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Phase change control method of direct current brushless motor and phase change controller and direct current brushless motor

A brushless DC motor, phase control technology, applied in the direction of single motor speed/torque control, monitoring commutation, etc.

Active Publication Date: 2017-02-22
SHENZHEN TOPBAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the rated power of the brushless DC motor is fixed. According to the existing technical solutions, the rated speed and the maximum speed of the motor are fixed. If you want to increase the running speed of the motor, you can only increase the power supply voltage or change the parameters of the motor. , such as the thickness of the magnetic steel of the motor or the number of turns of the winding coil to achieve

Method used

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  • Phase change control method of direct current brushless motor and phase change controller and direct current brushless motor
  • Phase change control method of direct current brushless motor and phase change controller and direct current brushless motor
  • Phase change control method of direct current brushless motor and phase change controller and direct current brushless motor

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Embodiment Construction

[0063] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0064] Such as figure 1 As shown, an embodiment of the present invention provides a commutation control method for a brushless DC motor, and the commutation control method includes:

[0065] Step S100, acquiring six Hall position signals of the brushless DC motor rotor within one period;

[0066] Step S200, start timing when receiving the previous Hall position signal of the rotor, and stop timing when receiving the current Hall position signal, and record the timing time as t;

[0067] Step S300, when the current Hall position signal of the rotor is received, start timing, and when the timing...

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Abstract

The invention is applicable to the technical field of direct current motor control, and relates to a phase change control method of a direct current brushless motor. The method includes the step of obtaining six Holzer position signals of a rotor of the direct current brushless motor within one cycle; when the last Holzer position signal of the rotor is obtained, starting to conducting timekeeping, stopping timekeeping when the current Holzer position signal is received, and recording the timekeeping time as t; when receiving the current Holzer position signal of the rotor, starting to conducting timekeeping, when the timekeeping time reaches the preset phase change time t / n, controlling a switching tube, corresponding to the next Holzer position signal, in an inverter bridge arm of the direct current brushless motor to open or close, wherein when the current Holzer position signal is the first Holzer position signal within the cycle, the last Holzer position signal is the sixth Holzer position signal of the rotor within the last cycle, and 1<n<=2. Under the condition of ensuring the voltage balance of the motor, the method effectively improves the rotation speed of the motor in running under the condition of constant power.

Description

technical field [0001] The invention belongs to the technical field of direct current motor control, and in particular relates to a commutation control method of a brushless direct current motor, a commutation controller and a brushless direct current motor. Background technique [0002] Brushless DC Motor (Brushless DC Motor) is a kind of synchronous motor, that is to say, the speed of the motor rotor is affected by the speed of the rotating magnetic field of the motor stator and the number of rotor poles. and the advantages of DC motors. Brushless motors have the advantages of high efficiency, low noise, high torque, and long life. They have been widely used in various industries, and their control methods are also in the process of continuous evolution and optimization. [0003] The DC has the square wave control of the Hall three-phase brushless motor, and adopts the three-phase six-step driving method. The three Hall sensors provide the position of the motor rotor, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/12
CPCH02P6/08H02P6/12
Inventor 陈建
Owner SHENZHEN TOPBAND CO LTD
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