阅读说明：本技术 一种用于可控硅感应加热电源逆变器的逆变驱动 (A kind of inversion driving for silicon-controlled induction heating power inverter ) 是由 杨帆 于 2019-09-27 设计创作，主要内容包括：一种用于可控硅感应加热电源逆变器的逆变驱动,包括两个光纤信号接收器和一个MOS驱动芯片,两个光纤信号接收器均与MOS驱动芯片的输入接口连接,MOS驱动芯片的输出接口上连接有两个MOS管,用于分别接收两个光纤信号接收器所传输并转换后的MOS驱动信号,其中一个MOS管与A1驱动电路和A2驱动电路同时连接,使A1驱动电路和A2驱动电路能够同步导通,另一个MOS管与B1驱动电路和B2驱动电路同时连接,使B1驱动电路和B2驱动电路能够同步导通,两个MOS管分别接收的MOS驱动信号为两路相互反向的MOS驱动信号,使两个MOS管能够交替导通,从而使A1驱动电路、A2驱动电路与B1驱动电路、B2驱动电路之间能够交替导通,就能控制逆变器主电路中的四个可控硅交替导通以实现逆变。(A kind of inversion driving for silicon-controlled induction heating power inverter, including two fiber-optic signal receivers and a MOS driving chip, two fiber-optic signal receivers are connect with the input interface of MOS driving chip, there are two metal-oxide-semiconductors for connection on the output interface of MOS driving chip, for receiving the MOS driving signal after two fiber-optic signal receivers are transmitted and converted respectively, one of metal-oxide-semiconductor is connect simultaneously with A1 driving circuit and A2 driving circuit, enable the conducting synchronous with A2 driving circuit of A1 driving circuit, another metal-oxide-semiconductor is connect simultaneously with B1 driving circuit and B2 driving circuit, enable the conducting synchronous with B2 driving circuit of B1 driving circuit, it is the mutually opposing MOS driving signal of two-way that two metal-oxide-semiconductors, which distinguish received MOS driving signal, make two Metal-oxide-semiconductor can alternate conduction, thus make between A1 driving circuit, A2 driving circuit and B1 driving circuit, B2 driving circuit can alternate conduction, can control four in converter main circuit silicon-controlled alternate conductions just to realize inversion.)

1. a kind of inversion for silicon-controlled induction heating power inverter drives, including for controlling in converter main circuit The A1 driving circuit of the conducting of controllable silicon SCR 1, the A2 driving electricity for controlling the conducting of the controllable silicon SCR 2 in converter main circuit Road, for control the controllable silicon SCR 3 in converter main circuit conducting B1 driving circuit and for controlling the main electricity of inverter The B2 driving circuit that controllable silicon SCR 4 in road is connected, it is characterised in that: further include two fiber-optic signal receivers and an energy Enough MOS driving chips that fiber-optic signal is converted to MOS driving signal, two fiber-optic signal receivers with MOS driving chip Input interface connection, there are two metal-oxide-semiconductors for connection on the output interface of MOS driving chip, for receiving two optical fiber letters respectively Number receiver transmit and convert after MOS driving signal, one of metal-oxide-semiconductor and A1 driving circuit and A2 driving circuit are simultaneously Connection enables the conducting synchronous with A2 driving circuit of A1 driving circuit, another metal-oxide-semiconductor and B1 driving circuit and B2 driving circuit It connects simultaneously, enables the conducting synchronous with B2 driving circuit of B1 driving circuit, two metal-oxide-semiconductors distinguish received MOS driving signal For the mutually opposing MOS driving signal of two-way, enable two metal-oxide-semiconductor alternate conductions, to make A1 driving circuit, A2 driving electricity It being capable of alternate conduction between road and B1 driving circuit, B2 driving circuit.

2. a kind of inversion for silicon-controlled induction heating power inverter according to claim 1 drives, feature exists It include a transformer, transformer in: the A1 driving circuit, A2 driving circuit, B1 driving circuit, B2 driving circuit Input coil on be connected with driving current-limiting resistance, freewheeling path is also connected on the input coil of transformer, on freewheeling path It is connected with continued flow resistance and freewheeling diode, is connected with filtered diode and filter capacitor on the output winding of transformer, makes to become The output signal of depressor is transferred to silicon-controlled after filtering.

3. a kind of inversion for silicon-controlled induction heating power inverter according to claim 2 drives, feature exists In: driving signal indicator light and indicator light current-limiting resistance are parallel on the output winding of the transformer.

4. a kind of inversion for silicon-controlled induction heating power inverter according to claim 2 drives, feature exists In: the transformer uses KCB2410G pulse transformer.

5. a kind of inversion for silicon-controlled induction heating power inverter according to claim 1 drives, feature exists In: the fiber-optic signal receiver uses HFBR-2531 fiber-optic signal receiver.

6. a kind of inversion for silicon-controlled induction heating power inverter according to claim 1 drives, feature exists In: the MOS driving chip uses MAX4426 driving chip.

7. a kind of inversion for silicon-controlled induction heating power inverter according to claim 1 drives, feature exists In: the metal-oxide-semiconductor uses IRF530N field-effect tube.

Technical field

The present invention relates to inversion drive area more particularly to a kind of inversions for silicon-controlled induction heating power inverter Driving.

Background technique

Inversion, which refers to the process of, is transformed into alternating current direct current, and it by DC conversion is alternating current that inverter, which is a kind of, Device is widely used in air-conditioning, home theater, electric wheel, electric tool, sewing machine, DVD, VCD, computer, TV, laundry Machine, smoke exhaust ventilator, refrigerator, video recorder, massager, fan, illumination etc..In silicon-controlled induction heating power inverter, usually Connection is there are four silicon-controlled between DC power supply and load, its working principle is that by four it is silicon-controlled be divided into two groups, and control Two groups of silicon-controlled continuous alternate conductions and open circuit, i.e., when two conductings during four silicon-controlled, direct current can be flowed from load Cross, while another two is silicon-controlled in open circuit, and when another two is silicon-controlled synchronize be changed to conducting when, two of conducting are controllable originally Silicon is changed to open circuit in the same time, and direct current can still be flowed through from load, but flow direction with before on the contrary, passing through repetition This process can make constantly to flow through contrary direct current in load, be equivalent to make to have flowed through alternating current in load, from And realize the purpose inverteed direct current to alternating current.

In order to guarantee four silicon-controlled synchronous change on states as requested, need to connect on converter main circuit inverse Become and drive, in existing inversion driving, the reversed electric control pulse signal of two-way is sent by inverter master control borad respectively, two-way drives Dynamic signal send respectively into respective two driving chips and is converted, then send into respective metal-oxide-semiconductor and control leading for metal-oxide-semiconductor Logical state, i.e., two-way driving signal can be converted respectively in four driving chips send again to four metal-oxide-semiconductors, four metal-oxide-semiconductors As soon as controlling the conducting of an inverse changing driving circuit respectively, it can control four silicon-controlled conductings in inverter.This structure lacks Point is that two-way driving signal is all divided into two-way and is converted respectively, then is sent respectively to a field-effect tube, i.e., in total It needs to carry out four signal conversions and transmits respectively, and can have error during the conversion of each signal and transmission, it is existing The number for carrying out conversion to driving signal in structure and transmitting respectively is more, and accumulated error is also larger；Also, it is adopted in existing structure It is all automatically controlled driving signal, error of the automatically controlled signal in transmission and conversion process itself is also larger, leads to four metal-oxide-semiconductors When cooperation changes on off operating mode, there can be biggish error in time, inversion is made to drive uncontrollable four metal-oxide-semiconductors accurate On-off is carried out according to required time.Above-mentioned factor can all cause between four silicon-controlled make-and-break times in converter main circuit Can have large error, make load can not be stable acquisition needed for alternating current, reduce the stability of reversals.

Summary of the invention

To solve the problem of that above-mentioned existing inversion drives the larger reduction reversals stability of error, the present invention is provided A kind of inversion for silicon-controlled induction heating power inverter drives.

Used technical solution is the present invention to solve above-mentioned technical problem: one kind is for silicon-controlled induction heating power The inversion of inverter drives, including for controlling the conducting of the controllable silicon SCR 1 in converter main circuit A1 driving circuit, be used for Control the A2 driving circuit, silicon-controlled in converter main circuit for controlling that the controllable silicon SCR 2 in converter main circuit is connected The B1 driving circuit of SCR3 conducting and the B2 driving circuit be connected for controlling the controllable silicon SCR 4 in converter main circuit, It further include the MOS driving chip that fiber-optic signal can be converted to MOS driving signal by two fiber-optic signal receivers and one, two A fiber-optic signal receiver is connect with the input interface of MOS driving chip, is connected with two on the output interface of MOS driving chip A metal-oxide-semiconductor, for receiving the MOS driving signal after two fiber-optic signal receivers are transmitted and converted, one of MOS respectively Pipe is connect simultaneously with A1 driving circuit and A2 driving circuit, enables the conducting synchronous with A2 driving circuit of A1 driving circuit, another A metal-oxide-semiconductor is connect simultaneously with B1 driving circuit and B2 driving circuit, enables the conducting synchronous with B2 driving circuit of B1 driving circuit, It is the mutually opposing MOS driving signal of two-way that two metal-oxide-semiconductors, which distinguish received MOS driving signal, and two metal-oxide-semiconductors is enable to replace Conducting, so that making being capable of alternate conduction between A1 driving circuit, A2 driving circuit and B1 driving circuit, B2 driving circuit.

Preferably, the A1 driving circuit, A2 driving circuit, B1 driving circuit, include one in B2 driving circuit Transformer is connected with driving current-limiting resistance on the input coil of transformer, and it is logical that afterflow is also connected on the input coil of transformer Road is connected with continued flow resistance and freewheeling diode on freewheeling path, be connected on the output winding of transformer filtered diode and Filter capacitor is transferred to the output signal of transformer after filtering silicon-controlled.

Preferably, driving signal indicator light and indicator light current-limiting resistance are parallel on the output winding of the transformer.

Preferably, the transformer uses KCB2410G pulse transformer.

Preferably, the fiber-optic signal receiver uses HFBR-2531 fiber-optic signal receiver.

Preferably, the MOS driving chip uses MAX4426 driving chip.

Preferably, the metal-oxide-semiconductor uses IRF530N field-effect tube.

According to the above technical scheme, the beneficial effects of the present invention are:

Provided by the present invention for silicon-controlled induction heating power inverter inversion driving compared with existing structure, be all by inverse Become device master control borad and issue two-way driving signal, but a conversion process has all only been carried out to two-way driving signal in the present invention, And also all it is to be delivered to a respective metal-oxide-semiconductor respectively, controls the on-off of two driving circuits simultaneously by a metal-oxide-semiconductor, The number for making driving signal convert and transmit respectively is all reduced compared with existing structure, in conversion and transmission process Accumulated error can also reduce；Also, fiber-optic signal is used in the present invention as driving signal, fiber-optic signal is adopted with existing Automatically controlled signal is compared, and the error in transmission and conversion process is all smaller, can be reduced by four field-effect tube cooperations and be changed The time error of on off operating mode, to reduce the error between four silicon-controlled make-and-break times in converter main circuit, greatly The big consistency for improving driving signal, alternating current needed for making the acquisition of load stabilization improve the stability of reversals.

Detailed description of the invention

Fig. 1 is the schematic diagram of silicon-controlled induction heating power converter main circuit；

Fig. 2 is the schematic diagram of existing inverse changing driving circuit；

Fig. 3 is the schematic diagram of inverse changing driving circuit of the invention.

Specific embodiment

As shown in Figure 1, the principle for silicon-controlled induction heating power converter main circuit is illustrated, the current source in Fig. 1 is DC power supply, the converting direct-current power into alternating-current power for being exported DC power supply by thyristor inversion unit, then alternating current is provided To load, in order to realize inversion, four controllable silicon SCRs 1, SCR2, SCR3 and SCR4 are connected in thyristor inversion unit, And it is connected to driving circuit A1, A2, B1 and the B2 that can control four controlled silicon conductings respectively, four driving circuits are usually by inverse Become its on off operating mode of the master control borad coordinated control of device.

In inverter work, driving circuit A1 and A2 conducting are first controlled, controllable silicon SCR 1 and SCR2 are simultaneously turned on, electricity Stream will be flowed successively through controllable silicon SCR 1 by positive pole P+, load, controllable silicon SCR 2 finally flow back to power cathode N-, this process The direction that middle electric current passes through from load is to first pass through inductance L and pass through capacitor r again, i.e., in the loading section of Fig. 1 for from upper and Under；Then control driving circuit A1 and A2 open circuit simultaneously, and simultaneously turned in the control of same time driving circuit B1 and B2, it will Make controllable silicon SCR 1 and SCR2 open circuit simultaneously, and becomes controllable silicon SCR 3 and SCR4 in the same time of SCR1 and SCR open circuit Conducting, electric current will change in moment to be flowed to, and flows successively through controllable silicon SCR 3, load, controllable silicon SCR 4 most by positive pole P+ After flow back to power cathode N-, direction that electric current passes through from load during this is to first pass through capacitor r to pass through inductance L again, that is, is existed For from bottom to top in the loading section of Fig. 1.

Control above-mentioned two process continuously alternately, i.e. B1 and B2 open circuit when A1 and A2 are connected, then A1 and A2 be simultaneously Open circuit, and B1 and B2 is connected in the same time, then repeats again, it will be able to make continual in load to flow through direction phase Anti- electric current realizes and direct current is converted to the alternating current that direction constantly converts send to load, that is, realizes reversals.Figure 1 is the basic principle of converter main circuit, is sent again after usually also needing to be filtered the electric current after inversion etc. processing in practice To load.

In order to realize the control to driving circuit A1, A2, B1 and B2 on off operating mode, need to connect on converter main circuit Inversion driving, Fig. 2 are the schematic diagram of existing inverse changing driving circuit, and Fig. 3 is the schematic diagram of the inverse changing driving circuit of the present embodiment, In Fig. 2 and Fig. 3, ' 1 driving circuit A1, A2, B1, B2 and A, A ' 2, B ' 1, the structure of B ' 2 are all the same, in Fig. 3 For A1 driving circuit, mainly includes a KCB2410G pulse transformer T1, be connected with drive on the input coil of transformer T1 Current-limiting resistance R6 is moved, freewheeling path is also connected on the input coil of transformer T1, continued flow resistance R9 is connected on freewheeling path With sustained diode 11, lead to for providing of short duration afterflow when transformer T1 becomes open circuit from being connected for primary side induced voltage Road；Filtered diode D7 and filter capacitor C9, and the output winding of transformer T1 are connected on the output winding of transformer T1 It is connect by two ports G1 and K1 with the controllable silicon SCR 1 in Fig. 1, is transferred to the output signal of transformer T1 after filtering Controllable silicon SCR 1；Driving signal indicator light LED1 and indicator light current-limiting resistance R10 are also parallel on the output winding of transformer T1. The element that corresponding position connects in remaining driving circuit is identical as the effect of each element in A1 driving circuit.

As shown in Fig. 2, its signal receiving part point is connect with the master control borad of inverter, the automatically controlled drive of two-way is issued by master control borad Dynamic signal, wherein A ' driving signal and B ' driving signal are separately input into two MAX4426 driving chips, and automatically controlled driving is believed Number MOS driving signal is converted to, then MOS driving signal is sent to IRF530N field-effect tube, and is finally sent respectively to driving circuit A ' 1, A ' 2, B ' 1 and B ' 2.That is sent respectively in Fig. 2, after A ' driving signal is converted to IRF530N field-effect tube Q1 and Q2 is then sent to driving circuit A ' 1 and A ' 2, enables that A ' driving signal controls driving circuit A ' 1 simultaneously and A ' 2 is led It is logical；It is sent respectively after B ' driving signal is converted to IRF530N field-effect tube Q3 and Q4, is then sent to driving circuit B ' 1 and B ' 2, so that B ' driving signal is controlled driving circuit B ' 1 and B ' 2 simultaneously and is connected.

After the inversion of Fig. 2 is drivingly connected, the reversed electric control pulse of two-way is sent to A ' and B ' by master control borad respectively Signal, two-way driving signal is respectively after driving chip is converted, it will be able to guarantee to be connected as IRF530N field-effect tube Q1 and Q2 When, Q3 and Q4 are in open circuit, and when Q1 and Q2 become open circuit, Q3 and Q4 can become being connected in the same time, can make to drive Controllable silicon SCR 1, SCR2, SCR3 and SCR4 are led in alternate conduction between dynamic circuit A ' 1, A ' 2 and B ' 1, B ' 2, realization Disconnected control, to carry out reversals.But in Fig. 2, A ' driving signal and B ' driving signal be all divided into two-way and It is converted, then is sent respectively to a field-effect tube respectively, and can have error during the conversion of each signal and transmission, And A ' driving signal and B ' driving signal are all automatically controlled driving signals, and automatically controlled signal itself is in transmission and conversion process Error is also larger, when these factors result in four field-effect tube Q1, Q2, Q3 and Q4 cooperation change on off operating modes, in time There can be biggish error, make the inversion in Fig. 2 that uncontrollable four field-effect tube be driven accurately to carry out according to required time On-off leads to can have large error between four in converter main circuit silicon-controlled make-and-break times, makes load can not be steady Alternating current needed for fixed acquisition reduces the stability of reversals.

As shown in figure 3, the present embodiment includes two HFBR-2531 fiber-optic signal receiver RX1 and RX2 and energy Enough MAX4426 driving chip U4 that fiber-optic signal is converted to MOS driving signal, two fiber-optic signal receivers with driving core The input interface of piece connects, and there are two IRF530N field-effect tube Q2 and Q3 for connection on the output interface of driving chip, for distinguishing The MOS driving signal after two fiber-optic signal receivers are transmitted and converted is received, wherein field-effect tube Q2 and A1 driving circuit It is connected simultaneously with A2 driving circuit, enables the conducting synchronous with A2 driving circuit of A1 driving circuit, field-effect tube Q3 and B1 drive Circuit and B2 driving circuit connect simultaneously, enable the conducting synchronous with B2 driving circuit of B1 driving circuit.

The reversed fiber pulse letter of two-way is sent to two fiber-optic signals receiver RX1 and RX2 by inverter master control borad Number, so that two field-effect tube Q2 and Q3 is distinguished the mutually opposing MOS driving signal of received driving signal two-way, two field effects Should pipe Q2 and Q3 can alternate conduction, thus make A1 driving circuit, A2 driving circuit and B1 driving circuit, B2 driving circuit it Between can alternate conduction, realize to controllable silicon SCR 1, the on-off of SCR2, SCR3 and SCR4 control, to carry out reversals. Compared with the existing structure in Fig. 2, the road A driving signal and the road B driving signal all only have passed through primary converted in the present embodiment Journey, and the road A driving signal and the road B driving signal are also all to be delivered to a respective field-effect tube respectively, pass through a field Effect pipe controls the on-off of two driving circuits simultaneously, and driving signal is made to carry out the number and existing structure converting and transmit respectively Compared to being all reduced, the accumulated error in conversion and transmission process can also reduce；Also, light is used in the present embodiment Optical fiber signaling is as driving signal, error of the fiber-optic signal compared with the automatically controlled signal of existing use, in transmission and conversion process It is all smaller, the time error that four field-effect tube cooperations change on off operating mode can be reduced, to reduce in converter main circuit Four silicon-controlled make-and-break times between error, measurement error is about 5ns, and measured time error is about in existing structure For 20ns, improved error time is original 1/4, greatly improves the consistency of driving signal, makes the acquisition of load stabilization Required alternating current improves the stability of reversals.