with means for varying the electromotive force induced in the rotor windings by means of a second winding section; Although it is possible to change the rotation speed by setting a phase difference, the torque is small except when the phase angle between the two stator sections is in the same phase, and the operation stops immediately when a load is applied. The problem is that it cannot be used as a power source that frequently repeats starting and stopping when a load is connected, and the bar that communicates between the two terminals is non-magnetic. No material core is installed, which prevents torque from decreasing due to leakage reactance.
The technology to prevent oxidation caused by heat generation in the bar remained unresolved.

Furthermore, the technology disclosed in Japanese Patent Application Laid-Open No. 54-19005 has two sets of stators each having independent stator windings facing two sets of rotor cores installed on the same axis. and a squirrel-cage conductor that is commonly installed across the two sets of rotor cores and short-circuited at both ends via short-circuit rings, and a central location of the squirrel-cage conductor between the two sets of rotor cores. It is equipped with a high-resistance element that shorts between the squirrel cage conductors, and windings are provided on independent stators facing the rotor core, and the phase between the stator windings is set to 1 during startup.
This is a twin core squirrel-cage type motor that supplies power by shifting the stator windings by 80 degrees and matching the phase during operation after startup, but this machine increases the starting torque by shifting the phase of the stator windings by 180 degrees at the time of startup. This feature improves starting characteristics, and during operation, the phases of the stator windings are aligned with each other, allowing operation with normal torque characteristics. Therefore, even if the effect of improving startability is recognized, this electric motor is not a variable speed electric motor and cannot be used as a power source for a load that requires speed change.

To describe the technology disclosed in Japanese Patent Application Laid-Open No. 54-29005 in more detail, when transitioning from startup to operation,
One example is to provide an intermediate step that instantly connects the mutual power supply circuits of the stator windings in series for the purpose of alleviating the shock caused by sudden fluctuations in torque.
The phase shift of the rotating magnetic field is limited to both Oo and 180 degrees, and is not intended for speed change purposes. Moreover, by switching to series, the voltage applied to the stator is halved, so the torque is reduced to 1/4, and this makes it impossible to fully control the speed change, which is the main point disclosed in this bulletin. It is clear that this is not intended for speed shifting, and although it is said that there is an intermediate step in which the stator windings are switched between series connection and parallel connection with respect to the power supply circuit, this series connection is not intended for speed shifting. It is just a completely useless connection, and it is not possible to control the speed change to any desired speed. Also, it is not possible to control the speed change to any desired speed. This also left unresolved technologies to prevent torque reduction due to leakage reactance and to prevent oxidation due to heat generation in squirrel cage conductors or high resistance materials.

In Japanese Patent Publication No. 27-4357, the stator is divided into two sets, a fixed stator and a movable stator, each with the same winding and connected to the same power source, and the rotor is also divided into two sets, and the rotor is divided into two sets, a fixed stator and a movable stator. The conductors are connected as separate conductors with a wide center section, and both ends are connected with short-circuit rings. Cooling ventilation holes are provided in the machine frame, and the center section of the secondary conductor is made separate to achieve a cooling effect. A configuration to increase the size is disclosed, but this technology also has
The windings of both stators are not connected in series, and the secondary conductors in the center are not short-circuited using a high resistance element, so it corresponds to the operating characteristics of the load at startup and in the low/medium speed range. It was not possible to produce sufficient output, and this one also lacked technology to prevent leakage reactance and oxidation.

[Purpose of the invention]

The present invention is intended to improve the drawbacks of the above-mentioned conventional techniques, and is
It has a unique torque characteristic that cannot be achieved by the sum of the Patent Publication No. 9005 and Japanese Patent Publication No. 27-4357, and the speed control range is wide from low speed to high speed, and the speed change is controlled by a voltage phase shift device. In addition, multiple speed induction motors with torque characteristics and efficiency that appear by applying a rated current almost equivalent to that at the maximum rotational speed over the entire speed range from the starting point to the maximum rotational speed. By surrounding the conductors or one or both of multiple resistive materials with a heat-resistant material or non-magnetic material, the entire surface or prize is surrounded by a heat-resistant material or a non-magnetic material to prevent torque reduction due to leakage reactance and to prevent torque reduction due to heat generation of the conductor or resistive material. In addition to improving durability by preventing oxidation, the present invention aims to provide a technology that prevents deformation caused by heat generation in conductors or resistive materials.

The variable speed induction motor of the present invention is used by being connected to a single-phase or three-phase power supply, and the rotor has a normal squirrel cage type, a double squirrel cage type, or a deep groove cage type.

It can be applied to any type of special squirrel-cage rotor core, etc., and the conductors used in the explanation of the present invention refer to conductors installed in the squirrel-cage rotor core and conductors wound around the wound rotor core. It is a general term for each of the windings installed in the winding, and connecting the plurality of stators in parallel to the power supply, or connecting the plurality of stators in series can be arbitrarily selected. It can be adopted by

[Means for solving problems]

In order to achieve the above-mentioned technical problem, the present invention connects each of a plurality of conductors installed in each of a plurality of rotor cores that are fixed to a rotating shaft at arbitrary intervals to achieve integral rotation. The plurality of conductors are short-circuited by a resistive material between the plurality of rotor cores formed in the rotor core and installed in each of the rotor cores, and the plurality of conductors are connected concentrically with the plurality of rotor cores and on the outer periphery thereof. Multiple stators are installed in parallel and opposite each other in the section.
In the electric motor provided with a voltage transfer device in association with at least one stator among the plurality of stators installed in the inner periphery of the machine frame, the plurality of conductors are connected between the plurality of rotor cores and the plurality of conductors. Alternatively, one or both of the resistive materials may be entirely or partially surrounded by a heat-resistant material or a non-magnetic material as a means for solving the above-mentioned problems.

[For production]

In the present invention, since a voltage phase shifter is provided in relation to at least one stator among the plurality of stators, the phase of the voltage induced between the plurality of stators and the phase of the voltage induced between the plurality of stators can be changed. A phase shift occurs in the phase of the voltage induced between the multiple wound conductors and the other multiple conductor, and the voltage induced in the rotor conductor is adjusted by adjusting the degree of phase shift. The rotation speed of the rotor can be changed arbitrarily by controlling the increase or decrease.

In addition, since the plurality of conductors wound around the plurality of rotor cores are short-circuited through the resistive material between the plurality of rotor cores, the plurality of conductors are short-circuited through the resistive material, especially at startup and during low rotational speed operation. Electric current inevitably flows from the plurality of conductors provided in the rotor core through the resistive material, making it possible to generate strong rotational torque.

By the way, since one or both of the plurality of conductors or the plurality of resistance materials communicating between the plurality of rotor cores is surrounded entirely or partly by a heat-resistant material or a non-magnetic material, the leakage reactance is To prevent a decrease in torque due to heat generation, and to prevent damage to the stator windings due to contact by preventing deformation of the conductor or resistance material due to heat generation.
Furthermore, it is effective in preventing oxidation caused by heat generation of the conductor or resistance material and improving durability.

〔Example〕

Embodiments of the present invention will be described based on FIGS. 1 to 22.

A first embodiment of the present invention will be explained with reference to FIGS. 1 to 3.

Reference numeral 1 shown in FIG. 1 is a variable speed induction motor according to the present invention, and the induction motor 1 has the following configuration. Rotor cores 2.3 made of iron cores are mounted on a rotor shaft 4 with arbitrary intervals, and an insulating non-magnetic core 9 is interposed between the rotor cores 2.3. In the non-magnetic core 9 section between the rotor cores 2 and 3, a plurality of conductors 5... It may be integrally formed surrounding the area, or it may have openings at appropriate locations.

