JP2009044928A - Ac rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an AC rotating machine capable of applying a high voltage to a field coil with an inexpensive configuration to obtain a high variation rate in a field current. <P>SOLUTION: The AC rotating machine is equipped with an armature 2, the field coil 3, and a rotating-machine controlling means 4 for controlling a field current on the basis of a field command. The rotating machine controlling means 4 has a field-voltage applying device 8 to apply a voltage to the field coil 3, a field controller 5 to process a field-voltage command to be applied on the basis of the field command and to output it to the field-voltage applying device 8, a first AC/DC converter 6 to convert the armature voltage of the armature to a DC voltage and to connect it to a DC voltage source, and a second AC/DC converter 7 to convert the armature voltage to the DC voltage and to connect it to the field-voltage applying device. The second AC/DC converter 7 is constituted to obtain a higher DC voltage than that of the first AC/DC converter 6 using at least two pieces of diodes and two pieces of capacitors. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an AC rotating machine provided with an armature, a field winding, and a rotating machine control means for controlling a field current flowing in the field winding based on a field command.

Conventionally, in an AC rotating machine that controls a field current, a field circuit uses a step-down chopper configured by one diode and one semiconductor switch.
This is because the voltage output by the field circuit is a DC voltage lower than that of the DC voltage source, and the step-down chopper is configured by one diode and one semiconductor switch. It is because it is excellent in property.

  On the other hand, there is a multi-cylinder engine in which cylinders that can be rested are set in order to improve the fuel efficiency of an internal combustion engine mounted on a vehicle, particularly in order to improve the fuel efficiency during idling. Since this engine has no output in the explosion cycle of a cylinder with a closed cylinder, the influence of the load during that time works greatly, and the idling rotation falls, and the idling rotation tends to become unstable. Similarly, in order to improve fuel efficiency during idling, if the idling speed is kept low, the idling speed tends to become unstable. In such an on-vehicle AC rotary machine that controls the field current and controls the torque, such as an alternator connected to the internal combustion engine, if the field current can be cut in accordance with the cylinder resting timing, the idle rotation can be performed. Instability can be prevented.

In addition, when an AC rotary machine is connected to the crankshaft of an on-vehicle internal combustion engine via a pulley and a belt, if the AC rotary machine generates regenerative torque while the crankshaft speed of the internal combustion engine is low, the pulley and belt Slip occurs. When such a belt slip occurs, there is a problem that the wear of the belt is promoted to shorten the life of the belt, and this slip can be suppressed by controlling the field current to control the torque.
However, in an AC rotating machine for vehicle use that controls field torque by controlling field current such as an alternator, the electric time constant of the field circuit is a relatively large value because it is necessary to maintain power generation efficiency in an optimum state. It has become. For this reason, there has been a problem that the control response of the field current cannot follow the frequency of the engine idle cylinder and the frequency of the slip generated between the pulley and the belt.

  In addition, if the number of field turns is increased, the field magnetic flux can be obtained efficiently with a small current. However, the maximum value of the DC voltage output by the field voltage applicator is limited, and the field turns The upper limit is determined. This is due to an increase in impedance such as field resistance and inductance as the number of field turns increases. Therefore, there is a desire to increase the number of turns of the field by increasing the maximum value of the DC voltage output from the field circuit and to obtain the field magnetic flux efficiently with a small current.

  In order to solve these problems, for example, in a conventional on-vehicle AC rotating machine disclosed in Japanese Patent Laid-Open No. 5-137294 (hereinafter referred to as Patent Document 1), a rectifier circuit of an onboard alternator is used. A voltage regulator that receives the generated voltage signal at the voltage level detection terminal and shuts off the field current to the field coil of the alternator by a switch circuit when the generated voltage signal exceeds the overcharge determination voltage, and a predetermined amount of battery voltage. A booster circuit that outputs a high voltage; a direct connection terminal to the battery; a relay circuit that selectively connects the booster terminal of the booster circuit to an input terminal of the switch circuit; and the relay during an idling operation of an onboard internal combustion engine The circuit is switched from the directly coupled terminal coupled state to the boost terminal coupled state, and the field current is switched when the internal combustion engine is closed. Therefore, the control means switches the relay circuit from the direct connection terminal connection state to the boost terminal connection state during the idling operation of the internal combustion engine, and the boost circuit increases the battery voltage by a predetermined amount during the idling cycle. By cutting the field current of the alternator, the field current in the cylinder resting cycle is reduced. Specifically, a DC / DC converter is provided in which the DC voltage of the battery is once converted to an AC voltage and then returned to a DC voltage.

  In the conventional on-vehicle AC rotating machine disclosed in Japanese Patent Application Laid-Open No. 2003-174797 (hereinafter referred to as Patent Document 2), the first control means is configured such that the rotational speed of the internal combustion engine is the rotational speed. When a second rotation reference value set in accordance with the fluctuation range of the motor is exceeded, an excitation current is generated from a high voltage power source that generates a voltage higher than the rated output voltage of the vehicle generator by closing the switching element. When the rotation speed of the internal combustion engine becomes equal to or less than the second rotation reference value, the switching element is opened to stop supplying the excitation current, and the excitation current flowing in the field winding is Is attenuated through. Moreover, it is desirable that the above-described circulating circuit includes a resistor having a resistance value that is 10 times or more the electric resistance value of the field winding. The recirculation circuit of a normal control device consists of only one diode, and since the decay time constant is equal to the time constant of the field winding, the excitation current is sufficiently attenuated in a short time after the switching element is opened. Although it cannot be made, attenuation | damping of the exciting current after stopping supply of exciting current is promoted by providing the resistor which has a high resistance value.

