Motor driving module and brushless DC motor system
First Claim
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.
1 Assignment
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Accused Products
Abstract
A motor driving module is provided which includes a motor driving unit configured to control a PWM inverter on the basis of positional information and a control signal; 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; 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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Citations
10 Claims
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1. A motor driving module, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A brushless direct current (BLDC) motor system, comprising:
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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 BLDC motor configured to operate on the basis of the three-phase voltages; 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. - View Dependent Claims (9, 10)
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Specification