CN100356671C - Drive circuit improvement method - Google Patents

Drive circuit improvement method Download PDF

Info

Publication number
CN100356671C
CN100356671C CNB2004100564138A CN200410056413A CN100356671C CN 100356671 C CN100356671 C CN 100356671C CN B2004100564138 A CNB2004100564138 A CN B2004100564138A CN 200410056413 A CN200410056413 A CN 200410056413A CN 100356671 C CN100356671 C CN 100356671C
Authority
CN
China
Prior art keywords
switches
switch
drive circuit
conducting
pulse wave
Prior art date
Application number
CNB2004100564138A
Other languages
Chinese (zh)
Other versions
CN1731658A (en
Inventor
谢宗融
郭柏村
黄跃龙
蔡明熹
Original Assignee
台达电子工业股份有限公司
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 台达电子工业股份有限公司 filed Critical 台达电子工业股份有限公司
Priority to CNB2004100564138A priority Critical patent/CN100356671C/en
Publication of CN1731658A publication Critical patent/CN1731658A/en
Application granted granted Critical
Publication of CN100356671C publication Critical patent/CN100356671C/en

Links

Abstract

The present invention relates to a method for improving drive circuits, which is implemented by using an H bridge drive circuit, wherein the H bridge drive circuit comprises a first switch group and a second switch group which are separately composed of two switches. The method for improving drive circuits has the steps that the two switches of the first switch group are simultaneously switched on; the switching on state of one of the two switches of the first switch group is switched to a switching off state; the two switches of the second switch group are simultaneously switched on; the switching on state of the other switch of the first switch group is switched to a switching off state when the two switches of the second switching group are simultaneously switched on.

Description

Drive circuit improvement method

Technical field

The relevant a kind of drive circuit improvement method of the present invention, particularly relevant a kind of drive circuit improvement method that can effectively suppress the ripple current generation.

Background technology

Please refer to Fig. 1 and Fig. 2.Fig. 1 shows the schematic diagram of existing H bridge (H-bridge) drive circuit.Fig. 2 is a waveform schematic diagram, shows the pulse wave waveform of existing this H bridge drive circuit of input.As shown in Figure 1, this H bridge drive circuit comprises a driver element that is made of transistor Q1 and Q4, and an anti-phase driver element that is made of transistor Q2 and Q3.As pulse wave width modulation (Pulse Width Modulation; When PWM) signal generation unit (not shown) produces as shown in Figure 2 one group of pulse wave, at first, signal 1 and signal 4 can make the driver element conducting that comprises transistor Q1 and Q4, simultaneously, signal 2 and signal 3 can make the anti-phase driver element that comprises transistor Q2 and Q3 end, so electric current I is passed through coil L with path shown in the solid line in scheming.Then, this pulse wave phase change is signal 2 and signal 3 turn-on transistor Q2 and Q3, simultaneously, signal 1 and signal 4 "off" transistor Q1 and Q4, so electric current I changes with path shown in the dotted line among Fig. 1 and passes through coil L, makes rotor rotate an angle again, so driven makes the motor rotor continuous running.

Yet, as shown in Figure 2, because of existing PWM control is to drive aforementioned two groups of driver elements respectively with non-overlapped pulse wave signal, that is, synchronous by signal 1 and signal 4 by between signal 2 and signal 3 synchronous conductings, having a time difference Δ T.

Therefore, as shown in Figure 3, when the pulse wave phse conversion, for example for example in signal 1 and signal 4 synchronously by the time, this H bridge drive circuit can produce the great induced current I ' of a value in moment and enter capacitor C and form a ripple current along the path shown in the figure, the high heat that this ripple current caused can make the electric capacity life-span seriously shorten, and particularly if this capacitor C is an electrolytic capacitor, high heat more can make the rapid deterioration of its performance and shorten its life-span.

Summary of the invention

Therefore, the purpose of this invention is to provide a kind of drive circuit improvement method, it can effectively suppress ripple current and produce and avoid the aforementioned circumstances generation.

