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Motor driving module and brushless DC motor system

  • US 9,490,735 B2
  • Filed: 06/05/2013
  • Issued: 11/08/2016
  • Est. Priority Date: 12/10/2012
  • Status: Expired due to Fees
First Claim
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1. A motor driving module, comprising:

  • a motor driving unit configured to control a pulse width modulation (PWM) inverter on the basis of positional information and a control signal, the motor driving unit including a reference voltage generator configured to generate a reference voltage that varies depending on a type of PWM;

    a PWM inverter configured to output three-phase voltages on the basis of DC power according to control of the motor driving unit;

    a phase voltage estimating unit configured to output three-phase estimated voltages on the basis of the positional information, the DC power, and a voltage modulation index that varies depending on the type of PWM and the reference voltage corresponding to the type of PWM; and

    a position detecting unit configured to output the positional information on the basis of the three-phase estimated voltages,wherein the positional information is on an external motor that operates on the basis of the three-phase voltages.

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