CN110209236A - A kind of conversion circuit and its conversion method of twin voltage automatic switchover - Google Patents
A kind of conversion circuit and its conversion method of twin voltage automatic switchover Download PDFInfo
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- CN110209236A CN110209236A CN201910424390.8A CN201910424390A CN110209236A CN 110209236 A CN110209236 A CN 110209236A CN 201910424390 A CN201910424390 A CN 201910424390A CN 110209236 A CN110209236 A CN 110209236A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
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Abstract
The present invention relates to power electronics fields, and in particular to a kind of conversion circuit that twin voltage automatically switches, including identification module, PWM control module and half-bridge and full-bridge conversion module；The half-bridge and full-bridge conversion module include the first bridge arm and the second bridge arm；First bridge arm includes the first drive module, first switch tube and second switch；Second bridge arm includes the second drive module, third switching tube and the 4th switching tube；It further include load blocks, the load blocks are connected between the public connecting end and third switching tube and the public connecting end of the 4th switching tube of first switch tube and second switch.The present invention passes through setting identification module, PWM control module, half-bridge and full-bridge conversion module and load blocks, it can be according to the size of input voltage, to which half-bridge and full-bridge conversion module are converted in half-bridge state and full-bridge state automatically, to be compatible with 220V and 110V voltage simultaneously.
Description
Technical field
The present invention relates to power electronics fields, and in particular to the conversion circuit and its turn that a kind of twin voltage automatically switches
Change method.
Background technique
Currently, the voltage of whole world different regions is different, based on mainly 110V and 220V, 230V.And it is most of
Product cannot switch between 110V and 220V voltage.This brings many inconvenience to manufacturer and user.It is opened in terms of power supply
Powered-down source has been carried out the use of 80V-260V Width funtion, but many product loads such as ultrasonic wave driving is directly with 110V or 220V
Power supply, is not available Switching Power Supply.Therefore, it is necessary to one kind can be directly realized by the circuit of 110V and 220V load transfer to meet use
Being equipped with for family requires.
Summary of the invention
The purpose of the present invention is being directed to above-mentioned deficiency in the prior art, a kind of conversion that twin voltage automatically switches is provided
Circuit and its conversion method can be compatible with the input voltage of 110V and the input voltage of 220V simultaneously, realize different power grid electricity
Press the versatility that uses, allow product can under different input voltage situations normal use, improve its convenience.
The purpose of the present invention is achieved through the following technical solutions: a kind of conversion circuit that twin voltage automatically switches, including is known
Other module, PWM control module and half-bridge and full-bridge conversion module；
The identification module for identification power grid input voltage and according to power grid input voltage drive PWM control module work
Make；
The half-bridge and full-bridge conversion module include the first bridge arm and the second bridge arm；First bridge arm includes the first driving
Module, first switch tube and second switch；Second bridge arm includes the second drive module, third switching tube and the 4th
Switching tube；
The PWM control module is used to be sent to the first drive module and the second drive module respectively according to identification module
Pulse signal；
First drive module drives first switch tube and second switch to work according to pulse signal；Described second
Drive module drives third switching tube and the 4th switching tube to work according to pulse signal；
The conversion circuit that the twin voltage automatically switches further includes load blocks, and the load blocks are connected to first switch
Between pipe and the public connecting end and third switching tube and the public connecting end of the 4th switching tube of second switch.
The present invention is further arranged to, the first switch tube, second switch, third switching tube and the 4th switching tube
Respectively metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q2A；The grid of the metal-oxide-semiconductor Q1 and the grid of metal-oxide-semiconductor Q1A
Extremely it is connect with the output end of the first drive module；The grid of the metal-oxide-semiconductor Q2 and the grid of metal-oxide-semiconductor Q2A drive with second
The output end of dynamic model block connects；The source electrode of the metal-oxide-semiconductor Q1 is connect with the drain electrode of metal-oxide-semiconductor Q1A；The source electrode of the metal-oxide-semiconductor Q2 with
The drain electrode of MOS pipe Q2A connects；The load blocks are between the source electrode of metal-oxide-semiconductor Q1 and the source electrode of metal-oxide-semiconductor Q2；The MOS
The drain electrode of pipe Q1 is connect with power grid with the drain electrode of metal-oxide-semiconductor Q2；The source electrode of the metal-oxide-semiconductor Q1A connects with the source electrode of metal-oxide-semiconductor Q2A
Ground.
