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A control method for a full-field DC motor system

A DC motor and control method technology, 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: 2021-09-24
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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  • A control method for a full-field DC motor system
  • A control method for a full-field DC motor system
  • A control method for a full-field DC motor system

Examples

Experimental program
Comparison scheme
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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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PUM

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Abstract

The invention discloses a control method for a full-field DC motor system. When the rotor poles are in the process of overlapping with the stator poles, the magnetic field generated by the stator winding current and the magnetic field polarity of the rotor poles are mutually Attraction, when the rotor pole centerline rotates past the stator pole centerline, the direction of the current is changed. At this time, the magnetic field generated by the stator winding current and the magnetic field polarity of the rotor pole repel each other, pushing the rotor to continue Turning forward, the present invention relates to the field of motor systems. The present invention subverts the traditional motor driving principle through a rotating magnetic field. Each stator winding is independently controlled by a power controller, and all motor windings participate in the drive, which greatly improves the power density of the motor.

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 Patents(China)
IPC IPC(8): H02P6/17H02P6/04
CPCH02P6/04H02P6/17
Inventor 杨猛
Owner 杨猛