Each of the plurality of conductors 5... installed in the rotor core 2.3 is connected in series to form an integral rotor 8, and the plurality of conductors 5... connected in series are connected in series. Both ends are connected by short-circuit rings 6 and 7. Further, a plurality of ventilation cylinders 12 . . . are provided in the rotor core 2.3 and the non-magnetic core 9, which communicate with both side portions 10.11 of the rotor 8. The plurality of conductors 5... installed in the rotor 8 are made of nichrome wires that serve as connecting materials for each of the plurality of conductors 5... in the non-magnetic core 9 portion between the rotor cores 2 and 3. , carbon-containing steel 9 are short-circuited and connected via a resistive material r such as conductive ceramic, and an insulating coating may be applied to the outer peripheral surface of the conductor 5... or the resistive material r... be. The non-magnetic core 9 is equipped with a plurality of cooling bodies 13 made of a non-magnetic material such as aluminum material, stainless steel, ceramic material, resin, rubber, glass, etc., coated with an insulating coating. The cooling blade is formed on the vehicle body 13A. The cooling body 13 can be formed by forming the non-magnetic core 9 into a cooling fan using the above-mentioned arbitrary non-magnetic material, or by forming the cooling body 13 into various shapes and attaching the cooling body 13 to the rotor core 2. , 3 may be mounted on one or both inner surfaces of the rotor core 2.3, and an arbitrary type of cooling body may be mounted on the rotor shaft 4 in the space of the rotor core 2.3. Forming the resistive material r..., for example, in a zigzag shape or any other arbitrary cooling stirring body in the cooling action body 13, and cooling the resistive material r... as a cooling stirring body in various shapes using any of the above-mentioned non-magnetic materials. The cooling effect members 13 may be formed with an insulating coating. Incidentally, one or both sides of the inner surface of the rotor core 2.degree. 3 may be provided with heat-resistant material such as asbestos, ceramic material, etc., which is treated with insulation. (See Figures 1 and 2) Bearing discs 15 and 16 provided on both sides of the cylindrical machine frame 14 are integrated by connecting rods 17 with bolts at both ends and nuts 18. The cooling impellers 19.20 are mounted on both sides of the rotor 8, and both ends of the rotor shaft 4 are supported by bearings 21.21 fitted in the bearing discs 15.16, and the rotor 8 is rotated. The child 4 is rotatable.

A winding 2 is concentrically arranged on the outer side of the rotor core 2, 3.
The rotating stator 31 and the second stator 25 subjected to 2.23 are arranged facing each other in parallel, and a sliding bearing 26 is installed between the machine frame 14 and the rotating stator 31, and the sliding bearing 26 is installed between the machine frame 14 and the rotating stator 31. The left and right movement is fixed by the stop ring 28 fitted in 14,
The machine frame 14 and the second stator 25 are fixed by a ventilation fixing ring 27A and a fixing ring 27B, which are provided with ventilation windows at several locations. A gear 33 is fitted on the outer peripheral surface of one side of the rotary stator 31, and a drive gear 36 is connected to a small motor 35 for forward and reverse rotation, which is formed by a drive device 29 fixed on the outer periphery of the machine frame 14. A plurality of ventilation holes 39 are formed in the outer periphery of the machine frame 14, and a plurality of ventilation holes 40 are formed in the bearing discs 15, 16.

Ventilation is provided in a space 66 formed between the rotor cores 2 and 3, the rotary stator 31 mounted on the sliding bearing 26, and the second stator 251 fixed to the ventilation fixing ring 27A and the fixing ring 27B. A plurality of openings are formed in the machine frame 1 to communicate with the blower body 67, and the plurality of openings are formed into an arbitrary number of blower ports 68 and exhaust ports 69. A motor 72 which is pivoted to a windmill 71 is attached to a blower body 70 to form a blower device 73, and the motor 72 is formed to be able to freely rotate in forward and reverse directions. In some cases, it is formed so that the speed can be changed freely.

The blower device 73 is fixed to the machine frame 14, and the blower device 7
The air intake part 74A of No. 3 is connected to the air outlet 69 to communicate with the ventilation body 67, and the air outlet 6 introduces outside air from the other side of the air outlet 69.
8 is connected to ff1WA67, and the blower cylinder 70 is provided with an air exhaust portion 74B.

The driving gear 36 partially inserted into the machine frame 14 through the opening 37 is engaged with the gear 33 fitted to the rotating stator 31, and a small motor 35 equipped with a switch and forming the driving device 29 is connected. A second stator 25 is connected to the rotating stator 31 via a rotating mechanism 30 consisting of a gear 33 and a drive gear 36 so that the rotating stator 31 can freely rotate, and is fixed to the machine frame 14. A rotary stator 31 is provided in the voltage phase shifter 100 and is rotatable in relation to the voltage phase shifter 100 .

A magnetic sensor 32 is attached to the outer peripheral surface of the rotating stator 31,
A plurality of magnetic detectors 34 with different terminal diameters for detecting magnetism in relation to the magnetic sensor 32 are embedded in a non-magnetic plate 41, and the non-magnetic plate 41 is attached to the inner peripheral surface of the machine frame 14. The magnetic sensor 32 and the magnetic sensing body 34 form a rotational position detector 42, and the magnetic sensor 32 is
It is electrically connected to a display 43 into which the rotational position of the rotational stator 31 set for each magnetic detection body 34 is input. Reference numeral 38 is a solenoid that controls the entry and exit of the protruding piece. A speed detector 44 such as a tacho generator is mounted on the rotor shaft 4, and the speed detector 44 is connected to a speed indicator 45. Note that the speed detector 44 is not limited to being attached to the rotor shaft 4 (a non-contact tachometer such as a strobe type tachometer or a photoelectric tachometer may be attached to the rotor cores 2, 3, or a non-contact type tachometer). It may be used in conjunction with the magnetic core 9, conductor 5, etc.

Winding 2 with star connection applied to each of the second stator 25
2.23 are connected in series. That is, the terminals A, B, and C of the winding 22 of the rotary stator 31 are connected to the commercial three-phase power supply A, B, and C, and the terminals a, b, and c of the winding 22 are connected to the second stator 25. Connected to terminals A, B, and C of the winding 23,
Terminals a, b, and c are short-circuited and connected.

The effects of the above-mentioned constituent films will be explained below.

When the windings 22.23 are energized from a commercial three-phase power source, a rotating magnetic field is generated in the rotating stator 31.25, voltage is induced in the rotor 8, and current flows through the conductors 5 of the rotor 8. The rotor 8 rotates. The second stator 25 with respect to the rotating stator 31
When each cause of rotation is set to zero, there is no phase shift in the magnetic flux of the rotating magnetic field generated in each stator 31.25, and the details will be explained later when the resistance material r.
Since no current flows through the motor, it has the same torque characteristics as a general induction motor.

Next, a case will be described in which the small motor 35 is operated to rotate the rotary stator 31, and the rotary stator 31 is rotated by an electrical phase angle of θ. Rotating stator 31 and second stator 25
The magnetic flux of the rotating magnetic field created by φ1. The phase of φ2 is shifted by θ, and therefore the voltage 6+ induced in the conductor 5 of the rotor 8 by the rotating stator 31 and the second stator 25 and the phase of white are shifted by θ. Now, with the voltage 0 induced by the second stator 25 in the conductor 5 of the rotor 8 as a reference, the voltage is 62=SE. Here, S is slip and E is the induced voltage when slip is 1. At this time, the voltage d1 induced in the conductor 5A by the first stator 24 is 6+=SEεJO.

