CN108314146B - Reverse pole control circuit and water purifier - Google Patents
Reverse pole control circuit and water purifier Download PDFInfo
- Publication number
- CN108314146B CN108314146B CN201810076806.7A CN201810076806A CN108314146B CN 108314146 B CN108314146 B CN 108314146B CN 201810076806 A CN201810076806 A CN 201810076806A CN 108314146 B CN108314146 B CN 108314146B
- Authority
- CN
- China
- Prior art keywords
- switch
- module
- control
- unit
- subunit
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 4
- 108010001267 Protein Subunits Proteins 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses an inverse pole control circuit and a water purifier, comprising: the control module outputs a control signal to the electrode driving module; the isolation voltage reduction module is connected with the first direct current, performs signal isolation and voltage reduction treatment on the first direct current to obtain a second direct current, and outputs the second direct current to the electrode driving module; the constant current source module is connected with a first direct current to obtain a constant current signal, and the constant current signal is output to the electrode driving module, so that the electrode driving module outputs a constant current signal for inverting the electrode; the electrode driving module controls the first input end and the first output end to be conducted, the second input end and the second output end to be disconnected or the first input end and the first output end to be disconnected, and the second input end and the second output end to be conducted according to the control signal. The invention can realize the constant current pole inverting function, has simple circuit structure, and ensures the long service life and good working state of the electrode.
Description
Technical Field
The invention relates to the technical field of inverting poles, in particular to an inverting pole control circuit and a water purifier.
Background
The polarity of the electrode is changed by the polarity reversal. In some electrolysis processes, long-term use can form pollutants on the surface of the electrode, influence the electrolysis efficiency and reduce the service life of the electrode. If the polarities of the two electrodes are frequently interchanged, the formation of pollutants on the surface of the electrodes can be effectively prevented, and the electrolysis efficiency and the service life of the electrodes are favorably maintained. At present, a double-pole double-throw relay is generally adopted to realize the pole reversing function, but the pole reversing speed is influenced by the mechanical response speed and the relay switching times, and the normal service life of the product cannot be reached.
Therefore, the problem that the service life of the product is shortened because the reverse pole speed is influenced by the mechanical response speed and the switching times of the relay exists in the prior art.
Disclosure of Invention
The embodiment of the invention provides a pole inversion control circuit and a water purifier, which aim to solve the problem that the service life of a product is shortened because the pole inversion speed is influenced by the mechanical response speed and the switching times of a relay in the prior art.
A first aspect of an embodiment of the present invention provides an inverse pole control circuit, which includes a control module, an isolation buck module, a constant current source module, and an electrode driving module.
The output end of the control module is connected with the control end of the electrode driving module, the output end of the isolation voltage reduction module is connected with the driving end of the electrode driving module, the output end of the constant current source module is connected with the first input end and the second input end of the electrode driving module, the first output end of the electrode driving module is connected with the first pole of the load electrode, and the second output end of the electrode driving module is connected with the second pole of the load electrode.
The control module outputs a control signal to the electrode driving module.
The isolation voltage reduction module is connected with the first direct current, performs signal isolation and voltage reduction on the first direct current to obtain a second direct current, and outputs the second direct current to the electrode driving module.
The constant current source module is connected with the first direct current to obtain a constant current signal, and the constant current signal is output to the electrode driving module, so that the electrode driving module outputs the constant current signal.
The electrode driving module controls the first input end and the first output end to be conducted, the second input end and the second output end to be disconnected or the first input end and the first output end to be disconnected, and the second input end and the second output end to be conducted according to the control signal.
In one embodiment, the electrode driving module includes a first switching unit and a second switching unit.
The first control end and the second control end of the first switch switching unit are respectively a first control end and a second control end of the electrode driving module. The first control end and the second control end of the second switch switching unit are respectively a third control end and a fourth control end of the electrode driving module.
The first driving end of the first switch switching unit and the first driving end of the second switch switching unit are connected together to form a first driving end of the electrode driving module, and the second driving end of the first switch switching unit and the second driving end of the second switch switching unit are connected together to form a second driving end of the electrode driving module.
The current input end of the first switch switching unit is a first input end of the electrode driving module, and the current output end of the first switch switching unit is a first output end of the electrode driving module.
The current input end of the second switch switching unit is the second input end of the electrode driving module, and the current output end of the second switch switching unit is the second output end of the electrode driving module.
In one embodiment, the first switching unit includes a first switching subunit, a second switching subunit, a third switching subunit, and a fourth switching subunit.
The controlled end of the first switch subunit is a first control end of the first switch switching unit, the first end of the first switch subunit is connected with the controlled end of the third switch subunit, the power end, the first driving end, the second driving end and the current input end of the third switch subunit are in one-to-one correspondence with the power end, the first driving end, the second driving end and the current input end of the first switch switching unit, the first output end and the second output end of the third switch subunit are respectively connected with the first end and the controlled end of the fourth switch subunit in one-to-one correspondence, the controlled end of the second switch subunit is a second control end of the first switch switching unit, and the first end of the second switch subunit and the second end of the fourth switch subunit are in common connection to form the current output end of the first switch switching unit.
In one embodiment, the second switching unit includes a fifth switching sub-unit, a sixth switching sub-unit, a seventh switching sub-unit, and an eighth switching sub-unit.
The controlled end of the fifth switch subunit is a first control end of the second switch switching unit, the first end of the fifth switch subunit is connected with the controlled end of the seventh switch subunit, the power end, the first driving end, the second driving end and the current input end of the seventh switch subunit are in one-to-one correspondence with the power end, the first driving end, the second driving end and the current input end of the second switch switching unit, the first output end and the second output end of the seventh switch subunit are respectively connected with the first end and the controlled end of the eighth switch subunit in one-to-one correspondence, the controlled end of the sixth switch subunit is the second control end of the second switch switching unit, and the first end of the sixth switch subunit and the second end of the eighth switch subunit are connected together to form the current output end of the second switch switching unit.
