TW201312919A - Transformer current averaging system, device and circuit - Google Patents

Abstract

A transformer current averaging system comprises: a transformer current averaging device including: a current conversion circuit for receiving an input power signal and a control signal group to accordingly obtain a triangular wave signal; a transformer current averaging circuit for receiving the triangular wave signal to thereby generate M average currents of m levels in which each of the average currents of m levels is equivalent to (1/M) times of the triangular wave signal, the transformer current averaging circuit includes a first current averaging unit to a mth current averaging unit while m≧2 and 2m-1<M≰2 m, and thefirst current averaging unit to the (m-1)th current averaging unit respectively have 1~2m-2 transformer(s) while the mth current averaging unit has (M-2m-1) transformer(s); an output circuit for obtaining an output power signal; and a voltage controller for detecting the voltage of the output power signal and accordingly performing calculation to get the control signal group.

Description

Transformer current sharing system, device and circuit

The present invention relates to a system, device and circuit, and more particularly to a transformer current sharing system, device and circuit.

As shown in FIG. 1, a conventional two-phase buck converter is adapted to be electrically connected to an external power source VS that provides an input power signal to receive the input power signal and convert the input power signal into an output power. The signal includes four switches S1~S4, two inductors L1~L2, and a capacitor CO.

However, the disadvantage of the conventional two-phase buck converter is that in addition to the need to add a voltage controller (not shown), a current sharing current controller (not shown) is needed to detect the output power signal and perform complex The operation is performed to obtain an appropriate control signal to control the switching of the switches S1 to S4 to adjust the voltage and perform the two-phase average shunt.

Accordingly, a first object of the present invention is to provide a transformer current sharing system that solves the above problems.

The transformer current sharing system comprises: a transformer current sharing device and a voltage controller. The transformer current sharing device comprises: a converter circuit, a transformer current sharing circuit, and an output circuit. The converter circuit is electrically connected to an external power source for providing an input power signal to receive the input power signal, and receives a control signal group, and converts the input power signal according to the control signal group to obtain a triangular wave signal. The transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and accordingly generates M m-th order equalizing currents, and each m-th order equalizing current magnitude is equal to the current magnitude of the triangular wave signal (1/M And the transformer current sharing circuit includes first to mth shunt units connected in series, where m ≧ 2, and 2 ^m-1 < M ≦ 2 ^m , and the first to (m-1) shunts The units have 1~2 ^m-2 transformers respectively, and the ^m- th shunt unit has (M-2 ^m-1 ) transformers. The output circuit is electrically connected to the transformer current sharing circuit to receive the M mth-order divided currents, and is accordingly converted into M phase currents, and the M phase currents are summed to obtain an output power signal. The voltage controller is electrically connected to the converter circuit, and is electrically connected to the output circuit to detect a voltage of the output power signal, and is accordingly operated to obtain the control signal group.

Preferably, the control signal group includes two complementary first and second control signals, and the commutation circuit includes: a first switch and a second switch. The first switch has a first end for receiving the input power signal, a second end for providing the triangular wave signal, and a control end for receiving the first control signal, and is first made according to the first control signal And switching the second end between conduction and non-conduction. The second switch has a first end electrically connected to the second end of the first switch, a grounded second end, and a control end receiving the second control signal, and according to the second control signal The first and second ends switch between conducting and non-conducting.

Preferably, the first and second switches are all an N-type MOS field effect transistor, and the first end is a drain, the second end is a source, and the control end is a gate.

Preferably, if M=2 ^m , m≧1, the transformer current sharing circuit divides the current magnitude of the triangular wave signal by m times according to a ratio of 1/2 times, and the first shunting unit is electrically connected to the The commutation circuit receives the triangular wave signal and divides the triangular wave signal into two first-order evenly divided currents. The kth shunting unit is electrically connected to the (k-1)th shunting unit to receive (2 ^k-1 ) (k-1) order equalizing currents, and the 2 ^k-1 (k-1)th order The average current is divided evenly to obtain 2 ^k k-order averaged currents, 2 ≦ k ≦ m. And the first to mth shunting units respectively have 1~2 ^m-1 transformers, one transformer of the first shunting unit is the first transformer, and the 2 ^k-1 transformers of the kth shunting unit are the first and the first respectively Two to 2 ^k-1 transformers, 2≦k≦m.

Preferably, each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the turns ratio of the primary side winding and the secondary side winding It is 1:1.

Preferably, the first and second ends of the primary winding are respectively a polarity point end and a non-polar point end. The first and second ends of the secondary winding are respectively a non-polar point end and a polarity point end.

Preferably, the first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are electrically connected to the second end of the first switch to receive the a triangular wave signal, and the first transformer of the first shunt unit divides the current of the triangular wave signal into the two first-order average divided currents according to the turns ratio thereof, and the first transformer from the first shunt unit The second end of the secondary winding is output. The first ends of the two windings of the first to the second ^k-1 transformers of the kth shunt unit are electrically connected together, and the first ends electrically connected together are sequentially electrically connected to the first (k-1) a second end of the two windings of the first transformer of the first transformer of the shunt unit to a second end of the second winding of the second ^k-1 transformer to receive the 2 ^k-1 (k-1) order equalizing current, respectively And the first to the second ^k-1 transformers of the kth shunt unit respectively divide the 2 ^k-1 (k-1) order average currents according to the turns ratio thereof to obtain 2 ^k k-order average currents. And sequentially outputting from the second end of the two windings of the first transformer of the kth shunt unit to the second end of the second winding of the second ^k-1 transformer, 2≦k≦m.