(E = induced voltage when slip is 1) What is shown in Fig. 4 is the case where the resistive material "..." which short-circuits the plurality of conductors 5... is not installed in the non-magnetic core 9 section. This shows the relationship between the slip S of the rotor 8 and the active power P input to the rotor. When the voltage phase is θ = 0°, the active power P is maximum, and when 0° < θ < 180°, the active power P is the maximum. Here, if the resistance and inductance of the conductor 5 are R and L, and the angular frequency of the power source is ω, then the maximum active power P is S = (R/
It appears when ωL).

Active power P1. Since it is proportional to the driving torque of the induction motor 1, the voltage induced in the rotor 8 is adjusted by operating the small motor 35 and rotating the rotary stator 31 with respect to the second stator 25, and the rotation The speed of the child can be controlled steplessly.

Next, let R1 and R2 be the respective resistances from the short-circuit rings 6 and 7 of the conductors 5 of the rotor 8 to the connecting material, let Ll and L2 be the inductances, let ω be the angular frequency of the power supply, and let each conductor 5 If the resistance of the resistive material that short-circuits each of ... is r, the electrical equivalent circuit of the rotor 8 is as shown in Fig. 6, and the symbols I+ and 12.13 indicate the current flowing through each branch. It is something.

Next, when converting the circuit shown in Fig. 5 into an equivalent circuit seen from both stator 31.25 sides, it becomes as shown in Fig. 6, and RI=R
2, L, when I=L2 and θ=0°, l3=II-r
2 = O, and no current flows through the resistor material. This means that when θ = 0°, the torque T is equal to the value when there is no r. Therefore, θ = 0°
When , it will have the same torque characteristics as a conventional induction motor.

Next, when RI=R2, Ll=L2 and θ=180°, I+=-I2. l3=11-l2=211,
In a conventional induction motor, the resistance of the rotor conductor is R+-R.
If 2=R, the result is the same as if R were increased to R+2r.

As the rotor 8 rotates, outside air is sucked into the machine frame 14 by the cooling impeller 19° 20 from the ventilation holes 40 bored in the bearing disc 15, 16, and !
22. Rotor core 2. The conductors 5, etc. are cooled and expelled to the outside of the machine frame 14 through the exhaust holes 39A, and the cooling W wheel 20 sucks the excess air with the impellers 1-9. The ventilation cylinder 12... is made to flow inside, and the rotor core,
The non-magnetic core 91 cools the rotor core 3, and the air drawn from the bearing disc 16 is merged with the winding 23. Second stator 2
5 is ventilated for cooling, and the exhaust is ventilated through the ventilation fixed link 27.
The windings 22, 23, rotor cores 2, 3, non-magnetic material 9. A function is stably exerted on each of the conductors 5...

Next, FIG.
This will be explained next with reference to FIG.

Since the windings 22 and 23 are connected in series, current flows between the windings 22 and 23 from the commercial 3-phase power supply.
．． 23 or re-stator 31.
25, the magnitude of the current flowing through each winding 22, 23 is the same regardless of the difference in the magnitude of the capacitance of the rotary stator 31 and the second stator 25. The magnitude of the current induced in the conductor 5 of the child 8 becomes equal, and the rotating stator 31... The magnitude of the current flowing from each of the stators 31 and 25 to the conductor 5 of the rotor 8 becomes equal depending on the rotation difference with respect to the second stator 25, that is, the phase shift that occurs in the magnetic flux of the rotating magnetic field. The effect of generating a forcing force, and the re-stator 31.
A force is generated in that the vector difference current caused by the phase difference between the voltages between the conductors 5 inevitably flows through the resistive material r that connects each of the plurality of conductors 5. As shown in the slip and torque characteristics shown in Figure 7, the synergistic effect between the two speed ranges makes it possible to improve efficiency and generate large torque in each speed range. It is easy to use, and can be used to suit the starting characteristics of the load for smooth startup or high-output startup, making it ideal for power sources that frequently start and stop. . As mentioned above, the speed of the rotor 8 is changed by rotating the stator 3.
1 to control the phase shift and conductor 5 of rotor 8...
The rotational speed of the rotor 8 can be changed arbitrarily only by increasing or decreasing the current flowing through the rotor 8.

Note that the rotating stator 31 has windings 22 and 23 connected in series.
and the second stator 25 to the conductor 5 of the rotor 8, respectively.
・Multiple conductors 5...
The ratio of the current that flows through a short circuit through the resistive material r... is determined by the value of Pθ (P = number of pole pairs, θ = phase angle), regardless of the resistance value and slip of the resistive material r... (The above ratio is maximum when Pθ = π and becomes zero when Pθ = 0.) If Pθ is constant, the same slip as when the secondary insertion resistance of a general wound induction motor is constant. When it comes to torque characteristics, when Pθ becomes small, the ratio of current flowing through the conductor 5 of the rotor 8 becomes small, and reducing Pθ means reducing the secondary insertion resistance of a general wound induction motor. It will have the same effect. and re-stator 31
．． 25, even if the phase difference θ is arbitrarily changed, the rated current and rated torque characteristics of the maximum speed can be changed depending on the selection of the slip value and the design of the resistance value of the connecting material. Almost the same effect can be achieved in other areas as well.

In addition, the windings 22.2 of the rotary stator 31 and the second stator 25
3 are connected in series, if a connecting material is provided between the conductors 5 and there is no short circuit, almost no current will flow through the rotor conductors 5 when there is a phase difference. This results in a phenomenon in which the efficiency and torque are significantly lower than when the windings 22, 23 of the re-stator 31, 25 are connected to the power supply in parallel.

In contrast to the above, the winding 2 of the rotary stator 31 and the second stator 25
2.23 are connected in parallel to a commercial three-phase power supply, the windings 22.
23 are equal, the voltages induced from each of the re-stators 31.
The current flowing through the resistance material r... which serves as a connecting material between... is (1/2) x (differential voltage induced in the rotor conductor from each of the first and second stators) ÷ ( The current is almost proportional to the resistance value of the resistance material ``...''. However, in addition to the current flowing through the resistance material r..., the conductor 5 of the rotor 8 sum voltage induced in the conductor) ÷ (
A current approximately proportional to the impedance of the rotor conductor flows in a superimposed manner. (The above sum voltage is calculated when Pθ=π is zero and P
It is maximum when θ = 0, and the impedance of the rotor conductor is composed of the resistance of the conductor and the secondary leakage reactance, so it varies depending on the slippage.) Therefore, for the magnitude of the current flowing through the conductor 5 of the rotor 8, multiple conductors 5
The ratio of current flowing through the resistive material r... between... varies depending on the slip and resistance value even if Pθ is constant, and the slip and torque characteristics when Pθ is constant are similar to those of general wound wire induction. The characteristics shown in Figure 9 are a mixture of the characteristics when the secondary insertion resistance of the motor is constant and the characteristics when the primary voltage of a general induction motor is controlled. The speed control range is narrower than the characteristic when windings 22 and 23 of 31.25 mm are connected in series.

