TWI806989B - Power conversion device and air conditioner equipped with it - Google Patents

Power conversion device and air conditioner equipped with it Download PDF

Info

Publication number
TWI806989B
TWI806989B TW108108427A TW108108427A TWI806989B TW I806989 B TWI806989 B TW I806989B TW 108108427 A TW108108427 A TW 108108427A TW 108108427 A TW108108427 A TW 108108427A TW I806989 B TWI806989 B TW I806989B
Authority
TW
Taiwan
Prior art keywords
circuit
switching element
aforementioned
reverse voltage
power conversion
Prior art date
Application number
TW108108427A
Other languages
Chinese (zh)
Other versions
TW202019080A (en
Inventor
月井浩二
小倉洋寿
橋本浩之
菅原英司
Original Assignee
日商日立江森自控空調有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日商日立江森自控空調有限公司 filed Critical 日商日立江森自控空調有限公司
Publication of TW202019080A publication Critical patent/TW202019080A/en
Application granted granted Critical
Publication of TWI806989B publication Critical patent/TWI806989B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

提供一種簡單之構成且為低損失之電力轉換裝置等。逆變器(100)，係具備有：切換元件驅動電路(20)，係對於切換元件(Qa、Qb)輸出驅動訊號；和逆電壓施加電路(30a、30b)，係對於切換元件(Qa、Qb)之寄生二極體(Da、Db)或飛輪二極體施加逆電壓；和複振器(40a、40b)，係使用從切換元件驅動電路(20)所輸入至自身處之驅動訊號，來產生對於逆電壓施加電路(30a、30b)之逆電壓施加訊號。 To provide a simple configuration and low-loss power conversion device and the like. The inverter (100) is equipped with: a switching element driving circuit (20) that outputs a driving signal to the switching element (Qa, Qb); and a reverse voltage applying circuit (30a, 30b) that applies a reverse voltage to the parasitic diode (Da, Db) or flywheel diode of the switching element (Qa, Qb); A reverse voltage application signal is generated to a reverse voltage application circuit (30a, 30b).

Description

電力轉換裝置及具備此之空調機 Power conversion device and air conditioner equipped with it

本發明，係有關於電力轉換裝置等。 The present invention relates to power conversion devices and the like.

作為降低電力轉換裝置之損失的技術，例如，在專利文獻1中所記載之技術係為周知。亦即是，在專利文獻1中，係記載有一種電力轉換裝置，其係具備有被與主電路切換元件以逆並聯而作了連接的飛輪二極體、和在使此些之各飛輪二極體遮斷時，對於各飛輪二極體而施加較直流電壓源而更小的逆電壓之逆電壓施加電路。 As a technique for reducing the loss of a power conversion device, for example, the technique described in Patent Document 1 is known. That is, Patent Document 1 discloses a power conversion device including flywheel diodes connected in antiparallel to a main circuit switching element, and a reverse voltage application circuit that applies a reverse voltage smaller than that of a DC voltage source to each flywheel diode when these flywheel diodes are turned off.

[先前技術文獻] [Prior Art Literature] [專利文獻] [Patent Document]

[專利文獻1]日本專利第4204534號公報 [Patent Document 1] Japanese Patent No. 4204534

在專利文獻1所記載之技術中，如同前述一般，係藉由從逆電壓施加電路而對於飛輪二極體施加逆電壓，來謀求電力轉換裝置之損失的降低。然而，在專利文 獻1所記載之技術中，由於係成為需要用以使主電路切換控制電路和逆電壓施加電路各別動作的專用之微電腦，因此係會導致零件數量和製造成本之增加。 In the technique described in Patent Document 1, the loss of the power conversion device is reduced by applying a reverse voltage to the flywheel diode from the reverse voltage application circuit as described above. However, in the patent In the technique described in Document 1, since a dedicated microcomputer is required to separately operate the main circuit switching control circuit and the reverse voltage application circuit, the number of parts and the manufacturing cost increase.

因此，本發明，係以提供一種簡單之構成且為低損失之電力轉換裝置等一事作為課題。 Therefore, the present invention makes it a subject to provide a simple configuration and a low-loss power conversion device and the like.

為了解決前述課題，本發明之電力轉換裝置，係構成為具備有：逆電壓用驅動電路，其係被與逆電壓施加電路一對一地作連接，並且亦被與切換元件驅動電路作連接，並使用從前述切換元件驅動電路所輸入至自身處之驅動訊號，來產生對於前述逆電壓施加電路之逆電壓施加訊號。 In order to solve the aforementioned problems, the power conversion device of the present invention is configured to include a reverse voltage driving circuit which is connected one-to-one to the reverse voltage applying circuit and is also connected to the switching element driving circuit, and generates a reverse voltage applying signal to the above reverse voltage applying circuit using a driving signal input from the switching element driving circuit to itself.

若依據本發明，則係可提供一種簡單之構成且為低損失之電力轉換裝置等。 According to the present invention, it is possible to provide a simple configuration and a low-loss power conversion device and the like.

1:壓縮機 1: Compressor

2:室外熱交換器(冷凝器/蒸發器) 2: Outdoor heat exchanger (condenser/evaporator)

3:室外風扇 3: Outdoor fan

4:膨脹閥 4: Expansion valve

5:室內熱交換器(蒸發器/冷凝器) 5: Indoor heat exchanger (evaporator/condenser)

6:室內風扇 6: Indoor fan

10:逆變電路(電力轉換電路) 10: Inverter circuit (power conversion circuit)

10A:轉換電路(電力轉換電路) 10A: conversion circuit (power conversion circuit)

10u:第1引線(切換引線) 10u: 1st lead (switching lead)

10v:第2引線(切換引線) 10v: 2nd lead (toggle lead)

10w:第3引線(切換引線) 10w: 3rd lead (switch lead)

11、12:引線(切換引線) 11, 12: Lead (switch lead)

20:切換元件驅動電路 20: Switching element drive circuit

30a、30b:逆電壓施加電路 30a, 30b: reverse voltage application circuit

40a、40b:複振器(逆電壓用驅動電路) 40a, 40b: resonator (drive circuit for reverse voltage)

50、50A:控制電路 50, 50A: control circuit

60a:導通延遲電路 60a: Turn-on delay circuit

70a:通電時間設定電路 70a: Power-on time setting circuit

100、100A:逆變器(電力轉換裝置) 100, 100A: inverter (power conversion device)

200:轉換器(電力轉換裝置) 200: Converter (power conversion device)

Da、Db、Dc、Dd、De、Df:寄生二極體 Da, Db, Dc, Dd, De, Df: parasitic diodes

Da1、Db1、Dc1、Dd1、De1、Df1:飛輪二極體 Da1, Db1, Dc1, Dd1, De1, Df1: Flywheel diodes

F:冷媒迴路 F: Refrigerant circuit

M:馬達 M: motor

Qa、Qc、Qe:切換元件(上臂之切換元件) Qa, Qc, Qe: switching elements (switching elements of the upper arm)

Qb、Qd、Qf:切換元件(下臂之切換元件) Qb, Qd, Qf: switching elements (switching elements of the lower arm)

W:空調機 W: air conditioner

ha:配線(第1配線) ha: Wiring (the first wiring)

ma:配線(第2配線) ma: wiring (second wiring)

[圖1]係為身為本發明之第1實施形態的電力轉換裝置之逆變器之構成圖。 [ Fig. 1 ] is a configuration diagram of an inverter as a power conversion device according to a first embodiment of the present invention.

[圖2]係為對於在身為本發明之第1實施形態的電力轉換裝置之逆變器中之逆電壓施加電路、複振器、導通延 遲電路以及通電時間設定電路之構成作展示之電路圖。 [ Fig. 2 ] is a diagram for the reverse voltage application circuit, resonator, and conduction delay in the inverter of the power conversion device according to the first embodiment of the present invention. The circuit diagram showing the composition of the delay circuit and the power-on time setting circuit.

[圖3]係為針對關連於在身為本發明之第1實施形態的電力轉換裝置之逆變器處的逆電壓之施加之動作作展示之時序表。 [ Fig. 3 ] is a time chart showing the operation related to the application of the reverse voltage to the inverter of the power conversion device according to the first embodiment of the present invention.

[圖4]係為身為本發明之第2實施形態的電力轉換裝置之轉換器之構成圖。 [ Fig. 4 ] is a configuration diagram of a converter of a power conversion device according to a second embodiment of the present invention.

[圖5]係為本發明之第3實施形態之空調機的構成圖。 [ Fig. 5 ] is a structural diagram of an air conditioner according to a third embodiment of the present invention.

[圖6]係為身為本發明之變形例的電力轉換裝置之逆變器之構成圖。 [ Fig. 6 ] is a configuration diagram of an inverter of a power conversion device as a modified example of the present invention.

[第1實施形態] [First Embodiment] 〈逆變器之構成〉 <The structure of the inverter>

圖1，係為身為第1實施形態的電力轉換裝置之逆變器100之構成圖。逆變器100，係為將直流電壓轉換為交流電壓之電力轉換裝置。另外，作為圖1中所示之直流電源E，係亦可使用將從交流電源(未圖示)所施加的三相交流電壓藉由轉換器(未圖示)來轉換為直流電壓後者。 FIG. 1 is a configuration diagram of an inverter 100 as a power conversion device according to a first embodiment. The inverter 100 is a power conversion device that converts DC voltage into AC voltage. In addition, as the DC power supply E shown in FIG. 1 , a three-phase AC voltage applied from an AC power supply (not shown) converted into a DC voltage by a converter (not shown) may also be used.

