Motor with electronic distributing configuration

• US 6,172,474 B1
• Filed: 05/18/1998
• Issued: 01/09/2001
• Est. Priority Date: 05/21/1997
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Gotou, Makoto
• Primary Examiner(s): MARTIN, DAVID S
• Application Number:
  US09/080,641
• Time in Patent Office: 967 Days
• Field of Search: 318/254, 318/138, 318/439, 388/800-841
• US Class Current: 318/400.01
• CPC Class Codes: H02P 6/085 in a bridge configuration
• CPC Class Codes: H02P 6/14 Electronic commutators
• CPC Class Codes: H02P 6/34 Modelling or simulation for control purposes

Abstract

A conversion control part controls a converted DC voltage of a voltage converting part. The converted DC voltage is supplied to first and second amplifying parts each including a FET power transistor. At least one of first power transistors of first power amplifying parts and at least one of second power transistors of second power amplifying parts perform a full ON operation, thereby analoguely altering a current path from the converted DC voltage of the voltage converting part to plural-phase windings. This configuration reduces powerless and vibration of a motor.

Claims

1. A motor comprising:

a rotatable member;

plural-phase windings;

a voltage supplying means including an FET switching transistor for performing high-frequency switching of a power supplying path of a DC power source to provide a converted DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means each one including a first FET power transistor for forming a current path from a negative output terminal of said voltage supplying means to one of said plural-phase windings;

Q second power amplifying means each one including a second FET power transistor for forming a current path from a positive output terminal of said voltage supplying means to one of said plural-phase windings;

altering signal forming means for producing plural-phase altering signals;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said first FET power transistors to conduct;

second distribution control means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said second FET power transistors to conduct; and

conversion control means for changing said converted DC voltage across said positive output terminal and said negative output terminal of said voltage supplying means synchronously with respect to the rotation of said rotatable member.

2. The motor in accordance with claim 1, wherein

said conversion control means includes a modulation control means for providing a modulation control signal which is synchronously actuated with respect to said rotation of said rotating member to synchronously change said converted DC voltage;

wherein said modulation control means is configured to a modulation input of said voltage supplying means.

3. The motor in accordance with claim 1, wherein

said conversion control includes modulation control means for providing a modulation control signal which is synchronously actuated with respect to the rotation of said rotating member to synchronously change said converted DC voltage;

wherein said modulation control means is configured to synchronously actuate a modulation input with the modulation control signal to power said plural-phase windings.

4. The motor in accordance with claim 1, wherein

said first distribution control means includes means for supplying first Q-phase current signals, each to a conduction control terminal of each of said Q first power amplifying means.

5. The motor in accordance with claim 4, wherein

said first distribution control means has means for varying said first Q-phase current signals in response to a command signal which provides power to said plural-phase windings.

6. The motor in accordance with claim 1, wherein

said second distribution control means includes means for supplying second Q-phase current signals, each to a conduction control terminal of each of said Q second power amplifying means.

7. The motor in accordance with claim 6, wherein

said second distribution control means has means for varying said second Q-phase current signals in response to a command signal which provides power to said plural-phase windings.

8. The motor in accordance with claim 1, wherein

said voltage supplying means includes inductive means for storing magnetic energy,

capacitive means for storing electric energy,

switching means including said FET switching transistor whose current output terminal is connected to the negative terminal of said DC power source and whose current input terminal is connected to one end of said inductive means, for performing high-frequency switching of a power supply path for replenishing the magnetic energy of said inductive means from said DC power source, and

current path forming means for forming a current path from said inductive means toward a circuit including said capacitive means by discharging electric energy corresponding to a period of non-conduction of said FET switching transistor to output said converted DC voltage across one end of said capacitive means and one end of said DC power source and supply said converted DC voltage to said Q first power amplifying means and said Q second power amplifying means.

9. The motor in accordance with claim 1, wherein

said voltage supplying means supplies said converted DC voltage to said Q first power amplifying means and said Q second power amplifying means and is configured to output said converted DC voltage at a level which is greater than the DC voltage of said DC power source.

10. The motor in accordance with claim 1, wherein

each of said Q first power amplifying means has a reverse biased first power diode connected across the current input terminal and the current output terminal of said first FET power transistor, and

each of said Q second power amplifying means has a reverse biased second power diode connected across the current input terminal and the current output terminal of said second FET power transistor,

said motor further comprising:

power switch means for interrupting a power supplying path between the positive terminal of said DC power source and the current input terminals of said Q second power amplifying means when said DC power source is turned off, and

voltage output means for outputting a rectified DC voltage obtained by rectifying plural-phase back electromotive forces of said plural-phase windings when said DC power source is turned off.

