JPH0763562A - Gyroscope driving power source - Google Patents

Abstract

PURPOSE:To shorten the rotation raising time at start and reduce the power consumption by sweep-controlling the frequency of an inverter output from a low frequency to a frequency for steadily driving a gyroscope by a sweep circuit. CONSTITUTION:In a sweep circuit 10, a power on reset circuit 11 outputs a reset signal S1 to a down counter 12 according to an power source input. The down counter 12 receives a counting clock CLK0 from an oscillating circuit 13, and starts down count by the signal S1. A programmable frequency divider 14 divides the clock signal CLK1 of a prescribed frequency inputted from the circuit 14 on the basis of the count data D1 inputted from the down counter 12. The resulting timing signal S2 is outputted to an inverter 4 and a control circuit 6 through a control circuit 15. Therefore, the synchronous rectifying circuit of the circuit 6 is synchronously operated with a switching element by the signal S2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gyroscope driving power supply for driving a gyroscope, and more particularly to a gyroscope driving power supply for reducing the rotation rise time and power consumption when starting up the gyroscope. .

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional gyroscope driving power source. In the figure, 1 is a commercial power supply of 100 VAC, 2 is a rectifying / smoothing circuit, 3 is a stabilizing power supply circuit,
The desired DC voltage obtained by the rectifying / smoothing circuit 2 is set to DC without fluctuation.
The voltage is supplied to the inverter 4.

The inverter 4 alternately turns on / off the DC voltage of the stabilized power supply circuit 3 to the primary winding of the transformer by means of two switching elements, and applies it to the secondary winding of the transformer to form a square wave having a positive / negative symmetrical waveform. Get the voltage. Generally 100
A voltage of VAC / 333H _Z is obtained.

The inverter 4 is 100 VAC / 333H
_Z is supplied to the gyroscope (not shown) in the ball sphere 51 provided in the master compass 5, and the gyroscope is rotated at about 20,000 RPM. A control circuit 6 controls the container 52 so as to follow the rolling balls 51, and drives the containers 52 based on a deviation voltage obtained from the deviation between the rolling balls 51 and the container 52. The deviation voltage is synchronously rectified by the synchronous rectification circuit 61 in synchronization with the operation of the switching element of the inverter 4, and then the CPU 62 performs a follow-up calculation. In the master compass 5, the synchro motor 53 is rotated based on the result of this follow-up calculation, and the true north direction is obtained.

[0005]

Such a conventional gyroscope driving power source always has a gyroscope of 1
To is driven at a constant frequency of 00VAC / 333H _Z, as shown in FIG. 6, it has a long time to optimum stable high-speed rotation from the startup load on the motor to rotate while sliding the meantime However, there is a drawback that power consumption is increased.

[0006] The present invention has been made in view of these points, obtained by the low frequency of several H _Z the frequency of the inverter output to sweep control to 333h _Z for driving the gyroscopes, startup It is an object of the present invention to provide a gyroscope driving power source capable of shortening the rotation rise time and power consumption.

[0007]

In order to achieve the above object, the present invention turns on / off a direct current voltage obtained by rectifying and smoothing alternating current power in a primary winding of a transformer by two switching elements. In a gyroscope drive power source that drives a gyroscope by a square wave voltage of a positive / negative symmetrical waveform generated in a secondary winding of a transformer that is turned off and applied, a sweep that arbitrarily changes the interval for turning on / off the switching element Circuit is provided, and the on / off cycle of the switching element is controlled to be shortened stepwise by this sweep circuit, and the square wave voltage obtained in the secondary winding is swept controlled from a low frequency to a predetermined drive frequency. I am trying.
In addition, a DC voltage obtained by rectifying and smoothing AC power is applied to the primary winding of the transformer by alternately turning on and off by two switching elements, and a square waveform with positive and negative symmetry generated in the secondary winding of the transformer. In a gyroscope driving power source for driving a gyroscope in a rolling ball by a wave voltage, a timing signal for sweeping and controlling the square wave voltage from a low frequency to a predetermined driving frequency is given to the switching element, and the rolling ball and the container are provided. And a timing signal generating means for synchronously rectifying a deviation voltage based on the deviation between the switching element and ON / OFF of the switching element.

[0008]

Operation: The sweep circuit is a programmable frequency divider 333H
_{The Z} clock signal is frequency-divided based on the count data input from the down counter, and the obtained timing signal is output to the inverter and the control circuit. The timing generating means applies a timing signal for controlling the sweeping of the square wave voltage from a low frequency to a predetermined driving frequency to the switching element, and a control circuit for synchronously rectifying the deviation voltage based on the deviation between the rolling ball and the container of the switching element. Give in synchronization with on / off.

[0009]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of a main part of a gyroscope driving power source of the present invention. In the figure, components having the same functions as those in FIG. The same applies to the drawings below. Reference numeral 10 denotes a sweep circuit that arbitrarily changes the ON / OFF interval of the switching element of the inverter 4. In the sweep circuit 10, 11
Is a power-on reset circuit, which outputs a reset signal S ₁ to the down counter 12 when the power is turned on. The down counter 12 receives the counting clock CLK ₀ from the oscillator circuit 13, and the power-on reset circuit 1
A down count is started by the reset signal S ₁ input from ₁ .