A kind of drive circuit improvement method is provided according to an aspect of the present invention, this drive circuit comprises first and second switches set that is made of two switches respectively, and respectively this switch in parallel has a choked flow assembly, this first and second switches set is the conducting of rotating, and this drive circuit improvement method comprises following steps: with the two switches conducting simultaneously of this first switches set; With two switches of this first switches set wherein a switch switch to not on-state by conducting; With the conducting simultaneously of two switches of this second switch group, and another switch that this first switches set remains conducting state is switched to not on-state in this conducting moment; With two switches of this second switch group wherein a switch switch to not on-state by conducting; And with the conducting simultaneously of two switches of this first switches set, and another switch that this second switch group remains conducting state is switched to not on-state in this conducting moment.

A kind of drive circuit improvement method is provided according to a further aspect of the invention, this drive circuit comprises first and second switches set that is made of two switches respectively, and respectively this switch in parallel has a choked flow assembly, this first and second switches set is that this drive circuit improvement method comprises following steps by the conducting of rotating of the pulse wave signal of each switch of feed-in respectively: be adjusted into the On sequential simultaneously in name a person for a particular job first and second pulse wave signal of this first switches set of feed-in of a very first time; The the 3rd and the 4th pulse wave signal of this second switch group of feed-in is adjusted into the Off sequential simultaneously; In one second time point this second pulse wave signal is adjusted into the Off sequential; In one the 3rd time point the 3rd and the 4th pulse wave signal is adjusted into the On sequential simultaneously, and simultaneously this first pulse wave signal is adjusted into the Off sequential; In one the 4th time point the 3rd pulse wave signal is adjusted into the Off sequential; And this first and second pulse wave signal is adjusted into the On sequential simultaneously, and the 4th pulse wave signal is adjusted into the Off sequential in one the 5th time point.

According to the drive circuit improvement method of the present invention's design, be to utilize a H bridge drive circuit to implement.This H bridge drive circuit comprises first and second switches set that is made of two switches respectively, and each switch in parallel has a choked flow assembly, and first and second switches set is the conducting of rotating.This drive circuit improvement method, it at first is two switches conducting simultaneously with first switches set, then with two switches of first switches set wherein a switch switch to not on-state by conducting, again with the conducting simultaneously of two switches of this second switch group, and another switch that first switches set remains conducting state is switched to not on-state in two switches conducting simultaneously moment of second switch group.

By design of the present invention, when H bridge drive circuit when different switches set are switched, the present invention switch earlier a switches set wherein a switch and make the design that another switching delay a period of time switches again, can make faradic travel path form a current circuit and no longer enter in the electric capacity, so the influence of ripple current be can significantly reduce, electric capacity useful life and fail safe improved electric capacity.

Description of drawings

Fig. 1 is for showing the schematic diagram of existing H bridge drive circuit.

Fig. 2 is a waveform schematic diagram, shows the pulse wave waveform of existing input H bridge drive circuit.

Fig. 3 is a schematic diagram, shows the induced current path of existing H bridge drive circuit.

Fig. 4 is the embodiment according to motor driven method of the present invention, shows the schematic diagram of its pulse wave signal producing method.

Fig. 5 and Fig. 6 are schematic diagram, show the faradic path that produces according to Fig. 4 embodiment respectively.

Fig. 7 is another embodiment according to motor driven method of the present invention, shows the schematic diagram of its pulse wave signal producing method.

The 8th and Fig. 9 be schematic diagram, show the faradic path that produces according to Fig. 7 embodiment respectively.