11. The motor in accordance with claim 1, further comprising:

bypass switch means for interrupting or connecting a current path between the positive output terminal of said voltage supplying means and a common terminal of said plural-phase windings, and

shut-off means for performing or stopping a supply of current to said plural-phase windings from said Q second power amplifying means.

12. The motor in accordance with claim 1, wherein

each of said first power amplifying means includes a first FET power current-mirror circuit including said first FET power transistor and each of said second power amplifying means includes a second FET power current-mirror circuit including said second FET power transistor.

13. A motor comprising:

a rotatable member;

single- or plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first FET power transistor for forming a current path from a negative output terminal of said voltage supplying means to one of said single- or plural-phase windings;

Q second power amplifying means, each one including a second FET power transistor for forming a current path from a positive output terminal of said voltage supplying means to one of said single- or plural-phase windings;

altering signal forming means for producing an altering signal;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said first FET power transistors to conduct; and

second distribution control means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means, to cause at least one of Q of said second FET power transistors to conduct;

said voltage supplying means including;

inductive means for storing magnetic energy;

capacitive means for storing electric energy;

switching means including an FET switching transistor whose current output terminal is connected to a negative terminal of a DC power source and whose current input terminal is connected to one end of said inductive means, for performing high-frequency switching of a power supply path for replenishing the magnetic energy of said inductive means from said DC power source; and

current path forming means for forming a current path from said inductive means toward a circuit including said capacitive means by discharging electric energy corresponding to a period of non-conduction of said FET switching transistor to output a converted DC voltage between one end of said capacitive means and one end of said DC power source and supply said converted DC voltage to said Q first power amplifying means and said Q second power amplifying means,

wherein said FET switching transistor, said first FET power transistors, and said second FET power transistors comprise a single integrated circuit package.

14. The motor in accordance with claim 13, further comprising conversion control means for changing said converted DC voltage of said voltage supplying means synchronously with respect to the rotation of said rotatable member.

15. The motor in accordance with claim 13, wherein

said first distribution control means and said second distribution control means include means for supplying a current signal to a conduction control terminal of one of said Q first power amplifying means and said Q second power amplifying means.

16. The motor in accordance with claim 13, wherein

each of said first power amplifying means has a reverse biased first power diode connected across the current input terminal and the current output terminal of said first FET power transistor;

and

each of said second power amplifying means has a reverse biased second power diode connected across the current input terminal and the current output terminal of said second FET power transistor,

said motor further comprising;

power switch means for interrupting a power supply path between the positive terminal of said DC power source and the current input terminals of said Q second power amplifying means when said DC power source is turned off, and

voltage output means for outputting a rectified DC voltage obtained by rectifying back electromotive force of said single- or plural-phase windings when said DC power source is turned off.

17. The motor in accordance with claim 13, wherein

said voltage supplying means is configured to be able to output said converted DC voltage across one end of said capacitive means and one end of said DC power source, said converted DC voltage being at a level which is greater than the DC voltage of said DC power source.

18. The motor in accordance with claim 13, wherein

each of said Q first power amplifying means includes a first FET power current mirror circuit including said first FET power transistor and each of said Q second power amplifying means includes a second FET power current mirror circuit including said second FET power transistor.

19. A motor comprising:

a rotatable member;

plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first FET power transistor for forming a current path from a negative output terminal of said voltage supplying means to one of said plural-phase windings;

Q second power amplifying means, each one including a second FET power transistor for forming a current path from a positive output terminal of said voltage supplying means to one of said plural-phase windings;

altering signal forming means for producing plural-phase altering signals;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said first FET power transistors to conduct;

second distribution means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said second FET power transistors to conduct;

bypass switch means having a bypass transistor for interrupting or connecting a current path between the positive output terminal of said voltage supplying means and a common terminal of said plural-phase windings;

shut-off means having a shut-off transistor for performing or stopping current flow to said plural-phase windings from said Q second power amplifying means; and

valve means permitting unidirectional conduction from a current output terminal toward a current input terminal of at least one of said second FET power transistors.

20. The motor in accordance with claim 19, wherein

said shut-off transistor is an FET shut-off transistor having a diode which permits unidirectional conduction from a current input terminal to a current output terminal of said FET shut-off transistor.

21. The motor in accordance with claim 19, further comprising conversion control means for changing the DC voltage across said positive output terminal and said negative output terminal of said voltage supplying means synchronously with respect to the rotation of said rotatable member.

22. The motor in accordance with claim 19, wherein

said first distribution control means includes means for supplying first Q-phase current signals, each to a conduction control terminal of each of said Q first power amplifying means, and

said second distribution control means includes means for supplying second Q-phase current signals, each to a conduction control terminal of each of said Q second power amplifying means.

