CN208028768U - A kind of wireless driving power - Google Patents
A kind of wireless driving power Download PDFInfo
- Publication number
- CN208028768U CN208028768U CN201820313547.0U CN201820313547U CN208028768U CN 208028768 U CN208028768 U CN 208028768U CN 201820313547 U CN201820313547 U CN 201820313547U CN 208028768 U CN208028768 U CN 208028768U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power
- bridge
- power supply
- side circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 230000008878 coupling Effects 0.000 claims description 29
- 238000010168 coupling process Methods 0.000 claims description 29
- 238000005859 coupling reaction Methods 0.000 claims description 29
- 238000005070 sampling Methods 0.000 claims description 24
- 230000005674 electromagnetic induction Effects 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000031361 Hiccup Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a kind of wireless driving power, including loop of power circuit and control loop；Loop of power circuit includes power input side and output lateral circuit；Power input lateral circuit is connected with the input terminal of external voltage source, pulse signal source and power output lateral circuit；The output end of power output lateral circuit is connected with an external charging equipment；Control loop includes sample circuit and signal control circuit；The input terminal of sample circuit is connected with the output end of power output lateral circuit；Signal control circuit is connected with the output end of sample circuit and pulse signal source.Implement the utility model, control loop and loop of power circuit can be distinguished, to reduce complexity in circuits, output voltage or current waveform is also avoided to have the ingredient of control signal.
Description
Technical Field
The utility model relates to a power technical field especially relates to a wireless drive power supply.
Background
The wireless driving power supply is widely applied to occasions such as a wireless charger. The electric energy of the wireless driving power supply is transmitted from the input side to the output side through the two coupling coils, and the output control of voltage or current is realized by multiplexing the two coupling coils.
However, in the conventional wireless driving power supply, in the process of forming uninterrupted operation, the control loop at the input/output side is a closed loop without any electrical contact, but since the control signal at the input/output side is superposed on the power loop formed by the two coupling coils, the control signal needs to be extracted by the signal extraction circuit.
The inventors have found that the above-described wireless drive power supply in which the control loop and the power loop portion are superimposed not only makes the entire circuit complicated, but also makes the output voltage or current waveform contain components of the control signal.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem that will solve provides a wireless drive power supply, can not only distinguish control circuit and power return circuit for reduce circuit complexity, can also avoid output voltage or electric current waveform to have control signal's composition.
In order to solve the above technical problem, an embodiment of the present invention provides a wireless driving power supply, including a power loop and a control loop; wherein,
the power loop comprises a power input side circuit and a power output side circuit; the first input end of the power input side circuit is connected with an external voltage source, the second input end of the power input side circuit is connected with a pulse signal source with variable signal frequency, and the output end of the power input side circuit is connected with the input end of the power output side circuit through electromagnetic induction; the output end of the power output side circuit is connected with an external charging device;
the control loop comprises a sampling circuit and a signal control circuit; the input end of the sampling circuit is connected with the output end of the power output side circuit; the input end of the signal control circuit is connected with the output end of the sampling circuit, and the output end of the signal control circuit is connected with the pulse signal source.
The power input side circuit comprises an LC resonance circuit formed by a first coupling coil and a first capacitor and a driving circuit which is connected with the LC resonance circuit and drives the LC resonance circuit;
the power output side circuit comprises a second coupling coil and a first diode rectifier bridge or MOS tube synchronous rectifier circuit, wherein one end of the second coupling coil is in electromagnetic induction with the first coupling coil, and the first diode rectifier bridge or MOS tube synchronous rectifier circuit is connected with the other end of the second coupling coil.
The driving circuit in the power input side circuit is one of a symmetrical half-bridge circuit, an asymmetrical half-bridge circuit and a full-bridge circuit.
