WO2008022513A1

WO2008022513A1 - A voltage adjustable driver for a sine wave ac power supply

Info

Publication number: WO2008022513A1
Application number: PCT/CN2007/001213
Authority: WO
Inventors: Lasheng Han
Original assignee: Lasheng Han
Priority date: 2006-08-14
Filing date: 2007-06-13
Publication date: 2008-02-28
Also published as: CN1917345A; CN100499341C

Abstract

A voltage adjustable driver for a sine wave AC power supply includes a regulating-voltage/switching circuit (1), a filtering/ voltage-regulated output circuit (2), an afterflow/reverse-prevented circuit (3), a photoelectrically coupling circuit (4), and a regulating-voltage control chip (5). The regulating-voltage control chip (5) is connected to the control terminal of the regulating-voltage/switching circuit (1) through the photoelectrically coupling circuit (4), the output of the regulating-voltage/switching circuit (1) is connected to the input of the filtering/voltage-regulated output circuit (2), one output branch of the filtering/voltage-regulated output circuit (2) is connected to the power input of the regulating-voltage/switching circuit (1), the other is connected to the input of afterflow/reverse-prevented circuit (3), and the output of the afterflow/reverse-prevented circuit (3) is connected to the afterflow input of the regulating-voltage/switching circuit (1).

Description

Sine wave AC power supply voltage regulator

The invention relates to an AC power supply voltage regulating driver, in particular to an energy-saving AC voltage regulating driver without output waveform distortion, in particular to a sine wave AC power voltage regulating driver. Background technique

The current sinusoidal AC power supply voltage regulator is mainly composed of thyristor, and the thyristor generally has the problem of distortion of the output voltage waveform and serious harmonic interference in the process of AC voltage regulation. The reason is: thyristor The control pole can only trigger the conduction, and can not trigger the shutdown. After the thyristor is turned on, it can be turned off only when the current of the thyristor is less than the minimum value of maintaining the conduction (automatically turn off the zero crossing in the AC power supply). Due to this working characteristic of the thyristor, it is difficult to technically process the sinusoidal AC power waveform. Therefore, the thyristor regulates the sinusoidal AC power supply, and can only adopt the method of triggering the conduction in the corresponding phase angle. Voltage regulation, although this achieves the purpose of voltage regulation, the output waveform is no longer a complete sine wave AC power supply, that is, the power supply voltage waveform before the current phase angle (conduction angle) has been lost, causing the power waveform to be severely distorted. What is more serious is that the moment when the thyristor is turned on, a large amount of harmonic current and voltage are injected into the grid to interfere with the electrical equipment, and the harmonic consumes a lot of energy.

At present, semiconductor power switching device, especially M0SFET, IGBT and other types of power switching tubes have made great progress. The existing power switching tube itself is applied in the sine wave AC power regulating device, as long as the design is reasonable, it is fully capable and competent. It can operate reliably, but such power switch tubes are technically demanding, especially for high frequency applications. If the design is not mature enough, although the voltage-regulated output waveform can be improved, it will also bring new problems: Switching tube power consumption (temperature rise) is high (often to eliminate interference), which directly leads to increased power consumption. The efficiency is low, the reliability of the operation is worse, the harmonics are still serious, the circuit is complicated, the cost is high, and the output voltage response is slow during the voltage regulation process, especially the step-down operation process and the output waveform are poorly symmetric, which may result in Non-resistive load devices are hot, unstable, and so on. Summary of the invention

The object of the present invention is to design a sinusoidal wave communication based on integrated circuit chip control technology for the waveform distortion existing in the existing thyristor voltage regulating circuit and the power consumption and circuit complexity of the power switch tube voltage regulating circuit. Power regulator driver.

The technical solution of the present invention is: A sinusoidal AC power supply voltage regulating driver comprises a voltage regulating/commutating circuit 1, a filtering/regulating output circuit 2, a freewheeling/reverse suppression circuit 3, a voltage regulating control chip 5, and is characterized by a voltage regulating control chip 5 is connected to each corresponding control end of the voltage regulating/commutating circuit 1 through the photoelectric coupling circuit 4, and the power input terminal of the voltage regulating/commutating circuit 1 is connected to the commercial power supply, and the output of the voltage regulating/commutating circuit 1 is filtered/regulated. The input end of the output circuit 2, the output of the filter/regulation output circuit 2 is connected to the mains input terminal of the voltage regulating/commutation circuit 1, and the input end of the other continuous/reverse suppression circuit 3, freewheeling/reverse The output of the suppression circuit 3 is connected to the freewheeling input of the voltage regulating/commutation circuit 1.

among them:

The voltage regulating/commutating circuit 1 can be composed of switching tubes Q1, Q2, Q3, Q4, inductors L1, L4, and its freewheeling input terminal is connected to the drain/reverse suppression circuit from the drains of the switching tubes Q2 and Q3. 3. Its power input terminal is taken out from the drains of the switch tubes Q1 and Q4, and is respectively connected to L-IN and N-IN at both ends of the mains power supply, and its control terminals are respectively connected from the gates of the switch tubes Q1, Q2, Q3 and Q4. Leading out, and connecting corresponding output ends of the voltage regulating control chip 5 through respective resistor networks and photoelectric coupling circuits 4, the output of the voltage regulating/commutating circuit 1 is respectively from the common source terminal of the switching tubes Q1, Q2 and the switching tubes Q3, Q4 The common source is taken out, and the two output terminals L_OUT, N-0UT are obtained through the inductors L1 and L4, respectively, which are connected to the filter/regulation output circuit 2.

