CN1797258A - A. c. electricity control device - Google Patents

Abstract

The present invention uses simple method to realize the controlling of the output electric tension in the control device of the alternating current voltage when the capacity of the equipment is not increased. Connect in parallel the single-phase two-wire system input terminals R1, S1 to one end and the other end of the autotransformer TR1 with center tapping, connect the input end S1 with output end S2 with pin cord c1, it includes a primary winding P whose one end is connected to one end of the autotransformer TR1, a transformer TR2 which do magnetic coupling to the primary winding P and is connected to the secondary winding S between the input end R1 and the output end R2; and a switch which switches the connecting objects of the other end of the primary winding P with any end in one end of the autotransformer, the tap, or the other end.

Description

Ac voltage control device

Technical field

The present invention relates to ac voltage control device, particularly for the AC power of single-phase-two-wire system, three-phase three-wire system or three-phase four-wire system, realize obtaining making the voltage of this AC power to be the ac voltage control device of the voltage transitions that AC power that classification descends or rise uses with easy structure.

Background technology

From the alternating voltage of source power supply to the load supply, its every kind power supply mode or all be miscellaneous in each country, for example, single-phase-two-wire system 100/200V, single-phase-two-wire system 220V, single-phase three wire system 100/200V, three-phase three-wire system 200V, three-phase four-wire system 100/200V, three-phase four-wire system 220/380V etc. are arranged.And, not to be constant, certain prerequisite that can be changed to supply with voltage always, this changes allowed band by relevant statutory regulations.Therefore,, require correspondingly, absorb such change in voltage, guarantee in these voltage ranges, to move with various power supply modes and voltage at the equipment side that is connected with load.Why service voltage has such amplitude, even be because in one day, in the morning, noon, also change in voltage can take place at dusk, and, variant because of its power condition of zones of different, and make that service voltage is difficult to keep.

In addition, the equipment that is connected load-side except special equipment, even all be the equipment that also can work fully in the low-voltage that departs from normal voltage about 5% to 10% basically, and, can expect to obtain energy-saving effect by reducing service voltage.Therefore, can reduce the service voltage of supply load and its stable technology is attracted people's attention very much.

Under these circumstances, proposed to pass through to use the formation example (reference example such as patent documentation 1, patent documentation 2) of the voltage amplitude regulator of transformer and semiconductor element intricately formation with the device of adjusting output voltage.

(patent documentation 1) spy opens the 2000-83378 communique

(patent documentation 2) spy opens the 2004-30089 communique

Summary of the invention

But; in above-mentioned patent documentation 1, patent documentation 2; must generate PWM control output by the control of on-off elements such as semiconductor switch; owing to added these PWM control function; therefore in the complicacy of the volume, scale or the device that have increased device, also there is the problem that equipment price is gone up.

The present invention puts forward in view of the above problems, and its 1st purpose is, complicated controls such as needn't carrying out PWM control is provided, and the increase of volume, scale and complicacy that can restraining device and the ac voltage control device with good ratio of performance to price.And, its the 2nd purpose is, provide effectively utilize various power supply modes existing electric supply installation particularly single-phase-two-wire system, three-phase three-wire system or three-phase four-wire system commercial power-supply unit, simultaneously with the ac voltage control device of the impaired easy method realization of the reliability that does not make device itself.Its 3rd purpose also is, provides the voltage that can make single-phase-two-wire system, three-phase three-wire system or three-phase four-wire system AC power to be the ac voltage control device of step control.

In order to address the above problem, ac voltage control device according to the present invention has following characteristics, be the above-mentioned ac voltage control device of pair of output (R2, S2) that comprises the single-phase-two-wire system AC power of a pair of input end (R1, S1) of input single-phase-two-wire system AC power and voltage decline that output makes this AC power or rising, comprise the lead-in wire (c1) that the end (S1) of above-mentioned input end links to each other with an end (S2) of above-mentioned output terminal; One end is connected the other end (R1) of above-mentioned input end and the other end is connected an above-mentioned end (S1) of above-mentioned input end, and the middle autotransformer (TR1) that has a tap at least; Have elementary winding (P) and and this elementary winding (P) carry out magnetic coupling and be connected the above-mentioned other end (R1) of above-mentioned input end and the other end (R2) of above-mentioned output terminal between the transformer (TR2) of secondary winding (S); And the interconnected relationship of an end of above-mentioned elementary winding (P) and the other end and an above-mentioned end of above-mentioned autotransformer (TR1), above-mentioned tap and the above-mentioned other end selected the switch (SW1, SW1 and SW2 or SW3) changed.

According to the present invention, the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, by the interconnected relationship of an end, tap and the other end of an end of elementary winding and the other end and these autotransformers is changed, can make single-phase-two-wire system AC power be two-stage at least and descend or rise.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be the above-mentioned ac voltage control device of pair of output (R2, S2) that comprises a pair of input end (R1, S1) of input single-phase-two-wire system AC power and export the single-phase-two-wire system AC power of the voltage decline that makes this AC power, comprise the lead-in wire (c1) that the end (S1) of above-mentioned input end links to each other with an end (S2) of above-mentioned output terminal; One end is connected the other end (R1) of above-mentioned input end and the other end is connected an above-mentioned end (S1) and the middle autotransformer (TR1) that has a tap at least of above-mentioned input end; Have an end be connected above-mentioned autotransformer an above-mentioned end elementary winding (P) and and this elementary winding (P) carry out magnetic coupling and be connected the above-mentioned other end (R1) of above-mentioned input end and the other end (R2) of above-mentioned output terminal between the transformer (TR2) of secondary winding (S); And the switch (SW1) that the connecting object of the other end of above-mentioned elementary winding (P) is transformed into any end of an above-mentioned end of above-mentioned autotransformer (TR1), above-mentioned tap or the above-mentioned other end.

According to the present invention, the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, be transformed into any end of an end, tap or the other end of autotransformer by connecting object, can make single-phase-two-wire system AC power be two-stage at least and descend the other end of elementary winding.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be the above-mentioned ac voltage control device of pair of output (R2, S2) that comprises the single-phase-two-wire system AC power of a pair of input end (R1, S1) of input single-phase-two-wire system AC power and voltage decline that output makes this AC power or rising, comprise the lead-in wire (c1) that the end (S1) of above-mentioned input end links to each other with an end (S2) of above-mentioned output terminal; One end is connected the other end (R1) of above-mentioned input end and the other end is connected an above-mentioned end (S1) and the middle autotransformer (TR1) that has a tap at least of above-mentioned input end; Have elementary winding (P) and and this elementary winding (P) carry out magnetic coupling and be connected the above-mentioned other end (R1) of above-mentioned input end and the other end (R2) of above-mentioned output terminal between the transformer (TR2) of secondary winding (S); Change the 1st switch (SW2) of the connecting object of the end of above-mentioned elementary winding (P) and the other end; And the 2nd switch (SW1) of changing the connecting object of above-mentioned the 1st switch (SW2), above-mentioned the 1st switch (SW2) makes an end of above-mentioned elementary winding (P) or the above-mentioned end that the other end is connected to above-mentioned autotransformer (TR1), make the other end or an end of the above-mentioned elementary winding (P) of an above-mentioned end that is not connected above-mentioned autotransformer (TR1) be connected to above-mentioned the 2nd switch (SW1) simultaneously, above-mentioned the 2nd switch (SW1) makes an end of the above-mentioned elementary winding (P) that is connected above-mentioned the 1st switch (SW2) or the above-mentioned end that the other end is connected to above-mentioned autotransformer (TR1), above-mentioned tap, or any end of the above-mentioned other end.

According to the present invention, the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, by an end (or other end) of elementary winding being connected to an end of autotransformer, the other end (or an end) of elementary winding that will not be connected an end of autotransformer simultaneously is transformed into any end of an end, tap or the other end of autotransformer, can make single-phase-two-wire system AC power be two-stage at least and descend or rise.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be to comprise that a pair of input end (R1, S1) of input single-phase-two-wire system AC power and the voltage that output makes this AC power descend or the above-mentioned ac voltage control device of the pair of output (R2, S2) of the single-phase-two-wire system AC power of rising, comprise: the lead-in wire (c1) that an end (S1) of above-mentioned input end links to each other with an end (S2) of above-mentioned output terminal; One end is connected the other end (R1) of above-mentioned input end and the other end is connected an above-mentioned end (S1) and the middle autotransformer (TR1) that has a tap at least of above-mentioned input end; Have elementary winding (P) and and this elementary winding (P) carry out magnetic coupling and be connected the described other end (R1) of above-mentioned input end and the other end (R2) of above-mentioned output terminal between the transformer (TR2) of secondary winding (S); And the switch (SW3) of changing the connecting object of the end of above-mentioned elementary winding (P) and the other end, above-mentioned switch (SW3) makes an end of above-mentioned elementary winding (P) be connected to any end of an above-mentioned end of above-mentioned autotransformer (TR1), above-mentioned tap or the above-mentioned other end, makes the other end of above-mentioned elementary winding (P) be connected to any end of an above-mentioned end of above-mentioned autotransformer (TR1), above-mentioned tap or the above-mentioned other end simultaneously.

According to the present invention, the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, be connected to any end of an end, tap or the other end of autotransformer by a end with elementary winding, simultaneously the elementary winding other end is connected to any end of an end, tap or the other end of autotransformer, can makes single-phase-two-wire system AC power be two-stage at least and descend or rise.

The ac voltage control device that is applicable to above-mentioned single-phase-two-wire system power supply mode preferably constitutes and also comprises between the above-mentioned end and the above-mentioned other end that is connected above-mentioned autotransformer (TR1), between an above-mentioned end and the above-mentioned tap, or between any two ends between the above-mentioned other end and the above-mentioned tap to monitor the voltage monitoring circuit (VS) of voltage between two ends, this voltage monitoring circuit (VS) is controlled above-mentioned switch (SW1 according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation, above-mentioned the 1st switch (SW2) and the 2nd switch (SW1), or SW3) conversion.