  Further, in the conventional on-vehicle AC rotating machine disclosed in Japanese Patent Laid-Open No. 3-230799 (hereinafter referred to as Patent Document 3), the stator coil of the alternator has two circuits, and a normal battery charging stator. In addition to the coil, a high voltage is obtained from a rectifier circuit composed of a diode bridge from the three terminals of the second stator coil, and is connected to the field coil terminal via a transistor. One stator coil is used for battery charging as usual, and the other stator coil is used for generating a high voltage, so that it is not necessary to separately use a booster circuit or the like.

JP-A-5-137294 (FIG. 1) JP 2003-174797 A (FIG. 1) JP-A-3-230799 (FIGS. 1 and 3)

In such a conventional on-vehicle AC rotating machine, the voltage applied to the field circuit is configured to boost the DC voltage, so that a semiconductor switching element such as a DC / DC converter and an inductance are used. There is a problem that a circuit is required and the apparatus becomes expensive.
Further, when the field current is attenuated, the terminal voltage of the field circuit is set to zero, so that the attenuation time constant is not sufficiently shortened. In addition, since the energy of the field winding is consumed by a resistor or a diode, there is a problem in terms of efficiency and heat generation.
Also, since the alternator stator coil has two circuits and the second stator coil also has three terminals, the number of elements and the number of terminals is large, and the number of elements and the number of terminals are reduced in terms of cost and reliability. Is desired.

  The present invention has been made to solve the above-described problems, and is capable of applying a high voltage to the field winding with an inexpensive configuration with a small number of parts, and the rate of change of the field current. An object of the present invention is to obtain an AC rotating machine that can be increased to improve control response and reliability.

  An AC rotating machine according to a first invention includes an armature, a field winding, and a rotating machine control means for controlling a field current of the field winding based on a field command, and the rotating machine control A means for calculating a field voltage command to be applied based on the field command, and applying the field voltage command to the field voltage applicator; A field controller for outputting to a first AC / DC converter for converting an armature voltage of the armature into a DC voltage and connecting to a DC voltage source; and converting the armature voltage of the armature to a DC voltage to convert the field A second AC / DC converter connected to the magnetic voltage applicator, wherein the second AC / DC converter uses at least two diodes and two capacitors. The DC voltage is higher than the DC voltage.

  According to a second aspect of the present invention, an AC rotating machine includes a first armature having three or more phases, a second armature having two or less phases, a field winding, and a field winding based on a field command. A rotating machine control means for controlling the field current of the field machine, the rotating machine control means comprising: a field voltage applicator for applying a voltage to the field winding; and a field to be applied based on the field command. A field controller that calculates a magnetic voltage command and outputs the field voltage command to the field voltage applicator, and converts the first armature voltage of the first armature into a DC voltage and is connected to a DC voltage source. And a second AC / DC converter that converts the second armature voltage of the second armature to a DC voltage and connects the DC voltage to the field voltage applicator, The number of windings of at least one phase of the second armature is larger than the number of windings of the first armature.

According to the first invention, it is possible to apply a high voltage to the field of the AC rotating machine with an inexpensive configuration, and as a result, the rate of change of the output torque of the AC rotating machine can also be increased.
That is, according to the present invention, the field current is changed with a configuration having a smaller number of parts than the DC / DC converter by rectifying a high voltage using the second AC / DC converter instead of boosting the DC. The rate can be increased.

  According to the second aspect of the invention, the second armature voltage having a larger number of turns than the first armature is rectified using the second AC / DC converter, instead of boosting the direct current. As a result, the rate of change of the field current can be increased with a configuration having fewer terminals and wires than the AC rotating machine provided with the conventional second AC / DC converter.

  The above-described and other objects, features, and effects of the present invention will become more apparent from the detailed description and the drawings in the following embodiments.

Embodiment 1 FIG.
1 is a block diagram showing an AC rotating machine according to Embodiment 1 of the present invention.
In FIG. 1, an AC rotating machine 1 controls an armature 2, a field winding (hereinafter also simply referred to as a field) 3, and a field current of the field winding 3 based on a field command. A rotator (not shown) is provided which includes a rotator control means 4 and is connected to the armature 2 in a magnetic circuit manner.
The rotating machine control means 4 includes a field controller 5, a first AC / DC converter 6, a second AC / DC converter 7, and a field voltage applicator 8.
The three-phase terminals of the armature 2 are connected to the first AC / DC converter 6. The first AC / DC converter 6 constitutes a rectifier circuit by six diodes connected in series with each other, and converts energy from AC to DC. The energy converted into direct current is output from the direct current terminal of the first alternating current direct current converter 6. The second AC / DC converter 7 connected to two phases of the three-phase terminals of the armature 2 includes a phase composed of two diodes connected in series and a phase composed of two capacitors connected in series. It is constituted by.
This configuration is known as a voltage doubler rectifier circuit (see, for example, Japanese Patent Application Laid-Open No. 58-204770, FIG. 1). The first AC / DC converter 6 converts the voltage to 2 when the energy is converted from AC to DC. Double voltage can be output.

  The field voltage application circuit 8 has a configuration in which a semiconductor switch element that can be turned on and off by a control signal and a diode are connected in series. The field voltage applicator 8 and the field winding 3 are connected so that the diode and the field winding 3 of the AC rotating machine 1 are in parallel. The field controller 5 generates a control signal to be applied to the semiconductor switch element that can be turned on and off inside the field voltage applicator 8 so that the field current flowing through the field winding 3 matches the field command. The command is output to the field voltage applicator 8 as a command.