The voltage regulating/commutating circuit 1 can also be composed of a switch tube W-Q5' and an inductor L1', and its freewheeling input terminal is taken from the source of the switch tube Q1' to the output end of the continuous flow/reverse suppression circuit 3. Its power input terminal is taken from the Q1 'drain through the bridge rectifier block Dl ' - D4' to the two ends of the mains power supply L-IN and N-IN, the control terminals are respectively from the switch tube Ql '-Q5 ' The gates are taken out, and respectively connected to the corresponding output ends of the voltage regulating control chip 5 through respective resistor networks and photoelectric coupling circuits 4, and the outputs of the voltage regulating/commutating circuit 1 are respectively taken out from the sources of the switching tubes Q2' and Q3' to obtain Two voltage regulating outputs L)UT, N-0UT, which are connected to the filter/regulation output circuit 2.

The filter/regulation output circuit 2 can be composed of a diode D1, D4 and a capacitor C3 connected in series, and its input is taken from the two ends of the capacitor C3 to the output of the voltage regulating/commutating circuit 1, that is, L-0UT, N-0UT, The output is taken from the positive and negative poles of diodes D1 and D4 respectively. The two negative output terminals of diodes D1 and D4 are connected to L-IN and N-IN at both ends of the mains power supply to form an AC circuit, and the two positive electrodes of diodes D1 and D4. The output terminal is connected to the stream/reverse suppression circuit 3.

The filtering/regulating output circuit 2 can also be composed of a capacitor C3', and its input and output terminals are L_0UT, N-0UT, and the input terminals L-0UT and M0UT respectively pass the voltage regulating/commutating circuit 1 The drain and source of the middle switch tubes Q4' and Q5' are directly connected to the flow/reverse suppression circuit 3, and at the same time, the bridge rectifiers D1 '-D4' are connected to the LJN and N-IN of the mains power supply to form an AC circuit. .

The freewheeling/reverse suppression circuit 3 can be composed of inductors L2, L3 and diodes D2 and D3 connected in series with each other, and the inputs are respectively taken from one ends of the inductors L2 and L3, and respectively connected to the filter/regulation output. The two output terminals of the circuit 2, that is, the positive poles of the diodes D4 and D1, are respectively taken out from the negative poles of the diodes D2 and D3, and are connected to the corresponding freewheeling input terminals of the voltage regulating/commutating circuit 1, that is, the switching tubes Q2 and Q3. Drain. The freewheeling/reverse suppression circuit 3 can also be composed of a diode D5' and an inductor L2' connected in series, and the input is taken from one end of the inductor L2' and filtered and regulated by the source and the drain of the switching transistors Q4' and Q5'. The output of the output circuit 2 is LOUT, N-0UT, and its output is connected from the negative terminal of the diode D5' to the freewheeling input terminal of the voltage regulating/commutating circuit 1, that is, the source of the switching transistor Q1'.

The voltage regulating control chip 5 is an integrated circuit control chip, which comprises a power supply unit, a clock source unit, a reset signal unit, a status display unit, a working mode selection unit, a voltage regulation data, and a (serial) line input interface unit, and an over temperature. Protection unit, overload short circuit protection unit, phase signal detection unit, voltage regulation control output unit, freewheeling control output unit, and commutation control output unit, a total of 12 working units.

The working mode of the voltage regulating control chip 5 is selected, and there are four coded input ports A0, Al, A2, and A3, and the coded values respectively correspond to: stop working, non-commutated AC single-phase working mode, non-commutated communication Two-phase synchronous working mode, non-commutated alternating current two-phase asynchronous working mode, non-commutated alternating current three-phase synchronous working mode, non-commutated alternating current three-phase asynchronous working mode, commutating alternating current single-phase working mode, and commutating alternating current Phase synchronous working mode, commutating AC two-phase asynchronous working mode, commutating AC three-phase synchronous working mode, commutating AC three-phase asynchronous working mode, DC single-group working mode, DC synchronous dual-group working mode, DC synchronous three Group working mode, DC non-synchronous dual-group working mode, DC non-synchronizing three working modes, a total of 16 working modes.

The phase signal detecting unit of the voltage regulating control chip 5 is a three-way AC voltage phase detecting port, detecting the phase of the sine wave AC power voltage waveform, controlling the output state of each output port, thereby controlling the corresponding voltage regulating/commutating circuit 1 The switch tube works or is turned off; the voltage regulation data and (serial) line input interface, control the output voltage level or the specific data of the alarm content by inputting the corresponding control value; the voltage regulation control output unit is three-way output, which can be output The pulse (P) control signal voltage is widened, and the switching tube in the voltage regulating/commutating circuit 1 is controlled to obtain a synchronous or asynchronous voltage regulating voltage output, and the output mode is controlled by the working mode selecting unit; the freewheeling control output unit is three The output of the circuit controls the switch tube in the freewheeling circuit and is controlled by the signal of the phase signal detection end to synchronize with the positive and negative half cycles of the voltage regulating main circuit; the commutation control output unit is three outputs, and the commutating switch tube is controlled Working status.