And, be applicable to that the ac voltage control device of above-mentioned single-phase-two-wire system power supply mode preferably recently changes the span of control limit of control of the output voltage of above-mentioned AC power by the above-mentioned secondary winding (S) and the number of turn of above-mentioned elementary winding (P).According to such structure,, can control the output voltage of AC power by changing the turn ratio (n2/n1) of Secondary winding of transformer and elementary winding.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be three input end (R1 that comprise input three-phase three-wire system AC power, S1, T1) and output descends the voltage of this AC power or three output terminal (R2 of the AC power of the three-phase three-wire system that rises, S2, T2) above-mentioned ac voltage control device, every alternating voltage control module (4a that comprises mutually of above-mentioned three-phase alternating current, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprise: an end is connected the above-mentioned input end (R1 of a phase, S1, T1) and the other end is connected and out of phase another the above-mentioned input end of this input end (T1, R1, S1), and the middle autotransformer (TR11 that has a tap at least, TR12, TR13); Have elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (S21, S22, S23); And the interconnected relationship of an above-mentioned end, above-mentioned tap and the above-mentioned other end of an end of above-mentioned elementary winding (P21, P22, P23) and the other end and above-mentioned autotransformer (TR11, TR12, TR13) selected the switch (SW1, SW1 and SW2 or SW3) changed.

According to the present invention, AC supply voltage with two lines in the three-phase three-wire system AC power, i.e. line voltage, autotransformer through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, by the interconnected relationship of an end, tap and the other end of an end of elementary winding and the other end and these autotransformers is changed, can make the AC power of three-phase three-wire system be two-stage at least and descend or rise.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be three input end (R1 that comprise input three-phase three-wire system AC power, S1, T1) and output make three output terminal (R2 of the AC power of the three-phase three-wire system that the voltage of this AC power descends, S2, T2) above-mentioned ac voltage control device, every alternating voltage control module (4a that comprises mutually of above-mentioned three-phase alternating current, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprise that an end is connected the above-mentioned input end (R1 of a phase, S1, T1) and the other end is connected and out of phase another the above-mentioned input end of this input end (T1, S1, R1), and the middle autotransformer (TR11 that has a tap at least, TR12, TR13); Have an end be connected above-mentioned autotransformer (TR11, TR12, TR13) an above-mentioned end elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (S21, S22, S23); And the switch (SW1) that the connecting object of the other end of above-mentioned elementary winding (P21, P22, P23) is transformed into any end of an above-mentioned end of above-mentioned autotransformer, above-mentioned tap or the above-mentioned other end.

According to the present invention, with the AC supply voltage of two lines in the AC power of three-phase three-wire system, i.e. line voltage, autotransformer through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, be transformed into any end of an end, tap or the other end of autotransformer by connecting object, can make the three-phase three-wire system AC power be two-stage at least and descend the other end of elementary winding.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be three input end (R1 that comprise input three-phase three-wire system AC power, S1, T1) and output descends the voltage of this AC power or three output terminal (R2 of the three-phase three-wire system AC power that rises, S2, T2) above-mentioned ac voltage control device, every alternating voltage control module (4a that comprises mutually of above-mentioned three-phase alternating current, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprise the above-mentioned input end (R1 that an end is connected a phase, S1, T1) and the other end is connected and out of phase another the above-mentioned input end of this input end (T1, S1, R1), and the middle autotransformer (TR11 that has a tap at least, TR12, TR13); Have elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (S21, S22, S23); Change the 1st switch (SW2) of the connecting object of the end of above-mentioned elementary winding (P21, P22, P23) and the other end; And the 2nd switch (SW1) of changing the connecting object of above-mentioned the 1st switch (SW2), above-mentioned the 1st switch (SW2) makes above-mentioned elementary winding (P21, P22, P23) a end or the other end are connected to above-mentioned autotransformer (TR11, TR12, TR13) an above-mentioned end, make simultaneously and be not connected above-mentioned autotransformer (TR11, TR12, the above-mentioned elementary winding (P21 of an above-mentioned end TR13), P22, P23) the other end or an end are connected to above-mentioned the 2nd switch (SW1), and above-mentioned the 2nd switch (SW1) makes the above-mentioned elementary winding (P21 that is connected the 1st switch (SW2), P22, P23) a end or the other end are connected to above-mentioned autotransformer (TR11, TR12, TR13) an above-mentioned end, above-mentioned tap, or any end of the above-mentioned other end.

According to the present invention, AC supply voltage with two lines in the three-phase three-wire system AC power, i.e. line voltage, autotransformer through having a tap at least is transformed to the end at autotransformer, centre tap, at least the three-way AC power of other end output, by an end (or other end) of elementary winding being connected to an end of autotransformer, the other end (or an end) of elementary winding that will not be connected an end of autotransformer simultaneously is transformed into an end of autotransformer, any end of the tap or the other end can make the three-phase three-wire system AC power be two-stage at least and descend or rise.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be three input end (R1 that comprise input three-phase three-wire system AC power, S1, T1) and output descends the voltage of this AC power or three output terminal (R2 of the three-phase three-wire system AC power that rises, S2, T2) above-mentioned ac voltage control device, every alternating voltage control module (4a that comprises mutually of above-mentioned three-phase alternating current, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprise the above-mentioned input end (R1 that an end is connected a phase, S1, T1) and the other end is connected and out of phase another the above-mentioned input end of this input end (T1, S1, R1), and the middle autotransformer (TR11 that has a tap at least, TR12, TR13); Have elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (S21, S22, S23); And the switch (SW3) of changing the connecting object of the end of above-mentioned elementary winding (P21, P22, P23) and the other end, above-mentioned switch (SW3) makes an end of above-mentioned elementary winding (P21, P22, P23) be connected to any end of an above-mentioned end, above-mentioned tap or the above-mentioned other end of above-mentioned autotransformer (TR11, TR12, TR13), makes the other end of above-mentioned elementary winding (P21, P22, P23) be connected to any end of an above-mentioned end, above-mentioned tap or the above-mentioned other end of above-mentioned autotransformer (TR11, TR12, TR13) simultaneously.

According to the present invention, AC supply voltage with two lines in the three-phase three-wire system AC power, i.e. line voltage, autotransformer through having a tap at least is transformed to the end at autotransformer, centre tap, at least the three-way AC power of other end output, be connected to an end of autotransformer by a end with elementary winding, any end of the tap or the other end, simultaneously the other end of elementary winding is connected to an end of autotransformer, tap, or any end of the other end, can make the three-phase three-wire system AC power be two-stage at least and descend or rise.

The ac voltage control device that is applicable to above-mentioned three-phase three-wire system power supply mode preferably constitutes and also comprises and be connected above-mentioned autotransformer (TR11, TR12, TR13) between the above-mentioned end and the above-mentioned other end, between an above-mentioned end and the above-mentioned tap, or between any two ends between the above-mentioned other end and the above-mentioned tap to monitor the voltage monitoring circuit (VS) of voltage between two ends, above-mentioned voltage monitoring circuit (VS) is controlled above-mentioned switch (SW1 according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation, above-mentioned the 1st switch (SW2) and the 2nd switch (SW1), or SW3) conversion.

Be applicable to that the ac voltage control device of above-mentioned three-phase three-wire system power supply mode preferably recently changes the span of control limit of control of the output voltage of above-mentioned AC power by the above-mentioned secondary winding (S21, S22, S23) and the number of turn of above-mentioned elementary winding (P21, P22, P23).According to such structure,, can control the output voltage of AC power by changing the turn ratio (n2/n1) of Secondary winding of transformer and elementary winding.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be to comprise three input ends (R1, S1, T1) and the neutral line input end (N1) of input three-phase four-wire system AC power and export the voltage decline that makes this AC power or three output terminals (R2, S2, T2) of the three-phase four-wire system AC power that rises and the above-mentioned ac voltage control device of neutral line output terminal (N2), comprise the concentric line (c1) that above-mentioned neutral line input end (N1) links to each other with above-mentioned neutral line output terminal (N2); And the alternating voltage control module of every phase of above-mentioned three-phase alternating current (4a, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprises the above-mentioned input end (R1, S1, T1) that an end is connected a phase and the other end is connected above-mentioned concentric line (c1) and the middle autotransformer (TR11, TR12, TR13) that has a tap at least; Have elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (S21, S22, S23); And the interconnected relationship of an above-mentioned end, above-mentioned tap and the above-mentioned other end of an end of above-mentioned elementary winding (P21, P22, P23) and the other end and above-mentioned autotransformer (TR11, TR12, TR13) selected the switch (SW1, SW1 and SW2 or SW3) changed.

According to the present invention, with line of electric force in the three-phase four-wire system AC power and the AC supply voltage between the neutral line, i.e. phase voltage, autotransformer through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, by the interconnected relationship of an end, tap and the other end of an end of elementary winding and the other end and these autotransformers is changed, can make the three-phase four-wire system AC power be two-stage at least and descend or rise.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be to comprise that three input ends (R1, S1, T1) of input three-phase four-wire system AC power and neutral line input end (N1) and output make three output terminals (R2, S2, T2) of three-phase three-wire system AC power of voltage decline of this AC power and the above-mentioned ac voltage control device of neutral line output terminal (N2), comprise the concentric line (c1) that above-mentioned neutral line input end (N1) links to each other with above-mentioned neutral line output terminal (N2); And the alternating voltage control module of every phase of above-mentioned three-phase alternating current (4a, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprises that an end is connected the above-mentioned input end of a phase (R1, S1, T1) and the other end is connected above-mentioned concentric line (c1) and the middle autotransformer (TR11, TR12, TR13) that has a tap at least; Have an end be connected above-mentioned autotransformer (TR11, TR12, TR13) an above-mentioned end elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (P21, P22, P23); And the switch (SW1) of any end that the connecting object of the other end of above-mentioned elementary winding (P21, P22, P23) is transformed into an above-mentioned end, above-mentioned tap or the above-mentioned other end of above-mentioned autotransformer (TR11, TR12, TR13).

