JP2688482B2 - Hybrid type parametric motor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hybrid parametric motor that can be used as a power converter in a constant voltage circuit, a multiplier, or the like. [Prior Art] Conventionally, a static device has been generally used as a power converter in a constant voltage circuit or a multiplier, but recently, a magnetic circuit and an electric motor can be integrated in place of the conventional static device. Research and development of a rotor-type machine has been promoted. As a device of this type, two U-shaped magnetic cores are first placed orthogonally to each other and half-mounted, and a single-phase squirrel-cage rotor is placed in the center. We proposed a built-in converter, which made it possible to replace the static equipment used in the conventional constant voltage circuits and multipliers with rotor equipment. [Problems to be Solved by the Invention] In the conventional device as described above, there is a gap between the magnetic poles that requires rotation in any case, and the magnetic resistance in this portion becomes extremely large. For this reason, the magnetic flux does not pass through this portion so much and passes through a magnetic path that easily passes, that is, a magnetic path of an outer frame having a small magnetic resistance without a gap, resulting in a problem that the rotating magnetic field is weak. Therefore, the present invention provides a hybrid parametric motor that solves the problems of the conventional device and allows a magnetic flux to directly pass between the magnetic poles to obtain a strong rotating magnetic field, and has the characteristics of a parametric circuit. Is intended. [Means for Solving the Problems] In order to achieve the above object, the hybrid parametric motor according to the present invention is fixed to I-shaped iron cores which are orthogonal to each other on a plane and to outer ends of these I-shaped iron cores. A primary coil having an outer iron core forming a closed magnetic circuit together with the I-shaped iron core and a plurality of windings wound around the outer iron core and connected in series with each other, and having an input power source connected between both terminals. And a secondary winding comprising a plurality of windings wound around each magnetic path formed by the I-shaped iron core and the outer iron core and connected in series with each other, and having a resonance capacitor connected in parallel between both terminals. An independent magnetic path having a side coil and a rotor inserted in a hole formed in a central portion of the orthogonal portion of the I-shaped iron core, and main magnetic fluxes due to magnetomotive forces of the primary side coil and the secondary side coil are orthogonal to each other. To form It is characterized by being configured as follows. Preferably, a variable resistor for adjusting the magnetic resistance of the magnetic path may be connected in parallel to the resonance capacitor connected in parallel to the secondary coil so that the rotation speed of the rotor can be controlled. [Operation] In the device according to the present invention, since the orthogonal magnetic core structure is adopted, the magnetic flux can directly pass between the magnetic poles, and a strong rotating magnetic field can be obtained. When the input power supply voltage connected to the primary coil is gradually increased, parametric oscillation occurs at a certain point, and an output voltage having a phase difference of 90 ° is obtained between the secondary coil terminals. The rotating magnetic field generated by this causes the rotor provided between the magnetic poles to rotate with high torque. When a variable resistor is connected in parallel to the resonance capacitor connected in parallel to the secondary coil, the magnetic resistance of the magnetic path changes by adjusting this variable resistor appropriately. The rotation speed can be controlled. Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 schematically show the structure of a hybrid type parametric motor according to an embodiment of the present invention. In these drawings, 1 and 2 are I-shaped iron cores, which are arranged orthogonal to each other on a plane. , Are rigidly fixed to each other as described below. The outer core 3 is fixed to surround the outer ends of the respective I-shaped cores 1 and 2 to form a plurality of magnetic paths. A squirrel cage rotor 5 is incorporated in a hole 4 formed in the central portion of the I-shaped iron cores 1 and 2 in the orthogonal portion. As shown in FIG. 2, the squirrel cage rotor 5 has an I-shaped iron core. Two brackets 6 and 7 are respectively applied to the upper surface and the lower surface of 1 and 2, and the brackets 6 and 7 are tightened to each other by bolts 8 in the hole 4,
7 fixed. As shown in FIG. 1, each magnetic path is provided with three windings N1a, N1b, N1c forming a primary coil and four windings N2a, N2b, N2c, N2d forming a secondary coil, Although omitted in FIG. 1, three windings N1a, N1b of the primary coil,
N1c are connected in series with each other, ie, as can be seen from FIG. 3 which shows the equivalent circuit of the motor of FIGS. 1 and 2, the terminal 1a ′ of winding N1a is connected to the terminal 1b of winding N1b,
Terminal 1b 'of winding N1b is connected to terminal 1c of winding N1c,
A single-phase input power supply 9 is connected between the terminal 1a of N1a and the terminal 1c 'of the winding N1c. Similarly for the secondary winding, terminal 2a 'of winding N2a is connected to terminal 2b of winding N2b, terminal 2b' of this winding N2b is connected to terminal 2d 'of winding N2d, Terminal 2d of N2d is connected to terminal 2c 'of winding N2c,
A resonance capacitor 10 is connected between terminals 2a and 2c of a and N2c. In FIG. 3, the circuit portion I is a parametric circuit, and the portion II is an equivalent circuit of the induction machine portion. FIG. 4 shows a parallel resonant circuit in which an iron core reactor L and a capacitor C are connected in parallel. The characteristic of this circuit is that the current Io (combined current Ic + IL) that flows into the circuit with respect to the applied voltage Vi.