The present invention is further arranged to, and the load blocks include transformer T1 and capacitor C14；The transformer T1's
One end is connect with the source electrode of metal-oxide-semiconductor Q1；The other end of the transformer T1 is connect by capacitor C14 with the source electrode of metal-oxide-semiconductor Q2.
The present invention is further arranged to, and the metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2 and MOS pipe Q2A are equipped with and post
Raw diode.
The present invention is further arranged to, and the identification module and PWM control module are integrated into singlechip chip U3；Power grid
It is connect by resistance R2 with the input terminal of singlechip chip U3；The output end of the singlechip chip U3 drives with first respectively
Module, the connection of the second drive module.
The present invention is further arranged to, and first drive module includes metal-oxide-semiconductor driving chip U2；The second driving mould
Block includes metal-oxide-semiconductor driving chip U4；The input terminal of the metal-oxide-semiconductor driving chip U2 and the input terminal of metal-oxide-semiconductor driving chip U4
It is connect with PWM control module；The output end of the metal-oxide-semiconductor driving chip U2 is connect with metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A respectively；Institute
The output end for stating metal-oxide-semiconductor driving chip U4 is connect with metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q2A respectively.
7, the conversion method for the conversion circuit that a kind of twin voltage automatically switches, comprising the following steps:
A, identification module identifies power grid input voltage and controls PWM control module；
B, PWM control module sends pwm signal according to identification module to the first drive module and the second driving mould respectively
Block；
C, the first drive module controls first switch tube and second switch according to pwm signal respectively；Second driving mould
Root tuber controls third switching tube and the 4th switching tube according to pwm signal respectively；
If D, power grid input voltage is that 220V, half-bridge and full-bridge conversion module and load blocks form half-bridge circuit；
If E, power grid input voltage is 110V, half-bridge and full-bridge conversion module are born and carry module composition full-bridge circuit.
The present invention is further arranged to, further comprising the steps of in the step D:
D1, the second drive module output high level control to the 4th switching tube and the 4th switching tube are connected；Second driving
Third switching tube is connected in module output low level control to third switching tube；
D2, the first drive module are respectively to first switch tube and the pwm signal of second switch output 180 degree complementation.
The present invention is further arranged to, further comprising the steps of in the step E:
E1, the first drive module and the second drive module are same to first switch tube and the 4th switching tube output phase respectively
Pwm signal；First drive module and the second drive module are same to second switch and third switching tube output phase respectively
Pwm signal；
E2, the first drive module are respectively to first switch tube and the pwm signal of second switch output 180 degree complementation；
Second drive module is respectively to third switching tube and the pwm signal of the 4th switching tube output 180 degree complementation.
Beneficial effects of the present invention: the present invention passes through setting identification module, PWM control module, half-bridge and full-bridge modulus of conversion
Block and load blocks, can according to the size of input voltage, thus half-bridge and full-bridge conversion module automatically half-bridge state with
And the conversion of full-bridge state, to be compatible with 220V and 110V voltage simultaneously, and compared to traditional voltage conversion circuit, originally
The structure of invention is simple.
Detailed description of the invention
Invention is described further using attached drawing, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to the following drawings
Its attached drawing.
Fig. 1 is the circuit diagram of half-bridge and full-bridge conversion module of the present invention and load blocks cooperation；
Fig. 2 is the circuit diagram of identification module and PWM control module cooperation of the present invention；
Wherein: the first bridge arm of 1-；The second bridge arm of 2-；3- load blocks.
Specific embodiment
The invention will be further described with the following Examples.