The impedance of the field winding is divided into a resistance component and an inductance component, but the inductance component of the AC rotating machine is more dominant than the resistance component.
When the resistance component is ignored, the rate of change of the field current is proportional to the magnitude of the applied voltage and inversely proportional to the magnitude of the inductance. That is, in an AC rotating machine, the rate of change of the field current tends to be small because the inductance is large, and the rate of change of the field current can be increased by increasing the applied voltage.

As described above, the AC rotating machine 1 according to the first embodiment includes the armature 2, the field winding 3, and the rotating machine control means 4 that controls the field current of the field winding 3 based on the field command. The rotating machine control means 4 calculates a field voltage command to be applied based on the field command, a field voltage applicator 8 for applying a voltage to the field winding 3, and this field voltage. A field controller 5 that outputs a command to the field voltage applicator 8, a first AC / DC converter 6 that converts the voltage of the armature 2 into a DC voltage and connects it to a DC voltage source, and the voltage of the armature 2 is converted to DC The second AC / DC converter 7 converts the voltage into a field voltage applicator 8 and connects it to the field voltage applicator 8. The second AC / DC converter 7 uses at least two diodes and two capacitors. Yes.
With the configuration in which the second AC / DC converter 7 is connected to the DC terminal of the field voltage applicator 8, the DC voltage converted from AC by the second AC / DC converter 7 is converted by the first AC / DC converter 6. It can be made higher than the DC voltage converted from AC, and the rate of change of the field current can be made higher. As a result, there is an effect that the responsiveness of the field current to the field command can be enhanced.

It is more effective when such an AC rotating machine is applied to a device having a low DC voltage that can be applied to the field winding. For example, in the case of an on-vehicle alternator, the DC voltage that can be applied to the field winding is 12 V. By applying this AC rotating machine, the DC voltage can be boosted to more than twice as high as the field winding. Can be applied.
In addition, when such an AC rotating machine is applied to an alternator, the rate of change of the field current is increased so that the frequency of the engine idle cylinder and the frequency of the slip generated between the pulley and the belt can be tracked. Can be improved. As a result, the responsiveness of the field current to the field command can be improved, and the field current can be cut in accordance with the cylinder resting timing, thereby preventing idle rotation from becoming unstable.
Further, in an application in which an AC rotating machine is connected to a crankshaft of an in-vehicle internal combustion engine via a pulley and a belt, slip generated between the pulley and the belt can be suppressed by a high field current control response. .

Further, by increasing the maximum value of the DC voltage output from the field circuit, the number of turns of the field winding can be increased, and the field magnetic flux can be efficiently obtained with a small current. As a result, it is possible to reduce brush heat generation and contribute to reduction of brush wear and long life.
Alternatively, by increasing the maximum value of the DC voltage output by the field circuit, it is possible to use a field winding having a large number of turns, so that a thin and inexpensive winding can be used for the field to make it cheaper, The dimensions can be reduced.

  Further, in the first embodiment, instead of the DC / DC converter that once converts the DC voltage of the battery of the conventional apparatus to AC and increases the voltage and then returns to DC, the second AC / DC converter 7 is provided to perform AC rotation. Since the AC voltage of the machine 1 is converted to DC, the inductance required for the DC / DC converter, the semiconductor switch element that can be turned on / off by the control signal, and the control signal generation means to be given to the semiconductor switch element become unnecessary. The effect is simple and the number of parts can be reduced. As a result, there are advantages in terms of device reliability and installation dimensions.

Embodiment 2. FIG.
2 is a block diagram showing an AC rotating machine according to Embodiment 2 of the present invention.
In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
As shown in FIG. 2, the AC rotating machine according to Embodiment 2 of the present invention has a field between a DC terminal of the first AC / DC converter 6a and a DC terminal of the second AC / DC converter 7a. The voltage charger 10 is attached. That is, the field voltage charger 10 includes a diode between the positive terminal of the DC terminal of the first AC / DC converter 6a and the positive terminal of the DC terminal of the second AC / DC converter 7a, and the first AC / DC converter 6a. A diode is provided between the negative terminal of the DC terminal of the DC converter 6a and the negative terminal of the DC terminal of the second AC / DC converter 7a.
The diode between the positive terminal of the DC terminal of the first AC / DC converter 6a and the positive terminal of the DC terminal of the second AC / DC converter 7a is connected from the first AC / DC converter 6a to the second AC / DC converter. Connect forward in the direction of 7a. The diode between the negative terminal of the DC terminal of the first AC / DC converter 6a and the negative terminal of the DC terminal of the second AC / DC converter 7a is connected to the first AC / DC from the second AC / DC converter 7a. A forward connection is made in the direction of the converter 6a.

For example, when the rotor of the AC rotating machine does not have magnet magnetic flux and does not include the field voltage charger 10, no voltage is generated in the armature 2 unless a field current flows through the field winding 3. The energy for the second AC / DC converter 7a to convert to DC cannot be obtained from the armature 2.
In this example, if the capacitor of the second AC / DC converter 7a is charged in advance before starting, the field voltage applicator 8 generates a field current in the field winding 3, and the second It is possible to obtain energy from the armature 2 for the AC / DC converter 7a to convert to DC, but when the capacitor of the second AC / DC converter 7a is in a discharged state and has no charge at startup, The field voltage applicator 8 cannot generate a field current in the field winding 3, and the second AC / DC converter 7a cannot obtain energy from the armature 2 for conversion to DC. A voltage cannot be generated in the armature 2.

