CN106879096B - Electromagnetic oven - Google Patents
Electromagnetic oven Download PDFInfo
- Publication number
- CN106879096B CN106879096B CN201710098122.2A CN201710098122A CN106879096B CN 106879096 B CN106879096 B CN 106879096B CN 201710098122 A CN201710098122 A CN 201710098122A CN 106879096 B CN106879096 B CN 106879096B
- Authority
- CN
- China
- Prior art keywords
- power supply
- pin
- circuit
- field effect
- capacitor
- 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
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cookers (AREA)
Abstract
The invention discloses an electromagnetic oven, which comprises an electromagnetic oven pot body, an electromagnetic coil, a low-voltage power circuit, an oscillating circuit and a power amplifying circuit, wherein the electromagnetic coil is arranged below the electromagnetic oven pot body, and the low-voltage power circuit is connected with the electromagnetic coil through the oscillating circuit and the power amplifying circuit. The utility model discloses an electromagnetism stove adopts 12v direct current power supply, and operating voltage is low for on-vehicle or outdoor or students' dormitory time, can avoid because the potential safety hazard that brings of voltage too high. Meanwhile, pulse heating is realized through the oscillating circuit and the power amplifying circuit, and electric energy can be saved.
Description
Technical Field
The invention belongs to the technical field of electric appliance control, and particularly relates to an electromagnetic oven.
Background
The electromagnetic oven has all household, belongs to kitchen electric appliances, and is generally used for boiling water, frying dishes and chafing dish. Because it heats up quickly, it is highly preferred. Because the working voltage is 220v, the device is inconvenient to use outdoors, in a vehicle or in a dormitory, and is only suitable for household use.
Disclosure of Invention
The invention aims to solve the problem of providing the electromagnetic oven which adopts low-voltage power supply, can be used outdoors, on-board or in a student dormitory, and has high safety.
The technical scheme adopted by the invention is as follows: the utility model provides an electromagnetism stove, includes electromagnetism stove pot body and solenoid, solenoid sets up under the electromagnetism stove pot body, still includes low voltage power supply circuit, oscillating circuit and power amplification circuit, low voltage power supply circuit passes through oscillating circuit and power amplification circuit and is connected with solenoid, wherein:
the low-voltage power supply circuit comprises a 12V power supply;
the oscillating circuit adopts an SG3525 control chip to generate high-frequency signals;
the power amplifying circuit comprises a plurality of N-channel field effect transistors and is used for amplifying output current.
The technical scheme is further improved, and the protection circuit is arranged between the low-voltage power supply circuit and the oscillating circuit and comprises a power supply reverse connection alarm protection diode.
The technical scheme is further improved to be that the control circuit further comprises a control circuit, wherein the control circuit comprises a power control switch for controlling the whole circuit to supply power, a heating switch for controlling the oscillating circuit to supply power and a frequency adjusting switch.
The power amplifying circuit comprises field effect transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8, wherein drains of the field effect transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8 are connected with a power supply negative electrode, sources of the field effect transistors Q1, Q2, Q3 and Q4 are connected with one end of an inductor L3, the other end of the inductor L3 is connected with sources of the field effect transistors Q5, Q6, Q7 and Q8, a center tap of the inductor L3 is connected with a power supply positive electrode, sources of the field effect transistors Q1, Q2, Q3 and Q4 are also connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with sources of the field effect transistors Q5, Q6, Q7 and Q8, gates of the field effect transistors Q1, Q2, Q3 and Q4 are connected with a pin 11 of a control chip SG3525, and gates of the field effect transistors Q5, Q6, Q7 and Q8 are connected with a chip SG 14.
