KR910008511Y1 - Ziro moter power signal generator - Google Patents

Abstract

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Description

Gyro Power Supply Signal Generator

1 is a conventional circuit diagram.

2 is a circuit diagram of the present invention.

3 and 4 are operational waveform diagrams of the present invention.

* Explanation of symbols for main parts of the drawings

10: oscillation unit 20: switching unit

30: transformer 40: timer

50: relay 60: gyro

100: voltage regulator Q1, Q2: FET

D1-D5: Diode COM, COM2: Comparator

R1-R15: Resistor C1-C4: Capacitor

The present invention relates to a measuring device, and more particularly to a gyro drive power signal generation circuit.

Gyro refers to a device that uses angular momentum to detect angular motion based on an inertial space around one or more axes orthogonal to the spin side.

In general, 400 필요한 needed to drive the gyro may be a sine wave or a rectangular pulse. In the conventional case, the rectangular pulse generator circuit is configured as shown in FIG. 1 and operated as follows. .

That is, when an unstable multivibrator (# 555: U1) generates 800 kV output, the CMOS D Flip Flop 4013 (U2) inputs the 800 kV output generates 400 kV output. Generated and amplified in a class B push pull Amp consisting of two transistors (2N 2222: Q1, 2N 2907: Q2) The voltage supplied to the primary side of the transistor was maintained at a constant level by a voltage regulator to supply power to the gyro connected to the secondary side of the transistor.

However, in the case of the configuration and operation as described above, the number of integrated circuits (ICs) increases, resulting in not only the space occupied by the circuits but also the stability of the load.

In addition, since the excitation time is long, it takes a long time to reach a steady state operation, and there is a problem that distortion occurs in the output waveform.

Accordingly, an object of the present invention is to provide a simplified gyro driving power supply circuit to prevent distortion of an output.

Hereinafter, with reference to the accompanying drawings of the present invention.

FIG. 2 is a circuit diagram of an embodiment of the present invention, and includes an gyro 60, a timer 40, an oscillator 10 for inputting a first power source V1 to output a 400 kW drive power signal, and the oscillator First and second field effect transistors (hereinafter referred to as FETs) Q1 and Q2 having their gates focused on the first output terminal 11 and the second output terminal 12 of (10), respectively; Gyro 60 of the gyro 60 under the control of the timer 40 and the switching unit 20 composed of diodes D1 and D2 connected between the drain D and source S of the FETs Q1 and Q2, respectively. One end of the primary side is connected to the relay 50 for selecting the power input to the spin motor terminal 5 and the drain D of the first transistor Q1, and the drain D of the second transistor Q2. ) Is connected to the other end of the primary side, and the first and second tap terminals a and b on the secondary side are connected to the relay 50, and the third and fourth tap terminals c and d are grounded, and 5-tap terminal (e) Thus, a feedback voltage is input from the transformer 30 connected to the pick-off terminal 7 of the furnace 60 and the fifth tap terminal e on the secondary side of the transformer 20 to be compared with the third power supply V3. As a result, the voltage regulator 100 includes a voltage regulator 100 that adjusts the second power source V2 to apply a constant power source to the primary width of the transformer 30.

Based on the above-described configuration will be described an embodiment of the present invention in detail.

In the embodiment of the present invention described below, 15V is used as the first power supply and 28V is used as the second power supply.

The oscillator 10 of FIG. 2 inputs a DC voltage of 15V to oscillate a 400 kHz signal to generate power for driving the gyro 60.

The reason for supplying the input voltage applied at 15 volts is to obtain sufficient power to drive the gyro 60 than when applying 5 volts or 10 volts.

In addition, in an embodiment of the present invention, the oscillator 10 uses a CD4047, which is a CMOS low power astable multivibrator.

On the other hand, the period of the output signal of the oscillator 10 is shown in FIGs. 3A through 3B by the values of the resistors R and capacitors C connected to the first to third output terminals 11, 13, and 12. It is determined as follows.

At this time, the output signal period tA of the third output terminal of (3c) can be expressed by the following equation (1).

Therefore, when t1, t2 and tA values are calculated based on the above formula (1), the following formulas (2) to (5) are obtained.