By the way, when the variable speed induction motor 1 starts operating (see FIG. 2), if the rotational position of the rotary stator 31 detected by the magnetic sensor 32 is, for example, 60 degrees in electrical angle,
If the power is turned on without considering the starting characteristics of the load connected to the rotor shaft 4, the electric motor 1 may not be able to start or may not start properly if a load that requires a large starting torque is connected. Conventionally, the problem was ensuring sufficient space for the equipment, but the features of the present invention are that the starting equipment is miniaturized, the starting is smooth, and the speed is freely variable. In this configuration, before starting the operation of the electric motor 1, the magnetic sensor 32 of the rotation position detector 32 detects where the rotation fixed position of the rotation stator 31 is. For example, the rotational position of the rotational stator 31 can be detected by the magnetic detection body 34c.
The magnetic sensor 32 detects and informs the display 43,
According to the signal value on the display 43, the rotary stator 31
Digitally displays the rotational position of 60 degrees in electrical angle. Based on the display of the rotational position, the solenoid 38
is activated to unlock the gear 33, and at the same time, the small motor 35 is reversed by the switch to rotate the rotor shaft 4.
For example, the rotating position of the rotary stator 31 may be set at 1 electrical angle so that the starting speed corresponds to the starting characteristics of the load connected to the
In the case of 50°, the magnetic sensor 32 detects the magnetic sensing body 34 and operates the rotary stator 31 until the display 43 displays 150°, which is the target starting rotational position of the rotary stator 31.
When the target starting rotation position is displayed, the operation of the small motor 35 is stopped, and the solenoid 38 is activated to lock the gear 33 and fix the rotation of the rotation stator 31.

After the above operation is completed, when the windings 22 and 23 are energized from the power supply, the rotor shaft 4 starts the rotary stator 31 at a smooth rotational speed corresponding to the starting rotation position, and then the solenoid 3
8 to unlock the gear 33, operate the switch to rotate the small motor 35 in the forward direction, detect changes in the rotational speed of the rotor shaft 4 with the speed detector 44, and detect the change in the rotation speed of the rotor shaft 4. When the speed indicator 45 detects that the rotational speed has reached the desired rotational speed, the small motor 35 is stopped and the solenoid 38 is activated to lock the gear 33 and fix the rotation of the rotary stator 31.

Note that the rotational position of the rotational stator 31 at the time of startup is set to an arbitrary rotational position corresponding to the startup characteristics of various loads connected to the rotor shaft 4, and the magnetic It goes without saying that mounting any number of sensors 32 may be selected as appropriate.

After adjusting the target rotation position, when the start switch is input and the motor 72 of the blower device 73 is activated to rotate the windmill 71, the wind turbine 71 sucks the outside air into the blower port 6.
8 to the ventilation shell 67, and the outside air is passed to the cooling body 13.
The inside of the ventilation shell 67 is stirred to cool and radiate heat from the non-magnetic core 9 or the conductor 5 . . . , the resistance material r .
The air inside the air blower 70 is sucked into the air blower 70 through the air outlet 69 and exhausted to the outside of the air blower 70 through the air outlet 74B.

In the case of operation in a high speed region, the air blowing action of the cooling impeller 19, 20 sucking outside air is circulated through the ventilation barrel 12... to cool the rotor cores 2, 3 and the non-magnetic core 9. , the conductor 5..., the resistor material r... exerts a heat dissipation effect, and the exhaust air is discharged to the air exhaust cylinder 39A....

Since it is discharged from each of 39B..., the resistance material r.
The heat generated by ... does not become very high and no heat is stored. However, in the low/medium speed rotation range where the speed is changed, the heat generated by the resistance material r... increases rapidly, so the blowing action of the cooling impeller 19, 20 alone has the function of dissipating heat from the resistance material r... However, the blower device 73 introduces outside air into the ventilation WA 67 to cool and radiate heat from the non-magnetic core 9 and the resistance material r... and exhausts the waste heat from the ventilation shell 67.
, the resistance material r... is cooled and heat radiated regardless of the change in the rotational speed of the electric motor 1, and the electric rotating band is effectively operated, and the heat generation of the resistance material r... The durability of each of the nonmagnetic cores 9 involved in heat generation can be improved and maintained.

Note that the air exhaust port 74B of the air blower 73 is communicated with an arbitrary number of air outlets 68 provided in the machine frame 14, and outside air is introduced into the ventilation shell 67 by the air blown by the air blower 73, and the exhaust air is transferred to an arbitrary number of air outlets 68 provided in the machine frame 14. It may be configured to be excluded from the air outlet 69.

In any case, since the outside air is introduced into the ventilation shell 73 from one side of the machine frame 14 and the exhaust air is exhausted from the other side of the machine frame 14, the resistance material r... and the non-magnetic core 9 are cooled. The air outlet 68. can have an effective effect on heat radiation. Air exhaust port 6
There may be a plurality of 9s.

In addition, as shown in FIG. 9, a pump 102 is installed in the water tank 101.
A refrigerant device 104 formed by a radiator 103 connected via a radiator 103 is connected to an air blower 068 to cool the air introduced into the ventilation WA 67 to cool the non-magnetic core 9. Resistance material r...
Cooling heat dissipation works more effectively. Although not shown, the refrigerant device 104 includes a cooler, a condenser, and a refrigerant gas.

The configuration with various other refrigerant devices can be arbitrarily selected and implemented, and as the rotor shaft 4 changes speed from high speed rotation to low speed rotation, the blower device 73
The rotational speed of the blower device 73 and the refrigerant device 104 may be controlled toward high speed rotation, and during high-speed operation of the electric vJta1, the motor 72 or one of the refrigerant bags @104 is turned ON, 0FFIljllll However, energy saving may be prioritized while checking the relationship with the electric efficiency of the electric motor 1 based on data. Note that the blower device 73. Each of the other refrigerant devices 104 is connected to the machine frame 1.
It is possible to arbitrarily select and implement the arrangement of disposing them elsewhere and communicating with the air outlet 68 or the air outlet 69 via a duct without directly connecting them to the air outlet 68 or the air outlet 69.

In the above, the rotating stator 31 with respect to the second stator 25
Although a configuration has been described in which the voltage phase shifter 100 is rotatably formed, the voltage phase shifter 100 is not limited to the above configuration, and may be formed by various means shown below. It can be selected and implemented arbitrarily.

First, as one of the voltage phase shifting devices 100, as shown in FIG.
Winding wires 92A formed in arbitrary plural kinds of pole numbers for each of
928.93A.

93B and windings 92A, 92B, 93A.

A plurality of pole number changeover switches 81 to 3 are provided in each of 93B.
20, and the voltage phase shifting device 100 is formed by the pole number changeover switches 81 to 820 and connected to a power source. The appropriate number of poles selection switch corresponds to the start-up operation and specified speed required for the load connected to the rotor shaft of the motor.
・For applications requiring a wide range of speed changes for the load connected to the rotor shaft, windings 92A, 92B, and 93A are wound around the stator 90°91.

93B may be wound with a winding wire having an arbitrary number of poles.

In contrast to the above-mentioned embodiment in which the speed is changed by rotating the rotary stator 31, this method allows rapid speed change control to a speed close to the desired synchronous speed, and also allows the load to be Although it has the advantage of being able to generate large torque from low to high speeds in response to the speed changes that are made, it also has the disadvantage of not being able to change speed steplessly.

In addition, FIG. 11 shows windings 92A, 92B, 93A, 93
The relationship between slip and torque is shown when the number of poles of B is changed to 4 poles or 8 poles using the appropriate pole number conversion switch... and the windings 92A and 92B and the windings 93A and 93B are connected in series. This is a graph showing the effect of connecting the windings 92A and 92B and the windings 93A and 93B in series, and the effect of switching the number of poles to a nearby synchronous speed to achieve the desired speed change control for the rotor shaft. Due to the synergistic effect of the It has a remarkable effect.