Therefore, as in the second embodiment, the field voltage charger 10 constituted by two diodes is connected between the DC terminal of the first AC / DC converter 6a and the DC terminal of the second AC / DC converter 7a. When the DC voltage output from the second AC / DC converter 7a is lower than the voltage at the DC terminal of the first AC / DC converter 6a, the DC of the second AC / DC converter 7a is provided. The terminal has the same potential as the voltage of the DC terminal of the first AC / DC converter 6a.
According to the configuration of the second embodiment, if a power storage device such as a battery is connected to the DC side terminal of the first AC / DC converter 6a, the capacitor of the second AC / DC converter 7a is always charged. Therefore, even when the rotor of the AC rotating machine has no magnet magnetic flux, it is possible to generate a voltage in the armature 2, and as a result, the first AC / DC converter 6a and There is an effect that the second AC / DC converter 7a can DC / AC convert the energy obtained from the armature 2 respectively.

  If a voltage is generated in the armature 2, the DC voltage output from the second AC / DC converter 7a is higher than the voltage at the DC terminal of the first AC / DC converter 6a. By the action of the diode 10, the DC terminal of the first AC / DC converter 6a and the DC terminal of the second AC / DC converter 7a are opened, and the DC voltage output by the second AC / DC converter 7a. Has an effect that it can be kept higher than the DC voltage output from the first AC / DC converter 6a.

  Also in the second embodiment, the second AC / DC converter 7a is provided instead of the DC / DC converter for converting the DC voltage of the battery of the conventional apparatus into an alternating current to increase the voltage and returning it to the direct current. Since the alternating voltage of the rotating machine 1 is converted to direct current, as in the first embodiment, the inductance required for the DC / DC converter, the semiconductor switch element that can be turned on / off by a control signal, and the semiconductor switch element There is no need for the control signal generating means to be applied, and there is an effect that the number of parts can be reduced simply. As a result, there are advantages in terms of reliability and installation dimensions of the apparatus.

  In the second embodiment, the field voltage charger 10 is provided with two diodes between the DC terminal of the first AC / DC converter 6a and the DC terminal of the second AC / DC converter 7a. Although configured, any one of the two may be omitted. In this case, the maximum voltage of the second AC / DC converter 7a is somewhat lowered, but there are advantages in terms of improving reliability and reducing installation dimensions by reducing the number of components by reducing the number of diodes.

Embodiment 3 FIG.
3 is a block diagram showing an AC rotating machine according to Embodiment 3 of the present invention.
In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
The second AC / DC converter 7 described in the first embodiment is configured by two diodes and two capacitors, but in the third embodiment, as shown in FIG. The converter 7b is configured by four diodes and two capacitors. That is, in FIG. 3, the second AC / DC converter 7 b connected to the three-phase terminal of the armature 2 includes two phases composed of two diodes connected in series and two capacitors connected in series. It consists of one phase. When the discharge period of the capacitor becomes longer, it is necessary to increase the capacity of the capacitor. However, with this configuration, when alternating current is converted to direct current, the charge is charged in the capacitor through the diode. There is an effect that the capacitor capacity can be made smaller than that of the second DC / AC converter 7.

  Also in the third embodiment, a second AC / DC converter 7b is provided in place of the DC / DC converter that converts the DC voltage of the battery of the conventional apparatus into an AC voltage and then returns it to a DC voltage. Since the AC voltage of the machine 1 is converted to DC, the inductance required for the DC / DC converter, the semiconductor switch element that can be turned on / off by the control signal, and the control signal generation means to be given to the semiconductor switch element become unnecessary. The effect is simple and the number of parts can be reduced. As a result, there are advantages in terms of reliability and installation dimensions of the apparatus.

  Further, when the AC rotating machine is installed beside the internal combustion engine, a capacitor having high heat resistance is desirable, but a capacitor having good heat resistance is expensive. If the configuration of the third embodiment is used, the capacitance of the capacitor can be reduced, so that a capacitor having good heat resistance can be easily used, and there is an advantage in terms of reliability of the device and freedom of arrangement.

Embodiment 4 FIG.
FIG. 4 is a block diagram showing an AC rotating machine according to Embodiment 4 of the present invention.
In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
The second AC / DC converter 7b described in the third embodiment is configured by four diodes and two capacitors. However, in the fourth embodiment, as shown in FIG. The converter 7c is composed of nine diodes and three capacitors. In FIG. 4, the configuration of the second AC / DC converter 7c connected to the three-phase terminal of the armature 2 is also known as a voltage doubler rectifier circuit (see, for example, FIG. 3 of JP-A-60-109766). , A continuous DC output voltage whose phase is shifted by 120 degrees can be obtained, so that the ripple content can be made smaller than that of the second AC / DC converter described in the third embodiment, and the capacitor This has the effect of reducing the capacity.

  When an AC rotating machine is installed beside an internal combustion engine, a capacitor having high heat resistance is desirable, but a capacitor having good heat resistance is expensive. If the configuration of the fourth embodiment is used, the capacitance of the capacitor can be reduced. Therefore, a capacitor having good heat resistance can be easily used, and there are advantages in terms of reliability of the device and freedom of arrangement. .