如同圖1中所示一般，逆變器100，係除了作為主電路之逆變電路10(電力轉換電路)以外，亦具備有切換元件驅動電路20、和逆電壓施加電路30a、30b、和複振器40a、40b(逆電壓用驅動電路)、以及控制電路50。 As shown in FIG. 1 , an inverter 100 is provided with a switching element drive circuit 20, reverse voltage application circuits 30a, 30b, resonators 40a, 40b (reverse voltage drive circuit), and a control circuit 50 in addition to an inverter circuit 10 (power conversion circuit) as a main circuit.

逆變電路10，係為將從直流電源E所施加之直流電壓轉換為三相交流電壓，並將此三相交流電壓施加於馬達M處之電力轉換電路。逆變電路10，係具備有第1引線10u、和第2引線10v、以及第3引線10w。 The inverter circuit 10 is a power conversion circuit that converts the DC voltage applied from the DC power supply E into a three-phase AC voltage, and applies the three-phase AC voltage to the motor M. The inverter circuit 10 includes a first lead 10u, a second lead 10v, and a third lead 10w.

第1引線10u，係為使上臂之切換元件Qa和下臂之切換元件Qb被作連接所成的切換引線。作為此種切換元件Qa、Qb，例如，係可使用MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)。另外，關於其他之切換元件Qc、Qd、Qe、Qf，亦係相同。 The first lead 10u is a switching lead for connecting the switching element Qa of the upper arm and the switching element Qb of the lower arm. As such switching elements Qa and Qb, for example, MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) can be used. In addition, the same applies to other switching elements Qc, Qd, Qe, and Qf.

切換元件Qa之汲極係被與直流電源E之正側作連接，源極係被與切換元件Qb之汲極作連接。又，切換元件Qb之源極，係被接地。切換元件Qa之源極和切換元件Qb之汲極的連接點P1，係經由配線u而被與馬達M之U相卷線Lu作連接。 The drain of the switching element Qa is connected to the positive side of the DC power supply E, and the source is connected to the drain of the switching element Qb. Also, the source of the switching element Qb is grounded. A connection point P1 between the source of the switching element Qa and the drain of the switching element Qb is connected to the U-phase coil Lu of the motor M via the wiring u.

同樣的，第2引線10v，係具備有上臂之切換元件Qc和下臂之切換元件Qd。切換元件Qc、Qd之連接點P2，係經由配線v而被與馬達M之V相卷線Lv作連接。又，第3引線10w，係具備有上臂之切換元件Qe和下臂之切換元件Qf。切換元件Qe、Qf之連接點P3，係經由配線w而被與馬達M之W相卷線Lw作連接。 Similarly, the second lead 10v is provided with an upper arm switching element Qc and a lower arm switching element Qd. The connection point P2 of the switching elements Qc, Qd is connected to the V-phase winding line Lv of the motor M via the wiring v. Also, the third lead 10w is provided with an upper arm switching element Qe and a lower arm switching element Qf. The connection point P3 of the switching elements Qe, Qf is connected to the W-phase winding line Lw of the motor M via the wiring w.

第1引線10u、第2引線10v以及第3引線10w，係相互被作並聯連接。又，在第1引線10u、第2引線10v以及第3引線10w之兩端處，係被施加有直流電源E之電壓Vd。而，藉由基於PWM(PulseWidth Modulation)控制來使 切換元件Qa~Qf之導通/斷開被作特定之切換，係成為經由配線u、v、w而對於馬達M輸出有三相交流電力。 The first lead 10u, the second lead 10v, and the third lead 10w are mutually connected in parallel. Also, the voltage Vd of the DC power supply E is applied to both ends of the first lead 10u, the second lead 10v, and the third lead 10w. However, by controlling based on PWM (PulseWidth Modulation) The ON/OFF of the switching elements Qa~Qf are switched in a specific way, so that the three-phase AC power is output to the motor M through the wiring u, v, w.

切換元件Qa，係於其之內部具備有寄生二極體Da。寄生二極體Da，係身為存在於切換元件Qa之源極與汲極之間的pn接合之部分，並在切換元件Qa(例如，MOSFET)之製造過程中而被形成。另外，關於其他之切換元件Qb~Qf，亦係相同。 The switching element Qa has a parasitic diode Da inside it. The parasitic diode Da is part of the pn junction existing between the source and the drain of the switching element Qa, and is formed during the manufacturing process of the switching element Qa (for example, MOSFET). In addition, the same applies to other switching elements Qb to Qf.

切換元件驅動電路20，係為基於從控制電路50而來之指令而對於上下一對之切換元件Qa、Qb分別輸出特定之驅動訊號的電路。如同圖1中所示一般，切換元件驅動電路20，係經由配線ha(第1配線)，而被與切換元件Qa之閘極作連接。亦即是，與後述之逆電壓施加電路30a以一對一而相對應的切換元件Qa、和切換元件驅動電路20，係經由配線ha而被作連接。又，切換元件驅動電路20，係經由配線hb(第1配線)，而亦被與切換元件Qb之閘極作連接。 The switching element drive circuit 20 is a circuit that outputs specific drive signals to the upper and lower pair of switching elements Qa, Qb, respectively, based on commands from the control circuit 50 . As shown in FIG. 1, the switching element drive circuit 20 is connected to the gate of the switching element Qa via the wiring ha (first wiring). That is, the switching element Qa corresponding to the reverse voltage application circuit 30a described later and the switching element driving circuit 20 in one-to-one correspondence are connected via the wiring ha. In addition, the switching element drive circuit 20 is also connected to the gate of the switching element Qb via the wiring hb (first wiring).

圖1中所示之電阻Ra，係為對於從切換元件驅動電路20所輸出之驅動訊號的電壓等作調整之閘極電路，並被設置在配線ha處。另外，圖1之構成係僅為其中一例，切換元件Qa之閘極電路係並不被限定於僅藉由電阻Ra所構成。 The resistor Ra shown in FIG. 1 is a gate circuit for adjusting the voltage of the drive signal output from the switching element drive circuit 20, and is provided at the wiring ha. In addition, the configuration of FIG. 1 is only one example, and the gate circuit of the switching element Qa is not limited to being constituted only by the resistor Ra.

逆電壓施加電路30a，係為對於切換元件Qa之寄生二極體Da(或者是飛輪二極體)而施加逆電壓之電路，並以一對一而被與切換元件Qa作連接。另外，所謂 「逆電壓」，係指寄生二極體Da之逆方向電壓。逆電壓施加電路30a，係經由配線ia而被與切換元件Qa之源極作連接，並且經由配線ja而被與切換元件Qa之汲極作連接。 The reverse voltage application circuit 30a is a circuit for applying a reverse voltage to the parasitic diode Da (or flywheel diode) of the switching element Qa, and is connected to the switching element Qa one-to-one. In addition, the so-called "Reverse voltage" refers to the reverse direction voltage of the parasitic diode Da. The reverse voltage application circuit 30a is connected to the source of the switching element Qa via the wiring ia, and is connected to the drain of the switching element Qa via the wiring ja.

複振器40a，係為對於逆電壓施加電路30a而輸出特定之逆電壓施加訊號的電路，並被與逆電壓施加電路30a作連接。如同圖1中所示一般，複振器40a，係經由配線ka而被與逆電壓施加電路30a一對一地作連接，並且依序經由配線ma以及配線ha(一部分)，而亦被與切換元件驅動電路20作連接。換言之，與後述之逆電壓施加電路30a以一對一而相對應的複振器40a、和配線ha(第1配線)，係經由配線ma(第2配線)而被作連接。 The resonator 40a is a circuit that outputs a specific reverse voltage application signal to the reverse voltage application circuit 30a, and is connected to the reverse voltage application circuit 30a. As shown in FIG. 1 , the resonator 40a is connected one-to-one to the reverse voltage applying circuit 30a via the wiring ka, and is also connected to the switching element driving circuit 20 via the wiring ma and wiring ha (part) sequentially. In other words, the resonator 40a corresponding to the reverse voltage application circuit 30a described later and the wiring ha (first wiring) are connected via the wiring ma (second wiring).

而，複振器40a，係使用從切換元件驅動電路20起依序經由配線ha(第1配線)以及配線ma(第2配線)而被輸入至自身處之驅動訊號，來產生對於與逆電壓施加電路30a之逆電壓施加訊號。亦即是，複振器40a，係成為流用切換元件Qa之驅動訊號，來產生特定之逆電壓施加訊號。此係為第1實施形態的其中一個主要特徵。 Furthermore, the resonator 40a generates a reverse voltage application signal to the reverse voltage application circuit 30a using a drive signal input to itself from the switching element drive circuit 20 sequentially through the wiring ha (first wiring) and the wiring ma (second wiring). That is, the resonator 40a generates a specific reverse voltage application signal by passing the driving signal of the switching element Qa. This is one of the main features of the first embodiment.

另外，在下臂之切換元件Qb處，亦係被連接有逆電壓施加電路30b以及複振器40b。而，藉由切換元件驅動電路20所產生的驅動訊號，係經由hb而被輸出至切換元件Qb處，並且成為依序經由配線hb(一部分)以及配線mb，而亦被輸出至複振器40b處。 In addition, the reverse voltage application circuit 30b and the resonator 40b are also connected to the switching element Qb of the lower arm. And, the driving signal generated by the switching element driving circuit 20 is output to the switching element Qb via hb, and is also output to the resonator 40b via the wiring hb (part) and the wiring mb sequentially.