Next, other means of the voltage phase shifter will be explained based on FIG. 12. Winding 9 wound around stator 94.95
6.9 and 7 are connected in series or in parallel to a power source via a plurality of phase changeover switches N1 to N19 to form a voltage phase shifter 100. In this means, the phase changeover switches N1 to N19 are appropriately switched to change the phase input from the power supply to the windings 96,97, thereby changing the rotational speed of the rotor shaft. However, in this case, since the phase is changed only by appropriately operating the phase changeover switches N1 to N19, the speed change range of the rotor shaft is designed to increase the gap in stages. be. However, if this voltage phase shifter is used together with the pole number changeover switches 81 to S20 attached to the windings 92A, 92B, 93A, and 93B wound with a plurality of pole numbers, With respect to the rotational speed change of the load, it is possible to perform right-stage speed change control over a small range of the rotational speed to change the rotor shaft to a speed close to the synchronous speed.

Next, other means of the voltage phase shifting device will be explained with reference to FIG. The output side of the winding 112 wound around the stator 110 is connected to a power source, and the output side of the winding 112 is connected to a single-phase transformer 115.
The voltage phase shifting device 100 is formed by a plurality of connection changeover switches P1 to P4. The winding 112 and the winding 113 are connected in series. From now on, the winding 112
and the winding 113 are connected to the single-phase transformer 115 via the connection changeover switches P2 and P4, or the connection changeover switches P1 and P3 are individually switched, and the winding 1
By advancing or retarding the phase of the voltage input to the winding 113 with respect to the phase of the voltage input to the winding 12, the rotational speed of the rotor shaft can be changed. Although this method is also capable of controlling the speed change of the rotor shaft 4 only in stages, it has the advantage of being able to control the speed change instantaneously.

Next, yet another embodiment of the voltage phase shifter will be described with reference to FIG. 14. The voltage phase shifter 100 of this embodiment is as follows:
It has a stator 105 fixed to a frame body and a rotor 106 rotatably pivoted inside the stator 105. The stator 105 has a primary winding 107, and the rotor 106 has a secondary winding. 108 is formed by a three-phase induction voltage regulator 109.

Terminals A, B, and C of the winding 112 of the stator 110 are connected to a commercial three-phase power source A, B, and C. 3 phase induction voltage regulator 10
Terminals A and B of the primary winding of 9.

C are terminals a and b of the winding 112 of the stator 110.

C, and the terminals a, b, of the secondary winding 108
connected to c. Terminals A, B, and C of the secondary winding 108 are connected to terminals A, B, and C of the winding 113 of the stator 111. That is, the windings 112 and 113 have the voltage phase shifter 10 in between.
They are connected in series through a three-phase inductive voltage regulator 109 with zero.

In this embodiment, by rotating the rotor 106 of the three-phase induction voltage regulator 109 provided with the secondary winding 108 by an arbitrary amount, the windings 112, 113 of the stator 110° 111
The phase of the voltage input to the rotor shaft 4 can be shifted, and the rotation speed of the rotor shaft 4 can be controlled according to the required rotation speed.

Next, based on FIG. 15, the rotating stator 31. Second stator 25
The method of connecting the windings wound on the winding will be explained. The terminals U, V, and W of the winding 22 wound around the rotary stator 31 can be shorted to each other via a switch M1, and the terminals X, Y, and Z can be shorted to each other by a switch M6. Further, the terminals U, V, and W of the winding 22 can be connected to the terminals Z, X, and Y via a switch M2. On the other hand, the second stator 2
Terminals U, V, and W of winding 23 wound around switch M9
, and the terminals x, y, z are connected to a commercial three-phase power supply via switch M3. Terminals U, V, W of winding 23
can be mutually short-circuited by a short-circuit switch M7. Also, the terminals U and V of the winding 23.

W and terminals z, x, and y can be connected to each other via a switch M4. And the terminals R and V of the winding 22
,W,! :Terminals X and Y of S line 23.

Z via switch M8, and between terminals X, Y, Z of winding 22 and terminals U, V of winding 23.

By connecting W through the switch MIl, the windings 22 and 23 can be connected in series with each other.

The operation of the above configuration will be explained below based on FIGS. 1 and 15.

Rotating stator 31. The connections between the windings 22 and 23 of the second stator 25 are made delta connections by turning on switches Ml, M3 and Mi and opening the other switches.
2. When power is supplied from a commercial three-phase power supply to 23, winding 2
There is no phase shift in the voltage input to 2.23, it has the same torque characteristics as a general induction motor, and the rotational speed of the rotor shaft 4 is the maximum rotational speed.

By operating the small motor 35 to rotate the rotary stator 31, the rotation speed can be continuously controlled. When the phase difference between the voltages between both stators 31.25 reaches 180°, the rotational speed decreases to a certain limit. Phase angle θ = 0° when windings 22 and 23 are delta connected
The relationship between slip and torque from θ=180° is as shown in FIG. 16, and within the range of slip 81 to S2, the rotational speed of rotor shaft 4 can be controlled arbitrarily. However, in the above state, in the range of slip S from 5=S2 to S=1.0, the 16th
Speed control in the area indicated by hatching in the figure becomes impossible.

To deal with the above phenomenon, switches Me, M8 and M9
At the same time as turning on the other switches, the winding 22.2
Switch the connection in step 3 to star connection, and in this state,
Magnetic flux φ1', φ2 of the rotating magnetic field created by both stators 31 and 25
′ becomes the same phase. Moreover, the windings 22 of both stators 31.25
Since each of the windings 22.
The voltage applied to 23 is 1/f3 of the delta connection. Therefore, the voltage induced in the conductor 5 of the rotor 8 by the magnetic fluxes φ1' and φ2' is also 1/f3, and the rotor 8
Since the torque of is proportional to the square of the voltage, the torque is 1/3.

Therefore, by switching the connection of the windings 22.23 of the rotary stator 31.25 to star connection using a switch, the torque characteristic becomes θ=180° S as shown in FIG.
The torque when = 1.0 is T1/3, and θ = 0
° When S=1.0, the trick is T2/3, and the speed uncontrollable region shown by hatching becomes considerably small.

Next, a description will be given based on a side view of the main parts shown in FIG. 18 and a cutaway view of FIG. 19.

A plurality of resistive materials r... are short-circuited to a plurality of conductors 5... communicating between the rotor cores 2 and 3, and the plurality of resistive materials r... are made of, for example, highly heat resistant, Insulating ceramics (including pottery, new ceramics, etc.), stainless steel, resin, and rubber.

A core 84 for resistive material is surrounded by glass, asbestos, aluminum with an insulating coating, and other non-magnetic materials.
The resistive material core 84 may be provided with a frontage window 84A as shown by the dotted line in the right half, and the resistive material core 84 is mounted on the rotor shaft 4.

With the above configuration, even if heat is generated in the conductor 5... or the resistance material r... while the plurality of conductors 5... or the plurality of resistance materials r... are being energized, the resistance material r... ...
is not deformed by the resistance material core 84, and the resistance material core 8
Since 4 is insulating, it does not induce magnetism, and it is possible to prevent a decrease in torque due to leakage reactance. Also,
Since the resistive material r... is surrounded by the resistive material core 84, the resistive material r... is prevented from being oxidized due to heat generation.
・It is possible to improve the durability of. In addition, the ventilation cylinder 67
The ventilation effect of the blower device 73 introduced into the conductor 5...
- Cooling and heat dissipation of the resistive material r... is effectively promoted by the rotation of the resistive material core 84A. In addition, core 8 for resistance material
4 can be divided into an arbitrary number of parts and mounted on the rotor shaft 4.