Embodiment 5 FIG.
FIG. 5 is a block diagram showing an AC rotating machine according to Embodiment 5 of the present invention.
In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
The second AC / DC converter 7 described in the first embodiment is configured by two diodes and two capacitors, but in the fifth embodiment, as shown in FIG. The converter 7d is configured to be voltage rectified three times by three diodes and three capacitors. That is, the second AC / DC converter 7d connected to the two phases of the three-phase terminals of the armature 2 of the AC rotating machine 1 includes three diodes and three capacitors. This configuration is known as a triple voltage rectifier circuit (see, for example, FIG. 1 of Japanese Patent Application Laid-Open No. 59-76176), and with respect to the voltage when the first AC / DC converter 6 converts energy from AC to DC. Three times the voltage can be output. Therefore, according to the fifth embodiment, it is possible to output a higher DC voltage to the field voltage applicator 8 than the second AC / DC converter described in the first to fourth embodiments. Thereby, there is an effect that the control response of the field current becomes higher.

  As described above, according to the AC rotating machine of the fifth embodiment, by increasing the rate of change of the field current, it is possible to follow the frequency of the engine idle cylinder and the frequency of the slip generated between the pulley and the belt. Can be improved.

  In the fifth embodiment, the second AC / DC converter 7d is provided in place of the DC / DC converter for converting the DC voltage of the battery of the conventional apparatus into an AC voltage to increase the voltage and returning it to the DC voltage. Since the AC voltage of the machine 1 is converted to DC, the inductance required by the DC / DC converter, the semiconductor switch element that can be turned on / off by the control signal, and the control signal generation means to be given to the semiconductor switch element are unnecessary. The effect is simple and the number of parts can be reduced. As a result, there are advantages in terms of reliability and installation dimensions of the apparatus.

Embodiment 6 FIG.
FIG. 6 is a block diagram showing an AC rotating machine according to Embodiment 6 of the present invention.
In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
Although the second AC / DC converter 7d described in the fifth embodiment is configured by three diodes and three capacitors, in the sixth embodiment, as shown in FIG. The second AC / DC converter 7e connected to the phase terminal is configured to be voltage rectified three times by twelve diodes and six capacitors.

  In FIG. 6, the second DC / AC converter 7e rectifies the voltage generated in the armature 2 by rectifying means having a rectifying element connected to a three-phase bridge so as to obtain a predetermined DC output voltage between the output terminals. Specifically, it has a single-phase voltage doubler rectification block group interposed between positive-side and negative-side rectifier elements forming each phase of the three-phase bridge, and each single-phase voltage doubler rectifier block The positive electrode side is connected to the anode side of the positive rectifier element of each phase of the three-phase bridge, and the negative electrode side is connected to the cathode side of the negative rectifier element of each set of the three-phase bridge, respectively, Adjacent phases of the three-phase AC power supply are sequentially connected. This configuration is known as a triple voltage rectifier circuit (see, for example, FIG. 3 of Japanese Patent Laid-Open No. 61-92172), and with respect to the voltage when the first AC / DC converter 6 converts energy from AC to DC. Three times the voltage can be output. Therefore, it is possible to output a higher DC voltage to the field voltage applicator 8.

Thereby, there is an effect that the control response of the field current becomes higher. Further, since a continuous DC output voltage whose phase is shifted by 120 degrees can be obtained, the ripple content can be made smaller than that of the second AC / DC converter 7d described in the fifth embodiment. . In other words, the DC voltage output from the second AC / DC converter 7e can be voltage rectified three times at a higher frequency than that of the fifth embodiment, so that the capacitance of the capacitor can be reduced.
When an AC rotating machine is installed beside an internal combustion engine, a capacitor having high heat resistance is desirable, but a capacitor having good heat resistance is expensive. If the configuration of the sixth embodiment is used, the capacitance of the capacitor can be reduced. Therefore, it is easy to use a capacitor with good heat resistance, and there are advantages in terms of the reliability of the device and the degree of freedom of arrangement.

Embodiment 7 FIG.
FIG. 7 is a block diagram showing an AC rotating machine according to Embodiment 7 of the present invention.
In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
In the seventh embodiment, field voltage charging as shown in FIG. 7 is performed between the DC terminal of the first AC / DC converter and the DC terminal of the second AC / DC converter of the sixth embodiment. A vessel 10 is attached. That is, the field voltage charger 10 includes a diode between the positive terminal of the DC terminal of the first AC / DC converter 6a and the positive terminal of the DC terminal of the second AC / DC converter 7f, A diode is provided between the negative terminal of the DC terminal of the AC / DC converter 6a and the negative terminal of the DC terminal of the second AC / DC converter 7f.
The diode between the positive terminal of the DC terminal of the first AC / DC converter 6a and the positive terminal of the DC terminal of the second AC / DC converter 7f is connected from the first AC / DC converter 6a to the second AC / DC converter. Connect forward in the direction of 7f. The diode between the negative terminal of the DC terminal of the first AC / DC converter 6a and the negative terminal of the DC terminal of the second AC / DC converter 7f is connected to the first AC / DC from the second AC / DC converter 7f. A forward connection is made in the direction of the converter 6a.

  According to the seventh embodiment of the present invention, by adopting the above configuration, even if the second AC / DC converter 7f is a triple voltage rectifier circuit, at least 2 as in the second embodiment. By providing the field voltage charger 10 constituted by a plurality of diodes between the DC terminal of the first AC / DC converter 6a and the DC terminal of the second AC / DC converter 7f, the first AC When the DC voltage output from the second AC / DC converter 7f is lower than the voltage at the DC terminal of the DC converter 6a, the DC terminal of the second AC / DC converter 7f is connected to the DC of the first AC / DC converter 6a. Since the potential is the same as the voltage at the terminal, if a power storage device such as a battery is connected to the DC side terminal of the first AC / DC converter 6a, the capacitor of the second AC / DC converter 7f is always charged. It will be in the state. As a result, even when the rotor of the AC rotating machine has no magnetic flux, it is possible to generate a voltage in the armature 2, and as a result, the first DC / AC converter 6a and the second AC / DC are generated. There is an effect that the converter 7f can convert the energy obtained from the armature 2 into direct current alternating current.