Embodiment

Please refer to Fig. 4 to Fig. 6.Fig. 4 is the embodiment according to drive circuit improvement method of the present invention, shows the schematic diagram of its pulse wave signal producing method.Fig. 5 and Fig. 6 show the path of the ripple current I ' that produces according to present embodiment respectively.As Fig. 4 and shown in Figure 5, among transistor Q1, transistor Q2, transistor Q3 and the transistor Q4 with PWM pulse wave signal 1, signal 2, signal 3 and signal 4 difference feed-in H bridge (H-bridge) drive circuits, the transistor Q1 and the transistor Q4 that are positioned at H bridge drive circuit one diagonal both sides constitute one first switches set, and the transistor Q2 of another diagonal both sides of H bridge drive circuit and transistor Q3 can constitute another anti-phase second switch group, and each transistor Q1, Q2, Q3 and Q4 are parallel with a choked flow assembly respectively, as shown in FIG. diode D1, D2, D3 and D4.According to the improvement method of present embodiment H bridge drive circuit, the pulse wave signal producing method is at first to design pulse wave signal 1 and signal 4 switches to the On sequential simultaneously, and signal 2 and signal 3 then are the Off sequential.Then, when pulse wave signal 1 and signal 4 desired to switch to the Off sequential, the present embodiment design made signal 4 switch to the Off sequential earlier, and 1 of signal postpones a period of time T1, and the moment that switches to the On sequential up to signal 2 and signal 3 simultaneously switches to the Off sequential again.

Pulse wave signal producing method by present embodiment, as shown in Figure 5, switch to the moment of not on-state by conducting as the transistor Q4 of first switches set, because of another transistor Q1 still remains conducting state (this moment, the transistor Q2 and the transistor Q3 of another switches set were all not on-state), transistor Q1, coil L, diode D3 return transistor Q1 and constitute a current circuit so induced current I ' can flow through, do not discharge and recharge action and can not enter capacitor C, ripple current is significantly reduced.

Then, the transistor Q2 and the transistor Q3 of second switch group switch to conducting state simultaneously, and switch to not on-state in this moment transistor Q1, transistor Q2 and transistor Q3 so electric current is flowed through in regular turn; Then, according to design of the present invention, when signal 2 switched to the Off sequential, 3 of signals postponed a period of time T2, and the moment that switches to the On sequential up to signal 1 and signal 4 simultaneously switches to the Off sequential again.Therefore, switch to the moment of not on-state by conducting as the transistor Q2 of second switch group, because of another transistor Q3 still remains conducting state (this moment, the transistor Q1 and the transistor Q4 of another switches set were all not on-state), so the time induced current I ' meeting as shown in Figure 6, flow through transistor Q3, coil L, diode D1 returns transistor Q3 and constitutes a current circuit, do not discharge and recharge action and can not enter capacitor C, thus, ripple current is significantly reduced.

From the above, the present invention is during by means of the switching of the different switches set of H bridge drive circuit, switch earlier a switches set wherein a switch and make the row design of switching again after a period of time of another switching delay, can make the path of induced current I ' form a current circuit and no longer enter in the capacitor C, so, the influence of ripple current be can significantly reduce, capacitor C useful life and fail safe improved capacitor C.

What the spy gave explanation is that it is transistor that the switch module in the H bridge drive circuit of the present invention does not limit, and for example is that a relay (relay) also can.

Please refer to Fig. 7 to Fig. 9.Fig. 7 is another embodiment according to drive circuit improvement method of the present invention, shows the schematic diagram of its pulse wave signal producing method.Fig. 8 and Fig. 9 show the path of the ripple current I ' that produces according to present embodiment respectively.

When pulse wave signal 1 and signal 4 desired to switch to the Off sequential, the present embodiment design made signal 1 switch to the Off sequential earlier, and 4 of signals postpone a period of time T1, and the moment that switches to the On sequential up to signal 2 and signal 3 simultaneously switches to the Off sequential again.Therefore, switch to the moment of not on-state by conducting as the transistor Q1 of first switches set, because of another transistor Q4 still remains conducting state (this moment, the transistor Q2 and the transistor Q3 of another switches set were not on-state), so induced current I ' meeting as shown in Figure 8, flow through transistor Q4, diode D2 coil L, return transistor Q4 and constitute a current circuit, do not discharge and recharge action and can not enter capacitor C, make ripple current significantly reduce.