From Fig. 1 to Fig. 2；A kind of conversion circuit that twin voltage automatically switches described in the present embodiment, including identification mould
Block, PWM control module and half-bridge and full-bridge conversion module；
The identification module for identification power grid input voltage and according to power grid input voltage drive PWM control module work
Make；
The half-bridge and full-bridge conversion module include the first bridge arm 1 and the second bridge arm 2；First bridge arm 1 includes first
Drive module, first switch tube and second switch；Second bridge arm 2 include the second drive module, third switching tube with
And the 4th switching tube；
The PWM control module is used to be sent to the first drive module and the second drive module respectively according to identification module
Pulse signal；
First drive module drives first switch tube and second switch to work according to pulse signal；Described second
Drive module drives third switching tube and the 4th switching tube to work according to pulse signal；
The conversion circuit that the twin voltage automatically switches further includes load blocks 3, and the load blocks 3 are connected to first and open
Between the public connecting end and third switching tube and the public connecting end of the 4th switching tube of Guan Guanyu second switch.
Specifically, the conversion circuit that twin voltage described in the present embodiment automatically switches, the course of work are to identify mould first
The size for the input voltage that block identification is come in from power grid, then identification module informs the input that PWM control module is come in from power grid
Voltage is 110V or is 220V, and when the voltage of power grid input is 220V, PWM control module is to the second drive module
Signal is sent, so that the second drive module output high level controls to the 4th switching tube and the 4th switching tube is connected, while the
Third switching tube is connected in two drive modules output low level control to third switching tube；And at the same time PWM control module to
First drive module sends signal, so that the first drive module exports 180 degree to first switch tube and second switch respectively
Complementary pwm signal forms half-bridge electricity at this time between first switch tube, second switch, load blocks 3 and the 4th switching tube
Road, thus powering load；When the voltage of power grid input is 110V, PWM control module to the first drive module and
Second drive module sends signal, so that the first drive module and the second drive module are respectively to first switch tube and the 4th
Switching tube exports identical pwm signal, at the same the first drive module and the second drive module respectively to second switch and
Third switching tube exports identical pwm signal, and the first drive module is exported to first switch tube and second switch respectively
180 degree of complementary pwm signals, while the second drive module is mutual to third switching tube and the 4th switching tube output 180 degree respectively
The pwm signal of benefit, at this time first switch tube, second switch, third switching tube, the 4th switching tube and the formation of load blocks 3
Full-bridge circuit, thus powering load.The present embodiment passes through setting identification module, PWM control module, half-bridge and full-bridge modulus of conversion
Block and load blocks 3, can be according to the size of input voltage, so that half-bridge and full-bridge conversion module are realized automatically in 220V/
It is worked in the case of 50HZ in half-bridge state and is worked in 110V/60HZ in full-bridge state, to be compatible with 220V simultaneously
And 110V voltage；And compared to traditional voltage conversion circuit, the structure of the present embodiment is simple.
The conversion circuit that a kind of twin voltage described in the present embodiment automatically switches, the first switch tube, second switch,
Third switching tube and the 4th switching tube are respectively metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q2A；The metal-oxide-semiconductor
The grid of Q1 and the grid of metal-oxide-semiconductor Q1A are connect with the output end of the first drive module；The grid of the metal-oxide-semiconductor Q2 and
The grid of metal-oxide-semiconductor Q2A is connect with the output end of the second drive module；The drain electrode of the source electrode and metal-oxide-semiconductor Q1A of the metal-oxide-semiconductor Q1
Connection；The source electrode of the metal-oxide-semiconductor Q2 is connect with the drain electrode of metal-oxide-semiconductor Q2A；The load blocks 3 set on metal-oxide-semiconductor Q1 source electrode with
Between the source electrode of metal-oxide-semiconductor Q2；The drain electrode of the metal-oxide-semiconductor Q1 is connect with power grid with the drain electrode of metal-oxide-semiconductor Q2；The metal-oxide-semiconductor Q1A's
The source grounding of source electrode and metal-oxide-semiconductor Q2A.A kind of conversion circuit that twin voltage automatically switches, described negative described in the present embodiment
Carrying module 3 includes transformer T1 and capacitor C14；One end of the transformer T1 is connect with the source electrode of metal-oxide-semiconductor Q1；The transformation
The other end of device T1 is connect by capacitor C14 with the source electrode of metal-oxide-semiconductor Q2.What a kind of twin voltage described in the present embodiment automatically switched
Conversion circuit, first drive module include metal-oxide-semiconductor driving chip U2；Second drive module includes metal-oxide-semiconductor driving core
Piece U4；The input terminal of the metal-oxide-semiconductor driving chip U2 and the input terminal of metal-oxide-semiconductor driving chip U4 connect with PWM control module
It connects；The output end of the metal-oxide-semiconductor driving chip U2 is connect with metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A respectively；The metal-oxide-semiconductor driving chip U4
Output end connect respectively with metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q2A；Wherein metal-oxide-semiconductor driving chip U2 and metal-oxide-semiconductor driving chip U4
It can be model IR2106 or EG3112.