Preferably, the output circuit comprises: an output capacitor and first to second ^m inductors. Each of the inductors has a first end and a second end, and the first ends of the first to second ^m inductors are sequentially electrically connected to the second ends of the two windings of the first transformer of the mth shunt unit. a second end of the second winding of the second ^m-1 transformer of the mth shunt unit to receive the 2 ^m m-th order equalizing current, and the 2 ^m m-th order dividing current is taken as the first to the first A 2 ^m phase current is output from the second end of the first to second ^m inductors. And the second ends of the first to the second ^m inductors are electrically connected to the output capacitor to add the first to second ^m phase currents to obtain the output power signal.

Preferably, when M=4, the transformer current sharing circuit has: a first shunting unit and a second shunting unit. The first shunting unit is electrically connected to the commutation circuit to receive the triangular wave signal, and accordingly divides the current of the triangular wave signal into two first-order evenly divided currents, and the first shunting unit has a first transformer. The second shunting unit is electrically connected to the first shunting unit to receive the two first-order averaged currents, and divides the two first-order averaged currents evenly to obtain four second-order evenly divided currents, and the second shunting The unit is a first transformer and a second transformer.

Preferably, each transformer has a primary winding and a secondary winding, and the two windings have a first end and a second end, and the two windings of the first transformer of the first shunt unit The first ends are electrically connected together, and the first ends electrically connected together are more electrically connected to the second end of the first switch to receive the triangular wave signal, and the first transformer of the first shunting unit is based on the turns ratio thereof And dividing the current of the triangular wave signal into the two first-order average divided currents, and respectively outputting from the second ends of the primary and secondary side windings of the first transformer of the first shunting unit. The first ends of the two windings of the first and second transformers of the second shunting unit are electrically connected together, and the first ends electrically connected together are more electrically connected to the first transformer of the first shunting unit, a second end of the secondary winding to receive the two first-order averaged currents, and divide the two first-order averaged currents equally to obtain four second-order averaged currents, and respectively from the second shunting unit The second end of the two windings of the first transformer is output, and the second end of the second winding of the second transformer of the second shunt unit is output.

Preferably, the output circuit has: first to fourth inductors, and an output capacitor. Each of the first to fourth inductors has a first end and a second end, and the first ends of the first to fourth inductors are electrically connected to the first transformer of the second shunt unit, respectively. a second end of the secondary winding, a second end of the primary to secondary winding of the second transformer of the second shunt unit, to receive the four second-order split currents output from the second shunt unit, and The four second-order split currents are respectively used as the first to fourth phase currents, respectively outputted from the second ends of the first to fourth inductors, and the second ends of the first to fourth inductors are electrically connected to Together, the first to fourth phase currents are summed. The output capacitor has a first end electrically connected to the second end of the first inductor, and a grounded second end, and receives the summed first to fourth phase currents, and is converted into the output accordingly Power signal.

Preferably, if M is not 2 ^m , m ≧ 1, the transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and the current of the triangular wave signal is shunted into non- 2 ^m phase currents. The current of each phase is the same, and the transformer current sharing circuit has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a minimum leakage inductance principle.

Preferably, when M=3, the transformer current sharing circuit has: a first transformer and a second transformer. The first transformer has a primary side winding and a secondary side winding, and the primary and secondary windings of the first transformer have a turns ratio of 2:1, and the primary and secondary sides of the first transformer The windings each have a first end electrically connected to the first end of the first switch to receive the triangular wave signal, and a second end, and the first transformer distributes the current of the triangular wave signal into a first according to the turns ratio thereof a phase current, and a shunt current, and outputting the first phase current from the second end of the primary winding, and outputting the shunt current from the second end of the secondary winding, wherein the first phase current The ratio of the size to the magnitude of the split current is 1:2. The second transformer has a primary side winding and a secondary side winding, and the primary and secondary windings of the second transformer have a turns ratio of 1:1, and the primary and secondary windings of the second transformer Each has a second end electrically connected to the secondary winding of the first transformer to receive the first end of the split current, and a second end, and the second transformer divides the split current according to the turns ratio thereof Equally distributed into a second phase current, and a third phase current, and the second phase current is output from the second end of the primary winding of the second transformer, and the third phase current is from the second transformer The second end of the secondary winding is output.

Preferably, when M=3, wherein: the first and second ends of each primary winding are respectively a polarity point end and a non-polar point end. The first and second ends of each secondary winding are respectively a non-polar point end and a polarity point end.