According to the present invention, with line of electric force in the three-phase four-wire system AC power and the AC supply voltage between the neutral line, i.e. phase voltage, autotransformer through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, be transformed into any end of an end, tap or the other end of autotransformer by connecting object, can make the three-phase four-wire system AC power be two-stage at least and descend the other end of elementary winding.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be to comprise three input ends (R1, S1, T1) and the neutral line input end (N1) of input three-phase four-wire system AC power and export the voltage decline that makes this AC power or three output terminals (R2, S2, T2) of the three-phase four-wire system AC power that rises and the above-mentioned ac voltage control device of neutral line output terminal (N2), comprise the concentric line (c1) that above-mentioned neutral line input end (N1) links to each other with above-mentioned neutral line output terminal (N2); And the alternating voltage control module of every phase of above-mentioned three-phase alternating current (4a, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprises the above-mentioned input end (R1, S1, T1) that an end is connected a phase and the other end is connected above-mentioned concentric line (c1) and the middle autotransformer (TR11, TR12, TR13) that has a tap at least; Have elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (P21, P22, P23); Change the 1st switch (SW2) of the connecting object of the end of above-mentioned elementary winding (P21, P22, P23) and the other end; And the 2nd switch (SW1) of changing the connecting object of above-mentioned the 1st switch (SW2), above-mentioned the 1st switch (SW2) makes above-mentioned elementary winding (P21, P22, P23) a end or the other end are connected to above-mentioned autotransformer (TR11, TR12, TR13) an above-mentioned end, make simultaneously and be not connected above-mentioned autotransformer (TR11, TR12, the above-mentioned elementary winding (P21 of an above-mentioned end TR13), P22, P23) the other end or an end are connected to above-mentioned the 2nd switch (SW1), and above-mentioned the 2nd switch (SW1) makes the above-mentioned elementary winding (P21 that is connected the 1st switch (SW2), P22, P23) a end or the other end are connected to above-mentioned autotransformer (TR11, TR12, TR13) an above-mentioned end, above-mentioned tap, or any end of the above-mentioned other end.

According to the present invention, with line of electric force in the three-phase four-wire system AC power and the AC supply voltage between the neutral line, i.e. phase voltage, autotransformer through having a tap at least is transformed to an end of autotransformer, centre tap, at least the three-way AC power of other end output, by an end (or other end) of elementary winding being connected to an end of autotransformer, the other end (or an end) of elementary winding that will not be connected an end of autotransformer simultaneously is transformed into an end of autotransformer, any end of the tap or the other end can make the three-phase four-wire system AC power be two-stage at least and descend or rise.

Have following characteristics according to the ac voltage control device relevant with another aspect of the present invention, be to comprise three input ends (R1, S1, T1) and the neutral line input end (N1) of input three-phase four-wire system AC power and export the voltage decline that makes this AC power or three output terminals (R2, S2, T2) of the three-phase four-wire system AC power that rises and the above-mentioned ac voltage control device of neutral line output terminal (N2), comprise the concentric line (c1) that above-mentioned neutral line input end (N1) links to each other with above-mentioned neutral line output terminal (N2); And the alternating voltage control module of every phase of above-mentioned three-phase alternating current (4a, 4b, 4c), each alternating voltage control module (4a, 4b, 4c) comprises the above-mentioned input end (R1, S1, T1) that an end is connected a phase and the other end is connected above-mentioned concentric line (c1) and the middle autotransformer (TR11, TR12, TR13) that has a tap at least; Have elementary winding (P21, P22, P23) and carry out magnetic coupling with this elementary winding (P21, P22, P23) and be connected above-mentioned one mutually above-mentioned input end (R1, S1, T1) and and the above-mentioned output terminal (R2, S2, T2) of this input end homophase between the transformer (TR21, TR22, TR23) of secondary winding (S21, S22, S23); And the switch (SW3) of changing the connecting object of the end of above-mentioned elementary winding (P21, P22, P23) and the other end, above-mentioned switch (SW3) makes an end of above-mentioned elementary winding (P21, P22, P23) be connected to any end of an above-mentioned end, above-mentioned tap or the above-mentioned other end of above-mentioned autotransformer (TR11, TR12, TR13), makes the other end of above-mentioned elementary winding (P21, P22, P23) be connected to any end of an above-mentioned end, above-mentioned tap or the above-mentioned other end of above-mentioned autotransformer (TR11, TR12, TR13) simultaneously.

According to the present invention, with line of electric force in the three-phase four-wire system AC power and the AC supply voltage between the neutral line, i.e. phase voltage, autotransformer through having a tap at least is transformed to the end at autotransformer, centre tap, at least the three-way AC power of other end output, be connected to an end of autotransformer by a end with elementary winding, any end of the tap or the other end, simultaneously the other end of elementary winding is connected to an end of autotransformer, tap, or any end of the other end, can make the three-phase four-wire system AC power be two-stage at least and descend or rise.

The ac voltage control device that is applicable to above-mentioned three-phase four-wire power supply mode preferably constitutes and also comprises and be connected above-mentioned autotransformer (TR11, TR12, TR13) between the above-mentioned end and the above-mentioned other end, between an above-mentioned end and the above-mentioned tap, or between any two ends between the above-mentioned other end and the above-mentioned tap to monitor the voltage monitoring circuit (VS) of voltage between two ends, above-mentioned voltage monitoring circuit (VS) is controlled above-mentioned switch (SW1 according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation, above-mentioned the 1st switch (SW2) and the 2nd switch (SW1), or SW3) conversion.

Be applicable to that the ac voltage control device of above-mentioned three-phase four-wire power supply mode preferably recently changes the span of control limit of control of the output voltage of above-mentioned AC power by the above-mentioned secondary winding (S21, S22, S23) and the number of turn of above-mentioned elementary winding (P21, P22, P23).According to such structure,, can control the output voltage of AC power by changing the turn ratio (n2/n1) of Secondary winding of transformer and elementary winding.

According to ac voltage control device of the present invention, AC power between two lines of the single-phase-two-wire system of making, three-phase three-wire system or three-phase four-wire system, autotransformer through having a tap at least is transformed to the three-way at least AC power that an end, centre tap, the other end at autotransformer are exported, by the interconnected relationship of an end, tap and the other end of an end of elementary winding and the other end and these autotransformers is changed, can make AC power be two-stage at least and descend or rise.

And, owing to monitor any one voltage of the three-way at least AC power of autotransformer conversion through having a tap at least, the other end of Secondary winding of transformer is linked to each other with any end of an end, tap or the other end of autotransformer, therefore can realize the control of output voltage by easy method, can have the increase of the volume of inhibition ac voltage control device own and the effect that cost rises.

And then, according to ac voltage control device of the present invention, because the enough easy methods of energy, realization is 2 stepped conversion and control, so that under the supply voltage situation bigger with respect to the ascensional range of reference voltage or fall, strengthen fall or ascensional range, and, under the supply voltage situation smaller with respect to the ascensional range of reference voltage or fall, dwindle fall or ascensional range, therefore can and prolong equipment life and make very big contribution equipment steady operation, increase energy-saving effect.

Description of drawings

Fig. 1 is the ac voltage control device structural representation that the 1st embodiment of the present invention is used in expression.

Fig. 2 be illustrated in the ac voltage control device shown in Figure 1, the turn ratio (n2/n1) of transformer is supply voltage between 0.05 o'clock input end R1-S1 and the waveform of the relation of the output voltage between output terminal R2-S2.

Fig. 3 is the ac voltage control device structural representation that the 2nd embodiment of the present invention is used in expression.

Fig. 4 be illustrated in the ac voltage control device shown in Figure 3, the turn ratio (n2/n1) of transformer is supply voltage between 0.05 o'clock input end R1-S1 and the waveform of the relation of the output voltage between output terminal R2-S2.

Fig. 5 is the ac voltage control device structural representation that the 3rd embodiment of the present invention is used in expression.

Fig. 6 is the ac voltage control device structural representation that the 4th embodiment of the present invention is used in expression.

Fig. 7 is the ac voltage control device structural representation that the 5th embodiment of the present invention is used in expression.

Label declaration

1,2,3,4,5 ac voltage control devices

R1, S1, T1, N1 input end

R2, S2, T2, N2 output terminal

SW1, SW2, SW3 switch

TR1, TR11, TR12, TR13 autotransformer

TR2, TR21, TR22, TR23 transformer

P, P21, the elementary winding of P22, P23

S, S21, S22, S23 secondary winding

10,20,30,41,42,43 control parts

4a, 4b, 4c alternating voltage control module

The VS voltage monitoring circuit

Embodiment

Below, describe the embodiment of ac voltage control device of the present invention with reference to the accompanying drawings in detail.Also have, the present invention is not limited to this embodiment.

The 1st embodiment

Fig. 1 is the ac voltage control device structural representation of expression the 1st embodiment.This ac voltage control device 1 input side comprise input single-phase-two-wire system AC power a pair of input end, be input end R1 and input end S1, comprise pair of output that the output voltage of the single-phase-two-wire system that output voltage is descended exports, be output terminal R2 and output terminal S2 at output terminal.

So-called single-phase-two-wire system supply voltage is the power supply mode of the source power supply of the interchange 100V that for example also uses at average family or interchange 200V.In this mode, for example at input end R1 input 200V, input end S1 ground connection is so just added the AC supply voltage of 200V between input end R1-S1.

In Fig. 1, input end R1 and input end S1 and autotransformer TR1 are connected in parallel.Specifically be exactly, the end of autotransformer TR1 is connected to input end R1, the other end is connected to input end S1.Autotransformer TR1 has a tap at least between two-terminal.So the voltage between autotransformer TR1 two-terminal equates with AC supply voltage (for example 200V) between input end R1 and the input end S1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of three-wire system like this.

Connect lead-in wire a, b and c in an end, the other end and the tap of autotransformer TR1, the three-wire system AC power of conversion is input to control part 10 described later as mentioned above.Control part 10 comprises voltage monitoring circuit VS and switch SW 1.