In this case, the first and third output terminals 11, 13, and 12 are connected to the gates 6 of the first and second FETs Q1 and Q2, respectively, to control the two FETs Q1 and Q2 to perform a switching operation. .

At this time, a pulse of about three times the power supply voltage is generated when the two FETs Q1 and Q2 are turned on and off, which is a diode connected between each of the drains D and the source S of the two FETs Q1 and Q2. It is removed by (D1, D2).

By the on / off operation of the two FETs Q1 and Q2, a 28-volt regulated voltage supplied to the primary side of the transformer 30 oscillates.

At this time, the electric power induced from the primary side to the secondary side of the transformer 30 is the final power signal supplied to the gyro 60, which is 52 V, 400 의 of the first side tap (a) and the first tap (b). The 26V 400 kHz is supplied to the Spin Motor terminal 5 of the gyro 60 which has passed through the relay 50, and the 26v 400 kHz signal of the fifth step (e) is pick-off of the seat 60. Pick off) is supplied to the terminal (7).

At this time, the relay 50 is operated under the control of the timer 40. When the power is supplied, the 52V 400 Hz signal is supplied for the first 2.5 seconds, and when the spin motor enters the normal state after 2.5 seconds, the timer 40 The relay 50 is connected to the second tap terminal b, which is 26V 400 kV.

In this case, the filtration time of the gyro 60 can be minimized to quickly obtain a steady state operation.

In addition, a voltage regulation feedback circuit must be added to supply the stable bias voltage required by the gyro 60.

Therefore, when the 26V 400 kHz signal supplied to the pick-off terminal 7 of the gyro 60 is fed back to the voltage regulator 100 in FIG. 2, the negative input is negative to the inverting input terminal (-) of the first comparator COM1. When the signal is input, the output is dropped by the fifth diode D5 and the resistor R13 connected between the inverting input terminal (−) and the output terminal.

Thus, the first comparator COM1 outputs a rectangular pulse as shown in FIG. 4A.

The output of the first comparator COM1 is applied to the inverting input terminal (-) of the second comparator COM2 through the resistor R15 and is supplied to the non-inverting terminal (+) of the second comparator COM2. It is compared with the 3rd power supply V3.

Here, assuming that the third power supply is 10V, the two resistors R7 and R8 are 20 kV and the resistor R9 is 5.62 kV, the reference voltage is about 5.6V.

Therefore, as a result of the comparison, when the output of the first comparator COM1 is greater than the reference voltage level (5.6V), the output signal becomes a signal having a negative value, and when it is small, a signal having a positive value.

Therefore, when the output of the second comparator COM2 becomes a negative signal, the current 1b flowing through the resistor R5 increases and the current ic bypassed through the resistor R4 decreases to decrease the voltage Va. Is lowered.

On the contrary, when the output of the second comparator COM2 becomes a negative signal, the current ib increases and the current ic decreases, thereby lowering the voltage Va.

Therefore, the bias voltage V _X of the transformer 30 is lowered.

Therefore, the bias voltage Vx of the transformer 30 is lowered.

In addition, when the output of the second comparator COM2 becomes a positive signal, the current ib decreases and the current ic increases to increase the voltage Va.

Therefore, the bias voltage V _X of the transformer 30 becomes high.

By the configuration and operation as described above, the output characteristics are not only improved, but the circuit is simple, the volume is small, and the excitation time can be greatly reduced.

Claims (1)

In the gyro 60 driving power signal generation circuit including the voltage regulator 100 and the switching unit 20, an oscillator for converting an input voltage into a power signal having a predetermined frequency and outputting the power signal to the switching unit 20. And a regulated voltage supplied to the primary side under the control of the voltage regulator 100 according to the on / off state of the switching unit 20 and the oscillation signal is supplied to the secondary side. Transformer 30 is connected to the pick-off terminal of the gyro (60) while being induced to generate a predetermined power to each tap terminal (ae) and the fifth tap terminal (e) is connected to one end of the voltage regulator (100) ), A timer 40 for counting a predetermined time, and a second or first tap terminal (a, b) of the transformer 30 under the control of the timer 40 to select the gyro 60. Consisting of a relay (50) connected to the spin motor terminal (5) A circuit as ranging.