Preferably, when M=3, the output circuit has: an output capacitor, and first to third coupled inductors. Each of the first and third coupled inductors has a first end and a second end, and the first end of the first coupled inductor is electrically connected to the second end of the primary winding of the first transformer to receive The first phase current, the first end of the second coupled inductor is electrically connected to the second end of the primary winding of the second transformer to receive the second phase current, and the first end of the third coupled inductor is electrically connected to a second end of the primary winding of the second transformer receives the third phase current, and the second ends of the first to third coupled inductors are electrically connected to the output capacitor to the first to third phase currents The sum becomes the output power signal.

A second object of the present invention is to provide a transformer current equalizing device that solves the above problems.

The transformer current sharing device is adapted to be electrically connected to a voltage controller, wherein the voltage controller is configured to detect an output voltage from the transformer current sharing device and calculate to generate a control signal group, and the transformer current sharing device The utility model comprises: a converter circuit, a transformer current sharing circuit, and an output circuit. The converter circuit is electrically connected to an external power source that provides an input power signal to receive the input power signal, and is electrically connected to the voltage controller to receive the control signal group, and performs the input power signal according to the control signal group. Convert to get a triangular wave signal. The transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and accordingly generates M m-th order equalizing currents, and each m-th order equalizing current magnitude is equal to the current magnitude of the triangular wave signal (1/M And the transformer current sharing circuit includes first to mth shunt units connected in series, where m ≧ 2, and 2 ^m-1 < M ≦ 2 ^m , and the first to (m-1) shunts The units have 1~2 ^m-2 transformers respectively, and the ^m- th shunt unit has (M-2 ^m-1 ) transformers. The output circuit is electrically connected to the transformer current sharing circuit to receive the M mth-order divided currents, and is accordingly converted into M phase currents, and the M phase currents are summed to obtain an output power signal.

Preferably, the control signal group includes two complementary first and second control signals, and the commutation circuit includes: a first switch and a second switch. The first switch has a first end for receiving the input power signal, a second end for providing the triangular wave signal, and a control end for receiving the first control signal, and is first made according to the first control signal And switching the second end between conduction and non-conduction. The second switch has a first end electrically connected to the second end of the first switch, a grounded second end, and a control end receiving the second control signal, and according to the second control signal The first and second ends switch between conducting and non-conducting.

Preferably, the first and second switches are all an N-type MOS field effect transistor, and the first end is a drain, the second end is a source, and the control end is a gate.

Preferably, if M=2 ^m , m≧1, the transformer current sharing circuit divides the current magnitude of the triangular wave signal by m times according to a ratio of 1/2 times, and the first shunting unit is electrically connected to the The commutation circuit receives the triangular wave signal and divides the triangular wave signal into two first-order evenly divided currents. The kth shunting unit is electrically connected to the (k-1)th shunting unit to receive (2 ^k-1 ) (k-1) order equalizing currents, and the 2 ^k-1 (k-1)th order The average current is divided evenly to obtain 2 ^k k-order averaged currents, 2 ≦ k ≦ m. And the first to mth shunting units respectively have 1~2 ^m-1 transformers, one transformer of the first shunting unit is the first transformer, and the 2 ^k-1 transformers of the kth shunting unit are the first and the first respectively Two to 2 ^k-1 transformers, 2≦k≦m.

Preferably, each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the turns ratio of the primary side winding and the secondary side winding It is 1:1.

Preferably, the first and second ends of the primary winding are respectively a polarity point end and a non-polar point end. The first and second ends of the secondary winding are respectively a non-polar point end and a polarity point end.

Preferably, the first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are electrically connected to the second end of the first switch to receive the a triangular wave signal, and the first transformer of the first shunt unit divides the current of the triangular wave signal into the two first-order average divided currents according to the turns ratio thereof, and the first transformer from the first shunt unit The second end of the secondary winding is output. The first ends of the two windings of the first to the second ^k-1 transformers of the kth shunt unit are electrically connected together, and the first ends electrically connected together are sequentially electrically connected to the first (k-1) a second end of the two windings of the first transformer of the first transformer of the shunt unit to a second end of the second winding of the second ^k-1 transformer to receive the 2 ^k-1 (k-1) order equalizing current, respectively And the first to the second ^k-1 transformers of the kth shunt unit respectively divide the 2 ^k-1 (k-1) order average currents according to the turns ratio thereof to obtain 2 ^k k-order average currents. And sequentially outputting from the second end of the two windings of the first transformer of the kth shunt unit to the second end of the second winding of the second ^k-1 transformer, 2≦k≦m.

Preferably, the output circuit comprises: an output capacitor, and first to second ^m inductors. Each of the first to second ^m inductors has a first end and a second end, and the first ends of the first to second ^m inductors are sequentially electrically connected to the first transformer of the mth shunt unit The second end of the two windings to the second end of the second winding of the second ^m-1 transformer of the mth shunt unit to receive the 2 ^m m-th order equal current, and the 2 ^m m order The equalizing currents are output as the first to second ^m- phase currents from the second ends of the first to second ^m inductors, respectively. And the second ends of the first to the second ^m inductors are electrically connected to the output capacitor to add the first to second ^m phase currents to obtain the output power signal.