The asymmetrical half-bridge circuit comprises a half-bridge driving chip, a second diode rectifier bridge, a first MOS (metal oxide semiconductor) tube and a second MOS tube; wherein,
the half-bridge driving chip is connected with the pulse signal source, the grid electrode of the first MOS tube and the grid electrode of the second MOS tube;
the drain electrode of the first MOS tube is connected with the external voltage source through the second diode rectifier bridge, and the source electrode of the first MOS tube is connected with the drain electrode of the second MOS tube and one end of the LC resonance circuit;
and the source electrode of the second MOS tube is connected with the other end of the LC resonance circuit and is grounded.
The first MOS tube and the second MOS tube are both N-channel MOS tubes.
The sampling circuit comprises a first single chip microcomputer, a voltage acquisition circuit and a light emitting diode; the first single chip microcomputer is connected with the output end of the voltage acquisition circuit and the anode of the light-emitting diode; the input end of the voltage acquisition circuit is connected with the output end of the power output side circuit; the cathode of the light emitting diode is grounded;
the signal control circuit comprises a second singlechip and a photosensitive sensor; the photosensitive sensor is matched with the light emitting diode, one end of the photosensitive sensor is grounded, and the other end of the photosensitive sensor is connected with the second singlechip; the second single chip microcomputer is also connected with the pulse signal source.
The light-emitting diode is a light-emitting diode with the wavelength of 300nM-750 nM; the photosensitive sensor is a photosensitive diode with the wavelength of 300nM-750 nM.
The sampling circuit further comprises a first three-terminal voltage regulator connected with the first single chip microcomputer.
The signal control circuit further comprises a second three-terminal voltage regulator connected with the second single chip microcomputer.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the embodiment of the utility model provides an in, because control circuit is two independent circuits with power return circuit among the wireless drive power supply, and the circuit is simple reliable, can not only distinguish control circuit and power return circuit for reduce circuit complexity, still make control signal can not superpose on power return circuit, avoid output voltage or electric current waveform to have control signal's composition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.
Fig. 1 is a schematic diagram of a system structure connection of a wireless driving power supply according to an embodiment of the present invention;
FIG. 2 is a system architecture diagram of the power circuit of FIG. 1;
FIG. 3 is a schematic diagram of another system architecture connection of the power circuit of FIG. 1;
FIG. 4 is a schematic diagram of the system configuration connections of the power input side circuit of FIGS. 2 and 3 when the driving circuit is an asymmetric half-bridge circuit;
FIG. 5 is a schematic diagram of a system architecture of the control loop of FIG. 1;
FIG. 6 is a schematic diagram of another system architecture connection of the control loop of FIG. 1;
FIG. 7 is a diagram of an application scenario of the power input side circuit of FIGS. 2 and 3;
FIG. 8 is a diagram of an application scenario of the power output side circuit of FIGS. 2 and 3;
FIG. 9 is a diagram of an application scenario of the sampling circuit of FIGS. 5 and 6;
fig. 10 is a diagram of an application scenario of the signal control circuit in fig. 5 and 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, a wireless driving power supply is provided, which includes a power loop 1 and a control loop 2; wherein,
the power circuit 1 includes a power input side circuit 11 and a power output side circuit 12; the first input end a1 of the power input side circuit 11 is connected with an external voltage source Ud, the second input end a2 is connected with a pulse signal source PWM with variable signal frequency, and the output end a3 is connected with the input end of the power output side circuit 12 through electromagnetic induction, and is used for generating corresponding electric energy according to the signal frequency of the pulse signal source PWM and transmitting the electric energy to the power output side circuit 12; the output end of the power output side circuit 12 is connected to an external charging device (not shown) for transmitting and supplying electric energy to the external charging device;
the control loop 2 includes a sampling circuit 21 and a signal control circuit 22; wherein, the input end of the sampling circuit 21 is connected with the output end of the power output side circuit 12, and is used for sensing the voltage and/or current output by the power output side circuit 12; the input end of the signal control circuit 22 is connected to the output end of the sampling circuit 21, and the output end is connected to the pulse signal source PWM, for identifying the magnitude of the voltage and/or current induced by the sampling circuit 21, and adjusting the signal frequency of the pulse signal source PWM according to the identified magnitude of the voltage and/or current, so that the signal frequency of the pulse signal source PWM is changed within a constant range, and the output voltage or current of the power output side circuit 12 can be controlled to be maintained at a corresponding preset value.