The end of voltage monitoring circuit VS connects lead-in wire a, and the other end connects lead-in wire b.Between input end R1 and output terminal R2, insert transformer TR2 with elementary winding P and secondary winding S.Specifically be exactly, the end of secondary winding S connects input end R1, and the other end connects output terminal R2.Carry out the end of magnetic-coupled elementary winding P with this secondary winding S, be connected to the end (input end R1) of autotransformer TR1 by lead-in wire d, lead-in wire a, the other end is connected to the basic point of switch SW 1 by lead-in wire e.Switch SW 1 has changeover contact u1, u2, u3, is the switch that carries out single channel three contacts of conversion and control according to the control signal of voltage monitoring circuit output.The changeover contact u1 of this switch SW 1 is connected to the end (input end R1) of autotransformer TR1 by lead-in wire a, and be connected to the end of elementary winding P by lead-in wire d, changeover contact u2 is connected to the tap of autotransformer TR1 by lead-in wire c, and changeover contact u3 connects the other end (input end S1) of autotransformer TR1 by lead-in wire b.Also having, though switch SW 1 is assumed to be the electronic switch that uses semiconductor element etc., also can be can be by the mechanical type switch of changing from the control signal of voltage monitoring circuit VS.

The stain that is shown in transformer TR2 represents to respond to because of the mutual inductance effect direction (polarity) of the induced voltage on each winding.I.e. expression, when adding as the voltage of positive direction outside the stain side of elementary winding P, because of the mutual inductance effect, the stain side that induces secondary winding S on secondary winding S is the voltage of positive direction; When adding as the voltage of negative direction outside the stain side of elementary winding P, because of the mutual inductance effect, also the stain side of inductive secondary winding S is the voltage of negative direction on secondary winding S.

The action of this ac voltage control device 1 then, is described.At first, in Fig. 1, consider under switch SW 1 is connected to the state (hereinafter referred to as (the 1st state)) of changeover contact u1, between input end R1-S1, add the situation of AC power.At this moment, the elementary winding P of transformer TR2 is in short-circuit condition by lead-in wire d, switch SW 1 and lead-in wire e, additional power source voltage not on elementary winding P.So carrying out can not producing electromotive force on the magnetic-coupled secondary winding S, between input end R1 and output terminal R2, be in pass-through state, the voltage of input directly exported with this elementary winding P.

Now, when the AC supply voltage that will be added between the input end R1-S1 is decided to be Vi, the voltage that is created in output terminal R2-S2 is decided to be V11, then can be expressed as,

V11＝Vi (1)

Then, consider to be connected under the state (hereinafter referred to as (the 2nd state)) of changeover contact u2, between input end R1-S1, add the situation of AC power in switch SW 1.At this moment, the end of the elementary winding P of transformer TR2 is connected to the end (input end R1) of autotransformer TR1 by lead-in wire d, a, and the other end is connected to the tap of autotransformer TR1 by lead-in wire e, switch SW 1, lead-in wire c.Now, when the number of turn with the elementary winding P of transformer TR2 is decided to be n1, the number of turn of secondary winding S is decided to be n2, the tap of autotransformer TR1 is decided to be mid-point tap, then be added to 1/2 of AC supply voltage Vi between the input end R1-S1 and be added to the two ends of the secondary winding P of transformer TR2, produce the voltage of (n2/n1) Vi/2 at the two ends of secondary winding S.And, if note the position of the stain of transformer TR2, because to the coiling starting point (stain side) of elementary winding P when adding the voltage of positive direction, coiling terminal point current potential with secondary winding S is a benchmark, just produce positive current potential in coiling starting point (stain side), so the voltage of outgoing side is created in that part of voltage on this secondary winding S with regard to descending.So under the 2nd state, the voltage that results from output terminal R2-S2 just descends.

At this moment, when the voltage that will result from output terminal R2-S2 is decided to be V21, then can be expressed as

V21＝Vi-(n2/n1)·Vi/2 (2)

And then, consider to be connected under the state (hereinafter referred to as (the 3rd state)) of changeover contact u3 in switch SW 1, between input end R1-S1, add the situation of AC power.At this moment, because the end of the elementary winding P of transformer TR2 is connected to the end (input end R1) of transformer TR1 by lead-in wire d, lead-in wire a, the other end is connected to the other end (input end S1) of autotransformer TR1 by lead-in wire e, switch SW 1, lead-in wire b, therefore the outer AC supply voltage Vi that is added between the input end R1-S1 is applied to the two ends of elementary winding P, just produces the voltage of (n2/n1) Vi at the two ends of secondary winding S.And, if note the position of the stain of transformer TR2, then identical with the 2nd state, because to the coiling starting point (stain side) of elementary winding P when adding the voltage of positive direction, coiling terminal point current potential with secondary winding S is a benchmark, just produce positive current potential in coiling starting point (stain side), so the voltage of outgoing side is created in that part of voltage on this secondary winding S with regard to descending.So under the 3rd state, the voltage that results from output terminal R2-S2 just descends.

At this moment, when the voltage that will result from output terminal R2-S2 is decided to be V31, then can be expressed as

V31＝Vi-(n2/n1)·Vi (3)

According to formula as implied above (1)～(3) as can be known, position by gauge tap SW1 changeover contact, the connecting object of the elementary winding P other end of transformer TR2 is transformed into an end, the tap of autotransformer TR1, any end of the other end, can be two-stage control (step-down) single-phase-two-wire system AC power.

In this embodiment, carry out the control of this output voltage by voltage monitoring circuit VS.That is, voltage monitoring circuit VS monitors the magnitude of voltage of (between the input end R1-S1) between the two ends of autotransformer TR1, according to the voltage difference of the reference voltage of this monitor voltage and regulation, switch SW1 successively.Explanation is exactly as doing qualitatively, under the monitor voltage situation higher than reference voltage, when the voltage difference (absolute value) of monitor voltage and reference voltage is bigger, then switch SW 1 is transformed on the changeover contact u3, and the other end of elementary winding P just is connected to the other end (input end S1) of autotransformer TR1.Along with the voltage difference (absolute value) of monitor voltage and reference voltage is more and more littler, switch SW 1 is transformed on the changeover contact u2, and the other end of elementary winding P just is connected to the tap of autotransformer TR1.Then, when the voltage difference (absolute value) of monitor voltage and reference voltage becomes more hour, then switch SW 1 is transformed on the changeover contact u1, and the other end of elementary winding P just is connected to the end (input end R1) of autotransformer TR1, directly output supply voltage.

So as can be known, come conversion controling switch SW1, can suitably control the output voltage of the AC power of (step-down) single-phase-two-wire system according to the size of the voltage difference (absolute value) of monitor voltage that monitors by voltage monitoring circuit VS and reference voltage.

In addition also as can be known, according to formula as implied above (1)～(3), suitably set the turn ratio (n2/n1) of elementary winding P and the secondary winding S of transformer TR2, by changing the span of control limit of control of the output voltage of single-phase-two-wire system AC power like this.

For example,, make the amplitude of fluctuation of service voltage also change because of the difference of power condition, but if in the little zone of variation in voltage, as long as turn ratio is set at less; On the contrary, if in the big zone of variation in voltage, then as long as turn ratio (n2/n1) is set at more greatly.

Fig. 2 is the curve map of an example of Control of Voltage of the ac voltage control device 1 of expression the 1st embodiment.Also have, it is the supply voltage (V) between 0.05 o'clock the input end R1-S1 and the relation of the output voltage (V) between the output terminal R2-S2 that the curve shown in this figure is shown in turn ratio (n2/n1) in the power supply mode of single-phase 200V, two-wire system.In Fig. 2, voltage monitoring circuit VS is under the supply voltage situation higher than assigned voltage, and conversion controling switch SW1 makes the other end that connects the elementary winding P of switch SW 1 changeover contact u1 under the original state be connected to the changeover contact u2 of switch SW 1.Then, under the situation that supply voltage further increases with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u3 of switch SW 1.Then, the state that increases from this voltage, under the situation that supply voltage descends with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u2 of switch SW 1.Under the situation of supply voltage further decline with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u1 of switch SW 1.Like this, this ac voltage control device 1 can be exported suitable output voltage according to the change of supply voltage.

Also have, in this embodiment, be to adopt voltage monitoring circuit VS to be connected in (between the input end R1-S1) between the two ends of autotransformer TR1 in parallel, monitor the structure of the magnitude of voltage that between these two ends, produces, be limited to this connected mode but have more than, even be connected in parallel between the end of autotransformer TR1 for example and the tap or under the situation between the other end and the tap, also can realize the control of output voltage.

As mentioned above, ac voltage control device according to this embodiment, because the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the end at autotransformer, centre tap, at least the three-way AC power of other end output, voltage monitoring circuit monitors between three terminals of autotransformer, promptly between one end-other end, between one end-tap, and any one voltage between the other end-tap, make the other end of the elementary winding of transformer be connected to an end of autotransformer according to this monitor voltage, tap, or any end of the other end, therefore can realize the control of output voltage by easy method, the volume that can suppress ac voltage control device itself, scale, and the increase of complicacy, rise that can the suppression equipment price.And, can use the power supplier of existing single-phase-two-wire system effectively, do not reduce the reliability of device itself yet.Further, owing to can realize the two-stage conversion and control, make supply voltage with respect to the bigger situation of the ascensional range of reference voltage under, strengthen the fall of this voltage, and supply voltage with respect to the smaller situation of the ascensional range of reference voltage under, dwindle the fall of this voltage, therefore can and prolong equipment life and make a significant contribution load steady operation, increase energy-saving effect.

The 2nd embodiment

Fig. 3 is ac voltage control device 2 structural representations of expression the 2nd embodiment.This ac voltage control device 2 is in the control part 10 of the 1st embodiment, adds the switch SW that is connected polarity 2 of the elementary winding P and the secondary winding S that are used for conversion transformer TR2, to constitute control part 20.Also have, the ac voltage control device 1 shown in the 1st embodiment of other structure and Fig. 1 is identical, and identical part is indicated identical label.

In the 1st embodiment, in order to strengthen energy-saving effect, the step-down output supply load that AC supply voltage is descended.In addition, in the not so good building of power condition, there is the action problem of unstable that makes equipment because of the decline of service voltage.In this case, on the contrary, be necessary to improve AC supply voltage.Here proposed the described ac voltage control device of Fig. 3, it has realized possessing the device that reduces or improve the dual-use function of AC supply voltage as realizing.

