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Control method of full-magnetic-field direct-current motor system

A technology of a DC motor and a control method, applied in the field of motors, can solve problems such as limited power density, and achieve the effect of improving power density and compact structure

Active Publication Date: 2020-07-03
杨猛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing brushless DC motor based on the principle of rotating magnetic field, at any time, only two-thirds of the windings are energized and doing work, and their power density is limited.

Method used

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  • Control method of full-magnetic-field direct-current motor system
  • Control method of full-magnetic-field direct-current motor system
  • Control method of full-magnetic-field direct-current motor system

Examples

Experimental program
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Embodiment

[0026] Example: According to Figure 3-6 It can be seen that a brushless motor with a 4-stage rotor and 5 salient pole stators is selected to introduce the embodiment of the present invention. The structure of the motor is as follows: image 3 As shown, the schematic diagram of the motor and motor control system is shown in Figure 5 As shown, the identification mark of the phase mark code disc 4 coincides with the center line of the magnetic pole of the rotor 3, and there is a dead space; each stator magnetic pole 1 corresponds to two phase sensors 5, for example, the A magnetic pole corresponds to two phase sensors MA1 and MA2 5. MA1 is located on the center line of the magnetic pole A, and the phase difference between MA2 and MA1 is 90°, which is the angle between the center lines of the two rotors 3 magnetic poles. Turn on the included angle of the phase signal at 87°, that is, when the stator pole 1 current commutates, there is a dead zone with an included angle of 3°. ...

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Abstract

The invention discloses a control method of a full-magnetic-field direct-current motor system. When the rotor magnetic pole is in a process of being approximately overlapped with the stator magnetic pole, the magnetic field generated by the stator winding current and the magnetic field polarity of the rotor magnetic pole attract each other. When the center line of the rotor magnetic pole rotates through the center line of the stator magnetic pole, current direction is changed. At the moment, the magnetic field generated by the stator winding current and the magnetic field polarity of the rotormagnetic pole repel each other, to push the rotor to continue to rotate forward. The invention relates to the field of motor systems, and subverts the principle that a traditional motor is driven bya rotating magnetic field, all stator windings are independently controlled by a power supply controller, all motor windings participate in driving, and the power density of the motor is greatly improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a control method for a full-field DC motor system. Background technique [0002] The motor is a device that converts electrical energy into mechanical energy. It uses a energized coil to generate a rotating magnetic field and acts on the rotor to form a magnetoelectric force rotation torque. The principle model of a DC motor in physics is shown in figure 1 , when the coils at both ends are supplied with current, according to the right-handed spiral rule, an external magnetic induction B pointing to the right will be generated, and the middle rotor will try to keep the direction of its internal magnetic induction line consistent with the direction of the external magnetic induction line. In order to form a shortest closed magnetic field line loop, so that the inner rotor will rotate clockwise. Using this principle, the predecessors designed a brushed DC motor with a commutator. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/17H02P6/04
CPCH02P6/04H02P6/17
Inventor 杨猛
Owner 杨猛