JPS625682Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a synchro amplifier that can amplify the output of a synchro oscillator or convert the power frequency of a synchro oscillator, and has no moving parts, so it has a fast response, is small and lightweight. The present invention aims to provide a synchro amplifier with high performance and high reliability.

For example, the output (angle signal) of a gyro compass is generally transmitted from a synchro transmitter (either a control synchro or a torque synchro). Synchro transmitters used in things like gyro compasses are highly accurate, so their capacity is small, and it is not possible to connect many loads directly. For this reason, the output of the synchro oscillator is generally amplified by a synchro amplifier, and the amplified output is used to drive many loads. Furthermore, synchro transmitters used in gyrocompasses and the like often have a power frequency of 400Hz. In contrast, commonly used torque synchro receivers are 60Hz.
Normally it works with . Synchro amplifiers are also used for the purpose of converting the power supply frequency in this way.

FIG. 1 shows a conventional synchro amplifier. 1 in the diagram
shows the entire synchro amplifier, and its configuration includes a control synchro receiver 2, an amplifier 3 that amplifies the output voltage of the rotor winding of this synchro receiver 2, and a servo motor 4 driven by this amplifier 3. ,
It is composed of an output torque synchro transmitter 5, and a gear mechanism 6 that connects the synchro receiver 2, the servo motor 4, and the rotor of each of the output torque synchro transmitter 5. A frequency generator 7 is attached to the servo motor 4 to generate a voltage proportional to the rotation speed of the servo motor 4 and feed back the voltage signal to the input side of the amplifier 3 to improve damping. This point is similar to the configuration generally used in servo amplifiers and the like. Further, the servo motor 4 and the frequency generator 7 each have excitation windings 4a and 7a, and the excitation winding 4a
and 7a, a signal having the same frequency as the signal received by the synchro receiver 2 is supplied from the power source 8, and the servo motor 4 and the frequency generator 7 are excited with the signal having the same frequency as the received frequency.

The stator winding of the synchronous receiver 2 is connected to the input terminal 9
The rotor windings of the output torque synchro transmitter 5 are connected to the rotor terminals _R1 ,
R ₂ and the stator winding is connected to the output terminals 10a, 1
Connects to ports 0b and 10c.

In such a configuration, the input terminals 9a, 9b,
For example, the stator output signal of the control synchro transmitter 11 on the gyro compass side is supplied to 9c. Therefore, a 400 Hz angle signal is supplied from the synchro transmitter 11 to the input terminals 9a, 9b, and 9c. As is well known, when the rotational angular position of the synchro transmitter 11 and the rotational angular position of the receiver 2 match, the receiver 2
The output of the rotor winding is zero. On the other hand, if a slight deviation occurs in the rotational angular position, a signal proportional to the amount of deviation and having a phase in the direction of the deviation is generated in the rotor winding of the receiver 2, and this signal is amplified by the amplifier 3. and is supplied to the servo motor 4. The servo motor 4 rotates the rotor of the receiver 2 in a direction that corrects the rotational angular position deviation with respect to the synchro transmitter 11, so that the rotational angular position of the receiver 2 matches the transmitter 11.
When it catches up with that, the servo motor 4 stops.
Therefore, the output torque synchro transmitter 5 outputs an angle signal equal to the rotation amount of the synchro transmitter 11 on the gyro compass side to the output terminals 10a, 10b, and 10c. If you want the frequency of this output angle signal to be 60Hz, set the output torque synchro transmitter 5 to 60Hz.
Use one for Hz, and also connect rotor terminal _R1 and
Just supply R ₂ with a 60Hz power supply voltage.

In this way, in the conventional system, the output torque synchro transmitter 5 having a large capacity is driven by the servo motor 4, and the output of the synchro transmitter 11 on the signal source side is amplified, which has the drawback of poor response. Furthermore, since the synchro receiver 2, the servo motor 4, the frequency generator 7, the output torque synchro transmitter 5, the gear mechanism 6, etc. are built in, the structure becomes heavy and large. It also has the disadvantage of being expensive. Furthermore, regular maintenance and inspections are required. There are limits to accuracy and controllability, and it is extremely difficult to design for high precision and good controllability. If the input and output frequency specifications change, internal parts such as the synchro receiver 2, transmitter 5, servo motor 4, frequency generator 7, etc. must be replaced, which is uneconomical. There are various disadvantages such as.

The purpose of this invention is to provide a synchro amplifier that has a quick response, can be made small and lightweight, and has excellent precision and controllability.

