JPH07264896A - Exciting device for rotary electric machine - Google Patents

Abstract

PURPOSE:To obtain an exciting device for rotary electric machine the automatic voltage regulating device of which can control the output voltage of a rotary electric machine with high responsiveness and high accuracy. CONSTITUTION:In an exciting device for rotary electric machine provided with an automatic voltage regulating device 14 which controls the output voltage of a rotary electric machine 1 equipped with a rotation exciting device 3 by detecting the deviation of the output voltage of the machine 1 from a reference voltage and outputting a control command which controls the exciting device 3 until the deviation becomes zero, the control command simultaneously controls semiconductor elements 16 and 20 respectively incorporated in the output circuit 3a and excitation circuit 9 of the exciting device 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exciting device having automatic voltage adjusting means for adjusting an output voltage of a rotary electric machine to a reference voltage.

[0002]

2. Description of the Related Art FIG.
FIG. 6 is a block diagram showing a configuration of a conventional excitation device for a rotary electric machine disclosed in Japanese Patent Publication No. In the figure, 1 is a rotary electric machine such as a synchronous generator, 2 is an armature of the rotary electric machine 1, 3 is a rotary exciter consisting of a brushless AC generator, 4 is a main excitation winding, 5a is a positive rectifier element, 5b is a Negative rectifier element, 6 is a fuse, 7 is an AC generator composed of an armature winding 8 and an excitation winding 9, and the armature winding 8 forms a circuit with 4 to 6 in the rotating part of the rotary exciter 3. None Output circuit 3a is formed. 10
Is a permanent magnet generator formed by arranging the permanent magnet 11 in the rotating part and the armature winding 12 in the stationary part, 13 is a voltage transformer for transforming the output voltage Vo of the rotating electric machine 1, and 14 is an automatic voltage regulator , 15 is a thyristor control device, and 16 is a thyristor (semiconductor element).

Next, the operation will be described. A voltage is generated in the armature 12 by the permanent magnet 11 that is directly connected to the rotary exciter 3 and rotates, and the generated voltage excites the exciting winding 9 of the alternating-current generator 7 that serves as an exciting circuit via the thyristor 16 to drive the alternating-current generator 7. An AC voltage is generated in the armature winding 8. The generated AC voltage of the armature winding 8 is rectified by the rectifying elements 5a and 5b through the fuse 6 and then the main excitation winding 4 is excited to generate the voltage Vo in the armature 2 of the rotating electric machine 1. On the other hand, the voltage Vo of the rotary electric machine 1 is transformed by the instrument transformer 13 and given to the automatic voltage regulator 14. The transformed voltage Vo is compared with the reference voltage by the automatic voltage regulator 14, and the thyristor controller 15 controls the thyristor 16 until it becomes equal to control the voltage Vo of the rotary electric machine 1.

[0004]

Since the conventional excitation device for a rotary electric machine is configured as described above, the control of the voltage Vo of the rotary electric machine 1 by the automatic voltage regulator 14 directly controls the main excitation winding 4. However, since the excitation winding 9 of the AC generator 7 is controlled, the response is poor and the control accuracy is poor.

The present invention has been made to solve the above problems, and it is an object of the present invention to obtain an exciting device for a rotating electric machine, which can improve the response of the output voltage of the rotating electric machine and the control accuracy. To aim.

[0006]

According to a first aspect of the present invention, there is provided an exciting device for a rotating electric machine, which detects a deviation between an output voltage of a rotating electric machine having the rotating exciting device and a reference voltage, and the deviation is zero. In the exciter of the rotary electric machine equipped with the automatic voltage adjustment device that controls the voltage of the rotary electric machine by issuing the control command to control the rotary exciter until, the control command is incorporated in the output circuit and the excitation circuit of the rotary exciter, respectively. It simultaneously controls the semiconductor devices.

According to a second aspect of the present invention, there is provided an exciter for a rotary electric machine according to the first aspect, wherein the rotary exciter is formed of a brushless AC generator, the semiconductor element of the output circuit is incorporated in the rotating portion, and the control command is a radio signal. It is a thing.

According to a third aspect of the present invention, there is provided an exciting device for a rotary electric machine according to the first aspect, wherein the rotating exciter is formed by a DC generator and each semiconductor element is a power transistor.

