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Startup method and startup device of permanent magnet direct current brushless hall-less motor

A permanent magnet DC and voltage technology, applied in the direction of the starting device, etc., can solve the problems of complex system and high cost, and achieve the effect of simple realization, low cost, and stable and reliable starting process

Inactive Publication Date: 2011-02-16
SINO WEALTH ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The realization system of above-mentioned method is complicated, and cost is too high

Method used

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  • Startup method and startup device of permanent magnet direct current brushless hall-less motor
  • Startup method and startup device of permanent magnet direct current brushless hall-less motor
  • Startup method and startup device of permanent magnet direct current brushless hall-less motor

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0029] figure 1 It is a flowchart of a method for starting a permanent magnet DC brushless Hallless motor according to an embodiment of the present invention. As shown, the launch method can include:

[0030] Execute step S101, energize any two phases of the three phases of the motor according to the six steps of the motor, and apply a single pulse voltage.

[0031] figure 2 It is an equivalent schematic diagram of a permanent magnet DC brushless Hallless motor and its main driving circuit according to an embodiment of the present invention. As shown in the figure, the motor M can be equivalent to a structure composed of three stator windings A, B, C, where phase A can include resistors R connected in series A , inductance L A and back EMF e A , similarly Phase ...

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Abstract

The invention provides a startup method of a permanent magnet direct current brushless hall-less motor, which comprises the following steps of: applying single-pulse voltage on any two phases of three phases of the motor; detecting and recording the value of the current passing through the two phases when the pulse is about to end; repeating the previous process to finish six-step energization and current detection of the motor; comparing all current values, finding out the maximal value and a corresponding energization phase, and judging the position of a rotor of the motor; and starting the motor according to the position of the rotor. Correspondingly, the invention also provides a startup device of the permanent magnet direct current brushless hall-less motor. By using the startup method and the startup device, forcible positioning is not necessary when determining the position of the rotor before the motor is started, the application range of the motor is not influenced, the motor is not impacted when started, and the starting process is smooth and reliable. Besides, the motor is powered on and detected based on the current condition without extra hardware resources, the startup method and the startup device are simple to implement and have low cost, and the starting speed of the motor is quick.

Description

technical field [0001] The invention relates to the technical field of permanent magnet DC brushless Hallless motors, in particular, the invention relates to a starting method and starting device for permanent magnet DC brushless Hallless motors. Background technique [0002] When the existing permanent magnet DC brushless Hallless motor is started, the position of the rotor of the motor needs to be determined first. The methods for determining the position of the motor rotor in the prior art mainly include: [0003] (1) The method of forcing the rotor to be positioned and then starting it in an open loop. However, when the rotor is forced to be positioned, the motor will rotate for a while (may be reversed), and in many cases the application of the motor (such as in the application of a lathe or a train) does not allow it to rotate at the start, because this is Very dangerous, so the scope of application of the above method is limited. In addition, starting the motor dur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20
Inventor 陈朝辉周序伟辛巍尹志光
Owner SINO WEALTH ELECTRONICS
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