The oscillating circuit comprises an SG3525 control chip, wherein a pin 1 of the SG3525 is connected with a power supply cathode through a resistor R1, a pin 2 is connected with the power supply cathode through a resistor R3, pins 3 and 4 are empty pins, a pin 5 is connected with the power supply cathode through a capacitor C1, a pin 6 is connected with the power supply cathode through an RP1, a pin 7 is connected with a pin 5 through a resistor R4, a pin 8 is connected with the power supply cathode through a capacitor C3, a pin 9 is connected with a common end of the RP2, one end of the RP2 is connected with a pin 16, the other end of the RP2 is connected with the power supply cathode through a resistor R8, a pin 10 is connected with the power supply cathode through a resistor R6, a pin 11 is connected with a grid electrode of a field effect transistor Q1, a pin 12 is connected with a power supply cathode of a pin 15 and is connected with a power supply cathode of a diode D3 through an inductor L1, and a positive electrode of the diode D3 is connected with one end of a switch S2; the 16 pins pass through resistors R2 to 2 pins.
The technical scheme is further improved, the low-voltage power supply circuit further comprises a work indicator lamp and a filter capacitor, the work indicator lamp comprises a light-emitting diode D2, the filter capacitor comprises a capacitor C6 and an electrolytic capacitor C2, the anode of the electrolytic capacitor C2 is connected with the anode of a power supply at one end of the capacitor C6, the cathode of the electrolytic capacitor C2 is connected with the cathode of the power supply at the other end of the capacitor C6, the anode of the electrolytic capacitor C2 is connected with the anode of the light-emitting diode D2 through a resistor R5, and the cathode of the light-emitting diode D2 is connected with the cathode of the power supply.
Compared with the prior art, the invention has the beneficial effects that:
the induction cooker disclosed by the patent application adopts a 12v low-voltage battery to supply power, so that the induction cooker is convenient to move and use; because the 12v direct current power supply is adopted, the working voltage is low, and the device can avoid potential safety hazards caused by overhigh voltage when being used in a vehicle or outdoors or in a dormitory. Meanwhile, pulse heating is realized through the oscillating circuit and the power amplifying circuit, and electric energy can be saved.
Drawings
FIG. 1 is a block diagram of an induction cooker according to the present invention;
FIG. 2 is a schematic circuit diagram of an induction cooker according to the present invention;
fig. 3 is a pin function diagram of the SG3525 control chip.
Reference numerals: a low-voltage power supply circuit-1; a protection circuit-2; an oscillating circuit-3; an electromagnetic coil-4; a control circuit-5; a power amplifying circuit-6.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
An induction cooker as shown in fig. 1 and 2 comprises an induction cooker pot body and an induction coil 4, wherein the induction coil 4 is arranged below the induction cooker pot body, so that the induction cooker pot body can be heated through the induction coil 4, and an iron pot can be adopted for the induction cooker pot body. The electromagnetic oven further comprises a low-voltage power circuit 1, an oscillating circuit 3 and a power amplifying circuit 6, wherein the low-voltage power circuit 1 is connected with the electromagnetic coil 4 through the oscillating circuit 3 and the power amplifying circuit 6, and the electromagnetic oven comprises the following components: the low-voltage power supply circuit 1 comprises a 12V power supply; the oscillating circuit 3 adopts an SG3525 control chip to generate high-frequency signals; the power amplifying circuit 6 includes a plurality of N-channel field effect transistors for amplifying an output current.
Preferably, the induction cooker may further comprise a protection circuit 2, the protection circuit 2 is arranged between the low-voltage power supply circuit 1 and the oscillating circuit 3, and the protection circuit 2 comprises a power supply reverse connection alarm protection diode.
Preferably, the induction cooker may further comprise a control circuit 5, wherein the control circuit 5 comprises a power control switch S1 for controlling the power supply of the whole circuit, a heating switch for controlling the power supply of the oscillating circuit 3 and a frequency adjusting switch S2. One end of the power control switch S1 is connected with the positive electrode of the power supply, the other end of the power control switch S1 is connected with the positive electrode of the light emitting diode D1 through the resistor R7, the negative electrode of the light emitting diode D1 is connected with the negative electrode of the power supply, and preferably, the resistor R7 is 1k omega. The other end of the power control switch S1 is also connected with one end of the switch S2, the center tap of the inductor L3 and the cathode of the diode D4, and the anode of the diode D4 is grounded.
