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Electromagnetic pump driving method

A driving method, electromagnetic pump technology, applied in the direction of AC motor control, pump, pump control, etc., can solve the problem of a little delay in closing, and achieve the effect of alleviating the phenomenon of water hammer, reducing backflow, and reducing noise or vibration

Inactive Publication Date: 2006-11-22
SHINANO KENSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, although the first suction and discharge valve and the second suction and discharge valve are opened and closed due to the pressure change in the pump chamber due to the movement of the movable member, no matter which valve, it is not the same as opening from the closed state. When closing from the open state, the valve closes with a delay because the fluid temporarily flows in the opposite direction from the previous flow direction.

Method used

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Examples

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Effect test

Embodiment 1

[0047] Below, refer to Figure 1 to Figure 4 , to describe an ideal embodiment of the driving method of the electromagnetic pump adopted in order to improve the above-mentioned problems associated with the opening and closing of the valve. Figure 1 to Figure 4 Shown are voltage waveforms applied across the respective solenoid coils 50a and 50b. In addition, the drive voltage (pulse voltage) for each electromagnetic coil 50a and 50b is generated by a drive control circuit not shown, for example, a DC pulse voltage may be generated from a DC power supply voltage, or may be generated by rectifying an AC power supply voltage. DC pulse voltage.

[0048] figure 1 It is shown that the pulse voltage applied for driving the electromagnetic coils 50a and 50b is alternately applied on the positive side and the negative side, and the voltage change when the polarity of the pulse voltage is reversed has at least a gradient linearly connected between the positive side and the negative s...

Embodiment 2

[0051] Below, refer to Figure 5 and Figure 6 Another example of the driving method of the electromagnetic pump will be described. Figure 5 and Figure 6 Shown are voltage waveforms applied across the respective electromagnetic coils 50a and 50b or current waveforms flowing through the respective electromagnetic coils 50a and 50b. Figure 5Shown is a sinusoidal pulse voltage applied for driving the electromagnetic coils 50a and 50b. By applying a sinusoidal pulse voltage, the voltage change when the polarity is reversed is moderated, the moving speed of the movable body 10 is not fast, and the sudden pressure fluctuation of the pump chambers 30a and 30b can be reduced. By doing this, it is possible to reduce the vibration of the cylinder wall surface caused by the sudden change of the force acting on the inner surface of the pump chamber, and the vibration of the stator caused by the sudden change of the electromagnetic force acting on the electromagnetic coils 50a and 50...

Embodiment 3

[0058] Below, refer to Figure 7 to Figure 9 , to describe another example of the driving method of the electromagnetic pump. Figure 7 to Figure 9 Shown are voltage waveforms applied across the respective electromagnetic coils 50a and 50b or current waveforms flowing through the respective electromagnetic coils 50a and 50b.

[0059] Figure 7 and Figure 8 It shows that a pulse voltage or a pulse current is applied, and there is a period in which the voltage or current value is zero when the polarity of the driving voltage or the energizing current of each electromagnetic coil 50 a and 50 b is reversed. Figure 8 A linearly continuous slope portion is provided for the voltage current change before and after zero voltage or zero current. In this way, the speed at which the valve is opened and closed can be slowed down, backflow can be reduced, water hammer can be alleviated, and generation of noise or vibration can be reduced. For example, using Figure 7 The driving meth...

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Abstract

An electromagnetic pump driving method in which noise and vibration accompanying abrupt pressure variation in a pump chamber are reduced. A pulse voltage applied alternately to the positive side and the negative side so as to drive an electromagnetic coil is such that a voltage variation occurring when the polarity of the pulse voltage is inverted has a continuous inclination at least between the positive side and the negative side.

Description

technical field [0001] The present invention relates to a driving method of an electromagnetic pump, and more specifically relates to a driving method of an electromagnetic pump used for conveying fluids such as gas and liquid. Background technique [0002] The applicant of this case proposed a miniaturized thin electromagnetic pump. Firstly, a movable part that can freely reciprocate is placed in the cylinder on the stator side. In the pump cavity formed between the two sides of the moving part in the moving direction and the two ends of the cylinder, in one pump cavity, the fluid is sucked in from the outside through the first valve, and then discharged to the outside through the second valve, and in the other pump cavity. The same pump function is also played in the cavity. When the electromagnetic coil is energized, the electromagnetic coil receives an electromagnetic force from a magnetic field, and the movable member moves in the axial direction of the cylinder as a r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B17/04F04B49/06H02K33/16H02P25/06
CPCF04B17/04F04B49/065F04B2203/0402
Inventor 矢口文博田岛正晴
Owner SHINANO KENSHI
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