又，在圖1中雖係省略圖示，但是，在第2引線10v和第3引線10w之各切換元件Qc、Qd、Qe、Qf處，亦 係與第1引線10u同樣的，而被連接有切換元件驅動電路、逆電壓施加電路、複振器等。另外，與U相、V相、W相相對應之3個的切換元件驅動電路20、20、20，係可被個別地作設置，又，亦可將3相之切換元件驅動電路20、20、20封裝化為一體。 Also, although not shown in FIG. 1, at the respective switching elements Qc, Qd, Qe, and Qf of the second lead 10v and the third lead 10w, there are also switching elements Qc, Qd, Qe, and Qf. Similar to the first lead 10u, a switching element drive circuit, a reverse voltage application circuit, a resonator, and the like are connected. In addition, the three switching element driving circuits 20, 20, 20 corresponding to the U phase, V phase, and W phase can be provided individually, and the switching element driving circuits 20, 20, 20 of the three phases can also be packaged into one body.

控制電路50，例如，係身為微電腦(Microcomputer)，雖並未圖示，但是，係包含有CPU(Central Processing Unit)、ROM(Read Only Memory)、RAM(Random Access Memory)、各種介面等之電子電路，而構成之。又，係成為將被記憶在ROM中之程式讀出而展開於RAM中，並使CPU實行各種處理。控制電路50，係將基於PWM控制所致之特定之控制訊號對於切換元件驅動電路20作輸出。 The control circuit 50 is, for example, a microcomputer (Microcomputer), although it is not shown in the figure, it is composed of electronic circuits including a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and various interfaces. Also, the program stored in the ROM is read out and developed in the RAM, and the CPU executes various processes. The control circuit 50 outputs a specific control signal based on PWM control to the switching element drive circuit 20 .

圖2，係為對於逆電壓施加電路30a、複振器40a、導通延遲電路60a以及通電時間設定電路70a之構成作展示之電路圖。另外，在圖2中，係針對關連於上臂之切換元件Qa的電路作圖示，並將關於其他之切換元件Qb~Qf(參考圖1)的電路之圖示省略。又，在已作了說明的圖1中，係將導通延遲電路60a和通電時間設定電路70a之圖示省略。 FIG. 2 is a circuit diagram showing the configuration of the reverse voltage applying circuit 30a, the resonator 40a, the conduction delay circuit 60a, and the conduction time setting circuit 70a. In addition, in FIG. 2 , the circuit related to the switching element Qa of the upper arm is illustrated, and the illustration of the circuits related to the other switching elements Qb to Qf (refer to FIG. 1 ) is omitted. In addition, in FIG. 1 which has already been described, illustration of the conduction delay circuit 60a and the conduction time setting circuit 70a is omitted.

如同圖2中所示一般，逆電壓施加電路30a，係具備有二極體31、和切換手段32、以及電容器33。二極體31，係為防止電流之逆流用的元件，並被設置在配線ja處。二極體31，係使陽極被與切換手段32作連接，並使陰 極經由配線ja而被與切換元件Qa之汲極作連接。 As shown in FIG. 2 , the reverse voltage application circuit 30 a includes a diode 31 , switching means 32 , and a capacitor 33 . The diode 31 is an element for preventing the reverse flow of current, and is provided at the wiring ja. Diode 31, the anode is connected with the switching means 32, and the cathode The electrode is connected to the drain of the switching element Qa via the wiring ja.

切換手段32，係為對於電容器33和切換元件Qa之間之連接/遮斷作切換的元件，並被設置在配線ja處。又，藉由從複振器40a之「OUT」端子而來的訊號，切換手段32之導通/斷開係被作切換。作為此種切換手段32，例如，係使用有MOSFET。 The switching means 32 is an element for switching connection/disconnection between the capacitor 33 and the switching element Qa, and is provided at the wiring ja. Also, the on/off of the switching means 32 is switched by a signal from the "OUT" terminal of the resonator 40a. As such switching means 32, for example, a MOSFET is used.

電容器33，係為當切換手段32被切換為導通時，將特定之電壓作為逆電壓而施加於寄生二極體Da處的元件。電容器33，係使正側經由配線ja而被與切換元件Qa之汲極作連接，並使負側經由配線ia而被與切換元件Qa之源極作連接。另外，係亦可設置有用以對於電容器33適宜進行充電的自舉(bootstrap)電路(未圖示)。 The capacitor 33 is an element that applies a specific voltage as a reverse voltage to the parasitic diode Da when the switching means 32 is switched on. The positive side of the capacitor 33 is connected to the drain of the switching element Qa via the wiring ja, and the negative side is connected to the source of the switching element Qa via the wiring ia. In addition, a bootstrap circuit (not shown) for appropriately charging the capacitor 33 may be provided.

複振器40a，係為因應於被施加於「In」端子、「GND」端子間之電壓的變化，來從「OUT」端子而將特定之電性訊號輸出至切換手段32處之電子電路。在本實施形態中，當複振器40a檢測出了從切換元件驅動電路20所被施加的矩形波狀之電壓之下挫的情況時，係成為從「OUT」端子而對於切換手段32將導通訊號作特定時間之輸出。 The resonator 40a is an electronic circuit that outputs a specific electrical signal from the "OUT" terminal to the switching means 32 in response to changes in the voltage applied between the "In" terminal and the "GND" terminal. In this embodiment, when the resonator 40a detects a dip in the rectangular wave voltage applied from the switching element drive circuit 20, it outputs an ON signal from the "OUT" terminal to the switching means 32 for a predetermined time.

如同圖2中所示一般，複振器40a之「In」端子，係依序經由配線ma以及配線ha(一部分)而被與切換元件驅動電路20作連接，「GND」端子係被接地。又，在複振器40a之「Vcc」端子處，係經由通電時間設定電路70a而被施加有特定之電壓Vcc。複振器40a之「OUT」端子， 係經由配線ka而被與身為切換手段32之MOSFET的閘極作連接。 As shown in FIG. 2 , the "In" terminal of the resonator 40a is connected to the switching element drive circuit 20 through the wiring ma and the wiring ha (part) in order, and the "GND" terminal is grounded. Also, a specific voltage Vcc is applied to the "Vcc" terminal of the resonator 40a via the energization time setting circuit 70a. The "OUT" terminal of the resonator 40a, It is connected to the gate of the MOSFET which is the switching means 32 via the wiring ka.

導通延遲電路60a，係為設置從由切換元件驅動電路20所輸出之驅動訊號之下挫起直到在複振器40a處而逆電壓施加訊號之輸出被開始為止的特定之延遲時間之電路。在圖2所示之例中，作為導通延遲電路60a，係在將切換元件驅動電路20與複振器40a作連接的配線ma處，設置有將電阻61以及電容器62連接為L字狀所成的RC電路。 The turn-on delay circuit 60a is a circuit that sets a specific delay time from when the drive signal output from the switching element drive circuit 20 is turned off until the output of the reverse voltage application signal is started at the resonator 40a. In the example shown in FIG. 2, as the ON delay circuit 60a, an RC circuit in which a resistor 61 and a capacitor 62 are connected in an L-shape is provided at the wiring ma connecting the switching element drive circuit 20 and the resonator 40a.

若是作具體性說明，則導通延遲電路60a之電阻61，係被設置在將「In」端子和配線ha作連接的配線ma處。又，電容器62之正側，係在配線ma處而被設置於較電阻61而更靠「In」端子側處，電容器62之負側係被接地。 To describe it concretely, the resistor 61 of the on-delay circuit 60a is provided at the wiring ma connecting the "In" terminal and the wiring ha. Also, the positive side of the capacitor 62 is provided on the "In" terminal side of the resistor 61 at the wiring ma, and the negative side of the capacitor 62 is grounded.

而，藉由預先對於導通延遲電路60a之時間常數作適宜設定，係成為將從切換元件驅動電路20所輸出之矩形波狀之驅動訊號具有特定之延遲時間(on delay)地來輸出至複振器40a處。藉由此，係能夠在設計階段中對於切換元件Qa和寄生二極體Da之特性等作考慮並預先設定最適當之延遲時間。另外，圖2中所示之導通延遲電路60a之構成，係僅為其中一例，而並不被限定於此。 And, by appropriately setting the time constant of the turn-on delay circuit 60a in advance, the rectangular-wave driving signal output from the switching element driving circuit 20 is output to the resonator 40a with a specific delay time (on delay). Thereby, the optimum delay time can be preset in consideration of the characteristics of the switching element Qa and the parasitic diode Da in the design stage. In addition, the configuration of the turn-on delay circuit 60a shown in FIG. 2 is just one example, and is not limited thereto.

通電時間設定電路70a，係為設定從複振器40a所輸出的導通訊號之通電時間之電路。在圖2所示之例中，通電時間設定電路70a，係具備有電阻71、和二極體 72、以及電容器73。電阻71和二極體72係被作並聯連接，在此並聯連接體處係被串聯連接有電容器73。電容器73之正側，係被與二極體72之陽極作連接，電容器73之負側，係被與複振器40a之「Vcc」端子作連接。 The energization time setting circuit 70a is a circuit for setting the energization time of the conduction signal output from the resonator 40a. In the example shown in Figure 2, the energization time setting circuit 70a is equipped with a resistor 71 and a diode 72, and capacitor 73. The resistor 71 and the diode 72 are connected in parallel, and a capacitor 73 is connected in series at the parallel connection. The positive side of the capacitor 73 is connected to the anode of the diode 72, and the negative side of the capacitor 73 is connected to the "Vcc" terminal of the resonator 40a.

〈逆變器之動作〉 <Operation of Inverter>

圖1中所示之控制電路50，係基於成為基準之正弦波訊號(未圖示)和特定之三角波(未圖示)之間的比較結果，來產生PWM訊號(Pulse Width Modulation)。基於此PWM訊號，例如，在對應於第1引線10u之切換元件驅動電路20處，係產生有上下一對之切換元件Qa、Qb之驅動訊號。 The control circuit 50 shown in FIG. 1 generates a PWM signal (Pulse Width Modulation) based on a comparison result between a reference sine wave signal (not shown) and a specific triangular wave (not shown). Based on this PWM signal, for example, at the switching element driving circuit 20 corresponding to the first lead 10u, a driving signal for a pair of upper and lower switching elements Qa, Qb is generated.

