CN207304965U - A kind of electromagnetic heater - Google Patents

Abstract

It the utility model is related to a kind of electromagnetic heater,Heater circuit built in electromagnetic heater,Alternating current meets varistor ZNR through fuse FOO1 in circuit,Varistor ZNR both ends shunt capacitance C1,Capacitance C1 connects the input terminal of rectifier bridge D401,The output terminal of rectifier bridge 401 is through inductance L1 through meeting capacitance C2,Inductance L1 connects the collector of brilliant lock body pipe Q001 at the same time,The collector of the emitter transistor Q002 of brilliant lock body pipe Q001,The collector of brilliant lock body pipe Q001 is through capacitance C001 sending and receiving emitter-base bandgap gradings at the same time,The base stage of brilliant lock body pipe Q001 is through resistance R001 connecting resistances R003,The both ends parallel diode D001 of resistance R003,Resistance R003 connects IGBT drive circuit,The emitter ground connection of brilliant lock body pipe Q002,The heating unit of the utility model design,Cost is low,It is stable.

Description

A kind of electromagnetic heater

Technical field

It the utility model is related to circuitry field, more particularly to a kind of electromagnetic heater.

Background technology

Electromagnetism builds that thermal is of high cost, volume weight is big now, while noise big severe jamming user operation when running, Improve power consumption at the same time.

Utility model content

The purpose of this utility model is to provide a kind of electromagnetic heater, to solve above-mentioned technical problem, in realization State purpose the utility model and use following technical scheme：

A kind of electromagnetic heater, heater circuit built in electromagnetic heater, alternating current connects pressure through fuse FOO1 in circuit Quick resistance ZNR, varistor ZNR both ends shunt capacitance C1, capacitance C1 connect the input terminal of rectifier bridge D401, rectifier bridge 401 it is defeated Outlet is through inductance L1 through meeting capacitance C2, while inductance L1 connects the collector of brilliant lock body pipe Q001, the emitter of brilliant lock body pipe Q001 The collector of transistor Q002, while the collector of brilliant lock body pipe Q001 is through capacitance C001 sending and receiving emitter-base bandgap gradings, brilliant lock body pipe Q001's Base stage the both ends parallel diode D001 through resistance R001 connecting resistance R003, resistance R003, resistance R003 connect IGBT drive circuit, The emitter ground connection of brilliant lock body pipe Q002, the collector of brilliant lock body pipe Q002 is through capacitance C002 sending and receiving emitter-base bandgap gradings, brilliant lock body pipe Q002 Base stage through resistance R02 sending and receiving emitter-base bandgap gradings, while the base stage of brilliant lock body pipe Q002 is through resistance R01 connecting resistance R03, resistance R03 both ends Parallel diode D002, resistance R03 and resistance R003 connect IGBT drive circuit, and the collector of transistor Q002 is through transformer T401 Load detecting circuit is connect, the emitter of another input termination transistor Q1 of transformer T401, the collector of collective pipe Q1 is through electricity Sense L101 meets capacitance C101, and the base stage of transistor Q1 connects IGBT drive circuit through resistance R101, and the base stage of transistor Q1 is through resistance R102 sending and receiving emitter-base bandgap gradings, while transformer T401 connects the collector of transistor Q3, the base stage of transistor Q3 meets IGBT through resistance R301 Drive circuit, while the base stage of transistor Q3 connects electricity through resistance R302 sending and receiving emitter-base bandgap gradings, the emitter of transistor Q3 through capacitance C301 Feel L301, transformer T401 connects the emitter of transistor Q2, and the base stage of transistor Q2 connects IGBT drive circuit through resistance R201, brilliant The base stage of body pipe Q2 connects capacitance C201, transformer through resistance R202 sending and receiving emitter-base bandgap gradings, the collector of transistor Q2 through inductance L201 Collectors of the T401 through transistor Q4, the base stage of transistor Q4 connect IGBT drive circuit, the base stage of transistor Q4 through resistance R401 Through resistance R402 sending and receiving emitter-base bandgap gradings, the emitter of transistor Q4 meets inductance L401 through capacitance C401, and capacitance C101 and C201 connect at the same time Capacitance C2, inductance L301 and L401 ground connection.

