CN110957920A - Drive unit for a converter and converter thereof - Google Patents
Drive unit for a converter and converter thereof Download PDFInfo
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- CN110957920A CN110957920A CN201911201839.0A CN201911201839A CN110957920A CN 110957920 A CN110957920 A CN 110957920A CN 201911201839 A CN201911201839 A CN 201911201839A CN 110957920 A CN110957920 A CN 110957920A
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- 238000002955 isolation Methods 0.000 claims abstract description 43
- 238000004804 winding Methods 0.000 claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000009499 grossing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a driving unit for a converter, which comprises a processing control module, a plurality of isolation modules, a plurality of driving realization modules and a power supply module, wherein the processing control module is used for controlling the processing control module to work; the control processing module respectively outputs a plurality of processed and controlled driving signals to the plurality of isolation modules; the plurality of isolation modules transmit the isolated signals to corresponding drive realization modules, and the drive realization modules configure the output ends corresponding to the signals into a high-resistance or low-resistance state according to the received signals; the power supply module converts input power supply voltage, provides a first power supply output end and a second power supply output end which are isolated from each other and not connected to the ground, and respectively supplies power to components arranged at two ends of the isolation module in the driving unit. The invention also relates to a converter. The driving unit for the converter and the converter thereof have the following beneficial effects: it does not need extra auxiliary power supply, convenient to use.
Description
Technical Field
The present invention relates to the field of power electronics, and more particularly, to a driving unit for a converter and a converter thereof.
Background
For a conventional driving chip or driving unit for a converter, an input driving signal is mainly subjected to some conversion (for example, waveform arrangement, etc.) and then output or converted into a set form for output, and the output can directly drive an IGBT or an MOS transistor, so as to buffer, impedance conversion, or reduce impact of a switching device on a control unit to a certain extent. Generally, the conventional driver chip (e.g., IR2103) needs to be configured with an external power supply according to its usage, and in many cases, there is not only one power supply but also each power supply may be required, which makes it necessary to separately provide a power supply or a load power supply for the driver chip in many cases. In addition, the existing driving chip usually has no isolation of ground potential, which not only adds difficulty to the setting of its auxiliary power supply, but also may cause inconvenience in use. For example, if the above-described driver chip is used on the secondary side of the transformer in synchronous rectification, the problem of separation of an additional ground potential is involved. Therefore, in the prior art, the use of the driving chip requires the addition of an additional separately designed auxiliary power supply, and is inconvenient or difficult to use in some use occasions.
Disclosure of Invention
The present invention is directed to a driving unit for an inverter and an inverter thereof, which are convenient to use and do not require an additional auxiliary power source, and solve the above-mentioned problems of the prior art that require an additional auxiliary power source and are inconvenient to use in many situations.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a driving unit for a converter, which comprises a processing control module, a plurality of isolation modules, a plurality of driving realization modules and a power supply module; the control processing module processes and controls the input initial driving signals and respectively outputs a plurality of processed and controlled driving signals to the plurality of isolation modules; the plurality of isolation modules transmit the received signals to the other isolated end of the isolation modules and transmit the signals to corresponding drive realization modules, and the drive realization modules configure the output ends corresponding to the signals into a high-resistance or low-resistance state according to the received signals; the power supply module converts input power supply voltage, provides a first power supply output end and a second power supply output end which are isolated from each other and not connected to the ground, and respectively supplies power to components arranged at two ends of the isolation module in the driving unit.
Furthermore, the power module comprises a transformer, a switching tube and a rectifying unit, wherein the switching tube converts input power voltage into pulses applied to a primary winding of the transformer, and a plurality of windings on a secondary side of the transformer respectively sense the pulse signals and enable the pulse signals to be independently output after passing through the respective rectifying units.
Furthermore, the secondary winding of the transformer comprises a first secondary winding and a second secondary winding, one end of the first secondary winding and one end of the second secondary winding are respectively connected to the positive electrode of the rectifying diode, the negative electrode of the rectifying diode is respectively connected with one end of the filter capacitor, the other end of the filter capacitor is respectively connected with the other end of the secondary winding where the filter capacitor is located, and the other ends of the secondary windings are respectively set to different ground potentials.
Furthermore, the other end of the first secondary winding is connected to the ground potential of the input power voltage, and the first power output end and the input power voltage are connected to the same ground; the first power output end also supplies power to the processing control module.
Furthermore, the output ends of the control processing module, the isolation module and the drive realization module are in one-to-one correspondence.