The invention has the following advantages:

(1) The positive and negative half cycle voltage regulation circuits of the sine wave AC power supply are strictly symmetrical, thus ensuring that the output waveform of the voltage regulating power supply is not distorted;

(2) Since the positive and negative half cycle voltage regulation circuits are symmetrical, it can ensure that the positive and negative half cycles are filtered by the same low-pass filter, and the current voltage added to the load is a pure sine wave without a frequency component;

(3) The distributed inductance of the input side of the invention is small, and the device under high-frequency operation strictly limits its inrush current, and the charging of the parallel capacitor buffer circuit on the switching tube under the rated load working state is cancelled. The discharge makes the loss of the switch tube extremely small, and requires only a small heat sink, which not only saves the heat dissipation material, reduces the volume of the invention, but also further saves electric energy and improves efficiency. At the same time, the switch tube works at low power consumption, making it work. The security has been further improved;

(4) The invention adopts an integrated circuit control chip to implement voltage regulation control, so that the circuit structure is simple and the dynamic stability is good;

(5) Solving the distortion of the sine wave AC power supply voltage regulation output waveform, harmonic interference and power loss caused by harmonics, greatly reducing the temperature of the switching tube during operation, thus improving the application efficiency of the switching tube, At the same time, the volume is reduced, which reduces the cost.

(6) The present invention is applicable to various types of voltage regulating devices of various sizes and powers, and thus has a wide application range. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing the electrical structure of the present invention.

Figure 2 is one of the electrical schematics of the present invention.

Figure 3 is a second schematic diagram of the electrical schematic of the present invention.

4 is a schematic block diagram of an integrated circuit type voltage regulating control chip of the present invention. detailed description

The invention will be further illustrated by the following structural drawings and examples.

Embodiment 1.

As shown in FIG. 1, the sine wave AC power supply voltage regulating driver of the present invention comprises a voltage regulating/commutating circuit 1, a filter/regulation output circuit 2, a freewheeling/reverse suppression circuit 3, a photoelectric coupling circuit 4, and a modulation. The voltage control chip 5, the voltage regulating control chip 5 is connected to the control end of the voltage regulating/commutating circuit 1 through the photoelectric coupling circuit 4, and the output of the voltage regulating/commutating circuit 1 is connected to the input end of the filtering/regulating output circuit 2, filtering/tuning The output of the voltage output circuit 2 is connected to the power input terminal of the voltage regulating/commutating circuit 1, the other is connected to the input end of the current/reverse suppression circuit 3, and the output of the freewheeling/reverse suppression circuit 3 is connected to the voltage regulating/reversing direction. The freewheeling input of circuit 1.

Figure 2 shows an electrical schematic of the invention. Wherein: The voltage regulating/commutating circuit 1 is composed of a switching tube Ql, Q2, Q3, Q4, an inductor Ll, L4, a capacitor Cl, a Zener diode Zl, Z2 and a capacitor C2, and a Zener diode Z3, Z4 respectively constitute a switching tube Ql , Q4 overload or short circuit protection circuit. Its freewheeling input terminal is taken out from the drains of the switching transistors Q2 and Q3, and the current/reverse suppression circuit 3 is connected. The power input terminal is taken out from the drains of the switching transistors Q1 and Q4, and respectively connected to the two ends of the commercial power supply. L-IN and N-IN, the control terminals are taken out from the gates of the switching transistors Ql, Q2, Q3, Q4, respectively, and connected to the voltage regulating control chip 5 through respective resistor networks and optocoupler circuits 4 (the chip can be used with existing integrated circuits) Write specific software, see the following instructions, the implementation of the chip function can be implemented by the FPGA device, that is, the field programmable gate array, programmed by the hardware description language to the corresponding output of the FPGA device, voltage regulation / commutation The output of the circuit 1 is taken from the common source terminal of the switching transistors Q1, Q2 and the common source terminal of the switching transistors Q3, Q4, respectively, and is respectively powered. The sense L1, L4 obtains two output terminals Li) UT, N-0UT, which are connected to the filter/regulation output circuit 2.

The filter/regulation output circuit 2 is mainly composed of a diode D1, D4 and a capacitor C3 series branch, and its input is taken out from both ends of the capacitor C3, and the output of the voltage regulating/commutating circuit 1 is L- 0UT, N-0UT, Its output is taken from the positive and negative poles of diodes D1 and D4 respectively. The two negative output terminals of diodes 1)1 and D4 are connected to L-IN and N-IN at both ends of the mains power supply to form an AC loop, diodes D1 and D4. The two positive output terminals are connected to the flow/reverse suppression circuit 3.