It should be noted that the signal control circuit 22 may identify the magnitude of the voltage and/or current induced by the sampling circuit 21 directly, or may further perform determination identification according to the value. For example, the recognized value is compared with a preset threshold value, and recognition is determined by the open/close state of a switch, light or other physical object according to the comparison result.
In the embodiment of the present invention, as shown in fig. 2 and 3, the power input side circuit 11 includes an LC resonance circuit 111 formed by a first coupling coil 1111 and a first capacitor 1112, and a drive circuit 112 connected to the LC resonance circuit 111 and driving the LC resonance circuit 111; the power output side circuit 12 includes a second coupling coil 121 having one end that performs electromagnetic induction with the first coupling coil 1111, and a first diode rectifier bridge 122 (shown in fig. 2) or a MOS transistor synchronous rectifier circuit 123 (shown in fig. 3) connected to the other end of the second coupling coil 121. The driving circuit 112 in the power input side circuit 11 is one of a symmetric half-bridge circuit, an asymmetric half-bridge circuit, and a full-bridge circuit.
In one embodiment, as shown in fig. 4, the asymmetric half-bridge circuit includes a half-bridge driving chip 1121, a second diode rectifying bridge 1122, a first MOS transistor 1123, and a second MOS transistor 1124; wherein,
the half-bridge driving chip 1121 is connected with a pulse signal source PWM, a grid electrode G of the first MOS tube 1123 and a grid electrode G of the second MOS tube 1124;
the drain D of the first MOS transistor 1123 is connected to the external voltage source Ud through the second diode rectifier bridge 1122, and the source S is connected to the drain D of the second MOS transistor 1124 and one end of the LC resonant circuit 111;
the source S of the second MOS transistor 1124 is connected to the other end of the LC resonant circuit 111 and to ground.
The first MOS transistor 1123 and the second MOS transistor 1124 are both N-channel MOS transistors.
In the embodiment of the present invention, as shown in fig. 5, the sampling circuit 21 includes a first single chip 211, a voltage collecting circuit 212, and a light emitting diode 213; the first single chip microcomputer 211 is connected with the output end of the voltage acquisition circuit 212 and the positive pole (+) of the light emitting diode 213; the input end of the voltage acquisition circuit 212 is connected with the output end of the power output side circuit 12; the cathode (-) of the led 213 is grounded; the signal control circuit 22 comprises a second singlechip 221 and a photosensitive sensor 222; wherein, the photosensitive sensor 222 is matched with the light emitting diode 213 for sensing the light signal emitted by the light emitting diode 213, one end of which is grounded, and the other end of which is connected with the second singlechip 221; the second single chip 221 is also connected to a pulse signal source PWM. In one embodiment, the light emitting diode 213 is a light emitting diode with a wavelength between 300nM and 750 nM; the light sensitive sensor 222 is a photodiode with a wavelength between 300nM and 750 nM.
Of course, as shown in fig. 6, in order to ensure the stability of the voltages collected and generated by the sampling circuit 21 and the signal control circuit 22, the sampling circuit 21 further includes a first three-terminal regulator 214 connected to the first single chip 211; the signal control circuit 22 further includes a second three-terminal regulator 223 connected to the second single-chip microcomputer 221.
The embodiment of the utility model provides an in the theory of operation of wireless drive power supply do: electric energy is transmitted from the input side to the output side through an electromagnetic field between the first coupling coil 1111 of the power input side circuit 11 and the second coupling coil 121 of the power output side circuit 12 in the power loop 1, the sampling circuit 21 in the control loop 2 collects signals of output voltage and/or current of the power output side circuit 12, then the light emitting diode 213 is driven to emit light through electro-optical conversion, the light sensor 222 of the signal control circuit 22 in the control loop 2 receives an optical signal of the light emitting diode 213, and the optical signal is converted into a corresponding electric pulse signal through the electro-optical conversion to adjust the signal frequency of the pulse signal source PWM, so that the signal frequency of the pulse signal source PWM is changed within a constant range to control the output voltage or current of the power output side circuit 22 to be maintained at a corresponding preset value.