Preferably, when M=4, the transformer current sharing circuit has: a first shunting unit and a second shunting unit. The first shunting unit is electrically connected to the commutation circuit to receive the triangular wave signal, and accordingly divides the current of the triangular wave signal into two first-order evenly divided currents, and the first shunting unit has a first transformer. The second shunting unit is electrically connected to the first shunting unit to receive the two first-order averaged currents, and divides the two first-order averaged currents evenly to obtain four second-order evenly divided currents, and the second shunting The unit is a first transformer and a second transformer.

Preferably, each transformer has a primary winding and a secondary winding, and the two windings have a first end and a second end, and the two windings of the first transformer of the first shunt unit The first ends are electrically connected together, and the first ends electrically connected together are more electrically connected to the second end of the first switch to receive the triangular wave signal, and the first transformer of the first shunting unit is based on the turns ratio thereof And dividing the current of the triangular wave signal into the two first-order average divided currents, and respectively outputting from the second ends of the primary and secondary side windings of the first transformer of the first shunting unit. The first ends of the two windings of the first and second transformers of the second shunting unit are electrically connected together, and the first ends electrically connected together are more electrically connected to the first transformer of the first shunting unit, a second end of the secondary winding to receive the two first-order averaged currents, and divide the two first-order averaged currents equally to obtain four second-order averaged currents, and respectively from the second shunting unit The second end of the two windings of the first transformer is output, and the second end of the second winding of the second transformer of the second shunt unit is output.

Preferably, the output circuit has: first to fourth inductors and an output capacitor. Each of the first to fourth inductors has a first end and a second end, and the first ends of the first to fourth inductors are electrically connected to the first transformer of the second shunt unit, respectively. a second end of the secondary winding, a second end of the primary to secondary winding of the second transformer of the second shunt unit, to receive the four second-order split currents output from the second shunt unit, and The four second-order split currents are respectively used as the first to fourth phase currents, respectively outputted from the second ends of the first to fourth inductors, and the second ends of the first to fourth inductors are electrically connected to Together, the first to fourth phase currents are summed. The output capacitor has a first end electrically connected to the second end of the first inductor, and a grounded second end, and receives the summed first to fourth phase currents, and is converted into the output accordingly Power signal.

Preferably, if M belongs to non-2 ^m , m≧1: the transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and divides the current of the triangular wave signal into non-2 ^m phase currents. The current of each phase is the same, and the transformer current sharing circuit has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a minimum leakage inductance principle.

Preferably, when M=3, the transformer current sharing circuit has: a first transformer and a second transformer. The first transformer has a primary side winding and a secondary side winding, and the primary and secondary windings of the first transformer have a turns ratio of 2:1, and the primary and secondary windings of the first transformer Each has a first end electrically connected to the first end of the first switch to receive the triangular wave signal, and a second end, and the first transformer distributes the current of the triangular wave signal into a first according to the turns ratio thereof a phase current, and a shunt current, and outputting the first phase current from the second end of the primary side winding, and outputting the shunt current from the second end of the secondary side winding, wherein the first phase current is sized The ratio to the magnitude of the split current is 1:2. The second transformer has a primary side winding and a secondary side winding, and the primary and secondary windings of the second transformer have a turns ratio of 1:1, and the primary and secondary windings of the second transformer are both Having a second end electrically connected to the secondary winding of the first transformer to receive the first end of the split current, and a second end, and the second transformer averages the split current according to the turns ratio thereof Allocating a second phase current, and a third phase current, and outputting the second phase current from the second end of the primary winding of the second transformer, and the third phase current is from the second transformer The second end of the secondary winding is output.

Preferably, when M=3, wherein the first and second ends of each primary winding are respectively a polarity point end and a non-polar point end. The first and second ends of each secondary winding are respectively a non-polar point end and a polarity point end.

Preferably, when M=3, the output circuit has: an output capacitor, and first to third coupled inductors. Each of the first to third coupled inductors has a first end and a second end, and the first end of the first coupled inductor is electrically connected to the second end of the primary winding of the first transformer to receive The first phase current, the first end of the second coupled inductor is electrically connected to the second end of the primary winding of the second transformer to receive the second phase current, and the first end of the third coupled inductor is electrically connected to a second end of the primary winding of the second transformer receives the third phase current, and the second ends of the first to third coupled inductors are electrically connected to the output capacitor to the first to third phase currents The sum becomes the output power signal.

A third object of the present invention is to provide a transformer current sharing circuit that solves the above problems.

The transformer current sharing circuit is applied to a transformer current sharing device, wherein the transformer current sharing device is adapted to be electrically connected to a voltage controller, and the transformer current sharing device comprises a converter circuit, wherein the voltage controller is configured to detect An output voltage of the transformer current sharing device is operative to generate a control signal group, the converter circuit receives an input power signal, and is electrically connected to the voltage controller to receive the control signal group, and according to the control signal group Converting the input power signal to obtain a triangular wave signal, and the transformer current sharing circuit includes first to mth shunting units connected in series, the first to mth shunting units being electrically connected to the commutating circuit to receive the triangular wave a signal, and according to which M m-th order equalizing currents are generated, each m-th order equalizing current is equal to (1/M) times the current of the triangular wave signal, wherein m≧2, and 2 ^m-1 <M ≦ 2 ^m , and the first to (m-1) shunt units respectively have 1 to 2 ^m-2 transformers, and the mth shunt unit has (M-2 ^m-1 ) transformers.