Furthermore, the driving implementation module comprises an operational amplifier and an MOS tube, wherein the operational amplifier is used for waveform sorting and level conversion, and the operational amplifier carries out waveform sorting and level conversion on the signals output by the isolation module and then transmits the signals to a grid electrode of the MOS tube.
Furthermore, the operational amplifier is powered directly or after conversion by the second power supply end.
Furthermore, the isolation module comprises a photoelectric coupler, and the light emitting end of the photoelectric coupler is powered by the first power output end or is grounded with the first power output end; and the light receiving end of the photoelectric coupler is powered by the second power output end or is grounded together with the second power output end.
Furthermore, in the driving unit, the driving unit is integrated into an integrated circuit except the transformer, and the ends of the primary winding and the secondary winding of the transformer form the driving unit with the integrated circuit through a setting pin reserved on the integrated circuit.
The invention also relates to a converter, which uses a driving unit on the primary side of a transformer to realize the control of a switch network or uses a driving unit on the secondary side of the transformer to realize the control of a rectifying module, wherein the driving unit comprises any one of the driving units.
The driving unit for the converter and the converter thereof have the following beneficial effects: because the driving unit is provided with the power supply module, and simultaneously, the power supply module converts the input power supply voltage into a plurality of paths (at least two paths) of independent power supply outputs which are not in common with the ground, the driving unit can be conveniently used in a switching control scene at the primary side or a rectifying control scene at the secondary side without an external power supply even under the condition of isolation, such as transmission from the primary side of a transformer to the secondary side or the reverse condition; meanwhile, the two paths of power supplies which are not connected with the ground are convenient for supplying power to the processing control module of the driving unit, the number of external power supplies or leads of the external power supplies is further reduced, and the design of the whole converter is convenient. Therefore, the device does not need an additional auxiliary power supply and is convenient to use.
Drawings
FIG. 1 is a schematic diagram of the construction of a drive unit for an inverter and its inverter embodiments of the present invention;
FIG. 2 is a more detailed structural diagram of the driving unit in the embodiment;
FIG. 3 is a circuit diagram of a drive implementation module in the embodiment;
FIG. 4 is a circuit diagram of a power supply module in one case of the embodiment;
fig. 5 is a schematic diagram of the power supply connection of the drive unit in one case of the embodiment.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, in the embodiment of the driving unit for the inverter and the inverter of the present invention, a driving unit whose power module includes two output power sources and whose driving signal includes two independent input signals is described as an example. In some cases, the above situation is sufficient to illustrate most usage scenarios in a converter, for example, in many cases, the drive usually comprises a high side driver (high side driver) or a low side driver (low side driver), respectively outputting different drive signals. In this embodiment, the driving unit includes all the components of the high-side driver and the low-side driver, and also includes other components serving the two drivers, such as a power module or an isolation module. Of course, the driving unit in the present invention is not limited to the above case, and may also be used in many other usage scenarios, for example, when there is only one driving signal (only one switching device) or when there are multiple driving signals (for example, when there is a full-bridge topology), the driving unit may also be implemented by simply adding or subtracting the power supply module, the isolation module and the driving implementation module in this embodiment. As shown in fig. 1 and 2, in the present embodiment, a driving unit for an inverter is configured, the driving unit including a process control module, a plurality of isolation modules, a plurality of drive implementation modules, and a power supply module; the control processing module processes and controls the input driving signals and respectively outputs a plurality of processed and controlled driving signals to the plurality of isolation modules; the plurality of isolation modules transmit the received signals to the other isolated end of the isolation modules and transmit the signals to corresponding drive realization modules, and the drive realization modules configure the output ends corresponding to the signals into a high-resistance or low-resistance state according to the received signals; the power supply module converts input power supply voltage, provides a first power supply output end and a second power supply output end which are isolated from each other and not connected to the ground, and respectively supplies power to components arranged at two ends of the isolation module in the driving unit.
In other words, in addition to implementing all functions of the driving unit or the driving chip in the prior art, the driving unit in this embodiment further adds a power module and an isolation module, where an output of the power module includes a first power output end and a second power output end that are not connected to the ground and are isolated, where the first power output end is a component before the isolation module, and is mainly used for supplying power to a processing control module that implements functions (which may or may not include an output stage of the driving chip in the prior art) such as dead zone control, pulse generation, pulse filtering, and a flip-flop in the driving chip in the prior art; meanwhile, the second power output terminal supplies power to a component behind the isolation unit of the driving unit in this embodiment, for example, supplies power to the driving implementation module. Thus, although circuit connections outside the module may be involved, driving may be accomplished without adding additional auxiliary power supplies or additional power leads. Therefore, the driving unit in the present embodiment can be simplified in design and is suitable for most usage scenarios.
