Vehicular generator-motor control apparatus

• US 7,723,933 B2
• Filed: 01/10/2007
• Issued: 05/25/2010
• Est. Priority Date: 01/12/2006
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Asao, Yoshihito, Fujita, Masahiko
• Primary Examiner(s): Ro; Bentsu
• Assistant Examiner(s): Luo; David S
• Application Number:
  US11/651,583
• Publication Number:
  US 20070182349A1
• Time in Patent Office: 1,231 Days
• Field of Search: 318/481, 318/484, 318/145, 318/141, 318/140, 388/911, 388/912
• 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:

detection means for detecting a position of a rotor; and

means for energizing a stator of the vehicular winding field type salient-pole generator-motor by applying rectangular wave voltages to the winding field type salient-pole generator-motor at conduction start angles of respective phases of the stator, wherein the conduction start angles are shifted by a predetermined angle relative to the position of the rotor detected by the detection means, and 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 winding field type salient-pole 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 of a stator coil of the stator.

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. The vehicular generator-motor control apparatus according to claim 3, wherein the field current changes in accordance with the input voltage of the DC-AC converter and the duty of the field chopper, and the means for energizing controls a torque of the winding field type salient-pole generator-motor by controlling a value of the field current.

5. The vehicular generator-motor control apparatus according to claim 3, wherein the field current is calculated with the following equation:

I_f=(V_PN·

Duty−

V_drop)/R_t0,

wherein I_f is the field current, V_PN is a voltage of a power supply, Duty is an ON duty of a field switching element, V_drop is a voltage drop of a brush, and R_t0 is a resistance at a reference temperature t0.

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 180°

.

7. 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°

.

8. 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 a torque of the winding field type salient-pole generator-motor which is determined every revolution of the rotor.

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

10. The vehicular generator-motor control apparatus according to claim 9, wherein the means for energizing utilizes the power factors for determining the rectangular wave voltages to be applied to the winding field type salient-pole generator.

11. A vehicular generator-motor control apparatus as defined in claim 1, wherein the means for energizing performs a control in a direction of decreasing a power loss of the vehicular generator-motor control apparatus.

12. A vehicular generator-motor control apparatus as defined in claim 1, wherein the detection means is a resolver.

13. A vehicular generator-motor control apparatus as defined in claim 1, wherein the detection means is an encoder.

14. A vehicular generator-motor control apparatus as defined in claim 1,

wherein the detection means detects the rotor position by calculating the revolution speed from a cycle of a rectangular wave-shaped signal waveform of the detected rotor position, and executing an interpolation of the rotor position for rotor position information items obtained from a combination of a plurality of rectangular waves among the rectangular wave-shaped signal waveform, so as to use the rotor position information items of enhanced resolution.

15. A vehicular generator-motor control apparatus as defined in claim 14, 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 interpolation of the rotor position, and the detection means for the rotor position is adjusted so as to maximize a torque of the winding field type salient-pole generator-motor.

16. The vehicular generator-motor control apparatus according to claim 1, wherein the rectangular wave voltages have a predetermined angular width, and the conduction start angles of the respective phases are shifted by the predetermined angle based on the predetermined angular width of the rectangular wave voltages.

17. The vehicular generator-motor control apparatus according to claim 1, wherein a torque of the winding field type salient-pole generator-motor is set to a desired value based on the input voltage of the DC-AC converter and the revolution speed of the winding field type salient-pole generator-motor.

18. 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 applying rectangular wave voltages to the winding field type salient-pole generator-motor at conduction start angles of respective phases of the stator, wherein the conduction start angles are shifted by a predetermined angle relative to a position of a rotor, and 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 winding field type salient-pole generator-motor; and

means for performing field weakening 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 winding field type salient-pole generator-motor.