MATRIX CONVERTER APPARATUS

• US 20090059633A1
• Filed: 04/07/2006
• Published: 03/05/2009
• Est. Priority Date: 04/15/2005
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Yaskawa Denki
• Original Assignee: Kabushiki Kaisha Yaskawa Denki
• Inventors: Hara, Hidenori, Yamamoto, Eiji
• Granted Patent: US 7,782,643 B2
• Time in Patent Office: Days
• US Class Current: 363/126
• CPC Class Codes: H02M 5/293 using semiconductor devices only

Abstract

There is provided a matrix converter apparatus including both functions of outputting a step up voltage and outputting a step down voltage. In a matrix converter apparatus for directly connecting respective phases of a three phase alternating current power source (1) and respective phases of an output side by a bidirectional switch constituted by IGBT transistors or the like connected reversely in parallel therewith, controlling to output an alternating current power source voltage by a PWM control based on an output voltage instruction, and outputting an arbitrary direct current or alternating current voltage, respective reactors (61), (62), (63) inserted to be connected between the respective phases of the polyphase alternating current power source 1 and the bidirectional switches are included, and by controlling to ON/OFF the bidirectional switches, terminals of two or more of the reactors on a side of the bidirectional switch are shortcircuited, and thereafter opened to thereby step up an output voltage of the matrix converter apparatus. Further, when the terminals are switched from being shortcircuited to being opened, conduction paths of currents flowing in the respective reactors which have been shortcircuited are ensured by controlling to ON/OFF the bidirectional switch group (5) and a capacitor group (7).

Claims

1-11. -11. (canceled)

12. A matrix converter apparatus for directly connecting respective phases of an alternating current power source and respective phases of an output side by a bidirectional switch having a self arc suppression function, controlling to output a voltage of the alternating current power source based on an output voltage instruction by a PWM control and outputting an arbitrary direct current or alternating current voltage,

the matrix converter apparatus comprising:

respective reactors inserted to be connected between the respective phases of the alternating current power source and the bidirectional switches;

a circuit of stepping up an output voltage of the matrix converter apparatus by shortcircuitting terminals of the two or more of reactors on a side of the bidirectional switch by controlling the bidirectional switches ON/OFF and thereafter opening the bidirectional switch; and

a circuit of ensuring respective conduction paths of currents flowing in the respective reactors which have been shortcircuited when the terminals are switched from being shortcircuited to being opened.

13. The matrix converter apparatus according to claim 12, wherein

the circuit of ensuring the conduction paths comprises:

a first capacitor group for connecting respective phases on an output side of the matrix converter apparatus, and

the bidirectional switches.

18. The matrix converter apparatus according to claim 12, wherein

a direct current power source is substituted for the alternating current power source.

19. The matrix converter apparatus according to claim 12, wherein

a direct current power source is substituted for the alternating current power source, and

a reactor inserted to be connected between either one of a positive terminal side and a negative terminal side of the direct current power source and the bidirectional switches are substituted for the respective reactors.

20. The matrix converter apparatus according to claim 12, further comprising:

a detecting voltage switching apparatus for detecting the output voltage of the matrix converter apparatus when a step up voltage is outputted, and for detecting the alternating current power source voltage when a step down voltage is outputted.

21. The matrix converter apparatus according to claim 12, further comprising:

a detecting current switching apparatus for detecting an input current to the matrix converter apparatus when a step up voltage is outputted, and for detecting an output current from the matrix converter apparatus when a step down voltage is outputted.

22. The matrix converter apparatus according to claim 12, further comprising:

a gate signal outputting portion for outputting a gate signal based on an output voltage instruction; and

a gate signal switching apparatus for changing to switch respective corresponding relationships between the bidirectional switch and the gate signal when a step down voltage is outputted and when a step up voltage is outputted.

14. A matrix converter apparatus for directly connecting respective phases of an alternating current power source and respective phases on an output side by a bidirectional switch having a self arc suppression function, controlling to output a voltage of the alternating current power source by a PWM control based on an output voltage instruction, and outputting an arbitrary direct current or alternating current voltage,

the matrix converter apparatus comprising:

respective reactors inserted to be connected between the respective phases of the alternating current power source and the bidirectional switches;

a first capacitor group for connecting the respective phases of the output side of the matrix converter apparatus;

a first connecting/disconnecting circuit capable of connecting/disconnecting a connection between capacitors constituting the first capacitor group; and

a first switching apparatus for bringing the first connecting/disconnecting circuit into an ON state when a step up voltage of the matrix converter apparatus is outputted, and for bringing the first connecting/disconnecting circuit into an OFF state when a step down voltage is outputted.