另外，上臂之切換元件Qa之驅動訊號、和下臂之切換元件Qb之驅動訊號，係成為互補性(使導通/斷開作了略反轉)之形態。但是，由於在切換元件Qa、Qb暫時性地而雙方均成為導通狀態的情況時，係會流動大的短路電流，因此，係以不會流動此種短路電流的方式，而設定有特定之無效時間。前述之所謂無效時間，係為上臂之切換元件Qa以及下臂之切換元件Qb之雙方均成為斷開狀態的期間。另外，關於其他之第2引線10v和第3引線10w，亦為相同。 In addition, the driving signal of the switching element Qa of the upper arm and the driving signal of the switching element Qb of the lower arm are complementary (on/off slightly reversed). However, since a large short-circuit current flows when both switching elements Qa and Qb are temporarily turned on, a specific dead time is set so that such a short-circuit current does not flow. The aforementioned so-called inactive time is a period in which both the switching element Qa of the upper arm and the switching element Qb of the lower arm are in the OFF state. In addition, it is the same about other 2nd lead wire 10v and 3rd lead wire 10w.

接著，作為其中一例，針對在寄生二極體Da處所產生的逆回復電流作說明。例如，當切換元件Qa、Qd係身為導通狀態時，電流係依序經由切換元件Qa、馬達M之U相卷線Lu、V相卷線Lv以及切換元件Qd而流動。 Next, as one example, the reverse recovery current generated in the parasitic diode Da will be described. For example, when the switching elements Qa and Qd are turned on, the current flows through the switching element Qa, the U-phase coil Lu, the V-phase coil Lv of the motor M, and the switching element Qd in sequence.

於此，假設若是設為並未設置有逆電壓施加電路30a之構成，則由於在下臂之切換元件Qb被從斷開而切換為導通的瞬間，電壓Vd(大的逆電壓)係會被施加於上臂之寄生二極體Da處，因此，在此寄生二極體Da處係產生有特定之逆回復電流。此逆回復電流，由於係經由下臂之切換元件Qb而流動，因此，在此切換元件Qb處係產生有大的損失(切換損失)。為了對於此種損失作抑制，係設置有逆電壓施加電路30a。 Here, assuming that the reverse voltage application circuit 30a is not provided, since the voltage Vd (large reverse voltage) is applied to the parasitic diode Da of the upper arm at the moment when the switching element Qb of the lower arm is switched from off to on, a specific reverse recovery current is generated at the parasitic diode Da. Since this reverse return current flows through the switching element Qb of the lower arm, a large loss (switching loss) occurs in the switching element Qb. In order to suppress such loss, a reverse voltage application circuit 30a is provided.

另外，所謂「逆回復電流」，係指在被施加於寄生二極體Da(或者是飛輪二極體)處之電壓從順方向電壓而切換為逆方向電壓的瞬間所流動之電流。 In addition, the so-called "reverse recovery current" refers to the current flowing at the moment when the voltage applied to the parasitic diode Da (or flywheel diode) is switched from forward voltage to reverse voltage.

逆電壓施加電路30a，係緊接於切換元件Qa之驅動訊號下挫並進入了特定之無效時間之後，將較小之逆電壓施加於上臂之寄生二極體Da處。藉由此，來在下臂之切換元件Qb被從斷開而切換為導通之前，意圖性地在上臂之寄生二極體Da處流動較小之逆回復電流。 The reverse voltage applying circuit 30a applies a small reverse voltage to the parasitic diode Da of the upper arm immediately after the driving signal of the switching element Qa drops and enters a specific invalid time. Thereby, before the switching element Qb of the lower arm is switched from off to on, a small reverse recovery current flows intentionally through the parasitic diode Da of the upper arm.

其結果，在寄生二極體Da處而成為逆回復電流之原因的載子(電子或電洞)係被耗盡。藉由此，就算是在之後而下臂之切換元件Qb被切換為導通，亦由於在寄生二極體Da處係幾乎不會流動逆回復電流，因此係能夠對於在下臂之切換元件Qb處的損失作抑制。 As a result, the carriers (electrons or holes) that cause the reverse recovery current at the parasitic diode Da are exhausted. Thereby, even if the switching element Qb of the lower arm is switched on later, since almost no reverse recovery current flows in the parasitic diode Da, loss in the switching element Qb of the lower arm can be suppressed.

圖3，係為針對關連於在逆變器100處的逆電壓之施加之動作作展示之時序表(適宜參考圖1、圖2)。從圖3之上方起，依序對於上臂之切換元件Qa之驅動訊號、 下臂之切換元件Qb之驅動訊號、從複振器40a之「OUT」端子(參考圖2)所輸出之訊號以及從複振器40b之「OUT」端子(參考圖2)所輸出之訊號作展示。又，圖3之各橫軸，係為時間。 FIG. 3 is a timing chart showing the actions related to the application of the reverse voltage at the inverter 100 (refer to FIG. 1 and FIG. 2 as appropriate). From the top of FIG. 3 , sequentially for the driving signal of the switching element Qa of the upper arm, The driving signal of the switching element Qb of the lower arm, the signal output from the "OUT" terminal of the resonator 40a (refer to FIG. 2 ) and the signal output from the "OUT" terminal of the resonator 40b (refer to FIG. 2 ) are shown. Also, each horizontal axis in Fig. 3 represents time.

圖3中所示之「無效時間」，係為切換元件Qa、Qb之雙方均成為斷開狀態的期間。實際上，「無效時間」係為非常短的時間，但是，為了易於理解，在圖3中係將「無效時間」記載為較長的時間。 The "inactive time" shown in FIG. 3 is a period in which both switching elements Qa and Qb are in the OFF state. Actually, the "invalid time" is a very short time, however, in FIG. 3, the "invalid time" is described as a relatively long time for easy understanding.

複振器40a，在檢測出切換元件Qa之驅動訊號之下挫的情況時，係對於逆電壓施加電路30a將導通訊號作特定時間之輸出。亦即是，若是從由切換元件驅動電路20所輸出至上臂之切換元件Qa處之驅動訊號從導通而切換為斷開(時刻t1)，則複振器40a，係將此驅動訊號之下挫，具有在導通延遲電路60a處之特定之延遲時間△ta地而檢測出來。之後，從複振器40a而來之導通訊號之輸出係被開始(時刻t2)。 The resonator 40a outputs an ON signal to the reverse voltage applying circuit 30a for a predetermined time when detecting a dip in the driving signal of the switching element Qa. That is, if the driving signal output from the switching element driving circuit 20 to the switching element Qa of the upper arm is switched from on to off (time t1), the resonator 40a detects the drop of the driving signal with a specific delay time Δta at the turn-on delay circuit 60a. After that, the output of the conduction signal from the resonator 40a is started (time t2).

若是從複振器40a之「OUT」端子(參考圖2)而對於逆電壓施加電路30a之切換手段32(參考圖2)輸出有導通訊號，則此切換手段32係被切換為導通，在寄生二極體Da處係被施加有特定之逆電壓。另外，此逆電壓，係較直流電源E之電壓Vd而更小。亦即是，圖2中所示之電容器62之極板間之電壓，係較直流電源E之電壓Vd而更小。此係為為了對於在寄生二極體Da處所流動的逆回復電流之峰值作抑制之故。 If an ON signal is output from the "OUT" terminal of the resonator 40a (see FIG. 2 ) to the switching means 32 (see FIG. 2 ) of the reverse voltage applying circuit 30a, the switching means 32 is switched to conduction, and a specific reverse voltage is applied to the parasitic diode Da. In addition, this reverse voltage is smaller than the voltage Vd of the DC power supply E. That is, the voltage between the plates of the capacitor 62 shown in FIG. 2 is smaller than the voltage Vd of the DC power supply E. This is for suppressing the peak value of the reverse recovery current flowing in the parasitic diode Da.

若是在寄生二極體Da處被施加有逆電壓，則在上下一對之切換元件Qa、Qb之無效時間中，係經由寄生二極體Da以及切換元件Qb，而流動較小之逆回復電流。藉由此，存在於寄生二極體Da處之載子(電子或電洞)係暫時性地幾乎被耗盡。故而，就算是在之後而下臂之切換元件Qb被切換為導通，並在上臂之寄生二極體Da處被施加有電壓Vd，也幾乎不會有流動大的逆回復電流的情形。藉由此，係能夠將在切換元件Qb處之損失降低。 If a reverse voltage is applied to the parasitic diode Da, a small reverse recovery current flows through the parasitic diode Da and the switching element Qb during the inactive time of the upper and lower pair of switching elements Qa, Qb. By this, the carriers (electrons or holes) present at the parasitic diode Da are temporarily almost depleted. Therefore, even if the switching element Qb of the lower arm is switched on afterwards and the voltage Vd is applied to the parasitic diode Da of the upper arm, a large reverse recovery current hardly flows. Thereby, the loss at the switching element Qb can be reduced.

而，從複振器40a之「OUT」端子(參考圖2)所輸出的導通訊號，係作基於通電時間設定電路70a所致之特定時間的持續(時刻t2~t4)。其結果，逆電壓施加電路30a之切換手段32(參考圖2)之導通狀態，亦係在時刻t2~t4之期間中被持續。另外，切換手段32從導通而切換至斷開的時序，係可為從無效時間(時刻t1~t3)結束起而經過了特定時間△tb之後，又，亦可為與無效時間的結束略同時。 And, the conduction signal output from the "OUT" terminal (refer to FIG. 2 ) of the resonator 40a is continued for a specific time based on the energization time setting circuit 70a (time t2~t4). As a result, the conduction state of the switching means 32 (refer to FIG. 2 ) of the reverse voltage applying circuit 30a is also continued during the period from time t2 to t4. In addition, the timing of switching the switching means 32 from on to off may be after a specific time Δtb elapses from the end of the inactive time (time t1-t3), or may be approximately at the same time as the end of the inactive time.