As shown in fig. 7 to fig. 10, further description is made on application scenarios of the wireless driving power supply in the embodiment of the present invention:
fig. 7 is a power input side circuit. IC101 is the half-bridge driver chip, and T101 is first MOS pipe, and T102 is the second MOS pipe, and D101-D104 constitute the second diode rectifier bridge, and L101 is first coupling coil, and C104 is first electric capacity. At the moment, the IC101, the D101-D104 and the T101/T102 form a driving circuit of an asymmetric half-bridge circuit; l101 and C104 constitute an LC resonant circuit, and the resonant frequency is fo. Meanwhile, IC102 forms an auxiliary power supply circuit on the power input side, and provides VCC0 to the signal control circuit in the control loop, and simultaneously provides V10 to the half-bridge driving circuit formed by IC 101.
Fig. 8 is a power output side circuit. L201 is a second coupling coil, and D201-D204 form a first diode rectifier bridge. At this time, the first coupling coil L101 in fig. 7 and the second coupling coil L201 in fig. 8 constitute a near-field coupling coil, and energy is coupled from the first coupling coil L101 to the second coupling coil L201. The two coupling coils L101 and L201 are not connected with each other, so that a wireless constant voltage power supply is realized.
Fig. 9 is a sampling circuit. U301 is a first three-terminal regulator which converts the output voltage Vo to an auxiliary power source VS; r301 and R302 form a voltage acquisition circuit, and sampling signals are input to an ADC (analog to digital converter) end of the first singlechip U302; the LED401 is a light emitting diode.
Fig. 10 is a signal control circuit. U602 is a second three-terminal regulator, which converts the auxiliary power supply VCC0 in fig. 7 into an auxiliary power supply VP; the second singlechip U601 performs signal processing; the photodiode P501 is a photosensor and receives an optical signal from the LED 401.
At this time, after the wireless driving power is powered on, the signal frequency fs of the half-bridge driving signal PWM1 obtained by the power input side circuit as the pulse signal source is gradually reduced from high to fo, and the power output side circuit obtains electric energy through the second coupling coil L201 to output the voltage Vo. As the signal frequency fs of the half-bridge driving signal PWM1 gradually decreases from high to fo, the output voltage Vo collected by the sampling circuit gradually increases, VS stabilizes and starts the first single-chip microcomputer U302 of the sampling circuit to output an electric pulse driving signal PWM2 with a variable duty ratio as a handshake signal to drive the 4-LED 401 to emit light. Once the photosensitive sensor P501 in the signal control circuit receives the handshake signal of the 4 LED401, a feedback voltage Vf is generated to the second monolithic computer U602, and the second monolithic computer U602 enters a normal working state after detecting the handshake signal, at this time, the second monolithic computer U602 performs frequency adjustment on the signal PWM1 of the pulse signal source according to Vf, and inputs the adjusted signal PWM1 to the IC101 half-bridge driving chip to drive the asymmetric half-bridge. When Vo reaches a stable value, the duty ratio of the handshake signal PWM2 output by the first single chip microcomputer U302 also reaches a stable value, so that the value of the feedback voltage Vf in the signal control circuit is also stable, and therefore the frequency fs of the signal PWM1 of the pulse signal source is stabilized at a certain working frequency to perform a small closed-loop adjustment, so as to stabilize the output voltage Vo.