As shown in fig. 2, specifically, the power amplifying circuit 6 may include field effect transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8, wherein drains of the field effect transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8 are connected to a negative electrode of a power source, sources of the field effect transistors Q1, Q2, Q3 and Q4 are connected to one end of an inductor L3, the other end of the inductor L3 is connected to sources of the field effect transistors Q5, Q6, Q7 and Q8, a center tap of the inductor L3 is connected to a positive electrode of a power source, sources of the field effect transistors Q1, Q2, Q3 and Q4 are also connected to one end of a capacitor C5, the other end of the capacitor C5 is connected to sources of the field effect transistors Q5, Q6, Q7 and Q8, preferably, the capacitor C5 is 2Uf, gates of the field effect transistors Q1, Q2, Q3 and Q4 are connected to a pin 11 of a control chip of the field effect transistor SG3525, and pins of the control chip Q5, SG 7 and SG 25 are connected to pins of the chip 3525. The oscillating circuit 3 comprises an SG3525 control chip, pin 1 of SG3525 (pin 1 of SG3525 is the 1 st pin of SG3525, and the following description of each pin is similar) is connected with a power supply negative electrode through a resistor R1, preferably, the resistor R1 is 10kΩ, pin 2 is connected with the power supply negative electrode through a resistor R3, preferably, the resistor R3 is 5.1kΩ, pins 3 and 4 are empty pins, pin 5 is connected with the power supply negative electrode through a capacitor C1, pin 6 is connected with the power supply negative electrode through RP1, preferably, the maximum resistor RP1 is 30kΩ, pin 7 is connected with pin 5 through a resistor R4, preferably, the resistor R4 is 47 Ω, the 8-pin is connected with the positive electrode of the electrolytic capacitor C3, the negative electrode of the electrolytic capacitor C3 is connected with the negative electrode of a power supply, preferably, the electrolytic capacitor C3 is 2.2Uf, the 9-pin is connected with the public end of the RP2, one end of the RP2 is connected with the 16-pin, the other end of the RP2 is connected with the negative electrode of the power supply through a resistor R8, preferably, the RP2 is a maximum resistor of 1kΩ, the 10-pin is connected with the negative electrode of the power supply through a resistor R6, preferably, the resistor R6 is a resistor of 2kΩ, the 11-pin is connected with the grid electrode of the field effect transistor Q1, the 12-pin is connected with the negative electrode of the power supply, the 13-pin is connected with the 15-pin and is connected with the negative electrode of the diode D3 through an inductor L1, and the positive electrode of the diode D3 is connected with one end of the switch S2; the 16 pins pass through the resistors R2 to 2 pins, and the resistor R2 is preferably 5.1kΩ.
The SG3525 control chip is a monolithic integrated PWM control chip with complete functions and strong universality, is convenient and flexible to use, and has the output drive of a push-pull output mode, so that the driving capability is improved; the internal part of the device comprises an under-voltage locking circuit, a soft start control circuit and a PWM latch, has an over-current protection function, is adjustable in frequency, and can limit the maximum duty ratio. The pin function diagram is shown in fig. 3, and the main parameters are as follows:
1. the working voltage range is wide: 8-35V.
2. A reference voltage source of 5.1V + -1.0% is built in.
3. The working frequency of the oscillator in the chip is 100 Hz-400 kHz wide.
4. Has the function of external synchronization of the oscillator.
5. The dead time is adjustable. In order to meet the requirement of driving the fast field effect transistor, the final stage adopts a push-pull type working circuit, so that the switching speed is higher, and the maximum value of the output or the absorbed current of the final stage can reach 400mA.
