Non-contact electromagnetic loading device for high speed electric spindle

Abstract

The invention discloses a non-contact electromagnetic loading device for a high speed electric spindle, wherein the mechanical part of the device is as follows: an electric spindle is fixed on a supporting seat; a central spindle is sleeved in the inner cavity of the electric spindle; one end of the central spindle is coaxially sleeved with a circular loading disc; a balancing device is arranged at the outer end of the circular loading disc; the circular loading disc is provided with an inclined through hole along the axial direction; an integral bracket is arranged around the circular loading disc; a radial force loading electromagnet is arranged on the lower part of the integral bracket and wrapped with direct current excitation coils (1) and (2); a left torque loading electromagnet and a right torque loading electromagnet are respectively arranged on two sides of the integral bracket; each of the left and right torque loading electromagnets is wrapped with the direct current excitation coils (3) and (4); the electric part of the device comprises a PWM (pulse width modulation) switch power amplifier; the output end of the PWM switch power amplifier is simultaneously connected with a magnetic field controller and the direct current excitation coils (1), (2), (3) and (4) while the input end of the PWM switch power amplifier is orderly connected with a diode rectification circuit and a rectifier transformer; and the magnetic field controller is connected with an industrial control machine. The device provided by the invention solves th difficult loading problem in the performance analysis test of the high speed electric spindle.

Description

Technical field [0001] The invention belongs to the technical field of power control equipment and relates to a high-speed electric spindle non-contact electromagnetic loading device. Background technique [0002] As an emerging technology, high-speed electric spindles have been widely used in the manufacturing industry to realize high-speed and high-precision machining on CNC machine tools. In order to improve the machining accuracy and reliability of high-speed CNC machine tools, it is necessary to conduct experimental research on the reliability and dynamic performance of high-speed electric spindles under load. The test must first solve the loading problem of high-speed electric spindles. At present, there are few researches on the loading problem of high-speed electric spindle test at home and abroad. The proposed loading method is still the drag-type loading used in low-speed motor loading, that is, the dynamometer as the loading device is coaxially connected with the motor...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a non-contact electromagnetic loading device for high-speed electric spindles, which solves the problem of difficult loading of high-speed electric spindles in the prior art

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