JPS59153450A - Constant frequency ac generating apparatus - Google Patents

Abstract

PURPOSE:To produce AC power of the prescribed frequency irrespective of the rotating speed of a drive machine by composing of the first generator excited by a basic frequency input and the second generator operated in reverse phase to the output of the first generator. CONSTITUTION:The first generator A has a stator coil 1 and a rotor coil 2, and a basic frequency input is supplied from a basic frequency generator to the coil 1. The second generator B supplies power to various loads, and the rotor coil 3 is connected to apply AC from the coil 2 to the first generator A. Rotor coils 2, 3 are composed to become in reverse phase. The coils 2, 3 of the generators A, B are periodically rotated by a drive source D which can vary its rotating speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a constant frequency alternating current power generator which is capable of producing an alternating current output at a constant frequency regardless of fluctuations in the rotational speed of a drive source.

In general, in an alternator that performs power generation operation by rotational drive, the following relationship exists between the output frequency fcH2) and the rotational speed nc, rpm).

20 Here, since the number of poles in the generator is a constant determined in advance at the time of design, the output frequency f is immediately affected by the □- coefficient of the rotation speed.

For this reason, it is important to always drive the alternator at a constant rotational speed, especially when operating the alternator to generate electricity.

However, when operating the generator at full rotation, the engine rotational speed may change significantly due to fluctuations in the load applied to the output, or when the engine is used as a rotational drive source and the engine also drives other rotational loads. There are things to do. As a result, not only the output voltage of the alternating current generator that is driven to rotate, but especially the frequency of the alternating current output is not constant, and the rotational operation of the synchronous machine, such as a motor, connected as a load may be significantly distorted. There were often situations where it became impossible.

The present invention was developed in view of the above-mentioned disadvantages, and its purpose is to provide a power generation device that can always obtain an AC output with a constant frequency even when the driving rotation speed fluctuates. This is what we do.

Hereinafter, the F1 embodiment of the present invention will be specifically described in detail.

Figure 1 is a diagram showing the basic configuration of the present invention.
1: In the primary generator, this primary generator coil 1
and a rotor coil 2, and the stator coil 1 is supplied with a fundamental frequency input from a fundamental frequency generator (not shown). B is a secondary generator that supplies power to various loads (not shown), and the rotor coil 3 of the secondary generator B is connected to the rotor coil 2 of the primary generator A. Both the primary and secondary generators A are connected so that an alternating current of
, B's rotor coils 2 and 3 are rotated synchronously by a drive source whose rotational speed may fluctuate. 3
(Fig.) are designed to rotate in opposite directions, or if they are rotated in the same direction, the winding direction of either rotor coil 2 or rotor coil 3 must be changed so that the phase rotations are opposite to each other, or the lead By changing the connection of the tags, the rotor coils 2 and 3 are configured to have opposite phases. In this case, the rotor 2a. 3a can be rotationally driven in the same direction with the same rotation axis. Note that the stator coil 1 above.

4 and the number of poles of each of the rotor coils 2 and 3 are set in advance to a predetermined number by design.

Next, to explain the operation of the power generating apparatus of the present invention configured as described above, an input having a fundamental frequency f] from a fundamental frequency generator (not shown) is applied to the stator coil 1 of the generator A. When a rotating magnetic field of V is generated in the stator coil 1, and the rotor 2a is rotationally driven in this magnetic field by a driver with a rotation speed n, the rotor coil 2 has a Next frequency I
'f force with n is generated.

[Here, Pl is the number of poles of the rotor 2ar and the rotor 3a.] 1IPl fn=fl+--- 20 The output generated by the generator A and having the frequency fnk is applied to the rotor coil 3 of the generator B. Therefore, the rotor 30 around which the rotor coil 3 is wound rotates on the same rotation axis as the rotor 2σ of the generator A, at the same rotation speed n, and has an opposite phase. Therefore, the stator 4a of the generator B has a frequency As the difference between the rotating magnetic field due to fn and the rotational speed n of the driving machine, electric power having a frequency f2 expressed by the following equation is generated.

1IP1 f 2 = f n − □゛−f 1 Therefore, the generator A. An AC output having the same frequency as the fundamental frequency 11 can be obtained regardless of the rotational speed n of the driving machine that performs E'Z rotation.

As described above, according to the present invention, the generator is configured by a primary generator that is excited by the fundamental frequency input, and a secondary generator that operates in opposite phase based on the output of the primary generator. ,
It is possible to extract alternating current power at a constant frequency regardless of the rotation speed of the drive machine.For example, it is possible to extract AC power at a constant frequency regardless of the rotation speed of the drive machine. AC power with a constant frequency that is faithful to the fundamental frequency input can be generated even when the rotation speed of the drive machine fluctuates due to changes in the electrical load connected to the output side. As a result, it is possible to stably operate equipment using an AC rotating machine as a load, fluorescent light, computers, etc.

[Brief explanation of drawings]

FIG. 1 is a basic configuration diagram for explaining the operation of the device of the present invention, and FIG. 2 is a sectional view of the device of the present invention shown in FIG. A...Primary generator B...Secondary generator 1.4
...Stator coils Ia, 4a...Stator D...Driver 5...Rotating shaft Patent applicant front 1) Hiroshi, patent attorney, Iwao Sugimoto, patent attorney, Katsunori Sugimoto

Claims (1)

[Claims] (1) A primary generator excited by the fundamental frequency input, a secondary generator to which the output of the primary generator is applied and operates in opposite phase to the primary generator, and a secondary generator that operates in opposite phase to the primary generator. A constant frequency generator, characterized in that the rotors of the primary generator and the secondary generator are rotated by the same drive machine to generate an alternating current output with a constant frequency based on a fundamental frequency input. AC generator.