Specifically, the conversion circuit that twin voltage described in the present embodiment automatically switches, the course of work are to identify mould first
The size for the input voltage that block identification is come in from power grid, then identification module informs the input that PWM control module is come in from power grid
Voltage is 110V or is 220V, and when the voltage of power grid input is 220V, PWM control module is to metal-oxide-semiconductor driving chip
U4 sends signal, so that metal-oxide-semiconductor driving chip U4 output high level controls to metal-oxide-semiconductor Q2A and metal-oxide-semiconductor Q2A is connected, simultaneously
Metal-oxide-semiconductor driving chip U4 export low level control to metal-oxide-semiconductor Q2 make metal-oxide-semiconductor Q2 be connected；And at the same time PWM control module to
Metal-oxide-semiconductor driving chip U2 sends signal, so that metal-oxide-semiconductor driving chip U2 exports 180 degree to metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q1A respectively
Complementary pwm signal forms half-bridge electricity at this time between metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, transformer T1, capacitor C14 and metal-oxide-semiconductor Q2A
Road, thus powering load；When power grid input voltage be 110V when, PWM control module to metal-oxide-semiconductor driving chip U2 with
And metal-oxide-semiconductor driving chip U4 sends signal, so that metal-oxide-semiconductor driving chip U2 and metal-oxide-semiconductor driving chip U4 are respectively to metal-oxide-semiconductor Q1
And metal-oxide-semiconductor Q2A exports identical pwm signal, while metal-oxide-semiconductor driving chip U2 and metal-oxide-semiconductor driving chip U4 respectively to
Metal-oxide-semiconductor Q1A and metal-oxide-semiconductor Q2 exports identical pwm signal, and metal-oxide-semiconductor driving chip U2 is respectively to metal-oxide-semiconductor Q1 and metal-oxide-semiconductor
Q1A exports the pwm signal of 180 degree complementation, while metal-oxide-semiconductor driving chip U4 is exported to metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q2A respectively
The pwm signal of 180 degree complementation, at this time metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2A and transformer T1, capacitor C14
Full-bridge circuit is formed, thus powering load.
A kind of conversion circuit that twin voltage automatically switches, described metal-oxide-semiconductor Q1, MOS pipe Q1A, MOS described in the present embodiment
Pipe Q2 and metal-oxide-semiconductor Q2A are equipped with parasitic diode.It can be to metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, MOS by setting parasitic diode
Pipe Q2 and metal-oxide-semiconductor Q2A are protected.
A kind of conversion circuit that twin voltage automatically switches, the identification module and PWM described in the present embodiment control mould
Block is integrated into singlechip chip U3；Power grid is connect by resistance R2 with the input terminal of singlechip chip U3；The singlechip chip
The output end of U3 is connect with the first drive module, the second drive module respectively.In order to enable circuit is simpler clean and tidy, this implementation
Example is by being integrated into singlechip chip U3 for identification module and PWM control module, and wherein singlechip chip U3 can be type
Number N76E003, singlechip chip U3 are integrated with voltage identification and pwm pulse output function.