6. An under-voltage locking circuit is arranged in the circuit. When the input voltage is less than 8V, the chip is internally locked, and the operation (except the reference source and the necessary circuits) is stopped, so that the consumption current is reduced to be less than 2mA.
7. There is a soft start circuit. The inverting input end of the comparator, namely the pin 8 of the soft start control end chip, can be externally connected with a soft start capacitor. The reference voltage Uref inside the capacitor is supplied by a constant current source, the time to reach 2.5V is t= (2.5V/50 μa) C, and the duty ratio is changed from small to large (50%).
8. Built-in PWM (pulse width modulation). The latch removes all jitter and oscillation signals from the comparator. The reset can be performed only in the next clock cycle, and the reliability of the system is high.
Preferably, the low-voltage power supply circuit 1 further includes a work indicator lamp and a filter capacitor, the work indicator lamp includes a light emitting diode D2, the filter capacitor includes a capacitor C6 and an electrolytic capacitor C2, the positive electrode of the electrolytic capacitor C2 is connected with the positive electrode of the power supply at one end of the capacitor C6, the negative electrode of the electrolytic capacitor C2 is connected with the negative electrode of the power supply at the other end of the capacitor C6, preferably, the capacitor C6 is 100pF, the electrolytic capacitor C2 is 1000UF, the positive electrode of the electrolytic capacitor C2 is connected with the positive electrode of the light emitting diode D2 through a resistor R5, preferably, the resistor R5 is 1kΩ, and the negative electrode of the light emitting diode D2 is connected with the negative electrode of the power supply.
Compared with the prior art, the invention has the beneficial effects that:
the induction cooker disclosed by the patent application adopts a 12v low-voltage battery to supply power, so that the induction cooker is convenient to move and use; because the 12v direct current power supply is adopted, the working voltage is low, and the device can avoid potential safety hazards caused by overhigh voltage when being used in a vehicle or outdoors or in a dormitory. Meanwhile, pulse heating is realized through the oscillating circuit 3 and the power amplifying circuit 6, and electric energy can be saved.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments will fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (3)
1. The utility model provides an electromagnetism stove, includes electromagnetism stove pot body and electromagnetic coil, electromagnetic coil sets up under the electromagnetism stove pot body, its characterized in that: the low-voltage power supply circuit is connected with the electromagnetic coil through the oscillating circuit and the power amplifying circuit, wherein:
the low-voltage power supply circuit comprises a 12V power supply;
the oscillating circuit adopts an SG3525 control chip to generate high-frequency signals;
the power amplifying circuit comprises a plurality of N-channel field effect transistors and is used for amplifying output current;
the power amplifying circuit comprises field effect transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8, wherein drains of the field effect transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8 are connected with a power supply negative electrode, sources of the field effect transistors Q1, Q2, Q3 and Q4 are connected with one end of an inductor L3, the other end of the inductor L3 is connected with sources of the field effect transistors Q5, Q6, Q7 and Q8, a center tap of the inductor L3 is connected with a power supply positive electrode, sources of the field effect transistors Q1, Q2, Q3 and Q4 are also connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with sources of the field effect transistors Q5, Q6, Q7 and Q8, gates of the field effect transistors Q1, Q2, Q3 and Q4 are connected with a pin 11 of an SG3525 control chip, and gates of the field effect transistors Q5, Q6, Q7 and Q8 are connected with a pin 14 of the SG3525 control chip;