In one embodiment, the isolated buck module includes an isolated power supply unit.
The power supply end, the positive output end and the negative output end of the isolation power supply unit are respectively in one-to-one correspondence with the power supply end, the first output end and the second output end of the isolation voltage reduction module.
The second direct current includes a positive signal and a negative signal.
The isolation power supply unit is connected to the first direct current, and outputs positive signals and negative signals after signal isolation and voltage reduction processing.
In one embodiment, the constant current source module includes an input filter unit, a constant current driving unit, a switch control unit, and a constant current output unit.
The input end of the input filter unit is the input end of the constant current source module, the first output end of the input filter unit is connected with the first end of the switch control unit, the second output end of the input filter unit is connected with the power end of the constant current drive unit, the output drive end of the constant current drive unit is connected with the controlled end of the switch control unit, the first current sampling end of the constant current drive unit is connected with the second end of the switch control unit and the input end of the constant current output unit, the second current sampling end of the constant current drive unit is connected with the ground, and the output end of the constant current output unit is the output end of the constant current source module.
In one embodiment, the inverted pole control circuit further comprises a power module for outputting a first direct current.
In one embodiment, the inverting control circuit further includes a voltage conversion module. The voltage conversion module is respectively connected with the electrode driving module and the control module.
The voltage conversion module outputs power supply signals to the electrode driving module and the control module respectively.
In one embodiment, the inverting control circuit further includes a master switch module connected to the control module, the master switch module outputting a switch signal to the control module.
A first aspect of an embodiment of the present invention provides a water purifier, including a load electrode and an inverter control circuit as described above connected to the load electrode.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the on-off state of the electrode driving module is controlled by the control module, the electrode driving module is driven by the isolation voltage reduction module, and the constant current source module is used for enabling the electrode driving module to output constant current signals. The constant current pole inverting function can be realized, the circuit structure is simple, and the long service life and good working state of the electrode are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of an inverter control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of the electrode driving module in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a circuit structure of the isolated buck module of FIG. 1 according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of the constant current source module in fig. 1 according to an embodiment of the present invention.
Detailed Description
In order to make the present solution better understood by those skilled in the art, the technical solution in the present solution embodiment will be clearly described below with reference to the accompanying drawings in the present solution embodiment, and it is obvious that the described embodiment is an embodiment of a part of the present solution, but not all embodiments. All other embodiments, based on the embodiments in this solution, which a person of ordinary skill in the art would obtain without inventive faculty, shall fall within the scope of protection of this solution.
The term "comprising" in the description of the present solution and the claims and in the above figures, as well as any other variants, means "including but not limited to", intended to cover a non-exclusive inclusion. Furthermore, the terms "first" and "second," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
The implementation of the invention is described in detail below with reference to the specific drawings:
fig. 1 shows a structure of an inverter control circuit according to an embodiment of the present invention, and for convenience of explanation, only the portions related to the embodiment of the present invention are shown in detail as follows:
as shown in fig. 1, the inverted pole control circuit provided by the embodiment of the invention comprises a control module 100, an isolated buck module 200, a constant current source module 300 and an electrode driving module 400.
The output end of the control module 100 is connected with the control end of the electrode driving module 400, the output end of the isolation voltage reduction module 200 is connected with the driving end of the electrode driving module 400, the output end of the constant current source module 300 is commonly connected with the first input end and the second input end of the electrode driving module 400, the first output end of the electrode driving module 400 is connected with the first pole A of the load electrode 500, and the second output end of the electrode driving module 400 is connected with the second pole B of the load electrode 500.
The control module 100 outputs a control signal to the electrode driving module 400.
The isolation voltage reduction module 200 is connected to the first direct current VCC, performs signal isolation and voltage reduction on the first direct current VCC to obtain a second direct current, and outputs the second direct current to the electrode driving module 400 to drive the electrode driving module 400.
The constant current source module 300 is connected with the first direct current VCC to obtain a constant current signal Ic, and outputs the constant current signal Ic to the electrode driving module 400, so that the electrode driving module 400 outputs the constant current signal Ic.
The electrode driving module 400 controls the first input terminal and the first output terminal to be on, the second input terminal and the second output terminal to be off or the first input terminal and the first output terminal to be off, and the second input terminal and the second output terminal to be on according to the control signal.
In the present embodiment, the electrode driving module 400 is switched between two operation states according to the control signal. The operating states of the electrode driving module 400 include:
in the first operating state, the first input terminal and the first output terminal of the electrode driving module 400 are turned on and the second input terminal and the second output terminal are turned off.
In the second operating state, the first input terminal and the first output terminal of the electrode driving module 400 are turned off and the second input terminal and the second output terminal are turned on.
In this embodiment, the first input terminal and the second input terminal of the electrode driving module 400 are connected to the constant current signal Ic, respectively.
In the first operating state, when the first input terminal and the first output terminal of the electrode driving module 400 are turned on and the second input terminal and the second output terminal are turned off, the first output terminal of the electrode driving module 400 outputs the constant current signal Ic, so that the constant current signal Ic flows in from the first pole and flows out from the second pole of the load electrode 500.
In the second operating state, when the first input terminal and the first output terminal of the electrode driving module 400 are disconnected and the second input terminal and the second output terminal are turned on, the second output terminal of the electrode driving module 400 outputs the constant current signal Ic, so that the constant current signal Ic flows in from the second pole of the load electrode 500 and flows out from the first pole.
In a specific application, the voltage of the first direct current VCC is 24V and the voltage of the second direct current is 5V.
In this embodiment, the control signal changes according to the preset frequency, so that the output direction of the constant current signal Ic also changes alternately according to the preset frequency.