Preferably, if M=2 ^m , m≧1, the transformer current sharing circuit divides the current magnitude of the triangular wave signal by m times according to a ratio of 1/2 times, and the first shunting unit is electrically connected to the The commutation circuit receives the triangular wave signal and divides the triangular wave signal into two first-order evenly divided currents. The kth shunting unit is electrically connected to the (k-1)th shunting unit to receive (2 ^k-1 ) (k-1) order equalizing currents, and the 2 ^k-1 (k-1)th order The average current is divided evenly to obtain 2 ^k k-order averaged currents, 2 ≦ k ≦ m. And the first to mth shunting units respectively have 1~2 ^m-1 transformers, one transformer of the first shunting unit is the first transformer, and the 2 ^k-1 transformers of the kth shunting unit are the first and the first respectively Two to 2 ^k-1 transformers, 2≦k≦m.

Preferably, each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the primary side winding and the secondary side winding are respectively The ratio is 1:1.

Preferably, the first and second ends of the primary winding are respectively a polarity point end and a non-polar point end. The first and second ends of the secondary winding are respectively a non-polar point end and a polarity point end.

Preferably, the first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are electrically connected to the second end of the first switch to receive the a triangular wave signal, and the first transformer of the first shunt unit divides the current of the triangular wave signal into the two first-order average divided currents according to the turns ratio thereof, and the first transformer from the first shunt unit The second end of the secondary winding is output. The first ends of the two windings of the first to the second ^k-1 transformers of the kth shunt unit are electrically connected together, and the first ends electrically connected together are sequentially electrically connected to the first (k-1) a second end of the two windings of the first transformer of the first transformer of the shunt unit to a second end of the second winding of the second ^k-1 transformer to receive the 2 ^k-1 (k-1) order equalizing current, respectively And the first to the second ^k-1 transformers of the kth shunt unit respectively divide the 2 ^k-1 (k-1) order average currents according to the turns ratio thereof to obtain 2 ^k k-order average currents. And sequentially outputting from the second end of the two windings of the first transformer of the kth shunt unit to the second end of the second winding of the second ^k-1 transformer, 2≦k≦m.

Preferably, when M=4, the transformer current sharing circuit has: a first shunting unit and a second shunting unit. The first shunting unit is electrically connected to the commutation circuit to receive the triangular wave signal, and accordingly divides the current of the triangular wave signal into two first-order evenly divided currents, and the first shunting unit has a first transformer. The second shunting unit is electrically connected to the first shunting unit to receive the two first-order averaged currents, and divides the two first-order averaged currents evenly to obtain four second-order evenly divided currents, and the second shunting The unit is a first transformer and a second transformer.

Preferably, each transformer has a primary winding and a secondary winding, and the two windings have a first end and a second end, and the two windings of the first transformer of the first shunt unit The first ends are electrically connected together, and the first ends electrically connected together are more electrically connected to the second end of the first switch to receive the triangular wave signal, and the first transformer of the first shunting unit is based on the turns ratio thereof And dividing the current of the triangular wave signal into the two first-order average divided currents, and respectively outputting from the second ends of the primary and secondary side windings of the first transformer of the first shunting unit. The first ends of the two windings of the first and second transformers of the second shunting unit are electrically connected together, and the first ends electrically connected together are more electrically connected to the first transformer of the first shunting unit, a second end of the secondary winding to receive the two first-order averaged currents, and divide the two first-order averaged currents equally to obtain four second-order averaged currents, and respectively from the second shunting unit The second end of the two windings of the first transformer is output, and the second end of the second winding of the second transformer of the second shunt unit is output.

Preferably, if M is not 2 ^m , m ≧ 1, the transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and the current of the triangular wave signal is shunted into non- 2 ^m phase currents. The current of each phase is the same, and the transformer current sharing circuit has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a minimum leakage inductance principle.

Preferably, when M=3, the transformer current sharing circuit has: a first transformer and a second transformer. The first transformer has a primary side winding and a secondary side winding, and the primary and secondary windings of the first transformer have a turns ratio of 2:1, and the primary and secondary windings of the first transformer Each has a first end electrically connected to the first end of the first switch to receive the triangular wave signal, and a second end, and the first transformer distributes the current of the triangular wave signal into a first according to the turns ratio thereof a phase current, and a shunt current, and outputting the first phase current from the second end of the primary side winding, and outputting the shunt current from the second end of the secondary side winding, wherein the first phase current is sized The ratio to the magnitude of the split current is 1:2. The second transformer has a primary side winding and a secondary side winding, and the primary and secondary windings of the second transformer have a turns ratio of 1:1, and the primary and secondary windings of the second transformer are both Having a second end electrically connected to the secondary winding of the first transformer to receive the first end of the split current, and a second end, and the second transformer averages the split current according to the turns ratio thereof Allocating a second phase current, and a third phase current, and outputting the second phase current from the second end of the primary winding of the second transformer, and the third phase current is from the second transformer The second end of the secondary winding is output.

