CN114236335A - Voltage stress detection circuit of switching tube of direct current conversion module and control method thereof - Google Patents
Voltage stress detection circuit of switching tube of direct current conversion module and control method thereof Download PDFInfo
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- CN114236335A CN114236335A CN202111463815.XA CN202111463815A CN114236335A CN 114236335 A CN114236335 A CN 114236335A CN 202111463815 A CN202111463815 A CN 202111463815A CN 114236335 A CN114236335 A CN 114236335A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2632—Circuits therefor for testing diodes
- G01R31/2633—Circuits therefor for testing diodes for measuring switching properties thereof
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a voltage stress detection circuit of a switching tube of a direct current conversion module and a control method thereof, wherein the direct current conversion module comprises a high-voltage side converter, a transformer, a low-voltage side converter, a buck module and a controller which are sequentially connected, the buck module comprises a switching tube Q7, a sampling unit, a presumption unit and a control unit are connected between two ends of the switching tube Q7 and a grid electrode of the switching tube Q7, the sampling unit samples a voltage value Vds at two ends when the switching tube Q7 is turned off, and sends the voltage value Vds to the presumption unit; the estimating unit sets the moment when the minimum value in the voltage value Vds is detected as the moment of the minimum stress point of the switching device; the control unit performs direct current conversion by taking the moment of the minimum stress point as the turn-off moment of the switching tube Q7; the invention can accurately find the time point of the power tube at the minimum stress, and close the power tube in the time, thereby reducing the stress deviation of the switching tube and ensuring the reliability of the system; the specification and the type selection of the switching tube are convenient, the reliability of the product is improved, and the production cost can be indirectly reduced.
Description
Technical Field
The invention relates to the field of electronic power, in particular to a voltage stress detection circuit of a switching tube of a direct current conversion module and a control method thereof.
Background
Switching-off time of switch tube in the switching power supply buck circuit under general condition sets up in the dead time T of high-pressure side switch tube, but to the power supply circuit product of volume production, inside actual dead time value and low pressure side switch tube turn-off time value have solidified to software, this value mostly reachs through carrying out actual test to the research and development model machine at the product design initial stage, nevertheless because the existence of volume production product device parameter difference, it can cause switch tube stress deviation great still to adopt this value, influence switch tube specification lectotype. For example, the voltage stress of the product test I is 85V, the voltage stress of the product test II is 95V, the parameter difference causes poor consistency, and larger margin needs to be considered for device type selection. In addition, as the device is aged and the performance parameters are changed, the stress deviation of the switching tube is large, and the reliability of the product is influenced.
Therefore, it is an urgent technical problem in the art to design an optimal turn-off time capable of automatically detecting the minimum stress point of the switch tube on the device.
Disclosure of Invention
In order to solve the above-mentioned defects in the prior art, the invention provides a voltage stress detection circuit for a switching tube of a dc conversion module and a control method thereof.
The technical scheme adopted by the invention is that a voltage stress detection circuit of a switching tube of a direct current conversion module is designed, the direct current conversion module comprises a high-voltage side converter, a transformer, a low-voltage side converter, a buck module and a controller which are connected in sequence, the controller controls the actions of the high-voltage side converter, the low-voltage side converter and the buck module, direct current electric energy is transmitted to the buck module from the high-voltage side converter, the buck module comprises a switching tube Q7, a sampling unit, an estimating unit and a control unit are connected between two ends of the switching tube Q7 and a grid electrode of the switching tube Q7, and the sampling unit is used for sampling voltage values Vds at two ends when the switching tube Q7 is turned off and sending the voltage values Vds to the estimating unit; the estimating unit sets the moment when the minimum value in the voltage value Vds is detected as the moment of the minimum stress point of the switching device; and the control unit carries out direct current conversion by taking the minimum stress point moment as the turn-off moment of the switching tube Q7.
And a peak holding circuit is connected between the switching tube Q7 and the sampling unit and is used for capturing the voltage value Vds of the switching tube Q7 at the peak value.
