Apparatus and method for controlling hybrid motor

• US 8,228,020 B2
• Filed: 01/10/2007
• Issued: 07/24/2012
• 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
• Primary Examiner(s): Leykin, Rita
• Application Number:
  US12/159,643
• Publication Number:
  US 20090072776A1
• Time in Patent Office: 2,022 Days
• Field of Search: 310/156.1, 310/184, 310/154.02, 310/191, 310/199, 310/181, 310/173, 310/179, 310/180, 318/400.37, 318/400.01, 318/799, 318/800, 318/801, 318/803, 318/823, 318/700, 318/711, 318/712, 318/186, 318/798
• US Class Current: 318/799
• 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

An apparatus and method for controlling a hybrid motor, The hybrid motor, 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. The apparatus comprises: an encoder attached to a rotor in cooperation with a pole sensor a speed input unit for generating a speed instruction signal a power switching circuit to generate motor driving signals; a drive module receiving the speed instruction signal and the sensor signal and outputting the speed instruction signal synchronized with the sensor signal as a driving motor signal; a power supply for applying a DC voltage to the power switching circuit; A logic power supply for converting the DC voltage into a logic voltage, and applying logic voltage to the drive module. The motor has n phases, 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 first sensor signal and a second sensor signal, each of the first sensor signal and the second sensor signal indicating the pole of the rotor, sensed by the encoder;

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

a power switching circuit for generating signals for driving the motor, wherein the power switching circuit is configured of an H bridge circuit including a first switching element, a second switching element, a third switching element, and a fourth switching element;

a drive module for receiving the first speed instruction signal, the second speed instruction signal, the first sensor signal and the second sensor signal, and outputting the first speed instruction signal and the second speed instruction signal synchronized with the first sensor signal and the second sensor signal, directly to the power switching circuit as a signal for driving the power switching circuit,

wherein the drive module comprises a processor for receiving the first speed instruction signal, the second speed instruction signal, the first sensor signal and the second sensor signal, and

a logic unit for combining the first speed instruction signal with the first sensor signal, and the second speed instruction signal with the second sensor signal, 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,

wherein the logic unit comprises a first inverter, a second inverter, a third inverter, a fourth inverter, a first AND gate, and a second AND gate,

wherein the first AND gate receives the first speed instruction signal from the processor and receives the first sensor signal from the sensor through the first inverter, and performs a logic AND operation on the first speed instruction signal and the inverted first sensor signal, and outputs a first resultant signal,

wherein the second inverter inverts the inverted first sensor signal and outputs a second resultant signal,

wherein the second AND gate receives the second speed instruction signal from the processor and receives the second sensor signal from the sensor through the third inverter, and performs a logic AND operation on the speed instruction signal and the inverted second sensor signal, and outputs a third resultant signal,

wherein the fourth inverter inverts the inverted second sensor signal and outputs a fourth resultant signal,

wherein the drive receives the first resultant signal, the second resultant signal, the third resultant signal, and the fourth resultant signal as the motor driving signal from the logic unit, and outputs a first drive output signal, a second drive output signal, a third drive output signal, and a fourth drive output signal to the power switching circuit for driving the power switching circuit,

wherein the drive comprises, a first Integrated Circuit (IC) and a second IC, the first IC receiving the first resultant signal and the third resultant signal from the logic unit, and outputting the first drive output signal for driving the first switching element and the third drive output signal for driving the third switching element, the second IC receiving the second resultant signal and the fourth resultant signal from the logic unit, and outputting the second drive output signal for driving the second switching element and the fourth drive output signal for driving the fourth switching element,

wherein the H bridge circuit is configured to include the first switching element and the third switching element linearly in a first line and the second switching element and the fourth switching element linearly in a second line, such that the first line and the second line are in parallel position, and wherein the first switching element and the second switching element are facing directly each other, and the third switching element and the fourth switching element are facing directly each other;

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, and

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.

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

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

4. The apparatus according to claim 1, 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.

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

6. A method for controlling a hybrid motor having a multi-phase independent parallel stator coil, the method comprising the steps of:

(a) transforming an AC voltage into a DC voltage and applying the DC voltage to a logic power supply and a power switching circuit, and converting the DC voltage into a logic voltage and applying the logic voltage to a drive module;

(b) inputting a first speed instruction signal and a second speed instruction signal of the hybrid motor to a processor of the drive module;

(c) converting the first speed instruction signal and the second speed instruction signal into a first digital signal and the second digital signal, combining the first speed instruction signal and a first sensor signal received from a sensor, and the second speed instruction signal and a second sensor signal received from the sensor and outputting the first speed instruction signal synchronized with the first sensor signal and the second speed instruction signal synchronized with the second sensor signal to a logic unit;

(d) combining the first and the second speed instruction signals received from the processor and the first and the second sensor signals received from the sensor and outputting the combined signals to a drive unit;

(e) driving the signals outputted from the drive unit to output signals directly to the power switching circuit for driving the power switching circuit, wherein the power switching circuit is configured of an H bridge circuit including a first switching element, a second switching element, a third switching element, and a fourth switching element,

wherein the logic unit comprises a first inverter, a second inverter, a third inverter, a fourth inverter, a first AND gate, and a second AND gate,

wherein the first AND gate receives the first speed instruction signal from the processor and receives the first sensor signal from the sensor through the first inverter, and performs a logic AND operation on the first speed instruction signal and the inverted first sensor signal, and outputs a first resultant signal,

wherein the second inverter inverts the inverted first sensor signal and outputs a second resultant signal,

wherein the second AND gate receives the second speed instruction signal from the processor and receives the second sensor signal from the sensor through the third inverter, and performs a logic AND operation on the speed instruction signal and the inverted second sensor signal, and outputs a third resultant signal,

wherein the fourth inverter inverts the inverted second sensor signal and outputs a fourth resultant signal,

wherein the drive receives the first resultant signal, the second resultant signal, the third resultant signal, and the fourth resultant signal as the motor driving signal from the logic unit, and outputs a first drive output signal, a second drive output signal, a third drive output signal, and a fourth drive output signal to the power switching circuit for driving the power switching circuit,

wherein the drive comprises, a first Integrated Circuit (IC) and a second IC, the first IC receiving the first resultant signal and the third resultant signal from the logic unit, and outputting the first drive output signal for driving the first switching element and the third drive output signal for driving the third switching element, the second IC receiving the second resultant signal and the fourth resultant signal from the logic unit, and outputting the second drive output signal for driving the second switching element and the fourth drive output signal for driving the fourth switching element,

wherein the H bridge circuit is configured to include the first switching element and the third switching element linearly in a first line and the second switching element and the fourth switching element linearly in a second line, such that the first line and the second line are in parallel position, and wherein the first switching element and the second switching element are facing directly each other, and the third switching element and the fourth switching element are facing directly each other;

(f) the power switching circuit being switched by the signals from the drive unit to output signal for driving a rotor;

(g) the rotor being rotated by the signals outputted from the power switching circuit, thereby the hybrid motor being rotated; and

(h) outputting the first and the second sensor signals from the sensor, wherein the first and the second sensor signals indicate a pole of the rotor of the motor to return to the step (c),

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.