In Fig. 3, be connected to changeover contact w1, basic point v2 at the basic point v1 of switch SW 2 and be connected under the state of changeover contact w2, its connected mode is identical with the state of embodiment 1.Because action at this moment is identical with the action of the 1st embodiment, omits its explanation here.

Then, consider the state under the monitor voltage situation lower than reference voltage, the basic point v1 by voltage monitoring circuit VS switch SW 2 is connected to changeover contact w2, and basic point v2 is connected to changeover contact w1.This state is and the anti-phase state that is connected of the 1st embodiment, and the induced voltage direction of the secondary winding S induction that produces by elementary winding P and because of the mutual inductance effect is a polarity opposite during with the 1st embodiment.That is, when a side that is not the stain side of elementary winding P is responded to the voltage of positive direction, the voltage of the direction that the stain side induction of secondary winding S is negative; When a side that is not the stain side of elementary winding P is responded to the voltage of negative direction, the voltage of the direction that the stain side induction of secondary winding S is positive.Promptly make the voltage of the direction that AC supply voltage boosts in secondary winding S induction.

And, when switch SW 2 is in above-mentioned state, action when being connected to any point state of changeover contact u1, u2, u3 about switch SW 1, except the voltage of responding on the secondary winding S of transformer TR2 is to make the voltage of load step-up, identical with the 1st embodiment all.So, omit the explanation of action in detail, only be set forth in the voltage that each output terminal produces.

In the 1st state (switch SW 1 is connected to changeover contact u1), when the AC supply voltage that will be added between the input end R1-S1 is decided to be Vi, the voltage that is created between the output terminal R2-S2 is decided to be V11, then can be expressed as,

V11＝Vi (4)

Equally, in the 2nd state (switch SW 1 is connected to changeover contact u2), in the time will being created in voltage between the output terminal R2-S2 and being decided to be V21, then can be expressed as,

V21＝Vi+(n2/n1)·Vi/2 (5)

And then, in the 3rd state (switch SW 1 is connected to changeover contact u3), in the time will being created in voltage between the output terminal R2-S2 and being decided to be V31, then can be expressed as,

V21＝Vi+(n2/n1)·Vi (6)

Shown in following formula (4)～(6), the position of the changeover contact by gauge tap SW1 is connected to any end of an end, tap or the other end of autotransformer TR1 with the end of the elementary winding P of transformer TR2, can control (boosting) output voltage.

In this embodiment, the control of this output voltage is undertaken by voltage monitoring circuit VS.

That is, voltage monitoring circuit VS monitors the magnitude of voltage of (between the input end R1-S1) between autotransformer TR1 two ends, according to the voltage difference of the reference voltage of this monitor voltage and regulation switch SW1 successively.Under the monitor voltage situation lower than reference voltage, when the voltage difference of monitor voltage and reference voltage (absolute value) was bigger, switch SW 1 just was transformed into changeover contact u3.Along with the voltage difference (absolute value) of monitor voltage and reference voltage is more and more littler, switch SW 1 is transformed on the changeover contact u2, and when the voltage difference (absolute value) of monitor voltage and reference voltage becomes more hour, then switch SW 1 is transformed into changeover contact u1.

Above-mentioned explanation is the action specification when making ac voltage control device 2 play function as the boost in voltage device.In addition, the action when making ac voltage control device 2 play function as the voltage step-down device is as follows.At first, when monitor voltage was higher than reference voltage, by voltage monitoring circuit VS switch SW2, basic point v1 was connected to changeover contact w1, and basic point v2 is connected to changeover contact w2.Then, voltage monitoring circuit VS monitors the magnitude of voltage of (between the input end R1-S1) between autotransformer TR1 two ends, according to the voltage difference of this monitor voltage and reference voltage, and switch SW1 successively.Under the monitor voltage situation higher than reference voltage, when the voltage difference of monitor voltage and reference voltage (absolute value) was bigger, switch SW 1 just was transformed into changeover contact u3.Along with the voltage difference (absolute value) of monitor voltage and reference voltage is more and more littler, switch SW 1 is transformed on the changeover contact u2, and when the voltage difference (absolute value) of monitor voltage and reference voltage becomes more hour, then switch SW 1 is transformed into changeover contact u1.

Fig. 4 is the curve map of an example of Control of Voltage of the ac voltage control device 2 of expression the 2nd embodiment.Also have, it is the supply voltage (V) between 0.05 o'clock the input end R1-S1 and the relation of the output voltage (V) between the output terminal R2-S2 that the curve shown in this figure is shown in turn ratio (n2/n1) in the power supply mode of single-phase 200V, two-wire system.

In Fig. 4, when reducing output voltage, the basic point v1 of switch SW 2 is connected to changeover contact w1, and basic point v2 is connected to changeover contact w2.Voltage monitoring circuit VS is under the supply voltage situation higher than assigned voltage, and conversion controling switch SW1 makes the other end that connects the elementary winding P of switch SW 1 changeover contact u1 under the original state, is connected to the changeover contact u2 of switch SW 1.Then, under the situation that supply voltage further increases with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u3 of switch SW 1.Then, from the state of this step-down, under the situation that supply voltage descends with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u2 of switch SW 1.Under the situation of supply voltage further decline with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u1 of switch SW 1.Like this, this ac voltage control device 2 can be exported suitable (step-down) output voltage according to the change of supply voltage.

In addition, in Fig. 4, during boosted output voltages, the basic point v1 of switch SW 2 is connected to changeover contact w2, and basic point v2 is connected to changeover contact w1.Voltage monitoring circuit VS is under the supply voltage situation lower than assigned voltage, and conversion controling switch SW1 makes the other end that connects the elementary winding P of switch SW 1 changeover contact u1 under the original state be connected to the changeover contact u2 of switch SW 1.Then, under the situation of supply voltage further decline with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u3 of switch SW 1.Then, from this pressure-increasning state, under the situation that supply voltage rises with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u2 of switch SW 1.Under the situation of supply voltage further rising with respect to assigned voltage, voltage monitoring circuit VS conversion controling switch SW1 makes the other end of elementary winding P be connected to the changeover contact u1 of switch SW 1.Like this, this ac voltage control device 2 can be exported suitable (boosting) output voltage according to the change of supply voltage.

Also have, in this embodiment, be to adopt voltage monitoring circuit VS is connected in parallel (between the input end R1-S1) between the two ends of autotransformer TR1, monitors the structure at the magnitude of voltage that produces between these input ends, be limited to this connected mode but have more than, even be connected in parallel between the end of autotransformer TR1 for example and the tap or under the situation between the other end and the tap, also can realize the control of output voltage.

As mentioned above, ac voltage control device 2 according to this embodiment, because the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the end at autotransformer, centre tap, at least the three-way AC power of other end output, voltage monitoring circuit is controlled the 1st switch (aforesaid switch SW 2) according to the monitor voltage of AC power and the voltage difference of stipulated standard voltage, the other end that one end or the other end of elementary winding is connected to autotransformer, the other end or an end of elementary winding that will not be connected the other end of autotransformer simultaneously is connected to the 2nd switch (aforesaid switch SW 1), control the 1st switch according to the monitor voltage of AC power, make the connecting object of the other end of the elementary winding that is connected the 2nd switch or an end be connected to an end of autotransformer, tap, or any end of the other end, therefore can realize the control (boosting or step-down) of output voltage by easy method, the volume that can suppress ac voltage control device itself, scale, and the increase of complicacy, rise that can the suppression equipment price.And, owing to use easy method, can be implemented under the situation of step-down, make supply voltage with respect to the bigger situation of the ascensional range of reference voltage under, strengthen its fall, supply voltage with respect to the smaller situation of the ascensional range of reference voltage under, dwindle its fall, carry out such two-stage conversion and control, can also be implemented under the situation of boosting, make supply voltage with respect to the bigger situation of the fall of reference voltage under, strengthen its ascensional range, supply voltage with respect to the smaller situation of the fall of reference voltage under, dwindle its ascensional range, carry out such two-stage conversion and control, therefore can realize the ac voltage control device that correspondingly to tackle flexibly according to power condition.

The 3rd embodiment

Fig. 5 is the structural representation of the ac voltage control device 3 of expression the 3rd embodiment.This ac voltage control device 3 inserts switch SW 3, with switch SW 1, the SW2 that contains in the control part 20 that replaces the 2nd embodiment, form control part 30, utilize this switch SW 3, the elementary winding P of conversion transformer TR2 and the polarity that is connected of secondary winding S change the interconnected relationship of an end, tap and the other end of the end of elementary winding P and the other end and autotransformer TR1 simultaneously.Also have, other structure is identical with the ac voltage control device 1 shown in the 1st embodiment, same section is indicated same numeral represent.

In Fig. 5, the end of the elementary winding P of transformer TR2 is connected to the basic point x1 of switch SW 3 by lead-in wire d, and the other end is connected to the basic point x2 of switch SW 3 by lead-in wire e.In Fig. 5, being connected to changeover contact u1, basic point x2 at the basic point x1 of switch SW 3 is connected under the state of changeover contact u1, the elementary winding P of transformer TR2 is in short-circuit condition by lead-in wire d, switch SW 3 and lead-in wire e, additional power source voltage not on elementary winding P.So, carrying out not producing electromotive force on the magnetic-coupled secondary winding S, between input end R1 and output terminal R2, be in pass-through state with this elementary winding P, the magnitude of voltage of input is directly exported.

Then, the state of consideration under the monitor voltage situation higher, when the voltage difference (absolute value) of monitor voltage and reference voltage is smaller than reference voltage, it makes the basic point x1 of switch SW 3 be connected to changeover contact u1 by voltage monitoring circuit VS, and basic point x2 is connected to changeover contact u2.This state just become with the 2nd embodiment in the basic point v1 of switch SW 2 be connected to changeover contact w1, basic point v2 is connected to changeover contact w2, and switch SW 1 is connected to the identical circuit of state of changeover contact u2.That is, the voltage of responding at the secondary winding S of transformer TR2 is the voltage that makes load step-down, with respect to AC supply voltage Vi, and the voltage of (n2/n1) Vi/2 that descended.And then, the state of consideration under the monitor voltage situation higher, when the voltage difference (absolute value) of monitor voltage and reference voltage is bigger than reference voltage, it makes the basic point x1 of switch SW 3 be connected to changeover contact u1 by voltage monitoring circuit VS, and basic point x2 is connected to changeover contact u3.This state just become with the 2nd embodiment in the basic point v1 of switch SW 2 be connected to changeover contact w1, basic point v2 and be connected to the identical circuit of state that changeover contact w2 and switch SW 1 are connected to changeover contact u3.That is, with respect to AC supply voltage Vi, the voltage of (n2/n1) Vi that just descended.

