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A double-winding voice coil motor and its compound drive control method

A technology of voice coil motor and double winding, which is applied in the direction of AC motor control, control system, shape/style/structure of winding conductor, etc. It can solve problems such as large current ripple, large thrust fluctuation, and inability to use high-precision servo system , to achieve the effect of suppressing the current ripple

Active Publication Date: 2019-02-26
HARBIN INST OF TECH
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AI Technical Summary

Problems solved by technology

However, the chopper driving method in the switch control scheme leads to large current ripples, resulting in large fluctuations in the overall thrust, so that it cannot be used in high-precision servo systems
In order to better suppress the current ripple, it is necessary to increase the switching frequency of the power device, and put forward extremely high requirements for the computing power and real-time performance of the microprocessor. However, due to the bottleneck of the power electronic device and the computing power of the microprocessor, the switching frequency And the calculation speed of software cannot be increased without limit, so there is an urgent need for a drive control method that can satisfy high-frequency response, high precision, and high power to suppress current ripple and improve the output accuracy of the voice coil motor system

Method used

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  • A double-winding voice coil motor and its compound drive control method
  • A double-winding voice coil motor and its compound drive control method
  • A double-winding voice coil motor and its compound drive control method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Depend on figure 1 A double-winding voice coil motor is shown, which has two windings, including winding A and winding B. The winding A and winding B share the same magnetic core and are independent of each other without coupling. The number of turns of winding A is greater than that of winding B The number of turns, winding A has a large number of coil turns, as the main winding, and winding B has a small number of coil turns, as an auxiliary winding, the two windings are completely isolated mechanically and electrically, and there is no coupling relationship at all.

[0028] As an embodiment of the present invention, the winding A is connected to the main control chip through a switching power driver, the winding B is connected to the main control chip through a linear simulator, and both winding A and winding B are connected through a current sensor and an A / ...

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Abstract

The invention relates to a dual-winding voice coil motor and a composite driving control method therefor, belongs to the control field of a super-precision voice coil motor, and mainly solves the problem of influence of current ripple generated under switching drive of the voice coil motor to thrust output of the voice coil motor system, so as to further improve the output precision of the voice coil motor system in the super-precision field. The voice coil motor adopts a brand new dual-winding structure, namely a main winding and an auxiliary winding are mounted on the same iron core; the main winding is used for generating main thrust required by the exterior, and is realized by a switching control method; the auxiliary winding is used for compensating ripple thrust generated by the main winding; and in addition, a linear analogue control method is adopted, and by extracting the ripple signal generated by the main winding, the current ripple generated by the main winding is compensated in real time, so as to ensure that the overall voice coil motor system has high output precision as well as relatively high power output.

Description

technical field [0001] The invention relates to the field of motor drive control, in particular to high-precision and high-response occasions such as photolithography machine systems, precision machine tools, and high-end physical experiment devices, and specifically relates to a double-winding voice coil motor and a composite drive control method thereof. Background technique [0002] Voice Coil Motor (VCM) is a motor designed based on the principle of Lorentz force, which can directly convert electrical signals into linear displacement without any intermediate conversion mechanism. It has the advantages of simple structure, small size, light weight, small inertia, and large specific thrust. It is also used in high-precision, high-frequency excitation, fast and high-acceleration positioning systems, as well as in optical and measuring systems, optical assembly, and aerospace. Wide range of applications. [0003] There are two options for voice coil motor drive control: lin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/035H02K3/04H02P25/034
CPCH02K3/04H02K41/0354H02P25/034
Inventor 刘家曦郭峰李立毅赵一阳陈启明潘东华
Owner HARBIN INST OF TECH
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