如此這般，由於在切換元件Qa、Qb之無效時間中，係輸出有逆電壓施加訊號，因此，係能夠對於在寄生二極體Da處之逆回復電流適當地作抑制。 In this way, since the reverse voltage application signal is output during the inactive time of the switching elements Qa, Qb, it is possible to appropriately suppress the reverse return current at the parasitic diode Da.

另外一方之複振器40b之動作，亦係與其中一方之複振器40a相同。亦即是，在圖3中雖並未對於其之期間作圖示，但是，在將切換元件Qb之驅動訊號之下挫具有特定之延遲時間地而檢測出來的情況時，係從複振器40b之「OUT」端子來對於逆電壓施加電路30b而將導通訊 號作特定時間之輸出。藉由此，在下臂之切換元件Qb之寄生二極體Db處，係被施加有較小之逆電壓，在無效時間中係流動較小之逆回復電流。另外，關於其他之第2引線10v和第3引線10w，亦為相同。 The action of the re-vibrator 40b on the other side is also the same as that of the re-vibrator 40a on one side. That is, although the period is not shown in FIG. 3 , when the drop of the driving signal of the switching element Qb is detected with a specific delay time, the reverse voltage applying circuit 30b is turned on from the "OUT" terminal of the resonator 40b. The number is output at a specific time. As a result, a small reverse voltage is applied to the parasitic diode Db of the switching element Qb of the lower arm, and a small reverse recovery current flows during the inactive time. In addition, it is the same about other 2nd lead wire 10v and 3rd lead wire 10w.

〈效果〉 <Effect>

若依據第1實施形態，則例如係構成為在下臂之切換元件Qb被切換為導通之前，使逆電壓施加電路30a對於寄生二極體Da施加逆電壓並意圖性地流動較小之逆回復電流。故而，在下臂之切換元件Qb被切換為導通而在寄生二極體Da處被施加有電壓Vd時，係能夠對於流動大的逆回復電流的情形作抑制。藉由此，在逆變器100處之切換損失係被降低，而能夠謀求其之高效率化。又，係亦能夠對於伴隨逆回復電流之雜訊所產生的共振現象或突波電壓之發生作抑制。 According to the first embodiment, for example, before the switching element Qb of the lower arm is switched on, the reverse voltage applying circuit 30a is configured to apply a reverse voltage to the parasitic diode Da to intentionally flow a small reverse recovery current. Therefore, when the switching element Qb of the lower arm is switched on and the voltage Vd is applied to the parasitic diode Da, it is possible to suppress the flow of a large reverse recovery current. Thereby, the switching loss in the inverter 100 is reduced, and the efficiency can be improved. In addition, it is also possible to suppress the resonance phenomenon or the occurrence of surge voltage caused by the noise accompanying the reverse recovery current.

又，若依據第1實施形態，則複振器40a、40b係成為流用從切換元件驅動電路20而來之驅動訊號，來產生逆電壓施加訊號。故而，由於係並不需要另外準備被設置有被與複振器40a、40b作連接之專用之銷(未圖示)的微電腦，因此，係能夠對於零件數量和製造成本作削減。如此這般，若依據第1實施形態，則係可提供一種簡單之構成且為低損失之逆變器100。 Moreover, according to the first embodiment, the resonators 40a and 40b generate reverse voltage application signals by flowing the drive signal from the switching element drive circuit 20 . Therefore, since there is no need to separately prepare a microcomputer provided with dedicated pins (not shown) connected to the resonators 40a, 40b, the number of parts and manufacturing cost can be reduced. In this way, according to the first embodiment, it is possible to provide an inverter 100 with a simple configuration and low loss.

[第2實施形態] [Second Embodiment]

在第2實施形態中，針對具備有逆電壓施加電路30a等的轉換器200(參考圖4)作說明。另外，關於逆電壓施加電路30a和複振器40a、導通延遲電路60a(參考圖2，在圖4中係省略圖示)以及通電時間設定電路70a(參考圖2，在圖4中係省略圖示)之構成、動作，係與第1實施形態相同。故而，係針對與第1實施形態相異之部分作說明，關於重複的部分，則係省略其說明。 In the second embodiment, a converter 200 (see FIG. 4 ) including a reverse voltage application circuit 30 a and the like will be described. In addition, the configuration and operation of the reverse voltage application circuit 30a, resonator 40a, conduction delay circuit 60a (refer to FIG. 2, not shown in FIG. 4) and energization time setting circuit 70a (refer to FIG. 2, not shown in FIG. 4) are the same as those of the first embodiment. Therefore, the description will be given for the parts that are different from those of the first embodiment, and the description will be omitted for the parts that overlap.

圖4，係為身為第2實施形態的電力轉換裝置之轉換器200之構成圖。圖4中所示之轉換器200，係為將從交流電源G所施加之交流電壓轉換為直流電壓之電力轉換裝置。如同圖4中所示一般，轉換器200，係除了作為主電路之轉換電路10A以外，亦具備有電抗L1、和平滑電容器C1、和切換元件驅動電路20、和逆電壓施加電路30a、30b、和複振器40a、40b、以及控制電路50A。 FIG. 4 is a configuration diagram of a converter 200 as a power conversion device according to a second embodiment. The converter 200 shown in FIG. 4 is a power conversion device that converts an AC voltage applied from an AC power supply G into a DC voltage. As shown in FIG. 4, the converter 200, in addition to the conversion circuit 10A as the main circuit, also includes a reactance L1, a smoothing capacitor C1, a switching element drive circuit 20, reverse voltage application circuits 30a, 30b, reoscillators 40a, 40b, and a control circuit 50A.

轉換電路10A，係具備有以橋接形態而被作了連接之4個的切換元件Qa、Qb、Qc、Qd。轉換電路10A之輸入側，係被與交流電源G作連接，輸出側，係被與逆變器100作連接。另外，逆變器100，係具備有與第1實施形態(參考圖1)相同之構成。 The conversion circuit 10A includes four switching elements Qa, Qb, Qc, and Qd connected in a bridge form. The input side of the conversion circuit 10A is connected to the AC power supply G, and the output side is connected to the inverter 100 . In addition, the inverter 100 has the same configuration as that of the first embodiment (refer to FIG. 1 ).

切換元件Qa，例如，係身為MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)，並於其之內部具備有寄生二極體Da。另外，關於其他之切換元件Qb、Qc、Qd，亦係相同。 The switching element Qa is, for example, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) with a parasitic diode Da inside. In addition, the same applies to other switching elements Qb, Qc, and Qd.

圖4中所示之轉換電路10A，係為將交流電壓 轉換為直流電壓之電路，並具備有引線11、12。其中一方之引線11，係為使上臂之切換元件Qa和下臂之切換元件Qb被作連接所成的切換引線。又，另外一方之引線12，亦為相同。而，其中一方之引線11和另外一方之引線12係成為被作了並聯連接之構成。 The conversion circuit 10A shown in Fig. 4 is for converting the AC voltage The circuit for converting to DC voltage has lead wires 11 and 12. One of the lead wires 11 is a switching lead wire formed by connecting the switching element Qa of the upper arm and the switching element Qb of the lower arm. Also, the lead wire 12 of the other side is also the same. And, one of the lead wires 11 and the other of the lead wires 12 are configured to be connected in parallel.

在其中一方之引線11處，切換元件Qa之源極和切換元件Qb之汲極係被作連接，其之連接點N1，係經由配線p1而被與交流電源G作連接。在另外一方之引線12處，切換元件Qc之源極和切換元件Qd之汲極係被作連接，其之連接點N2，係經由配線p2而被與交流電源G作連接。 At one of the leads 11, the source of the switching element Qa and the drain of the switching element Qb are connected, and their connection point N1 is connected to the AC power supply G through the wiring p1. The source of the switching element Qc and the drain of the switching element Qd are connected to the other lead 12, and the connection point N2 thereof is connected to the AC power supply G via the wiring p2.

切換元件Qa之汲極和切換元件Qc之汲極，係被相互作連接，其之連接點N3，係經由配線p3而被與逆變器100作連接。又，切換元件Qb之源極和切換元件Qd之源極，係被相互作連接，其之連接點N4，係經由配線p4而被與逆變器100作連接，並且被作接地。 The drain of the switching element Qa and the drain of the switching element Qc are connected to each other, and their connection point N3 is connected to the inverter 100 through the wiring p3. In addition, the source of the switching element Qb and the source of the switching element Qd are connected to each other, and their connection point N4 is connected to the inverter 100 through the wiring p4 and grounded.

電抗L1，係為將從交流電源G所供給而來之電力作為能量而積蓄，並藉由將此能量放出來進行升壓或功率因數之改善者。電抗L1，係被設置在將交流電源G和轉換電路10A作連接之配線p1處。 The reactance L1 stores the power supplied from the AC power supply G as energy, and releases the energy to boost the voltage or improve the power factor. The reactance L1 is provided at the wiring p1 connecting the AC power supply G and the conversion circuit 10A.

平滑電容器C1，係為將從轉換電路10A所施加之電壓平滑化者。平滑電容器C1，係使正側被與配線p3作連接，並使負側被與配線p4作連接。 The smoothing capacitor C1 smoothes the voltage applied from the conversion circuit 10A. In the smoothing capacitor C1, the positive side is connected to the wiring p3, and the negative side is connected to the wiring p4.

