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Brushless DC motor and its rotor position positioning method and starting method

A technology for brushing the position of DC motors and rotors, applied in the direction of electronic commutation motor control, electrical components, starting devices, etc., can solve the problems of low reliability, blind rotor control, and noise, and achieve high starting reliability, The effect of low noise and strong starting ability

Active Publication Date: 2017-01-04
深圳市武迪电子科技有限公司
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AI Technical Summary

Problems solved by technology

[0006] The problem with this starting method is that the control of the rotor is blind in the initial stage, and it cannot ensure that the rotor keeps up with the rotating magnetic field, so the reliability of starting is not high, and there is noise, especially when the load and its moment of inertia change , it is difficult to start successfully, which greatly limits the application range of sensorless brushless DC motor technology, especially for water pumps and oil pumps with high load torque, etc., basically this technology cannot be used

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  • Brushless DC motor and its rotor position positioning method and starting method
  • Brushless DC motor and its rotor position positioning method and starting method
  • Brushless DC motor and its rotor position positioning method and starting method

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Embodiment Construction

[0047] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0048] Please refer to figure 1 , the embodiment of the present invention provides a brushless DC motor, the power supply is connected to the three-phase stator of the brushless DC motor through a three-phase inverter bridge composed of six power transistors Ta+, Ta-, Tb+, Tb-, Tc+ and Tc- Winding, where Ta+ and Ta- are the two power transistors of the upper and lower bridge arms of the A phase respectively; Tb+ and Tb- are the two power transistors of the upper and lower bridge arms of the B phase respectively, and Tc+ and Tc- are the power transistors of the C phase respectively There are two power transistors in the upper and lower bridge arms; the brushless DC motor includes a dri...

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Abstract

The embodiment of the invention discloses a brushless direct current motor, a method for positioning the position of a rotor of the brushless direct current motor and a method for starting the brushless direct current motor. The technical scheme that a preset pulse voltage vector is exerted on a motor winding, the extreme value of the oscillating current amplitude produced in the voltage increasing step is detected and a 60-degree sector where the rotor is located is determined according to the corresponding relation between the extreme value of the oscillating current amplitude and the rotor position is adopted, and the technical effects of being high in starting reliability, high in starting capacity when the load is large and low in noise are achieved.

Description

technical field [0001] The invention relates to the field of brushless direct current motors, in particular to a brushless direct current motor and its rotor position positioning method and starting method. Background technique [0002] Brushless DC motors have the advantages of high efficiency, energy saving, long life and high reliability. Compared with traditional brushed DC motors, brushless DC motors have great performance advantages. With the development of computer, electric power and electronic technology, brushless DC motors have been used more and more widely. [0003] The main factor affecting the widespread application of brushless DC motors is cost. Compared with DC motors, the cost of brushless DC motors is relatively high. In the hardware cost, the rotor position sensor accounts for a larger part. Moreover, the installation and wiring of the rotor also adds a lot of cost. In some special applications, such as refrigeration compressors, the use of rotor pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/185H02P6/20
Inventor 吴凯梁建国
Owner 深圳市武迪电子科技有限公司
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