On the basis of above-mentioned technical proposal, 1.5V power supplys connect the collector of transistor Q604 in the IGBT drive circuit, 1.5V power supplys meet diode D604 through diode D603 at the same time, and diode D604 ground connection, the emitter of transistor Q604 is through resistance R607 connects the emitter of transistor Q605, and the base stage of transistor Q605 connects the base stage of transistor Q604, the transmitting of transistor Q605 Pole connects the base stage of transistor in heater circuit through resistance R608, while resistance R608 is grounded through resistance R609, transistor Q605's Emitter connects the collector that diode D604,1.5V power supply meets transistor Q603 through resistance R606, the emitter of transistor Q603 Ground connection, the base stage of transistor Q603 are grounded through capacitance C603, and 1.5V power supplys connect crystalline substance through resistance R603 connecting resistance R604, resistance R604 The base stage of body pipe Q603, resistance R603 meet the collector of transistor Q602, the emitter ground connection of transistor Q602, transistor Q602 Base stage is grounded through resistance R605, and capacitance C601 connects the collector of transistor Q601, the emitter ground connection of transistor Q601, while crystalline substance The collector of body pipe Q601 is grounded through resistance R601, and capacitance C601 connects diode D602, while diode through diode D601 D601 connects the base stage of transistor Q602, and diode D602 is grounded through resistance R602, and diode D602 connects master control core through capacitance C602 Piece.

On the basis of above-mentioned technical proposal, 5V power supplys meet diode D502 through resistance R509 in the load detecting circuit, Resistance R509 meets circuit input end IN10 through capacitance C505, while resistance R509 connects circuit output end OUT, 5V power supply respectively through two Pole pipe D501 and resistance R510 meets circuit input end IN10, and diode D502 is received through resistance R516 and surveyed load, diode D502 5V power supplys are connect through resistance R515.

The electromagnetic heater of the utility model design is heated, together as needed by setting multigroup heating coil Time-division master bears heating coil, and main heating coil power consumption is high, and negative heating coil is low in energy consumption, and carrying out heating as needed effectively reduces work( Consumption, is driven by IGBT drive circuit, and control is accurate, stable, greatly improves the work efficiency of staff.

Brief description of the drawings

Fig. 1 is heater circuit figure.

Fig. 2 is IGBT drive circuit figure.

Fig. 3 is load detecting circuit figure.

Embodiment

The utility model is further elaborated with specific embodiment below in conjunction with the accompanying drawings.

A kind of electromagnetic heater, heater circuit built in electromagnetic heater, alternating current connects pressure through fuse FOO1 in circuit Quick resistance ZNR, varistor ZNR both ends shunt capacitance C1, capacitance C1 connect the input terminal of rectifier bridge D401, rectifier bridge 401 it is defeated Outlet is through inductance L1 through meeting capacitance C2, while inductance L1 connects the collector of brilliant lock body pipe Q001, the emitter of brilliant lock body pipe Q001 The collector of transistor Q002, while the collector of brilliant lock body pipe Q001 is through capacitance C001 sending and receiving emitter-base bandgap gradings, brilliant lock body pipe Q001's Base stage the both ends parallel diode D001 through resistance R001 connecting resistance R003, resistance R003, resistance R003 connect IGBT drive circuit, The emitter ground connection of brilliant lock body pipe Q002, the collector of brilliant lock body pipe Q002 is through capacitance C002 sending and receiving emitter-base bandgap gradings, brilliant lock body pipe Q002 Base stage through resistance R02 sending and receiving emitter-base bandgap gradings, while the base stage of brilliant lock body pipe Q002 is through resistance R01 connecting resistance R03, resistance R03 both ends Parallel diode D002, resistance R03 and resistance R003 connect IGBT drive circuit, and the collector of transistor Q002 is through transformer T401 Load detecting circuit is connect, the emitter of another input termination transistor Q1 of transformer T401, the collector of collective pipe Q1 is through electricity Sense L101 meets capacitance C101, and the base stage of transistor Q1 connects IGBT drive circuit through resistance R101, and the base stage of transistor Q1 is through resistance R102 sending and receiving emitter-base bandgap gradings, while transformer T401 connects the collector of transistor Q3, the base stage of transistor Q3 meets IGBT through resistance R301 Drive circuit, while the base stage of transistor Q3 connects electricity through resistance R302 sending and receiving emitter-base bandgap gradings, the emitter of transistor Q3 through capacitance C301 Feel L301, transformer T401 connects the emitter of transistor Q2, and the base stage of transistor Q2 connects IGBT drive circuit through resistance R201, brilliant The base stage of body pipe Q2 connects capacitance C201, transformer through resistance R202 sending and receiving emitter-base bandgap gradings, the collector of transistor Q2 through inductance L201 Collectors of the T401 through transistor Q4, the base stage of transistor Q4 connect IGBT drive circuit, the base stage of transistor Q4 through resistance R401 Through resistance R402 sending and receiving emitter-base bandgap gradings, the emitter of transistor Q4 meets inductance L401 through capacitance C401, and capacitance C101 and C201 connect at the same time Capacitance C2, inductance L301 and L401 ground connection.

