A kind of blower permanent wind amount motor drive control method

A kind of blower permanent wind amount motor drive control method

  • CN 105,570,175 B
  • Filed: 03/07/2016
  • Issued: 12/14/2018
  • Est. Priority Date: 03/07/2016
  • Status: Active Grant
First Claim
Patent Images

1. a kind of blower permanent wind amount motor drive control method, it is characterised in that the following steps are included:

  • (1) the machine winding PWM duty cycle initial value Duty under the unobstructed normal condition in air duct is determined0, wind passage mouth air outputCFM0, while determining current motor electric current I0

    (2) machine winding PWM duty cycle initial value Duty is kept0It is constant, wind passage mouth is blocked in proportion;

    Wind passage mouth is initialSectional area is S0, the available ventilation sectional area after blocking is Sx, different S are obtained respectivelyxAir outlet air quantity CFM under valuex, motorElectric current Ix

    With wind passage mouth blocked area ratio Sx/S0For abscissa, by air outlet air quantity CFMx, current of electric IxIt is set to vertical seatMark obtains the blocking of motor governor free state lower air duct and motor operating parameter, air quantity change curve, i.e., bent without speed regulation referenceLine, and be stored in motor memory module;

    (3) by adjusting duty ratio DutyxSo that in different SxIt is worth lower CFMxIt is constantly equal to CFM0, obtain duty ratio Dutyx, current electricityElectromechanics stream Ix

    With Sx/S0For abscissa, duty ratio Dutyx, current of electric IxIt is set to ordinate, show that permanent wind amount adjusts baseDirectrix curve, and be stored in motor memory module;

    (4) after electric motor starting, by duty ratio DutyxIt is arranged to initial value Duty0, measure current of electric Ix

    According in memory moduleWithout speed regulation reference curve obtain air outlet blocking ratio Sx/S0, judge whether fan outlet is in " blocking " state;

    (5) ratio S is blocked according to air outletx/S0The permanent wind amount inquired in memory module adjusts datum curve, obtains required electricityMachine winding PWM duty cycle Dutyx, and the duty ratio of current motor is modified to Dutyx, use tuyere air volume CFMxIt is constantly equal toCFM0

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×