The embodiment of the invention can realize the constant current pole inverting function, has a simple circuit structure, and ensures that the electrode has longer service life and good working state.
Fig. 2 shows a block structure of an electrode driving module 400 according to an embodiment of the present invention, and for convenience of explanation, only the portions related to the embodiment of the present invention are shown in detail as follows:
as shown in fig. 2, in one embodiment of the present invention, the electrode driving module 400 of fig. 1 includes a first switching unit 410 and a second switching unit 420.
The first control terminal and the second control terminal of the first switch switching unit 410 are the first control terminal and the second control terminal of the electrode driving module 400, respectively. The first control terminal and the second control terminal of the second switch switching unit 420 are the third control terminal and the fourth control terminal of the electrode driving module 400, respectively.
The first driving end of the first switching unit 410 and the first driving end of the second switching unit 420 are commonly connected to form a first driving end of the electrode driving module 400, and the second driving end of the first switching unit 410 and the second driving end of the second switching unit 420 are commonly connected to form a second driving end of the electrode driving module 400.
The current input end of the first switch switching unit 410 is the first input end of the electrode driving module, and the current output end of the first switch switching unit 410 is the first output end of the electrode driving module.
The current input end of the second switch switching unit 420 is the second input end of the electrode driving module, and the current output end of the second switch switching unit 420 is the second output end of the electrode driving module.
In one embodiment, the power supply terminal of the first switching unit 410 is connected to the power supply signal +5v, and the power supply terminal of the second switching unit 410 is also connected to the power supply signal +5v.
In the present embodiment, the control signals output by the control module 100 include a first control signal A1, a second control signal A2, a third control signal B1, and a fourth control signal B2.
The first control terminal and the second control terminal of the first switch switching unit 410 are respectively connected to the first control signal A1 and the second control signal A2.
The first control terminal and the second control terminal of the second switch switching unit 420 are respectively connected to the third control signal B1 and the fourth control signal B2.
In this embodiment, the second direct current output by the isolated buck-module 200 includes a positive going signal vo+ and a negative going signal VO-.
The first and second driving terminals of the electrode driving module 400 are respectively connected to the positive signal vo+ and the negative signal VO-.
That is, the first driving end and the second driving end of the first switching unit 410 are connected to the positive signal vo+ and the negative signal VO-, respectively, for driving the first switching unit 410.
The first driving end and the second driving end of the second switch switching unit 420 are connected to the positive signal vo+ and the negative signal VO-, respectively, for driving the second switch switching unit 410.
In the present embodiment, the constant current signal Ic output by the constant current source module 300. The current input terminal of the first switching unit 410 and the current input terminal of the second switching unit 420 are both connected to the constant current signal Ic.
The working principle of the embodiment of the invention is as follows:
the first switching unit 410 switches between an on state and an off state according to the first control signal A1 and the second control signal A2. The on state of the first switch switching unit 410 is that the current input terminal and the current output terminal of the first switch switching unit 410 are on, and the off state of the first switch switching unit 410 is that the current input terminal and the current output terminal of the first switch switching unit 410 are off. Specifically, the first switching unit 410 switches between an on state and an off state according to the level of the first control signal A1 and the second control signal A2. When the first switching unit 410 is in the on state, the first switching unit 410 outputs the constant current signal Ic to the first pole a of the load electrode 500.
The second switching unit 420 switches between an on state and an off state according to the third control signal B1 and the fourth control signal B2. The on state of the second switch switching unit 420 is that the current input terminal and the current output terminal of the second switch switching unit 420 are on, and the off state of the second switch switching unit 420 is that the current input terminal and the current output terminal of the second switch switching unit 420 are off. Specifically, the second switching unit 420 switches between the on state and the off state according to the level of the third control signal B1 and the fourth control signal B2. When the second switching unit 420 is in the on state, the second switching unit 420 outputs the constant current signal Ic to the second pole B of the load electrode 500.
Alternatively, the first and second switching units 410 and 420 cannot be simultaneously in the on state.
As shown in fig. 2, in one embodiment of the present invention, the first switching unit 410 includes a first switching sub-unit 411, a second switching sub-unit 412, a third switching sub-unit 413, and a fourth switching sub-unit 414.
The controlled end of the first switch subunit 411 is a first control end of the first switch subunit 410, the first end of the first switch subunit 411 is connected with the controlled end of the third switch subunit 413, the power end, the first driving end, the second driving end and the current input end of the third switch subunit 413 are in one-to-one correspondence with the power end, the first driving end, the second driving end and the current input end of the first switch subunit 410, the first output end and the second output end of the third switch subunit 413 are respectively connected with the first end and the controlled end of the fourth switch subunit 414 in one-to-one correspondence, the controlled end of the second switch subunit 412 is the second control end of the first switch subunit 410, and the first end of the second switch subunit 412 is connected with the second end of the fourth switch subunit 414 together to form the current output end of the first switch subunit 410.
In the embodiment of the present invention, the controlled terminal of the first switch subunit 411 is connected to the first control signal A1, and controls the first terminal thereof to be connected or disconnected with the ground according to the first control signal A1. The controlled terminal of the second switch subunit 412 is connected to the second control signal A2, and controls the first terminal thereof to be connected or disconnected with the ground according to the second control signal A2. The power supply of the third switching subunit 413 is connected to the power supply signal +5v, the first driving end is connected to the positive signal vo+, the second driving end is connected to the negative signal VO-, and the current input is connected to the constant current signal Ic.
When the first terminal of the first switching sub-unit 411 is turned on with the ground, the first terminal of the second switching sub-unit 412 is turned off with the ground, the third switching sub-unit 413 controls the first terminal and the second terminal of the fourth switching sub-unit 414 to be turned on, and the constant current signal Ic is input from the current input terminal of the third switching sub-unit 413 and output from the second terminal of the fourth switching sub-unit 414. Thereby, the current output terminal of the first switching unit 410 outputs the constant current signal Ic.