Embodiment 8 FIG.
FIG. 8 is a block diagram showing an AC rotating machine according to Embodiment 8 of the present invention.
In the figure, the same reference numerals as those in FIG. 7 denote the same or corresponding parts.
The field voltage applicator 8 described in the above embodiment has a configuration in which one semiconductor switch element that can be turned on and off by a control signal and one diode are connected in series, and the diode and the field winding 3 are connected in parallel. Although the field voltage applicator 8 and the field winding 3 are connected so as to become, in this eighth embodiment, as shown in FIG. 8, the field voltage applicator 8g is a voltage reversible type 2. It is a quadrant chopper.
That is, in FIG. 8, the field voltage applicator 8g is configured using a semiconductor switch element that can be turned on / off by two diodes and two control signals.
This configuration is known as a voltage reversible two-quadrant chopper (see, for example, FIG. 1 of JP-A-1-202157), and can obtain an effect that the field current can be controlled at high speed.

  As described above, according to the eighth embodiment, the field voltage applicator 8g is configured as a voltage reversible two-quadrant chopper, so that the field voltage applicator 8g has the rate of change of the field current as described in the above embodiment. A voltage twice that of the field voltage applicator described in 1 can be applied. Thereby, the rate of change of the field current can be made higher than in the above embodiment.

Embodiment 9
FIG. 9 is a block diagram showing an AC rotating machine according to Embodiment 9 of the present invention.
In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
The second AC / DC converter 7d described in the fifth embodiment is configured to rectify the voltage three times by three diodes and three capacitors, but in the ninth embodiment, as shown in FIG. The second AC / DC converter is configured to perform voltage rectification four times by four diodes and four capacitors.
In FIG. 9, the second AC / DC converter 7h connected to the two phases of the three-phase terminals of the armature 2 is composed of four diodes and four capacitors. This configuration is known as a quadruple voltage rectifier circuit (see, for example, FIG. 1 of Japanese Patent Application Laid-Open No. 61-227670), and with respect to the voltage when the first AC / DC converter 6 converts energy from AC to DC. Four times the voltage can be output. Therefore, it is possible to output a higher DC voltage to the field voltage applicator 8 than the second AC / DC converter described in the above embodiment. Thereby, there is an effect that the control response of the field current becomes higher.

As described above, according to the ninth embodiment, by increasing the rate of change of the field current, the followability to the frequency of the engine idle cylinder and the frequency of the slip generated between the pulley and the belt can be improved. Can do.
In addition, instead of the DC / DC converter that once converts the DC voltage of the battery of the conventional apparatus to AC to increase the voltage and then returns it to DC, a second AC / DC converter 7h is provided to convert the AC voltage of the AC rotating machine 1 to DC. Therefore, the inductance required for the DC / DC converter, the semiconductor switch element that can be turned on / off by the control signal, and the control signal generation means to be given to the semiconductor switch element become unnecessary, and the number of parts can be simplified. effective. As a result, there are advantages in terms of reliability and installation dimensions of the apparatus.

Embodiment 10 FIG.
10 is a block diagram showing an AC rotating machine according to Embodiment 10 of the present invention. In the figure, the same reference numerals as those in FIG. 8 denote the same or corresponding parts.
The field voltage applicator 8g described in the eighth embodiment is a voltage reversible two-quadrant chopper using two diodes and a semiconductor switch element that can be turned on and off by two control signals. The field voltage applicator 8i is configured by a single-phase inverter using semiconductor switching elements that can be turned on and off by four diodes and four control signals.
In FIG. 10, the field voltage applicator 8i is configured using four diodes and a semiconductor switch element that can be turned on / off by four control signals. This configuration is known as a single-phase inverter (see, for example, FIG. 3 of JP-A-62-213577). The field current can be controlled at high speed and the current polarity can be selected freely.

Thus, in the tenth embodiment, the field voltage applicator 8i is configured as a single-phase inverter, so that the field voltage applicator 8i can freely select the positive / negative polarity of the field current.
For example, when it is desired to superimpose a frequency F hertz component on the field current of the DC component K1 ampere, that is, when it is desired to give the field current as “K1 + K2 cos (2π × F × t)” ampere, Has a positive constraint, the amplitude K2, which is the peak value of the frequency F hertz component, can be superimposed only in the range of | K1 |> | K2 |. In the tenth embodiment, since the field voltage applicator 8i is a single-phase inverter, if the frequency F hertz component is to be superimposed on the field current of the DC component K1 ampere, the field current may be either positive or negative. The amplitude K2 of the frequency F hertz component can be superimposed at K1 amperes or less or K1 amperes or more.
Further, since the torque generated by the AC rotating machine 1 is substantially proportional to the field current, if the amplitude of the frequency F hertz component of the field current can be increased, the F hertz component torque generated by the AC rotating machine 1 is also increased. There is an effect that can be done.

  As described above, according to the tenth embodiment of the present invention, the field voltage applicator 8i is a single-phase inverter, so that it is synchronized with the frequency of the engine idle cylinder and the frequency of the slip generated between the pulley and the belt. Thus, the torque of the AC rotating machine desired to be generated can be increased. As a result, there is an advantage that it is possible to enhance the suppression effect of vibration caused by the engine dead cylinder and slip generated between the pulley and the belt.