Reference numeral 14 denotes a programmable frequency divider, which is a clock signal CL of 333H _Z input from the oscillation circuit 13.
The frequency of K ₁ is divided based on the count data D ₁ input from the down counter 12, and the obtained timing signal S ₂ is output to the inverter 4 and the control circuit 6 via the control circuit 15. Therefore, the synchronous rectification circuit 61 of the control circuit 6
Will operate in synchronization with the switching element by the timing signal S ₂ .

2A and 2B are time charts for explaining the operation of the gyroscope driving power source of the present invention. FIG. 2A is a clock signal CLK ₀ , FIG. 2B is a reset signal S ₁ , and FIG. (D) shows the output of the programmable frequency divider.

(1) The down counter 12 includes an oscillator circuit 1
3 outputs the counting clock CLK ₀ . (2) When the reset signal S ₁ is input from the power-on reset circuit 11 to the down counter 12, the down counter 1
2 starts counting down and outputs the count data D ₁ to the programmable frequency divider 14. (3) The programmable frequency divider 14 is the down counter 12
The clock signal CLK ₁ input from the oscillation circuit 13 is frequency-divided based on the count data D ₁ input from, and the timing signal S ₂ is output to the inverter 4 and the synchronous rectification circuit 61 via the control circuit. Cycle T of clock CLK ₀
Is determined by the time it takes to rotate the gyroscope at 333H _Z.
When rotating at H _Z shortens the period T, if may have a long time until 333h _Z lengthening the period T.

FIG. 3 is a diagram showing the number of revolutions and the power consumption when the gyroscope is driven by the gyroscope driving power source of the present invention based on the change with time. The broken line in the figure shows the case of the conventional example, and the solid line shows the case of the gyroscope drive power source of the present invention. As shown, the rotational speed, also the power consumption can be seen to become constant at the time of a conventional 1/3 by sweeping the inverter output from the low-frequency 333h _Z.

FIG. 4 is a block diagram showing the configuration of another embodiment of the present invention. Reference numeral 20 is a CPU _{, and} 21 is a timing signal generating means provided in the CPU 20, which gives a timing signal S ₃ for sweeping control of a square wave voltage from a low frequency to a predetermined driving frequency to a switching element, and a wheel ball 51
The timing signal S ₃ is given to the synchronous rectification circuit 61 for synchronously rectifying the deviation voltage based on the deviation between the container 52 and the container 52 in synchronism with ON / OFF of the switching element.

As described above, the timing signal generating means 21
If a timing signal is given to the switching element and the synchronous rectification circuit 61 from the above, there is an advantage that the sweep circuit shown in the first embodiment can be simplified.

[0016]

As described above in detail, the invention of the present invention is as follows.
The gyroscope driving power source is the power source described in the first section of the patent.
According to Ming, the frequency of the inverter output by the sweep circuit
The number H _ZSteadily drives the gyroscope from the low frequency of
333H_ZStart up with sweep control up to
Since the rotation speed rise time and power consumption are reduced
Wear. According to the invention, what is stated in claim 2 is
Based on the timing signal of the timing signal generation means
The inverter output frequency by several H_ZFrom the low frequencies of
333H driving the iroscope_ZSweep control up to
Therefore, the configuration is simpler than that of the invention described in item 1.
The frequency can be swept with.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of a main part of a gyroscope driving power supply of the present invention.

FIG. 2 is a time chart explaining the operation of the gyroscope driving power supply of the present invention.

FIG. 3 is a diagram showing the rotation speed and power consumption of a gyroscope as time passes.

FIG. 4 is a configuration block diagram showing another embodiment of the present invention.

FIG. 5 is a configuration block diagram of a conventional gyroscope driving power source.

FIG. 6 is a diagram showing the number of revolutions and power consumption when a gyroscope is driven by a conventional device over time.

[Explanation of symbols]

 10 sweep circuit 12 down counter 14 programmable frequency divider 21 timing signal generating means

Claims (2)

[Claims] 1. Positive / negative symmetry generated in a secondary winding of a transformer by alternately turning on / off a DC voltage obtained by rectifying and smoothing AC power to a primary winding of the transformer by two switching elements. A gyroscope driving power source for driving a gyroscope by a square wave voltage having a waveform, a sweep circuit for arbitrarily changing an interval for turning on / off the switching element is provided, and the sweep circuit turns on / off the switching element.
A gyroscope driving power supply characterized in that an off cycle is controlled to be shortened stepwise, and a square wave voltage obtained in the secondary winding is swept from a low frequency to a predetermined driving frequency. 2. Positive / negative symmetry generated in the secondary winding of the transformer by alternately turning on / off the DC voltage obtained by rectifying and smoothing the AC power to the primary winding of the transformer by two switching elements. In a gyroscope driving power source for driving a gyroscope in a rolling ball by a square wave voltage having a waveform, a timing signal for sweeping and controlling the square wave voltage from a low frequency to a predetermined driving frequency is given to the switching element, and the rolling wheel is provided. A gyroscope driving power supply, comprising: a timing rectifying circuit for synchronously rectifying a deviation voltage based on a deviation between a sphere and a container, the timing signal generating means being provided in synchronism with ON / OFF of the switching element.