1.5V power supplys connect the collector of transistor Q604 in the IGBT drive circuit, while 1.5V power supplys are through diode D603 meets diode D604, diode D604 ground connection, and the emitter of transistor Q604 connects the hair of transistor Q605 through resistance R607 Emitter-base bandgap grading, the base stage of transistor Q605 connect the base stage of transistor Q604, and the emitter of transistor Q605 connects heating electricity through resistance R608 The base stage of transistor in road, while resistance R608 is grounded through resistance R609, the emitter of transistor Q605 meets diode D604, 1.5V power supplys connect the collector of transistor Q603, the emitter ground connection of transistor Q603, the base of transistor Q603 through resistance R606 Pole is grounded through capacitance C603, and 1.5V power supplys connect the base stage of transistor Q603, resistance through resistance R603 connecting resistance R604, resistance R604 R603 connects the collector of transistor Q602, the emitter ground connection of transistor Q602, and transistor Q602 base stages are grounded through resistance R605, Capacitance C601 connects the collector of transistor Q601, the emitter ground connection of transistor Q601, while the collector warp of transistor Q601 Resistance R601 is grounded, and capacitance C601 meets diode D602 through diode D601, while diode D601 connects the base of transistor Q602 Pole, diode D602 are grounded through resistance R602, and diode D602 connects main control chip through capacitance C602.

5V power supplys meet diode D502 through resistance R509 in the load detecting circuit, and resistance R509 connects electricity through capacitance C505 Road input terminal IN10, while resistance R509 connects circuit output end OUT, 5V power supply and connects electricity through diode D501 and resistance R510 respectively Road input terminal IN10, diode D502 are received through resistance R516 and are surveyed load, and diode D502 connects 5V power supplys through resistance R515.

Alternating current 220V/50Hz is accessed by L, N-port, and pulsating dc voltage is obtained at capacitance C2 ends by EMI networks. In a cycle of resonance, power supply is regarded as constant.The external IGBT drivings electricity of two main switch Q001, Q002 Road.C001, C002 are the Absorption Capacitance of two main switches, are shielded.The equally external IGBT drive circuits of four auxiliary switch, Depend on whether this road has suitable load whether it is opened, load detecting is by a current transformer external load detection electricity Road judges.6 IGBT layouts consider the installation of heat sink, and two, the left side is larger for main switching power loss, distant； Four, the right IGBT is auxiliary switch, and power consumption is relatively low, apart from relative close.There is 8, four tunnel external terminal to use below four auxiliary switch In external 4 inductance coils.

IGBT drive circuit drives IGBT quickly to lead using the plug-type output of NPN type C1008 and positive-negative-positive A708 matched pair transistors Logical and cut-off.The power electricity of the certain duty cycle of voltage comparator output terminal OUT13 outputs of circuit is adjusted from power P WM ripples Mean longitude capacitance C601, diode D601 and resistance R605 are coupled to the base stage of triode Q602.When OUT13 is high level, Q602 is turned on, Q603 cut-offs, Q604 conductings, and+15V supplies the grid of IGBT, this is the one side pushed away.When OUT13 is low electricity Usually, Q602 ends, Q603 conductings, Q605 conductings, IGBT grounded-grids, this is the one side drawn.Made using plug-type driving With there is two：First, reduce IGBT switching losses；Second, can separately adjustable ON time and deadline.

Load detecting circuit powers on, and after pressing start key, main control chip Single port sends 6 ~ 10us high level Narrow pulse signal, which adds to IGBT drive circuit, and IGBT turns on 6 ~ 10u under the drive signal, is then powered off.Shut-off Afterwards, resonance occurs for coil panel L and resonant capacitance C.The synchronized circuit of IGBT collector resonance potential signals obtains what is synchronized Square wave is believed.Then, this synchronous square wave is transported to I/O mouthfuls of main control chip load detecting and is detected.Loaded if suitable, The square wave number that main control chip detects in the time range of setting meets standard, is determined with pot.Then an inspection pot arteries and veins is retransmited Rush signal and carried out pot judgement, one second twice.If continuously judging there is pot three times, system is determined as there is pot, main control chip Start to send PWM ripples, system enters working status.If without suitably loading, main control chip detects in the range of setting Square wave number it is sub-standard, be judged as no pot, continuous detection 30 times, if being judged as no pot, system is determined as no pot, Shutdown.

The above is the utility model preferred embodiment, for the ordinary skill in the art, according to this reality With new teaching, in the case where not departing from the principle of the utility model with spirit, the change that is carried out to embodiment, repair Change, replace and modification is still fallen within the scope of protection of the utility model.