When the power output side circuit is not placed close to the power input side circuit, or when an iron sheet is close to the power input side circuit, although the driving frequency fs of the power input side circuit is slowly reduced from a high value to the resonant frequency fo of the coupling coil, the photosensitive sensor P501 does not receive the handshake signal of the light emitting diode LED401, the power input side circuit works in a hiccup state, for example, the power input side circuit stops working for 30 seconds, then the signal frequency fs of the power input side circuit is slowly reduced from a high value to the resonant frequency fo, and the process is repeated until the photosensitive sensor P501 receives the signal of the light emitting diode LED401, and then the closed-loop working state is entered. Therefore, the power input side circuit can be prevented from always outputting a high-strength electromagnetic field, which can possibly interfere nearby electrical equipment, and can possibly form eddy current loss in an adjacent iron sheet, waste electric energy and even generate safety accidents such as fire danger and the like.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the embodiment of the utility model provides an in, because control circuit is two independent circuits with power return circuit among the wireless drive power supply, and the circuit is simple reliable, can not only distinguish control circuit and power return circuit for reduce circuit complexity, still make control signal can not superpose on power return circuit, avoid output voltage or electric current waveform to have control signal's composition.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.
Claims (9)
1. A wireless driving power supply is characterized by comprising a power loop and a control loop; wherein,
the power loop comprises a power input side circuit and a power output side circuit; the first input end of the power input side circuit is connected with an external voltage source, the second input end of the power input side circuit is connected with a pulse signal source with variable signal frequency, and the output end of the power input side circuit is connected with the input end of the power output side circuit through electromagnetic induction; the output end of the power output side circuit is connected with an external charging device;
the control loop comprises a sampling circuit and a signal control circuit; the input end of the sampling circuit is connected with the output end of the power output side circuit; the input end of the signal control circuit is connected with the output end of the sampling circuit, and the output end of the signal control circuit is connected with the pulse signal source.
2. The wireless drive power supply according to claim 1, wherein the power input side circuit includes an LC resonance circuit formed by the first coupling coil and the first capacitance, and a drive circuit connected to the LC resonance circuit and driving the LC resonance circuit;
the power output side circuit comprises a second coupling coil and a first diode rectifier bridge or MOS tube synchronous rectifier circuit, wherein one end of the second coupling coil is in electromagnetic induction with the first coupling coil, and the first diode rectifier bridge or MOS tube synchronous rectifier circuit is connected with the other end of the second coupling coil.
3. The wireless driving power supply according to claim 2, wherein the driving circuit in the power input side circuit is one of a symmetrical half-bridge circuit, an asymmetrical half-bridge circuit, and a full-bridge circuit.
4. The wireless driving power supply according to claim 3, wherein the asymmetric half-bridge circuit comprises a half-bridge driving chip, a second diode rectifier bridge, a first MOS transistor and a second MOS transistor; wherein,
the half-bridge driving chip is connected with the pulse signal source, the grid electrode of the first MOS tube and the grid electrode of the second MOS tube;
the drain electrode of the first MOS tube is connected with the external voltage source through the second diode rectifier bridge, and the source electrode of the first MOS tube is connected with the drain electrode of the second MOS tube and one end of the LC resonance circuit;
and the source electrode of the second MOS tube is connected with the other end of the LC resonance circuit and is grounded.
5. The wireless driving power supply according to claim 4, wherein the first MOS transistor and the second MOS transistor are both N-channel type MOS transistors.
6. The wireless driving power supply of claim 1, wherein the sampling circuit comprises a first single chip microcomputer, a voltage acquisition circuit and a light emitting diode; the first single chip microcomputer is connected with the output end of the voltage acquisition circuit and the anode of the light-emitting diode; the input end of the voltage acquisition circuit is connected with the output end of the power output side circuit; the cathode of the light emitting diode is grounded;
the signal control circuit comprises a second singlechip and a photosensitive sensor; the photosensitive sensor is matched with the light emitting diode, one end of the photosensitive sensor is grounded, and the other end of the photosensitive sensor is connected with the second singlechip; the second single chip microcomputer is also connected with the pulse signal source.
7. The wireless driving power supply according to claim 6, wherein the light emitting diode is a light emitting diode with a wavelength between 300nM and 750 nM; the photosensitive sensor is a photosensitive diode with the wavelength of 300nM-750 nM.
