Apparatus and Method for Controlling Hybrid Motor

• US 20090072776A1
• Filed: 01/10/2007
• Published: 03/19/2009
• Est. Priority Date: 01/10/2006
• Status: Active Grant

• Current Assignee: Namyang Nexmo Co., Ltd.
• Original Assignee: Eni SPA (Eni Petroleum Company Incorporated)
• Inventors: Shin, Dong-Ryul, Cho, Pyeong-Hun
• Granted Patent: US 8,228,020 B2
• Time in Patent Office: Days
• US Class Current: 318/400.370
• CPC Class Codes: H02P 6/14 Electronic commutators
• CPC Class Codes: H02P 6/16 Circuit arrangements for detecting position
• CPC Class Codes: H02P 6/28 Arrangements for controlling current H02P6/10 takes precedence

Abstract

The present invention relates to an apparatus and method for controlling a hybrid motor, and more particularly, to an apparatus and method for controlling a hybrid motor, which uses a permanent magnet instead of a field coil for a rotor, winds a coil round a stator in a multi-phase independent parallel manner, fixes a rectifying type encoder to the rotor and connects a sensor to a driving circuit to smoothly start and rotate the hybrid motor, simplifies the configuration of the hybrid motor and reduce the manufacturing cost of the hybrid motor The apparatus for controlling a hybrid motor having a multi-phase independent parallel stator coil comprises: an encoder attached to a rotor of the hybrid motor and operated in cooperation with a sensor in order to sense the pole of the rotor; the sensor for outputting a sensor signal indicating the polo of the rotor, sensed by the encoder; a speed input unit for generating a speed instruction signal for driving the motor; a power switching circuit for generating signals for driving the motor; a drive module for receiving the speed instruction signal and the sensor signal and outputting the speed instruction signal synchronized with the sensor signal as a signal for driving the motor; a power supply for applying a DC voltage to the power switching circuit; and a logic power supply for converting the DC voltage received from the power supply into a logic voltage and applying the converted logic voltage to the drive module. When the motor has n phases, the motor includes n power switching circuits and n drive modules.

Claims

1. An apparatus for controlling a hybrid motor having a multi-phase independent parallel stator coil, comprising:

an encoder attached to a rotor of the hybrid motor and operated in cooperation with a sensor in order to sense the pole of the rotor;

the sensor for outputting a sensor signal indicating the pole of the rotor, sensed by the encoder;

a speed input unit for generating a speed instruction signal for driving the motor;

a power switching circuit for generating signals for driving the motor;

a drive module for receiving the speed instruction signal and the sensor signal and outputting the speed instruction signal synchronized with the sensor signal as a signal for driving the motor;

a power supply for applying a DC voltage to the power switching circuit; and

a logic power supply for converting the DC voltage received from the power supply into a logic voltage and applying the converted logic voltage to the drive module,

wherein when the motor has n phases, the motor includes n power switching circuits and n drive modules.

2. The apparatus according to claim 1, wherein the drive module comprises:

a processor for receiving the speed instruction signal and the sensor signal and outputting the speed instruction signal synchronized with the sensor signal;

a logic unit for combining the speed instruction signal and the sensor signal using a logic IC and outputting a motor driving signal; and

a drive for receiving the motor driving signal from the logic unit and outputting the signals for driving the power switching circuit.

3. The apparatus according to claim 1 or 2, wherein the motor includes a multi-phase independent parallel coil and respective coils for multiple phases have the same exciting condition.

4. The apparatus according to claim 1 or 2, wherein the encoder includes a light-shielding part and a light-detecting part formed on an encoder plate.

5. The apparatus according to claim 1 or 2, wherein the processor converts the speed instruction signal in the form of an analog signal into a digital signal using an A/D converter and outputs the digital speed instruction signal whenever the sensor signal is inputted.

6. The apparatus according to claim 1 or 2, wherein the power switching circuit is configured of an H bridge circuit including first, second, third and fourth switching elements.

7. The apparatus according to claim 1 or 2, wherein the stator coil of the hybrid motor is a multi-phase independent parallel coil.

8. The apparatus according to claim 7, wherein the stator coil forms an N-pole and an S-pole using the fact that the inflow of current into a coil slot is different from the outflow of current from the coil slot, and correlates with the pole of the rotor to generate a torque.

9. A method for controlling a hybrid motor, comprising the steps of:

converting an AC voltage into a DC voltage, applying the DC voltage to the hybrid motor, converting the DC voltage into a logic voltage and applying the converted logic voltage to the hybrid motor;

inputting a motor speed instruction signal of the motor;

converting the speed instruction signal into a digital signal, combining the digital speed instruction signal with a sensor signal and outputting the speed instruction signal synchronized with the sensor signal;

combining the speed instruction signal and the sensor signal and outputting signals for driving upper and lower stages of the motor;

generating signals for driving the motor using the signals for driving the upper and lower stages of the motor;

rotating the motor using the driving signals; and

generating the sensor signal indicating the pole of a rotor of the motor and allowing the program to return to the step of converting the speed instruction signal into the digital signal to re-perform the step of converting the speed instruction signal into the digital signal.

10. The method according to claim 9, wherein the motor uses a hybrid control module including a processor for receiving the speed instruction signal and the sensor signal and outputting the speed instruction signal synchronized with the sensor signal, a logic unit for combining the speed instruction signal and the sensor signal using a logic IC and outputting motor driving signals, and a driver for receiving the motor driving signals from the logic unit and outputting signals for driving a power switching circuit.