Then, when signal 3 switched to the Off sequential, 2 of signals postponed a period of time T2, and the moment that switches to the On sequential up to signal 1 and signal 4 simultaneously switches to the Off sequential again.Therefore, switch to the moment of not on-state by conducting as the transistor Q3 of second switch group, because of another transistor Q2 still remains conducting state (this moment, the transistor Q1 and the transistor Q4 of another switches set were not on-state), so the time induced current I ' meeting as shown in Figure 9, flow through transistor Q2, diode D4, coil L, return transistor Q2 and constitute a current circuit, do not discharge and recharge action and can not enter capacitor C, ripple current is significantly reduced.

As seen from the above embodiment, the present invention switch earlier a switches set wherein a switch and make the design that another switching delay a period of time switches again, wherein select which switch to switch earlier and do not limit, all can obtain effect of the present invention.

The above only is an illustrative, but not is restricted.Anyly do not break away from spirit of the present invention and category, and, all should be contained in accompanying the application's claim scope its equivalent modifications of carrying out or change.

Claims (10)

1. drive circuit improvement method, this drive circuit comprises first and second switches set that is made of two switches respectively, and respectively this switch in parallel has a choked flow assembly, and this first and second switches set is the conducting of rotating, and this drive circuit improvement method comprises following steps:
Two switches conducting simultaneously with this first switches set;
With two switches of this first switches set wherein a switch switch to not on-state by conducting; With the conducting simultaneously of two switches of this second switch group, and another switch that this first switches set remains conducting state is switched to not on-state in this conducting moment;
With two switches of this second switch group wherein a switch switch to not on-state by conducting; And
With the conducting simultaneously of two switches of this first switches set, and another switch that this second switch group remains conducting state is switched to not on-state in this conducting moment.
2. drive circuit improvement method as claimed in claim 1 is characterized in that this drive circuit is a H bridge drive circuit.
3. drive circuit improvement method as claimed in claim 1 is characterized in that this switch is a transistor.
4. drive circuit improvement method as claimed in claim 1 is characterized in that this switch is a relay.
5. drive circuit improvement method as claimed in claim 1 is characterized in that this choked flow assembly is a diode.
6. drive circuit improvement method, this drive circuit comprises first and second switches set that is made of two switches respectively, and respectively this switch in parallel has a choked flow assembly, this first and second switches set is that this drive circuit improvement method comprises following steps by the conducting of rotating of the pulse wave signal of each switch of feed-in respectively:
Be adjusted into the On sequential simultaneously in name a person for a particular job first and second pulse wave signal of this first switches set of feed-in of a very first time;
The the 3rd and the 4th pulse wave signal of this second switch group of feed-in is adjusted into the Off sequential simultaneously;
In one second time point this second pulse wave signal is adjusted into the Off sequential;
In one the 3rd time point the 3rd and the 4th pulse wave signal is adjusted into the On sequential simultaneously, and simultaneously this first pulse wave signal is adjusted into the Off sequential;
In one the 4th time point the 3rd pulse wave signal is adjusted into the Off sequential; And
In one the 5th time point this first and second pulse wave signal is adjusted into the On sequential simultaneously, and the 4th pulse wave signal is adjusted into the Off sequential.
7. drive circuit improvement method as claimed in claim 6 is characterized in that this drive circuit is a H bridge drive circuit.
8. drive circuit improvement method as claimed in claim 6 is characterized in that this switch is a transistor.
9. drive circuit improvement method as claimed in claim 6 is characterized in that this switch is to be relay.
10. drive circuit improvement method as claimed in claim 6 is characterized in that this choked flow assembly is a diode.
CNB2004100564138A 2004-08-06 2004-08-06 Drive circuit improvement method CN100356671C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100564138A CN100356671C (en) 2004-08-06 2004-08-06 Drive circuit improvement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100564138A CN100356671C (en) 2004-08-06 2004-08-06 Drive circuit improvement method

Publications (2)

Publication Number Publication Date
CN1731658A CN1731658A (en) 2006-02-08
CN100356671C true CN100356671C (en) 2007-12-19

Family

ID=35963973

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004100564138A CN100356671C (en) 2004-08-06 2004-08-06 Drive circuit improvement method

Country Status (1)