Embodiment 11 FIG.
In the tenth embodiment described above, the field voltage applicator 8i is configured using four diodes and a semiconductor switch element that can be turned on / off by four control signals. However, as shown in FIG. It goes without saying that the same effect can be obtained even if a power MOSFET incorporating a diode is used. FIG. 11 shows the configuration of the field voltage applicator 8j according to the eleventh embodiment. By using a total of four power MOSFETs 20, 21, 22, and 23 having built-in reverse diodes, The semiconductor switch element can be turned on / off by a diode and four control signals.

Embodiment 12 FIG.
12 is a block diagram showing an AC rotating machine according to Embodiment 12 of the present invention.
In the first to eleventh embodiments, a high voltage is obtained where the second AC / DC converter rectifies from AC, but the twelfth embodiment of the present invention is shown in FIG. As described above, the second armature 2n provided in the AC rotating machine and the second AC / DC conversion for converting the second armature voltage of the AC rotating machine into a DC voltage and connecting it to the field voltage applicator 8 And the voltage of the second armature 2n itself is increased.

  That is, in FIG. 12, the AC rotating machine of the twelfth embodiment is based on a three-phase first armature 2m, a two-phase second armature 2n, a field winding 3, and a field command. Rotating machine control means 4k for controlling the field current, and the rotating machine control means 4k converts the voltage of the second armature 2n into a DC voltage and connects it to the field voltage applicator 8. A DC converter 7k is provided, and the second armature 2n has a larger number of turns than the first armature 2m.

  FIG. 13 is a diagram showing an internal configuration of the rotating machine main body 1k. In the figure, the first armature 2m is constituted by a first U-phase winding 30, a first V-phase winding 31, and a first W-phase winding 32, and the number of turns is equal. . The second armature 2n includes a second V-phase winding 33 connected to the first V-phase winding 31 and a second W-phase winding 34 connected to the first W-phase winding 32. Thus, the number of turns is larger than that of the first armature 2m by the amount of the second V-phase winding 33 and the second W-phase winding 34. As a result, when the rotating machine main body 1k is rotating, the armature voltage of the second armature 2n is higher than the armature voltage of the first armature 2m.

  According to the AC rotating machine of the twelfth embodiment configured as described above, a voltage higher than the first armature voltage can be obtained from the second armature 2n, and the second armature. Since 2n has windings of two or less phases and the second AC / DC converter 7k also has two phases, the number of terminals and wires is less than that of the conventional AC rotating machine described in Patent Document 3. The rotating machine main body 1k and the rotating machine control means 4k can be connected, and there is an advantage that it can be released from the reliability and the troublesomeness of wiring.

  In addition, since the DC voltage output from the second AC / DC converter 7k to the field voltage applicator 8 can be made higher, the rate of change of the field current can be increased. Further, instead of boosting the direct current, the second armature voltage having a larger number of turns than the first armature is rectified using the second alternating current / direct current converter, so that a component is obtained from the DC / DC converter. There is an effect that the rate of change of the field current can be increased with a configuration having a small number of points.

Embodiment 13 FIG.
FIG. 14 is a configuration diagram showing an AC rotating machine according to Embodiment 13 of the present invention, in which the second armature is insulated from the first armature, and the first AC / DC converter according to Embodiment 12 is provided. The field voltage charger 10p is attached between the DC terminal and the DC terminal of the second AC / DC converter.
In FIG. 14, the AC rotating machine according to the thirteenth embodiment includes a three-phase first armature 2m, a two-phase second armature 2n, a field winding 3, and a field based on a field command. A rotating machine control means 4p for controlling the magnetic current, and the rotating machine control means 4p converts the voltage of the first armature 2m into a DC voltage and connects it to a DC voltage source; The second AC / DC converter 7p which converts the voltage of the second armature 2n into a DC voltage and connects to the field voltage applicator 8, the DC terminal of the first AC / DC converter 6p and the second AC It consists of a field voltage charger 10p connected between the DC terminals of the DC converter 7p, the negative electrode of the DC side terminal of the first AC / DC converter 6p, and the negative electrode of the second AC / DC converter 7p. Are connected to have the same potential. Further, the second armature 2n has a larger number of turns than the first armature 2m.

FIG. 15 is a diagram illustrating an internal configuration of the rotating machine main body 1p according to the thirteenth embodiment.
In FIG. 15, the first armature 2m is constituted by a first U-phase winding 30, a first V-phase winding 31, and a first W-phase winding 32, as in the twelfth embodiment. The number of turns is equal. The second armature 2n includes a second U-phase winding 40 and a second W-phase winding that are electrically insulated from the first U-phase winding 30 and the first W-phase winding 32. The number of turns is set larger than the number of turns of the first armature 2m. As a result, when the rotating machine main body 1p is rotating, the armature voltage of the second armature 2n is higher than the armature voltage of the first armature 2m.

  According to the thirteenth embodiment, since the second armature 2n is insulated from the first armature 2m, the DC terminal of the first AC / DC converter 6p and the DC of the second AC / DC converter 7p. Either the negative electrode or the positive electrode of the terminal may be set to the same potential. As a result, the field voltage charger 10p attached between the first AC / DC converter 6p and the second AC / DC converter 7p There is an advantage that the diode can be configured by one less than the above embodiment.

  Further, if only one diode is provided as the field voltage charger 10p and a power storage device such as a battery is connected to the DC side terminal of the first AC / DC converter 6p, the second AC / DC converter 7p is used. Since the voltage at the DC side terminal is at least equal to or higher than the voltage at the DC side terminal of the first AC / DC converter 6p, the voltage is applied to the armature 2 even when the rotor of the AC rotating machine has no magnetic flux. As a result, there is an effect that the first AC / DC converter 6p and the second DC / AC converter 7p can respectively convert the energy obtained from the armature into AC / DC.