the oscillating circuit comprises an SG3525 control chip, wherein a pin 1 of the SG3525 is connected with a power supply cathode through a resistor R1, a pin 2 is connected with a power supply cathode through a resistor R3, pins 3 and 4 are blank pins, a pin 5 is connected with the power supply cathode through a capacitor C1, a pin 6 is connected with the power supply cathode through an RP1, a pin 7 is connected with a pin 5 through a resistor R4, a pin 8 is connected with the power supply cathode through a capacitor C3, a pin 9 is connected with a public end of an RP2, one end of the RP2 is connected with a pin 16, the other end of the RP2 is connected with the power supply cathode through a resistor R8, a pin 10 is connected with the power supply cathode through a resistor R6, a pin 11 is connected with a grid electrode of a field effect transistor Q1, a pin 12 is connected with a power supply cathode, a pin 13 is connected with a pin 15 and is connected with a power supply cathode of a diode D3 through an inductor L1, and a positive electrode of the diode D3 is connected with one end of a switch S2; 16 pins pass through resistors R2 to 2 pins;
the low-voltage power supply circuit comprises a low-voltage power supply circuit, and is characterized in that the low-voltage power supply circuit further comprises a work indicator lamp and a filter capacitor, the work indicator lamp comprises a light-emitting diode D2, the filter capacitor comprises a capacitor C6 and an electrolytic capacitor C2, the positive electrode of the electrolytic capacitor C2 is connected with one end of the capacitor C6, the negative electrode of the electrolytic capacitor C2 is connected with the negative electrode of the power supply, the positive electrode of the electrolytic capacitor C2 is connected with the positive electrode of the light-emitting diode D2 through a resistor R5, and the negative electrode of the light-emitting diode D2 is connected with the negative electrode of the power supply.
2. The induction cooker as claimed in claim 1, wherein: the protection circuit is arranged between the low-voltage power supply circuit and the oscillating circuit, and the protection circuit comprises a power supply reverse connection alarm protection diode.
3. An induction cooker as claimed in claim 2, wherein: the control circuit comprises a power control switch for controlling the power supply of the whole circuit, a heating switch for controlling the power supply of the oscillating circuit and a frequency adjusting switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098122.2A CN106879096B (en) | 2017-02-22 | 2017-02-22 | Electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098122.2A CN106879096B (en) | 2017-02-22 | 2017-02-22 | Electromagnetic oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106879096A CN106879096A (en) | 2017-06-20 |
| CN106879096B true CN106879096B (en) | 2023-09-26 |
Family
ID=59168617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710098122.2A Active CN106879096B (en) | 2017-02-22 | 2017-02-22 | Electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106879096B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108420117B (en) * | 2018-05-14 | 2024-04-23 | 顺德职业技术学院 | Electronic cigarette controller based on direct-current low-voltage electromagnetic heating technology |
| US11825987B2 (en) * | 2021-03-18 | 2023-11-28 | Kenyon International, Inc. | DC cooking appliance |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2349472Y (en) * | 1998-12-01 | 1999-11-17 | 梁均详 | Environment protection energy-saving electromagnetic stove |
| CN1373322A (en) * | 2001-12-08 | 2002-10-09 | 刘希真 | High-frequency electromagnetic oven |
| CN201119038Y (en) * | 2007-11-13 | 2008-09-17 | 美的集团有限公司 | Control device of electromagnetic oven |
| WO2009117929A1 (en) * | 2008-03-24 | 2009-10-01 | Yu Zhengguo | Induction heating power supply circuit |
| WO2010142190A1 (en) * | 2009-06-08 | 2010-12-16 | 深圳市鑫汇科科技有限公司 | Large power electromagnetic cooker circuit based on system-on-chip (soc) |
| CN201757437U (en) * | 2010-06-28 | 2011-03-09 | 泉州市盛行电子科技有限公司 | Stepless temperature-adjustable environment-friendly commercial induction cooker |
