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Dual sided self-oscillation circuit for driving oscillation actuator

A self-excited oscillation and exciter technology, which is applied in the direction of electrical components, AC motor control, high-efficiency power electronic conversion, etc., can solve the problems of difficult coherent oscillation and unsatisfactory performance of reciprocating parts

Inactive Publication Date: 2004-07-07
MATSUSHITA ELECTRIC WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this scheme, it is difficult for the reciprocating member to maintain a coherent oscillation when carrying a heavy load without being considerably damped
[0004] Further, at figure 1

Method used

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  • Dual sided self-oscillation circuit for driving oscillation actuator
  • Dual sided self-oscillation circuit for driving oscillation actuator
  • Dual sided self-oscillation circuit for driving oscillation actuator

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Embodiment Construction

[0030]Reference is now made to Figures 2 and 3, which illustrate the basic principles of the self-oscillating circuit for driving an oscillation exciter of the present invention. For purposes of illustration, the invention will now be described in the context of driving a linear oscillating exciter. However, it should be noted that the invention can also be applied to other types of exciters, such as cyclic oscillator exciters.

[0031] The self-excited oscillation circuit is connected to receive the counter electromotive force voltage formed by passing through the coil of the exciter in a positive feedback mode, so as to generate a driving pulse and apply it to the exciter. The drive pulse causes current to be periodically applied to the coil in both positive and negative directions to sustain the oscillation of the actuator (reciprocating mechanism). The oscillating frequency of the exciter is the mechanical resonance frequency or natural frequency of the reciprocating part...

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Abstract

A dual sided self-oscillation circuit for driving an oscillatory actuator with high efficiency and high response speed. The actuator has a winding to receive a periodical supply current from a power source and oscillates in a predetermined resonant frequency. The self-oscillation circuit includes a bandpass filter for receiving a back electromotive force voltage (Vbemf) developed across the winding and producing a sine wave output signal, a comparator for comparing the sine wave output signal with a threshold voltage and producing two drive pulses per cycle of the resonant frequency, and a switch connected in series with the winding to connect or disconnect the power source to the winding in response to the drive pulses, thereby flowing electric current in two directions at each cycle.

Description

technical field [0001] The present invention relates to a self-excited oscillation circuit for driving an oscillation exciter, in particular to a bilateral self-excited oscillation circuit for driving a linear or cyclic oscillation exciter, which makes the drive The current has two directions in the actuator to improve the performance and controllability of the actuator. Background technique [0002] Linear oscillatory actuators have been used in many electrical devices, such as reciprocating scrapers, and typically consist of a stator with coils and a reciprocating mechanism with permanent magnets. The coil is connected to receive a periodic current from a power source to generate a magnetic flux interacting with the permanent magnet so that the mechanical resonance of the reciprocating part is near its natural frequency, thereby pushing the reciprocating part to move linearly relative to the stator. The present invention is directed to a self-oscillating circuit for drivi...

Claims

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Application Information

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IPC IPC(8): H02P25/06H02P25/02
CPCY02B70/1441H02P25/027H02P25/032H02M7/5383H02P25/06H02M7/538
Inventor 哈利德·S·格克蒂尔克
Owner MATSUSHITA ELECTRIC WORKS LTD