Embodiment 14 FIG.
The AC rotating machine according to the twelfth embodiment has the three-phase first armature and the two-phase second armature, but the first armature includes the first armature and the second armature. Of these, one phase may be shared and connected to the rotating machine control means.
FIG. 16 is a block diagram showing an AC rotating machine according to Embodiment 14 of the present invention thus configured.
As shown in FIG. 16, the AC rotating machine according to the fourteenth embodiment is based on a three-phase first armature 2m, a two-phase second armature 2q, a field winding 3, and a field command. A rotating machine control means 4q for controlling the field current, and the rotating machine control means 4q converts the voltage of the second armature 2q into a DC voltage and connects it to the field voltage applicator 8. A DC converter 7q is provided, and the second armature 2q shares one phase of the three phases of the first armature 2m and one phase of the second armature 2q.

FIG. 17 is a diagram illustrating an internal configuration of the rotating machine main body 1q according to the fourteenth embodiment.
By connecting as shown in FIG. 17, one phase of the first armature 2m and one phase of the second armature 2q can be made common. As a result, there is an effect that the rotating machine body 1q and the rotating machine control means 4q can be connected with a smaller number of terminals and wires than the AC rotating machine of the twelfth embodiment.
In addition, since the second AC / DC converter 7q has two phases, it is possible to configure the second AC / DC converter with a smaller number of parts than in the conventional apparatus, which is free from reliability and troublesome wiring. There are advantages you can do.

It is a block diagram which shows the alternating current rotating machine by Embodiment 1 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 2 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 3 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 4 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 5 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 6 of this invention. It is a block diagram which shows the alternating current rotary machine by Embodiment 7 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 8 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 9 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 10 of this invention. It is a block diagram which shows the field voltage applicator by Embodiment 11 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 12 of this invention. It is a figure which shows the internal structure of the rotary machine main body in Embodiment 12 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 13 of this invention. It is a figure which shows the internal structure of the rotary machine main body in Embodiment 13 of this invention. It is a block diagram which shows the alternating current rotating machine by Embodiment 14 of this invention. It is a figure which shows the internal structure of the rotary machine main body in Embodiment 14 of this invention.

Explanation of symbols

1 AC rotating machine, 2 armature, 3 field winding, 4 rotating machine control means, 5 field controller,
6 first AC / DC converter, 7 second AC / DC converter, 8 field voltage applicator,
10 Field voltage charger.

Claims (11)

  An armature; a field winding; and a rotating machine control means for controlling a field current of the field winding based on a field command. The rotating machine control means includes a voltage applied to the field winding. A field voltage applicator for applying a field voltage, a field voltage command to be applied based on the field command, and a field controller for outputting the field voltage command to the field voltage applicator, and the armature A first AC / DC converter that converts the armature voltage of the armature into a DC voltage source and connects to a DC voltage source; and a second AC / DC converter that converts the armature voltage of the armature into a DC voltage and connects to the field voltage applicator. An AC / DC converter, wherein the second AC / DC converter obtains a DC voltage higher than the DC voltage of the first AC / DC converter by using at least two diodes and two capacitors. An AC rotating machine characterized in that it is configured as described above.   The rotating machine control means includes a field voltage charger constituted by at least one diode between a DC terminal of the first AC / DC converter and a DC terminal of the second AC / DC converter. The AC rotating machine according to claim 1, wherein the AC rotating machine is provided.   3. The AC rotating machine according to claim 1, wherein the second AC / DC converter is configured to perform voltage doubler rectification using at least nine diodes and three capacitors. 4. .   3. The AC rotation according to claim 1, wherein the second AC / DC converter is configured to perform voltage rectification three times using at least three diodes and three capacitors. 4. Machine.   3. The AC rotation according to claim 1, wherein the second AC / DC converter is configured to perform voltage triple rectification using at least 12 diodes and 6 capacitors. 4. Machine.   3. The AC rotation according to claim 1, wherein the second AC / DC converter is configured to rectify the voltage four times using at least four diodes and four capacitors. 4. Machine.   3. The voltage reversible two-quadrant chopper using at least two diodes and two semiconductor switching elements that can be turned on and off by a control signal is used as the field voltage applicator. AC rotating machine.   3. The AC rotation according to claim 1, wherein the field voltage applicator is a single-phase inverter using at least four diodes and four semiconductor switch elements that can be turned on and off by a control signal. Machine.   A first armature having three or more phases, a second armature having two or less phases, a field winding, and a rotating machine control means for controlling a field current of the field winding based on a field command; The rotating machine control means calculates a field voltage command to be applied based on the field command, and a field voltage command to apply a voltage to the field winding, the field voltage command A field controller that outputs the first armature voltage of the first armature to a DC voltage and connects to a DC voltage source; and A second AC / DC converter for converting a second armature voltage of the second armature to a DC voltage and connecting to the field voltage applicator, and at least one phase of the second armature The AC rotating machine is characterized in that the number of windings is larger than the number of windings of the first armature. The rotating machine control means includes a field voltage charger constituted by at least one diode between a DC terminal of the first AC / DC converter and a DC terminal of the second AC / DC converter. The AC rotating machine according to claim 9, wherein the AC rotating machine is provided.   The AC rotation according to claim 9, wherein one phase of the first armature and one phase of the second armature are connected in common to the rotating machine control means. Machine.

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