Preferably, when M=3, the first and second ends of each primary winding are respectively a polarity point end and a non-polar point end. The first and second ends of each secondary winding are respectively a non-polar point end and a polarity point end.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

As shown in FIG. 2, a preferred embodiment of the transformer current sharing system 2 of the present invention is adapted to be electrically connected to an external power source VS that provides an input power signal to receive the input power signal, and includes: a transformer current sharing device 3 And a voltage controller 4.

The transformer current sharing device 3 includes a converter circuit 5, a transformer current sharing circuit 6, and an output circuit 7.

<Commutation circuit>

The converter circuit 5 is electrically connected to the external power source VS to receive the input power signal, and receives a control signal group VG, and converts the input power signal according to the control signal group VG to obtain a triangular wave signal. In this embodiment, the control signal group VG includes two complementary first and second control signals VS1, VS2, and the commutation circuit 5 is a half bridge converter, and the half bridge converter includes a first The switch S1 and a second switch S2.

The first switch S1 has a first end for receiving the input power signal, a second end for providing the triangular wave signal, and a control end for receiving the first control signal VS1, and is configured according to the first control signal VS1. The first and second ends are switched between conducting and non-conducting.

The second switch S2 has a first end electrically connected to the second end of the first switch S1, a grounded second end, and a control end receiving the second control signal VS2, and according to the second control signal VS2 switches its first and second ends between conduction and non-conduction.

In this embodiment, the first and second switches S1 and S2 are all an N-type gold-oxygen half field effect transistor, and the first end thereof is a drain, the second end is a source, and the control end is a gate.

<Transformer current sharing circuit>

The transformer current sharing circuit 6 is electrically connected to the commutation circuit 5 to receive the triangular wave signal, and accordingly generates M m-th order equalizing currents, and each m-th order equalizing current magnitude is equal to the magnitude of the triangular wave signal current (1) /M) times, and the transformer current sharing circuit 6 includes first to mth shunting units CD1 to CDm connected in series, where m ≧ 2 and 2 ^m-1 < M ≦ 2 ^m .

The first to (m-1)th shunt units CD1 to CD(m-1) respectively have 1 to 2 ^m-2 transformers, and the mth shunt unit CDm has (M-2 ^m-1 ) transformers. Therefore, when M = 2 ^m , the mth shunt unit CDm has 2 ^m-1 transformers.

<output circuit>

The output circuit 7 is electrically connected to the transformer current sharing circuit 6 to receive the M m-th order divided currents, and is accordingly converted into M phase currents i1~i(M), and the M phase currents i1~i ( M) summing up to obtain an output power signal, the output circuit 7 including first, second to Mth inductors L1, L2~L(M), and an output capacitor CO.

First implementation

As shown in FIG. 3, the first embodiment of the present embodiment is M=2 ^m , m≧1. Therefore, in the first embodiment, the transformer current sharing circuit 6 divides the current magnitude of the triangular wave signal by m times in accordance with the ratio of 1/2 times.

The first shunting unit CD1 is electrically connected to the commutation circuit 5 to receive the triangular wave signal, and accordingly divides the triangular wave signal into two first-order evenly divided currents.

The kth shunting unit is electrically connected to the (k-1)th shunting unit to receive (2 ^k-1 ) (k-1) order equalizing currents, and the 2 ^k-1 (k-1) steps are averaged The current divided average is divided to obtain 2 ^k k-order averaged currents, 2≦k≦m.

In this case, an example is given to equalize the mean m times. As shown in Fig. 4, assuming that the current of the triangular wave signal = 2 ^m A, two first steps of 2 ^m-1 A are obtained by shunting the first shunt unit CD1. The current is divided equally, and then the second shunt unit CD2 is shunted to obtain four second ^- order averaged currents of size 2 ^m-2 A, and so on. Finally, the m-th order of 1 m is obtained by the ^m- th shunt cell CDm shunt. Equalize the current.

The first to mth shunting units CD1 to CDm respectively have 1 to 2 ^m-1 transformers, one transformer of the first shunting unit CD1 is the first transformer T1, and the 2 ^k-1 transformers of the kth shunting unit are respectively First, second to second ^k-1 transformers, 2≦k≦m, each transformer has a primary side winding m1 and a secondary side winding m2, and the two windings m1, m2 each have a first end and a second end, and the turns ratio of the primary side winding m1 and the secondary side winding m2 is 1:1. In the first embodiment, the first and second ends of the primary winding m1 are a polarity point end and a non-polar point end, respectively. The first and second ends of the secondary winding m2 are a non-polar point end and a polarity point end, respectively.

The first ends of the two windings m1, m2 of the first transformer T1 of the first shunt unit CD1 are electrically connected together, and the first ends electrically connected together are more electrically connected to the second end of the first switch S1. Receiving the triangular wave signal, and the first transformer T1 of the first shunting unit CD1 divides the current of the triangular wave signal into the two first-order equalizing currents according to the turns ratio thereof, and respectively from the first shunting unit CD1 The second ends of the primary and secondary windings m1, m2 of a transformer T1 are output.