The freewheeling/reverse suppression circuit 3 is composed of inductors L2, L3 and diodes D2 and D3 connected in series, and the inputs are respectively taken from one ends of the inductors L2 and L3, and respectively connected to the two outputs of the filter/regulation output circuit 2. The terminals are the positive poles of D4 and D1, and the outputs are respectively taken out from the negative poles of the diodes D2 and D3, and connected to the freewheeling input terminals of the voltage regulating/commutating circuit 1 as the drains of the switching transistors Q2 and Q3.

Its working principle is as follows:

The two symmetric working units in Figure 2 respectively control the positive and negative half-cycle voltage regulation of the sine wave AC power supply. The contacts LJN and N-IN in the figure are the sine wave AC power input connection points, L_OUT and N-OUT are Sine wave AC power regulator output, connected to the load. When the current flows from L-IN to ί ΙΝ half cycle, the switch tubes Ql, Q2 work, Q3, Q4 close, when the current flows from N-IN to L-IN half cycle, the switch tubes Q3, Q4 work, Ql, Q2 close. Their operating states are controlled by the photoelectric coupling circuit 4 after the voltage regulating control signal output from the voltage regulating control chip 5 is coupled.

When the current flows from L_IN to N_IN for half a week, the composition of its working unit is (hereinafter referred to as: positive half cycle): L—IN (input), switching transistor Q1 (regulation control), inductance L1, load (L-OUT to N_0UT) ), diode D4, N—IN (output), which constitute the main circuit of voltage regulation; induced current of inductor L1 through load (LJ) UT to N—OUT), inductor L2, diode D2, switching tube Q2 freewheeling (inductance) The discharge process of the induced current, referred to as: freewheeling); the inductor Ll, the capacitor C3, the load, and the diode D4 form a positive half-cycle low-pass filter.

When the current flows from N_I^ί to the half cycle of L_IN, the composition of its working unit is (hereinafter referred to as: negative half cycle): N_IN (input), switching transistor Q4 (regulation control), inductance L4, load (N-OUT) To L-OUT), diode Dl, L-IN (output), they form the main circuit of voltage regulation; the induced current of inductor L4 flows through the load (N-0UT to L_0UT), inductor L3, diode D3, and switch tube Q3 Inductor L4, capacitor C3, load, diode D1 form a negative half-cycle low-pass filter.

The positive and negative half-cycle working units operate alternately with positive and negative half cycles with the control of the power supply voltage. During the positive half cycle, Q1 and Q2 work, Q3 and Q4 turn off; in the negative half cycle, Q1 and Q2 are closed, Q3 and Q4 works.

The waveform diagram (input power supply waveform, voltage regulation waveform, and voltage regulation output waveform) inserted in Fig. 2 is the basic process of waveform transformation when the circuit of the present invention operates. The switching transistors Q1 and Q4 output high-frequency pulse current under the control of the high-frequency widening pulse control voltage outputted by the voltage regulating control chip 5, respectively, through the inductor L1, the capacitor C3, the load, the diode D4 and the inductor L4, the capacitor C3, and the load. , diode D1 implements positive and negative half-cycle low-pass filtering, plus inductor Ll, L4 induces electricity The freewheeling action of the current and the blocking of the reverse recovery surge current of the diodes D2 and D3 by the inductors L2 and L3 effectively eliminate the harmonic interference and the power loss caused by the harmonics, so that the electric energy is fully absorbed by the load. To improve efficiency, the voltage-regulated output waveform follows the power input waveform without distortion.

In Fig. 2, Gl and SI are the control pole circuits of the switch tube Q1, and are connected to the voltage regulating control output interface of the control chip via the photoelectric isolation driver; G2, SI is the circuit of the control pole of the switch tube Q2, and is connected to the control chip via photoelectric isolation. The freewheeling control output interface; G4, S2 is the control pole circuit of the switch tube Q4, and is connected to the voltage regulating control output interface of the control chip via the photoelectric isolation driver; G3, S2 are the loops of the control pole of the switch tube Q3, and are connected by photoelectric isolation To the freewheeling control output interface of the control chip.

Example 2.

As shown in Fig. 3, it shows another specific embodiment of the electrical block diagram shown in Fig. 1.

Wherein: The voltage regulation/commutation circuit 1 in the electrical principle block diagram is composed of a switch tube Ql '-Q5 ' and an inductor L1', and its freewheeling input terminal is connected from the source of the switch tube Q1' to the continuous flow/reverse suppression circuit. The output terminal of 3, its power input terminal is taken out from the drain of Q1 ', and the L- IN and N- IN of the mains power supply are connected through the bridge rectifier block Dl '-D4', and the control terminals thereof are respectively taken from the switch tube Ql The gate of '-Q5' is taken out, and the voltage regulating control chip 5 is connected through the respective resistor network and the photoelectric coupling circuit 4. The chip can be made by writing an existing integrated circuit into a specific software, and the implementation of the chip function can be performed by the FPGA device. The programmable gate array is programmed by the hardware description language to be output to the corresponding output end of the FPGA device, and the output of the voltage regulating/commutating circuit 1 is taken out from the sources of the switching transistors Q2' and Q3' respectively to obtain two voltage regulating outputs. Terminals L- 0UT, N-0UT, which are connected to the filter/regulation output circuit 2.

