A kind of conductings of BLDCM bis- or two and three or three conducting switching methods

A kind of conductings of BLDCM bis- or two and three or three conducting switching methods

  • CN 107,171,605 A
  • Filed: 05/19/2017
  • Published: 09/15/2017
  • Est. Priority Date: 05/19/2017
  • Status: Active Application
First Claim
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1. a kind of conductings of BLDCM bis- or two and three or three conducting switching methods, mainly include the brushless dc with position sensorMachine, dsp chip, CPLD modules, it is characterised in that methods described is first to allow brshless DC motor to be transported under the mode of two or two conductingsIn row three seconds, after the rotating speed of brshless DC motor is steady, three or three conduction modes are switched to, specific method step is as follows:

  • Step 1, using the hall sensor signal of brshless DC motor, dsp chip, CPLD modules, logical operation goes out two or two and led respectivelyLogical and three or three conductings program modules;

    Step 2, brshless DC motor is allowed to be switched to three or three conducting operational modes by two or two conductings at 3s, in the master of dsp chipOne section of delay function is write in function, make dsp chip send all the way first three second be high level, be continuously after three seconds low levelStep signal;

    Step 3, step signal dsp chip in step 2 sent is sent into CPLD modules, is used as the switching of two kinds of conduction modesSignal;

    Step 4, the step signal in two or two conducting program modules and step 2 is done and logic, three or three conducting program modules and step 2In the non-of step signal do and logic, then the result after above-mentioned logic is done or logic again;

    Or first three second of the result of logicIt is two or two conducting drive signals, is three or three drive signals turned on after three seconds, this drive signal is used as electricity in the output of CPLD modulesThe drive signal of machine inverter.

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