Country Link
CN (1) CN100356671C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079587A (en) * 2006-05-23 2007-11-28 台达电子工业股份有限公司 Fan system
CN101325389B (en) * 2007-06-12 2011-11-09 台达电子工业股份有限公司 Fan system and detecting device thereof
KR101173923B1 (en) * 2007-07-03 2012-08-16 미쓰비시덴키 가부시키가이샤 Electronic element driving circuit
CN109921770A (en) * 2019-03-07 2019-06-21 维沃移动通信有限公司 A kind of motor drive circuit and terminal device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11356063A (en) * 1998-06-10 1999-12-24 Fujitsu Denso Ltd Bridge type inverter circuit
JP2000166258A (en) * 1998-11-30 2000-06-16 Stanley Electric Co Ltd Lighting device for discharge lamp
WO2000074222A1 (en) * 1999-05-27 2000-12-07 Hitachi, Ltd. H-type bridge circuit and integrated circuit
JP2001095266A (en) * 1999-09-24 2001-04-06 Fujitsu Denso Ltd H-typed bridge power source

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11356063A (en) * 1998-06-10 1999-12-24 Fujitsu Denso Ltd Bridge type inverter circuit
JP2000166258A (en) * 1998-11-30 2000-06-16 Stanley Electric Co Ltd Lighting device for discharge lamp
WO2000074222A1 (en) * 1999-05-27 2000-12-07 Hitachi, Ltd. H-type bridge circuit and integrated circuit
JP2001095266A (en) * 1999-09-24 2001-04-06 Fujitsu Denso Ltd H-typed bridge power source

Also Published As

Publication number Publication date
CN1731658A (en) 2006-02-08

Similar Documents

Publication Publication Date Title
CN102347681B (en) Apparatus for driving switching element
CN102403914B (en) Module switch, electricity inverter and the method for driving electricity inverter
CN101521459B (en) Resonant switched capacitor direct current voltage converter
EP2537239B1 (en) 3-stage pulse width modulation inverter with discharge network
CN1674423B (en) DC-DC converter
CN102069842B (en) Motor control device, electric power steering device, and vehicle steering system
CN102810973B (en) Gate driver
CN100369370C (en) Circuit and method for controlling a synchronous rectifier in a power converter
DE10336512B4 (en) Control device for PWM control of two inductive loads with reduced generation of electrical noise
US7088595B2 (en) Reversible buck-boost chopper circuit, and inverter circuit with the same
JP4450082B2 (en) Electric motor drive device and control method thereof
EP2221972B1 (en) Semiconductor switching device
EP1715582B1 (en) Circuit arrangement for driving an electric power switch at high voltage
US20110228564A1 (en) Gate drive circuit of the voltage drive type semiconductor element and power converter
JP4113436B2 (en) Gate drive device
TWI508424B (en) Solar photovoltaic power conversion system and method of operating the same
JP2005501497A (en) Method and circuit for reducing loss in a DC-DC converter
CN101790838B (en) Method for driving an electrical converter and associated apparatus
CN102223061B (en) Voltage converter
US6353543B2 (en) Switching circuit of power conversion apparatus
EP1119097B1 (en) Variable speed three-phase motor with electronic commutation
CN1228912C (en) Motor driving apparatus and motor using the same
JP2008193839A (en) Semiconductor switch and power conversion apparatus applying same
US20200014378A1 (en) Efficient igbt switching
CN205725692U (en) For driving the gate driver circuit of power switch

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2005.1.1 TO 2011.3.31; CHANGE OF CONTRACT

Name of requester: TAIDA ELECTRONICS COMPONENT( DONGGUAN ) CO., LTD.

Effective date: 20090722

EE01 Entry into force of recordation of patent licensing contract

Assignee: Delta Electronic Power Supply (Dongguan) Co., Ltd.

Assignor: Delta Optoelectronics Inc.

Contract fulfillment period: 2005.1.1 to 2011.3.31 contract change

Contract record no.: 2009990000776

Denomination of invention: Drive circuit improvement method

Granted publication date: 20071219

License type: Exclusive license

Record date: 2009.7.22