[0009]

In the exciting device of the rotary electric machine according to the present invention, the control command of the automatic voltage adjusting means can be simultaneously issued to the semiconductor element of the output circuit of the rotating exciter to directly control the output voltage of the rotating exciter.

When the rotary excitation device is a brushless AC generator, a control command can be wirelessly issued to a semiconductor element incorporated in the rotating section to control the output voltage of the brushless AC generator.

When the rotary excitation device is a DC generator, the control command can be issued to the power transistor incorporated in the stationary portion of the output circuit to control the output voltage of the DC generator.

[0012]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a block diagram showing the configuration of an exciting device for a rotary electric machine according to a first embodiment of the present invention. In the figure, 1
˜4, 5b, 6˜16 are the same as the conventional one, and the explanation thereof is omitted. Reference numeral 17 is a radio transmitter that wirelessly transmits the output signal of the automatic voltage regulator 14, 18 is a radio receiver that receives the radio of the radio transmitter 17, 19 is a thyristor control device, and 20 is an output circuit of the rotary excitation device 3. Thyristor (semiconductor element).

Next, the operation will be described. A voltage is generated in the armature 12 by the permanent magnet 11 directly connected to the rotary exciter 3, and the generated voltage excites the exciting winding 9 of the AC generator 7 via the thyristor 16 and the armature winding 8 of the AC generator 7. Generate an alternating voltage on. The generated AC voltage of the armature winding 8 passes through the fuse 6 and the thyristor 20 and the rectifying element 5
After rectifying at b, the main excitation winding 4 is excited and the voltage Vo is generated in the armature 2 of the rotary electric machine 1. On the other hand, the voltage Vo of the rotary electric machine 1 is transformed by the instrument transformer 13 and given to the automatic voltage regulator 14. The transformed voltage Vo is compared with the reference voltage, and the thyristor controller 15 controls the thyristor 16 until they become equal. At the same time, the output of the automatic voltage regulator 14 is transmitted from the wireless transmitter 17 in parallel.
The signal is received by the wireless receiver 18, and the thyristor control device 19 controls the thyristor 20 until the voltage Vo becomes equal to the reference voltage as described above. In this way, the main excitation winding 4 of the rotary exciter 3 is directly controlled in addition to the control of the excitation winding 9 of the AC generator 7, so that the control of the output voltage Vo of the rotary electric machine 1 is effectively amplified. Therefore, quick response and highly accurate control are possible.

Example 2. Embodiment 2 of the present invention will be described below with reference to the drawings. Second Embodiment FIG. 2 is a block diagram showing the structure of an exciting device for a rotary electric machine according to a second embodiment of the present invention. In the figure, 1-4, 5b, 6-9, 13, 14, 17-
20 is the same as that of the first embodiment, and the description thereof is omitted. 21
Is a DC power supply device that is an excitation power supply of the rotary excitation device 3;
Is a power transistor (semiconductor element) interposed between the DC power supply device 21 and the excitation winding, and 23 is a power transistor control device.

Next, the operation will be described. The DC voltage supplied from the DC power supply device 21 is supplied to the power transistor 22.
The excitation winding 9 of the AC generator 7 is excited to generate an AC voltage in the armature winding 8. The AC voltage of the armature winding 8 is rectified by the thyristors 20 and 5b through the fuse 6 and then excites the main excitation winding 4 to generate the voltage Vo in the armature 2 of the rotating electric machine 1. On the other hand, the voltage Vo of the rotating electric machine 1
Is transformed by the instrument transformer 13 and the automatic voltage regulator 14
Given to. The transformed voltage Vo is compared with the reference voltage, and the power transistor 22 is controlled by the power transistor control device 23 until they become equal. At the same time, in parallel, the output of the automatic voltage regulator 14 is transmitted by the wireless transmitter 17, the signal is received by the wireless receiver 18, and the thyristor controller 19 controls the thyristor 20.
Since the voltage Vo of the rotary electric machine 1 is adjusted, the same effect as that of the first embodiment can be obtained.