The sampling unit adopts a voltage sensor.
The high-side converter comprises a full-bridge conversion module, and the low-side converter comprises a push-pull conversion module.
The invention also designs a control method of the voltage stress detection circuit of the switching tube of the direct current conversion module, wherein the detection circuit comprises the voltage stress detection circuit of the switching tube of the direct current conversion module, and the control method comprises the following steps: the method comprises the steps of taking the turn-off time of a power switch in a high-voltage side converter as T0, taking T0+ M as the test turn-off time of a switch tube Q7, taking M as a variable and the value range of M between [ -T, T ], detecting voltage values Vds at two ends of the switch tube Q7 when the switch tube Q7 is turned off for multiple times, recording the minimum value of the sampled voltage values Vds, recording the time tk corresponding to the minimum value, taking T0+ tk as the minimum stress point time, and taking the minimum stress point time as the turn-off time of the switch tube Q7 to perform direct current conversion.
Setting a step length a, making the step length a =2T/N, taking T0+ (-T + a × k) as the test turn-off time, where k is a counter, and taking the value of the counter as an integer between 0 and N, gradually increasing k, and performing N +1 times of detection on the voltage value Vds.
The control method comprises the following specific steps:
step 1, driving a high-voltage side converter, a low-voltage side converter and a buck module to work;
step 2, detecting the moment of turning off the power switch in the high-voltage side converter, wherein the moment of turning off the power switch in the high-voltage side converter is T0;
step 3, taking T0+ M as the test turn-off time of the switching tube Q7, setting a step length a when the value range of M is variable between [ -T, T ], making the step length a =2T/N, and setting k to be 0;
step 4, taking T0+ (-T + a) k) as the test turn-off time, and driving the switching tube Q7 to turn off;
step 5, detecting and recording a voltage value Vds, and adding 1 to k;
step 6, judging whether k is equal to N, if so, turning to step 7, otherwise, turning to step 4;
step 7, inquiring the minimum value in the recorded voltage values Vds, recording the time tk corresponding to the minimum value, and taking T0 plus tk as the moment of the minimum stress point;
and 8, performing direct current conversion by taking the minimum stress point moment as the turn-off moment of the switching tube Q7.
The technical scheme provided by the invention has the beneficial effects that:
the invention can accurately find the time point of the power tube at the minimum stress, and close the power tube in the time, thereby reducing the stress deviation of the switching tube and ensuring the reliability of the system; the specification and the type selection of the switching tube are convenient, the reliability of the product is improved, and the production cost can be indirectly reduced.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a resonant conversion topology architecture of a vehicle-mounted charger of an electric vehicle;
FIG. 2 is a control schematic block diagram;
FIG. 3 is a timing diagram of the switching of the high side switch tube and the buck power tube;
fig. 4 is a flow chart for obtaining a minimum stress midpoint time of a switching device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention discloses a voltage stress detection circuit of a switching tube of a direct current conversion module, wherein the direct current conversion module comprises a high-voltage side converter, a transformer, a low-voltage side converter, a buck module and a controller which are connected in sequence, the controller controls the actions of the high-voltage side converter, the low-voltage side converter and the buck module, and direct current electric energy is transmitted to the buck module from the high-voltage side converter, referring to a control schematic diagram shown in fig. 2, the buck module comprises a switching tube Q7, a sampling unit, an estimating unit and a control unit are connected between two ends of the switching tube Q7 and a grid electrode of the switching tube Q7, wherein the sampling unit is used for sampling a voltage value Vds at two ends when the switching tube Q7 is turned off (in a preferred embodiment, the sampling unit obtains the voltage value when a switching device is turned off by a scanning gun method), and sends the voltage value Vds to the estimating unit; the estimating unit sets the moment when the minimum value in the voltage value Vds is detected as the moment of the minimum stress point of the switching device; and the control unit carries out direct current conversion by taking the minimum stress point moment as the turn-off moment of the switching tube Q7. The control unit is connected with the grid of the switching tube Q7, sends out a PWM signal, and adjusts the PWM signal to control the output current.
