A driving device for the excitation coil of an online magnetic balance head

Abstract

The invention discloses a drive device of a magnet exciting coil with an online magnetic balancing head. The drive device comprises a voltage regulating circuit and a current regulating circuit, wherein the voltage regulating circuit is composed of a comparison circuit, a metal-oxide-semiconductor field effect transistor (MOSFET) drive circuit, an MOSFET and a filter circuit and can convert a voltage signal output by a controller into a power signal with a wave form similar to that of the voltage signal; and the current regulating circuit is composed of an H bridge circuit and two half-bridge drive circuits and can change a current direction of the power signal output by the voltage regulating circuit in a staggered manner by controlling the H bridge circuit to switch on or off a bridge so as to meet a requirement for an operation of a drive coil with a dynamic balancing head. By coordinating the voltage regulating circuit with the current regulating circuit, drive voltages meeting the requirement for a magnet exciting coil with an online active balancing head can be outputted. The drive circuit provided by the invention is adopted, so that the magnet exciting coil with a balancing head can be driven so as to rotate a counterweight plate in relative to a main shaft, thus further correcting imbalance of the high-speed main shaft. Therefore, a vibration level of a machine is reduced, and operation quality, efficiency and service life of the machine are improved.

Description

technical field [0001] The invention belongs to the technical field of rotating machinery dynamic balance, and relates to a driving device for an excitation coil of an online magnetic balance head. Background technique [0002] Unbalance is the main cause of vibration during operation of various rotating machinery, which leads to damage or life reduction. On-line dynamic balancing technology is to install an automatic balancing head on the rotor without stopping the machine and without human intervention, and the automatic balancing head provides an additional and adjustable unbalance to realize the redistribution of the shafting mass , to complete the dynamic balance. [0003] The magnetic balance head is a new type of non-contact dynamic balancing device developed in recent decades, which includes the use of "electromagnetic + permanent magnet" hybrid excitation method to use permanent magnets and ring coils to form a magnetic circuit to realize the rotation and self-lock...

AI Technical Summary

Problems solved by technology

According to the retrieved patents and papers, there is no publicly available drive circuit for dynamic balance excitation coils in China.

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