The position of the changeover contact by such gauge tap SW3 connects any end of the end, tap or the other end that are transformed into autotransformer with the other end (side of lead-in wire e) of the elementary winding P of transformer TR2, can control (step-down) output voltage.The step-down control of this output voltage is carried out as described below by voltage monitoring circuit VS.

That is, voltage monitoring circuit VS monitors the magnitude of voltage of (between the input end R1-S1) between the two ends of autotransformer TR1, according to the voltage difference of the reference voltage of this monitor voltage and regulation, switch SW3 successively.Under the monitor voltage situation higher,, make the basic point x1 of switch SW 3 be connected to changeover contact u1 by voltage monitoring circuit VS than reference voltage.Then, when the voltage difference (absolute value) of monitor voltage and reference voltage is bigger,, make the basic point x2 of switch SW 3 be connected to changeover contact u3 by voltage monitoring circuit VS.Along with the voltage difference (absolute value) of monitor voltage and reference voltage is more and more littler, the basic point x2 of switch SW 3 is transformed on the changeover contact u2, further, when the voltage difference (absolute value) of monitor voltage and reference voltage becomes more hour, then the basic point x2 of switch SW 3 is transformed on the changeover contact u1.

Then, the state of consideration under the monitor voltage situation lower, when the voltage difference (absolute value) of monitor voltage and reference voltage is smaller than reference voltage, by voltage monitoring circuit VS, make the basic point x1 of switch SW 3 be connected to changeover contact u3, basic point x2 is connected to changeover contact u2.This state just become with the 2nd embodiment in the basic point v1 of switch SW 2 be connected to changeover contact w2, basic point v2 and be connected to the identical circuit of state that changeover contact w1 and switch SW 1 are connected to changeover contact u2.That is, the voltage of responding at the secondary winding S of transformer TR2 is the voltage that makes load step-up, with respect to AC supply voltage Vi, and the voltage of (n2/n1) Vi/2 that risen.And then, consideration is under the monitor voltage situation lower than reference voltage, and the state the when voltage difference of monitor voltage and reference voltage (absolute value) is bigger is by voltage monitoring circuit VS, make the basic point x1 of switch SW 3 be connected to changeover contact u3, basic point x2 is connected to changeover contact u1.This state just become with the 2nd embodiment in the basic point v1 of switch SW 2 be connected to changeover contact w2, basic point v2 and be connected to and transform the identical circuit of state that contact w1 and switch SW 1 are connected to changeover contact u3.That is, with respect to AC supply voltage Vi, the voltage of (n2/n1) Vi that just risen.

The position of the changeover contact by such gauge tap SW3 makes the other end (side of lead-in wire e) of the elementary winding P of transformer TR2 connect any end of the end, tap or the other end that are transformed into autotransformer, can control (boosting) output voltage.The control of boosting of this output voltage is carried out as described below by voltage monitoring circuit VS.

That is, voltage monitoring circuit VS monitors the magnitude of voltage of (between the input end R1-S1) between the two ends of autotransformer TR1, according to the voltage difference of the reference voltage of this monitor voltage and regulation, switch SW3 successively.Under the monitor voltage situation lower,, make the basic point x1 of switch SW 3 be connected to changeover contact u3 by voltage monitoring circuit VS than reference voltage.Then, when the voltage difference (absolute value) of monitor voltage and reference voltage is bigger,, make the basic point x2 of switch SW 3 be connected to changeover contact u1 by voltage monitoring circuit VS.Along with the voltage difference (absolute value) of monitor voltage and reference voltage is more and more littler, the basic point x2 of switch SW 3 is transformed on the changeover contact u2, further, when the voltage difference (absolute value) of monitor voltage and reference voltage becomes more hour, then the basic point x2 of switch SW 3 is transformed on the changeover contact u3.

Also have, in this embodiment, be to adopt to be connected in voltage monitoring circuit VS in parallel between the two ends of autotransformer TR1 (between the input end R1-S1) and to be used as monitoring structure at the magnitude of voltage that produces between these input two ends, be limited to this connected mode but have more than, even be connected in parallel between the end of autotransformer TR1 for example and the tap or under the situation between the other end and the tap, also can realize the control of output voltage.

As mentioned above, ac voltage control device 3 according to this embodiment, because the autotransformer of single-phase-two-wire system AC power through having a tap at least is transformed to the end at autotransformer, centre tap, at least the three-way AC power of other end output, voltage monitoring circuit comes gauge tap (aforesaid switch SW 3) according to the monitor voltage of AC power and the voltage difference of stipulated standard voltage, one end of elementary winding is connected to an end of autotransformer, tap, or any end of the other end, simultaneously the other end of elementary winding is connected to an end of autotransformer, tap, or any end of the other end, therefore can realize the control (boosting or step-down) of output voltage by easy method, the volume that can suppress ac voltage control device itself, scale, and the increase of complicacy, rise that can the suppression equipment price.And, because the enough easy methods of energy, under the situation of step-down, make supply voltage with respect to the bigger situation of the ascensional range of reference voltage under, strengthen its fall, supply voltage with respect to the smaller situation of reference voltage ascensional range under, dwindle its fall, realize such two-stage conversion and control, also under the situation of boosting, make supply voltage with respect to the bigger situation of the fall of reference voltage under, strengthen its ascensional range, supply voltage with respect to the smaller situation of the fall of reference voltage under, dwindle its ascensional range, realize such two-stage conversion and control, therefore can realize the ac voltage control device that correspondingly to tackle flexibly according to power condition.

The 4th embodiment

Fig. 6 is the structural representation of the ac voltage control device 4 of expression the 4th embodiment.This ac voltage control device comprises three input ends of input three-phase three-wire system AC power at input side, be input end R1, input end S1 and input end T1, comprise that at output terminal output makes three output terminals of the three-phase three-wire system output voltage of output voltage decline, i.e. output terminal R2, output terminal S2 and output terminal T2.

So-called three-phase three-wire system alternating voltage is the power supply mode of the source power supply of three-phase alternating current 100V or three-phase alternating current 200V for example.In this mode, for example between the input end R1-T1, between the input end R1-S1 and the AC supply voltage (line voltage) that adds 200V between the input end T1-S1.

In Fig. 6, input end R1 and input end T1 and autotransformer TR11 are connected in parallel.Specifically be exactly, the end of autotransformer TR11 is connected to input end R1, the other end is connected to input end T1.Autotransformer TR11 is identical with the autotransformer TR1 of above-mentioned the 1st to the 3rd embodiment, has a tap between two-terminal at least.So the voltage between autotransformer TR11 two-terminal equates with AC supply voltage (for example line voltage of 200V) between input end R1 and the input end T1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of three-wire system like this.

Be connected to lead-in wire a1, b1 and c1 in an end, the other end and the tap of autotransformer TR11, the three-wire system AC power of conversion is input to control part 41 as mentioned above.Here, for control part 41, can directly use control part 10, the control part 20 of the 1st to the 3rd embodiment, any one of control part 30.So, as the explanation of the control part 41 of present embodiment, the explanation that can quote the control part of these embodiments.

Between input end R1 and output terminal R2, insert transformer TR21 with elementary winding P21 and secondary winding S21.Specifically be exactly, the end of secondary winding S21 is connected to input end R1, and the other end is connected to output terminal R2.Carry out an end and the other end of magnetic-coupled elementary winding P21 with this secondary winding S21, be connected to control part 41 by lead-in wire d1 and lead-in wire e1.Here, being connected of switch in the end of the elementary winding P21 of transformer TR21 and the other end (lead-in wire d1 and e1) and the control part etc. because identical with being connected of the end of the elementary winding P of the transformer TR1 of each the 1st to the 3rd embodiment and the other end (d and e go between) and switch etc., and the switching motion of control part is also identical, so the explanation is here omitted.

As mentioned above, comprise the alternating voltage control module 4a of autotransformer TR11, control part 41 and transformer TR21, can realize the control (rising/decline of AC power) of the line voltage between the input end R1-T1 by formation.

In Fig. 6, autotransformer TR12 also is connected in parallel between input end S1 and input end R1.Specifically be exactly, the end of autotransformer TR12 is connected to input end S1, and the other end is connected to input end R1.Autotransformer TR12 is identical with above-mentioned TR11, voltage between the two ends of autotransformer TR12 equates with AC supply voltage (for example line voltage of 200V) between input end S1 and the input end R1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of line system like this.

Be connected to lead-in wire a2, b2 and c2 in an end, the other end and the tap of autotransformer TR12, the three-wire system AC power of conversion is input to control part 42 as mentioned above.Control part 42 uses the circuit identical with above-mentioned control part 41.

Between input end S1 and output terminal S2, insert transformer TR22 with elementary winding P22 and secondary winding S22.Specifically be exactly, the end of secondary winding S22 is connected to input end S1, and the other end is connected to output terminal S2.Carry out an end and the other end of magnetic-coupled elementary winding P22 with this secondary winding S22, be connected to control part 42 by lead-in wire d2 and lead-in wire e2.Here, the interior switch of elementary winding P22 one end of transformer TR22 and the other end (lead-in wire d2 and e2) and control part etc. be connected and the switching motion of control part identical with control part 41.

As mentioned above, comprise the alternating voltage control module 4b of autotransformer TR12, control part 42 and transformer TR22, can realize the control (rising/decline of AC power) of the line voltage between the input end S1-R1 by formation.

In Fig. 6, autotransformer TR13 also is connected in parallel between input end T1 and input end S1.Specifically be exactly, the end of autotransformer TR13 is connected to input end T1, and the other end is connected to input end S1.Autotransformer TR13 is identical with above-mentioned TR11, TR12, voltage between the two ends of autotransformer TR13 equates with AC supply voltage (for example line voltage of 200V) between input end T1 and the input end S1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of three-wire system like this.

