WO2009117929A1 - 感应加热电源电路 - Google Patents

感应加热电源电路 Download PDF

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Publication number
WO2009117929A1
WO2009117929A1 PCT/CN2009/070878 CN2009070878W WO2009117929A1 WO 2009117929 A1 WO2009117929 A1 WO 2009117929A1 CN 2009070878 W CN2009070878 W CN 2009070878W WO 2009117929 A1 WO2009117929 A1 WO 2009117929A1
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WO
WIPO (PCT)
Prior art keywords
pin
resistor
capacitor
grounded
power supply
Prior art date
Application number
PCT/CN2009/070878
Other languages
English (en)
French (fr)
Inventor
俞正国
Original Assignee
Yu Zhengguo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CNA2008100707924A external-priority patent/CN101247680A/zh
Priority claimed from CNU2008201017156U external-priority patent/CN201194433Y/zh
Application filed by Yu Zhengguo filed Critical Yu Zhengguo
Publication of WO2009117929A1 publication Critical patent/WO2009117929A1/zh

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/04Sources of current
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/06Control, e.g. of temperature, of power

Definitions

  • the invention relates to an electrical product, in particular to an induction heating power supply circuit.
  • the traditional heating power supply adopts the resistance wire heating method, and its thermal efficiency is very low.
  • This heating method mainly relies on contact conduction to transfer thermal energy.
  • Various heating plates or heating coils made of electric resistance wires have only one surface contact to be heated.
  • the part of the part causes a large part of the heat energy to be dissipated in the air, which not only causes energy loss, but also directly causes contact with the object to be heated due to the resistance type, which may cause electric leakage and death, because the resistance wire heating itself will generate heat, not only It is easy to damage and has high maintenance costs, and may cause fires and cause unnecessary economic losses.
  • an induction heating power supply circuit composed of a main control part and a power part, wherein: the main control part has a switching power supply and a driving part, an oscillation excitation part, a phase and a voltage
  • the power part is composed of a core part composed of a full-bridge power tube and a sensor.
  • the AC 220V is connected to both ends of the capacitor C11 and the common mode inductor T l through the R12 and the resistor RU.
  • the other ends of the common mode inductor T1 are connected to the two ends of the capacitor C12, and then connected to the rectifier bridge B, and the rectifier bridge.
  • the positive pole of B is connected to the positive pole of electrolytic capacitor C4, the negative pole of rectifier bridge B is connected to the negative pole of electrolytic capacitor C4 to the ground, the resistor R3 is connected to both ends of electrolytic capacitor C4, capacitor C5, resistor R3 and Zener diode D5
  • One end is connected to the primary winding of the transformer T2
  • the other end is connected to the diode D4
  • the other end of the diode D4 is connected to the other end of the primary winding of the transformer T2 to the 3rd leg of the switching tube U1, and the DC of the switching transformer T1
  • One end of the winding is connected to the diode D6, one end of the diode D6 is connected to the positive pole of the electrolytic capacitor C7, and the other end of the DC secondary winding of the switching transformer is DC cold ground, after the diode D6, the capacitor C7, the inductor L2, the electrolytic capacitor C8, the DC The voltage is connected in series with R16 through resistor R15.
  • L1 is connected to the anode of the electrolytic capacitor C2, one end of Cl, R1, the other end of the winding of the transformer is connected to the cathode of C2, the other end of C1 and R1, and one end of the secondary winding II is connected to the diode D12.
  • One end, the other end of D12 is connected to one end of the inductor L12, the other end of the L12 is connected to the positive pole of the electrolytic capacitor C22, one end of C32, R32, and the other end of the winding of the transformer is connected with the negative end of C22, the other end of C32 and R32,
  • One end of the secondary winding I II is connected to one end of the diode D13, the other end of the D13 is connected to one end of the inductor L13, and the other end of the L31 is connected to the positive pole of the electrolytic capacitor C32, one end of C23, R33, and the other end of the winding of the transformer and C32
  • the negative pole, the other ends of C23 and R33 are connected, one end of the secondary winding IV is connected to one end of the diode D14, the other end of the D14 is connected to one end of the inductor L14, and the other end of the L14 is connected to the positive pole of the electrolytic capacitor C34, C
  • the negative pole of electrolytic capacitor C16 and the end of R18 are connected to the negative terminal of C12, that is, the cold ground of the winding. Terminal, output 4 groups of DC voltage, four sets of voltage through the integrated block U4 and resistors R17, R18, diode D9 external voltage regulator circuit, the four groups of voltage voltage, four sets of drive pulses generated by the oscillator circuit, After the IGBT exclusive drive chip U3, four sets of drives are output, which are respectively connected to the drive 1, drive 2, drive 3, and drive 4 of the power board.
  • the oscillation excitation part consists of the integrated block IC E, resistors R83, R64, R105, capacitor C40, and the integrated block IC E is the 20-pin control chip.
  • the 16 and 10 pins of the integrated block IC E are the power input terminals, and the IC E 20-pin grounding.
  • IC E's 19-pin capacitor C40 has one end, the other end is grounded, IC E's 18-pin connection, R105, R64, R83's one end, R105's other end is grounded, and the other ends of R64 and R83 are connected, then the optocoupler is connected.
  • U2's 3 feet, U2's 4 feet are grounded, IC E's 17th pin is connected to R109, R109 is connected to the other end, IC E's 15 pin is connected to R106, 106 is the other end is grounded, IC E's 9-pin is connected to resistor R124, R124 is another One end is connected to the positive pole of the power supply part output 5, the positive pole of the electrolytic capacitor C46 is connected to the positive pole of the power supply part output 5, the negative pole of the C46 is grounded, the fourth leg of the IC E is connected to the capacitor C29, and the other end of the C29 is connected to the ground, the IC foot 5 feet Connected to resistor R108, the other end of R108 is connected to ground, IC 3 has pin 3 connected to resistor R100, the other end of R100 is connected to ground, diode D5 is connected to pin 2 of IC E, and the other end is connected.
  • Resistor R37 is connected, the other end of R37 is connected to ground, IC E 7, 8, 12, 13 pin output four sets of drive waveforms, IC E's 7 pin is connected with IC A's 3 pin, IC E's 12 pin is connected with resistor R113, and the other end of R113 is connected with IC J's 1 pin.
  • IC 6's 6 pin is connected to U5's 3 pin, U5's 2, 4 pin is grounded, U5's 1 pin is connected with the connection point of D6 and R46.
  • This part is composed of integrated block IC A, resistor R2, capacitor Cl, C7, C12, one end of resistor block IC 118 is connected to one end of resistor block R118, and the other end of resistor R118 is connected to pin 1 of integrated block IC J, IC J 2.
  • the 3 pin is connected to one end of the capacitor C11.
  • the capacitor C11 is connected to one end of the resistor R49 and the potentiometer R103.
  • the resistor R49 and the potentiometer R103 are respectively connected to the 4 and 5 pins of the IC J, and the 6 pin of the IC J is connected to the 9 Feet, 8 feet, 11 feet are connected, 10 feet are connected to IC F's 3 feet, IC J's 1, 2 are connected to DC power supply, 7 feet are grounded; Adjust potentiometer R103, integrated block IC E 7-pin capacitor C12 Connected, the other end of the capacitor C12 is connected to pin 13 of IC A, the output voltage U is connected to one input of the 3-pin phase comparator of the integrated block IC A, and the pin 8 of the integrated block IC E is locked; wherein the 16 pin of IC A Connect the power supply, pin 9 is connected to capacitor Cl and resistor R2, the other end of the resistor is connected to one end of capacitor C7, the other end of capacitor C7 is grounded, and the other legs of IC A are suspended.
  • This part consists of the sensor, IC block F, resistors R98, R17, R13, R14, R75, R107, R18, capacitors C42, C16, and integrated block IC B.
  • IC F is a 16-pin phase voltage comparator. Its 1 pin is connected to one end of resistor R17. R17 and R98 are connected in series to ground. The 5th and 8th pins are grounded. The capacitors C42, 13 and 9 are connected in series between pins 6 and 7. The resistor R13 is connected in series, and the 10, 11, and 12 pins are respectively connected to one ends of the resistors R107, R75, and R14, and the other ends of the R107, R75, and R14 are grounded, and the 14th pin of the IC F is connected to the sampling circuit of the sensor.
  • IC 2's 1 and 2 pins are connected to one end of resistor R5, the other end of R5 is connected to R3, the other end of R3 is connected to one end of R8, R9, C21, and the other end of capacitor C21 is grounded;
  • IC B's 3 pin and Resistor R10 is connected, the other end of resistor R10 is connected to pin 9 of IC A;
  • IC B is connected to DC power supply, DC is connected to one end of R11, the other end of R11 is connected to 5 pin, and one end of capacitor C20 is connected to 5 pin of IC B, The other end is grounded.
  • the resistor R12 is connected in series with the capacitor C39, the other end of the resistor R12 is connected to the pins 6 and 7 of the IC B, the other end of the capacitor C39 is grounded, the capacitor C36 is connected in series with the resistor R4, and the other end of the resistor R4 is connected to the IC B. 14 feet, the other end of the capacitor C36 is grounded; the resistor R6 is connected in series between the 13 and 14 pins of the IC B, the 12-pin of the IC B is connected to one end of the resistor R7, the other end of the R7 is connected to the end of the capacitor C19, R18, and the capacitor The other end of C19 is grounded, and the other end of resistor R8 is coupled to R9.
  • This part consists of sensor, integrated block IC F, resistors R98, R17, R13, R14, R75, R107, R18, capacitors C42, C16, integrated block IC K
  • IC F is a 16-pin phase voltage comparator, 1 pin Connect one end of resistor R17, R17 and R98 are connected in series with ground, 5 and 8 feet are grounded, and capacitor C42 is connected in series between pins 6 and 7. Pins 13 and 9 are connected in series with resistor R13, and 10, 11, and 12 pins are respectively connected. One end of resistors R107, R75, and R14, and the other ends of R107, R75, and R14 are grounded, and pin 14 of IC F is connected to the sampling circuit of the sensor.
  • IC 2's 1 and 2 pins are connected to one end of resistor R5, the other end of R5 is connected to R3, the other end of R3 is connected to one end of R8, R9, C21, and the other end of capacitor C21 is grounded; IC B's 3 pin and Resistor R10 connection, resistor The other end of the RIO is connected to the 9th pin of the IC A; the IC B is connected to the DC power supply, the DC is connected to the R1, and the other end of the R11 is connected to the 5 pin.
  • One end of the capacitor C20 is connected to the 5 pin of the IC B, and the other end is grounded.
  • resistor R12 is connected in series with capacitor C39, the other end of resistor R12 is connected to pins 6 and 7 of IC B, the other end of capacitor C39 is grounded, capacitor C36 is connected in series with resistor R4, and the other end of resistor R4 is connected to pin 14 of IC B.
  • the other end of C36 is grounded; resistor R6 is connected in series between pins 13 and 14 of IC B, one end of IC B is connected to one end of resistor R7, the other end of R7 is connected to one end of capacitors C19 and R18, and the other end of capacitor C19 is grounded.
  • the other end of the resistor R8 is coupled to R9.
  • IC K's 1 and 2 pins are connected to resistor R114.
  • the other end of R114 is connected to capacitor C23 and resistor R76.
  • the other end of capacitor C23 is grounded.
  • IC K pin 3 is connected to resistor R68.
  • the other end of R68 is connected to capacitor.