Fig. 2 shows a more specific structure diagram of the driving unit in the embodiment, and in fig. 2, the processing CONTROL module is identified as CONTROL, and the isolation module is identified as isolation.
In this embodiment, as shown in fig. 4, the power module includes a transformer T, a switching tube Q1 and a rectifying unit, the switching tube Q1 converts an input power voltage into pulses applied to a primary winding T1 of the transformer T, a plurality of windings on a secondary side of the transformer T sense the pulse signals respectively and output the pulse signals separately after passing through respective rectifying units (in fig. 4, one rectifying unit includes a diode and a capacitor), and a rectifying unit is connected to a secondary winding of one transformer T.
In fig. 4, the secondary winding of the transformer T includes a first secondary winding T2 and a second secondary winding T3, one end of each of the first secondary winding T2 and the second secondary winding T3 is connected to the anode of a respective rectifying diode, the cathode of each rectifying diode is connected to one end of a respective smoothing capacitor in the rectifying unit, the other end of each smoothing capacitor is connected to the other end of the secondary winding where the smoothing capacitor is located, and the other ends of the secondary windings (T2, T3) are set to different ground potentials. In this embodiment, the other end of the first secondary winding T2 is connected to the ground potential of the input power voltage, and the first power output terminal and the input power voltage are grounded, so that the first power output terminal can supply power to the processing control module, that is, the first power output terminal also supplies power to the processing control module. Meanwhile, in this embodiment, since the first power output terminal has a separate pin or terminal, the first power output terminal may also supply power to other components except for the driving unit or supply power to other components after conversion or processing, as long as the components are at the same ground potential as the input power voltage.
In this embodiment, the output ends of the control processing module, the isolation module and the drive implementation module correspond to one another in number. For example, as shown in fig. 1 and fig. 2, the control processing module inputs two driving signals, and the output end of the control processing module outputs two processed (e.g., dead zone control, etc.) driving signals, so that in this embodiment, each output of the control processing module is respectively transmitted to an independent isolation module, and enters an independent driving implementation module after passing through the isolation module.
As shown in fig. 3, in this embodiment, the driving implementation module includes an operational amplifier and an MOS transistor, where the operational amplifier performs waveform shaping and level conversion on the signal output by the isolation module, and then transmits the signal to a gate of the MOS transistor. The operational amplifier is directly powered by the second power supply end or is powered by the second power supply end after conversion. Therefore, power supply of the driving unit is not needed by an external auxiliary power supply, the design difficulty is reduced, and the cost is reduced. In some cases, for example, in the case of low power, the driving unit can be directly used without an external MOS transistor for switching, that is, the driving unit is actually integrated with the MOS transistor as a switching device, which is advantageous in cost saving.
In this embodiment, the isolation module includes a photocoupler, and a light emitting end of the photocoupler is powered by the first power output end or is grounded together with the first power output end; and the light receiving end of the photoelectric coupler is powered by the second power output end or is grounded together with the second power output end. Specifically, the isolation module is selectively connected in such a manner that if the optical transmission thereof requires connection of a power supply, the power supply is provided from the first power supply output terminal, and if the connection of the power supply is not required but only the grounding is required, the ground potential thereof is necessarily the ground potential of the first power supply output terminal; likewise, the same is true of the light receiving end of the isolation module, which is however connected to the second power supply output or to the ground potential of the second power supply output. Thus, signal isolation can be achieved while transmitting signals simply.
Generally speaking, in this embodiment, after the input power is connected, the driving unit outputs two paths of first power output and second power output which are not connected to the ground, and respectively supplies power to the control circuit part inside the driving unit and the isolated driving part inside each driving unit; of course, power may also be supplied to the corresponding external circuit; after entering the driving unit, the two driving signals respectively pass through the control processing circuit or module and the isolation circuit to input signals to the driving implementation module, and the driving implementation circuit enables the power MOS tube therein to be switched on or switched off, so that the output end (between the drain electrode and the source electrode of the power MOS tube) of the driving implementation module is in a change between a low resistance state and a high resistance state, and driving is achieved.
In order to further simplify the design difficulty of the converter, in this embodiment, most components (except for the transformer) in the driving unit may be integrated into one integrated circuit or chip, and when in use, the driving unit may be formed by connecting the transformer to the integrated circuit according to the pins reserved in the integrated circuit, which makes the driving implementation simpler and faster for practical use, and at the same time, the applicability is expanded to a certain extent. In other words, in the driving unit, the driving unit is integrated into an integrated circuit except the transformer, and the terminals of the primary winding and the secondary winding of the transformer form the driving unit with the integrated circuit through the setting pins reserved on the integrated circuit.