The filter/regulation output circuit 2 in the electrical block diagram is composed of a capacitor C3', its input and output terminals are L-0UT, N-OUT, and the input terminals L-0UT and N-0UT are respectively regulated/changed. The drain and source of the switching transistors Q4' and Q5' in the circuit 1 are directly connected to the flow/reverse suppression circuit 3, and at the same time, the bridge rectifiers D1'-D4' are connected to both ends of the commercial power supply L-IN, N- IN, forming an AC loop.

The freewheeling/reverse suppression circuit 3 in the electrical block diagram is composed of a diode D5' and an inductor L2' connected in series, the input of which is drawn from one end of the inductor L2', and is filtered by the source and the drain of the switching transistors Q4' and Q5'. The output of the voltage regulating output circuit 2 is L-0UT, N-0UT, and its output is connected from the negative terminal of the diode D5' to the source of the freewheeling input terminal of the voltage regulating/commutating circuit 1, that is, Q1'.

Its working principle is as follows:

The positive-negative half-cycle voltage regulation of the sine wave AC power supply is completed by a single switch tube Q1 ', and the positive and negative half cycles are respectively output through two symmetrical output loops. The contact L_II^P N_IN in the figure is sinusoidal. Wave AC power input connection point, L-OUT and NJ3UT are voltage-regulated sine wave AC power output, connected to the load. When the current flows from L_IN to N_IN half cycle (positive half cycle), Q2', Q5' work, Q3', Q4' close, when current flows from N-IN to LJN half cycle (negative half cycle), Q3 ', Q4' work , Q2 ', Q5 ' is off. Their working status is also adjusted Control of the voltage control chip 5.

In the figure, the power input of the circuit is a rectifier bridge composed of Dl', D2', D3', D4', so that the positive and negative half-cycle current is directed into the switching tube Q1' to regulate the voltage, and then through the switching tubes Q2', Q3', Q4', Q5' Four switching tubes follow the control signal of the voltage regulating control chip 5 to follow the phase of the input sine wave AC power supply voltage waveform, control on or off, and commutate to a complete sine wave AC power supply voltage regulation output.

When the current flows from the half cycle to N-IN, its working path is (abbreviation: positive half cycle): L—IN (input), diode D2', switching transistor Q1', inductor L1', switching transistor Q2', load (L) — OUT to N—OUT), switching transistor Q5′, diode D3′, N_IN (output), which form the positive half-cycle voltage regulation main circuit (switching tubes Q3' and Q4' are in the closed state during positive half-cycle operation); inductor L1' The induced current flows through the switch Q2', the load (from L_OUT to N-0UT), the switch Q5', the inductor L2', and the diode D5' constitute a freewheeling circuit; the inductor L1', the capacitor C2', the switch Q2 ', capacitor C3', load (from L-OUT to !0UT), switch Q5' and diode D3' form a positive half-cycle low-pass filter loop.

When the current flows from 1 to L_IN for half a cycle, its working path is (abbreviation: negative half cycle): _IN (input), diode D1', switching transistor Q1', inductor L1', switching transistor Q3', load (NJXJT to L_0UT), switch Q4', diode D4', L_IN (output), they form the negative half cycle voltage regulation main circuit (Q2' and Q5' are closed during negative half cycle operation); the induced current of inductor L1' is passed through the switch Q3', load, switch Q4', inductor L2', diode D5' form a freewheeling circuit; inductor L1', capacitor C2', switch Q3', capacitor C3', load, switch Q4', diode D4' Negative half cycle low pass filter loop.

The waveform diagram inserted in the figure (input power waveform, directional pulsation waveform, voltage-regulated output waveform) is the basic process of waveform transformation during the operation of the circuit of the present invention, and the high-frequency widening pulse outputted by the switching transistor Q1' at the voltage regulating control chip 5 Under the control of the control voltage, the high-frequency pulse current is output through the inductor L1', the capacitor C2', the switch Q2', the capacitor C3', the load, the diode D3', the switch Q5', and the inductor L1' and the capacitor C2'. The low-pass filter consisting of the switch Q3', the capacitor C3', the load, the switch Q4', and the diode D4' performs positive and negative half-cycle low-pass filtering, plus the freewheeling effect of the induced current of the inductor L1' and the inductance L2' reverses the surge current recovery of diode D5', eliminates harmonic interference and power loss caused by harmonics, so that the electric energy is fully absorbed by the load, and the efficiency is improved, and the regulated output waveform follows the power supply. The input waveform is not distorted.

In the circuit, Gl ⁷ and S1' are the control pole circuits of the switching transistor Q1', and are connected to the voltage regulating control corresponding output interface of the voltage regulating control chip 5 via the photoelectric coupling circuit; G2', S2', G3', S3', G4' , S4' and G5', S4' are the control pole circuits of the switching tubes Q2', Q3', Q4' and Q5', respectively, respectively connected to the corresponding commutation control of the voltage regulating control chip 5 via the respective photoelectric coupling circuits 4. Output interface; Capacitor C1', Zener diode Z1', 11, protect circuit when output overload or output short circuit, protect switch Q1'.