15. The matrix converter apparatus according to claim 14, wherein

the first connecting/disconnecting circuit includes:

a first rectifying diode group connected to a full-wave rectifying circuit constitution; and

a first semiconductor switching element connected between positive and negative output terminals of the first rectifying diode group,

terminals on one side of the respective capacitors constituting the first capacitor group are connected to respective terminals of the respective reactors on a side of the bidirectional switch, and

terminals thereof on the other side are connected to respective series connecting portions of the first rectifying diode group.

23. The matrix converter apparatus according to claim 14, wherein

a direct current power source is substituted for the alternating current power source.

24. The matrix converter apparatus according to claim 14, wherein

a direct current power source is substituted for the alternating current power source, and

a reactor inserted to be connected between either one of a positive terminal side and a negative terminal side of the direct current power source and the bidirectional switches are substituted for the respective reactors.

25. The matrix converter apparatus according to claim 14, further comprising:

a detecting voltage switching apparatus for detecting the output voltage of the matrix converter apparatus when a step up voltage is outputted, and for detecting the alternating current power source voltage when a step down voltage is outputted.

26. The matrix converter apparatus according to claim 14, further comprising:

a detecting current switching apparatus for detecting an input current to the matrix converter apparatus when a step up voltage is outputted, and for detecting an output current from the matrix converter apparatus when a step down voltage is outputted.

27. The matrix converter apparatus according to claim 14, further comprising:

a gate signal outputting portion for outputting a gate signal based on an output voltage instruction; and

a gate signal switching apparatus for changing to switch respective corresponding relationships between the bidirectional switch and the gate signal when a step down voltage is outputted and when a step up voltage is outputted.

16. A matrix converter apparatus for directly connecting respective phases of an alternating current power source and respective phases on an output side by a bidirectional switch having a self arc suppression function, controlling to output a voltage of the alternating current power source by a PWM control based on an output voltage instruction and outputting an arbitrary direct current or alternating current voltage,

the matrix converter apparatus comprising:

a second capacitor group for connecting respective terminals of respective reactors on a side of the bidirectional switch;

a second connecting/disconnecting circuit capable of connecting/disconnecting a connection between capacitors constituting the second capacitor group; and

a second switching apparatus for bringing the second connecting/disconnecting circuit into an OFF state when a step up voltage of the matrix converter apparatus is outputted, and for bringing the second connecting/disconnecting circuit into an ON state when a step down voltage is outputted.

17. The matrix converter apparatus according to claim 16, wherein

the second connecting/disconnecting circuit includes:

a second rectifying diode group connected to a full-wave rectifying circuit constitution; and

a second semiconductor switching element connected between positive and negative output terminals of the second rectifying diode group,

terminals on one side of respective capacitors constituting the second capacitor group are connected to respective phase terminals on an output side of the matrix converter apparatus, and

terminals thereof on the other side are connected to respective series connecting portions of the second rectifying diode group.

28. The matrix converter apparatus according to claim 16, wherein

a direct current power source is substituted for the alternating current power source.

29. The matrix converter apparatus according to claim 16, further comprising:

a detecting voltage switching apparatus for detecting the output voltage of the matrix converter apparatus when a step up voltage is outputted, and for detecting the alternating current power source voltage when a step down voltage is outputted.

30. The matrix converter apparatus according to claim 16, further comprising:

a detecting current switching apparatus for detecting an input current to the matrix converter apparatus when a step up voltage is outputted, and for detecting an output current from the matrix converter apparatus when a step down voltage is outputted.

31. The matrix converter apparatus according to claim 16, further comprising:

a gate signal outputting portion for outputting a gate signal based on an output voltage instruction; and

a gate signal switching apparatus for changing to switch respective corresponding relationships between the bidirectional switch and the gate signal when a step down voltage is outputted and when a step up voltage is outputted.