When the first terminal of the first switching sub-unit 411 is disconnected from the ground, the first terminal of the second switching sub-unit 412 is turned on, and the third switching sub-unit 413 controls the first terminal and the second terminal of the fourth switching sub-unit 414 to be disconnected, thereby grounding the current output terminal of the first switching sub-unit 410.
Fig. 2 shows a specific circuit structure of the first switch switching unit 410 according to an embodiment of the present invention, which is described in detail below:
in one embodiment, the first switching sub-unit 411 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first switching transistor Q1.
The first end of the sixth resistor R6 is a controlled end of the first switch subunit 411, the second end of the sixth resistor R6 is commonly connected with the first end of the fifth resistor R5 and the gate of the first switch tube Q1, the second end of the fifth resistor R5 is commonly connected with the source of the first switch tube Q1 to be grounded, the first end of the fourth resistor R4 is a first end of the first switch subunit 411, and the second end of the fourth resistor R4 is connected with the drain of the first switch tube Q1.
In a specific application, the first switching tube Q1 is an NMOS tube.
In one embodiment, the second switching sub-unit 412 includes a seventh resistor R7, an eighth resistor R8, and a second switching tube Q2.
The first end of the eighth resistor R8 is a controlled end of the second switching subunit 412, the second end of the eighth resistor R8 is commonly connected with the first end of the seventh resistor R7 and the gate of the second switching tube Q2, the second end of the seventh resistor R7 is commonly connected with the source of the second switching tube Q2 to the ground, and the drain of the second switching tube Q2 is the first end of the second switching subunit 412.
In a specific application, the second switching tube Q2 is an NMOS tube.
In one embodiment, the third switching sub-unit 413 includes a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1, a first optocoupler U1, and a third switching tube Q3.
The first end of the first resistor R1 and the first end of the second resistor R2 are commonly connected to form a current input end and a first output end of the third switch subunit 413, the second end of the first resistor R1 is a first driving end of the third switch subunit 413, the positive input end of the first optocoupler U1 is a power supply end of the third switch subunit 413, the negative input end of the first optocoupler U1 is a controlled end of the third switch subunit 413, the second end of the second resistor R2, the positive output end of the first optocoupler U1, the collector of the third switch tube Q3 and the cathode of the first diode D1 are commonly connected to form a second output end of the third switch subunit 413, the negative output end of the first optocoupler U1 is commonly connected to the base of the third switch tube Q3 and the first end of the third resistor R3, and the emitter of the third switch tube Q3 is commonly connected to the second end of the third resistor R3 and the anode of the first diode D1 to form a second driving end of the third switch subunit 413.
In a specific application, the third switching transistor Q3 is a switching transistor.
In one embodiment, the fourth switching subunit 414 includes a fourth switching tube Q4. The source, gate and drain of the fourth switching tube Q4 are respectively in one-to-one correspondence with the first terminal, the controlled terminal and the second terminal of the fourth switching subunit 414.
In a specific application, the fourth switching tube Q4 is a PMOS tube.
The working principle of the embodiment of the invention is as follows: when the first control signal A1 is at a high level, the second control signal A2 is at a low level, the first switching tube Q1 is turned on, the second switching tube Q2 is turned off, the first optocoupler U1 works, the third switching tube Q3 is turned on, the fourth switching tube Q4 is turned on, and at this time, the current output end of the first switching unit 410 outputs the constant current signal Ic. When the first control signal A1 is at a low level, the second control signal A2 is at a high level, the first switching tube Q1 is turned off, the second switching tube Q2 is turned on, the first optocoupler U1 does not work, the third switching tube Q3 is turned off, the fourth switching tube Q4 is turned off, and at this time, the current output terminal of the first switching unit 410 is grounded.
As shown in fig. 2, in one embodiment of the present invention, the second switching unit 420 includes a fifth switching sub-unit 421, a sixth switching sub-unit 422, a seventh switching sub-unit 423, and an eighth switching sub-unit 424.
The controlled end of the fifth switch subunit 421 is the first control end of the second switch subunit 420, the first end of the fifth switch subunit 421 is connected with the controlled end of the seventh switch subunit 423, the power end, the first driving end, the second driving end and the current input end of the seventh switch subunit 423 are in one-to-one correspondence with the power end, the first driving end, the second driving end and the current input end of the second switch subunit 420, the first output end and the second output end of the seventh switch subunit 423 are respectively connected with the first end and the controlled end of the eighth switch subunit 424 in one-to-one correspondence, the controlled end of the sixth switch subunit 422 is the second control end of the second switch subunit 420, and the first end of the sixth switch subunit 422 is commonly connected with the second end of the eighth switch subunit 424 to form the current output end of the second switch subunit 420.
In the embodiment of the present invention, the controlled end of the fifth switch subunit 421 is connected to the third control signal B1, and controls the first end thereof to be connected or disconnected with the ground according to the third control signal B1. The controlled terminal of the sixth switch subunit 422 is connected to the fourth control signal B2, and controls the first terminal thereof to be turned on or off with the ground according to the fourth control signal B2. The power supply of the seventh switching subunit 423 is connected to the power supply signal +5v, the first driving end is connected to the positive signal vo+, the second driving end is connected to the negative signal VO-, and the current input is connected to the constant current signal Ic.
When the first terminal of the fifth switching sub-unit 421 is turned on with the ground, the first terminal of the sixth switching sub-unit 422 is turned off with the ground, the seventh switching sub-unit 423 controls the first terminal and the second terminal of the eighth switching sub-unit 424 to be turned on, and the constant current signal Ic is input from the current input terminal of the seventh switching sub-unit 423 and output from the second terminal of the eighth switching sub-unit 424. Thereby, the current output terminal of the second switching unit 420 outputs the constant current signal Ic.