The voltage regulating control chip 5 involved in the first embodiment and the second embodiment is an integrated circuit control chip, which can be used. Xilinx's XC4000 series FPGA devices or other companies' FPGA devices are implemented by auxiliary circuit programming. They can also be implemented as ASICs for non-FPGA devices by referring to Figure 4. The control chip shown in Figure 4 is designed to control the voltage-regulating and commutating circuit in Figure 2 and Figure 3. The chip can be applied to AC or DC power supply through the setting of [Working Mode Selection]. Multi-channel synchronous or non-synchronous voltage control output. The control chip is internally composed of a power supply unit, a clock source unit, a reset signal unit, a status display unit, a working mode selection unit, a voltage regulation data and a (serial) line input interface unit, an over temperature protection unit, an overload (short circuit) protection unit, and a phase signal. The detection unit, the voltage regulation control output unit, the freewheeling control output unit, and the commutation control output unit are composed of 12 working units. The functions of each main unit are as follows:

Work mode selection:

Pin names: A0, Al, A2, A3, CE2.

Function: It is combined by A0, Al, A3 and A3 to realize the control of different working modes.

CE2 is the enable setting of the working mode. When a leading edge trigger signal is given, the current combined encoded data is written internally.

The encoding function is as follows:

A3, A2, Al, A0=0000 stop working. In this state, the phase angle compensation value is input through the voltage regulation data and (string) input interface;

A3, A2, Al, A0= :0001 Non-commutated AC single-phase operation mode;

A3, A2, Al, AO: =0010 Non-commutated AC two-phase synchronous working mode;

A3, A2, Al, A0= =0011 Non-commutated AC two-phase asynchronous operation

A3, A2, Al, A0= :0100 non-commutated AC three-phase synchronous working mode;

A3, A2, Al, A0= =0101 non-commutated AC three-phase asynchronous operation mode;

A3, A2, Al, AO: =0110 commutation AC single-phase operation mode;

A3, A2, Al, A0-- =0111 commutation AC two-phase synchronous working mode;

A3, A2, Al, A0==1000 commutation AC two-phase asynchronous operation mode;

A3, A2, Al, AO: 4001 commutating AC three-phase synchronous working mode;

A3, A2, Al, A0==1010 commutation AC three-phase asynchronous operation mode;

A3, A2, Al, A0= 4011 DC single group working mode;

A3, A2, Al, AO: =1100 DC synchronous dual-group working mode;

A3, A2, Al, A0==1101 DC synchronous three-group working mode;

A3, A2, Al, A0= =1110 straight it non-synchronous two-group working mode;

A3, A2, Al, AO: =1111 DC non-synchronous three groups of working methods.

Phase signal detection: Pin name: LA, NA; LB, NB; LC, NC three groups (Group A, Group B, Group C) are connected to the phase detection sensor; Function: Detect the phase of the current sine wave AC power supply voltage waveform under AC operation , controlling the output state of each output port, thereby controlling the switching tube of the corresponding circuit in the voltage regulating/commutating circuit to work or be turned off;

The internal phase has positive and negative phase angle compensation of 1-12 degrees. The compensation data is input to the phase angle compensation value through the voltage regulation data and the (serial) line input interface, which serves the purpose of regulating the positive and negative half-cycle of the output without distortion.

Voltage-regulated data and (serial) line input interface - Pin name: (DO-D7) 8-bit data bidirectional parallel port; TDI (bidirectional serial data line); TCK (bidirectional serial clock line); WE (write data enable Can, parallel string is valid); RD (when INT is valid, read data is enabled, and the string is valid); CE1 (write data is allowed, and the string is valid); P\S (parallel or serial port selection); G\R (after reset When the power level is low, the power supply voltage is output soft start, and when the power level is high, the power supply voltage output value directly follows the voltage regulation data);

Function: The function of this interface is to input the data value of the current power supply voltage output from 0 to 255 through the parallel port or serial port. The size of the input data directly controls the level of the output voltage; when there is a fault alarm signal (INT low level) Read the specific data of the alarm content from the parallel port or serial port; When the code selected for the working mode is set to "0000", (in the INT high state) input positive and negative phase from the parallel port or serial port Angle compensation value.

Clock source:

Pin name: CLK, connected to external crystal oscillator;

Function: It is the internal clock source of the chip.

Reset signal: Pin name: RESET;

Function: When resetting at low level, internal initialization, while stopping all output ports.

Overload (short circuit) protection:

Pin name: AI, BI, CI, connected to an external independent three-way overload (short circuit) detection sensor; Function: Real-time detection of overload or short circuit for each working circuit, immediately turn off the corresponding output when overload or short circuit, internal There is (time delay automatic adjustment) current limit restart output function to ensure the safety of the switch tube.

Over temperature protection: Pin names: Π, Τ2, Τ3, connected to an external independent temperature detection sensor;

Function: For the circuit that is working in each, the over-temperature real-time detection, immediately close the corresponding voltage-regulated drive circuit when over-temperature, and delay (detect) restart.