  • the resistor R72 is connected, the other end of the capacitor C6 is grounded, the other end of the R72 is connected to the capacitor C32 to the pin 10 of the IC F, the other end of the capacitor C32 is grounded, the pin 4 of the IC K is the power input end, and the 5 pin is R72 is connected, the other end of R72 is connected to capacitor C33 and IC E pin 2, the other end of capacitor C33 is grounded; IC K 6, 7 pin, resistor R125, capacitor C35 are connected, and resistor R125 is connected with resistor R80.
  • R80 is connected to one end of capacitor C34, the other end of C34 is grounded, pin 8 of IC K is connected to resistors R22 and R23, and the other end of R22 is connected to diode D8.
  • the other end of D8 is connected to resistor R26, resistor R81 and IC I. 11 feet, the other end of R13 is connected to the LED, the other end of the LED is grounded, IC K's 9-pin is connected to resistor R70, the other end of 10 is connected with capacitor C47 and resistor R69, the other end of capacitor C47 is grounded, and the other end of R69 is Capacitor C37 and resistor R45 are connected to IC K 1 2 pin, resistor R45 is connected to the other end of capacitor C37.
  • IC pin 11 is grounded
  • IC K pin 14 is connected to diode D7, and D7 is connected to resistor R81 and diode D8.
  • This part consists of integrated blocks IC D, IC G, IC H, IC I, Ul and sensors.
  • the sampling circuit is connected to J4, one end of J4 is grounded, the other end is connected to diode D10, and the other end of D10 is connected to the positive electrode of electrolytic capacitor C10.
  • One end of capacitor C27 and potentiometer R115, the other end of capacitor C10, C27 and potentiometer R115 is grounded, the midpoint of potentiometer is connected with pin 1 of U1, the pin 2 of U1 is grounded, the pin 3 of U1 is connected, 4 pin Connect resistor R92 and connect to pin 8 of IC D; R60 and R28 are connected in series and connected to pin 1 and pin 14 of IC K.
  • R93 and R29 are connected in series and then connected between pin 2 and pin 13.
  • R59 and R88 are connected in series.
  • pin 2 and 4 of IC D pin 5 of IC D, connect one end of R27, connect the other end of R27 to R89 and C3, connect the other end of C3 to ground, and connect the other end of R89 to the junction of R86 and R34.
  • the 6 pin of IC D is connected with diodes D1, D2, capacitor C15, and resistor R52. The other end of capacitor C15 and resistor R52 is grounded. The two ends of diodes D1 and D2 are connected to the sensor.
  • R56 and the 9 pin of IC Connected, the other end is connected to the junction of capacitor C10, resistor R84, R85
  • One end of the R58 is connected to the 11th pin of the IC, and the other end is connected to the connection point of the capacitor Cl l , the resistors R86 and R34 , and the 12 pin of the IC D is grounded.
  • Resistor R43 is connected to pin 1 of IC G, the other end is connected to pin 2 of IC I, resistor R44 is terminated to pin 2 of IC G, and the other end is connected to pin 4 of IC H.
  • Pin 3 of IC G is connected to capacitor C22 and R35 connection point, capacitor C22 accepts power supply, R35 is grounded, IC G's 4 pin is grounded, IC G's 5 pin is power input terminal, IC G 6 pin, resistor R97, resistor R97 is grounded at the other end, IC G 7 pin capacitor C26 and The junction of resistor R36, the other end of the resistor is grounded, the other end of the capacitor is connected to the power supply, the 8 pin of IC G is grounded, the resistor R40 is terminated with 9 pins of IC G, and the other end is connected to pin 3 of IC H, and the resistor R39 is terminated.
  • IC 2's 2 pin is connected to IC I's 10, IC H's 5 and 7 are grounded, IC H's 6 and 8 are connected, resistors R41 and R61 are connected to IC H's 8 pin, and the other end of resistor R41 Grounding, the other end of the resistor R61 is connected to the capacitor C24, the other end of the capacitor C24 is grounded; the 10 and 12 phases of the IC H are connected, the pins 11 and 13 of the IC H are connected, and the 14 pin of the IC H is the input end of the power supply; I, 7 and 8 are grounded, 9 and 13 are connected, and 14 is the input of the power supply.
  • This part is composed of integrated blocks IC C, IC G, IC H, IC I and sensor current samples.
  • the current sampling coil of the sensor is connected to J1 and 2, and is connected to the end of potentiometer R102, R102 3
  • the end of the R102 is connected to the junction of the resistor R51 and the capacitor C13, the other end of the C13 is grounded, the R51 is connected to the 4 pin of the IC C, the resistor R54 is connected to the 5 pin of the IC C, and the other end is connected.
  • resistors R55 and R82 At the junction of resistors R55 and R82, the other end of R55 is connected to the power supply, the other end of R82 is grounded to the 'pin 3' power input terminal of IC C, one end of resistor R48 is connected to pin 2 of IC C, and the other end is connected to IC C. 4 feet, IC C's 2 pin is connected with the connection point of resistor R25, R26 and capacitor C8, the other end of R25 is connected to the power supply, and the other end of the resistor R26 and capacitor C8 is grounded.
  • the soft start part is composed of IC E internal integration and external capacitor C45.
  • the positive pole of C45 is connected with 6 pin of IC E, and the negative pole of C45 is grounded.
  • the temperature protection consists of temperature control switch J3, integrated block IC G, IC H, IC I.
  • the temperature control switch J3 is terminated with power supply, and the other end is connected to diode D9.
  • the other end of D9 is connected with the connection point of resistor R81 and diode D8.
  • the core part is composed of the full bridge of the power tube IGBT, the three-phase electric A, B, C is connected to the rectifier bridge of the input end of the three-phase full bridge D, the positive pole of the rectifier bridge is connected with one end of the reactor, and the other end of the reactor is connected in series
  • the filter capacitors C1 and C2, C3 and C4, C5 and C6 are connected to the positive pole, and the cathodes of C2, C4 and C6 are connected to the negative pole of the rectifier bridge.
  • the E pole of the tube Q1 and the Q pole of Q2, the E pole of Q3 and the Q pole of Q4 are connected in series to the Q poles of Q1 and Q3 and the E poles of Q2 and Q4, respectively, and the positive poles and the negative poles of the three-phase rectifier bridge are respectively connected.
  • One end of the load is connected to the E pole of Q1
  • the other end is connected to the sensor
  • the other end of the sensor is connected to the E pole of Q3.
  • the sensor integrates current sampling, current phase sampling, and voltage sampling circuitry.
  • the reactor is an inductor with reactive power compensation.
  • the sample is a sampling coil.
  • the heating power supply circuit of the invention adopts a three-phase four-wire input mode, and after rectification, reactive power compensation and harmonic processing are performed by the reactor, thereby improving the power factor, greatly reducing the reactive power, and then performing capacitance filtering.
  • the core part is composed of high-power IGBT full bridge.
  • the control part of the invention adopts four sets of driving, so that the high-power power tube is kept in the zero voltage switching state, the loss is minimum, the safety area is large, and the working efficiency is further improved; and the phase synchronization automatic is completed by the phase-locked loop through the sensor Control, automatically track the natural frequency of the metal conductor and its parameter changes, the control part through the sensor to the load current sampling, current phase clamping, voltage sampling, phase sampling, temperature sampling, and a combination of various protection circuits, so that The heating power supply works in a safe and efficient manner, thus avoiding various safety hazards existing in the conventional resistance wire heating mode.
  • the product of the invention can be widely applied to blown film machines for plastics, wire drawing machines, injection molding machines, granulators, rubber extruders, vulcanizers, cable extruders, oil heating, and bathhouses in daily life. Heating and other aspects.
  • the beneficial effects of the present invention are: Since the present invention adopts the LC series resonance mode, when operating, the power output portion inverts the DC voltage into a super-audio alternating magnetic field of 25 kHz.
  • the magnetic lines of force generated by the super-audio alternating magnetic field are applied to the heated object made of the metal material by the insulating material after the insulating material is insulated.
  • the metal object generates eddy current inside the metal after sensing the super-audio alternating magnetic field, and the heat is raised, thereby heat-treating the metal conductor, and the heat loss is small, replacing the conventional heating method of the resistance wire. Therefore, the product load coil of the present invention does not generate heat itself, and the coil does not pose a safety hazard due to its own heat.
  • the invention integrates various protection circuits, and the life of the product is longer; the load heat-treats the metal conductor by electromagnetic induction, the heat loss is small, the heating effect is good; the working frequency is set to a super-audio range of about 25KHz, Noise generated in the production environment will not affect the human body; the insulation system will be used to further improve the utilization of thermal energy and further save energy.
  • FIG. 1 is a block diagram of the present invention.
  • 2 is a circuit diagram of a switching power supply circuit of the present invention.
  • 1 is output 1
  • 2 is output 2
  • 3 is output 3
  • 4 is output 4
  • 5 is output 5, wherein output 1, output 2, output 3, and output 4 output 25 VDC voltage, and output 5 outputs 12 VDC voltage.
  • FIG. 3 is a view of a power board IGBT driving circuit of the present invention.
  • 6 is the drive pulse
  • 7 is the power board IGBT drive.
  • FIG. 4 is a circuit diagram of a power board of the present invention.
  • A, B, and C are three-phase lines; 8 is a reactor, 9 is a load output, 10 is a sensor, 11 is a drive 1, 12 is a drive 2, 13 is driven 3, and 14 is a drive 4.
  • Fig. 5 is a circuit diagram of the main control part of the heating power supply of the present invention.
  • IC A and F are phase voltage comparators
  • IC B, C, D, K are comparators
  • IC ⁇ is PWM controller
  • IC G is RS flip flop
  • IC H is RS flip flop
  • I is XOR gate
  • IC J is Non-door.
  • this embodiment is composed of a main control circuit portion and a power circuit portion.
  • the mains AC 220V is connected to the two ends of the capacitor C11 and the common mode inductor T1 through the temperature fuse R12 and the negative temperature coefficient thermistor Rl l , and the other ends of the common mode inductor are connected to the two ends of the capacitor C12. After common mode interference and differential mode interference, it is connected to the AC input terminal of rectifier bridge B for rectification.
  • the rectifier bridge output + is connected with the '+' of electrolytic capacitor C4, and the '-' of rectifier bridge B and the electrolytic capacitor C4'- 'Coupling to the thermal ground for filtering, the resistor R3 is connected to both ends of the electrolytic capacitor C4, the capacitor C5, the resistor R3 is connected to one end of the Zener diode D5 to the primary winding of the transformer T2, and the other end is coupled to Diode D4, the other end of diode D4 is connected to the other end of the primary winding of transformer T2, connected to pin 3 of switch U1, one end of 12V DC secondary winding of switching transformer T1 is connected to diode D6, and one end of diode D6 is connected to electrolytic capacitor C7 '+', the other end of the 12V DC secondary winding of the switching transformer is 12V DC cold ground, rectified by diode D6, capacitor C7, inductor L2, electrolytic capacitor C8 filtered, output 12V DC voltage, 12V DC voltage through the resistor R15
  • One end of the feedback winding is connected to the hot ground and the other end is connected to the diode D2.
  • the other end of D2 is connected to pin 3 of U2, pin 4 of U2, connected to '+ of electrolytic capacitor C15, and one end of capacitor C9, connected to pin 2 of switch U1, '-' of electrolytic capacitor C15
  • resistor R9 the other ends of R9 and C9 are connected to the hot ground, and the other four sets of secondary outputs are only one of them.
  • One end of one set of secondary windings is connected to one end of diode D1, and the other end of D1 is connected.