A kind of conversion method for the conversion circuit that twin voltage automatically switches described in the present embodiment, comprising the following steps:
A, identification module identifies power grid input voltage and controls PWM control module；
B, PWM control module sends pwm signal according to identification module to the first drive module and the second driving mould respectively
Block；
C, the first drive module controls first switch tube and second switch according to pwm signal respectively；Second driving mould
Root tuber controls third switching tube and the 4th switching tube according to pwm signal respectively；
If D, power grid input voltage is that 220V, half-bridge and full-bridge conversion module and load blocks 3 form half-bridge circuit；
If E, power grid input voltage is 110V, half-bridge and full-bridge conversion module are born and carry module composition full-bridge circuit.
The conversion method for the conversion circuit that a kind of twin voltage described in the present embodiment automatically switches, in the step D, also
The following steps are included:
D1, the second drive module output high level control to the 4th switching tube and the 4th switching tube are connected；Second driving
Third switching tube is connected in module output low level control to third switching tube；
D2, the first drive module are respectively to first switch tube and the pwm signal of second switch output 180 degree complementation.
The conversion method for the conversion circuit that a kind of twin voltage described in the present embodiment automatically switches, in the step E, also
The following steps are included:
E1, the first drive module and the second drive module are same to first switch tube and the 4th switching tube output phase respectively
Pwm signal；First drive module and the second drive module are same to second switch and third switching tube output phase respectively
Pwm signal；
E2, the first drive module are respectively to first switch tube and the pwm signal of second switch output 180 degree complementation；
Second drive module is respectively to third switching tube and the pwm signal of the 4th switching tube output 180 degree complementation.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (9)
1. the conversion circuit that a kind of twin voltage automatically switches, it is characterised in that: including identification module, PWM control module and half
Bridge and full-bridge conversion module；
The identification module for identification power grid input voltage and according to power grid input voltage drive PWM control module work；
The half-bridge and full-bridge conversion module include the first bridge arm (1) and the second bridge arm (2)；First bridge arm (1) includes the
One drive module, first switch tube and second switch；Second bridge arm (2) includes the second drive module, third switch
Pipe and the 4th switching tube；
The PWM control module is used to send pulse to the first drive module and the second drive module respectively according to identification module
Signal；
First drive module drives first switch tube and second switch to work according to pulse signal；Second driving
Module drives third switching tube and the 4th switching tube to work according to pulse signal；
The conversion circuit that the twin voltage automatically switches further includes load blocks (3), and the load blocks (3) are connected to first and open
Between the public connecting end and third switching tube and the public connecting end of the 4th switching tube of Guan Guanyu second switch.
2. the conversion circuit that a kind of twin voltage according to claim 1 automatically switches, it is characterised in that: the first switch
Pipe, second switch, third switching tube and the 4th switching tube are respectively metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor
Q2A；The grid of the metal-oxide-semiconductor Q1 and the grid of metal-oxide-semiconductor Q1A are connect with the output end of the first drive module；The metal-oxide-semiconductor
The grid of Q2 and the grid of metal-oxide-semiconductor Q2A are connect with the output end of the second drive module；The source electrode and MOS of the metal-oxide-semiconductor Q1
The drain electrode of pipe Q1A connects；The source electrode of the metal-oxide-semiconductor Q2 is connect with the drain electrode of metal-oxide-semiconductor Q2A；The load blocks (3) are set to MOS
Between the source electrode of pipe Q1 and the source electrode of metal-oxide-semiconductor Q2；The drain electrode of the metal-oxide-semiconductor Q1 is connect with power grid with the drain electrode of metal-oxide-semiconductor Q2；Institute
State the source electrode of metal-oxide-semiconductor Q1A and the source grounding of metal-oxide-semiconductor Q2A.