Working status indication: Pin name: Xiamen, A-LED, B-LED, C-LED;

Function: When each detection port detects overload, short circuit or over temperature, the INT pin immediately outputs a low level (alarm signal). At this time, through the parallel port or serial port of [voltage regulation data and (serial) input interface], (Send RD read signal) can read the specific content of the current fault from the parallel port or serial port; A_LED, B-LED, C-LED external LED indicator, each independently indicate A, B, C three loops, work When the indicator of the corresponding circuit is normally on, the corresponding indicator of the corresponding circuit is strobed, the corresponding indicator light is off when the temperature is over temperature, and the output voltage is set to zero when the operation is normal. Voltage Control Output - Pin Name: L_A, N_A (Group A); L__B, N_B (Group B); L_(, N-C (Group C), three sets of synchronous or non-synchronous regulated voltage output;

Function: The control output port outputs the width adjustment pulse (P) control signal voltage, and controls the switching tube in the voltage regulation/commutation main circuit. The control output port is determined by [working mode selection], its output working mode, in sine Under the AC power supply mode, the L and N terminals of each group are controlled by the phase signal detection, and the positive and negative half cycles of the input power supply voltage are alternately operated. In the circuit of Figure 3 or during DC operation, the L terminals of each group are valid. Group N end high resistance.

Freewheeling control output:

Pin name: LA—I, NA_I (group A); LB_I, NB_I (group B); LC—I, NC_I (group C) three groups; function: The control output port is controlled to freewheel in the working mode of Figure 2. In the circuit, the L- and N-ends of each group are synchronized with the positive and negative half cycles of the corresponding voltage-regulating main circuit under the control of phase signal detection. In Figure 3 or DC mode, each group only uses L. End (or not), each group's N-terminal high-impedance state, the output mode of operation is determined by [working mode selection].

Commutation control output:

Pin name: LA—Kl, LA—Κ2, ΝΑ—Κ1, ΝΑ_Κ2 (Α group); LB—Kl, LB—Κ2, ΝΒ_Κ1, ΝΒ—Κ2 (Β group); LC—Kl, LC—Κ2, NCJQ, NC_K2 (Group C).

Function: The control output port is controlled by the commutating switch tube. In the sine wave AC power supply mode, the L and N terminals of each group are controlled by the phase signal detection, synchronized with the positive and negative half cycles of the input power supply voltage, and the switch tubes work alternately. In the DC mode, each group only selects the L terminal (or not), the N-terminal high-impedance state of each group, and the output working mode is determined by [Working mode selection].

power supply:

The lower pin name: VCC1, VCC2, GND (connect external power supply);

Function: The chip power input interface.

Claims

The present invention provides a sinusoidal AC power supply voltage regulating driver comprising a voltage regulating/commutating circuit (1), a filtering/regulating output circuit

(2), freewheeling/reverse suppression circuit (3), voltage regulation control chip (5), characterized in that the voltage regulation control chip (5) is connected to the voltage regulation/commutation circuit through the photoelectric coupling circuit (4) (1) Each corresponding control terminal, the power input terminal of the voltage regulating/commutating circuit (1) is connected to the mains power supply, and the output of the voltage regulating/commutating circuit (1) is connected to the filtering/regulating output circuit (2) input, filtering/ The output of the voltage regulating output circuit (2) is connected to the mains input terminal of the voltage regulating/commutating circuit (1), the input end of the other continuous current/reverse suppression circuit (3), and the freewheeling/reverse suppression circuit The output of (3) is connected to the freewheeling input of the regulator/commutation circuit (1).

The sine wave AC power supply voltage regulating drive according to claim 1, wherein said voltage regulating/commutating circuit is

(1) It consists of switching transistors Ql, Q2, Q3, Q4, inductors L1, L4, and its freewheeling input terminal leads from the drains of switching transistors Q2, Q3 to the connected current / reverse suppression circuit (3), its power supply The input end is taken out from the drains of the switch tubes Q1 and Q4, respectively connected to the two ends of the mains power supply L-IN and N-IN, and the control ends thereof are taken out from the gates of the switch tubes Q1, Q2, Q3, Q4, respectively, and The respective output terminals of the voltage regulating control chip (5) are connected through respective resistor networks and photoelectric coupling circuits (4), and the output of the voltage regulating/commutating circuit (1) is respectively from the common source terminal of the switching transistors Q1 and Q2 and the switching transistor Q3. The common source terminal of Q4 is taken out, and the two output terminals Li)UT and N-0UT are obtained through the inductors L1 and L4 respectively, and they are connected to the filter/regulation output circuit (2).