When the first terminal of the fifth switching sub-unit 421 is turned off from the ground, the first terminal of the sixth switching sub-unit 422 is turned on from the ground, and the seventh switching sub-unit 423 controls the first terminal and the second terminal of the eighth switching sub-unit 424 to be turned off, thereby grounding the current output terminal of the second switching sub-unit 420.
Fig. 2 shows a specific circuit structure of the second switch switching unit 420 according to an embodiment of the present invention, which is described in detail below:
in one embodiment, the fifth switching sub-unit 421 includes a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a fifth switching transistor Q5.
The first end of the sixteenth resistor R16 is a controlled end of the fifth switch subunit 421, the second end of the sixteenth resistor R16 is commonly connected with the first end of the fifteenth resistor R15 and the gate of the fifth switch tube Q5, the second end of the fifteenth resistor R15 is commonly connected with the source of the fifth switch tube Q5 to be grounded, the first end of the fourteenth resistor R14 is a first end of the fifth switch subunit 421, and the second end of the fourteenth resistor R14 is connected with the drain of the fifth switch tube Q5.
In a specific application, the fifth switching transistor Q5 is an NMOS transistor.
In one embodiment, the sixth switching subunit 422 includes a seventeenth resistor R17, an eighteenth resistor R18, and a sixth switching tube Q6.
The first end of the eighteenth resistor R18 is a controlled end of the sixth switching subunit 422, the second end of the eighteenth resistor R18 is commonly connected with the first end of the seventeenth resistor R17 and the gate of the sixth switching tube Q6, the second end of the seventeenth resistor R17 is commonly connected with the source of the sixth switching tube Q6 to the ground, and the drain of the sixth switching tube Q6 is the first end of the sixth switching subunit 422.
In a specific application, the sixth switching transistor Q6 is an NMOS transistor.
In one embodiment, the seventh switching sub-unit 423 includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a second diode D2, a second optocoupler U2, and a seventh switching tube Q7.
The first end of the eleventh resistor R11 and the first end of the twelfth resistor R12 are commonly connected to form a current input end and a first output end of the seventh switching subunit 423, the second end of the eleventh resistor R11 is the first driving end of the seventh switching subunit 423, the positive input end of the second optocoupler U2 is the power supply end of the seventh switching subunit 423, the negative input end of the second optocoupler U2 is the controlled end of the seventh switching subunit 423, the second end of the twelfth resistor R12, the positive output end of the second optocoupler U2, the collector of the seventh switching tube Q7 and the cathode of the second diode D2 are commonly connected to form the second output end of the seventh switching subunit 423, the negative output end of the second optocoupler U2 is commonly connected to the base of the seventh switching tube Q7 and the first end of the thirteenth resistor R13, and the emitter of the seventh switching tube Q7 is commonly connected to the second end of the thirteenth resistor R13 and the anode of the second diode D2 to form the second driving end of the seventh switching subunit 423.
In a specific application, the seventh switching transistor Q7 is a switching transistor.
In one embodiment, the eighth switching subunit 424 includes an eighth switching tube Q8. The source, gate and drain of the eighth switching tube Q8 are respectively in one-to-one correspondence with the first terminal, the controlled terminal and the second terminal of the eighth switching subunit 424.
In a specific application, the eighth switching tube Q8 is a PMOS tube.
The working principle of the embodiment of the invention is as follows: when the third control signal B1 is at a high level, the fourth control signal B2 is at a low level, the fifth switching tube Q5 is turned on, the sixth switching tube Q6 is turned off, the second optocoupler U2 works, the seventh switching tube Q7 is turned on, the eighth switching tube Q8 is turned on, and at this time, the current output end of the second switching unit 420 outputs the constant current signal Ic. When the third control signal B1 is at a low level, the fourth control signal B2 is at a high level, the fifth switching tube Q5 is turned off, the sixth switching tube Q6 is turned on, the second optocoupler U2 does not work, the seventh switching tube Q7 is turned off, the eighth switching tube Q8 is turned off, and at this time, the current output terminal of the second switching unit 420 is grounded.
To sum up, the overall circuit operation in fig. 2 includes:
first state: when the first control signal A1 is at a high level, the second control signal A2 is at a low level, the third control signal B1 is at a low level, the fourth control signal B2 is at a high level, the fourth switching tube Q4 is turned on, the eighth switching tube Q8 is turned off, the sixth switching tube Q6 is turned on, and the constant current signal Ic flows into the first pole a of the load electrode 500 through the fourth switching tube Q4 and flows out from the second pole B, and is grounded through the sixth switching tube Q6.
Second state: when the first control signal A1 is at a low level, the second control signal A2 is at a high level, the third control signal B1 is at a high level, the fourth control signal B2 is at a low level, the second switching tube Q2 is turned on, the fourth switching tube Q4 is turned off, the eighth switching tube Q8 is turned on, and the constant current signal Ic flows into the second pole B of the load electrode 500 through the eighth switching tube Q8 and flows out from the first pole a, and is grounded through the second switching tube Q2.
The control module 100 controls the control signal to alternately switch between the first state and the second state at a preset frequency, thereby achieving an alternating current flow direction in the load electrode 500.
Fig. 3 shows a circuit structure of an isolated buck module 200 according to an embodiment of the invention, which is described in detail below:
as shown in fig. 3, in one embodiment of the present invention, the isolated buck-module 200 of fig. 1 includes an isolated power supply unit U3.
The power supply end, the positive output end and the negative output end of the isolated power supply unit U3 are respectively in one-to-one correspondence with the power supply end, the first output end and the second output end of the isolated voltage reduction module 200.
The second direct current comprises a positive going signal VO + and a negative going signal VO-.
The isolation power supply unit U3 is connected to the first direct current VCC, and outputs positive signals VO+ and negative signals VO-after signal isolation and voltage reduction processing.
