JP2002119087A - Driving method of sync receiver - Google Patents

Abstract

(57) Abstract: An object of the present invention is to prevent a transient current of a drive signal from being generated by increasing an output impedance on an output side of a power operational amplifier. SOLUTION: The synchronization receiver driving method according to the present invention increases the output impedance of the output side of each power operational amplifier (2, 3) and suppresses the generation of the transient current of each driving signal (2A, 3A), thereby reducing the torque. This is a method to obtain the normal operation of the synchro (4).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a sync receiver, and more particularly, to increasing the output impedance of the output side of each power operational amplifier so that the angle difference between each angle indicating signal and the current angle of the torque sync is large. The present invention relates to a novel improvement for suppressing a transient current flowing in each drive signal in the case of and obtaining smooth rotation of the torque synchro.

[0002]

2. Description of the Related Art In a conventional method of driving a synchro-receiver, a plurality of angle instruction signals are input from an angle instruction unit to first and second power operational amplifiers and output from each power operational amplifier. Each drive signal was supplied to the stator winding of the synchro winding of the torque synchro to rotate the rotor.

[0003]

The conventional method of driving a synchro-receiver has the following problems because it has been configured as described above. That is, since the output impedance of the output side of each power operational amplifier is low, if the angle difference between each angle instruction signal input to each power operational amplifier and the current angle of the torque sync is larger than a predetermined level, the figure As shown in 3, the magnitude of the current flowing transiently becomes large, the fuse in the device may be blown, and the torque synchro may not be able to rotate. Further, if the current limiting function of the power operational amplifier itself is used when the angle difference is large, the drive signal is repeatedly turned on / off, so that the drive current does not flow and the torque synchro does not operate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, by increasing the output impedance of the output side of each power operational amplifier, the angle between each angle instruction signal and the current angle of the torque synchro is adjusted. It is an object of the present invention to provide a synchro-receiver driving method that suppresses a transient current flowing in each drive signal when a large angle difference is generated, and obtains a smooth rotation of a torque synchro.

[0005]

A method for driving a synchro receiver according to the present invention comprises the steps of: inputting a plurality of angle instruction signals from an angle instruction section to first and second power operational amplifiers; The first and second drive signals are supplied to a synchro winding of a torque synchro, and the torque synchro is driven. In the synchro receiver driving method, the resistor provided on the output side of each of the power operational amplifiers includes This is a method of increasing the output impedance on the output side and suppressing the generation of the transient current of each drive signal.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a synchro-receiver driving method according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 designates an angle indicating section for generating first and second angle indicating signals 1a and 1b for indicating the rotation angle of a rotor (not shown) of the torque synchro 4. Each angle instruction signal 1a, 1b is the first,
The second power operational amplifiers 2 and 3 are configured to be input to the negative terminals 2a and 3a.

The positive terminal 2 of each of the power operational amplifiers 2 and 3
b, 3b are each grounded and each output terminal 2
c and 3c include resistors R1 and R2 having a predetermined resistance value.
Are connected in series, and these resistors R1 and R2 are connected to a stator winding 5 in a synchro winding of a torque synchro 4, which is a synchro receiver. An excitation power supply 7 is connected to a rotor winding 6 in the synchro winding of the torque synchro 4.

Next, the operation will be described. First, FIG.
When the first and second angle indicating signals 1a and 1b having the angles of sin (θ + α) and sin (θ + β) are input to the negative terminals 2a and 3a of the power operational amplifiers 2 and 3, in each state, the power operational amplifiers 2 and 3 Since the output impedances of the output terminals 2c and 3c are increased, the angle difference between the angles of the angle instruction signals 1a and 1b and the current angle (rotor angle position) of the torque synchro 4 is large. In this case, the first and second drive signals 2A and 3A output from the output terminals 2c and 3c have output currents far more than the transient currents shown in FIG. 3, as shown in the waveform diagram of FIG. The output current becomes a flat state at a low level and without a sharp peak value. Therefore, the levels of the drive signals 2A, 3A applied to the stator winding 5 are stable, and the angle instruction signals 1a, 1b
Accurate rotor rotation along the axis can be obtained. In addition,
The stator side and the rotor side are relative, and can be reversed from the above-described embodiment.

[0009]

The method of driving a synchro-receiver according to the present invention is configured as described above, so that the following effects can be obtained. That is, since the output impedance of the output side of each power operational amplifier to which the angle instruction signal is input is increased, it is possible to suppress the generation of the transient current of the drive signal output from each power operational amplifier, and to reduce the transient current that has conventionally occurred. It is possible to prevent a malfunction of the torque synchro due to a fuse jump due to a current and a drive signal failure.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a method for driving a synchro receiver according to the present invention.

FIG. 2 is a waveform diagram showing a current of a drive signal of FIG.

FIG. 3 is a waveform diagram showing a current of a conventional drive signal.

[Description of Signs] 1 Angle indicating section 1a, 1b Angle indicating signal 2, 3 First, second power operational amplifier 2A, 3A First, second drive signal 4 Torque synchro R1, R2 Resistor

Claims (1)

[Claims] 1. A plurality of angle indicating signals (1a, 1b) from an angle indicating section (1) are input to first and second power operational amplifiers (2, 3), and the first and second power operational amplifiers (2, 3) are inputted. The first from 3),
In the synchro-receiver driving method in which the second drive signal (2A, 3A) is supplied to the synchro winding (5) of the torque synchro (4) to drive the torque synchro (4), the power operational amplifiers ( Synchronous reception characterized in that resistors (R1, R2) provided on the output side of (2, 3) increase output impedance on the output side and suppress generation of transient current of each of the drive signals (2A, 3A). Machine driving method.