(1) It consists of a switch tube Ql '-Q5' and an inductor L1'. Its freewheeling input terminal leads from the source of the switch tube Q1' to the output of the connected/reverse suppression circuit (3), its power input. The terminal is taken from the drain of Q1 ' through the bridge rectifier block Dl ' - D4' to the two ends of the mains power supply L-IN and N-IN, and its control terminal is taken out from the gate of the switch tube Q1 ' - Q5 ', respectively, and The respective output terminals of the voltage regulating control chip (5) are respectively connected through respective resistor networks and photoelectric coupling circuits (4), and the outputs of the voltage regulating/commutating circuit (1) are respectively taken out from the sources of the switching tubes Q2' and Q3'. Two regulated output terminals UT, N-0UT are obtained, which are connected to the filter/regulation output circuit (2).

The sine wave AC power supply voltage regulating driver according to claim 1, wherein said filter/regulation output circuit (2) is formed by connecting diodes D1, D4 and capacitor C3 in series, and its input is from both ends of capacitor C3. The output of the voltage regulator/commutation circuit (1) is L_0UT, N-0UT, and its output is taken from the positive and negative terminals of the diodes D1 and D4, respectively. The two negative terminals of the diodes D1 and D4 are connected to the mains power supply. The two ends L-IN, N-IN form an AC loop, and the two positive outputs of the diodes D1 and D4 are connected to the flow/reverse suppression circuit (3).

The sine wave AC power supply voltage regulating driver according to claim 1, wherein said filter/regulation output circuit (2) is composed of a capacitor C3', and its input and output terminals are both L-0UT and N. -0UT, and the input terminal LOUT, N-OUT passes through the drain and source of the switching transistors Q4' and Q5' in the voltage regulating/commutating circuit (1), and directly connects to the current/reverse suppression circuit (3), and simultaneously passes through the bridge rectifier block Dl '-D4'. Connect the L-IN and MIN at both ends of the mains supply to form an AC circuit.

The sinusoidal AC power supply voltage regulating driver according to claim 1, wherein said freewheeling/reverse suppression circuit (3) is composed of inductors L2, L3 and diodes D2 and D3 connected in series, respectively. The input is respectively taken from one end of the inductors L2 and L3, and respectively connected to the positive ends of the diodes D4 and D1 of the two output terminals of the filter/regulation output circuit (2), and the outputs thereof are respectively taken out from the negative electrodes of the diodes D2 and D3, and are connected. The corresponding freewheeling input terminals in the voltage regulating/commutating circuit (1), that is, the drains of the switching transistors Q2, Q3.

A sinusoidal AC power supply voltage regulating driver according to claim 1, wherein said freewheeling/reverse suppression circuit (3) is formed by a series connection of a diode D5' and an inductor L2', the input of which is from the inductor L2' One end leads to the output of the source and drain connected filter/regulation output circuit (2) through the bypass transistors Q4' and Q5', that is, L_OUT and N-OUT, and the output is connected from the negative terminal of the diode D5'. The freewheeling input of the commutation circuit (1) is the source of the switching transistor Q1'.

The sine wave AC power supply voltage regulating driver according to claim 1, wherein said voltage regulating control chip

(5) is an integrated circuit control chip, which comprises a power supply unit, a clock source unit, a reset signal unit, a status display unit, a working mode selection unit, a voltage regulation data and a (serial) line input interface unit, an over temperature protection unit, and an overload ( Short circuit) protection unit, phase signal detection unit, voltage regulation control output unit, freewheeling control output unit, and commutation control output unit have 12 working units.

The sine wave AC power supply voltage regulating driver according to claim 8, wherein said voltage regulating control chip (5) operates in a mode, and has a four-way coded input port A0, Al, A2, A3, and an encoding thereof. The values correspond to: stop working, non-commutated AC single-phase working mode, non-commutated AC two-phase synchronous working mode, non-commutated alternating current two-phase asynchronous working mode, non-commutated alternating current three-phase synchronous working mode, non-commutated AC three-phase asynchronous working mode, commutating AC single-phase working mode, commutating AC two-phase synchronous working mode, commutating AC two-phase asynchronous working mode, commutating AC three-phase synchronous working mode, commutating alternating current three-phase non-synchronous working mode There are 16 working modes: synchronous working mode, DC single-group working mode, DC synchronous dual-group working mode, DC synchronous three-group working mode, DC non-synchronized dual-group working mode, and DC asynchronous three-group working mode.

The sine wave AC power supply voltage regulating driver according to claim 8 or 9, wherein the phase signal detecting unit of the voltage regulating control chip (5) is a three-way AC voltage phase detecting port for detecting a sine wave The phase of the AC power supply voltage waveform controls the output state of each output port to control the operation or shutdown of the switch tube in the corresponding voltage regulation/commutation circuit (1); the voltage regulation data and the (serial) line input interface are controlled by input. The value controls the level of the output voltage or reads the specific data of the alarm content; the voltage regulating output unit is three outputs, the output widening pulse (PWM) control signal voltage, and the switching tube in the voltage regulating/commutating circuit (1) is controlled. , get synchronized or different The step voltage voltage output, the output mode is controlled by the working mode selection unit; the freewheeling control output unit is a three-way output, controls the switch tube in the freewheeling circuit, and is controlled by the signal of the phase signal detection end, so that it is synchronized with the voltage regulation The main circuit alternates between positive and negative half cycles; the commutation control output unit is three-way output, which controls the working state of the commutating switch tube.