Next, the conductor core surrounded by the conductor 5 will be explained based on the side view of the main part shown in FIG. 20 and the cutaway view of FIG. 21.

A plurality of conductors 5... communicated between the rotor cores 2 and 3, and a plurality of resistance materials r... connected to the conductors 5 by short circuit.
Each of the conductor cores 85 is surrounded by any heat-resistant and insulating non-magnetic material. On the outer peripheral surface of the conductor core 85, there are a plurality of blade bodies 8 serving as cooling bodies.
5A... is provided, and the conductor core 85 is connected to a plurality of arms 8.
5B... is attached to the rotor shaft 4, and the arm 85B...
... is formed in the opening window 85G. In this embodiment, the deformation of the conductor 5 during operation can be prevented from damaging the windings 22, 23 by the conductor core 85, and the corpus 85A, which rotates with the rotation of the rotor shaft 4, The conductor 5 comes into contact with the air introduced into the ventilation 11167.
・It is effective to obtain the effect of the cooling heat dissipation effect of the resistance material r... and to prevent torque reduction due to leakage reactance.

Next, still another embodiment of the conductor core will be described based on the side view of the main parts shown in FIG. 22 and the cutaway view shown in FIG. 23.

The conductor cores 86A, 86B made of an insulating heat-resistant material or any non-magnetic material are surrounded by a plurality of conductors 5..., and the conductor cores 86A, 86B face the rotor core 2.3. The conductor cores 86A, 8 are integrally attached to both sides.
6B is equipped with a plurality of yellow pieces 86G which serve as cooling bodies.

In this embodiment, the operation is similar to that of the previous embodiment, so the details thereof will be omitted.

What is shown in FIG. 24 is an embodiment diagram in which conductors 5... are formed in a rotor core, and the shallow parts of a plurality of conductors 5... or a plurality of resistance materials r... The rotor core 87 is surrounded by any insulating heat-resistant material or non-magnetic material, and the open conductors 5 and the resistive material r are coated with an insulating coating. is applied. This embodiment is characterized in that the heat dissipation effect of the conductors 5 . . . and the resistive material r . . . is high due to the rotation action of the rotor core 87.

What is shown in FIG. 25 shows that each of the plurality of conductors 5 installed in each of the rotor cores 2 and 3 and the rotor in the space between the rotor cores 2 and 3 or in the non-magnetic core part. This is an embodiment in which a high resistance ring 116 fitted into the shaft 4 is short-circuited by a resistance material r serving as a connecting member. Resistance material r...
Even if . is not connected to all of the conductors 5..., it is possible to obtain the appropriate effect.

Next, a second embodiment of the rotational position detector will be described with reference to FIG. 26.

An elongated detection plate 46 is fixed to the outer peripheral surface of the rotary stator 31, and a plurality of limit switches 47.
47a .
8, and limit switches 47a...47
n is connected to a display 49 which calculates the change in the electrical resistance value inputted with the same output signal and displays the rotational position of the rotational stator 31 in electrical angles.

With the above configuration, when the rotating stator 31 is stationary, the rotating position of the rotating stator 31 is displayed on the display 49 based on the corresponding resistance value of the limit switch 47 that is in contact with the detection plate 46. . For example, when only the limit switch 47a comes into contact with the detection plate 46, the rotating position of the rotating stator 31 is displayed as 0° in electrical angle on the display 49, and the following limit switches 47b, 47c, 7d, 47e, etc. ... is 15", 30", 45°, 60° in electrical angle.
It will be displayed like this. In addition, the limit switch 47
. . can be installed in any number, and it goes without saying that various detection plates 44 can be used. The configuration and operation other than those described above are the same as those of the first embodiment, so details thereof will be omitted.

Next, a third embodiment of the rotational position detector will be described with reference to FIG. 27.

A disk 50 is attached to the side wall surface of the rotating stator 31, and the disk 50
A plurality of detection holes 51 with different diameters are drilled in the frame 14, and a photo sensor 53 is attached to a bracket 52 screwed to the inner circumference of the machine frame 14, and integrated with the rotary stator 31. A rotation position detector 54 is formed with a photo sensor 53 facing in relation to the detection hole 51 which rotates, and the photo sensor 53 is connected to a display 55 provided with a calculation function. .

The operation of the above configuration will be explained below.

At the rest position of the rotating stator 31, the photosensor 53
detects the corresponding detection hole 51, the photo sensor 53
The detection signal is calculated on the display 55, and the rotational position of the rotational stator 31, that is, the electrical angle, is displayed.

If the rotational position of the rotational stator 31 at the start of operation is assumed to be 120 degrees in electrical angle, the rotational stator 31 is rotated so that the photosensor 53 detects the detection hole 51j and the display 55 indicates When 120° is displayed, the start switch is activated, and the rotary stator 31 is then rotated to control the desired normal rotation speed. The configuration and operation other than those described above are the same as those of the first embodiment, so the details thereof will be omitted.

Next, a fourth embodiment of the rotational position detection device will be described with reference to FIG. 28.

An opening 56 is formed in the lower part of the machine frame 14, and the first stator 24
A worm gear 57 is fixedly attached to one side of the rotary stator 58.
to be formed. A rotating shaft 61 fitted with a worm 60 is attached to a pulse motor 59 mounted on the outer periphery of the machine frame 14, and the worm 60 is screwed onto a worm gear 57 to form a drive device 64. A rotary encoder 62 whose rotating shaft is connected to the rotating shaft 61 is connected to a display 63.
The rotary position detection path 65 is provided with a memory circuit, an arithmetic circuit, and a digital display section.

The effects of the above configuration will be explained below. Display device 63 into which the output signal of rotary encoder 62 is input
, the time when the rotational position of the rotational stator 58 is Oo in electrical angle is memorized, and the pulse motor 59 is sequentially rotated until the rotational position of the rotational stator 58 reaches 180° in electrical angle. The rotational position of the rotary stator 58 is calculated into an electrical angle based on the pulse signal detected by the rotary encoder 62 during rotation, and the pulse signal of the rotary encoder 62 and the electrical angle of the rotational position of the rotary stator 58 are calculated. The relationship is memorized.

Therefore, when the output value of the rotary encoder 62 is input to the display 63 at the time of starting operation, the calculated value is output to the digital display section to display the rotation position of the rotation stator 58 in electrical angles, and then The pulse motor 59 is operated so that the starting rotation speed corresponds to the starting characteristics of the load on the rotor shaft, the rotary encoder 62 detects the rotation angle of the pulse motor 59, and the output signal is displayed on the display 63.
Check the sequential changes in the electrical angle displayed on the digital display, and when the desired electrical angle is displayed, stop the operation of the pulse motor 590, activate the start switch, and start the pulse motor again. 59 is reversed from the front, and the load connected to the rotor shaft 4 is controlled to have a desired rotation speed.

This embodiment differs from the first embodiment in that the rotary stator 58 and pulse motor 59 are connected to a worm gear 57. Since the rotary stator 58 is connected to the worm 60, the rotary stator 58 can be fixed when the rotary stator 58 stops rotating without installing a separate device.
The rotational position detector 65 of 8 is the rotary encoder 6
2 or the like, the rotational position of the rotational stator 58 can be detected and displayed in a stepless manner, and starting control can be performed extremely smoothly. The rotational position detector is not limited to the above-mentioned embodiment, and for example, a proximity switch, a beam sensor, an ultrasonic sensor, a photoelectric sensor, etc. can be arbitrarily selected, and the rotational position detector is directly or indirectly connected to the rotational stator 31. It can be installed and adopted.