Fig. 1 shows an application of the present invention in a vehicle-mounted charger for an electric vehicle, in which a primary circuit is connected to a PFC module, an in-vehicle high voltage battery is connected to a high voltage side converter, an in-vehicle low voltage load is connected to a buck module, and the in-vehicle high voltage battery can supply power to the in-vehicle low voltage load through a dc conversion module.
Referring to the preferred embodiment shown in fig. 2, a peak hold circuit is connected between the switching tube Q7 and the sampling unit, and the peak hold circuit is used for capturing the voltage value Vds of the switching tube Q7 at the peak value.
In a preferred embodiment, the sampling unit employs a voltage sensor.
Referring to the preferred embodiment shown in fig. 1, the high side converter includes a full bridge conversion module including four power switches Q1, Q2, Q3, Q4. The low-voltage side converter comprises a push-pull conversion module, and the push-pull conversion module comprises two power switches Q5 and Q6. Referring to the switching timing diagrams of the high-side switch tube and the buck power tube shown in fig. 3, Q1 and Q4 in the high-side converter act synchronously, Q2 and Q3 act synchronously, and Q1 and Q2 act reversely. Only Q1 needs to be detected in detecting the off-time of the high side converter power switch. The turn-off timing of the switching tube Q7 is around the turn-off timing of Q1.
The invention also discloses a control method of the voltage stress detection circuit of the switching tube of the direct current conversion module, the detection circuit comprises the voltage stress detection circuit of the switching tube of the direct current conversion module, and the control method comprises the following steps: the method comprises the steps of taking the turn-off time of a power switch in a high-voltage side converter as T0, taking T0+ M as the test turn-off time of a switch tube Q7, taking M as a variable and the value range of M between [ -T, T ], detecting voltage values Vds at two ends of the switch tube Q7 when the switch tube Q7 is turned off for multiple times, recording the minimum value of the sampled voltage values Vds, recording the time tk corresponding to the minimum value, taking T0+ tk as the minimum stress point time, and taking the minimum stress point time as the turn-off time of the switch tube Q7 to perform direct current conversion.
In a preferred embodiment, dividing [ -T, T ] into N equal parts, setting step a, making step a =2T/N, taking T0+ (-T + a × k) as the test turn-off time, where k is a counter, which takes an integer value between 0 and N, and gradually increasing k, and performing N +1 times of detection on the voltage value Vds (where N is a positive integer).
In the range of-t, … 0 …, t, the voltage Vds at two ends of the switching device is detected by the sampling unit once every step until the step is finished; specifically, -T is to turn off the switching tube Q7T seconds in advance on the basis of T0, and detect the voltage value corresponding to the two ends of the switching tube Q7 when it is turned off; t is the time delay turn-off switch tube Q7, and detects the voltage value corresponding to the two ends when the switch tube Q7 is turned off. When the switching tube Q7 is at-t, … 0 …, the voltage values corresponding to the two ends when the switching tube Q7 is switched off are detected by t, and V0, V1, V2, V3 and … … Vn are obtained; because a peak holding circuit is connected in series, the collected voltages are all peak voltage values. Taking the minimum value of each voltage, min { V0, V1, V2, V3, … … Vn }, wherein the obtained voltage value is the minimum turn-off voltage stress value, and the time corresponding to the minimum turn-off voltage stress value is tk。tkCan be positive or negative if tkIf the voltage is positive, the switching tube Q7 of the buck circuit is turned off in a delayed manner compared with the turn-off time of the high-voltage side switching tube; if tkThe negative value is to turn off the switch Q7 of the buck circuit earlier than the turn-off time of the high-side switch.
