Drive device for power converter and driving method of power converter
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H03K-017/04
H02M-001/08
H03K-017/0412
H03K-017/16
H02M-003/158
H02M-001/00
출원번호
US-0355634
(2011-11-02)
등록번호
US-9806594
(2017-10-31)
국제출원번호
PCT/JP2011/075320
(2011-11-02)
§371/§102 date
20140501
(20140501)
국제공개번호
WO2013/065150
(2013-05-10)
발명자
/ 주소
Shinomoto, Yosuke
Yamada, Michio
Hatakeyama, Kazunori
Shimomugi, Takuya
출원인 / 주소
MITSUBISHI CORPORATION
대리인 / 주소
Posz Law Group, PLC
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from
A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on.
대표청구항▼
1. A drive device for a power converter, the drive device driving the power converter that includes a switching element formed from a wide bandgap semiconductor, the device comprising: a PWM-signal output unit that generates a first drive signal for driving the switching element with PWM;an on-speed
1. A drive device for a power converter, the drive device driving the power converter that includes a switching element formed from a wide bandgap semiconductor, the device comprising: a PWM-signal output unit that generates a first drive signal for driving the switching element with PWM;an on-speed reducing unit that outputs a second drive signal to the switching element in response to the first drive signal and that includes a resistor, a capacitor, a waveform generating unit, a comparator, and an AND circuit; andan off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element with a charge drawing performance higher than when the switching element is changed from off to on, whereina leading edge of the second drive signal, for turning on the switch element, includes a first change rate, a second change rate, and a third change rate, andthe second change rate, between the first and third change rate, is larger than the first and third change rates. 2. The drive device for a power converter according to claim 1, wherein the on-speed reducing unit generates the second drive signal such that a ringing that occurs due to an LC resonance due to an equivalent capacitance of the switching element is suppressed. 3. The drive device for a power converter according to claim 1, wherein the off-speed improving unit causes charge stored in an equivalent capacitance of the switching element to be discharged in response to a change of the switching element from on to off. 4. The drive device for a power converter according to claim 1, wherein when the switching element is changed from on to off, the off-speed improving unit draws charge such that an amount of charge transfer is larger than that when the switching element is changed from off to on. 5. The drive device for a power converter according to claim 1, wherein the power converter includes a plurality of the switching elements and the switching elements are driven with phases that are different relative to each other. 6. The drive device for a power converter according to claim 1, wherein the power converter is a DC/AC power converter to which an inductive load is connected as a load. 7. The drive device for a power converter according to claim 6, wherein the power converter controls a compressor. 8. The drive device for a power converter according to claim 1, wherein the leading edge of the second drive signal is changed continuously so that the drive signal changes smoothly. 9. The drive device for a power converter according to claim 1, wherein the on-speed reducing unit and the off-speed improving unit are configured to suppress ringing from the wiring inductance components and stray capacitances at the time of turn-on and turn-off of the switching element formed from the wide bandgap semiconductor. 10. The drive device for a power converter according to claim 1, wherein the on-speed reducing unit includes a low-pass filter. 11. The drive device for a power converter according to claim 10, wherein the low-pass filter includes the resistor, the inductor, and the capacitor. 12. The drive device for a power converter according to claim 1, wherein the capacitor and the resistor are connected to both a noninverting terminal of the comparator and an input of the AND circuit,the waveform generating unit is connected to an inverting terminal of the comparator, andan output of the comparator is connected to an input of the AND circuit. 13. The drive device for a power converter according to claim 1, wherein the PWM-signal output unit is electrically connected to the on-speed reducing unit and the off-speed improving unit, and the on-speed reducing unit and the off-speed reducing unit are electrically connected to the switching element. 14. The drive device for a power converter according to claim 1, further comprising a gate driving unit, wherein the PWM-signal output unit is electrically connected to the gate driving unit, the gate driving unit is electrically connected to the on-speed reducing unit and the off-speed improving unit, and the on-speed reducing unit and the off-speed reducing unit are electrically connected to the switching element. 15. A driving method of a power converter for driving the power converter that includes a switching element formed from a wide bandgap semiconductor, the method comprising: a PWM-signal outputting step of generating a drive signal that drives the switching element with PWM;an on-speed reducing step of outputting a second drive signal from an on-speed reducing unit includes a resistor, a capacitor, a waveform generating unit, a comparator, and an AND circuit to the switching element in response to the first drive signal; andan off-speed improving step of, when the switching element is changed from on to off, drawing charge from the switching element with a charge drawing performance higher than when the switching element is changed from off to on, whereina leading edge of the second drive signal, for turning on the switch element, includes a first change rate, a second change rate, and a third change rate, andthe second change rate, between the first and third change rate, is larger than the first and third change rates.
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이 특허에 인용된 특허 (9)
Kuroda, Takao, Driving transistor control circuit.
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