Is that the magnitude and phase of the changes. That is, the fifth
As shown in the figure, the advance current Ic flowing through C is proportional to Vi, but the delay current IL flowing through L hardly flows in the range where Vi is small, and when Vi becomes larger than Vm, it rapidly increases due to iron core saturation. As a result, the circuit current Io is Vi in the small range of voltage Vi.
The current increases in proportion to, and decreases when Vi becomes larger than Vm, which shows a so-called negative characteristic. Next, when Vi becomes Vo, the magnitudes of the advance current Ic and the delay current IL become equal and the circuit current Io
Becomes zero, and when Vi becomes larger than Vo, it becomes a delayed current in the future, and when the voltage Vi increases, the current Io sharply increases. That is, when Ic = IL, the parallel resonance voltage Vo is established, and at this time, Vo has a phase difference of 90 ° with respect to Vi.
Vo is especially called a parallel resonance voltage. Therefore, when the voltage of the input power supply 9 connected to the primary side coil is gradually increased in the device configured as shown in FIG. 1, FIG. 2 and FIG. Oscillation occurs and an output voltage having a phase difference of 90 ° is obtained in the secondary coil. On the other hand, the main magnetic flux φi due to the magnetomotive force of the primary coil and the main magnetic flux φo due to the magnetomotive force of the secondary coil form an independent magnetic path and are orthogonal to each other on a common plane. The voltage waveform at this time is a two-phase alternating current as shown in FIG. As for the AC waveform, the current iB flowing through the secondary coil has a phase difference of 90 ° with respect to the current iA flowing through the primary coil, so that the relationship between the time and the current of the two-phase AC is shown in FIG. Consider a fixed coil and a rotating magnetic field based on this waveform. Here, when the current is positive (+), it is assumed that the current flows from the coil sides A and B to A ′ and B to A ′ and B ′, respectively.
A magnetic field proportional to the magnitude of current is created in the direction according to the right-handed screw law. Since iA is positive and iB is zero at the instant of time t1, the direction of the magnetic field is upward as shown in FIG. 7 (a) according to the right-handed screw law. Next, at t2, iA
Is in the positive direction, and iB is also in the positive direction, so it rotates 45 degrees to the right from t1 (see FIG. 7 (b)). For t3, iA is zero, iB
Is a positive direction, the magnetic field is 90 ° to the right) (see FIG. 7 (c)). Similarly, for t4, iA is negative and iB is positive and 135
When the angle is L5, iA is negative and iB is zero, which is downward (see FIGS. 7 (d) and 7 (e)). In this way, it is a well known fact that the rotating magnetic fields of (a) to (e) of FIG. 7 are generated between each magnetic pole and the rotor. In this way, since a two-phase AC rotating magnetic field is generated between the primary side and secondary side magnetic poles and the rotor, the stator does not need any slots or shading coils, so the structure is simple and Rotation with high startability can be obtained. Therefore, in the device shown in FIGS. 1, 2, and 3, each magnetic pole is generated by the rotating magnetic field generated by the output voltage obtained by the secondary coil. The rotor 5 provided therebetween is rotated with high torque. In the illustrated apparatus, the I-shaped iron cores 1 and 2 are made of silicon steel plate, each winding is made of formal wire, the three windings on the primary side are 300 times each, and the four windings on the secondary side are four. Each winding has 250 turns. FIG. 8 shows the relationship between the output voltage Vo and the rotation speed N with respect to the input voltage Vi. Set the capacity of the resonance capacitor 10 connected to the secondary side to 24
When it is set to μF and the input voltage Vi from the input power supply 9 is gradually increased, parametric oscillation occurs at Vi = 66 V,
The output voltage Vo at that time becomes 142 V, and a jump phenomenon occurs. In this state, it can be seen that the output voltage Vo maintains a substantially constant value even if the input voltage Vi rises, and exhibits a good constant voltage property. Next, considering the relationship between the input voltage Vi and the rotation speed N, a jump phenomenon occurs and at the same time, the rotation speed N is N = 2600rp.
It is recognized that even if the input voltage Vi is increased, the rotation speed remains almost constant. In the case of the illustrated device, since the magnetic flux passing through the magnetic core with two poles is orthogonal between the magnetic poles, a strong rotating magnetic field is obtained, and as a result, a bear removing coil is not necessary at all to generate a moving magnetic field. Smooth rotation can be obtained with good startability. The voltage waveforms of the input voltage Vi and the output voltage Vo have good sine waveforms as shown in FIG. Fig. 10 shows the characteristics when a variable resistor is connected in parallel across both ends of the capacitor 10 connected to the secondary side. After the jump phenomenon occurs, the input voltage Vi is kept constant (Vi = 66 volts) and variable. The respective characteristics when the resistance value R of the resistance is changed are illustrated. The motor has a rotation speed N of 2620 rpm to 2420 rpm.
