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Centrifugal pump driven by electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor

A synchronous motor, single-phase permanent magnet technology, applied in the field of centrifugal pumps, can solve problems such as high noise and temperature rise

Active Publication Date: 2017-06-16
HANYU GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor-driven centrifugal pump disclosed in the prior application CN201210278112.4 is not only energy-saving and material-saving than previous products, but also can overcome vibration, noise and temperature rise when running without water. Higher problem, but requires a separate rotor position detection element

Method used

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  • Centrifugal pump driven by electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor
  • Centrifugal pump driven by electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor
  • Centrifugal pump driven by electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor

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Embodiment Construction

[0019] The basic mechanical structure of the centrifugal pump in the embodiment of the present invention is as follows figure 1 Shown, including:

[0020] ——U-shaped iron core single-phase permanent magnet synchronous motor ( figure 1 The cross section of the laminated iron core 3 and the winding 12 of the stator of the motor and the permanent magnet rotor 1 are shown and the centrifugal impeller 105 coaxially driven by a starting mechanism. The centrifugal impeller 105 has 4 blades. The number of blades can also be 3, 5 or 6, but it is better not to exceed 8 blades, and if an odd number of blades is used, it is more conducive to reducing vibration and noise. The impeller is injection molded with a diameter of 60mm. The impeller should not be too large or even the moment of inertia to match the starting torque of the motor that is still not too large; but it should not be too small to have sufficient moment of inertia suitable for the present invention.

[0021] ——Pump cover 106 ...

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Abstract

Centrifugal pump driven by electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor. The diameter of the impeller is 20-70mm. Narrow; the stator winding is connected to the AC power supply through the switch in the specified winding direction; the control circuit includes a detection circuit and a built-in program that drives the switch according to the signal detected by the circuit to control the current of the AC power input winding; the built-in program has the function of making all The period during which the current is zero and the detection includes detecting the terminal voltage of the winding during this period, and when the terminal voltage is monotonous by segment and no zero-crossing value occurs, the control circuit reduces the voltage output to the winding . This design can improve the vibration, noise and temperature rise when running without water, but does not need to set up a separate rotor position detection element, thus reducing costs and making it more reliable.

Description

Technical field [0001] The present invention relates to a centrifugal pump driven by an electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor, in particular to the coordination of its impeller mechanism, electromagnetic structure and control method; in the international patent classification table, the classification belongs to F04D25 / 06 or F04D27 / 00. Background technique [0002] The centrifugal pump driven by the electronically controlled U-shaped iron core single-phase permanent magnet synchronous motor disclosed in the previous application CN201210278112.4 is not only energy-saving and material-saving, but also can overcome vibration, noise and temperature rise when running without water A higher problem, but a separate rotor position detection element is required. Summary of the invention [0003] The technical problem to be solved by the present invention is to propose an electronically controlled centrifugal pump driven by a U-shaped...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/06F04D29/22F04D15/00H02K21/14
Inventor 区长钊李子宏
Owner HANYU GRP CO LTD
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