Vehicular generator-motor control apparatus

• US 20070182349A1
• Filed: 01/10/2007
• Published: 08/09/2007
• Est. Priority Date: 01/12/2006
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Asao, Yoshihito, Fujita, Masahiko
• Granted Patent: US 7,723,933 B2
• Time in Patent Office: Days
• US Class Current: 318/145
• CPC Class Codes: F02N 11/04 the motors being associated with current generators
• CPC Class Codes: F02N 2011/0874 characterised by said switch being an electronic switch
• CPC Class Codes: H02P 2101/45 for motor vehicles, e.g. car alternators
• CPC Class Codes: H02P 6/14 Electronic commutators
• CPC Class Codes: H02P 9/24 due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator

Abstract

A vehicular generator-motor control apparatus wherein a winding field type salient-pole generator-motor 1 (in FIG. 1) for a vehicle is subjected to a conduction control by a DC-AC converter 2, characterized in that a stator 1A of the vehicular winding field type salient-pole generator-motor 1 is energized by rectangular wave voltages at those conduction start angles δ of respective phases of the stator 1A which are shifted a predetermined angle relative to a rotor position, and that the conduction start angles δ of the respective phases change substantially continuously in accordance with an input voltage of the DC-AC converter 2 and a revolution speed of the generator-motor 2.

Claims

1. A vehicular generator-motor control apparatus wherein a winding field type salient-pole generator-motor for a vehicle is subjected to a conduction control by a DC-AC converter, comprising means for energizing a stator of the vehicular winding field type salient-pole generator-motor by rectangular wave voltages at those conduction start angles of respective phases of the stator which are shifted a predetermined angle relative to a rotor position, wherein the conduction start angles of the respective phases change substantially continuously in accordance with an input voltage of the DC-AC converter and a revolution speed of the generator-motor.

2. A vehicular generator-motor control apparatus as defined in claim 1, wherein the conduction start angles of the respective phases change depending upon a detected temperature.

3. A vehicular generator-motor control apparatus as defined in claim 1, wherein the conduction start angles of the respective phases change depending upon the input voltage of the DC-AC converter, a field current, and a duty of a field chopper.

4. A vehicular generator-motor control apparatus as defined in claim 1, wherein field weakening is performed by changing a current of a winding field in accordance with the input voltage of the DC-AC converter and the revolution speed of the generator-motor.

5. A vehicular generator-motor control apparatus as defined in claim 1, wherein a conduction width of phase voltages of the respective phases of the stator is 180°

.

6. A vehicular generator-motor control apparatus as defined in claim 1, wherein a conduction width of phase voltages of the respective phases of the stator is 120°

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7. A vehicular generator-motor control apparatus as defined in claim 1, wherein the conduction start angles of the respective phases change so as to maximize the torque which is determined every revolution number.

8. A vehicular generator-motor control apparatus as defined in claim 1, wherein fundamental waves of the phase voltages and fundamental waves of phase currents are controlled so that power factors may become substantially one.

9. A vehicular generator-motor control apparatus as defined in claim 1, wherein a control is performed in a direction of decreasing a loss of a whole system.

10. A vehicular generator-motor control apparatus as defined in claim 1, wherein the rotor position is detected by a resolver.

11. A vehicular generator-motor control apparatus as defined in claim 1, wherein the rotor position is detected by an encoder.

12. A vehicular generator-motor control apparatus as defined in claim 1, wherein detection means for the rotor position calculates the revolution speed from a cycle of a rectangular wave-shaped signal waveform of the detected rotor position, and it executes an interpolation of the rotor position for rotor position information items obtained from a combination of a plurality of rectangular waves, so as to use the rotor position of enhanced resolution.

13. A vehicular generator-motor control apparatus as defined in claim 12, wherein in a case where a revolution speed of a rotor is zero, a stator voltage is subjected to a rectangular wave control in synchronism with a leading edge or a trailing edge of the rectangular wave-shaped signal waveform without executing the angular interpolation of the rotor position, and the detection means for the rotor position is adjusted so as to maximize the torque on this occasion.