It is recognized that it is controlled over the range of. That is, by connecting a resistor to the secondary side, the magnetic resistance of the magnetic circuit changes, and as a result, the rotation speed N of the motor changes. With regard to the control range of the rotation speed N of the motor, it is possible to obtain better characteristics by using an iron core having insensitive resonance characteristics. The synchronous speed Ns and slip S of this motor are expressed by the following equations. Ns = 120f / P (rpm) S = Ns-N / Ns Here, F is frequency and P is the number of poles. From the above equation, Ns = 3000 rpm and N = 2600 rpm. The relative speed with respect to the rotating magnetic field is Ns-N, and the ratio of this relative speed and the synchronous speed is the slip. Therefore, N must be smaller than Ns in order to generate effective rotation torque. According to an experiment, the motor according to the present invention has a slip S of 13%, and it is found that the motor has sufficient characteristics. [Effects of the Invention] As described above, in the device according to the present invention, since the magnetic flux can directly pass through each magnetic pole function and the characteristic of the parametric circuit is provided, It can be integrated with an electric motor, and can generate effective rotational torque characteristically. Further, the motor has a planar circuit structure, has an extremely simple structure, does not require slots in the stator, and can wind the winding. Further, when a resistor for adjusting the magnetic resistance is inserted in parallel with the capacitor on the secondary side, the rotation speed can be controlled. Further, in the motor of the present invention, since the converter itself has a filter function, a rectangular wave input power source can be used, and the constant voltage characteristic is good and the output voltage has a good waveform. Furthermore, the motor of the present invention can function as a synchronous motor or a hysteresis motor depending on the type of rotor used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view showing an embodiment of a hybrid parametric motor according to the present invention, and FIG. 2 is a view showing a mounted state of a rotor portion of the motor shown in FIG. 1, FIG. 3 is a circuit diagram showing an equivalent circuit of the motor of FIG. 1, FIG. 4 is a circuit diagram showing a parallel resonance circuit, FIG. 5 is a graph showing parallel resonance characteristics, and FIG. 6 is a two-phase AC. FIG. 7 is a graph showing time-current characteristics, FIG. 7 is a graph showing rotating magnetic fields of a stator and a rotor, and FIG.
FIG. 9 is a graph showing the characteristics of the output voltage and the rotation speed with respect to the input voltage, FIG. 9 is a graph showing the input voltage and the output voltage waveform, and FIG. 10 is a graph showing an example of the rotation speed control by resistance connection. In the figure, 1, 2: I-shaped iron core, 4: Hole 5: Cage type rotor, 6, 7: Bracket 8: Bolt, 9: Single-phase input power supply 10: Capacitor, N1a to N1c: Winding N2a to N2d: Winding

Claims (1)

(57) [Claims] A rotor, a primary plane magnetic core circuit, and a secondary plane magnetic core circuit, and the primary plane magnetic core circuit is wound around the magnetic body and a planar magnetic body whose both ends face each other to form a closed magnetic circuit. A primary coil and an AC power source connected in series to the primary coil, and the secondary plane magnetic core circuit is wound around the magnetic body and a planar magnetic body having opposite ends to form a closed magnetic circuit. A secondary coil that is rotated, and a resonance capacitor that is connected in parallel between both terminals of the secondary coil; a line that connects both ends of the magnetic body of the primary planar magnetic core circuit; and a secondary planar magnetic core circuit The primary plane magnetic core circuit and the secondary plane magnetic core circuit are arranged on the same plane so that the line connecting the both ends of the magnetic body of is perpendicular to each other, and a part of the magnetic body of the primary plane magnetic core circuit and the secondary plane magnetic circuit are arranged. Part of the magnetic material of the magnetic core circuit The closed magnetic circuit generated in the secondary planar magnetic core circuit and the closed magnetic circuit generated in the secondary planar magnetic core circuit are integrally configured so as to pass through the same magnetic material, and a line connecting between both ends of the magnetic material of the primary planar magnetic core circuit and a secondary planar magnetic core circuit. By arranging the rotor at a position where the line connecting both ends of the magnetic body is orthogonal to each other, the primary magnetic flux generated in the primary plane magnetic core circuit and the secondary magnetic flux having a phase different from that of the primary magnetic flux generated in the secondary plane magnetic core circuit,
A hybrid parametric motor characterized in that a rotating magnetic flux is generated at the position of the rotor. 2. 2. The hybrid parametric motor according to claim 1, wherein a variable resistor for adjusting the magnetic resistance of the magnetic path is connected in parallel to the resonance capacitor connected in parallel to the secondary coil.