Be connected to lead-in wire a3, b3 and c3 in an end, the other end and the tap of autotransformer TR13, the three-wire system AC power of conversion is input to control part 43 as mentioned above.Control part 43 uses the circuit identical with above-mentioned control part 41, control part 42.

Between input end T1 and output terminal T2, insert transformer TR23 with elementary winding P23 and secondary winding S23.Specifically be exactly, the end of secondary winding S23 is connected to input end T1, and the other end is connected to output terminal T2.Carry out an end and the other end of magnetic-coupled elementary winding P23 with this secondary winding S23, be connected to control part 43 by lead-in wire d3 and lead-in wire e3.Here, the interior switch of elementary winding P23 one end of transformer TR23 and the other end (lead-in wire d3 and e3) and control part etc. be connected and the switching motion of control part and control part 41, control part 42 identical.

As mentioned above, comprise the alternating voltage control module 4c of autotransformer TR13, control part 43 and transformer TR23, can realize the control (rising/decline of AC power) of the line voltage between the input end T1-S1 by formation.

Ac voltage control device 4 according to this embodiment, can with the ac voltage control device of the 1st to the 3rd embodiment with every be that unit forms control module mutually, realize the control (step-up/down) of three-phase three-wire system output voltage by easy method, can suppress the increase of volume, scale and the complicacy of ac voltage control device itself, rise that can the suppression equipment price.And, because the enough easy methods of energy, under the situation of step-down, make supply voltage with respect to the bigger situation of the ascensional range of reference voltage under, strengthen its fall, supply voltage with respect to the smaller situation of the ascensional range of reference voltage under, dwindle its fall, realize such two-stage conversion and control, also under the situation of boosting, make supply voltage with respect to the bigger situation of the fall of reference voltage under, strengthen its ascensional range, supply voltage with respect to the smaller situation of the fall of reference voltage under, dwindle its ascensional range, realize such two-stage conversion and control, therefore can realize the ac voltage control device that correspondingly to tackle flexibly according to power condition.

The 5th embodiment

Fig. 7 is the structural representation of the ac voltage control device 5 of expression the 5th embodiment.This ac voltage control device comprises three input ends and the neutral line input end of input three-phase four-wire system AC power at input side, be input end R1, input end S1, input end T1 and neutral line input end N1, comprise that at output terminal output makes three output terminals and neutral line output terminal, i.e. output terminal R2, output terminal S2, output terminal T2 and the neutral line output terminal N2 of three-phase four-wire system output voltage that output voltage descends.

So-called three-phase four-wire system supply voltage is the power supply mode that for example comprises the source power supply of the three-phase alternating current 100V of 3 line of electric force and 1 neutral line or three-phase alternating current 200V.In this input mode, for example between the input end R1-N1, between the input end S1-N1 and the AC supply voltage (phase voltage) that adds 200V between the input end T1-N1.

In Fig. 7, input end R1 and neutral line input end N1 and autotransformer TR11 are connected in parallel.Specifically be exactly, the end of autotransformer TR11 is connected to input end R1, the other end is connected to neutral line input end N1.Autotransformer TR11 is identical with the autotransformer TR11 of the 4th embodiment, has a tap between two-terminal at least.So the voltage between autotransformer TR11 two-terminal equates with AC supply voltage (for example phase voltage of 200V) between input end R1 and the neutral line input end N1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of three-wire system like this.

Be connected to lead-in wire a1, b1 and c1 in an end, the other end and the tap of autotransformer TR11, the three-wire system AC power of conversion is input to control part 41 as mentioned above.Here, control part 41 is identical with the control part of the 4th embodiment, can directly use any one of control part 10, control part 20, control part 30.So, as the explanation of the control part 41 of this embodiment, the explanation that can quote the control part of these embodiments.

Between input end R1 and output terminal R2, insert transformer TR21 with elementary winding P21 and secondary winding S21.Specifically be exactly, the end of secondary winding S21 is connected to input end R1, and the other end is connected to output terminal R2.Carry out an end and the other end of magnetic-coupled elementary winding P21 with this secondary winding S21, be connected to control part 41 by lead-in wire d1 and lead-in wire e1.Here, being connected of switch in the end of the elementary winding P21 of transformer TR21 and the other end (lead-in wire d1 and e1) and the control part etc. owing to identical with the 4th embodiment, identical with being connected of the end of the elementary winding P of the transformer TR1 of each the 1st to the 3rd embodiment and the other end (lead-in wire d and e) and switch etc., and the switching motion of control part is also identical, so the explanation is here omitted.

As mentioned above, comprise the alternating voltage control module 4a of autotransformer TR11, control part 41 and transformer TR21, can realize the control (rising/decline of AC power) of the phase voltage between the input end R1-N1 by formation.

In Fig. 7, autotransformer TR12 also is connected in parallel between input end S1 and neutral line input end N1.Specifically be exactly, the end of autotransformer TR12 is connected to input end S1, and the other end is connected to neutral line input end N1.Autotransformer TR12 is identical with above-mentioned TR11, voltage between the two ends of autotransformer TR12 equates with AC supply voltage (for example phase voltage of 200V) between input end S1 and the neutral line input end N1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of three-wire system like this.

Be connected to lead-in wire a2, b2 and c2 in an end, the other end and the tap of autotransformer TR12, the three-wire system AC power of conversion is input to control part 42 as mentioned above.Control part 42 uses the circuit identical with above-mentioned control part 41.

Between input end S1 and output terminal S2, insert transformer TR22 with elementary winding P22 and secondary winding S22.Specifically be exactly, the end of secondary winding S22 is connected to input end S1, and the other end is connected to output terminal S2.Carry out an end and the other end of magnetic-coupled elementary winding P22 with this secondary winding S22, be connected to control part 42 by lead-in wire d2 and lead-in wire e2.Here, the interior switch of the end of the elementary winding P22 of transformer TR22 and the other end (lead-in wire d2 and e2) and control part etc. be connected and the switching motion of control part identical with control part 41.

As mentioned above, comprise the alternating voltage control module 4b of autotransformer TR12, control part 42 and transformer TR22, can realize the control (rising/decline of AC power) of the phase voltage between the input end S1-N1 by formation.

In Fig. 7, autotransformer TR13 also is connected in parallel between input end T1 and neutral line input end N1.Specifically be exactly, the end of autotransformer TR13 is connected to input end T1, and the other end is connected to neutral line input end N1.Autotransformer TR13 is identical with above-mentioned TR11, TR12, voltage between the two ends of autotransformer TR13 equates with AC supply voltage (for example phase voltage of 200V) between input end T1 and the neutral line input end N1, voltage between the tap and the other end is the voltage that correspondingly distributes according to tap position when mid-point tap (for example be 100V), is transformed to the AC power of three-wire system like this.

Be connected to lead-in wire a3, b3 and c3 in an end, the other end and the tap of autotransformer TR13, the three-wire system AC power of conversion is input to control part 43 as mentioned above.Control part 43 uses the circuit identical with above-mentioned control part 41, control part 42.

Between input end T1 and output terminal T2, insert transformer TR23 with elementary winding P23 and secondary winding S23.Specifically be exactly, the end of secondary winding S23 is connected to input end T1, and the other end is connected to output terminal T2.Carry out an end and the other end of magnetic-coupled elementary winding P23 with this secondary winding S23, be connected to control part 43 by lead-in wire d3 and lead-in wire e3.Here, the interior switch of the end of the elementary winding P23 of transformer TR23 and the other end (lead-in wire d3 and e3) and control part etc. be connected and the switching motion of control part and control part 41, control part 42 identical.

As mentioned above, comprise the alternating voltage control module 4c of autotransformer TR13, control part 43 and transformer TR23, can realize the control (rising/decline of AC power) of the phase voltage between the input end T1-N1 by formation.

Ac voltage control device 5 according to this embodiment, can with the ac voltage control device of the 1st to the 3rd embodiment with every be that unit forms control module mutually, realize the control (step-up/down) of three-phase four-wire system output voltage by easy method, can suppress the increase of volume, scale and the complicacy of ac voltage control device itself, rise that can the suppression equipment price.And, because the enough easy methods of energy, under the situation of step-down, make supply voltage with respect to the bigger situation of the ascensional range of reference voltage under, strengthen its fall, supply voltage with respect to the smaller situation of the ascensional range of reference voltage under, dwindle its fall, realize such two-stage conversion and control, also under the situation of boosting, make supply voltage with respect to the bigger situation of the fall of reference voltage under, strengthen its ascensional range, supply voltage with respect to the smaller situation of the fall of reference voltage under, dwindle its ascensional range, realize such two-stage conversion and control, therefore can realize the ac voltage control device that correspondingly to tackle flexibly according to power condition.

In the above-described embodiment, be to have illustrated that autotransformer has the example that a tap, switch SW 1 and switch SW 3 have the changeover contact u2 that links to each other with this tap, use autotransformer and switch SW 1 and switch SW 3 comprise the structure of a plurality of changeover contacts that are connected these a plurality of taps respectively with two or more taps but also can form.Like this, can correspondingly carry out Control of Voltage (step-up/down) with the voltage amplitude of dividing carefullyyer according to the number of tap.

And, in the above-described embodiment, be to have illustrated by voltage monitoring circuit to come the monitor voltage value and come the example of gauge tap conversion according to the voltage difference of monitor voltage and stipulated standard voltage, but also can be by the information beyond the monitor voltage, for example the circuit with monitor temperature comes monitor temperature, comes the gauge tap conversion according to the difference of monitor temperature and stipulated standard value.The control signal of all right monitoring circuit that need not be such is manually come switch but utilize.

Claims (30)

1. an ac voltage control device is characterized in that,

Be to comprise that a pair of input end of input single-phase-two-wire system AC power and the voltage that output makes this AC power descend or the ac voltage control device of the pair of output of the single-phase-two-wire system AC power of rising, comprise:

The lead-in wire that one end of described input end links to each other with an end of described output terminal;

One end is connected the other end of described input end and the other end is connected a described end and the middle autotransformer that has a tap at least of described input end;

Have elementary winding and and this elementary winding carry out magnetic coupling and be connected the described other end of described input end and the other end of described output terminal between the transformer of secondary winding;

And the interconnected relationship of an end of described elementary winding and a described end of the other end and described autotransformer, described tap and the described other end selected the switch changed.