  • One end of the inductor L1, the other end of the L1 is connected to one end of the '+', Cl, R1 of the electrolytic capacitor C2, and the other end of the winding of the transformer is connected to the negative pole of C2, the other end of C1 and R1, and the secondary winding II
  • One end is connected, one end of the secondary winding III is connected to one end of the diode D13, the other end of the D13 is connected to one end of the inductor L13, and the other end of the L31 is connected to the positive pole of the electrolytic capacitor C32, one end of C23, R33, and the other of the winding of the transformer
  • One end is connected to the negative end of C32, the other end of C23 and R33
  • one end of the secondary winding IV is connected to one end of the diode D14
  • the other end of the D14 is connected to one end of the inductor L14
  • the other end of the L14 is connected to the positive pole of the electrolytic capacitor C34, C24
  • One end of R34, the other end of the winding of the transformer is connected with the negative end of C34, the other end of C24 and R34, and then connected to the '+' of electrolytic capacitor C3 and the 1-pin input of U4, and the 3-pin of U4 is connected to resistor R17.
  • One end of the diode D9, the other end of the resistor R17 and the diode D9 is connected to the 2 pin of the U4, the '+' of the electrolytic capacitor C16 and the end of the R18 and the 2 end of the U4, and the '-' of the electrolytic capacitor C16 are connected to the end of the R18.
  • the oscillating excitation part consists of the integrated block IC E, resistors R83, R64, R105, capacitor C40, and the integrated block IC E is a dedicated control chip with pin 20, and pins 16 and 10 of the integrated block IC E are the power input terminals of the power supply part output 5.
  • the 5th leg of IC E is connected to the resistor R108, the other end of R108 is connected to the ground, the 3 pin of IC E is connected to the resistor R100, and the other end of R100 is connected to the ground.
  • D5-terminal is connected with IC E's 2 pin, the other end is connected with resistor R37, and R37 is another. One end is connected to the ground.
  • IC E's 7, 8, 12, and 13 pins output four sets of driving waveforms.
  • IC E's 7-pin is connected to IC A's 3-pin.
  • IC E's 12-pin and resistor R113 is connected, the other end of R113 is connected with pin 1 of IC J, pin 6 of IC E is connected with pin 3 of U5, pin 2 of U5 is grounded, pin 1 of U5 is connected with the connection point of D6 and R46.
  • This part consists of integrated block IC A, resistor R2, capacitors Cl, C7, C12.
  • One drive pulse generated by pin 12 of IC 1 is connected.
  • One end of IC E's 12-pin resistor R118 is connected to the other end of resistor R118.
  • Set Block 1 of IC J, IC 2, 2 and 3 are connected to one end of capacitor C11.
  • Capacitor C11 is connected to one end of resistor R49 and potentiometer R103.
  • Resistor R49 and potentiometer R103 are connected to IC J 4 and 5 respectively.
  • IC J's 6 pin is connected to its 9 pin, 8 pin, 11 pin are connected, its 10 pin is connected to IC F's 3 pin, IC J's 1, 2 connected to the power supply part output 5 '+ ' DC power supply , 7 feet grounded. Adjust the potentiometer R103 to adjust the operating point.
  • the 7-pin capacitor C12 of the integrated block IC E is connected. The other end of the capacitor C12 is connected to the 13 pin of the IC A.
  • the output voltage U is connected to the 3-pin phase comparator of the integrated block IC A.
  • One input terminal, with the integrated block IC E pin 8 drive pulse is frequency and phase locked.
  • IC 16 has a pin connected to the power supply, pin 9 is connected to capacitor Cl and resistor R2, and the other end of the resistor is connected to one end of capacitor C7. The other end of capacitor C7 is grounded, and the other legs of IC A are suspended.
  • This part consists of the sensor, IC block F, resistors R98, R17, R13, R14, R75, R107, R18, capacitors C42, C16, and integrated block IC B.
  • IC F is a dedicated phase voltage comparator of 16 pins. Its 1 pin is connected to one end of resistor R17. R17 and R98 are connected in series to ground. The 5th and 8th pins are grounded. The capacitors C42, 13 and 9 are connected in series between pins 6 and 7. The pin is connected to the resistor R13, the 10, 11, and 12 pins are respectively connected to one end of the resistors R107, R75, and R14, and the other ends of the R107, R75, and R14 are grounded, and the 14th pin of the IC F is connected to the sampling circuit of the sensor.
  • ICs 1 and 2 are connected to one end of resistor R5, the other end of R5 is connected to R3, the other end of R3 is connected to one end of R8, R9, C21, and the other end of capacitor C21 is grounded.
  • Pin 3 of IC B is connected to resistor R10, and the other end of resistor R10 is connected to pin 9 of IC A.
  • IC B's 4 power supply part outputs 5's '+' DC power supply
  • power supply part output 5's '+' DC connects to R11's end
  • R11's other end is connected to 5 feet
  • one end of capacitor C20 is connected to IC B's 5 feet. The other end is grounded.
  • the other end of the resistor R12 is connected in series with the capacitor C39, the other end of the resistor R12 is connected to the pins 6 and 7 of the IC B, the other end of the capacitor C39 is grounded, the capacitor C36 is connected in series with the resistor R4, and the other end of the resistor R4 is connected to the IC B. 14 feet, the other end of capacitor C36 is grounded.
  • IC B's 13 and 14 pins are connected in series with resistor R6, IC B's 12-pin is connected to one end of resistor R7, the other end of R7 is connected to one end of capacitors C19 and R18, the other end of capacitor C19 is grounded, and the other end of resistor R8 is connected. Connected to R9.
  • the voltage and phase sampling of the power output part by the sensor After the voltage and phase sampling of the power output part by the sensor, after the 14-pin comparison of the integrated block IC F, the voltage and phase are locked. If the sampling voltage is high, the load is too small, the protection is effective, the host does not work, the indicator LED 1 flashes.
  • This part consists of sensor, integrated block IC F, resistors R98, R17, R13, R14, R75, R107, R18, capacitors C42, C16, integrated block IC K
  • IC F is a 16-pin phase voltage comparator, 1 pin Connect one end of resistor R17, R17 and R98 are connected in series with ground, 5 and 8 feet are grounded, and capacitor C42 is connected in series between pins 6 and 7. Pins 13 and 9 are connected in series with resistor R13, and 10, 11, and 12 pins are respectively connected. One end of resistors R107, R75, R14, R107, The other end of R75 and R14 is grounded, and pin 14 of IC F is connected to the sampling circuit of the sensor.
  • IC 2's 1 and 2 pins are connected to one end of resistor R5, the other end of R5 is connected to R3, the other end of R3 is connected to one end of R8, R9, C21, and the other end of capacitor C21 is grounded;
  • IC B's 3 pin and Resistor R10 is connected, the other end of resistor R10 is connected to pin 9 of IC A;
  • IC B is connected to DC power supply, DC is connected to one end of R11, the other end of R11 is connected to 5 pin, and one end of capacitor C20 is connected to 5 pin of IC B, The other end is grounded.
  • the resistor R12 is connected in series with the capacitor C39, the other end of the resistor R12 is connected to the pins 6 and 7 of the IC B, the other end of the capacitor C39 is grounded, the capacitor C36 is connected in series with the resistor R4, and the other end of the resistor R4 is connected to the IC B. 14 feet, the other end of the capacitor C36 is grounded; the resistor R6 is connected in series between the 13 and 14 pins of the IC B, the 12-pin of the IC B is connected to one end of the resistor R7, the other end of the R7 is connected to the end of the capacitor C19, R18, and the capacitor The other end of C19 is grounded, and the other end of resistor R8 is coupled to R9.
  • IC K's 1 and 2 pins are connected to resistor R114.
  • the other end of R114 is connected to capacitor C23 and resistor R76.
  • the other end of capacitor C23 is grounded.
  • IC K pin 3 is connected to resistor R68.
  • the other end of R68 is connected to capacitor.
  • C6 the resistor R72 is connected, the other end of the capacitor C6 is grounded, the other end of the R72 is connected to the capacitor C32 to the pin 10 of the IC F, the other end of the capacitor C32 is grounded, the pin 4 of the IC K is the power input end, and the 5 pin is R72 is connected, the other end of R72 is connected to capacitor C33 and IC E pin 2, and the other end of capacitor C33 is grounded.
  • IC K 6, 7 pin, resistor R125, capacitor C35 are connected, resistor R125 is connected with resistor R80, R80 is connected with one end of capacitor C34, the other end of C34 is grounded, and pin 8 of IC K is connected with resistors R22 and R23.
  • the other end of the R22 is connected to the diode D8.
  • the other end of the D8 is connected to the resistor R26, the resistor R81 and the 11 pin of the IC I.
  • the other end of the R13 is connected to the LED, and the other end of the LED is grounded.
  • the IC K 9 pin is connected to the resistor R70, 10 The other end is connected to capacitor C47 and resistor R69, the other end of capacitor C47 is grounded, the other end of R69 is connected to capacitor C37 and resistor R45 to pin 12 of IC K, and resistor R45 is grounded to the other end of capacitor C37.
  • IC The 11th pin of K is the ground terminal, the 14th pin of IC K is connected with diode D7, the other end of D7 is connected to the connection end of resistor R81 and diode D8, and the voltage and phase sampling of the power output part through the sensor is passed through the integrated block IC. After the F comparison, the voltage and phase are locked. If the sampled voltage is low, the overload protection is effective, the host does not work, and the indicator A3 flashes.
  • This part consists of integrated blocks IC D, IC G, IC H, IC I, Ul and sensors. The following describes the peripheral circuit connections of each part.
  • the sampling circuit is connected to J4, one end of J4 is grounded, the other end is connected with diode D10, and the other end of D10 is connected with '+' of electrolytic capacitor C10, capacitor C27, one end of potentiometer R115, capacitor C10, C27, potentiometer R115 One end is grounded, the midpoint of the potentiometer is connected to the 1 pin of U1, the 2 pin of U1 is grounded, the 3 pin of U1 is connected to the '+' of the power supply part 5, the 4 pin is connected to the resistor R92 and then to the 8 pin of IC D. .
  • R60 and R28 are connected in series and connected to pin 1 and pin 14 of IC K.
  • R93 and R29 are connected in series to connect between pin 2 and pin 13.
  • R59 and R88 are connected in series, and then connected to IC 2, pin 4, IC.
  • the 5 feet of D are connected to one end of R27, and the other end of R27 is connected with R89 and C3.
  • the other end of C3 is grounded.
  • the other end of R89 is connected to the junction of R86 and R34.
  • the 6th pin of IC D is connected with diode D1, D2, capacitor C15 and resistor R52. The other end of capacitor C15 and resistor R52 is grounded.
  • Diodes D1 and D2 The two ends are connected with the sensor, one end of 56 is connected with the 9 pin of the IC, the other end is connected to the connection point of the capacitor C10, the resistors R84, R85, one end of the R58 is connected with the 11 pin of the IC, and the other end is connected to The junction of capacitor Cl l , resistor R86, R34, 12 pin of IC D is grounded.
  • Resistor R43 is connected to pin 1 of IC G, the other end is connected to pin 2 of IC I, resistor R44 is terminated to pin 2 of IC G, and the other end is connected to pin 4 of IC H.
  • Pin 3 of IC G is connected to capacitor C22 and R35 connection point, capacitor C22 accepts power supply, R35 is grounded, IC G's 4 pin is grounded, IC G's 5 pin is the power input terminal, IC G 6 pin, resistor R97, resistor R97 is grounded at the other end, IC G's 7-pin capacitor C26 is connected to resistor R36, the other end of the resistor is grounded, the other end of the capacitor is connected to the power supply, IC G is grounded at 8 feet, resistor R40 is terminated with 9 pins of IC G, and the other end is connected to IC H 3 pin, resistor R39—terminal 10 pin of IC G, the other end is connected to pin 1 of IC H, pin 11 of IC G is connected to the junction of
  • the resistor R94 is connected to pin 12 of IC G, the other end is grounded, IC 13 is suspended, IC 14 is grounded, pin 15 of IC G is connected to the junction of resistor R31 and capacitor C17, and the other end of capacitor C17. Connect the power supply, and the other end of the resistor R31 is grounded. Pin 16 of IC G is the power input.
