Motor drive devices and motor drive systems.

Claims

OCR07AP1. Motor drive unit for driving reluctant switched motors, a reluctant switched motor consisting of i) a rotor arranged in a way that can rotate around a rotating shaft and with a number of protruding magnetic poles formed on the outer circumference, and ii) a stator arranged around the outer circumference of the rotor and with a number of segments formed on the inner circumference, where the winding of one phase among a number of phase windings is wound around each segment and a number of phase windings are connected in series in an ancillary shape. The motor drive unit includes an inverter section consisting of a first switch with the source connected to the power supply and a second switch with the discharge plug connected to ground, and a number of switch arms connected to the discharge plug of the first switch and the source of the second switch are connected in parallel. The diode section includes a pair of diodes for each switch arm.A diode pair i) consisting of a first diode with its anode connected to the junction between the discharge cap of the first switch tongue and the source of the second switch tongue, and a second diode with its cathode connected to the junction; and ii) consisting of a) the cathode of the first diode connected to the first junction connecting two adjacent coils in series; and b) the anode of the second diode connected to the second junction connecting two adjacent coils different from the first junction in series; and a control switch that controls the voltage to be applied to the gates of the first and second switch tongues located in the inverter section.

2. A motor drive device according to claim 1, where the motor reluctance switch is provided with a number of junctions connecting two adjacent coils in series, and a number of anodes of the first diode and a number of cathodes of the second diode located in the diode section are connected to different junctions, respectively.

3. A motor drive device according to claim 1 or 2, where the inverter section includes the first switch arm,4. The second and third switch arms are connected in parallel. The motor drive device according to claim 3, where the windings of a number of phases, including the windings of phases A, B, C, D, E, and F, are connected in series in an annular shape, and the electrical angular difference between phase A and phase F, phase F and phase E, phase E and phase D, phase D and phase C, phase C and phase B, and phase B and phase A is equal to 60 degrees, and the cathode of the first diode, connected to the first switch arm, is connected to the junction that connects the windings of phase A and the windings of phase F in series, and the anode of the second diode...

5. A motor drive device according to claim 4, where the cathode of the first diode, connected to the second switch arm, is connected to the junction connecting the coils of phase D and phase D in series, and the anode of the second diode, connected to the second switch arm, is connected to the junction connecting the coils of phase B and phase A in series.

6. A motor drive device according to claim 4 or 5,7. A motor drive device according to one of the claims 3 through 6, where the cathode of the first diode, connected to the third switch arm, is connected to the junction connecting the coils of phase C and phase B in series, and the anode of the second diode, connected to the third switch arm, is connected to the junction connecting the coils of phase F and phase E in series.

8. A motor drive device according to one of the claims 1 through 7, where the switch controller starts and stops by applying a voltage such that the electrical angular difference between the first switch tongue of the first switch arm and the second switch tongue of the second switch arm, the second switch tongue and the first switch tongue of the third switch arm, the first switch tongue and the second switch tongue of the first switch tongue of the third switch arm, the first switch tongue and the second switch tongue of the third switch arm, and the second switch tongue and the first switch tongue of the first switch arm is equal to 60 degrees.

9. A motor drive device according to one of the claims 1 through 7,Where the switch controller applies voltage to the gates of a number of first and second switch tongues located in the inverter section, which supplies an offset current, a DC current superimposed on an AC current, to the diode section.

9. A motor driver under one of the claims 1 through 8, where the switch controller includes an active section that calculates the electrical angle corresponding to the mechanical angle of the motor switch!Luxtance obtained at a predetermined cycle and specifies the gates to be voltaged at the calculated electrical angle among the gates of a number of first and second switch tongues.

10. A motor driver under claim 9,Where the integrated switch controller includes a section that specifies the torque corresponding to the amount of throttle input and specifies the frequency of the electrical output to rotate the rotor of the reluctant switch motor at a rotational speed corresponding to the torque, and the operating section performs chopper control by repeatedly starting and stopping the application of specified gate voltage and causing the inverter section to output electrical at a frequency specified by section 11. The motor drive system consists of the motor and motor drive device, where the motor is a reluctant switch motor that includes i) a rotor arranged in a way that can rotate around a rotating shaft and has a number of protruding magnetic poles formed on the outer circumference and ii) a stator arranged around the outer circumference of the rotor and has a number of segments formed on the inner circumference, where the winding of one phase among a number of phase windings is wound around each segment.The motor drive device includes the inverter section, which comprises the first switchgear with the source connected to the power supply and the second switchgear with the discharge plug connected to ground, and a number of switch arms connected in parallel to the discharge plug of the first switchgear and the source of the second switchgear; the diode section, which comprises a pair of diodes for each switch arm; a pair of diodes i) comprising the first diode with its anode connected to the junction between the discharge plug of the first switchgear and the source of the second switchgear, and the second diode with its cathode connected to the junction; and ii) comprising a) the cathode of the first diode connected to the first junction connecting two adjacent windings in series; and b) the anode of the second diode connected to the second junction connecting two adjacent windings different from the first junction in series; and a control switch that controls the voltage to be applied to the gates of the first and second switchgear located in the inverter section.

12. The motor drive system according to claim 11, in which a number of phase windings, including the windings of phase A, phase B, phase C, phase D,Phase E and phase F and the electrical angular difference between phase A and phase F, phase F and phase E, phase E and phase D, phase D and phase C, phase C and phase B and phase A are equal to 60 degrees and the windings of phase A, phase B, phase C, phase D, phase E and phase F are connected in series in a ring shape in this order.

13. Motor drive system according to claim 11, where the windings of a number of phases including the windings of phase A, phase B, phase C, phase D, phase E and phase F and the electrical angular difference between phase A and phase F, phase F and phase E, phase E and phase D, phase D and phase C, phase C and phase B and phase A are equal to 60 degrees and the windings of phase A, phase B, phase C, phase D, phase E and phase F have one end connected to the neutral point;

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