In one embodiment, the isolated buck-module 200 further includes a first capacitance C1 and a second capacitance C2. The first capacitor C1 is connected between the power end and the grounding end of the isolated power unit U3, the grounding end of the isolated power unit U3 is grounded, and the second capacitor C2 is connected between the positive output end and the negative output end of the isolated power unit U3.
In one embodiment, the isolated power supply unit U3 includes DC power devices model NN1-24S 05.
In this embodiment, an isolated power supply unit is used, so that a driving voltage floating to the ground can be provided to the fourth switching tube Q4 and the eighth switching tube Q8 in the electrode driving module 400.
Fig. 4 shows a circuit structure of a constant current source module 300 according to an embodiment of the present invention, which is described in detail below:
as shown in fig. 4, in one embodiment of the present invention, the constant current source module 300 of fig. 1 includes an input filtering unit 310, a constant current driving unit 320, a switch control unit 330, and a constant current output unit 340.
The input end of the input filter unit 310 is the input end of the constant current source module 300, the first output end of the input filter unit 310 is connected with the first end of the switch control unit 330, the second output end of the input filter unit 310 is connected with the power end of the constant current drive unit 320, the output drive end of the constant current drive unit 320 is connected with the controlled end of the switch control unit 330, the first current sampling end of the constant current drive unit 320 is commonly connected with the second end of the switch control unit 330 and the input end of the constant current output unit 340, the second current sampling end of the constant current drive unit 320 is commonly connected with the ground, and the output end of the constant current output unit 340 is the output end of the constant current source module.
As shown in fig. 4, in one embodiment, the input filtering unit 310 includes a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a twentieth resistor R20, and a third diode D3.
The first terminal of the third capacitor C3, the first terminal of the fourth capacitor C4 and the anode of the third diode D3 are commonly connected to form an input terminal and a first output terminal of the input filter unit 310. The second end of the third capacitor C3 and the second end of the fourth capacitor C4 are both grounded, the cathode of the third diode D3 is connected to the first end of the twentieth resistor R20, the second end of the twentieth resistor R20 and the first end of the fifth capacitor C5 are commonly connected to form the second output end of the input filter unit 310, and the second end of the fifth capacitor C5 is grounded.
As shown in fig. 4, in one embodiment, the constant current drive unit 320 includes a constant current driver U4 of model QX 6103.
As shown in fig. 4, in one embodiment, the switch control unit 330 includes a ninth switching tube Q9. The drain, source and gate of the ninth switching transistor Q9 are respectively in one-to-one correspondence with the first terminal, the second terminal and the controlled terminal of the switching control unit 330.
As shown in fig. 4, in one embodiment, the constant current output unit 340 includes a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a first inductor L1, a second inductor L2, a sixth capacitor C6, a seventh capacitor C7, a fourth diode D4, and a fifth diode D5.
The first end of the twenty-first resistor R21, the first end of the twenty-second resistor R22 and the cathode of the fourth diode D4 are commonly connected to form an input end of the constant current output unit 340, the second end of the twenty-first resistor R21, the second end of the twenty-second resistor R22 and the first end of the first inductor L1 are commonly connected to ground, the second end of the first inductor L1, the first end of the sixth capacitor C6, the first end of the twenty-third resistor R23 and the first end of the second inductor L2 are commonly connected, the second end of the second inductor L2 and the anode of the fifth diode D5 are commonly connected to form an output end of the constant current output unit 340, the cathode of the fifth diode D5 is connected to the first end of the seventh capacitor C7, and the second end of the sixth capacitor C6, the anode of the fourth diode D4 and the second end of the seventh capacitor C7 are all grounded.
The constant current driving unit 320 in this embodiment is a high-order current detection constant current source, which can ensure that the output current is constant when the equivalent impedance of the load electrode changes in a larger range, so as to avoid the overload burnout of the load electrode. It can be realized that the constant current source module 300 can normally drive to operate when the voltage of the first direct current VCC varies with the load.
In one embodiment of the present invention, the inverter control circuit in fig. 1 further includes a power module for outputting the first direct current VCC.
In one embodiment of the present invention, the inverter control circuit in fig. 1 further includes a voltage conversion module. The voltage conversion module is connected with the electrode driving module 400 and the control module 100, respectively.
The voltage conversion module outputs a power supply signal +5v to the electrode driving module 400 and the control module 100, respectively.
In one embodiment of the present invention, the inverted pole control circuit in fig. 1 further includes a main switch module connected to the control module, and the main switch module outputs a switch signal to the control module 100 to turn on or off the control module 100.
In one embodiment, the main switch module is connected with the power module, and the main switch module outputs a switch signal to the power module to control the power module to be turned on or turned off.
The embodiment of the invention also provides a water purifier which comprises a load electrode and the inverse pole control circuit connected with the load electrode.