控制電路50A，例如係為微電腦，並對於切 換元件驅動電路20輸出特定之控制訊號。另外，關於控制電路50A所實行之處理，由於係為周知，因此係將其說明省略。 The control circuit 50A is, for example, a microcomputer, and for switching The component replacement drive circuit 20 outputs specific control signals. Note that, since the processing performed by the control circuit 50A is well known, description thereof will be omitted.

而，複振器40a，係成為流用從切換元件驅動電路20而至切換元件Qa之驅動訊號，來產生逆電壓施加訊號。逆電壓施加電路30a，係基於前述之逆電壓施加訊號，來在切換元件Qa、Qb之無效時間中，將較小之逆電壓施加於寄生二極體Da處。藉由此，係能夠謀求轉換器200之簡單化，並且能夠降低切換損失。 Furthermore, the resonator 40a generates a reverse voltage application signal by flowing the driving signal from the switching element driving circuit 20 to the switching element Qa. The reverse voltage applying circuit 30a applies a small reverse voltage to the parasitic diode Da during the inactive time of the switching elements Qa, Qb based on the aforementioned reverse voltage applying signal. Thereby, while achieving simplification of the converter 200, switching loss can be reduced.

另外，在圖4中，雖係對於被與其中一方之引線11作連接的切換元件驅動電路20、逆電壓施加電路30a、30b以及複振器40a、40b有所圖示，但是，在另外一方之引線12處亦係被連接有相同之電路。 In addition, in FIG. 4, although the switching element driving circuit 20, the reverse voltage application circuits 30a, 30b, and the resonators 40a, 40b connected to one of the lead wires 11 are shown, the same circuit is also connected to the other lead wire 12.

〈效果〉 <Effect>

若依據第2實施形態，則複振器40a、40b係流用從切換元件驅動電路20而來之驅動訊號，來產生逆電壓施加訊號。藉由此，係可提供一種簡單之構成且為低損失之轉換器200。 According to the second embodiment, the resonators 40a, 40b use the driving signal from the switching element driving circuit 20 to generate the reverse voltage application signal. Thereby, the converter 200 with a simple structure and low loss can be provided.

[第3實施形態] [third embodiment]

在第3實施形態中，針對具備有在第1實施形態中所作了說明的逆變器100(參考圖1)以及在第2實施形態中所作了說明的轉換器200(參考圖4)之空調機W(參考圖5)作說 明。另外，關於逆變器100之構成，係與第1實施形態相同，關於轉換器200之構成，係與第2實施形態相同，因此，係省略此些之說明。 In the third embodiment, an air conditioner W (refer to FIG. 5 ) including the inverter 100 (refer to FIG. 1 ) described in the first embodiment and the converter 200 (refer to FIG. 4 ) described in the second embodiment will be described. bright. In addition, the configuration of the inverter 100 is the same as that of the first embodiment, and the configuration of the converter 200 is the same as that of the second embodiment, and therefore descriptions thereof will be omitted.

圖5，係為第3實施形態之空調機W的構成圖。空調機W，係為進行特定之空調之機器。以下，係將空調機W作為主要進行冷氣運轉者來進行說明，但是，係並不被限定於此。如同圖5中所示一般，空調機W，係具備有壓縮機1、和室外熱交換器2、和室外風扇3、和膨脹閥4、和室內熱交換器5、和室內風扇6、和逆變器100、以及轉換器200。又，圖5中所示之冷媒迴路F，係成為使壓縮機1、室外熱交換器2、膨脹閥4以及室內熱交換器5經由配管q來以環狀而依序作連接所成的構成。 Fig. 5 is a structural diagram of an air conditioner W according to a third embodiment. An air conditioner W is a machine that performs specific air conditioning. Hereinafter, although the air conditioner W is mainly performed as a person who performs cooling operation, it demonstrates, However, It is not limited to this. As shown in FIG. 5 , the air conditioner W includes a compressor 1, an outdoor heat exchanger 2, an outdoor fan 3, an expansion valve 4, an indoor heat exchanger 5, an indoor fan 6, an inverter 100, and a converter 200. Also, the refrigerant circuit F shown in FIG. 5 has a structure in which the compressor 1, the outdoor heat exchanger 2, the expansion valve 4, and the indoor heat exchanger 5 are sequentially connected in a loop through a pipe q.

壓縮機1，係身為將氣體裝置之冷媒壓縮的機器，並具備有身為驅動源之馬達M。另外，在圖5中雖係省略，但是，在壓縮機1之吸入側處，係被設置有用以將冷媒作氣液分離之積蓄器。 The compressor 1 is a machine for compressing the refrigerant of the gas device, and has a motor M as a driving source. In addition, although it is omitted in FIG. 5 , an accumulator for separating the refrigerant into gas and liquid is provided on the suction side of the compressor 1 .

逆變器100和轉換器200，係為進行特定之電力轉換並將電力轉換後之電力對於壓縮機1之馬達M作輸出之電力轉換裝置。室外熱交換器2，係為使在其之導熱管(未圖示)中所流通之冷媒和從室外風扇3所送入之外氣之間進行熱交換的熱交換器。室外風扇3，係為將外氣送入至室外熱交換器2中的風扇，並被設置在室外熱交換器2之附近處。 The inverter 100 and the converter 200 are power conversion devices that perform specific power conversion and output the converted power to the motor M of the compressor 1 . The outdoor heat exchanger 2 is a heat exchanger for exchanging heat between the refrigerant flowing through its heat pipe (not shown) and the outside air sent in from the outdoor fan 3 . The outdoor fan 3 is a fan that sends outside air into the outdoor heat exchanger 2 and is installed near the outdoor heat exchanger 2 .

膨脹閥4，係為將藉由室外熱交換器2(冷凝 器)所作了冷凝的冷媒減壓之閥。而，在膨脹閥4處而被作了減壓的冷媒，係成為被導引至室內熱交換器5(蒸發器)處。 The expansion valve 4 is used to pass through the outdoor heat exchanger 2 (condensing Device) made a condensed refrigerant decompression valve. On the other hand, the refrigerant decompressed by the expansion valve 4 is guided to the indoor heat exchanger 5 (evaporator).

室內熱交換器5，係為使在其之導熱管(未圖示)中所流通之冷媒和從室內風扇6所送入之室內空氣(空調對象空間之空氣)之間進行熱交換的熱交換器。室內風扇6，係為將室內空氣送入至室內熱交換器5中的風扇，並被設置在室內熱交換器5之附近處。 The indoor heat exchanger 5 is a heat exchanger for exchanging heat between the refrigerant flowing through its heat pipe (not shown) and the indoor air (air in the air-conditioned space) sent in from the indoor fan 6 . The indoor fan 6 is a fan that sends indoor air into the indoor heat exchanger 5 and is installed near the indoor heat exchanger 5 .

在圖5所示之例中，壓縮機1、室外熱交換器2、室外風扇3、逆變器100以及轉換器200，係被設置在室外機Uo處。另一方面，室內熱交換器5和室內風扇6，係被設置在室內機Ui處。 In the example shown in FIG. 5, the compressor 1, the outdoor heat exchanger 2, the outdoor fan 3, the inverter 100, and the converter 200 are installed at the outdoor unit Uo. On the other hand, the indoor heat exchanger 5 and the indoor fan 6 are provided at the indoor unit Ui.

而，例如，在冷氣運轉中，於冷媒迴路F處，係成為依序經由壓縮機1、室外熱交換器2(冷凝器)、膨脹閥4以及室內熱交換器5(蒸發器)，而以冷凍循環來使冷媒循環。 And, for example, in air-cooling operation, at the refrigerant circuit F, the refrigerant is circulated in a refrigeration cycle through the compressor 1, the outdoor heat exchanger 2 (condenser), the expansion valve 4, and the indoor heat exchanger 5 (evaporator) in sequence.

另外，空調機W之構成，係並不被限定於圖5之例。例如，係亦可使對於冷媒之流路作切換的四方向閥(未圖示)被設置在冷媒迴路F處。在此種構成中，於暖氣運轉時，係依序經由壓縮機1、室內熱交換器5(冷凝器)、膨脹閥4以及室外熱交換器2(蒸發器)，而以冷凍循環來使冷媒循環。亦即是，在依序經由壓縮機1、「冷凝器」、「膨脹閥」以及「蒸發器」而使冷媒流通的冷媒迴路F中，「冷凝器」以及「蒸發器」之其中一方，係為室 外熱交換器2，另外一方，係為室內熱交換器5。 In addition, the configuration of the air conditioner W is not limited to the example shown in FIG. 5 . For example, a four-way valve (not shown) for switching the flow path of the refrigerant may be provided in the refrigerant circuit F. In this configuration, during heating operation, the refrigerant is circulated in a refrigeration cycle through the compressor 1, the indoor heat exchanger 5 (condenser), the expansion valve 4, and the outdoor heat exchanger 2 (evaporator) in sequence. That is to say, in the refrigerant circuit F in which the refrigerant circulates through the compressor 1, the "condenser", the "expansion valve" and the "evaporator" in sequence, one of the "condenser" and the "evaporator" is the chamber The other side of the external heat exchanger 2 is the indoor heat exchanger 5 .

〈效果〉 <Effect>

若依據第3實施形態，則空調機W，係具備有與第1實施形態相同之構成的逆變器100，並且係具備有與第2實施形態相同之構成的轉換器200。藉由此，係可提供一種能源效率(APF：Annual Performance Factor)為高並且信賴性為高之空調機W。 According to the third embodiment, the air conditioner W includes the inverter 100 having the same configuration as the first embodiment, and also includes the converter 200 having the same configuration as the second embodiment. Thereby, an air conditioner W with high energy efficiency (APF: Annual Performance Factor) and high reliability can be provided.

