JPH10117495A - Reversible motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a reversible motor provided with a drive device which can rotate the motor at specified speeds regardless of the frequency. SOLUTION: This reversible motor is built up as a permanent magnet synchronous motor, wherein armature windings of different phases constitute a part of a stator and permanent magnets constitute a rotor and is provided with a drive device which is constituted of input terminals 5 connected to a source of AC, a rectifying means 2 which converts the AC voltage input to the input terminals 5 to DC voltage, a converting circuit 3 which converts the DC voltage to a first and a second AC voltage which have the frequency for drive the reversible motor and a phase difference, and output terminals 7 which output the first and the second AC voltage to the armature windings of different phases of the reversible motor 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversible motor configured as a permanent magnet synchronous motor in which two-phase armature windings form a part of a stator and electromagnets form a rotor.

[0002]

2. Description of the Related Art A reversible motor of this kind is incorporated in a game machine, for example, for hitting a pachinko machine driven by a commercial single-phase power supply of 100 V AC. The reversible motor for hitting the ball of the pachinko machine is used as a drive source for rotating a cam for repelling a spring, the ball is repelled by the spring, and the strength of the spring is adjusted by the lever operation of the player. Will be. Conventionally, such a reversible motor has
By using a capacitor, the AC voltage of the single-phase power supply is divided and converted into two-phase AC having a phase difference of 90 °, and the two-phase AC is supplied to each of the two-phase armature windings. It is configured to be driven. In addition, the rotation direction of the reversible motor can be selected depending on which of the two-phase alternating current with respect to the two-phase armature winding is delayed by the phase difference of 90 °.

[0003]

However, in the above-mentioned conventional reversible motor, the frequency (5
0HZ, 60HZ), the frequency of the two-phase alternating current, which is divided by the capacitor, inevitably changes. Therefore, for example, the rotation speed changes depending on the installation area of the pachinko machine in which the reversible motor is installed. There was a problem. Therefore, in place of the reversible motor, a stepping motor that can easily perform such rotation control according to the frequency of the driver may be used. However, such a stepping motor is expensive and has a high torque. About 1/2 of reversible motor
There was a problem that it could not be used as it was because of its low degree. For this reason, when trying to increase the rotational torque, the amount of heat generated increases, and a cooling fin is required to suppress the heat, resulting in a further increase in manufacturing cost.

The present invention has been made in order to effectively solve such problems of the conventional reversible motor, and has provided a driving device capable of rotating at a predetermined speed regardless of the frequency of an AC power supply. It is an object of the present invention to provide a reversible motor having the same.

[0005]

According to a first aspect of the present invention, there is provided a reversible motor according to the present invention, wherein a two-phase armature winding forms a part of a stator and a permanent magnet forms a rotor. A reversible motor configured as: an input terminal connected to an AC power supply, rectifying means for converting an AC voltage input to the input terminal to a DC voltage, and a frequency for driving the reversible motor to the DC voltage. A drive unit for converting the first and second AC voltages into first and second AC voltages having a phase difference with each other and an output terminal for outputting the first and second AC voltages to each of the two-phase armature windings; It is characterized by having.

[0006] The invention described in claim 2 is the invention according to claim 1.
, Wherein the converting means converts the waveforms of the first and second AC voltages into a square wave, and the invention according to claim 3 is the drive according to claim 1 or 2. The apparatus is incorporated in a microcomputer formed into one chip.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. First, the configuration of the reversible motor 10 of the present embodiment will be described with reference to FIG. In FIG. 4, reference numerals 11 and 12 denote two-phase armature windings (hereinafter, referred to as “first windings and second windings”) forming part of a stator, and 13 denotes a permanent magnet forming a rotor 15 together with a rotor support 14. The reversible motor 10 as a permanent magnet type synchronous motor is configured by using these as main elements. The alternating current having a phase difference of 90 electrical degrees is supplied to the first and second windings 11 and 12, so that the rotor 15 rotates around the rotor shaft 16. The relationship among the synchronous rotation speed Ns of the rotor 15, the supply current frequency f, and the number of poles P is expressed by the following equation (1). Ns = 120 · f / P (1)

The relationship between the magnetic pole teeth of the stator formed by winding the first and second windings 11 and 12 and the magnetic poles of the permanent magnet 13 is set together with the operation as shown in FIG. In FIG. 3, reference numerals 17A and 17B denote first magnetic pole teeth whose magnetic poles change in accordance with the direction of energization of the first winding 11;
Reference numeral 18B is a second magnetic pole tooth whose magnetic pole changes in accordance with the direction of conduction of the second winding 12. Further, the alternating current supplied to the first winding 11 is referred to as an A-phase, and the alternating current supplied to the second winding 12 is referred to as a B-phase.
Magnetic pole teeth 17A, 17B and 18A, 18B
Is associated with.

The reversible motor 10 having such a configuration
Means that the rotation direction of the rotor 15 can be selected depending on which of the two-phase alternating currents for the first and second windings 11 and 12 is to be the delay side with a phase difference of 90 °. The rotation of the rotor 15 is transmitted to the output shaft 20 via a gear train including a plurality of gears 19. When the reversible motor 10 is incorporated for hitting a pachinko machine, the rotation of the output shaft 20 rotates a cam that repels a spring, and the spring repels a ball. The strength of the spring is adjusted by the lever operation of the player.