In addition, in the embodiments of each of the rotational position detection devices described above, only the case where the rotational stator 31 is rotatable and formed into a voltage phase shifting device has been described, but both the rotational stator 31 and the second stator 25 may be configured to be rotatable. (In this case, the rotation range of both stators 31.25 may be reduced to reach the electrical angle of 0° described above.)
The rotating stator 31 can be controlled by a small motor or a pulse motor as a drive device.
The present invention is not limited to the above, and various types of rotation mechanisms such as air cylinders, hydraulic cylinders, electromagnets, etc. can be used.

Next, an embodiment of automatic control of a variable speed induction motor will be described with reference to a block diagram shown in FIG.

(See FIGS. 1 and 2) Input/output control circuit 76, control circuit 77, arithmetic circuit 78. A speed detector 44 such as a tacho generator equipped with a speed indicator 45 attached to the rotor shaft 4 and a circuit for detecting the rotational position of the rotation stator 31 are installed on the input side of the control device 75 consisting of a memory circuit 79 and the like. Moving position detector 42
A small motor 35 is connected to the output side of the tI control device 75 by connecting a temperature detector 80 attached to a proper position of the ventilation 11I67, a start switch 82 and a keyboard 81 with a display. The motor 72 and solenoid 38 of a blower device 73 for cooling and dissipating heat from the conductors 5 . . . , the resistive material r . is entered. That is, the rotation m of the rotary stator 31 corresponding to a phase angle of 0° to 180° and the rotation angle of the rotary stator 31 (0° to 180° in electrical angle)
0°), the speed control tII value that controls the rotation speed of the motor 72 with respect to the rotation angle of the rotation stator 31, and the relationship between the Several kinds of starting setting values that match the starting characteristics of the connected loads and a reference temperature setting value that controls the motor 72 to increase or decrease with respect to the temperature detected by the temperature detector 80 are input.

When the operation preparation key is input from the keyboard 81 at the start of operation, the rotation position detector 42 detects the current rotation position of the rotation stator 31 and displays it on the display, and the load connected to the rotor shaft 4 is detected. When an arbitrary startup setting value that matches the startup characteristics of the controller 75 is input from the keyboard 81, the
Solenoid 3 receives a signal output from memory circuit 79 of
8 to unlock the gear 33 fitted to the rotary stator 31, and also activate the small motor 35 to rotate the rotary stator 31. When the desired starting rotation position is reached, the small motor 35 automatically stops.

When Ready for Rotation is displayed on the display, the speed control value of the rotor shaft 4 is input into the control device 75 from the keyboard 81. is calculated. When the start switch 82 is activated and an input signal is communicated to the control device 75, the control device 7
5, the small motor 35 is operated to control the speed of the rotor shaft 4, and the speed value detected by the speed detector 44 attached to the rotor shaft 4 is compared with the speed control value. If there is a difference in the speed, the control device 75 outputs an output to the small motor 35 to correct the rotation speed i! Il
- to do.

In addition, as another method of controlling the speed change 1tlJ during operation, the desired speed change value can be input from the keyboard 81 to the control I device 75.
, the input speed control value of the rotor shaft 4 is set to be slower than the current speed control value with respect to the current rotational position of the rotating stator 31 stored in the storage circuit 79. Based on the calculated value, the small motor 35 of the drive device 29 is operated to rotate in the forward direction or in the reverse direction, and the rotary stator 31 is rotated. The speed change value detected by the speed detector 44 and input to the W control device 75 is detected by the control device 75.
When the desired speed change value is reached, the operation of the small motor 35 is stopped by an output signal from the control device 75.
It has the advantage of being able to accurately control the speed change rotation speed of the motor.

Rotation spread is 0° with respect to the rotation amount calculation value of rotation stator 31
Since the rotational speed of the motor 72 during rotation within the range of ~180° is set in the memory circuit 79 so that it changes from low rotation to high rotation, the rotor is controlled by the speed control value output from the control circuit 77. When the shaft 4 is controlled to rotate at a high speed, the motor 72 is controlled to rotate at a low speed, and when the rotor shaft 4 is controlled to rotate at a low speed, the motor 72 is controlled to rotate at a high speed.

When the temperature detection value of the temperature detector 80 communicated with the control device 75 becomes higher than the reference setting value set in the memory circuit 79, the rotational speed of the motor 72 is corrected by the signal output from the control III device 75. Then, the ventilation effect inside the ventilation cylinder 67 is increased, and the non-magnetic core 9..., the resistance material r...
The function of cooling and dissipating heat is restored to normal. In addition, an output signal from the control device is sent so that the detected value of the temperature detector 80 becomes the reference temperature setting value, regardless of the speed control value that controls the motor 35 that rotates the rotary stator 31 to rotate in forward or reverse directions. In some cases, the rotational speed of the motor 72 of the blower device 73 is controlled to increase or decrease, or to be turned ON or OFF. During the above operation, if a new rotational speed value is input from the keyboard 81 or a speed control value is automatically input directly from the control panel connected to the load to the control device 75 via the keyboard 81, the rotation is fixed. Based on the current position of the rotary stator 31 communicated from the rotary position detector 42 that detects the rotary position of the child 31, the small motor 35 is operated to a desired speed value to set the target of the rotor shaft 4. Shift control to rotational speed.

Note that as the rotational position detection device connected to the control device 75, one of the rotational position detection devices 48, 54, 65 may be adopted and connected in place of the rotational position detection device 42;
It is possible to replace the small motor 35 that rotates the rotating stator 31 with a pulse motor 59, or with various rotating mechanisms such as an air cylinder, hydraulic cylinder, electromagnet, etc., or as a voltage phase shifter, see FIG. , any of the devices shown in FIGS. 10 and 12 to 15 can be selected and employed as appropriate, and various refrigerant devices 104 can be selected and connected in place of the blower device 73 provided with the motor 72. Sometimes.

Furthermore, the variable speed induction motor of the present application can also be used as an induction generator, and if the rotor shaft 4 is directly connected to a turbine, gas turbine, solar power generator, etc. to generate electricity, an expensive governor will be required. can also be omitted. In addition, when an internal combustion engine is connected as a prime mover, it can correspond to the rotational speed that achieves the minimum fuel consumption of the internal combustion engine, and even when the power from feng shui as an energy source is weak and unstable, the rotational speed can produce its maximum output. In hydroelectric power generation, power can be generated efficiently according to the flow velocity, and complicated and expensive variable pitch devices or phase adjusters can be omitted. Furthermore, synchronization with external power can be performed without an expensive synchronization device. In addition, a switch is provided to connect the rotor shaft to the rotor shaft and to switch the two phases on the input side of the stator winding.
If the rotor shaft can be rotated forward or reverse by the switch,
By operating the switch and the voltage phase device, it can also be used as an electric brake, and by controlling the rotation speed with the voltage phase device, the braking force of the rotating shaft connected to the rotor shaft can be efficiently adjusted.

What is shown in FIG. 22 is a case in which each of the plurality of conductors 5 installed in each of the rotor cores 2 and 3 rotates in the space between the rotor cores 2 and 3 or in the 9 parts of the non-magnetic core. This is an embodiment in which a high resistance ring 116 fitted into the child shaft 4 is short-circuited by a resistance material r serving as a connecting member. Resistance material r・
. . . can obtain the appropriate effect even if they are not connected to all of the conductors 5 .

In addition, the cooling body 13 is attached to the non-magnetic core 9 by the cooling blade vehicle body 13.
A, directly attaching the cooling blade vehicle body 13A to the rotor shaft 4, and forming a non-magnetic core 9 by surrounding the conductor r with a heat-resistant material such as asbestos or ceramic material. Sometimes I do.