≪變形例≫ ≪Modification≫

以上，雖係針對本發明之逆變器100(參考圖1)、轉換器200(參考圖4)以及空調機W(參考圖5)而基於各實施形態來作了說明，但是，本發明係並不被限定於此些之記載，而能夠進行各種的變更。例如，係亦可如同以下所說明一般地，在第1實施形態所說明之構成中追加飛輪二極體Da1~Df1(參考圖6)。 Although the inverter 100 (see FIG. 1 ), the converter 200 (see FIG. 4 ), and the air conditioner W (see FIG. 5 ) of the present invention have been described above based on the respective embodiments, the present invention is not limited to these descriptions, and various modifications are possible. For example, it is also possible to add flywheel diodes Da1 to Df1 (refer to FIG. 6 ) to the configuration described in the first embodiment as described below.

圖6，係為身為變形例的電力轉換裝置之逆變器100A之構成圖。如同圖6中所示一般，係亦可對於切換元件Qa，而逆並聯地連接有飛輪二極體Da1。在此種構成中，由逆電壓施加電路30a所致之逆電壓，係被施加於寄生二極體Da處，並且亦被施加於飛輪二極體Da1處。另外，關於被與其他之切換元件Qb~Qf作連接的飛輪二極體Db1~Df1，亦係相同。若依據圖6中所示之構成，則由於係能夠對於在寄生二極體Da~Df處之逆回復電流作抑 制，並且亦能夠對於在飛輪二極體Da1~Df1處之逆回復電流作抑制，因此，係能夠謀求逆變器100A之構成的簡單化和低損失化。另外，此點，針對第2實施形態之轉換器200(參考圖4)，係亦為相同。 FIG. 6 is a configuration diagram of an inverter 100A as a modified example of a power conversion device. As shown in FIG. 6, a flywheel diode Da1 may be connected in antiparallel to the switching element Qa. In this configuration, the reverse voltage generated by the reverse voltage applying circuit 30a is applied to the parasitic diode Da, and is also applied to the flywheel diode Da1. In addition, the same applies to the flywheel diodes Db1 to Df1 connected to other switching elements Qb to Qf. According to the structure shown in Figure 6, since it can suppress the reverse recovery current at the parasitic diodes Da~Df control, and can also suppress the reverse recovery current at the flywheel diodes Da1~Df1, therefore, it is possible to simplify the structure of the inverter 100A and reduce the loss. In addition, this point is also the same with respect to the converter 200 (refer FIG. 4) of 2nd Embodiment.

又，在第1實施形態中，雖係針對切換元件Qa~Qf(參考圖1)係均身為MOSFET的情況來作了說明，但是，係並不被限定於此。例如，切換元件Qa~Qf，係亦可身為像是IGBT(Insulated Gate Bipolor Transisto)一般之其他種類的元件。又，作為切換元件Qa~Qf，係亦可使相異種類之元件混合存在。又，係亦可身為在並不存在有寄生二極體之種類的切換元件處，分別將飛輪二極體以逆並聯來作連接之構成。另外，此點，針對第2實施形態和第3實施形態，係亦為相同。 In addition, in the first embodiment, although the switching elements Qa to Qf (refer to FIG. 1 ) are all described as MOSFETs, the description is not limited thereto. For example, the switching elements Qa˜Qf can also be other types of elements such as IGBT (Insulated Gate Bipolor Transisto). In addition, as the switching elements Qa to Qf, elements of different types may be mixed. In addition, it may also be a configuration in which flywheel diodes are connected in antiparallel to switching elements of the type that do not have parasitic diodes. In addition, this point is also the same about 2nd Embodiment and 3rd Embodiment.

又，在第1實施形態中，雖係針對逆變器100(參考圖1)係身為雙電平三相逆變器的情況來作了說明，但是，係並不被限定於此。例如，係亦可將第1實施形態之構成適用於三電平之逆變器中，又，係亦可適用於單相逆變器中。又，在第2實施形態中所作了說明的轉換器200(參考圖4)之構成，係亦僅為其中一例，而並不被限定於此。 In addition, in the first embodiment, the case where the inverter 100 (see FIG. 1 ) is a two-level three-phase inverter has been described, but it is not limited thereto. For example, the configuration of the first embodiment can also be applied to a three-level inverter, and can also be applied to a single-phase inverter. In addition, the structure of the converter 200 (refer FIG. 4) demonstrated in 2nd Embodiment is only one example, and it is not limited to this.

又，在第3實施形態中，雖係針對具備有在第1實施形態中所作了說明的逆變器100(參考圖1)以及在第2實施形態中所作了說明的轉換器200(參考圖4)之空調機W(參考圖5)來作了說明，但是，係並不被限定於此。亦 即是，係亦可僅將第1實施形態以及第2實施形態之其中一者適用於空調機W中。 In addition, in the third embodiment, the air conditioner W (refer to FIG. 5 ) including the inverter 100 (refer to FIG. 1 ) described in the first embodiment and the converter 200 (refer to FIG. 4 ) described in the second embodiment has been described, but it is not limited thereto. as well as That is, it is also possible to apply only one of 1st Embodiment and 2nd Embodiment to the air conditioner W.

又，在第3實施形態中，雖係針對室內機Ui(參考圖5)以及室外機Uo(參考圖5)為各被設置有1台的構成之空調機W來作了說明，但是，係並不被限定於此。例如，係亦可對於具備有複數台之室外機的多工型之空調機，而適用各實施形態。 In addition, in the third embodiment, although the indoor unit Ui (refer to FIG. 5 ) and the outdoor unit Uo (refer to FIG. 5 ) are described as air conditioners W each having one configuration, the system is not limited thereto. For example, each of the embodiments can be applied to a multiple-type air conditioner including a plurality of outdoor units.

又，在第3實施形態中，雖係針對具備有逆變器100以及轉換器200之空調機W(參考圖5)來作了說明，但是，係亦可對於冰箱、熱水機、洗衣機等之其他機器作適用。 Also, in the third embodiment, the air conditioner W (refer to FIG. 5 ) provided with the inverter 100 and the converter 200 has been described, but it can also be applied to other appliances such as refrigerators, water heaters, and washing machines.

又，實施形態，係為為了對於本發明作易於理解之說明而作了詳細記載者，本發明係並不被限定於包含有所說明了的全部之構成者。又，係可針對實施形態之構成的一部分，而進行其他之構成的追加、削除、置換。又，前述之機構及構成，係代表被視為在進行說明時所需要者，在製品上，係並非絕對會對於全部的機構及構成作標示。 Furthermore, the embodiments are described in detail for the sake of easy understanding of the present invention, and the present invention is not limited to the ones including all the described configurations. In addition, addition, deletion, and replacement of other configurations can be performed on a part of the configurations of the embodiments. In addition, the above-mentioned mechanisms and configurations represent those considered necessary for the explanation, and not all the mechanisms and configurations are absolutely indicated on the finished product.

10:逆變電路(電力轉換電路) 10: Inverter circuit (power conversion circuit)

10u:第1引線(切換引線) 10u: 1st lead (switching lead)

10v:第2引線(切換引線) 10v: 2nd lead (toggle lead)

10w:第3引線(切換引線) 10w: 3rd lead (switch lead)

20:切換元件驅動電路 20: Switching element drive circuit

30a、30b:逆電壓施加電路 30a, 30b: reverse voltage application circuit

40a、40b:複振器(逆電壓用驅動電路) 40a, 40b: resonator (drive circuit for reverse voltage)

50:控制電路 50: Control circuit

100:逆變器(電力轉換裝置) 100: Inverter (power conversion device)

Da、Db、Dc、Dd、De、Df:寄生二極體 Da, Db, Dc, Dd, De, Df: parasitic diodes

E:直流電源 E: DC power supply

M:馬達 M: motor

Qa、Qc、Qe:切換元件(上臂之切換元件) Qa, Qc, Qe: switching elements (switching elements of the upper arm)

Qb、Qd、Qf:切換元件(下臂之切換元件) Qb, Qd, Qf: switching elements (switching elements of the lower arm)

ha:配線(第1配線) ha: Wiring (the first wiring)

hb:配線 hb: Wiring

ma:配線(第2配線) ma: wiring (second wiring)

mb:配線 mb: Wiring

ia、ja、ka:配線 ia, ja, ka: Wiring

Ra:電阻 Ra: resistance

P1、P2、P3:連接點 P1, P2, P3: connection points

Lu:U相卷線 Lu: U phase coil

Lv:V相卷線 Lv: V-phase winding wire

Lw:W相卷線 Lw:W phase winding wire

u、v、w:配線 u, v, w: Wiring

Vd:電壓 Vd: Voltage

Claims (7)