Next, such a reversible motor 10 will be described.
A driving device 1 provided for driving the device will be described with reference to FIG. The driving device 1 is provided with a rectifier 2 composed of a transformer circuit 2A, a rectifier circuit 2B, and a smoothing circuit 2C, and a converter circuit (converter) 3, and the converter circuit 3 incorporates an oscillation circuit 4. ing. here,
Transformation circuit 2A is connected to a commercial power supply of AC 100 V via input terminal 5 and transforms the AC voltage of 100 V into AC of 24 V. 6 is a plug. The 24 V AC is rectified to DC by the rectifier circuit 2B, and is further smoothed by the smoothing circuit 2C before being input to the conversion circuit 3. The conversion circuit 3 converts the 24 V AC into a two-phase AC having a predetermined frequency based on a clock signal having a predetermined frequency from the oscillation circuit 4. The two-phase alternating current is shown in FIG.
The solid line is phase A (first AC voltage) and the dotted line is phase B (second AC voltage) in the figure, and their frequencies are frequencies f obtained by the above equation (1). In the case of this example, they are square waves, and their phase difference is 90 °. These two-phase alternating currents are supplied to the output terminal 7.
Is supplied to the reversible motor 10 described above.

Next, the operation of the reversible motor provided with the control device having the above configuration will be described. The reversible motor 10 supplies the first and second windings 11 and 12 with the two-phase alternating currents of the phases A and B in FIG. Through the steps c) and (d), the rotor 15 rotates to the left in FIG. That is, at time t1 in FIG. 2 where the A-phase is ON and the B-phase is OFF, FIG.
, The first magnetic pole teeth 17A, 17B and the permanent magnet 13
The rotation force of the rotor 15 is generated by the magnetic attraction and the repulsion between the two. In the drawing, the direction of the magnetic attraction action is indicated by a dotted arrow, and the direction of the repulsion action is indicated by a solid arrow. Hereinafter, similarly, at time t2 in FIG.
In FIG. 3B, as shown in FIG.
A rotating force of the rotor 15 is generated by the attraction and repulsion of the magnetic force between the A, 18B and the permanent magnet 13, and at time t3 in FIG. 2, the first force is generated as shown in FIG.
The magnetic force between the magnetic pole teeth 17A and 17B and the permanent magnet 13 causes the rotating force of the rotor 15 to be generated by the attraction and repulsion of the permanent magnet 13, and at time t4 in FIG. The magnetic force between the magnetic pole teeth 18A, 18B and the permanent magnet 13 attracts and repels the magnetic force, thereby generating a rotational force of the rotor 15.

By the way, the driving device 1 is connected to a commercial power supply 10.
0V AC is once rectified to DC and then used for motor drive.
The frequency of commercial power is 50HZ,
In any case of 60 Hz, two-phase alternating current of a constant frequency can be supplied to the reversible motor 10.
Therefore, the reversible motor 10 rotates at a constant speed irrespective of the frequency of the commercial power supply, and generates a prescribed rotational force regardless of the installation area of a device such as a pachinko machine into which the reversible motor is installed, and the intended function Will be demonstrated.

The driving device 1 can be arranged at a position away from the main body of the reversible motor 10 or can be integrated with the main body of the reversible motor 10 to be integrated. Further, the driving device 1 can be configured on a single substrate,
It is also possible to use a microcomputer formed into a chip.

[0014]

As described above, according to the reversible motor according to any one of the first to third aspects, the alternating current input from the input terminal is once rectified to direct current and then converted to two-phase alternating current for driving the motor. In order to perform the conversion, it is possible to supply a two-phase alternating current having a constant frequency to the reversible motor regardless of the frequency of the alternating current input from the input terminal.
The desired function can be exhibited by rotating the reversible motor at a predetermined speed. In particular, claim 2
As described in the invention described in (1), by making the two-phase alternating current for driving the motor a square wave, the reversible motor can be more reliably synchronously rotated.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a driving device according to the present invention.

FIG. 2 is a waveform diagram of a two-phase current output from an output terminal in FIG.

FIG. 3 is a development view of a main part for explaining the operation of the reversible motor driven by the two-phase alternating current in FIG. 2;

FIG. 4 is a sectional view of a reversible motor.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive device 2 rectifier 2A transformer circuit 2B rectifier circuit 2C smoothing circuit 3 converter circuit (converter) 4 oscillator circuit 5 input terminal 6 plug 7 output terminal 10 reversible motor 11, 12 armature winding 13 permanent magnet 14 rotor support 15 Rotor

Claims (3)

[Claims] 1. A reversible motor configured as a permanent magnet type synchronous motor in which a two-phase armature winding forms a part of a stator and a permanent magnet forms a rotor, and is connected to an AC power supply. Rectifying means for converting an AC voltage input to the input terminal into a DC voltage; converting the DC voltage into first and second AC voltages having a phase difference with a frequency for driving the reversible motor. A reversible motor, comprising: a driving unit having: a conversion unit that converts the first and second AC voltages to each of the two-phase armature windings; 2. The reversible motor according to claim 1, wherein said converting means converts the first and second AC voltage waveforms into a square wave. 3. The reversible motor according to claim 1, wherein the driving device is incorporated in a microcomputer formed into one chip.