It should be noted that the ports or pins with the same reference numerals in the specification and the drawings of the present invention are connected.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The inverting control circuit is characterized by comprising a control module, an isolation voltage reduction module, a constant current source module and an electrode driving module;
the output end of the control module is connected with the control end of the electrode driving module, the output end of the isolation voltage reduction module is connected with the driving end of the electrode driving module, the output end of the constant current source module is commonly connected with the first input end and the second input end of the electrode driving module, the first output end of the electrode driving module is connected with the first pole of the load electrode, and the second output end of the electrode driving module is connected with the second pole of the load electrode;
the control module outputs a control signal to the electrode driving module;
the isolation voltage reduction module is connected with a first direct current, performs signal isolation and voltage reduction treatment on the first direct current to obtain a second direct current, and outputs the second direct current to the electrode driving module;
the constant current source module is connected with the first direct current to obtain a constant current signal, and the constant current signal is output to the electrode driving module, so that the electrode driving module outputs the constant current signal;
the electrode driving module controls the first input end and the first output end of the electrode driving module to be conducted, the second input end and the second output end of the electrode driving module to be disconnected or the first input end and the first output end of the electrode driving module to be disconnected, and the second input end and the second output end of the electrode driving module to be conducted according to the control signal;
the electrode driving module comprises a first switch switching unit and a second switch switching unit, and the control signals comprise a first control signal, a second control signal, a third control signal and a fourth control signal;
the first switch switching unit is switched between a conducting state and a disconnecting state according to the first control signal and the second control signal, the second switch switching unit is switched between the conducting state and the disconnecting state according to the third control signal and the fourth control signal, and the first switch switching unit and the second switch switching unit cannot be simultaneously in the conducting state;
the first switch switching unit comprises a first switch subunit, a second switch subunit, a third switch subunit and a fourth switch subunit;
the first switch subunit comprises a fourth resistor, a fifth resistor, a sixth resistor and a first switch tube; the second switch subunit comprises a seventh resistor, an eighth resistor and a second switch tube; the third switch subunit comprises a first resistor, a second resistor, a third resistor, a first diode, a first optocoupler and a third switch tube; the fourth switching subunit comprises a fourth switching tube;
when the first control signal is at a high level, the second control signal is at a low level, the first switching tube is turned on, the second switching tube is turned off, the first optocoupler works, the third switching tube is turned on, the fourth switching tube is turned on, and a current output end of the first switching unit outputs a constant current signal;
when the first control signal is at a low level, the second control signal is at a high level, the first switching tube is turned off, the second switching tube is turned on, the first optocoupler does not work, the third switching tube is turned off, the fourth switching tube is turned off, and the current output end of the first switching unit is grounded.
2. The inverted pole control circuit of claim 1, wherein the electrode drive module comprises a first switch switching unit and a second switch switching unit;
the first control end and the second control end of the first switch switching unit are respectively a first control end and a second control end of the electrode driving module; the first control end and the second control end of the second switch switching unit are respectively a third control end and a fourth control end of the electrode driving module;
the first driving end of the first switch switching unit and the first driving end of the second switch switching unit are connected together to form a first driving end of the electrode driving module, and the second driving end of the first switch switching unit and the second driving end of the second switch switching unit are connected together to form a second driving end of the electrode driving module;
the current input end of the first switch switching unit is a first input end of the electrode driving module, and the current output end of the first switch switching unit is a first output end of the electrode driving module;
the current input end of the second switch switching unit is the second input end of the electrode driving module, and the current output end of the second switch switching unit is the second output end of the electrode driving module.
3. The inverted pole control circuit of claim 2, wherein the first switch switching unit comprises a first switch subunit, a second switch subunit, a third switch subunit, and a fourth switch subunit;
the controlled end of the first switch subunit is a first control end of the first switch switching unit, the first end of the first switch subunit is connected with the controlled end of the third switch subunit, the power end, the first driving end, the second driving end and the current input end of the third switch subunit are in one-to-one correspondence with the power end, the first driving end, the second driving end and the current input end of the first switch switching unit, the first output end and the second output end of the third switch subunit are respectively connected with the first end and the controlled end of the fourth switch subunit in one-to-one correspondence, the controlled end of the second switch subunit is the second control end of the first switch switching unit, and the first end of the second switch subunit and the second end of the fourth switch subunit are connected together to form the current output end of the first switch switching unit.
4. The inverter control circuit of claim 2 wherein the second switch-switching unit comprises a fifth switch subunit, a sixth switch subunit, a seventh switch subunit, and an eighth switch subunit;
the controlled end of the fifth switch subunit is a first control end of the second switch switching unit, the first end of the fifth switch subunit is connected with the controlled end of the seventh switch subunit, the power end, the first driving end, the second driving end and the current input end of the seventh switch subunit are in one-to-one correspondence with the power end, the first driving end, the second driving end and the current input end of the second switch switching unit, the first output end and the second output end of the seventh switch subunit are respectively connected with the first end and the controlled end of the eighth switch subunit in one-to-one correspondence, the controlled end of the sixth switch subunit is a second control end of the second switch switching unit, and the first end of the sixth switch subunit and the second end of the eighth switch subunit are connected together to form a current output end of the second switch switching unit.
5. The inverter control circuit of claim 1 wherein the isolated buck module comprises an isolated power supply unit;
the power supply end, the positive output end and the negative output end of the isolation power supply unit are respectively in one-to-one correspondence with the power supply end, the first output end and the second output end of the isolation voltage reduction module;
the second direct current comprises a positive signal and a negative signal;
the isolation power supply unit is connected to the first direct current and outputs the positive signal and the negative signal after signal isolation and voltage reduction processing.
6. The inverted pole control circuit of claim 1, wherein the constant current source module comprises an input filter unit, a constant current drive unit, a switch control unit, and a constant current output unit;
the input end of the input filter unit is the input end of the constant current source module, the first output end of the input filter unit is connected with the first end of the switch control unit, the second output end of the input filter unit is connected with the power end of the constant current drive unit, the output drive end of the constant current drive unit is connected with the controlled end of the switch control unit, the first current sampling end of the constant current drive unit is connected with the second end of the switch control unit and the input end of the constant current output unit in a sharing way, the second current sampling end of the constant current drive unit is connected with the ground in a sharing way, and the output end of the constant current output unit is the output end of the constant current source module.
7. The inverter control circuit of claim 1, further comprising a power module for outputting the first direct current.
8. The inverter control circuit of claim 1, further comprising a voltage conversion module; the voltage conversion module is respectively connected with the electrode driving module and the control module;
the voltage conversion module outputs power supply signals to the electrode driving module and the control module respectively.
9. The pole inversion control circuit of any of claims 1 to 8, further comprising a master switch module coupled to the control module, the master switch module outputting a switch signal to the control module.