The first ends of the two windings m1 and m2 of the first to second ^k-1 transformers of the kth shunt unit are electrically connected together, and the first ends electrically connected together are electrically connected to the first part respectively. K-1) the second end of the two windings m1, m2 of the first transformer T1 of the shunt unit to the second end of the two windings m1, m2 of the second ^k-1 transformer to receive the 2 ^k-1 respectively (k-1) order-averaged current, and the first to second ^k-1 transformers of the ^k- th shunt unit respectively divide the 2 ^k-1 (k-1)-order average current by the turns ratio Obtaining 2 ^k k-order averaged currents, and sequentially from the second end of the two windings m1, m2 of the first transformer T1 of the kth shunt unit to the second winding of the second ^k-1 transformer The second end of m2 is output, 2≦k≦m.

Because M=2 ^m , the output circuit 7 is electrically connected to the transformer current sharing circuit 6 to receive the 2 ^m m-th order equal current, and is accordingly converted into 2 ^m phase currents i1~i(2 ^m ), and Adding 2 ^m phase currents i1~i(2 ^m ) to obtain an output power signal, the output circuit 7 includes first, second to second ^m inductors L1, L2~L(2 ^m ), and one Output capacitor CO.

Each of the inductors L1~L( ^2m ) has a first end and a second end, and the first ends of the first to second ^m inductors L1~L( ^2m ) are sequentially electrically connected to the mth shunt The second end of the two windings m1, m2 of the first transformer T1 of the unit CDm to the second end of the second winding m1, m2 of the second ^m-1 transformer T(2 ^m-1 ) of the mth shunting unit CDm Receiving the 2 ^m m-th order average current, and using the 2 ^m m-th order equalization current as the first to second ^m- phase currents i1~i(2 ^m ) from the first to the second ^m inductance The second end of L1~L(2 ^m ) is output. And the second ends of the first to second ^m inductors L1 L L (2 ^m ) are electrically connected to the output capacitor CO to add the first to second ^m phase currents i1 to i (2 ^m ) to obtain the Output power signal.

The voltage controller 4 is electrically connected to the converter circuit 5, and is electrically connected to the output circuit 7 to detect the voltage of the output power signal, and is accordingly calculated to obtain the control signal group VG, wherein a further implementation is The voltage controller 4 compares the voltage of the output power signal with a preset voltage. When the voltage vo is greater than the preset voltage, the pulse width of the first control signal VS1 is reduced, and when the voltage vo is less than the preset In the case of voltage, the pulse width of the first control signal VS1 is increased such that the voltage vo is substantially equal to the preset voltage.

M=2 ²

In the 4-phase architecture (M=2 ² ), as shown in FIG. 5, the transformer current sharing circuit 6 has a first shunting unit CD1 and a second shunting unit CD2.

The first shunting unit CD1 is electrically connected to the commutation circuit 5 to receive the triangular wave signal, and according to the current, the current of the triangular wave signal is equally divided into two first-order averaged currents, and the first shunting unit CD1 has a first A transformer T1.

The second shunting unit CD2 is electrically connected to the first shunting unit CD1 to receive the two first-order equalizing currents, and equally divides the two first-order equalizing currents to obtain four second-order equalizing currents.

Further, the first shunt unit CD1 has a transformer which is a first transformer T1, and the second shunt unit CD2 has two transformers, a first transformer T1 and a second transformer T2.

The first ends of the two windings m1, m2 of the first transformer T1 of the first shunt unit CD1 are electrically connected together, and the first ends electrically connected together are more electrically connected to the second end of the first switch S1. Receiving the triangular wave signal, and the first transformer T1 of the first shunting unit CD1 divides the current of the triangular wave signal into the two first-order equalizing currents according to the turns ratio thereof, and respectively from the first shunting unit CD1 The second ends of the primary and secondary windings m1, m2 of a transformer T1 are output.

The first ends of the two windings m1, m2 of the first and second transformers T1, T2 of the second shunt unit CD2 are electrically connected together, and the first ends electrically connected together are electrically connected to the first shunt unit The second ends of the primary and secondary windings m1 and m2 of the first transformer T1 of the CD1 respectively receive the two first-order averaged currents, and equally divide the two first-order averaged currents to obtain four second-orders. Dividing currents, respectively, and outputting from the second ends of the two windings m1, m2 of the first transformer T1 of the second shunt unit CD2, and the two windings m1, m2 of the second transformer T2 of the second shunting unit CD2 The second end outputs.

The output circuit 7 has first to fourth inductors L1 to L4 and an output capacitor CO.

The first ends of the first to fourth inductors L1 to L4 are electrically connected to the second ends of the primary-secondary windings m1 and m2 of the first transformer T1 of the second shunting unit CD2, and the second shunting unit CD2 a second end of the primary-secondary windings m1, m2 of the second transformer T2 for receiving the four second-order equalizing currents outputted from the second shunting unit CD2, and respectively dividing the four second-order equalizing currents The first to fourth phase currents i1 to i4 are output from the second ends of the first to fourth inductors L1 to L4, respectively. And the second ends of the first to fourth inductors L1 to L4 are electrically connected together to add the first to fourth phase currents i1 to i4.

The output capacitor CO has a first end electrically connected to the second end of the first inductor L1, and a grounded second end, and receives the summed first to fourth phase currents i1~i4, and according to To convert to the output power signal and store it to cope with sudden changes in the power consumption of the load.