Fig. 5 shows a power connection or supply situation in a case where the power output in the power module of the driving unit is used to supply power to the isolated driving implementation module in the present embodiment.
The invention further relates to a converter, wherein the converter uses a driving unit on the primary side of a transformer to realize control over a switching network or uses a driving unit on the secondary side of the transformer to realize control over a rectifying module, and the driving unit comprises the driving unit.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A driving unit for a converter is characterized by comprising a processing control module, a plurality of isolation modules, a plurality of driving realization modules and a power supply module; the control processing module processes and controls the input initial driving signals and respectively outputs a plurality of processed and controlled driving signals to the plurality of isolation modules; the plurality of isolation modules transmit the received signals to the other isolated end of the isolation modules and transmit the signals to corresponding drive realization modules, and the drive realization modules configure the output ends corresponding to the signals into a high-resistance or low-resistance state according to the received signals; the power supply module converts input power supply voltage, provides a first power supply output end and a second power supply output end which are isolated from each other and not connected to the ground, and respectively supplies power to components arranged at two ends of the isolation module in the driving unit.
2. The driving unit for the converter according to claim 1, wherein the power module comprises a transformer, a switching tube and a rectifying unit, the switching tube converts an input power voltage into pulses applied to a primary winding of the transformer, and a plurality of windings on a secondary winding of the transformer respectively sense the pulse signals and respectively output the pulse signals after passing through the respective rectifying units.
3. The driving unit for the converter according to claim 2, wherein the secondary winding of the transformer includes a first secondary winding and a second secondary winding, one end of the first secondary winding and one end of the second secondary winding are respectively connected to anodes of respective rectifying diodes, cathodes of the rectifying diodes are respectively connected to one end of respective filter capacitors, the other end of each filter capacitor is respectively connected to the other end of the secondary winding where the filter capacitor is located, and the other ends of the secondary windings are respectively set to different ground potentials.
4. The drive unit for the converter according to claim 3, wherein the other end of the first secondary winding is connected to a ground potential of the input power supply voltage, and the first power supply output terminal and the input power supply voltage are commonly grounded; the first power output end also supplies power to the processing control module.
5. The driving unit for the converter according to claim 1, wherein the number of the output ends of the control processing module, the isolation module and the drive implementation module corresponds to one another.
6. The driving unit for the converter according to claim 1, wherein the driving implementation module includes an operational amplifier and a MOS transistor for waveform shaping and level conversion, and the operational amplifier performs waveform shaping and level conversion on the signal output by the isolation module and then transmits the signal to a gate of the MOS transistor.
7. The driving unit for the converter according to claim 6, wherein the operational amplifier is directly powered or is powered after conversion by the second power supply terminal.
8. The drive unit for the converter according to claim 1, wherein the isolation module includes an opto-coupler, a light emitting terminal of the opto-coupler being powered by the first power output terminal or being common to the first power output terminal; and the light receiving end of the photoelectric coupler is powered by the second power output end or is grounded together with the second power output end.
9. The drive unit for the converter according to claim 4, wherein the drive unit is integrated into an integrated circuit except the transformer, and the terminals of the primary winding and the secondary winding of the transformer form the drive unit together with the integrated circuit by means of setting pins reserved on the integrated circuit.
10. Converter for controlling a switching network using a drive unit on its primary side of a transformer or a rectifying module using a drive unit on its secondary side of a transformer, characterized in that the drive unit comprises a drive unit according to claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201839.0A CN110957920A (en) | 2019-11-29 | 2019-11-29 | Drive unit for a converter and converter thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201839.0A CN110957920A (en) | 2019-11-29 | 2019-11-29 | Drive unit for a converter and converter thereof |
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| CN110957920A true CN110957920A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911201839.0A Pending CN110957920A (en) | 2019-11-29 | 2019-11-29 | Drive unit for a converter and converter thereof |
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Address after: 518000 5th Floor, Building A5, Nanshan Zhiyuan, 1001 Xueyuan Avenue, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Haowen Electronics Co.,Ltd. Address before: 518000 5th Floor, Building A5, Nanshan Zhiyuan, 1001 Xueyuan Avenue, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: HAWAN ELECTRONICS Co.,Ltd. |
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Application publication date: 20200403 |