8. The wireless driving power supply of claim 7, wherein the sampling circuit further comprises a first three-terminal regulator connected to the first single-chip microcomputer.
9. The wireless driving power supply of claim 7, wherein the signal control circuit further comprises a second three-terminal regulator connected to the second single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820313547.0U CN208028768U (en) | 2018-03-07 | 2018-03-07 | A kind of wireless driving power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820313547.0U CN208028768U (en) | 2018-03-07 | 2018-03-07 | A kind of wireless driving power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208028768U true CN208028768U (en) | 2018-10-30 |
Family
ID=63906291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820313547.0U Withdrawn - After Issue CN208028768U (en) | 2018-03-07 | 2018-03-07 | A kind of wireless driving power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208028768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108347159A (en) * | 2018-03-07 | 2018-07-31 | 深圳市博为光电股份有限公司 | A kind of wireless driving power |
| CN111275952A (en) * | 2019-02-01 | 2020-06-12 | 奥克斯空调股份有限公司 | Wireless communication system and air conditioner direct current motor power supply system using same |
-
2018
- 2018-03-07 CN CN201820313547.0U patent/CN208028768U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108347159A (en) * | 2018-03-07 | 2018-07-31 | 深圳市博为光电股份有限公司 | A kind of wireless driving power |
| CN108347159B (en) * | 2018-03-07 | 2023-10-27 | 深圳市博为光电股份有限公司 | Wireless driving power supply |
| CN111275952A (en) * | 2019-02-01 | 2020-06-12 | 奥克斯空调股份有限公司 | Wireless communication system and air conditioner direct current motor power supply system using same |
| CN111275952B (en) * | 2019-02-01 | 2021-05-18 | 奥克斯空调股份有限公司 | Wireless communication system and air conditioner direct current motor power supply system using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8988901B2 (en) | Switching power supply device | |
| US7755914B2 (en) | Pulse frequency to voltage conversion | |
| CN105375798B (en) | Adaptively sampled circuit, primary side feedback constant-voltage system and switch power supply system | |
| EP2737617B1 (en) | A control ic of a switch power supply and a switch power supply using the same | |
| US20160134131A1 (en) | Power-supplying device and wireless power-supplying system | |
| US8259471B2 (en) | Converter that actuates a switch corresponding to a detected valley of a resonance waveform | |
| US11817792B2 (en) | Switching-type regulation driver and regulation driving method thereof | |
| US20130334893A1 (en) | Power transmission system and power transmitting apparatus | |
| CN208028768U (en) | A kind of wireless driving power | |
| CN103728578B (en) | Demagnetization detection method, move back magnetic sensor circuit and application the circuit constant-flow driver | |
| TW201241591A (en) | Current regulation apparatus | |
| US20160329825A1 (en) | Smart matching step-down circuits and travel-use power conversion devices | |
| US20130010501A1 (en) | Bisynchronous resonant switching-type direct current power supply | |
| KR20010070504A (en) | Zero voltage switching power supply with burst mode | |
| TWI533745B (en) | Light source driving circuit, controller and method for controlling power converter | |
| WO2016049988A1 (en) | Smart matching step-down circuit and travel-use power conversion device | |
| US10236720B2 (en) | Wireless power transfer system and driving method thereof | |
| CN205160398U (en) | Self -adaptation sampling circuit , printed circuit board , former limit feedback constant voltage system and switching power supply system | |
| US7760519B2 (en) | Primary only control quasi resonant convertor | |
| US7830676B2 (en) | Primary only constant voltage/constant current (CVCC) control in quasi resonant convertor | |
| CN112203381B (en) | Dimming control circuit and control method thereof | |
| KR101185534B1 (en) | Power supply for preventing flickering of led lamp | |
| CN108347159B (en) | Wireless driving power supply | |
| CN111988880A (en) | Constant-power ballast circuit with dimming function and control method | |
| KR102195566B1 (en) | Wireless power transfer system and driving method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181030 Effective date of abandoning: 20231027 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181030 Effective date of abandoning: 20231027 |