〔Effect of the invention〕

As explained above, according to the present invention, a plurality of conductors are installed in each of a plurality of rotor cores, and one conductor is connected to a resistive material between the plurality of rotor cores. In the electric motor, the plurality of conductors between the plurality of rotor cores are short-circuited by a plurality of rotor cores, and a voltage phase shifting device is provided in association with at least one stator among the plurality of stators. Or one or both of the above-mentioned resistive materials is surrounded entirely or partially by a heat-resistant material or a non-magnetic material, so that a plurality of conductors or a plurality of resistors are connected between a plurality of rotor cores. One or both of the materials is surrounded entirely or partially by a heat-resistant material or a non-magnetic material, which prevents a decrease in torque due to leakage reactance and prevents deformation of the conductor or resistance material due to heat generation. This is extremely effective in preventing damage to the stator windings due to contact, and in improving durability by preventing oxidation caused by heat generation of conductors or resistive materials.

[Brief explanation of the drawing]

1 to 22 are illustrations of embodiments of the present application. Fig. 1 is a side sectional view of the induction motor, Fig. 2 is a side view showing the rotation mechanism of the rotating stator and the blower, and Fig. 3 is a side view showing the rotation mechanism of the rotating stator and the air blower. Figure 4 is a diagram showing the relationship between rotor slip and active power, Figure 5 is an electrical equivalent circuit diagram of the rotor, Figure 6 is an electrical equivalent circuit diagram seen from the stator side, Figure 7 is a diagram showing the relationship between speed and torque when a plurality of conductors are short-circuited using resistive materials and the windings wound around the stator are connected in series, and Figure 8 is a diagram showing the relationship between the windings of the stator. A diagram showing the relationship between speed and slip when each is connected to a power source in parallel, Figure 9 is a side view of the radiator connected to the ventilation cylinder, and Figures 18 and 10 are diagrams showing the relationship between the speed and slip when the radiator is connected to the power supply in parallel. Connection diagram with windings to be formed, No. 11
The figure shows the relationship between speed and torque characteristics in 4-pole and 8-pole systems, Figure 12 is a configuration diagram of a voltage phase shift device in which a phase shift selector switch is connected to the stator winding, and Figure 13 is a voltage An embodiment diagram in which the phase shift device is formed by a single-phase transformer and a phase shift changeover switch, FIG. 14 is an embodiment diagram in which the voltage phase shift device is an induction voltage regulator, and FIG. Connection explanatory diagram for switching to connection or star connection, Figures 16 and 17 are relationship diagrams between speed and torque characteristics, Figures 18 and 1
FIG. 9 shows an example of a core for resistance material, and FIG. 20 shows an example of the core for resistive material. FIG. 21 is an example diagram of a conductor core, and FIG. 22 is a diagram showing an example of a core for a conductor. Figure 23 is another example of a conductor core, Figure 24 is an example in which multiple conductors are formed into a rotor core, and Figure 25 is a diagram in which a resistive material is connected between multiple conductors. 26 is a sectional view showing a second embodiment in which the rotation position detector is formed by a limit switch, and FIG. 27 is a partially cutaway side detector showing the rotation mechanism of the rotation stator. FIG. 28 shows a fourth embodiment in which the rotational position detector is formed by a rotary encoder with memory and calculation functions, and FIG. 29 shows a button showing the configuration of automatic control. ...Induction motor 2, 3...Rotor core 4...Rotor shaft 5...Conductor 6.
7... Short circuit ring 8,8A~8C... Rotor 9.
...Non-magnetic core 10.11...Side part 12...
Ventilation body 13... Cooling body 13A... Cooling wing body 14... Machine frame 15.16... Bearing board
17...Connecting rod 18...Nut 19.
20... Cooling impeller 21... Bearing 22
．． 23...Winding 25...Second stator 26...
- Sliding shaft 27... Fixed ring 28... Stop ring 29... Drive device 30... Rotating mechanism 31... Rotating stator 32... Magnetic sensor 33... Gear 34.34a ~340... Magnetic sensing body 35... Small motor 36... Drive gear 37... Opening
38...Solenoid 39...Exhaust hole
40... Ventilation hole 41... Non-magnetic plate 42
...Rotation position detector 43...Display device 44
...Speed detector 45...Speed indicator 46...
・Detection plate 47.47a to 47n...Limit switch 48...Rotation position detector 49...Indicator 50...
・Circle 11 51.51a-51n...Detection hole 52
...Bracket 53...Photo sensor 54.
... Rotation position detection 55 ... Display 56 ... Opening 57 ... Worm gear 58 ... Rotation stator 59 ... Pulse motor 60 ... Worm 61 ... Rotation shaft 62... Rotary encoder 63... Display device 64... Drive device 65.
...Rotation position detector 66...Space 67...Blower cylinder 68...Blower port 69...Blower outlet
70...Blower cylinder 71...Windmill 72
...Motor 73...Blower device 74A...
- Air intake port 74B...Exhaust port 75...Control device 76...Input/output circuit 77...Control circuit 7
8... Arithmetic circuit 79... Memory circuit 80...
・Temperature detector 81...Keyboard 82...Start switch 84...Resistance material core 84A...Opening window 85...Conductor core 85A...Wing body
85B...Arm 85C...Opening window 8
6A, 86B... Conductor core 86C... Wing piece
87... Rotor core 90.91... Stator 92A, 928.93A, 93B... Winding 94.95
... Stator 96.97 ... Winding 100 ... Voltage phase shifter 101 ... Water tank 102 ... Pump
103...Radiator 104...Refrigerant device
105...Stator 106...Rotor 1
07...Primary winding 108...Secondary winding 109...
・3-phase induction voltage regulator 110.111...Stator 1
12.113...Winding 114...Single-phase transformer 1
15...Single-phase transformer 116...High resistance ring r...Resistance material S1-320...Pole number changeover switch N1-N19...Phase shift changeover switch P1-P4...Connection changeover switch M1~M10...Switch

Claims (7)

[Claims] (1) A plurality of conductors installed in each of a plurality of rotor cores fixed to a rotating shaft at arbitrary intervals are connected to form an integral rotor, and the plurality of conductors are connected to each other to form an integral rotor. The plurality of conductors are short-circuited and connected between the rotor cores using a resistive material, and a plurality of stators are arranged in parallel and facing each other concentrically with the plurality of rotor cores and on the outer periphery of the rotor cores. In the electric motor, the plurality of conductors between the plurality of stator cores or the resistance 1. A variable speed induction motor characterized in that one or both of the materials are entirely or partially surrounded by a heat-resistant material or a non-magnetic material. (2) Claim No. 1, wherein the plurality of conductors or the plurality of resistive materials are entirely or partly surrounded by the non-magnetic material to form a conductor core or a protective core for the resistive material. Variable speed induction motor as described in section. (3) The variable speed induction motor according to claim (1), wherein a peripheral surface of one or both of the plurality of conductors and the plurality of resistance materials is subjected to an insulation treatment. (4) The variable speed induction motor according to claim (2), wherein a cooling member is attached to one or both of the conductor core and the resistor protection core. (5) The variable speed induction according to any one of claims (1), (2), and (4), wherein the non-magnetic material is an insulating material or an insulating material. Electric motor. (6) The variable speed induction motor according to claim (1), wherein the heat-resistant material is an insulating material or is insulated. (7) The variable speed induction motor according to claim (1) or (2), wherein the heat-resistant material is made of a ceramic material.