This device is configured to synchronously rectify an input signal, convert it to DC, and then multiply the DC signal by a frequency signal on the output side and output the result.

An embodiment of this invention will be described below in detail with reference to the drawings.

FIG. 2 shows an embodiment of this invention. In FIG. 2, parts corresponding to those in FIG. 1 will be described with the same reference numerals, but in this invention
The output signals sinΘsin2πft, sin(Θ−
2π/3) sin2πft, sin(Θ+2π/3) sin2πft(
However, f is the power supply frequency of synchro 11, and Θ is synchro 11
angle) are connected to the synchronous rectifier circuits 13a, 13b, 13c through the isolation transformer 12 as necessary.
This synchronous rectifier circuit 13a, 13b, 1
The angle signal is synchronously rectified at 3c. The reference signal for synchronous rectification is the power supply signal sin2πft given to the rotor winding of the synchronized oscillator 11 at the input terminal 9.
The signal is supplied from d-9e to each synchronous rectifier circuit 13a, 13b, 13c through an input transformer 14. The outputs of the synchronous rectifier circuits 13a, 13b, and 13c are DC signals sin having magnitudes and polarities corresponding to the angular positions.
Θ, sin (Θ−2π/3), and sin (Θ+2π/3) are obtained. This DC signal is applied to analog multipliers 15a and 15.
b, 15c, and the multipliers 15a, 15
b, 15c, the signal sin2 of the frequency required on the output side
Multiply πgt and add sinΘsin2πgt, sin to the output side
(Θ−2π/3) sin2πgt, sin (Θ+2π/3) sin2
Get πgt. This signal is transmitted to amplifiers 15a, 15b, 15c.
If the signals are amplified at the respective output terminals 10a, 10b, and 10c via the output transformer 17 and transmitted from the output terminals 10a, 10b, and 10c, a synchronizer operating at the frequency g can be driven. Therefore, for example, even if the synchro transmitter 11 on the gyro compass side is a 400Hz system, the multiplication circuit 1
If the frequency g to be multiplied by 5a, 15b, and 15c is, for example, 60 Hz, then a synchro receiver operating at 60 Hz can be driven as a load. Note that R ₁ and R ₂ indicate input terminals for inputting the power signal sin2πgt for multiplication, and 18 indicates an input transformer for insulation.

As mentioned above, this invention uses an electronic circuit to amplify the signal transmitted by the synchro transmitter 11 and converts the frequency, so there are no moving parts and the response speed is faster than that of a conventional synchro amplifier. The speed is so high that it does not Also, since there are no moving parts, it is highly reliable. Furthermore, it can be easily made smaller and lighter, and can be manufactured at a lower cost. Also, since there are no moving parts and no servo system is used, there is no servo vibration that is seen in servo systems. Furthermore, there are various advantages such as the ability to use the same device regardless of the input frequency and output frequency.

3 to 6 show other embodiments of this invention.

In the example shown in FIG. 3, the resolver signal is amplified by using a Scott transformer that converts 2-phase to 3-phase or 3-phase to 2-phase as the isolation input transformer 12,
A case is shown in which the configuration is configured to drive a synchro receiver.

The example shown in FIG. 4 shows a configuration in which a Scott transformer is used as the insulating output transformer 17 to convert a synchronized signal into a resolver signal, and the resolver can be driven by the synchronized signal.

The example shown in FIG. 5 shows a case where both the input transformer 12 and the output transformer 17 are converted into Scott transformers to form a resolver amplifier. In this case, the synchronous rectifier circuit, analog multiplier and amplifier are respectively 13a-13b, 15a-15b, 16a-
Two sets each of 16b are sufficient.

Even in the case of a synchronous amplifier, if the input transformer 12 and output transformer 17 are connected as shown in FIG. 6, two sets each of the synchronous rectifier circuit, analog multiplier, and amplifier can be used.

[Brief explanation of drawings]

Fig. 1 is a system diagram for explaining a conventional synchro amplifier, Fig. 2 is a system diagram showing one embodiment of the synchro amplifier according to this invention, and Figs. 3 to 6 show other embodiments of this invention. FIG. 11: Synchro transmitter as a signal source, 13
a, 13b, 13c: synchronous rectifier circuit, 15a, 1
5b, 15c: Analog multiplier.

Claims (1)

[Scope of utility model registration request] A synchro amplifier comprising a synchronous rectifier circuit that synchronously rectifies the signals obtained from the stator windings of the synchronizer on the signal source side, and an analog multiplier that multiplies the rectified output of the synchronous rectifier circuit by the power supply waveform on the load side.