APPARATUS AND METHOD OF DRIVING MOTOR WITH INITIAL COMPENSATION

• US 20130063069A1
• Filed: 02/01/2012
• Published: 03/14/2013
• Est. Priority Date: 09/09/2011
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: KO, Joo Yul
• Application Number:
  US13/363,897
• Publication Number:
  US 20130063069A1
• Time in Patent Office: Days
• US Class Current: 318/722
• CPC Class Codes: H02P 6/085 in a bridge configuration
• CPC Class Codes: H02P 6/26 Arrangements for controlling single phase motors

Abstract

There are provided an apparatus and a method for driving a motor with initial compensation. The apparatus for driving a motor includes a current detecting part detecting a voltage of a driving current flowing in the motor through an inverter supplying the driving current to the motor; a peak value detecting part detecting a peak value of the voltage detected by the current detecting part; an A/D converting part converting the voltage from the peak value detecting part into a digital signal; and a driving controlling part driving the motor for a predetermined initial driving period to compensate for an offset in the driving current based on the digital signal from the A/D converting part.

Claims

1. An apparatus for driving a motor, the apparatus comprising:

a current detecting part detecting a voltage of a driving current flowing in the motor through an inverter supplying the driving current to the motor;

a peak value detecting part detecting a peak value of the voltage detected by the current detecting part;

an A/D converting part converting the voltage from the peak value detecting part into a digital signal; and

a driving controlling part driving the motor for a predetermined initial driving period to compensate for an offset in the driving current based on the digital signal from the A/D converting part.

2. The apparatus of claim 1, wherein the current detecting part includes a resistor connected between the inverter and a ground so as to detect the current flowing to the ground through the inverter, and detects the voltage determined by a resistance value of the resistor and the current flowing in the resistor.

3. The apparatus of claim 1, wherein the peak value detecting part includes an envelope detector detecting an envelope of AC voltages detected by the current detecting part to thereby detect the peak value.

4. The apparatus of claim 1, wherein the peak value detecting part includes an integrator integrating AC voltages detected by the current detecting part to thereby detect the peak value.

5. The apparatus of claim 4, wherein the peak value detecting part includes:

an operational amplifier having a first input terminal and a second input terminal receiving the AC voltages detected by the current detecting part; and

a capacitor connected between an output terminal of the operational amplifier and the second input terminal.

6. The apparatus of claim 1, wherein the driving controlling part includes:

a pulse width modulation (PWM) controller controlling the driving of the motor for the initial driving period and compensating for the offset in the driving current with a previously set offset compensation value corresponding to a magnitude of the digital signal from the A/D converting part; and

a gate driver generating a gate signal according to the controlling of the PWM controller and providing the gate signal to the inverter.

7. The apparatus of claim 1, wherein the initial driving period is a period from motor driving initiation until a time at which a predetermined amount of motor revolutions is reached.

8. A method of driving a motor, the method comprising:

detecting a voltage of a driving current flowing in the motor through an inverter supplying the driving current to the motor;

detecting a peak value of the voltage detected by the current detecting part;

performing A/D conversion by converting the voltage from the peak value detecting part into a digital signal; and

controlling driving of the motor by driving the motor for a predetermined initial driving period and compensating for an offset in the driving current based on the digital signal.

9. The method of claim 8, wherein the detecting of the voltage includes detecting the voltage determined by a resistance value of a resistor connected between the inverter and a ground and the current flowing in the resistor so as to detect the current flowing to the ground through the inverter.

10. The method of claim 8, wherein the detecting of the peak value includes detecting the peak value using an envelope of AC voltages.

11. The method of claim 8, wherein the detecting of the peak value includes detecting the peak value by integrating AC voltages.

12. The method of claim 8, wherein the controlling of the driving of the motor includes:

controlling pulse width modulation (PWM) by controlling the driving of the motor for the initial driving period and compensating for the offset in the driving current with a previously set offset compensation value corresponding to a magnitude of the digital signal; and

generating a gate signal according to the controlling of PWM and providing the gate signal to the inverter.

13. The method of claim 8, wherein the initial driving period is a period from motor driving initiation until a time at which a predetermined amount of motor revolutions is reached.