10. A water purifier comprising a load electrode and an inverter control circuit as claimed in any one of claims 1 to 9 connected to the load electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076806.7A CN108314146B (en) | 2018-01-26 | 2018-01-26 | Reverse pole control circuit and water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076806.7A CN108314146B (en) | 2018-01-26 | 2018-01-26 | Reverse pole control circuit and water purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108314146A CN108314146A (en) | 2018-07-24 |
| CN108314146B true CN108314146B (en) | 2024-01-05 |
Family
ID=62887213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810076806.7A Active CN108314146B (en) | 2018-01-26 | 2018-01-26 | Reverse pole control circuit and water purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108314146B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115161684A (en) * | 2022-07-21 | 2022-10-11 | 宁波市思虎电子科技有限公司 | Electrode reversing method of electrode device based on unstable power supply |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000054177A (en) * | 1998-07-31 | 2000-02-22 | Toto Ltd | Electrolyzer |
| CN1599426A (en) * | 2003-03-24 | 2005-03-23 | 传感电子公司 | Polarity correcting circuit and system incorporating the same |
| CN101888730A (en) * | 2010-06-30 | 2010-11-17 | 海洋王照明科技股份有限公司 | Alternating current constant current source LED driving circuit |
| CN201682408U (en) * | 2010-03-16 | 2010-12-22 | 刘国传 | Unipolar input and bipolar output voltage controlled constant current source with photoelectric isolation |
| CN104201882A (en) * | 2014-08-20 | 2014-12-10 | 华为技术有限公司 | Non-isolated voltage-stabilization current-sharing circuit and power supply system |
| CN205540314U (en) * | 2016-04-08 | 2016-08-31 | 厦门大学 | Electrodialysis is utmost point control system based on bus |
| DE102015211683A1 (en) * | 2015-06-24 | 2016-12-29 | WhiteRock Aktiengesellschaft | Method for charging target batteries with a buffer battery system |
| CN107623440A (en) * | 2017-09-27 | 2018-01-23 | 上海玮舟微电子科技有限公司 | Voltage conversion circuit and power supply switch circuit |
| CN208292715U (en) * | 2018-01-26 | 2018-12-28 | 深圳安吉尔饮水产业集团有限公司 | One kind falling pole control circuit and water purifier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752912B (en) * | 2012-06-01 | 2015-11-25 | 台达电子企业管理（上海）有限公司 | A kind of LED drive circuit |
-
2018
- 2018-01-26 CN CN201810076806.7A patent/CN108314146B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000054177A (en) * | 1998-07-31 | 2000-02-22 | Toto Ltd | Electrolyzer |
| CN1599426A (en) * | 2003-03-24 | 2005-03-23 | 传感电子公司 | Polarity correcting circuit and system incorporating the same |
| CN201682408U (en) * | 2010-03-16 | 2010-12-22 | 刘国传 | Unipolar input and bipolar output voltage controlled constant current source with photoelectric isolation |
| CN101888730A (en) * | 2010-06-30 | 2010-11-17 | 海洋王照明科技股份有限公司 | Alternating current constant current source LED driving circuit |
| CN104201882A (en) * | 2014-08-20 | 2014-12-10 | 华为技术有限公司 | Non-isolated voltage-stabilization current-sharing circuit and power supply system |
| DE102015211683A1 (en) * | 2015-06-24 | 2016-12-29 | WhiteRock Aktiengesellschaft | Method for charging target batteries with a buffer battery system |
| CN205540314U (en) * | 2016-04-08 | 2016-08-31 | 厦门大学 | Electrodialysis is utmost point control system based on bus |
| CN107623440A (en) * | 2017-09-27 | 2018-01-23 | 上海玮舟微电子科技有限公司 | Voltage conversion circuit and power supply switch circuit |
| CN208292715U (en) * | 2018-01-26 | 2018-12-28 | 深圳安吉尔饮水产业集团有限公司 | One kind falling pole control circuit and water purifier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108314146A (en) | 2018-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2985140C (en) | High speed switching solid state relay circuit | |
| CN100517541C (en) | Bistable contactor drive circuit | |
| CN106597907B (en) | Drive control circuit and robot | |
| CN108314146B (en) | Reverse pole control circuit and water purifier | |
| CN103890682A (en) | Driver circuit for a semiconductor power switch | |
| CN104079158A (en) | Ultra-low static power consumption power source starting control circuit | |
| RU2420858C2 (en) | Switching circuit and method to control power consumer | |
| CN203933487U (en) | A kind of commutation control module | |
| CN105811819B (en) | A kind of motor control metal-oxide-semiconductor driving circuit | |
| CN207705835U (en) | A kind of low power consumpting controling circuit for high-voltage battery system | |
| CN206041552U (en) | A protection device for preventing external battery joins conversely | |
| CN211720466U (en) | Synchronous rectification MOS tube driving circuit | |
| CN210156316U (en) | Novel magnetic latching relay drive circuit | |
| CN208292715U (en) | One kind falling pole control circuit and water purifier | |
| CN207732617U (en) | A kind of switching power circuit that safety is good | |
| CN211830526U (en) | Direct current single line homopolar control brush motor reversing drive switch device | |
| CN216672894U (en) | Positive and negative rotation control circuit of alternating current motor and electronic equipment | |
| CN208316606U (en) | A kind of positive and reverse rotation control circuit of direct current generator | |
| CN210041682U (en) | Control circuit and control system for starting alternating current motor | |
| CN219456753U (en) | Control circuit capable of switching passive output and active output | |
| CN204493223U (en) | deep-well pump | |
| CN102468789B (en) | Power polarity conversion circuit | |
| CN211046810U (en) | Circuit structure for detecting locked-rotor current of motor and controlling motor to rotate reversely | |
| CN217486414U (en) | Control circuit for driving direct current motor and massage chair | |
| CN209767377U (en) | Upper tube driving circuit of half-bridge circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |