CN2817204Y

CN2817204Y - Synchronous control resonance type power converter

Info

Publication number: CN2817204Y
Application number: CN 200420086834
Authority: CN
Inventors: 陶顺祝
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-30
Filing date: 2004-07-30
Publication date: 2006-09-13
Anticipated expiration: 2014-07-30

Abstract

The utility model relates to a synchronous control resonant type power converter, which is composed of a resonant type power converting device, a synchronous pulse detecting circuit, a resonant energy replenishing circuit, a V/F voltage controlled converting circuit, and a firing pulse detecting circuit. An auxiliary winding is added to a resonant inductor Lr; voltage coupling signals of the resonant inductor Lr is taken out, and an output terminal of the resonant inductor Lr is connected with an input terminal of an or gate circuit after being rectified by using a rectifier; an output ends of a voltage controlled oscillator is connected with another input terminal of the or gate circuit; a transient state synchronous control ring of the resonant type power converting device can be formed by connecting an output terminal of the or gate circuit with an external timing element of the voltage controlled oscillator. A transient state concurrent control function is added to the resonant type power converting device on the basis of low electromagnetic interference and high efficiency of the resonant type power converting device, and the reliability problem of the resonant type power converting device under the boundary conditions can be solved.

Description

Synchronization Control mode of resonance power inverter

Technical field

The utility model relates to a kind of resonance type power converter, particularly a kind of Synchronization Control mode of resonance power inverter and technical scheme thereof.

Background technology

Existing resonance type power converter is to adopt traditional univoltage ring control technology, though the resonance type power converter has high efficiency, low electromagnetic interference, circuit is controlled simple advantage, as shown in Figure 1, by resonance type power converting means 1 ', error amplifier 2 ', V/F voltage controlled oscillator 3 ' and phase splitter 4 ' constitute the mode of resonance power inverter, output by error amplifier 2 ' links to each other with the input control end of V/F voltage controlled oscillator 3 ', the output of V/F voltage controlled oscillator 3 ' links to each other with the input of phase splitter 4 ', the output of phase splitter 4 ' meets two main switch K1 of resonance type power converting means 1 ' respectively, the K2 control end, two inputs of error amplifier 2 ' connect the output of default reference voltage and resonant mode power conversion unit 1 ' respectively and constitute the output voltage control loop, work as output voltage V ₀During variation, the frequency of the error voltage signal regulation and control V/F voltage controlled oscillator 3 ' that error amplifier 2 ' output is amplified realizes the stable of output voltage, but because the error voltage input signal of its error amplifier 2 ' is the integrated value of the output end voltage of resonance type power converting means 1 ', so the control system reaction speed is very slow, can not accomplish the transient state of resonance type power converting means 1 ' is controlled immediately; On this traditional resonance type power converter basis, modified forms such as resonance voltage controlled power converter have appearred again in recent years, analyze in theory can not solve the resonance type power converter by zero load at full capacity, in the transient state transfer process that changes to zero load and busbar voltage at full capacity, control system is to the instant Synchronization Control of power conversion unit 1 ', make resonance type power converter main switch power tube K1, K2 no-voltage, the forfeiture of zero current condition, off resonance, intermittency, the problem that the initiating system reliability is low occur.

Summary of the invention

When the utility model is worked under boundary condition at mode of resonance power inverter of the prior art exactly, the transition factor makes power conversion unit the problem that system is out of control, reliability is low occur, a kind of stability that guarantees to export with traditional output voltage control ring is provided, improves the Synchronization Control mode of resonance power inverter and the technical scheme thereof of system reliability with the transient state Synchronization Control ring of setting up.

Technical solution adopted in the utility model is: this Synchronization Control mode of resonance power inverter, and it is by resonance type power converting means 1, lock-out pulse testing circuit 2, resonant energy supplementary circuitry 3, the voltage-controlled translation circuit 4 of V/F and open pulse-detecting circuit 5 and constitute; The resonance potential ULr that lock-out pulse testing circuit 2 is searched and will be searched on the reflection resonance type power converting means resonant inductance Lr extracts formation Synchronization Control pulse Uk, the peripheral hardware timing element of the voltage-controlled translation circuit 4 of output termination V/F of lock-out pulse testing circuit 2; Two inputs of lock-out pulse testing circuit 2 connect the output of voltage controlled oscillator 42 and the output of rectifier 21 respectively, and voltage coupling winding 23 connects the input of rectifier 21; Its output termination busbar voltage of resonant energy supplementary circuitry, open the voltage-controlled translation circuit 4 of input termination V/F of pulse-detecting circuit 5 two outputs, open the reset terminal of the output termination resonant energy supplementary circuitry 3 of pulse-detecting circuit 5, the output of secondary current coupler connects the input of resonant energy supplementary circuitry 3, constitutes the transient state Synchronization Control ring of mode of resonance power conversion unit; The output that the control end of two groups of main switches of the output termination resonance type power converting means 1 of the voltage-controlled translation circuit 4 of V/F, two inputs of the voltage-controlled translation circuit 4 of V/F connect default reference voltage V f and resonant mode power conversion unit 1 respectively constitutes traditional output voltage control ring.

Lock-out pulse testing circuit 2 of the present utility model is made of voltage coupling winding 23 and rectifier 21, OR circuit 22; Voltage coupling winding 23 connects the input of rectifier 21, an input of the output termination OR circuit 22 of rectifier 21, and another input of OR circuit 22 links to each other with the output of voltage controlled oscillator 42.

Voltage coupling winding 23 of the present utility model is to go up the auxiliary winding that increases by resonant inductance Lr to constitute.

Resonant energy supplementary circuitry 3 of the present utility model is to increase resonant energy to replenish winding 33 and its latter linked rectifier 34, electronic switch K3 and secondary current coupler, signal processor 32 formations on resonance type power converting means resonant tank main transformer.

Signal processor 32 of the present utility model is to be made of rectifier, the integral transformation device that has electronic switch and its latter linked comparator; Electronic switch controling end in its integral transformation device promptly constitutes the reset terminal of signal processor 32.

The pulse-detecting circuit 5 of opening of the present utility model is OR circuit.

The voltage-controlled translation circuit 4 of V/F of the present utility model is made of voltage controlled oscillator 42, phase splitter 43, error amplifier 41, voltage controlled oscillator 42 is made pulse signal source, and the peripheral hardware timing element of voltage controlled oscillator 42 promptly constitutes the peripheral hardware timing element of the voltage-controlled translation circuit 4 of V/F.

The utility model design philosophy and operation principle are: take out voltage coupled signal ULr such as Fig. 4 a from voltage coupling winding 23, connect an input of OR circuit 22 through its output of rectifier 21 rectifications; The output waveform of voltage controlled oscillator 42 such as Fig. 4 b, another input of its output termination OR circuit 22, the peripheral hardware timing element of the output termination voltage controlled oscillator 42 of OR circuit 22; Resonant energy replenishes winding 33 through rectifier 34 rectifications, and its output connects the busbar voltage two ends by electronic switch K3; Open two outputs of pulse-detecting circuit 5 input termination phase splitters 43, open the reset terminal of pulse-detecting circuit 5 output termination signal processors 32; Current transducer 31 tape splicings have the input of the signal processor 32 of rectifier, the control end of signal processor 32 output termination electronic switch K3; When the transient state factor is undergone mutation the resonance loop energy, the instant output control pulse of the output of OR circuit 22 such as Fig. 4 c, the peripheral hardware timing element of voltage controlled oscillator 42 returns zero, exports the control command of next half cycle, finishes the transient state Synchronization Control of resonance type power converting means 1; According to the size of resonance type power converting means transient energy conversion, signal processor 32 outputs are finished replenishing of resonant energy by regulation and control electronic switch K3 pulse duration, guarantee that resonance type power converting means 1 is in resonance condition all the time; And the output of voltage controlled oscillator 42 input control termination error amplifiers 41, an input termination reference voltage V f of error amplifier 41, another termination output voltage V ₀The input of the output termination phase splitter 43 of voltage controlled oscillator 42, two main switch K1, the K2 control end of phase splitter 43 output termination resonance type power converting means 1, when the plus or minus deviation appears in output voltage, finish the soft readjustment of output voltage by the output frequency of regulation and control voltage controlled oscillator 42.

The technical solution of the utility model is on the basis of traditional univoltage ring control technology, be key, be auxiliary means with lock-out pulse testing circuit 2 with resonant energy supplementary circuitry 3, efficiently solve existing mode of resonance power inverter by zero load at full capacity, in the transient state transfer process that changes to zero load and busbar voltage at full capacity, power conversion unit 1 ' very easily enters a series of problems of runaway condition, is the Synchronization Control mode of resonance power inverter technical scheme that a kind of existing theory significance has actual application value again; Synchronization Control mode of resonance power inverter of the present utility model has originality and obvious improvement in reliability, aspect stable when possessing existing resonance type power converter advantage.

Description of drawings

Fig. 1 is the electrical schematic diagram of existing mode of resonance power inverter

The Synchronization Control mode of resonance power inverter theory diagram that Fig. 2 is provided for the utility model embodiment

The Synchronization Control mode of resonance power inverter electrical schematic diagram that Fig. 3 is provided for the utility model embodiment

The resonance type power converting means resonant inductance Lr of the Synchronization Control mode of resonance power inverter that Fig. 4 is provided for the utility model embodiment goes up the resonance potential signal waveforms of the voltage coupling winding 23 that increases, and (Fig. 4 a) and return zero pulse testing circuit 2 signal output waveform figure (Fig. 4 c), the output waveform of voltage controlled oscillator 42 is as figure (4b)

Embodiment

With reference to accompanying drawing 3, this Synchronization Control mode of resonance power inverter that the utility model embodiment is provided, it is by the resonance type power converting means 1 of double-ended control type structure, lock-out pulse testing circuit 2, resonant energy supplementary circuitry 3, the voltage-controlled translation circuit 4 of V/F, opening pulse-detecting circuit 5 constitutes, take out voltage coupled signal ULr from voltage coupling winding 23, connect an input of OR circuit 22 through rectifier 21 rectifications, another input of the output termination OR circuit 22 of voltage controlled oscillator 42, the peripheral hardware timing element of the output termination voltage controlled oscillator 42 of OR circuit 22, phase splitter 43 outputs meet two main switch K1 of resonance type power converting means respectively, K2 control end and two inputs of opening pulse-detecting circuit 5 are opened the reset terminal that pulse-detecting circuit 5 is exported termination signal processors 32; Current transducer 31 tape splicings have the input of the signal processor 32 of rectifier, the control end of signal processor 32 output termination electronic switch K3, resonant energy replenishes winding 33 through rectifier 34 rectifications, its output connects the busbar voltage two ends by electronic switch K3, constitutes the transient state Synchronization Control ring of mode of resonance power conversion unit; And the output of voltage controlled oscillator 42 input control termination error amplifiers 41, the input of the output termination phase splitter 43 of voltage controlled oscillator 42, the default reference voltage V f of one input termination of error amplifier 41, another input termination output voltage constitutes traditional output voltage control ring.

Claims

1, a kind of Synchronization Control mode of resonance power inverter has resonance type power converting means (1), lock-out pulse testing circuit (2); It is characterized in that: it by resonance type power converting means (1), lock-out pulse testing circuit (2), resonant energy supplementary circuitry (3), the voltage-controlled translation circuit of V/F (4), open pulse-detecting circuit (5) and constitute; The resonance potential (ULr) that lock-out pulse testing circuit (2) is searched and will be searched on the reflection resonance type power converting means resonant inductance Lr extracts formation Synchronization Control pulse (Uk), the peripheral hardware timing element of the voltage-controlled translation circuit of output termination V/F (4) of lock-out pulse testing circuit (2); Two inputs of lock-out pulse testing circuit (2) connect the output of voltage controlled oscillator (42) and the output of rectifier (21) respectively, and voltage coupling winding (23) connects the input of rectifier (21); Its output termination busbar voltage of resonant energy supplementary circuitry, open the voltage-controlled translation circuit of input termination V/F (4) of pulse-detecting circuit (5) two outputs, open the reset terminal of the output termination resonant energy supplementary circuitry (3) of pulse-detecting circuit (5), the output of secondary current coupler connects the input of resonant energy supplementary circuitry (3), constitutes the transient state Synchronization Control ring of mode of resonance power conversion unit; The output that the control end of two groups of main switches of the output termination resonance type power converting means (1) of the voltage-controlled translation circuit of V/F (4), two inputs of the voltage-controlled translation circuit of V/F (4) connect default reference voltage (Vf) and resonant mode power conversion unit (1) respectively constitutes traditional output voltage control ring.

2, Synchronization Control mode of resonance power inverter according to claim 1 is characterized in that: its lock-out pulse testing circuit (2) is made of voltage coupling winding (23) and rectifier (21), OR circuit (22); Voltage coupling winding (23) connects the input of rectifier (21), an input of the output termination OR circuit (22) of rectifier (21), and another input of OR circuit (22) links to each other with the output of voltage controlled oscillator (42).

3, Synchronization Control mode of resonance power inverter according to claim 1 and 2 is characterized in that: voltage coupling winding (23) is to go up the auxiliary winding that increases by resonant inductance Lr to constitute.

4, Synchronization Control mode of resonance power inverter according to claim 1 is characterized in that: its resonant energy supplementary circuitry (3) is to increase resonant energy to replenish winding (33) and its latter linked rectifier (34), electronic switch (K3) and secondary current coupler, signal processor (32) formation on resonance type power converting means resonant tank main transformer.

5, Synchronization Control mode of resonance power inverter according to claim 1 is characterized in that: its signal processor (32) is to be made of rectifier, the integral transformation device that has electronic switch and its latter linked comparator; Electronic switch controling end in its integral transformation device promptly constitutes the reset terminal of signal processor (32).

6, Synchronization Control mode of resonance power inverter according to claim 1 is characterized in that: opening pulse-detecting circuit (5) is an OR circuit.

7, Synchronization Control mode of resonance power inverter according to claim 1, it is characterized in that: the voltage-controlled translation circuit of its V/F (4) is made of voltage controlled oscillator (42), phase splitter (43), error amplifier (41), voltage controlled oscillator (42) is made pulse signal source, and the peripheral hardware timing element of voltage controlled oscillator (42) promptly constitutes the peripheral hardware timing element of the voltage-controlled translation circuit of V/F (4).