Embodiment 3. The third embodiment of the present invention will be described below with reference to the drawings. Third Embodiment FIG. 3 is a block diagram showing the structure of an exciting device for a rotary electric machine according to a third embodiment of the present invention. In the figure, reference numerals 1, 2, 4, 13, 14, 21 to 23 are the same as those in the second embodiment, and the description thereof is omitted. 24 is a DC generator having an armature winding 25 and an excitation winding 26, and 27
Is a collector ring interposed between the output circuit of the DC generator and the main excitation winding, 28 is a power transistor (semiconductor element) incorporated in the output circuit, and 29 is a power transistor control device for controlling the power transistor 28.

Next, the operation will be described. The DC voltage supplied from the DC power supply device 21 is supplied to the power transistor 22.
The excitation winding 26 of the DC generator 24 is excited by the control by the above, and the DC voltage which is the output of the DC generator 24 is generated from the armature winding 25 through a commutator and a brush (not shown). The direct-current voltage of the direct-current generator 24 is controlled by the power transistor 28 as will be described later, and then excites the main excitation winding 4 through the current collector ring 27 to cause the armature 2 of the rotary electric machine 1 to generate the voltage Vo. On the other hand, the voltage Vo of the rotary electric machine 1 is transformed by the instrument transformer 13 and given to the automatic voltage regulator 14.
The transformed voltage Vo is compared with the reference voltage, and the power transistor 22 is controlled by the power transistor control device 23 until they become equal. At the same time, in parallel, the output of the automatic voltage regulator 14 controls the power transistor 28 by the power transistor controller 29 to regulate the voltage Vo of the rotating electric machine 1, and the same effect as that of the first embodiment can be obtained.

[0018]

As described above, according to the first aspect of the present invention, the deviation between the output voltage and the reference voltage of the rotary electric machine having the rotary exciting device is detected, and the rotary excitation is performed until the deviation becomes zero. In an exciting device of a rotating electric machine equipped with an automatic voltage adjusting device for issuing a control command for controlling the device and controlling the voltage of the rotating electric machine, the control command is the output circuit of the rotating exciting device and the semiconductor elements incorporated in the exciting circuit at the same time. Since the control is performed, there is an effect that the exciting device of the rotating electric machine that can improve the control response and the control accuracy can be obtained.

According to a second aspect of the present invention, in the first aspect, the rotary excitation device is formed of a brushless AC generator, the semiconductor element of the output circuit is incorporated in the rotating portion, and the control command is transmitted by a radio signal. Therefore, it is possible to obtain an exciting device for a rotating electric machine, which can improve control response and control accuracy.

According to a third aspect of the present invention, in the first aspect, since the rotary exciter is formed by a DC generator and each semiconductor element is a power transistor, the control response is improved and the control accuracy is also improved. There is an effect that an exciting device for a rotating electric machine can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exciting device for a rotary electric machine according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an exciting device for a rotary electric machine according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of an exciting device for a rotary electric machine according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a conventional excitation device for a rotary electric machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary electric machine 3 rotary excitation device (brushless AC generator) 3a output circuit 4 main excitation winding 7 AC generator 9 excitation winding 14 automatic voltage regulator 15 thyristor control device 16 thyristor (semiconductor element) 17 wireless transmitter 18 wireless Receiver 19 Thyristor control device 20 Thyristor (semiconductor element) 21 DC power supply device 22 Power transistor (semiconductor element) 23 Power transistor control device 24 DC generator 26 Excitation winding 28 Power transistor (semiconductor element) 29 Power transistor control device

Claims (3)

[Claims] 1. A deviation between an output voltage of a rotating electric machine having a rotation exciting device and a reference voltage is detected, and a control command for controlling the rotating exciting device is issued until the deviation becomes zero. In an exciting device of a rotating electric machine provided with an automatic voltage adjusting device for voltage control, the control command simultaneously controls the output circuit of the rotating exciting device and the semiconductor elements incorporated in the exciting circuit, respectively. Exciter. 2. The exciter for a rotary electric machine according to claim 1, wherein the rotary exciter is formed of a brushless AC generator, the semiconductor element of the output circuit is incorporated in the rotating portion, and the control command is a radio signal. 3. The exciter for a rotary electric machine according to claim 1, wherein the rotary exciter is formed of a direct current generator, and each semiconductor element is a power transistor.