Novel high stability sinusoidal wave gyro motor driving power supply

Abstract

The present invention provides a novel high stability sinusoidal wave gyro motor driving electric power source. The three-phase sinusoidal generator outputs the three-phase sinusoidal wave to the input end of the comparing unit. The trigger pulse which is generated when the three-phase sinusoidal wave passes through the comparator unit, and is transmitted to the D lamp power amplifier after passing through the insulating driving unit. The gyro motor circuit is connected with the three-phase sinusoidal generator to form a negative feedback and realize the alternating current velocity modulating of the gyro motor. The three-phase sinusoidal wave is generated by the chip SA866AE in the three-phase sinusoidal wave generator, and after the low-pass filtering the noxious harmonic is eliminated and the comparing unit generates the trigger pulse. The trigger pulse is transmitted to the D kind power amplifier through the insulating driving unit for driving the electric motor. Compared the disadvantages of many devices, complex circuit, and unreliable operation and not easily realizing the accurate control for realizing the electric motor velocity modulation by the conventional analog circuit, the control chip of the invention has the advantages of less periphery devices, high accuracy and strong interference resistance. The invention is especially suitable for the industrial hostile environment.

Description

technical field [0001] The invention relates to a three-phase motor drive power supply, in particular to a novel high-stability sine wave gyro motor drive power supply which improves the performance of the gyro motor and increases its output power. Background technique [0002] At present, most of the gyro motors are driven by the rectangular wave power generated by the DC / AC inverter. According to the spectrum analysis, the rectangular wave contains a large number of high-order harmonics, which have a great impact on the operation of the motor and the performance of the gyro. : [0003] First, the influence of the harmonics of the rectangular wave power supply on the performance of the gyroscope mainly lies in the accuracy of the misalignment speed error. [0004] The tuning angular velocity of the gyroscope is: Ω 0 =√[K / (a-c / 2)] [0005] The actual rotation angular velocity of the gyroscope is: δΩ [0006] Ω'=Ω 0 +δΩ (where δΩ is the tuning speed error) [0007] Gyro...

AI Technical Summary

Problems solved by technology

The existence of harmonics will add dv / dt and di / dt stress to the motor insulation, which will affect the life of the motor; the harmonic current will cause the motor to heat up and increase the loss, and the general motor has to be used with "reduced power";

[0021] (2) There are also restrictions on the length of the output cable

If a harmonic filter is installed to suppress the influence of harmonics on the power grid, in addition to adding equipment, but also because the manufacture of the filter is related to the parameters of the power grid, once the parameters change, it has to be retuned, which is quite troublesome;

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