Claims (3)

1. a kind of electromagnetic heater, it is characterised in that heater circuit built in electromagnetic heater, alternating current is through fuse in circuit FOO1 meets varistor ZNR, and varistor ZNR both ends shunt capacitance C1, capacitance C1 connect the input terminal of rectifier bridge D401, rectifier bridge 401 output terminal is through inductance L1 through meeting capacitance C2, while inductance L1 connects the collector of brilliant lock body pipe Q001, brilliant lock body pipe Q001's The collector of emitter transistor Q002, while the collector of brilliant lock body pipe Q001 is through capacitance C001 sending and receiving emitter-base bandgap gradings, brilliant lock body pipe The base stage of Q001 the both ends parallel diode D001 through resistance R001 connecting resistance R003, resistance R003, resistance R003 connect IGBT drives Dynamic circuit, the emitter ground connection of brilliant lock body pipe Q002, the collector of brilliant lock body pipe Q002 is through capacitance C002 sending and receiving emitter-base bandgap gradings, brilliant lock body The base stage of pipe Q002 is through resistance R02 sending and receiving emitter-base bandgap gradings, while the base stage of brilliant lock body pipe Q002 is through resistance R01 connecting resistance R03, resistance R03 both ends parallel diode D002, resistance R03 and resistance R003 connect IGBT drive circuit, and the collector of transistor Q002 is through becoming Depressor T401 connects load detecting circuit, the emitter of another input termination transistor Q1 of transformer T401, the collection of collective pipe Q1 Electrode meets capacitance C101 through inductance L101, and the base stage of transistor Q1 connects IGBT drive circuit, the base of transistor Q1 through resistance R101 Pole is through resistance R102 sending and receiving emitter-base bandgap gradings, while transformer T401 connects the collector of transistor Q3, and the base stage of transistor Q3 is through resistance R301 connects IGBT drive circuit, while the base stage of transistor Q3, through resistance R302 sending and receiving emitter-base bandgap gradings, the emitter of transistor Q3 is through electricity Hold C301 and meet inductance L301, transformer T401 connects the emitter of transistor Q2, and the base stage of transistor Q2 meets IGBT through resistance R201 Drive circuit, the base stage of transistor Q2 connect capacitance through resistance R202 sending and receiving emitter-base bandgap gradings, the collector of transistor Q2 through inductance L201 The collector of C201, transformer T401 through transistor Q4, the base stage of transistor Q4 connect IGBT drive circuit, crystal through resistance R401 For the base stage of pipe Q4 through resistance R402 sending and receiving emitter-base bandgap gradings, the emitter of transistor Q4 meets inductance L401 through capacitance C401, capacitance C101 and C201 connects capacitance C2, inductance L301 and L401 ground connection at the same time.

A kind of 2. electromagnetic heater according to claim 1, it is characterised in that 1.5V in the IGBT drive circuit Power supply connects the collector of transistor Q604, while 1.5V power supplys meet diode D604 through diode D603, and diode D604 is grounded, The emitter of transistor Q604 connects the emitter of transistor Q605 through resistance R607, and the base stage of transistor Q605 meets transistor Q604 Base stage, the emitter of transistor Q605 connects the base stage of transistor in heater circuit through resistance R608, while resistance R608 is through electricity R609 ground connection is hindered, the emitter of transistor Q605 connects the collection that diode D604,1.5V power supply meets transistor Q603 through resistance R606 Electrode, the emitter ground connection of transistor Q603, the base stage of transistor Q603 are grounded through capacitance C603, and 1.5V power supplys are through resistance R603 Connecting resistance R604, resistance R604 connect the base stage of transistor Q603, and resistance R603 meets the collector of transistor Q602, transistor Q602 Emitter ground connection, transistor Q602 base stages are grounded through resistance R605, and capacitance C601 connects the collector of transistor Q601, transistor The emitter ground connection of Q601, while the collector of transistor Q601 is grounded through resistance R601, capacitance C601 connects through diode D601 Diode D602, while diode D601 connects the base stage of transistor Q602, diode D602 is grounded through resistance R602, diode D602 connects main control chip through capacitance C602.

A kind of 3. electromagnetic heater according to claim 1, it is characterised in that 5V electricity in the load detecting circuit Source meets diode D502 through resistance R509, and resistance R509 meets circuit input end IN10 through capacitance C505, while resistance R509 connects electricity Road output terminal OUT, 5V power supplys meet circuit input end IN10 through diode D501 and resistance R510 respectively, and diode D502 is through resistance Load is surveyed in R516 reception, and diode D502 connects 5V power supplys through resistance R515.