  • IC 2's 2 pin is connected to IC I's 10, IC H's 5 and 7 are grounded, IC H's 6 and 8 are connected, resistors R41 and R61 are connected to IC H's 8 pin, and the other end of resistor R41 Ground, the other end of the resistor R61 is connected to the capacitor C24, and the other end of the capacitor C24 is grounded.
  • IC H's 10, 12 phase connection, IC H's 11 and 13 pins are connected, IC H's 14 pin is the input end of the power supply.
  • IC I's 7 and 8 are grounded, 9 and 13 are connected, and 14 is the input of the power supply.
  • the rectified voltage is sampled by the sensor, and the voltage is obtained by rectifying and filtering after sampling.
  • the optocoupler U1 is turned on, and the protection circuit composed of the integrated blocks IC D, IC G, IC H, IC I
  • the function is to limit the voltage protection.
  • the host is in the state of voltage-limiting protection and the host is still working normally.
  • This part consists of integrated blocks IC C, IC G, IC H, IC I and sensor current sampling.
  • the current sampling coil of the sensor is connected to J1 and 2, and after full-bridge rectification, it is connected to potentiometer R102.
  • Terminal 3 R102 has 3 terminals connected to ground, R102 has 2 terminals connected to the junction of resistor R51 and capacitor C13, the other end of C13 is grounded, R51 is connected with pin 4 of IC C, and resistor R54 is connected to pin 5 of IC C. Connected, the other end is connected to the junction of resistors R55 and R82, the other end of R55 is connected to the power supply, and the other end of R82 is grounded.
  • the sensor samples the current, after full-wave rectification, it is compared with the reference voltage through the potentiometer R102 after sampling. When the potentiometer R102 is adjusted, it is compared by the integrated block IC C. If the sampled current signal is too large, current limiting protection The host is in the current-limit protection state and the host is still working normally.
  • the soft start part is composed of IC E internal integration and external capacitor C45.
  • the '+' of C45 is connected with the 6-pin of IC E, the '-' of C45 is grounded, the 6-pin of IC E is in the integrated circuit, and the external capacitor C45 is used.
  • a sawtooth wave is formed at the 6th leg of IC E, and the C45 capacitor capacity should be selected appropriately to avoid starting too fast or too slow.
  • the temperature protection consists of temperature control switch J3, integrated block IC G, IC H, IC I, temperature control switch J3—terminal power supply, the other end is connected to diode D9, the other end of D9 is connected with the connection point of resistor R81 and diode D8.
  • the temperature switch is in the on state.
  • the temperature protection circuit works, the indicator light A4 is on, the host is in the temperature protection state, and the host does not work.
  • the core part is composed of the full bridge of the power tube IGBT, and the three-phase electric A, B, C are connected to the input end of the three-phase full bridge D.
  • the '+' of the rectifier bridge is connected with one end of the reactor, and the other of the reactor One end is connected to the series of filter capacitors C1 and C2, C3 and C4, C5 and C6 '+, and the '_' of C2, C4, C6 is connected to the rectifier bridge '-, the E-pole and Q2 of the power tube Q1.
  • the Q pole, the E pole of Q3 and the Q pole of Q4 are connected in series to the Q pole of Ql, Q3 and the E pole of Q2 and Q4 respectively, and the '+, and '-, the connection of the three-phase rectifier bridge, the load end Connected to the E pole of Q1, the other end is connected to the sensor, the other end of the sensor is connected to the E pole of Q3, and the reactive power compensation and harmonic processing are performed by the reactor, thereby improving the power factor and greatly reducing the reactive power. It is filtered by capacitors Cl, C2, C3, C4, C5, C6, and its core part is composed of high-power IGBT full bridge.
  • the sensor integrates current sampling, current phase sampling, voltage sampling circuit, and feeds its information back to the main control part to make the host work normally.

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Description

感应加热电源电路
技术领域
本发明涉及电器产品, 具体的说是一种感应加热电源电路。
背景技术
传统的加热电源是采用电阻丝加热方式,其热效率很低, 这种加热方式主要是靠 接触传导来传递热能, 用电阻丝制成的各种加热板或加热圈, 只有一个面接触到需要 加热的部位, 造成了很大一部分热能耗散在空气中了, 不仅造成了能源的损失, 而且 由于电阻式直接与被加热体接触, 可能导致漏电造成人员伤亡, 由于电阻丝加热本身 会发热,不仅易损坏而且维护费用高,而且可能引起火灾而造成不必要的经济损失等。
从包括中国专利在内的有关资料检索表明, 目前己有一些成果和专利。如专利申 请号为 200610149995.3, 200520100520.6, 200510041878.0等,但都仅仅局限在局部结 构中应用,尚见到一种通用的感应加热电源的相关报道。
发明内容
为了克服现有技术的空缺,本发明的目的是要提出一种利用电磁感应的原理, 设 计的一种通用的感应加热电源电路。
本发明解决其技术问题所采用的技术方案是: 由主控部分与功率部分构成的一 种感应加热电源电路, 其特征是: 主控部分有开关电源及驱动部分、 振荡激励部分、 相位及电压锁定、 负载过小检测、 负载过大检测、 限压保护、 限流保护、软启动部分、 温度保护部分组成; 功率部分由全桥功率管组成的核心部分与传感器组成。
一、 主控部分:
①开关电源及驱动部分:
市电 AC 220V经过 R12及电阻 RU, 联接到电容 C11的两端及共模电感 T l两端, 共模电感 T1的另外两端接至电容 C12两端,再联接到整流桥 B,整流桥 B正极与电解 电容 C4的正极相联接,整流桥 B的负极与电解电容 C4的负极相联接至热地, 电阻 R3 与电解电容 C4的两端相联、 电容 C5、 电阻 R3与齐纳二极管 D5的一端相联接接至变 压器 T2的初级绕组, 另一端相联接至二极管 D4, 二极管 D4的另一端接至变压器 T2 初级绕组的另一端, 接至开关管 U1的 3脚, 开关变压器 T1的 DC次级绕组一端接到 二极管 D6, 二极管 D6的一端接电解电容 C7的正极, 开关变压器的 DC次级绕组的另 一端为 DC冷地, 经过二极管 D6, 电容 C7、 电感 L2、 电解电容 C8后, DC电压通过 电阻 R15串接 R16, 经稳压二极管 TL431后, 通过电阻 R5、 R10、 电容 C6反馈, 接至 光耦 U2的 1脚, 反馈绕组的一端接至热地, 另一端接到二极管 D2的一端, D2的另一 端接到 U2的 3脚, U2的 4脚, 接到电解电容 C15的正极及电容 C9的一端, 接到开关 管 Ul的 2脚, 电解电容 C15的负极与电阻 R9相联接, R9与 C9的另一端接至热地, 次级绕组 I的一端接至二极管 D11的一端, D11的另一端接电感 L1的一端, L1的另 一端接电解电容 C2的正极、 Cl、 R1的一端, 变压器的该绕组的另一端与 C2的负极、 C1及 R1的另一端相联,次级绕组 II的一端接至二极管 D12的一端, D12的另一端接 电感 L12的一端, L12的另一端接电解电容 C22的正极、 C32、 R32的一端, 变压器的 该绕组的另一端与 C22的负极、 C32及 R32的另一端相联,次级绕组 I II的一端接至二 极管 D13的一端, D13的另一端接电感 L13的一端, L31的另一端接电解电容 C32的 正极、 C23、 R33的一端, 变压器的该绕组的另一端与 C32的负极、 C23及 R33的另一 端相联, 次级绕组 IV的一端接至二极管 D14的一端, D14的另一端接电感 L14的一 端, L14的另一端接电解电容 C34的正极、 C24、 R34的一端, 变压器的该绕组的另一 端与 C34的负极、 C24及 R34的另一端相联, 再接电解电容 C3的正极及 U4的 1脚输 入端, U4的 3脚接电阻 R17、 二极管 D9的一端, 电阻 R17与二极管 D9的另一端接到 U4的 2脚, 电解电容 C16的正极与 R18的一端与 U4的 2端, 电解电容 C16的负极与 R18的一端接至 C12的负极端, 即该绕组的冷地端, 输出 4组的直流电压, 四组电压 经过由集成块 U4及电阻 R17、 R18、二极管 D9组成的外部稳压电路,将四组的电压稳 压, 由振荡电路产生的四组驱动脉冲, 通过 IGBT专驱芯片 U3后, 输出四组驱动, 分 别与功率板的驱动 1、 驱动 2、 驱动 3、 驱动 4相联接。
②振荡激励部分:
振荡激励部分由集成块 IC E , 电阻 R83、 R64、 R105, 电容 C40, 集成块 IC E是 20脚为控制芯片, 集成块 IC E的 16、 10脚为电源输入端, IC E的 20脚接地, IC E 的 19脚接电容 C40的一端, 另一端接地, IC E的 18脚接、 R105、 R64、 R83的一端, R105的另一端接地, R64、 R83的另一端相联后, 接光耦 U2的 3脚, U2的 4脚接地, IC E的 17脚接 R109, R109另端接地, IC E的 15脚接 R106, 106的另一端接地, IC E的 9脚接电阻 R124, R124的另一端接电源部分输出 5的正极, 电解电容 C46的 正极接电源部分输出 5的正极, C46的负极接地, IC E的 4脚接电容 C29, C29的另 一端与地相联接, IC E的 5脚与电阻 R108联接, R108的另一端与地相联接, IC E 的 3脚与电阻 R100相联, R100的另一端与地相联接, 二极管 D5—端与 IC E的 2脚 相联, 另一端与电阻 R37相联接, R37的另一端与地相联接, IC E的 7、 8、 12、 13 脚输出四组驱动波形, IC E的 7脚与 IC A的 3脚相联接, IC E的 12脚与电阻 R113 相联, R113的另一端与 IC J的 1脚相联接, IC E的 6脚接 U5的 3脚, U5的 2、 4 脚接地, U5的 1脚与 D6和 R46的联接点相联接。
③相位及电压锁定: 该部分由集成块 IC A、 电阻 R2、 电容 Cl、 C7、 C12组成, 集成块 IC E的 12脚 接电阻 R118的一端, 电阻 R118的另一端接到集成块 IC J的 1脚, IC J的 2、 3脚与 电容 C11的一端相联 , 电容 C11与电阻 R49、 电位器 R103的一端联接, 电阻 R49与 电位器 R103分别接 IC J的 4、 5脚, IC J的 6脚接至其 9脚, 8脚、 11脚相联接, 其 10脚接到 IC F的 3脚, IC J的 1、 2接 DC电源, 7脚接地; 调节电位器 R103, 集 成块 IC E的 7脚接电容 C12联接, 电容 C12的另一端接 IC A的 13脚, 输出电压 U 接至集成块 IC A的 3脚相位比较器的一个输入端, 与集成块 IC E第 8脚锁定; 其中 IC A的 16脚接电源, 9脚与电容 Cl、 电阻 R2相联, 电阻另一端与电容 C7的一端相 联, 电容 C7的另一端接地, IC A的其他脚悬空。
④负载过小检测:
该部分由传感器, 集成块 IC F、 电阻 R98、 R17、 R13、 R14、 R75、 R107、 R18、 电容 C42、 C16, 集成块 IC B组成。
IC F为 16脚的相位电压比较器, 其 1脚接电阻 R17的一端, R17与 R98串联接 地, 其 5、 8脚接地, 其 6、 7脚之间串接了电容 C42, 13与 9脚串接了电阻 R13, 10、 11、 12脚分别接电阻 R107、 R75、 R14的一端, R107、 R75、 R14的另一端接地, IC F 的 14脚接至传感器的采样电路。
IC B的 1、 2脚相联接至电阻 R5的一端, R5的另一端接 R3, R3的另一端与 R8、 R9、 C21的一端相联接, 电容 C21的另一端接地; IC B的 3脚与电阻 R10联接, 电阻 R10的另一端接至 IC A的 9脚; IC B的 4接 DC电源, DC接 R11的一端, R11的另 一端接 5脚, 电容 C20的一端接 IC B的 5脚, 另一端接地, 电阻 R12与电容 C39串 联后, 电阻 R12的另一端接 IC B的 6、 7脚, 电容 C39的另一端接地, 电容 C36与电 阻 R4串联后, 电阻 R4的另一端接 IC B的 14脚, 电容 C36的另一端接地; IC B的 13与 14脚之间串接了电阻 R6, IC B的 12脚接电阻 R7的一端, R7的另一端, 接电 容 C19、 R18的一端, 电容 C19另一端接地, 电阻 R8的另一端与 R9相联接。
⑤负载过大检测:
该部分由传感器, 集成块 IC F、 电阻 R98、 R17、 R13、 R14、 R75、 R107、 R18、 电容 C42、 C16, 集成块 IC K组成, IC F为 16脚的相位电压比较器, 其 1脚接电阻 R17的一端, R17与 R98串联接地, 其 5、 8脚接地, 其 6、 7脚之间串接了电容 C42, 13与 9脚串接了电阻 R13, 10、 11、 12脚分别接电阻 R107、 R75、 R14的一端, R107、 R75、 R14的另一端接地, IC F的 14脚接至传感器的采样电路。
IC B的 1、 2脚相联接至电阻 R5的一端, R5的另一端接 R3, R3的另一端与 R8、 R9、 C21的一端相联接, 电容 C21的另一端接地; IC B的 3脚与电阻 R10联接, 电阻 RIO的另一端接至 IC A的 9脚; IC B的 4接 DC电源, DC接 Rl l的一端, R11的另 一端接 5脚, 电容 C20的一端接 IC B的 5脚, 另一端接地, 电阻 R12与电容 C39串 联后, 电阻 R12的另一端接 IC B的 6、 7脚, 电容 C39的另一端接地, 电容 C36与电 阻 R4串联后, 电阻 R4的另一端接 IC B的 14脚, 电容 C36的另一端接地; IC B的 13与 14脚之间串接了电阻 R6, IC B的 12脚接电阻 R7的一端, R7的另一端, 接电 容 C19、 R18的一端, 电容 C19另一端接地, 电阻 R8的另一端与 R9相联接。
IC K的 1、 2脚与电阻 R114相联, R114的另一端与电容 C23、 电阻 R76相联, 电 容 C23的另一端接地, IC K的 3脚与电阻 R68相联, R68的另一端与电容 C6、 电阻 R72联接, 电容 C6的另一端接地, R72的另一端与电容 C32相联至 IC F的 10脚, 电 容 C32的另一端接地, IC K的 4脚为电源输入端, 其 5脚与 R72相联接, R72的另一 端接至电容 C33及 IC E的 2脚, 电容 C33的另端接地; IC K的 6、 7脚、 电阻 R125、 电容 C35相联接, 电阻 R125与电阻 R80相联, R80与电容 C34的一端相联接, C34的 另一端接地, IC K的 8脚与电阻 R22、 R23相联, R22的另一端接二极管 D8, D8的另 一端接电阻 R26、 电阻 R81及 IC I的 11脚, R13的另一端接 LED, LED的另一端接地, IC K的 9脚接电阻 R70, 10的另一端与电容 C47、 电阻 R69相联接, 电容 C47的另 一端接地, R69的另一端与电容 C37、 电阻 R45相联接至 IC K的 12脚, 电阻 R45与 电容的 C37的另一端接地, IC K的 11脚为接地端, IC K的 14脚与二极管 D7相联接, D7的另一端接至电阻 R81与二极管 D8的联接端。
⑥限压保护:
该部分由集成块 IC D、 IC G、 IC H、 IC I、 Ul 及传感器组成, 采样电路接于 J4, J4的一端接地, 另一端与二极管 D10联接, D10的另一端接电解电容 C10的正极、 电 容 C27、 电位器 R115的一端, 电容 C10、 C27、 电位器 R115的另一端接地, 电位器的 中点与 U1的 1脚相联, U1的 2脚接地, U1的 3脚接, 4脚接电阻 R92后接至 IC D 的 8脚; R60与 R28串联后接至 IC K的 1脚与 14脚之间, R93与 R29串联后接至 2 脚与 13脚之间, R59与 R88串联后, 接至 IC D的 2、 4脚, IC D的 5脚, 接 R27的 一端, R27的另一端与 R89、 C3相联, C3另一端接地, R89的另一端接 R86与 R34的 联接点, IC D的 6脚与二极管 Dl、 D2、 电容 C15、 电阻 R52相联接, 电容 C15、 电阻 R52的另一端接地, 二极管 D1与 D2的两端与传感器的相联, R56的一端与 IC的 9脚 相联接, 另一端接至电容 C10、 电阻 R84、 R85的联接点, R58的一端与 IC的 11脚相 联接, 另一端接至电容 Cl l、 电阻 R86、 R34的联接点, IC D的 12脚接地。
电阻 R43接至 IC G的 1脚, 另一端接至 IC I的 2脚, 电阻 R44—端接至 IC G 的 2脚, 另一端接至 IC H的 4脚, IC G的 3脚接到电容 C22与 R35的联接点, 电容 C22接受电源, R35接地, IC G的 4脚接地, IC G的 5脚为电源输入端, IC G的 6 脚, 接电阻 R97, 电阻 R97的另一端接地, IC G的 7脚接电容 C26与电阻 R36的联接 点, 电阻的另一端接地, 电容的另一端接电源, IC G的 8脚接地, 电阻 R40—端接 IC G的 9脚, 另一端接 IC H的 3脚, 电阻 R39—端接 IC G的 10脚, 另一端接 IC H 的 1脚, IC G的 11脚接至电容 C18与 R32的联接点, 电容 C18的另一端接电源, 电 阻 R32的另一端接地, 电阻 R94接 IC G的 12脚, 另一端接地, IC G的 13悬空, IC G 的 14脚接地, IC G的 15脚接至电阻 R31与电容 C17的联接点, 电容 C17另一端接电 源, 电阻 R31的另一端接地; IC G的 16脚为电源输入端。
IC H的 2脚与 IC I的 10相联接, IC H的 5、 7脚接地, IC H的 6脚、 8脚相联 接, 电阻 R41、 R61与 IC H的 8脚联接, 电阻 R41的另一端接地, 电阻 R61的另一端 与电容 C24相联, 电容 C24另一端接地; IC H的 10、 12相联接, IC H的 11、 13脚 相联接, IC H的 14脚为电源的输入端; IC I的 7、 8脚接地, 9、 13脚相联接, 14 脚为电源的输入端。
⑦限流保护:
该部分由集成块 IC C、 IC G、 IC H、 IC I及传感器电流釆样构成, 传感器的电 流采样线圈与 J1的 1、 2相联接后, 联接于电位器 R102的 1端, R102的 3端与地联 接, R102的 2端接于电阻 R51与电容 C13的联接点, C13的另一端接地, R51与 IC C 的 4脚相联接, 电阻 R54与 IC C的 5脚相联接, 另一端接于电阻 R55与 R82的联接 点, R55的另一端接电源, R82的另一端接地 ·' IC C的 3脚电源输入端, 电阻 R48 一端接于 IC C的 2脚, 另一端接于 IC C的 4脚, IC C的 2脚与电阻 R25、 R26与电 容 C8的联接点联接, R25的另一端接电源, 电阻 R26与电容 C8的另一端接地。
⑧软启动部分:
软启动部分由 IC E 内部集成与外部由电容 C45构成, C45的正极与 IC E的 6脚 联接, C45的负极接地。
⑨温度保护:
温度保护由温控开关 J3、 集成块 IC G、 IC H、 IC I构成, 温控开关 J3—端接电 源, 另一端接二极管 D9, D9的另一端接电阻 R81与二极管 D8的联接点。
二、 功率部分-
①核心部分:
该核心部分由功率管 IGBT的全桥组成, 三相电 A、 B、 C接至三相全桥 D的输入 端的整流桥,整流桥的正极与电抗器一端联接, 电抗器的另一端与串联的滤波电容 C1 和 C2, C3和 C4, C5和 C6的正极相联, C2、 C4、 C6的负极接至整流桥的负极, 功率 管 Ql的 E极和 Q2的 Q极、 Q3的 E极和 Q4的 Q极串接后分别接至 Ql、 Q3的 Q极和 Q2、 Q4的 E极分别与三相整流桥的正极与负极联接, 负载一端接至 Q1的 E极, 另一 端接至传感器, 传感器的另一端接 Q3的 E极。
②传感器:
传感器集成了电流采样、 电流相位采样、 电压采样电路。
所述的电抗器为无功功率补偿的电感。
所述的采样为采样线圈。
本发明的加热电源电路采用三相四线的输入方式, 整流后, 通过电抗器进行无功 功率补偿及谐波的处理, 从而改善了功率因数, 大大的减少了无功功率, 再经过电容 滤波, 其核心部分为大功率的 IGBT全桥组成。 本发明控制部分采用四组驱动, 使大 功率的功率管, 保持在零电压开关状态, 损耗最小, 安全区大, 进一步地提高了工作 效率; 并通过传感器, 由锁相环完成相位同步的自动控制, 自动跟踪金属导体的固有 频率及其参数的变化, 控制部分通过传感器对负载进行电流采样、 电流相位釆位、 电 压采样、 缺相采样, 温度采样, 并综合了各种保护电路, 使该加热电源工作处于安全 且效率高的方式中, 从而避免了传统电阻丝加热方式存在的各种安全隐患。
本发明的产品可以广泛地应用到塑料用的吹膜机、 拉丝机、 注塑机、 造粒机, 橡 胶用挤出机、 硫化机、 电缆挤出机、 石油加热, 以及人们日常生活中的澡堂加热等方 方面面。
本发明的有益效果是: 由于本发明采用了 LC串联谐振的方式, 工作时, 功率输 出部分把直流电压逆变成 25KHz的超音频交变磁场。该超音频交变磁场产生的磁力线 通过保温绝缘材料后, 通过负载作用到金属材料制成的被加热物体上。该金属物体在 感应到超音频交变磁场后在金属内部产生涡流, 发热升温, 从而对金属导体进行了热 处理, 热损耗小, 替代了传统以电阻丝的加热方式。 因此, 本发明的产品负载线圈本 身不发热, 线圈不会因为本身发热而起安全隐患。 同时本发明综合了各种保护电路, 产品的寿命更长久; 负载以电磁感应的方式对金属导体进行热处理, 热损耗小, 加热 效果好; 工作频率设定为 25KHz左右的超音频范围, 不会产生影响生产环境的噪音, 也不会对人体产生影响; 采用保温系统, 进一步提高热能的利用率, 进一步的节省了 电能。
附图说明
以下通过附图和具体实施例对本发明进行进一步描述。
图 1为本发明的方框图。
图 2为本发明开关电源电路视图。 图中 1为输出 1、 2为输出 2、 3为输出 3、 4为输出 4、 5为输出 5, 其中输出 1、 输出 2、 输出 3和输出 4输出 25VDC电压, 输出 5输出 12VDC电压。
图 3为本发明功率板 IGBT驱动电路视图。
图中 6为驱动脉冲, 7为功率板 IGBT驱动。
图 4为本发明功率板电路视图。
图中 A、 B、 C为三相线; 8为电抗器, 9为负载输出, 10为传感器, 11为驱动 1, 12为驱动 2, 13驱动 3, 14为驱动 4。
图 5为本发明加热电源主控部分电路视图。
图中 IC A、 F为相位电压比较器, IC B、 C、 D、 K为比较器, IC Ε为 PWM控制 器, IC G为 RS触发器, IC H、 I为异或门, IC J为非门。
具体实施方式
实施例 1 :
请参阅各视图, 本实施例由主控电路部分与功率电路部分构成。
一、 主控部分:
①开关电源及驱动部分:
市电 AC 220V经过温度保险 R12及负温度系数的热敏电阻 Rl l, 联接到电容 C11 的两端及共模电感 T1两端, 共模电感的另外两端接至电容 C12两端, 滤除了共模干 扰与差模干扰后, 再联接到整流桥 B交流输入端进行整流, 整流桥输出 +与电解电容 C4的 '+ ' 相联接, 整流桥 B的 '-' 与电解电容 C4的 '-' 相联接至热地, 从而进行 滤波, 电阻 R3与电解电容 C4的两端相联、 电容 C5、 电阻 R3与齐纳二极管 D5的一端 相联接接至变压器 T2的初级绕组,另一端相联接至二极管 D4,二极管 D4的另一端接 至变压器 T2初级绕组的另一端, 接至开关管 U1的 3脚, 开关变压器 T1的 12V DC次 级绕组一端接到二极管 D6, 二极管 D6的一端接电解电容 C7的 '+', 开关变压器的 12V DC次级绕组的另一端为 12V DC冷地, 经过二极管 D6整流, 电容 C7、 电感 L2、 电解电容 C8滤波后, 输出 12V的直流电压, 12V DC电压通过电阻 R15串接 R16进行 采样, 高精度稳压二极管 TL431进行稳压后, 通过电阻 R5、 R10, 电容 C6反馈, 接至 光耦 U2的 1脚, 反馈绕组的一端接至热地, 另一端接到二极管 D2的一端, D2的另一 端接到 U2的 3脚, U2的 4脚, 接到电解电容 C15的 '+, 及电容 C9的一端, 接到开 关管 U1的 2脚, 电解电容 C15的 '-'与电阻 R9相联接, R9与 C9的另一端接至热地, 其他四组次级输出, 只介绍其中的一组, 一组次级绕组的一端接至二极管 D1的一端, D1的另一端接电感 L1的一端, L1的另一端接电解电容 C2的 '+'、 Cl、 R1的一端, 变压器的该绕组的另一端与 C2的负极、 C1及 R1的另一端相联,次级绕组 II的一端接 至二极管 D12的一端, D12的另一端接电感 L12的一端, L12的另一端接电解电容 C22 的正极、 C32、 R32的一端, 变压器的该绕组的另一端与 C22的负极、 C32及 R32的另 一端相联,次级绕组 I I I的一端接至二极管 D13的一端, D13的另一端接电感 L13的一 端, L31的另一端接电解电容 C32的正极、 C23、 R33的一端, 变压器的该绕组的另一 端与 C32的负极、 C23及 R33的另一端相联, 次级绕组 IV的一端接至二极管 D14的 一端, D14的另一端接电感 L14的一端, L14的另一端接电解电容 C34的正极、 C24、 R34的一端, 变压器的该绕组的另一端与 C34的负极、 C24及 R34的另一端相联, 再 接电解电容 C3的 '+'及 U4的 1脚输入端, U4的 3脚接电阻 R17、二极管 D9的一端, 电阻 R17与二极管 D9的另一端接到 U4的 2脚, 电解电容 C16的 '+ ' 与 R18的一端 与 U4的 2端, 电解电容 C16的 '-' 与 R18的一端接至 C12的 '-' 端, 即该绕组的 冷地端, 输出 4组约 25V的直流电压, 这四组电压经过由集成块 U4及电阻 R17、 R18、 二极管 D9组成的外部稳压电路,将四组 25V的电压稳压在 20V, 由振荡电路产生的四 组驱动脉冲, 通过 IGBT专驱芯片 U3进行放大后, 输出四组驱动, 分别与功率板的驱 动 1、 驱动 2、 驱动 3、 驱动 4相联接。
②振荡激励部分:
振荡激励部分由集成块 IC E , 电阻 R83、 R64、 R105 , 电容 C40, 集成块 IC E是 20脚为专用控制芯片, 集成块 IC E的 16、 10脚为电源部分输出 5的的 电源输 入端, IC E的 20脚接地, IC E的 19脚接电容 C40的一端, 另一端接地, IC E的 18 脚接、 R105、 R64、 R83的一端, R105的另一端接地, R64、 R83的另一端相联后, 接 光耦 U2的 3脚, U2的 4脚接地, IC E的 17脚接 R109, R109另端接地, IC E的 15 脚接 R106, R106的另一端接地, IC E的 9脚接电阻 R124, R124的另一端接电源部分 输出 5的 '+ ' , 电解电容 C46的 '+ ' 接电源部分输出 5的 '+' , C46的 '-' 接地, IC E的 4脚接电容 C29, C29的另一端与地相联接, IC E的 5脚与电阻 R108联接, R108的另一端与地相联接, IC E的 3脚与电阻 R100相联, R100的另一端与地相联接, 二极管 D5—端与 IC E的 2脚相联, 另一端与电阻 R37相联接, R37的另一端与地相 联接, IC E振荡激励后, IC E的 7、 8、 12、 13脚输出四组驱动波形, IC E的 7脚与 IC A的 3脚相联接, IC E的 12脚与电阻 R113相联, R113的另一端与 IC J的 1脚相 联接, IC E的 6脚接 U5的 3脚, U5的 2、 4脚接地, U5的 1脚与 D6和 R46的联接点 相联接。
③相位及电压锁定:
该部分由集成块 IC A、 电阻 R2、 电容 Cl、 C7、 C12组成, 集成块 IC E 的 12脚 产生的一路驱动脉冲, IC E的 12脚接电阻 R118的一端, 电阻 R118的另一端接到集 成块 IC J的 1脚, IC J的 2、 3脚与电容 C11的一端相联 , 电容 C11与电阻 R49、 电位器 R103的一端联接, 电阻 R49与电位器 R103分别接 IC J的 4、 5脚, IC J的 6 脚接至其 9脚, 8脚、 11脚相联接, 其 10脚接到 IC F的 3脚, IC J的 1、 2接电源 部分输出 5的的 '+ ' DC电源, 7脚接地。 调节电位器 R103从而对工作点进行调节, 集成块 IC E的 7脚接电容 C12联接, 电容 C12的另一端接 IC A的 13脚, 输出电压 U 接至集成块 IC A的 3脚相位比较器的一个输入端, 与集成块 IC E第 8脚驱动脉冲进 行了频率与相位的锁定。 其中 IC A的 16脚接电源, 9脚与电容 Cl、 电阻 R2相联, 电阻另一端与电容 C7的一端相联, 电容 C7的另一端接地, IC A的其他脚悬空。
④负载过小检测:
该部分由传感器, 集成块 IC F、 电阻 R98、 R17、 R13、 R14、 R75、 R107、 R18、 电容 C42、 C16, 集成块 IC B组成。
IC F为 16脚的专用相位电压比较器, 其 1脚接电阻 R17的一端, R17与 R98串 联接地, 其 5、 8脚接地, 其 6、 7脚之间串接了电容 C42, 13与 9脚串接了电阻 R13, 10、 11、 12脚分别接电阻 R107、 R75、 R14的一端, R107、 R75、 R14的另一端接地, IC F的 14脚接至传感器的采样电路。
IC B的 1、 2脚相联接至电阻 R5的一端, R5的另一端接 R3, R3的另一端与 R8、 R9、 C21的一端相联接, 电容 C21的另一端接地。 IC B的 3脚与电阻 R10联接, 电阻 R10的另一端接至 IC A的 9脚。 IC B的 4接电源部分输出 5的的 '+' DC电源, 电 源部分输出 5的的 '+ ' DC接 R11的一端, R11的另一端接 5脚, 电容 C20的一端接 IC B的 5脚, 另一端接地, 电阻 R12与电容 C39串联后, 电阻 R12的另一端接 IC B 的 6、 7脚, 电容 C39的另一端接地, 电容 C36与电阻 R4串联后, 电阻 R4的另一端 接 IC B的 14脚, 电容 C36的另一端接地。 IC B的 13与 14脚之间串接了电阻 R6, IC B的 12脚接电阻 R7的一端, R7的另一端, 接电容 C19、 R18的一端, 电容 C19另 一端接地, 电阻 R8的另一端与 R9相联接。
经过传感器对功率输出部分进行电压及相位采样, 经过集成块 IC F的 14脚比较 后, 进行电压及相位的锁定, 若采样的电压高, 负载过小保护起作用, 主机不工作, 指示灯 LED 1闪烁。
⑤负载过大检测:
该部分由传感器, 集成块 IC F、 电阻 R98、 R17、 R13、 R14、 R75、 R107、 R18、 电容 C42、 C16, 集成块 IC K组成, IC F为 16脚的相位电压比较器, 其 1脚接电阻 R17的一端, R17与 R98串联接地, 其 5、 8脚接地, 其 6、 7脚之间串接了电容 C42, 13与 9脚串接了电阻 R13, 10、 11、 12脚分别接电阻 R107、 R75、 R14的一端, R107、 R75、 R14的另一端接地, IC F的 14脚接至传感器的采样电路。
IC B的 1、 2脚相联接至电阻 R5的一端, R5的另一端接 R3, R3的另一端与 R8、 R9、 C21的一端相联接, 电容 C21的另一端接地; IC B的 3脚与电阻 R10联接, 电阻 R10的另一端接至 IC A的 9脚; IC B的 4接 DC电源, DC接 R11的一端, R11的另 一端接 5脚, 电容 C20的一端接 IC B的 5脚, 另一端接地, 电阻 R12与电容 C39串 联后, 电阻 R12的另一端接 IC B的 6、 7脚, 电容 C39的另一端接地, 电容 C36与电 阻 R4串联后, 电阻 R4的另一端接 IC B的 14脚, 电容 C36的另一端接地; IC B的 13与 14脚之间串接了电阻 R6, IC B的 12脚接电阻 R7的一端, R7的另一端, 接电 容 C19、 R18的一端, 电容 C19另一端接地, 电阻 R8的另一端与 R9相联接。
IC K的 1、 2脚与电阻 R114相联, R114的另一端与电容 C23、 电阻 R76相联, 电 容 C23的另一端接地, IC K的 3脚与电阻 R68相联, R68的另一端与电容 C6、 电阻 R72联接, 电容 C6的另一端接地, R72的另一端与电容 C32相联至 IC F的 10脚, 电 容 C32的另一端接地, IC K的 4脚为电源输入端, 其 5脚与 R72相联接, R72的另一 端接至电容 C33及 IC E的 2脚, 电容 C33的另端接地。 IC K的 6、 7脚、 电阻 R125、 电容 C35相联接, 电阻 R125与电阻 R80相联, R80与电容 C34的一端相联接, C34的 另一端接地, IC K的 8脚与电阻 R22、 R23相联, R22的另一端接二极管 D8, D8的另 一端接电阻 R26、 电阻 R81及 IC I的 11脚, R13的另一端接 LED, LED的另一端接地, IC K的 9脚接电阻 R70, 10的另一端与电容 C47、 电阻 R69相联接, 电容 C47的另 一端接地, R69的另一端与电容 C37、 电阻 R45相联接至 IC K的 12脚, 电阻 R45与 电容的 C37的另一端接地, IC K的 11脚为接地端, IC K的 14脚与二极管 D7相联接, D7的另一端接至电阻 R81与二极管 D8的联接端, 经过传感器对功率输出部分进行电 压及相位采样, 经过集成块 IC F比较后, 进行电压及相位的锁定, 若采样的电压低, 负载过大保护起作用, 主机不工作, 指示灯 A3闪烁。
⑥限压保护:
此部分由集成块 IC D、 IC G、 IC H、 IC I、 Ul 及传感器组成, 下面介绍一下各 部分外围电路联接关系。
采样电路接于 J4, J4的一端接地, 另一端与二极管 D10联接, D10的另一端接电 解电容 C10的 ' + '、 电容 C27、 电位器 R115的一端, 电容 C10、 C27、 电位器 R115的 另一端接地, 电位器的中点与 U1的 1脚相联, U1的 2脚接地, U1的 3脚接电源部分 输出 5的的 '+ ' , 4脚接电阻 R92后接至 IC D的 8脚。 R60与 R28串联后接至 IC K 的 1脚与 14脚之间, R93与 R29串联后接至 2脚与 13脚之间, R59与 R88串联后, 接至 IC D的 2、 4脚, IC D的 5脚, 接 R27的一端, R27的另一端与 R89、 C3相联, C3另一端接地, R89的另一端接 R86与 R34的联接点, IC D的 6脚与二极管 Dl、 D2、 电容 C15、 电阻 R52相联接, 电容 C15、 电阻 R52的另一端接地, 二极管 D1与 D2的 两端与传感器的相联, 56的一端与 IC的 9脚相联接,另一端接至电容 C10、电阻 R84、 R85的联接点, R58的一端与 IC的 11脚相联接, 另一端接至电容 Cl l、 电阻 R86、 R34 的联接点, IC D的 12脚接地。
电阻 R43接至 IC G的 1脚, 另一端接至 IC I的 2脚, 电阻 R44—端接至 IC G 的 2脚, 另一端接至 IC H的 4脚, IC G的 3脚接到电容 C22与 R35的联接点, 电容 C22接受电源, R35接地, IC G的 4脚接地, IC G的 5脚为电源输入端, IC G的 6 脚, 接电阻 R97, 电阻 R97的另一端接地, IC G的 7脚接电容 C26与电阻 R36的联接 点, 电阻的另一端接地, 电容的另一端接电源, IC G的 8脚接地, 电阻 R40—端接 IC G的 9脚, 另一端接 IC H的 3脚, 电阻 R39—端接 IC G的 10脚, 另一端接 IC H 的 1脚, IC G的 11脚接至电容 C18与 R32的联接点, 电容 C18的另一端接电源, 电 阻 R32的另一端接地, 电阻 R94接 IC G的 12脚, 另一端接地, IC G的 13悬空, IC G 的 14脚接地, IC G的 15脚接至电阻 R31与电容 C17的联接点, 电容 C17另一端接电 源, 电阻 R31的另一端接地。 IC G的 16脚为电源输入端。
IC H的 2脚与 IC I的 10相联接, IC H的 5、 7脚接地, IC H的 6脚、 8脚相联 接, 电阻 R41、 R61与 IC H的 8脚联接, 电阻 R41的另一端接地, 电阻 R61的另一端 与电容 C24相联, 电容 C24另一端接地。 IC H的 10、 12相联接, IC H的 11、 13脚 相联接, IC H的 14脚为电源的输入端。 IC I的 7、 8脚接地, 9、 13脚相联接, 14 脚为电源的输入端。
经过传感器对整流后的电压进行采样, 采样后经整流滤波取得电压 , 当 增加 到一定程度时, 光耦 U1的导通, 集成块 IC D、 IC G、 IC H、 IC I 组成的保护电路起 作用, 从而限压保护起作用, 主机处于限压保护状态, 主机仍然正常工作。
⑦限流保护:
该部分由集成块 IC C、 IC G、 IC H、 IC I及传感器电流采样构成, 传感器的电 流采样线圈与 J1的 1、 2相联接后,经全桥整流后,联接于电位器 R102的 1端, R102 的 3端与地联接, R102的 2端接于电阻 R51与电容 C13的联接点, C13的另一端接地, R51与 IC C的 4脚相联接, 电阻 R54与 IC C的 5脚相联接, 另一端接于电阻 R55与 R82的联接点, R55的另一端接电源, R82的另一端接地。 IC C的 3脚电源输入端, 电阻 R48—端接于 IC C的 2脚, 另一端接于 IC C的 4脚, IC C的 2脚与电阻 R25、 R26与电容 C8的联接点联接, R25的另一端接电源, 电阻 R26与电容 C8的另一端接 地。 经过传感器对电流进行采样, 全波整流后, 采样后经过电位器 R102 与基准电压 进行比较, 当调节电位器 R102时, 经过集成块 IC C进行比较, 若采样的电流信号过 大, 限流保护起作用, 主机处于限流保护状态, 主机仍然正常工作。
⑧软启动部分:
软启动部分由 IC E 内部集成与外部有电容 C45构成, C45的 '+' 与 IC E的 6 脚联接, C45的 '-' 接地, IC E的 6脚在集成的电路, 对外部电容 C45进行了充放 电的过程, 在 IC E的 6脚形成了锯齿波, C45电容容量选择要适当, 以避免启动过快 或过缓。
⑨温度保护:
温度保护由温控开关 J3、 集成块 IC G、 IC H、 IC I构成, 温控开关 J3—端接电 源, 另一端接二极管 D9, D9的另一端接电阻 R81与二极管 D8的联接点, 当功率部分 的温度过高时, 温度开关处于导通状态, 此时, 温度保护电路工作, 指示灯 A4亮, 主机处于温度保护状态, 主机不工作。
二、 功率部分:
①核心部分:
该核心部分由功率管 IGBT的全桥组成, 三相电 A、 B、 C接至三相全桥 D的输入 端, 整流后, 整流桥的 ' + ' 与电抗器一端联接, 电抗器的另一端与串联的滤波电容 C1和 C2, C3和 C4, C5和 C6的 '+, 相联, C2、 C4、 C6的 '_' 接至整流桥的 ' -,, 功率管 Q1的 E极和 Q2的 Q极、 Q3的 E极和 Q4的 Q极串接后分别接至 Ql、 Q3的 Q 极和 Q2、 Q4的 E极分别与三相整流桥的 '+, 与 '-, 联接, 负载一端接至 Q1的 E极, 另一端接至传感器, 传感器的另一端接 Q3的 E极, 通过电抗器进行无功功率补偿及 谐波的处理,从而改善了功率因数,大大的减少了无功功率,再经过电容 Cl、 C2、 C3、 C4、 C5、 C6滤波, 其核心部分为大功率的 IGBT全桥组成。
②传感器:
传感器集成了电流采样、 电流相位采样、 电压采样电路, 将其信息反馈到主控部 分上, 使主机正常工作。

Claims

权 利 要 求 书
1、 由主控部分与功率部分构成的一种感应加热电源电路, 其特征是: 主控部分有开关 电源及驱动部分、 振荡激励部分、 相位及电压锁定、 负载过小检测、 负载过大检测、 限压保 护、 限流保护、 软启动部分、 温度保护部分组成; 功率部分由全桥功率管组成的核心部分与 传感器组成;
一、 主控部分:
①开关电源及驱动部分:
市电 AC经过 R12及电阻 Rl l, 联接到电容 C11的两端及共模电感 T1两端, 共模电感 T1 的另外两端接至电容 C12两端, 再联接到整流桥 B, 整流桥 B正极与电解电容 C4的正极相联 接,整流桥 B的负极与电解电容 C4的负极相联接至热地,电阻 R3与电解电容 C4的两端相联、 电容 C5、 电阻 R3与齐纳二极管 D5的一端相联接接至变压器 T2的初级绕组, 另一端相联接 至二极管 D4, 二极管 D4的另一端接至变压器 T2初级绕组的另一端, 接至开关管 U1的 3脚, 开关变压器 T1的 DC次级绕组一端接到二极管 D6, 二极管 D6的一端接电解电容 C7的正极, 开关变压器的 DC次级绕组的另一端为 DC冷地, 经过二极管 D6, 电容 C7、 电感 L2、 电解电 容 C8后, DC电压通过电阻 R15串接 R16, 经稳压二极管 TL431后, 通过电阻 R5、 R10, 电 容 C6反馈, 接至光耦 U2的 1脚, 反馈绕组的一端接至热地, 另一端接到二极管 D2的一端, D2的另一端接到 U2的 3脚, U2的 4脚, 接到电解电容 C15的正极及电容 C9的一端, 接到开 关管 U1的 2脚, 电解电容 C15的负极与电阻 R9相联接, R9与 C9的另一端接至热地, 次级 绕组 I的一端接至二极管 D11的一端, D11的另一端接电感 L1的一端, L1的另一端接电解电 容 C2的正极、 Cl、 R1的一端, 变压器的该绕组的另一端与 C2的负极、 C1及 R1的另一端相 联,次级绕组 I I的一端接至二极管 D12的一端, D12的另一端接电感 L12的一端, L12的另一 端接电解电容 C22的正极、 C32、 R32的一端, 变压器的该绕组的另一端与 C22的负极、 C32 及 R32的另一端相联,次级绕组 I I I的一端接至二极管 D13的一端, D13的另一端接电感 L13 的一端, L31的另一端接电解电容 C32的正极、 C23、 R33的一端, 变压器的该绕组的另一端 与 C32的负极、 C23及 R33的另一端相联, 次级绕组 IV的一端接至二极管 D14的一端, D14 的另一端接电感 L14的一端, L14的另一端接电解电容 C34的正极、 C24、 R34的一端, 变压 器的该绕组的另一端与 C34的负极、 C24及 R34的另一端相联,再接电解电容 C3的正极及 U4 的 1脚输入端, U4的 3脚接电阻 R17、 二极管 D9的一端, 电阻 R17与二极管 D9的另一端接 到 U4的 2脚, 电解电容 C16的正极与 R18的一端与 U4的 2端, 电解电容 C16的负极与 R18 的一端接至 C12的负极端, 即该绕组的冷地端, 输出 4组的直流电压, 四组电压经过由集成 块 U4及电阻 R17、 R18、二极管 D9组成的外部稳压电路,将四组的脉冲通过 IGBT芯片 U3后, 分别与功率板的驱动 1、 驱动 2、 驱动 3、 驱动 4相联接; ②振荡激励部分:
振荡激励部分由集成块 IC E的 20脚接地, IC E的 19脚接电容 C40的一端, 另一端接 地, IC E的 18脚接、 R105、 R64、 R83的一端, R105的另一端接地, R64、 R83的另一端相联 后, 接光耦 U2的 3脚, U2的 4脚接地, IC E的 17脚接 R109, R109另端接地, IC E的 15 脚接 R106, R106的另一端接地, IC E的 9脚接电阻 R124, R124的另一端接电源部分输出 5 的正极, 电解电容 C46的正极接电源部分输出 5的正极, C46的负极接地, IC E的 4脚接电 容 C29, C29的另一端与地相联接, IC E的 5脚与电阻 R108联接, R108的另一端与地相联接, IC E的 3脚与电阻 R100相联, R100的另一端与地相联接, 二极管 D5—端与 IC E的 2脚相 联, 另一端与电阻 R37相联接, R37的另一端与地相联接, IC E的 7、 8、 12、 13脚输出四 组驱动波形, IC E的 7脚与 IC A的 3脚相联接, IC E的 12脚与电阻 R113相联, R113的另 一端与 IC J的 1脚相联接, IC E的 6脚接 U5的 3脚, U5的 2、 4脚接地, U5的 1脚与 D6 和 R46的联接点相联接;
③相位及电压锁定:
集成块 IC E的 12脚接电阻 R118的一端, 电阻 R118的另一端接到集成块 IC J的 1脚, IC J的 2、 3脚与电容 C11的一端相联 , 电容 C11与电阻 R49、 电位器 R103的一端联接, 电 阻 R49与电位器 R103分别接 IC J的 4、 5脚, IC J的 6脚接至其 9脚, 8脚、 11脚相联接, 其 10脚接到 IC F的 3脚, IC J的 1、 2接 DC电源, 7脚接地; 调节电位器 R103, 集成块 IC E的 7脚接电容 C12联接, 电容 C12的另一端接 IC A的 13脚, 输出电压 U接至集成块 IC A 的 3脚相位比较器的一个输入端, 与集成块 IC E第 8脚锁定; 其中 IC A的 16脚接电源, 9 脚与电容 Cl、 电阻 R2相联, 电阻另一端与电容 C7的一端相联, 电容 C7的另一端接地, IC A 的其他脚悬空;
④负载过小检测:
集成块 IC F的 1脚接电阻 R17的一端, R17与 R98串联接地, IC F的 5、 8脚接地, IC F 的 6、 7脚之间串接了电容 C42, 13与 9脚串接了电阻 R13, 10、 11、 12脚分别接电阻 R107、 R75、 R14的一端, R107、 R75、 R14的另一端接地, IC F的 14脚接至传感器的采样电路; 集成块 IC B的 1、 2脚相联接至电阻 R5的一端, R5的另一端接 R3, R3的另一端与 R8、 R9、 C21的一端相联接, 电容 C21的另一端接地; IC B的 3脚与电阻 R10联接, 电阻 R10的 另一端接至 IC A的 9脚; IC B的 4接 DC电源, DC接 R11的一端, R11的另一端接 5脚, 电容 C20的一端接 IC B的 5脚, 另一端接地, 电阻 R12与电容 C39串联后, 电阻 R12的另一 端接1 8的6、 7脚, 电容 C39的另一端接地, 电容 C36与电阻 R4串联后, 电阻 R4的另一 端接 IC B的 14脚, 电容 C36的另一端接地; IC B的 13与 14脚之间串接了电阻 R6, IC B 的 12脚接电阻 R7的一端, R7的另一端, 接电容 C19、 R18的一端, 电容 C19另一端接地, 电阻 R8的另一端与 R9相联接;
⑤负载过大检测:
集成块 IC F的 1脚接电阻 R17的一端, R17与 R98串联接地, IC F的 5、 8脚接地, IC F 的 6、 7脚之间串接了电容 C42, 13与 9脚串接了电阻 R13, 10、 11、 12脚分别接电阻 R107、 R75、 R14的一端, R107、 R75、 R14的另一端接地, IC F的 14脚接至传感器的采样电路; 集成块 IC B的 1、 2脚相联接至电阻 R5的一端, R5的另一端接 R3, R3的另一端与 R8、 R9、 C21的一端相联接, 电容 C21的另一端接地; IC B的 3脚与电阻 R10联接, 电阻 R10的 另一端接至 IC A的 9脚; IC B的 4接 DC电源, DC接 R11的一端, R11的另一端接 5脚, 电容 C20的一端接 IC B的 5脚, 另一端接地, 电阻 R12与电容 C39串联后, 电阻 R12的另一 端接 8的6、 7脚, 电容 C39的另一端接地, 电容 C36与电阻 R4串联后, 电阻 R4的另一 端接 IC B的 14脚, 电容 C36的另一端接地; IC B的 13与 14脚之间串接了电阻 R6, IC B 的 12脚接电阻 R7的一端, R7的另一端, 接电容 C19、 18的一端, 电容 C19另一端接地, 电阻 R8的另一端与 R9相联接;
集成块 IC K的 1、 2脚与电阻 R114相联, R114的另一端与电容 C23、 电阻 R76相联, 电 容 C23的另一端接地, IC K的 3脚与电阻 R68相联, R68的另一端与电容 C6、 电阻 R72联接, 电容 C6的另一端接地, R72的另一端与电容 C32相联至 IC F的 10脚, 电容 C32的另一端接 地, IC K的 4脚为电源输入端, 其 5脚与 R72相联接, R72的另一端接至电容 C33及 IC E的 2脚, 电容 C33的另端接地; IC K的 6、 7脚、 电阻 R125、 电容 C35相联接, 电阻 R125与电 阻 R80相联, R80与电容 C34的一端相联接, C34的另一端接地, IC K的 8脚与电阻 R22、 R23 相联, R22的另一端接二极管 D8, D8的另一端接电阻 R26、 电阻 R81及 IC I的 11脚, R13 的另一端接 LED, LED的另一端接地, IC K的 9脚接电阻 R70, R10的另一端与电容 C47、 电 阻 R69相联接, 电容 C47的另一端接地, R69的另一端与电容 C37、 电阻 R45相联接至 IC K 的 12脚, 电阻 R45与电容的 C37的另一端接地, IC K的 11脚为接地端, IC K的 14脚与二 极管 D7相联接, D7的另一端接至电阻 R81与二极管 D8的联接端;
⑥限压保护:
该部分由集成块 IC D、 IC G、 IC H、 IC I、 Ul 及传感器组成, 采样电路接于 J4, J4的 一端接地, 另一端与二极管 D10联接, D10的另一端接电解电容 C10的正极、 电容 C27、 电位 器 R115的一端, 电容 C10、 C27、 电位器 R115的另一端接地, 电位器的中点与 U1的 1脚相 联, U1的 2脚接地, U1的 3脚接, 4脚接电阻 R92后接至 IC D的 8脚; R60与 R28串联后接 至 IC K的 1脚与 14脚之间, R93与 R29串联后接至 2脚与 13脚之间, R59与 R88串联后, 接至 IC D的 2、 4脚, IC D的 5脚, 接 R27的一端, R27的另一端与 R89、 C3相联, C3另一 端接地, R89的另一端接 R86与 R34的联接点, IC D的 6脚与二极管 Dl、 D2、 电容 C15、 电 阻 R52相联接, 电容 C15、 电阻 R52的另一端接地, 二极管 D1与 D2的两端与传感器的相联, R56的一端与 IC的 9脚相联接, 另一端接至电容 C10、 电阻 R84、 R85的联接点, R58的一端 与 IC的 11脚相联接, 另一端接至电容 Cl l、 电阻 R86、 R34的联接点, IC D的 12脚接地; 电阻 R43接至 IC G的 1脚, 另一端接至 IC I的 2脚, 电阻 R44—端接至 IC G的 2脚, 另一端接至 IC H的 4脚, IC G的 3脚接到电容 C22与 R35的联接点, 电容 C22接受电源, R35接地, IC G的 4脚接地, IC G的 5脚为电源输入端, IC G的 6脚, 接电阻 R97, 电阻 R97 的另一端接地, IC G的 7脚接电容 C26与电阻 R36的联接点, 电阻的另一端接地, 电容的另 一端接电源, IC G的 8脚接地, 电阻 R40—端接 IC G的 9脚, 另一端接 IC H的 3脚, 电阻 R39一端接 IC G的 10脚, 另一端接 IC H的 1脚, IC G的 11脚接至电容 C18与 R32的联接 点, 电容 C18的另一端接电源, 电阻 R32的另一端接地, 电阻 R94接 IC G的 12脚, 另一端 接地, IC G的 13悬空, IC G的 14脚接地, IC G的 15脚接至电阻 R31与电容 C17的联接点, 电容 C17另一端接电源, 电阻 R31的另一端接地; IC G的 16脚为电源输入端;
集成块 IC H的 2脚与 IC I的 10相联接, IC H的 5、 7脚接地, IC H的 6脚、 8脚相联 接, 电阻 R41、 R61与 IC H的 8脚联接, 电阻 R41的另一端接地, 电阻 R61的另一端与电容 C24相联, 电容 C24另一端接地; IC H的 10、 12相联接, IC H的 11、 13脚相联接, IC H的 14脚为电源的输入端; IC I的 7、 8脚接地, 9、 13脚相联接, 14脚为电源的输入端;
⑦限流保护- 该部分由集成块 IC C、 IC G、 IC H、 IC I及传感器电流采样构成, 传感器的电流采样线 圈与 J1的 1、 2相联接后, 联接于电位器 R102的 1端, R102的 3端与地联接, R102的 2端 接于电阻 R51与电容 C13的联接点, C13的另一端接地, R51与 IC C的 4脚相联接, 电阻 R54 与 IC C的 5脚相联接, 另一端接于电阻 R55与 R82的联接点, R55的另一端接电源, R82的 另一端接地 ; IC C的 3脚电源输入端, 电阻 R48—端接于 IC C的 2脚, 另一端接于 IC C 的 4脚, IC C的 2脚与电阻 R25、 R26与电容 C8的联接点联接, R25的另一端接电源, 电阻 R26与电容 C8的另一端接地;
⑧软启动部分- 软启动部分由 IC E 内部集成与外部由电容 C45构成, C45的正极与 IC E的 6脚联接, C45的负极接地;
⑨温度保护:
温度保护由温控开关 J3、 集成块 IC G、 IC H、 IC I构成, 温控开关 J3—端接电源, 另 一端接二极管 D9, D9的另一端接电阻 R81与二极管 D8的联接点;
二、 功率部分:
① 核心部分: 该核心部分由功率管 IGBT的全桥组成, 三相电 A、 B、 C接至三相全桥 D的输入端的整流 桥, 整流桥的正极与电抗器一端联接, 电抗器的另一端与串联的滤波电容 C1和 C2, C3和 C4, C5和 C6的正极相联, C2、 C4、 C6的负极接至整流桥的负极, 功率管 Q1的 E极和 Q2的 Q极、 Q3的 E极和 Q4的 Q极串接后分别接至 Ql、 Q3的 Q极和 Q2、 Q4的 E极分别与三相整流桥的 正极与负极联接, 负载一端接至 Q1的 E极, 另一端接至传感器, 传感器的另一端接 Q3的 E 极;
②传感器:
传感器集成了电流采样、 电流相位采样、 电压采样电路。
2、根据权利要求 1所述的一种感应加热电源电路 , 其特征是: 所述的振荡激励部分集成 块 IC E 的 20脚为控制芯片, 集成块 IC E的 16、 10 J脚为电源输入端。
3、根据权利要求 1所述的一种感应加热电源电路 , 其特征是: 所述的负载过小检测的集 成块 IC F为 16脚的锁相环。
4、根据权利要求 1所述的一种感应加热电源电路, 其特征是: 所述的负载过大检测的集 成块 IC F为 16脚的锁相环。
5、根据权利要求 1所述的一种感应加热电源电路, 其特征是: 所述的核心部分的电抗器 为无功功率补偿的电感。
6、根据权利要求 1所述的一种感应加热电源电路, 其特征是: 所述的传感器的采样为采 样线圈。
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CN109308025A (zh) * 2018-10-25 2019-02-05 郑州跃博汽车电器有限公司 一种带电源分配的bcm控制器
CN111708301A (zh) * 2020-06-23 2020-09-25 大连华录国正产业有限公司 多功能空气净化器的电气控制系统
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