2. an ac voltage control device is characterized in that,

Be to comprise a pair of input end of input single-phase-two-wire system AC power and the ac voltage control device of the pair of output of the single-phase-two-wire system AC power of exporting the voltage decline that makes this AC power, comprise:

The lead-in wire that one end of described input end links to each other with an end of described output terminal;

One end is connected the other end of described input end and the other end is connected a described end and the middle autotransformer that has a tap at least of described input end;

Have an end be connected described autotransformer a described end elementary winding and and this elementary winding carry out magnetic coupling and be connected the described other end of described input end and the other end of described output terminal between the transformer of secondary winding;

And the switch that the connecting object of the other end of described elementary winding is transformed into any end of a described end of described autotransformer, described tap or the described other end.

3. ac voltage control device as claimed in claim 2 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap and between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

This voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

4. as claim 2 or 3 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

5. an ac voltage control device is characterized in that,

Be to comprise that a pair of input end of input single-phase-two-wire system AC power and the voltage that output makes this AC power descend or the ac voltage control device of the pair of output of the single-phase-two-wire system AC power of rising, comprise:

The lead-in wire that one end of described input end links to each other with an end of described output terminal;

One end is connected the other end of described input end and the other end is connected a described end and the middle autotransformer that has a tap at least of described input end;

Have elementary winding and and this elementary winding carry out magnetic coupling and be connected the described other end of described input end and the other end of described output terminal between the transformer of secondary winding;

Change the 1st switch of the connecting object of the end of described elementary winding and the other end;

And the 2nd switch of changing the connecting object of described the 1st switch,

Described the 1st switch makes an end of described elementary winding or the described end that the other end is connected to described autotransformer, makes the other end or an end of the described elementary winding of a described end that is not connected described autotransformer be connected to described the 2nd switch simultaneously,

Described the 2nd switch makes an end of the described elementary winding that is connected to described the 1st switch or any end that the other end is connected to a described end of described autotransformer, described tap or the described other end.

6. ac voltage control device as claimed in claim 5 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described the 1st switch and the conversion of described the 2nd switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

7. as claim 5 or 6 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

8. an ac voltage control device is characterized in that,

Be to comprise that a pair of input end of input single-phase-two-wire system AC power and the voltage that output makes this AC power descend or the ac voltage control device of the pair of output of the single-phase-two-wire system AC power of rising, comprise:

The lead-in wire that one end of described input end links to each other with an end of described output terminal;

One end is connected the other end of described input end and the other end is connected a described end and the middle autotransformer that has a tap at least of described input end;

Have elementary winding and and this elementary winding carry out magnetic coupling and be connected the described other end of described input end and the other end of described output terminal between the transformer of secondary winding;

And the switch of changing the connecting object of the end of described elementary winding and the other end,

Described switch makes an end of described elementary winding be connected to any end of a described end of described autotransformer, described tap or the described other end, makes the other end of described elementary winding be connected to any end of a described end of described autotransformer, described tap or the described other end simultaneously.

9. ac voltage control device as claimed in claim 8 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

10. ac voltage control device as claimed in claim 8 or 9 is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

11. an ac voltage control device is characterized in that,

Be to comprise three input ends of input three-phase three-wire system AC power and export the voltage decline that makes this AC power or the ac voltage control device of three output terminals of the three-phase three-wire system AC power that rises,

Every alternating voltage control module that comprises mutually of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected and out of phase another described input end of this input end and the middle autotransformer that has a tap at least;

Have elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

And the interconnected relationship of an end of described elementary winding and a described end of the other end and described autotransformer, described tap and the described other end selected the switch changed.

12. an ac voltage control device is characterized in that,

Be to comprise that three input ends of input three-phase three-wire system AC power and output make the ac voltage control device of three output terminals of the three-phase three-wire system AC power that the voltage of this AC power descends,

Every alternating voltage control module that comprises mutually of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected and out of phase another described input end of this input end and the middle autotransformer that has a tap at least;

Have an end be connected described autotransformer a described end elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

And the switch that the connecting object of the other end of described elementary winding is transformed into any end of a described end of described autotransformer, described tap or the described other end.

13. ac voltage control device as claimed in claim 12 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

14. as claim 12 or 13 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

15. an ac voltage control device is characterized in that,

Be to comprise three input ends of input three-phase three-wire system AC power and export the voltage decline that makes this AC power or the ac voltage control device of three output terminals of the three-phase three-wire system AC power that rises,

Every alternating voltage control module that comprises mutually of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected and out of phase another described input end of this input end and the middle autotransformer that has a tap at least;

Have elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

Change the 1st switch of the connecting object of the end of described elementary winding and the other end;

And the 2nd switch of changing the connecting object of described the 1st switch,

Described the 1st switch makes an end of described elementary winding or the described end that the other end is connected to described autotransformer, makes the other end or an end of the described elementary winding of a described end that is not connected described autotransformer be connected to described the 2nd switch simultaneously,

Described the 2nd switch makes an end of the described elementary winding that is connected to described the 1st switch or any end that the other end is connected to a described end of described autotransformer, described tap or the described other end.

16. ac voltage control device as claimed in claim 15 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

17. as claim 15 or 16 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

18. an ac voltage control device is characterized in that,

Be to comprise three input ends of input three-phase three-wire system AC power and export the voltage decline that makes this AC power or the ac voltage control device of three output terminals of the three-phase three-wire system AC power that rises,

Every alternating voltage control module that comprises mutually of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected and out of phase another described input end of this input end and the middle autotransformer that has a tap at least;

Have elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

And the switch of changing the connecting object of the end of described elementary winding and the other end,

Described switch makes an end of described elementary winding be connected to any end of a described end of described autotransformer, described tap or the described other end, makes the other end of described elementary winding be connected to any end of a described end of described autotransformer, described tap or the described other end simultaneously.

19. ac voltage control device as claimed in claim 18 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap with, monitor the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

20. as claim 18 or 19 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

21. an ac voltage control device is characterized in that,

Be to comprise that three input ends of input three-phase four-wire system AC power and neutral line input ends and output make three output terminals of three-phase four-wire system AC power that the voltage of this AC power descends or rise and the ac voltage control device of neutral line output terminal, comprising:

The concentric line that described neutral line input end links to each other with described neutral line output terminal;

And the alternating voltage control module of every phase of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected described concentric line and the middle autotransformer that has a tap at least;

Have elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

And the interconnected relationship of an end of described elementary winding and a described end of the other end and described autotransformer, described tap and the described other end selected the switch changed.

22. an ac voltage control device is characterized in that,

Be to comprise that three input ends of input three-phase four-wire system AC power and neutral line input ends and output make three output terminals of three-phase four-wire system AC power that the voltage of this AC power descends and the ac voltage control device of neutral line output terminal, comprising:

The concentric line that described neutral line input end links to each other with described neutral line output terminal;

And the alternating voltage control module of every phase of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected described concentric line and the middle autotransformer that has a tap at least;

Have an end be connected described autotransformer a described end elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

And the switch that the connecting object of the other end of described elementary winding is transformed into any end of a described end of described autotransformer, described tap or the described other end.

23. ac voltage control device as claimed in claim 22 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

24. as claim 22 or 23 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

25. an ac voltage control device is characterized in that,

Be to comprise that three input ends of input three-phase four-wire system AC power and neutral line input ends and output make three output terminals of three-phase four-wire system AC power that the voltage of this AC power descends or rise and the ac voltage control device of neutral line output terminal, comprising:

The concentric line that described neutral line input end links to each other with described neutral line output terminal;

And the alternating voltage control module of every phase of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected described concentric line and the middle autotransformer that has a tap at least;

Have elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

Change the 1st switch of the connecting object of the end of described elementary winding and the other end;

And the 2nd switch of changing the connecting object of described the 1st switch,

Described the 1st switch makes an end of described elementary winding or the described end that the other end is connected to described autotransformer, makes the other end or an end of the described elementary winding of a described end that is not connected described autotransformer be connected to described the 2nd switch simultaneously,

Described the 2nd switch makes an end of the described elementary winding that is connected to described the 1st switch or any end that the other end is connected to a described end of described autotransformer, described tap or the described other end.

26. ac voltage control device as claimed in claim 25 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap monitoring the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

27. as claim 25 or 26 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

28. an ac voltage control device is characterized in that,

Be to comprise that three input ends of input three-phase four three-wire system AC power and neutral line input ends and output make three output terminals of three-phase four-wire system AC power that the voltage of this AC power descends or rise and the ac voltage control device of neutral line output terminal, comprising:

The concentric line that described neutral line input end links to each other with described neutral line output terminal;

And the alternating voltage control module of every phase of described three-phase alternating current,

Each alternating voltage control module comprises:

One end is connected the described input end of a phase and the other end is connected described concentric line and the middle autotransformer that has a tap at least;

Have elementary winding and carry out magnetic coupling with this elementary winding and be connected described one mutually described input end and and the described output terminal of this input end homophase between the transformer of secondary winding;

And the switch of changing the connecting object of the end of described elementary winding and the other end,

Described switch makes an end of described elementary winding be connected to any end of a described end of described autotransformer, described tap or the described other end, makes the other end of described elementary winding be connected to any end of a described end of described autotransformer, described tap or the described other end simultaneously.

29. ac voltage control device as claimed in claim 28 is characterized in that,

Also comprise between the described end and the described other end that is connected described autotransformer, between a described end and the described tap or between any two ends between the described other end and the described tap with, monitor the voltage monitoring circuit of voltage between two ends,

Described voltage monitoring circuit is controlled the conversion of described switch according to the voltage difference of the reference voltage of monitor voltage that self monitors and regulation.

30. as claim 28 or 29 described ac voltage control devices, it is characterized in that,

Recently change the span of control limit of control of the output voltage of described AC power by the number of turn of described secondary winding and described elementary winding.

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