一種電力轉換裝置，其特徵為，係具備有：電力轉換電路，係具有使上臂之切換元件和下臂之切換元件被作連接所成的切換引線，各別的前述切換元件，係具備有寄生二極體，或者是在各別的前述切換元件處，飛輪二極體係被逆並聯地作連接，該電力轉換裝置，係更進而具備有：切換元件驅動電路，係對於各個的前述切換元件輸出驅動訊號；和逆電壓施加電路，係被與前述切換元件一對一地作連接，並對於前述切換元件之前述寄生二極體或前述飛輪二極體施加逆電壓；和逆電壓用驅動電路，係被與前述逆電壓施加電路一對一地作連接，並且亦被與前述切換元件驅動電路作連接，而使用從前述切換元件驅動電路所輸入至自身處之前述驅動訊號，來產生對於前述逆電壓施加電路之逆電壓施加訊號；和通電時間設定電路，係設定前述逆電壓施加訊號之通電時間，前述通電時間設定電路，係具備有使電子元件與二極體被作並聯連接所成之並聯連接體、和被與前述並聯連接體作串聯連接之電容器， 前述電容器之正側，係被與前述二極體之陽極作連接，前述電容器之負側，係被與前述逆電壓用驅動電路之電源端子作連接。 A power conversion device is characterized in that it is provided with: a power conversion circuit having a switching lead for connecting a switching element of an upper arm and a switching element of a lower arm; each of the aforementioned switching elements is provided with a parasitic diode, or a flywheel diode system is connected in anti-parallel at each of the aforementioned switching elements; connected, and apply a reverse voltage to the aforementioned parasitic diode or the aforementioned flywheel diode of the aforementioned switching element; and the driving circuit for reverse voltage is connected one-to-one with the aforementioned reverse voltage applying circuit, and is also connected to the aforementioned switching element driving circuit, and uses the aforementioned driving signal input from the aforementioned switching element driving circuit to itself to generate a reverse voltage applying signal to the aforementioned reverse voltage applying circuit; Parallel connections formed by electronic components and diodes connected in parallel, and capacitors connected in series with the aforementioned parallel connections, The positive side of the capacitor is connected to the anode of the diode, and the negative side of the capacitor is connected to the power supply terminal of the reverse voltage drive circuit. 如申請專利範圍第1項所記載之電力轉換裝置，其中，與前述逆電壓施加電路一對一地相對應之前述切換元件、和前述切換元件驅動電路，係經由第1配線而被作連接，與前述逆電壓施加電路一對一地相對應之前述逆電壓用驅動電路、和前述第1配線，係經由第2配線而被作連接，前述逆電壓用驅動電路，係使用從前述切換元件驅動電路而依序經由前述第1配線以及前述第2配線所輸入至自身處之前述驅動訊號，來產生前述逆電壓施加訊號。 The power conversion device described in claim 1, wherein the switching element corresponding one-to-one to the reverse voltage applying circuit and the switching element driving circuit are connected via a first wiring, the driving circuit for reverse voltage corresponding to the reverse voltage applying circuit one-to-one and the first wiring are connected via a second wiring, and the driving circuit for reverse voltage uses the above-mentioned input from the switching element driving circuit sequentially via the first wiring and the second wiring to itself. driving signal to generate the aforementioned reverse voltage application signal. 如申請專利範圍第1項所記載之電力轉換裝置，其中，係更進而具備有：導通延遲電路，係設置從由前述切換元件驅動電路所輸出之前述驅動訊號之下挫起直到在前述逆電壓用驅動電路處而前述逆電壓施加訊號之輸出被開始為止的特定之延遲時間，前述導通延遲電路，係被設置在將前述切換元件驅動 電路和前述逆電壓用驅動電路作連接的配線處。 The power conversion device as described in claim 1 of the scope of the patent application further includes: a turn-on delay circuit that sets a specific delay time from when the drive signal output by the switching element drive circuit is set until the output of the reverse voltage application signal is started at the drive circuit for reverse voltage, and the conduction delay circuit is provided to drive the switch element. The circuit and the aforementioned reverse voltage are used as the wiring for connection with the drive circuit. 如申請專利範圍第1項所記載之電力轉換裝置，其中，在上臂之前述切換元件以及下臂之前述切換元件的雙方均成為斷開狀態的特定之失效時間(dead time)中，前述逆電壓施加訊號係成為導通狀態。 In the power conversion device described in claim 1, the reverse voltage application signal is turned on during a specific dead time when both the switching element of the upper arm and the switching element of the lower arm are turned off. 如申請專利範圍第1~4項中之任一項所記載之電力轉換裝置，其中，前述電力轉換電路，係具備有被作了並聯連接的複數之前述切換引線，並身為將直流電壓轉換為交流電壓之逆變電路。 The power conversion device as described in any one of items 1 to 4 of the scope of application, wherein the aforementioned power conversion circuit is equipped with a plurality of the aforementioned switching leads connected in parallel, and is an inverter circuit that converts DC voltage into AC voltage. 如申請專利範圍第1~4項中之任一項所記載之電力轉換裝置，其中，前述電力轉換電路，係具備有被作了並聯連接的複數之前述切換引線，並身為將交流電壓轉換為直流電壓之轉換電路。 The power conversion device as described in any one of items 1 to 4 of the scope of application, wherein the aforementioned power conversion circuit is equipped with a plurality of the aforementioned switching leads connected in parallel, and is a conversion circuit that converts AC voltage into DC voltage. 一種空調機，其特徵為，係包含有：依序經由壓縮機、冷凝器、膨脹閥以及蒸發器而使冷媒循環之冷媒迴路；和進行特定之電力轉換，並將電力轉換後之電路對於前 述壓縮機之馬達作輸出之電力轉換裝置，前述電力轉換裝置，係具備有：電力轉換電路，係具有使上臂之切換元件和下臂之切換元件被作連接所成的切換引線，各別的前述切換元件，係具備有寄生二極體，或者是在各別的前述切換元件處，飛輪二極體係被逆並聯地作連接，該電力轉換裝置，係更進而具備有：切換元件驅動電路，係對於各個的前述切換元件輸出驅動訊號；和逆電壓施加電路，係被與前述切換元件一對一地作連接，並對於前述切換元件之前述寄生二極體或前述飛輪二極體施加逆電壓；和逆電壓用驅動電路，係被與前述逆電壓施加電路一對一地作連接，並且亦被與前述切換元件驅動電路作連接，而使用從前述切換元件驅動電路所輸入至自身處之前述驅動訊號，來產生對於前述逆電壓施加電路之逆電壓施加訊號；和通電時間設定電路，係設定前述逆電壓施加訊號之通電時間，前述通電時間設定電路，係具備有使電子元件與二極體被作並聯連接所成之並聯連接體、和被與前述並聯連接體作串聯連接之電容器，前述電容器之正側，係被與前述二極體之陽極作連 接，前述電容器之負側，係被與前述逆電壓用驅動電路之電源端子作連接。 An air conditioner, characterized in that it includes: a refrigerant circuit that circulates the refrigerant through a compressor, a condenser, an expansion valve, and an evaporator in sequence; and performs specific power conversion, and converts the power converted circuit to the previous The motor of the compressor is used as an output power conversion device. The power conversion device is equipped with: a power conversion circuit with switching leads that connect the switching elements of the upper arm and the switching elements of the lower arm. connected one-to-one with the aforementioned switching element, and apply a reverse voltage to the aforementioned parasitic diode or the aforementioned flywheel diode of the aforementioned switching element; and a driving circuit for reverse voltage, which is connected one-to-one to the aforementioned reverse voltage applying circuit, and is also connected to the aforementioned switching element driving circuit, and uses the aforementioned driving signal input from the aforementioned switching element driving circuit to itself to generate a reverse voltage applying signal to the aforementioned reverse voltage applying circuit; The setting circuit is equipped with a parallel connection formed by connecting the electronic components and the diode in parallel, and a capacitor connected in series with the parallel connection, and the positive side of the capacitor is connected to the anode of the diode Then, the negative side of the aforementioned capacitor is connected to the power supply terminal of the aforementioned reverse voltage driving circuit.
TW108108427A 2018-10-31 2019-03-13 Power conversion device and air conditioner equipped with it TWI806989B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOPCT/JP2018/040619 2018-10-31
PCT/JP2018/040619 WO2020090068A1 (en) 2018-10-31 2018-10-31 Power conversion device and air conditioner equipped with same

Publications (2)

Publication Number Publication Date
TW202019080A TW202019080A (en) 2020-05-16
TWI806989B true TWI806989B (en) 2023-07-01

Family

ID=70463659

Family Applications (1)

Application Number Title Priority Date Filing Date
TW108108427A TWI806989B (en) 2018-10-31 2019-03-13 Power conversion device and air conditioner equipped with it

Country Status (2)

Country Link
TW (1) TWI806989B (en)
WO (1) WO2020090068A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200631296A (en) * 2004-11-15 2006-09-01 Toshiba Kk Power conversion apparatus
WO2007032238A1 (en) * 2005-09-13 2007-03-22 Toshiba Carrier Corporation Power converter
JP2007209098A (en) * 2006-01-31 2007-08-16 Toshiba Kyaria Kk Inverter device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200631296A (en) * 2004-11-15 2006-09-01 Toshiba Kk Power conversion apparatus
WO2007032238A1 (en) * 2005-09-13 2007-03-22 Toshiba Carrier Corporation Power converter
JP2007209098A (en) * 2006-01-31 2007-08-16 Toshiba Kyaria Kk Inverter device

Also Published As

Publication number Publication date
TW202019080A (en) 2020-05-16
WO2020090068A1 (en) 2020-05-07

Similar Documents

Publication Publication Date Title
JP5584357B2 (en) Variable speed drive
JP5444381B2 (en) System for precharging a DC link in a variable speed drive
US7005829B2 (en) System for precharging a DC link in a variable speed drive
JP6212571B2 (en) Hybrid pulse width modulation method for variable speed drive
US7555912B2 (en) System for precharging a DC link in a variable speed drive
JP4935251B2 (en) Power converter
TWI806989B (en) Power conversion device and air conditioner equipped with it
TWI810255B (en) Power conversion device and air conditioner equipped with it
JP6518506B2 (en) POWER SUPPLY DEVICE AND AIR CONDITIONER USING SAME
JP7340606B2 (en) Power conversion equipment, motor control equipment, and air conditioners
WO2021166111A1 (en) Dc power supply device and refrigeration cycle application device
WO2021064785A1 (en) Dc power supply device, power conversion system, and air conditioner
CN116848773A (en) Power conversion device and air conditioner
JP2017060210A (en) Drive circuit, refrigeration cycle, and home electric appliance