3. the conversion circuit that a kind of twin voltage according to claim 2 automatically switches, it is characterised in that: the load blocks
It (3) include transformer T1 and capacitor C14；One end of the transformer T1 is connect with the source electrode of metal-oxide-semiconductor Q1；The transformer T1
The other end connect with the source electrode of metal-oxide-semiconductor Q2 by capacitor C14.
4. the conversion circuit that a kind of twin voltage according to claim 2 automatically switches, it is characterised in that: the metal-oxide-semiconductor Q1,
Metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q2A are equipped with parasitic diode.
5. the conversion circuit that a kind of twin voltage according to claim 1 automatically switches, it is characterised in that: the identification module
And PWM control module is integrated into singlechip chip U3；Power grid is connect by resistance R2 with the input terminal of singlechip chip U3；Institute
The output end for stating singlechip chip U3 is connect with the first drive module, the second drive module respectively.
6. the conversion circuit that a kind of twin voltage according to claim 2 automatically switches, it is characterised in that: first driving
Module includes metal-oxide-semiconductor driving chip U2；Second drive module includes metal-oxide-semiconductor driving chip U4；The metal-oxide-semiconductor driving chip
The input terminal of U2 and the input terminal of metal-oxide-semiconductor driving chip U4 are connect with PWM control module；The metal-oxide-semiconductor driving chip U2
Output end connect respectively with metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1A；The output end of the metal-oxide-semiconductor driving chip U4 respectively with metal-oxide-semiconductor Q2 with
And metal-oxide-semiconductor Q2A connection.
7. a kind of conversion method of the conversion circuit automatically switched based on twin voltage described in claim 1, it is characterised in that: packet
Include following steps:
A, identification module identifies power grid input voltage and controls PWM control module；
B, PWM control module sends pwm signal according to identification module to the first drive module and the second drive module respectively；
C, the first drive module controls first switch tube and second switch according to pwm signal respectively；Second drive module root
Control third switching tube and the 4th switching tube respectively according to pwm signal；
If D, power grid input voltage is that 220V, half-bridge and full-bridge conversion module and load blocks (3) form half-bridge circuit；
If E, power grid input voltage is 110V, half-bridge and full-bridge conversion module are born and carry module composition full-bridge circuit.
8. a kind of conversion method according to claim 7, it is characterised in that: further comprising the steps of in the step D:
D1, the second drive module output high level control to the 4th switching tube and the 4th switching tube are connected；Second drive module
Third switching tube is connected in output low level control to third switching tube；
D2, the first drive module are respectively to first switch tube and the pwm signal of second switch output 180 degree complementation.
9. a kind of conversion method according to claim 7, it is characterised in that: further comprising the steps of in the step E:
E1, the first drive module and the second drive module are identical to first switch tube and the output of the 4th switching tube respectively
Pwm signal；First drive module and the second drive module are identical to second switch and the output of third switching tube respectively
Pwm signal；
E2, the first drive module are respectively to first switch tube and the pwm signal of second switch output 180 degree complementation；Second
Drive module is respectively to third switching tube and the pwm signal of the 4th switching tube output 180 degree complementation.
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| CN111103486A (en) * | 2019-12-23 | 2020-05-05 | 国家电网有限公司 | Flexible direct current converter valve submodule type identification method and valve base controller |
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| US4967332A (en) * | 1990-02-26 | 1990-10-30 | General Electric Company | HVIC primary side power supply controller including full-bridge/half-bridge driver |
| US20180138815A1 (en) * | 2016-11-15 | 2018-05-17 | Omron Automotive Electronics Co., Ltd. | Voltage converting device |
| CN208386216U (en) * | 2018-07-27 | 2019-01-15 | 柏壹科技（深圳）有限公司 | A kind of wireless charger |
| CN209911793U (en) * | 2019-05-21 | 2020-01-07 | 东莞市洁康超声波设备有限公司 | Double-voltage automatic switching conversion circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103486A (en) * | 2019-12-23 | 2020-05-05 | 国家电网有限公司 | Flexible direct current converter valve submodule type identification method and valve base controller |
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