A small centrifugal pump driven by U-shaped iron core single-phase permanent magnet synchronous motor
A synchronous motor and single-phase permanent magnet technology, which is applied in the direction of starting devices, machines/engines, pumps, etc., can solve problems such as low efficiency, achieve the effects of reducing complexity, reducing requirements, and stabilizing product performance
Active Publication Date: 2017-12-01
HANYU GRP CO LTD
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In view of the fact that the traditional small centrifugal pump is driven by an asynchronous motor and the efficiency is low, the existing technology proposes to directly drive it by a U-shaped iron core single-phase permanent magnet synchronous motor, which saves energy and has a small volume, and has a relatively high speed in the predetermined direction of rotation. Good starting and running performance, low cost, but the motor needs to set a separate rotor position detection element
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] The basic mechanical structure of the centrifugal pump in the embodiment of the present invention is as follows: figure 1 shown, including:
[0038] ——U-shaped core single-phase permanent magnet synchronous motor ( figure 1 It shows the laminated iron core 3 and winding 12 of the motor stator and the section of the permanent magnet rotor 1) and the centrifugal impeller 105 coaxially driven by a starting mechanism. Centrifugal impeller 105 has 4 blades; according to water pressure requirements, the number of blades can also be 3, 5 or 6, but preferably not more than 8, and if an odd number of blades is used, it is more conducive to reducing vibration and noise. The impeller is injection molded and has a diameter of 60mm. The impeller should not be too large so that the moment of inertia is too large to cooperate with the not too large starting torque of the motor; but it should not be too small to have enough moment of inertia to adapt to the starting method of the pre...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
Disclosed is a small-sized centrifugal driven by a U-shaped iron core single-phase permanent magnet synchronous motor. The diameter of an impeller is 20-70 mm. The width of air gaps between stators and a permanent magnet rotor of the motor is decreased on the lower edge of every pole in the set circumferential direction. Stator windings are provided with a specified winding direction, and connected to an alternating current power source through a switch. A control circuit comprises a detection circuit and a built-in program. The built-in program comprises the steps that the built-in program drives the switch to control starting control of current of an alternating current power source input winding according to a detected signal; a) the switch is turned on to make a half-wave voltage of an alternating current power source act on the windings by a specified conduction angle, and current produced in the windings is detected; and b) if the current meets the specification, the switch is continuously turned on according to an alternating current power source period and the specified conduction angle immediately, and the motor is operated synchronously; or after a certain time which is enough for the rotor to stop reliably, the processes from the step a) is repeated. According to the design, the complexity of the control program and the requirement for the components, the parts and the circuit are lowered; the cost is reduced and the product property is more stable.
Description
technical field [0001] The invention relates to a small centrifugal pump driven by a U-shaped iron core single-phase permanent magnet synchronous motor, in particular to the cooperation of its mechanical structure, electromagnetic structure and control method; in the international patent classification table, the classification belongs to F04D25 / 06 or F04D27 / 00. Background technique [0002] Small centrifugal pumps are widely used and run for a long time, so there is an urgent need for low-cost manufacturing and energy-saving operation. In view of the fact that the traditional small centrifugal pump is driven by an asynchronous motor and the efficiency is relatively low, the existing technology proposes to directly drive it by a U-shaped iron core single-phase permanent magnet synchronous motor, which saves energy and has a small volume, and has a relatively high speed in the predetermined direction of rotation. It has good starting and running performance and low cost, bu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/06H02P6/22
Inventor 区长钊
Owner HANYU GRP CO LTD