Referring to a flowchart for acquiring the minimum stress point moment of the switching device shown in fig. 4, the control method includes the following specific steps:
step 1, driving a high-voltage side converter, a low-voltage side converter and a buck module to work;
step 2, detecting the moment of turning off the power switch in the high-voltage side converter, wherein the moment of turning off the power switch in the high-voltage side converter is T0;
step 3, taking T0+ M as the test turn-off time of the switching tube Q7, setting a step length a when the value range of M is variable between [ -T, T ], making the step length a =2T/N, and setting k to be 0;
step 4, taking T0+ (-T + a) k) as the test turn-off time, and driving the switching tube Q7 to turn off;
step 5, detecting and recording a voltage value Vds at two ends of a switching tube Q7, and adding 1 to k;
step 6, judging whether k is equal to N, if so, turning to step 7, otherwise, turning to step 4;
step 7, inquiring the minimum value in the recorded voltage values Vds, recording the time tk corresponding to the minimum value, and taking T0 plus tk as the moment of the minimum stress point;
and 8, performing direct current conversion by taking the minimum stress point moment as the turn-off moment of the switching tube Q7.
And then the switching tube Q7 is switched off at the minimum stress point, so that the stress deviation of the switching tube is reduced, and the switching loss is reduced.
The foregoing examples are illustrative only and are not intended to be limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present application should be included in the claims of the present application.
Claims (7)
1. The utility model provides a direct current conversion module switch tube voltage stress detection circuitry, direct current conversion module is including high pressure side converter, transformer, low pressure side converter, buck module and the controller that connects gradually, the action of controller control high pressure side converter, low pressure side converter, buck module is defeated direct current electric energy by high pressure side converter to the buck module, including switch tube Q7 in the buck module, a serial communication port, be connected sampling unit, presumption unit and the control unit between switch tube Q7 both ends and its grid, wherein
The sampling unit is used for sampling the voltage value Vds of the two ends when the switching tube Q7 is turned off and sending the voltage value Vds to the estimating unit;
the estimating unit sets the moment when the minimum value in the voltage value Vds is detected as the moment of the minimum stress point of the switching device;
and the control unit carries out direct current conversion by taking the minimum stress point moment as the turn-off moment of the switching tube Q7.
2. The voltage stress detection circuit of the switching tube of the DC conversion module as claimed in claim 1, wherein a peak hold circuit is connected between the switching tube Q7 and the sampling unit, and the peak hold circuit is used for capturing the voltage value Vds of the switching tube Q7 at the peak value.
3. The dc conversion module switching tube voltage stress detection circuit of claim 2, wherein the sampling unit employs a voltage sensor.
4. The dc conversion module switching tube voltage stress detection circuit of claim 1, wherein the high-side converter comprises a full-bridge conversion module and the low-side converter comprises a push-pull conversion module.
5. A control method of a voltage stress detection circuit of a switching tube of a DC conversion module, wherein the detection circuit comprises the voltage stress detection circuit of the switching tube of the DC conversion module according to any one of claims 1 to 4, and the control method comprises the following steps: the method comprises the steps of taking the turn-off time of a power switch in a high-voltage side converter as T0, taking T0+ M as the test turn-off time of a switch tube Q7, taking M as a variable and the value range of M between [ -T, T ], detecting voltage values Vds at two ends of the switch tube Q7 when the switch tube Q7 is turned off for multiple times, recording the minimum value of the sampled voltage values Vds, recording the time tk corresponding to the minimum value, taking T0+ tk as the minimum stress point time, and taking the minimum stress point time as the turn-off time of the switch tube Q7 to perform direct current conversion.
6. The method according to claim 5, wherein the step length a is set to be a =2T/N, T0+ (-T + a × k) is taken as the test turn-off time, k is a counter and is an integer between 0 and N, and k is increased step by step to perform N +1 times of detection of the voltage value Vds.