| CN102781130A (en) * | 2012-07-30 | 2012-11-14 | 东莞市精诚电能设备有限公司 | Large-power electromagnetic cooker circuit based on power electronic technology |
| CN202840661U (en) * | 2012-09-20 | 2013-03-27 | 深圳市鑫汇科电子有限公司 | Low standby power consumption electromagnetic oven circuit |
| CN104617802A (en) * | 2015-01-20 | 2015-05-13 | 桑露萍 | Inverter circuit for backup power source of fire resisting shutter |
| CN105636258A (en) * | 2014-10-31 | 2016-06-01 | 陕西盛迈石油有限公司 | Low-power induction cooker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754506B (en) * | 2008-12-12 | 2013-03-20 | 深圳市鑫汇科科技有限公司 | Electromagnetic oven power automatic calibration method and circuit |
-
2017
- 2017-02-22 CN CN201710098122.2A patent/CN106879096B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2349472Y (en) * | 1998-12-01 | 1999-11-17 | 梁均详 | Environment protection energy-saving electromagnetic stove |
| CN1373322A (en) * | 2001-12-08 | 2002-10-09 | 刘希真 | High-frequency electromagnetic oven |
| CN201119038Y (en) * | 2007-11-13 | 2008-09-17 | 美的集团有限公司 | Control device of electromagnetic oven |
| WO2009117929A1 (en) * | 2008-03-24 | 2009-10-01 | Yu Zhengguo | Induction heating power supply circuit |
| WO2010142190A1 (en) * | 2009-06-08 | 2010-12-16 | 深圳市鑫汇科科技有限公司 | Large power electromagnetic cooker circuit based on system-on-chip (soc) |
| CN201757437U (en) * | 2010-06-28 | 2011-03-09 | 泉州市盛行电子科技有限公司 | Stepless temperature-adjustable environment-friendly commercial induction cooker |
| CN102781130A (en) * | 2012-07-30 | 2012-11-14 | 东莞市精诚电能设备有限公司 | Large-power electromagnetic cooker circuit based on power electronic technology |
| CN202840661U (en) * | 2012-09-20 | 2013-03-27 | 深圳市鑫汇科电子有限公司 | Low standby power consumption electromagnetic oven circuit |
| CN105636258A (en) * | 2014-10-31 | 2016-06-01 | 陕西盛迈石油有限公司 | Low-power induction cooker |
| CN104617802A (en) * | 2015-01-20 | 2015-05-13 | 桑露萍 | Inverter circuit for backup power source of fire resisting shutter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106879096A (en) | 2017-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106879096B (en) | Electromagnetic oven | |
| CN104578743A (en) | Power supply control circuit | |
| CN104578885A (en) | High-power inverter circuit used for family standby power source | |
| CN209221330U (en) | Drive control circuit and physiotherapy equipment | |
| CN207975006U (en) | driving circuit | |
| CN105307293A (en) | Electric cooker heating circuit powered by 220V AC voltage | |
| CN101737820B (en) | Energy and electricity saving microwave oven | |
| CN208094825U (en) | heating circuit and induction cooker | |
| WO2018006767A1 (en) | Induction cooktop having adjustable continuous power | |
| CN201466379U (en) | Energy-saving power socket | |
| CN202331082U (en) | External automatic controller for electric food warmer | |
| CN114157143B (en) | Refrigerator constant power defrosting circuit based on boost topological structure | |
| CN202067102U (en) | 24V direct current electric pressure cooker control circuit | |
| CN209517544U (en) | Electromagnetic heating circuit and electromagnetic oven | |
| CN204168496U (en) | A kind of control circuit of heater | |
| CN203967985U (en) | LC series connection self-oscillation voltage conversion circuit | |
| CN205490465U (en) | 555 timer control's electric switch circuit | |
| CN105450018A (en) | Power boost chopper control system | |
| CN204793470U (en) | Multi -functional timing socket | |
| CN106612075B (en) | It is a kind of to reduce method, the circuit, device that electric shock injures | |
| CN204206515U (en) | Electromagnetic Heating control circuit and electromagnetic heater | |
| CN217307566U (en) | Inverter circuit capable of outputting 50Hz modified square waves | |
| CN204242979U (en) | A kind of control circuit controlling trip coil and drive | |
| CN203180885U (en) | Optical control circuit based on decimal counter pulse frequency divider | |
| CN209840198U (en) | High-power commercial induction cooker with three points of five kilowatts to thirty-five kilowatts |
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 |