23. The motor in accordance with claim 19, wherein

said voltage supplying means includes an FET switching transistor for performing high-frequency switching of a power supply path of a DC power source, supplies a converted DC voltage obtained by converting a DC voltage of said DC power source to said Q first power amplifying means and said Q second power amplifying means, and is configured to output said DC voltaic at a level which is greater than the DC voltage of said DC power source.

24. A motor comprising:

a rotatable member;

plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first NMOS-FET power transistor for forming a current path from a negative output terminal of said voltage supplying means to one of said plural-phase windings;

Q second power amplifying means, each one including a second PMOS-FET power transistor for forming a current path from a positive output terminal of said voltage supplying means to one of said plural-phase windings;

altering signal forming means for producing plural-phase altering signals;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said first NMOS-FET power transistors to conduct;

second distribution control means for controlling said Q said second power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said second PMOS-FET power transistors to conduct;

power switch means having a PMOS-FET power switch transistor for connecting a power supplying path from a positive terminal of a DC power source of said voltage supplying means to the current input terminals of said Q second power amplifying means when said DC power source is on, and for interrupting the power supplying path between the positive terminal of said DC power source and the current input terminals of said Q second power amplifying means when said DC power source is turned off; and

voltage output means for outputting a rectified DC voltage obtained by rectifying plural-phase back electromotive forces of said plural-phase windings when said DC power source is turned off.

25. The motor in accordance with claim 24, further comprising conversion control means for changing a DC voltage across said positive output terminal and said negative output terminal of said voltage supplying means synchronously with respect to the rotation of the rotatable member.

26. The motor in accordance with claim 24, wherein

said first distribution control means includes means for supplying first Q-phase current signals, each to a conduction control terminal of each of said Q first power amplifying means, and

said second distribution control means includes means for supplying second Q-phase current signals, each to a conduction control terminal of each of said Q second power amplifying means.

27. The motor in accordance with claim 24, wherein

said voltage supplying means includes an FET switching transistor for performing high-frequency switching of a power supply path of a DC power source, supplies a converted DC voltage obtained by converting a DC voltage of said DC power source to said Q first power amplifying means and said Q second power amplifying means, and is configured to output said converted DC voltage at a level which is greater than the DC voltage of said DC power source.

28. The motor in accordance with claim 24, wherein

said power switch means have said PMOS-FET power switch transistor having a diode which permits unidirectional conduction from a current input terminal to a current output terminal of said PMOS-FET power switch transistor.

29. A motor comprising:

a rotatable member;

plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first FET power transistor for forming a current path from a negative output terminal of said voltage supplying means to one of said plural-phase windings, each of said first power amplifying means including a first FET power current-mirror circuit including said first FET power transistor;

Q second power amplifying means, each one including a second FET power transistor for forming a current path from a positive output terminal of said voltage supplying means to one of said plural-phase windings, each of said second power amplifying means including a second FET power current-mirror circuit including said second FET power transistor;

altering signal forming means for producing plural-phase altering signals;

first distribution control means for supplying first Q-phase current signals to conduction control terminals of said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said first FET power transistors to conduct; and

second distribution control means for supplying second Q-phase current signals to conduction control terminals of said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said second FET power transistors to conduct.

30. The motor in accordance with claim 29, wherein

said voltage supplying means includes an FET switching transistor for performing high-frequency switching of a power supply path of a DC power source, supplies a DC voltage obtained by converting a DC voltage of said power source to said Q first power amplifying means and said Q second power amplifying means, and is configured to output said DC voltage larger at a level which is greater than the DC voltage of said DC power source.

31. The motor in accordance with claim 29, further comprising:

conversion control means for changing the DC voltage across said positive output terminal and said negative output terminal of said voltage supplying means synchronously with respect to the rotation of said rotatable member.

32. The motor in accordance with claim 29, wherein

each of said Q first power amplifying means has a reverse biased first power diode connected across the current input terminal and the current output terminal of said first FET power transistor, and

each of said Q second power amplifying means has a reverse biased second power diode connected across the current input terminal and the current output terminal of said second FET power transistors,

said motor further comprising:

power switch means for interrupting a power supplying path between the positive terminal of said DC power source and the current input terminal of said Q second power amplifying means when said DC power source is turned off, and

voltage output means for outputting a rectified DC voltage obtained by rectifying plural-phase back electromotive forces of said plural-phase windings when said DC power source is turned off.

33. A motor comprising:

a rotatable member;

single- or plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first FET power transistor for forming a current path from one output terminal of said voltage supplying means to one of said single- or plural-phase windings;

Q second power amplifying means, each one including a second FET power transistor for forming a current path from the other output terminal of said voltage supplying means to one of said single- or plural-phase windings;

altering signal forming means for producing an altering signal;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means; and

second distribution control means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means,

said first distribution control means including means for supplying first Q-phase current signals to conduction control terminals of said Q first power amplifying means, thereby to cause at least one of Q of said first FET power transistors to perform an ON operation in a full ON state.