7. The method for controlling the voltage stress detection circuit of the switching tube of the DC conversion module according to claim 6, wherein the method comprises the following steps:
step 1, driving a high-voltage side converter, a low-voltage side converter and a buck module to work;
step 2, detecting the moment of turning off the power switch in the high-voltage side converter, wherein the moment of turning off the power switch in the high-voltage side converter is T0;
step 3, taking T0+ M as the test turn-off time of the switching tube Q7, setting a step length a when the value range of M is variable between [ -T, T ], making the step length a =2T/N, and setting k to be 0;
step 4, taking T0+ (-T + a) k) as the test turn-off time, and driving the switching tube Q7 to turn off;
step 5, detecting and recording a voltage value Vds, and adding 1 to k;
step 6, judging whether k is equal to N, if so, turning to step 7, otherwise, turning to step 4;
step 7, inquiring the minimum value in the recorded voltage values Vds, recording the time tk corresponding to the minimum value, and taking T0 plus tk as the moment of the minimum stress point;
and 8, performing direct current conversion by taking the minimum stress point moment as the turn-off moment of the switching tube Q7.
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| CN202111463815.XA CN114236335B (en) | 2021-12-02 | 2021-12-02 | DC conversion module switching tube voltage stress detection circuit and control method thereof |
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| CN202111463815.XA CN114236335B (en) | 2021-12-02 | 2021-12-02 | DC conversion module switching tube voltage stress detection circuit and control method thereof |
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| CN114236335B CN114236335B (en) | 2023-07-18 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7778046B1 (en) * | 2008-12-17 | 2010-08-17 | Slobodan Cuk | Voltage step-up switching DC-to-DC converter field of the invention |
| CN102857091A (en) * | 2012-04-18 | 2013-01-02 | 哈尔滨工程大学 | Soft switching circuit |
| CN104167948A (en) * | 2014-09-11 | 2014-11-26 | 上海理工大学 | Variable-frequency soft switching control method of micro photovoltaic grid-connected inverter |
| CN104578802A (en) * | 2015-01-20 | 2015-04-29 | 北京理工大学 | Optimal current waveform controlling method for current type two-way DC-DC convertor |
| CN110350793A (en) * | 2019-06-11 | 2019-10-18 | 华中科技大学 | A kind of pair of active bridge DC-DC converter and its current stress optimization method |
| CN111463889A (en) * | 2020-04-09 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Double-direct-current power supply switching system with self-locking function |
| CN112054695A (en) * | 2020-09-16 | 2020-12-08 | 广东电网有限责任公司电力科学研究院 | Isolated DC converter control method, device, equipment and storage medium |
| CN113394996A (en) * | 2021-06-07 | 2021-09-14 | 深圳威迈斯新能源股份有限公司 | AC-DC resonant conversion circuit and control method thereof |
-
2021
- 2021-12-02 CN CN202111463815.XA patent/CN114236335B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7778046B1 (en) * | 2008-12-17 | 2010-08-17 | Slobodan Cuk | Voltage step-up switching DC-to-DC converter field of the invention |
| CN102857091A (en) * | 2012-04-18 | 2013-01-02 | 哈尔滨工程大学 | Soft switching circuit |
| CN104167948A (en) * | 2014-09-11 | 2014-11-26 | 上海理工大学 | Variable-frequency soft switching control method of micro photovoltaic grid-connected inverter |
| CN104578802A (en) * | 2015-01-20 | 2015-04-29 | 北京理工大学 | Optimal current waveform controlling method for current type two-way DC-DC convertor |
| CN110350793A (en) * | 2019-06-11 | 2019-10-18 | 华中科技大学 | A kind of pair of active bridge DC-DC converter and its current stress optimization method |
| CN111463889A (en) * | 2020-04-09 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Double-direct-current power supply switching system with self-locking function |
| CN112054695A (en) * | 2020-09-16 | 2020-12-08 | 广东电网有限责任公司电力科学研究院 | Isolated DC converter control method, device, equipment and storage medium |
| CN113394996A (en) * | 2021-06-07 | 2021-09-14 | 深圳威迈斯新能源股份有限公司 | AC-DC resonant conversion circuit and control method thereof |
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