34. The motor in accordance with claim 33, wherein

said first distribution control means changes a part of said first Q-phase current signals in proportion to a command signal.

35. The motor in accordance with claim 33, wherein

said second distribution control means includes means for supplying second Q-phase current signals to conduction control terminals of said Q second power amplifying means, thereby to cause at least one of Q of said second FET power transistors to perform an ON operation in a full ON state.

36. The motor in accordance with claim 33, wherein

said second distribution control means changes a part of second Q-phase current signals, to conduction control terminals of said Q second power amplifying means, in proportion to a command signal.

37. The motor in accordance with claim 33, wherein

said voltage supplying means includes an FET switching transistor for performing high-frequency switching of a power supply path of a DC power source, supplies a DC voltage obtained by converting a DC voltage of said DC power source to said Q first power amplifying means and said Q second power amplifying means, and is configured to output said DC voltage at a level which is greater than the DC voltage of said DC power source.

38. The motor in accordance with claim 33, further comprising:

conversion control means for changing DC voltage across said positive output terminal and said negative output terminal of said voltage supplying means synchronously with respect to the rotation of the rotatable member.

39. The motor in accordance with claim 33, wherein

each of said Q first power amplifying means has a reverse biased first power diode connected across the current input terminal and the current output terminal of said first FET power transistor, and

each of said Q second power amplifying means has a reverse biased second power diode connected across the current input terminal and the current output terminal of said second FET power transistor,

said motor further comprising:

power switch means for interrupting a power supplying path between the positive terminal of said DC power source and the current input terminal of said Q second power amplifying means when said DC power source is turned off, and

voltage output means for outputting a rectified DC voltage obtained by rectifying a back electromotive force of said single- or plural-phase windings when said DC power source is turned off.

40. The motor in accordance with claim 33, further comprising:

bypass switch means for interrupting or connecting a current path between the positive output terminal of said voltage supplying means and a common terminal of said single- or plural-phase windings, and

shut-off means for performing or stopping current supply to said single- or plural-phase windings from said Q second power amplifying means.

41. A motor comprising:

a rotatable member;

single- or plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first FET power transistor for forming a current path from one output terminal of said voltage supplying means to one of said single- or plural-phase windings;

Q second power amplifying means, each one including a second FET power transistor for forming a current path from the other output terminal of said voltage supplying means to one of said single- or plural-phase windings;

altering signal forming means for producing an altering signal;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means; and

second distribution control means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means;

wherein

at least one of Q first power amplifying means and Q second power amplifying means includes an FET power current-mirror circuit formed of said FET power transistor, an FET transistor and a resistor, and

said FET power current-mirror circuit is configured so that a control terminal of said FET power transistor is connected to a control terminal of said FET transistor, one terminal of the current path terminal pair of said FET transistor is connected via said resistor to one terminal of the current path terminal pair of said FET power transistor, the other terminal of the current path terminal pair of said FET transistor is connected to a conduction control terminal of said at least one power amplifying means, and the control terminal of said FET transistor is connected to the conduction control terminal of said at least one power amplifying means.

42. The motor in accordance with claim 41, wherein

said first distribution control means and said second distribution control means include means for supplying a current signal to the conduction control terminal of said FET power current-mirror circuit.

43. A motor comprising:

a rotatable member;

single- or plural-phase windings;

a voltage supplying means for supplying a DC voltage;

Q (Q is an integer of 2 or more) first power amplifying means, each one including a first FET power transistor for forming a current path from one output terminal of said voltage supplying means to one of said single- or plural-phase windings;

Q second power amplifying means, each one including a second FET power transistor for forming a current path from the other output terminal of said voltage supplying means to one of said single-or plural-phase windings;

altering signal forming means for producing an altering signal;

first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means; and

second distribution control means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means;

wherein at least one of Q of first power amplifying means and Q second power amplifying means includes an FET power current-mirror circuit formed of said FET power transistor, an FET transistor and a resistor, and

said FET power current-mirror circuit is configured so that a control terminal of said FET power transistor is connected to a control terminal of said FET transistor, one terminal of the current path terminal pair of said FET transistor is connected via said resistor to a conduction control terminal of said at least one power amplifying means, the other terminal of the current path terminal pair of said FET transistor is connected to one terminal of the current path terminal pair of said FET power transistor, and the control terminal of said FET transistor is connected to the conduction control terminal of said at least one power amplifying means.

44. The motor in accordance with claim 43, wherein

said first distribution control means and said second distribution control means include means for supplying a current signal to the conduction control terminal of said FET power current-mirror circuit.