Second preferred embodiment

As shown in FIG. 6, a second embodiment of the preferred embodiment, wherein the transformer current sharing circuit 6 of the second embodiment differs from the transformer current sharing circuit 6 of the first embodiment in that: M belongs to non-2 ^m , m≧1.

The transformer current sharing circuit 6 of the second embodiment is electrically connected to the commutation circuit 5 to receive the triangular wave signal, and divides the current of the triangular wave signal into non-2 ^m phase currents, each of which has the same magnitude . And the transformer current sharing circuit 6 has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a principle of a minimum leakage inductance.

As shown in Fig. 7, in order to convert into a non-2 ^m phase current, assuming that the triangular wave signal is M(≠2 ^m )A, the current of the triangular wave signal is shunted according to the principle of minimum leakage inductance to obtain two sizes respectively. The current of (M-2 ^P ), 2 ^P A , and then the current of 2 ^p A is shunted according to the medium-to-average method of the first preferred embodiment, and the size is (M-2 ^P ) The current is then shunted according to the principle of minimum leakage inductance to obtain two currents of size (M-2 ^P -2 ^Q ) and 2 ^Q A , and so on, and finally a current of 2 ^{m and} 1 A is obtained. As an example, as shown in FIG. 8, if M=9, the transformer turns ratio of the current of the triangular wave signal of the size of 9A is 4:5 to divide the current of the triangular wave signal of size 9A into a size. The currents of 5A and 4A, respectively, then the current of 4A is shunted according to the medium-to-average method of the first preferred embodiment, and the transformer turns ratio of receiving the current of 5A is 2:3. The current is divided into currents of 3A and 2A, and so on, and finally 9 currents of 1A are obtained.

The M=3 phase architecture is an implementation of the embodiment. As shown in FIG. 9, the transformer current sharing circuit 6 has a first transformer T1 and a second transformer T2.

The first transformer T1 has a primary side winding m1 and a secondary side winding m2, and the turns ratio of the primary and secondary side windings m1, m2 of the first transformer T1 is 2:1, the first transformer T1 The primary and secondary windings m1, m2 each have a first end electrically connected to the first end of the first switch S1 to receive the triangular wave signal, and a second end, and the first transformer T1 is based on the number of turns thereof Distributing the current of the triangular wave signal into a first phase current i1, and a shunt current, and outputting the first phase current i1 from the second end of the primary side winding m1, and the shunt current is from the secondary side The second end of the winding m2 is output, wherein the ratio of the magnitude of the first phase current i1 to the magnitude of the split current is 1:2.

The second transformer T2 has a primary side winding m1 and a secondary side winding m2, and the turns ratio of the primary and secondary side windings m1, m2 of the second transformer T2 is 1:1, and the second transformer T2 The primary and secondary windings m1, m2 each have a first end electrically connected to the second end of the secondary winding m2 of the first transformer T1 to receive the split current, and a second end, and the second The transformer T2 equally distributes the split phase current into a second phase current i2 and a third phase current i3 according to the turns ratio thereof, and the second phase current i2 is from the first side winding m1 of the second transformer T2. The two-terminal output outputs the third phase current i3 from the second end of the secondary winding m2 of the second transformer T2.

In this embodiment, the first and second ends of each of the primary side windings m1 are a polarity point end and a non-polar point end, respectively. The first and second ends of each secondary winding m2 are a non-polar point end and a polarity point end, respectively.

The output circuit 7 includes first to third coupled inductors L1 L L3 and an output capacitor CO.

Each of the first inductors L1 and L3 has a first end and a second end. The first end of the first coupled inductor L1 is electrically connected to the second end of the primary winding m1 of the first transformer T1 to receive the first end. The first end of the second coupled inductor L2 is electrically connected to the second end of the primary winding m1 of the second transformer T2 to receive the second phase current i2, the first end of the third coupled inductor L3 The second end of the primary side winding m1 of the second transformer T2 is electrically connected to receive the third phase current i3. The second ends of the first to third coupled inductors L1 L L3 are electrically connected to the output capacitor CO to add the first to third phase currents i1 to i3 to the output power signal.

According to the implementation aspect of M=3, and so on, other than 2 ^m , such as M=5, 7, 9, etc., are applicable.

Further, in the above embodiment, the method of performing current shunting using a transformer can be applied to other power converters.

<Experimental results>

As shown in FIG. 10, the four-phase architecture (M=2 ² ) of the above embodiment operates on the voltage of the input power signal=12V, the voltage of the output power signal, and the current=5V/20A, and the obtained measurement result is obtained from the result. It can be seen that the currents of the respective phases i1 to i4 are both currents.

As shown in FIG. 11, the three-phase architecture (M=3) of the above embodiment operates on the voltage of the input power signal=12V, the voltage of the output power signal, and the current=5V/15A, and the obtained measurement result can be seen from the result. The currents of the currents i1 to i3 are averaged.

In summary, the above embodiment has the advantage that the transformer current sharing circuit 6 is used to shunt the received current. Therefore, the current sharing current controller is not required to only require the voltage controller 4, that is, without complicated operations. Can achieve the purpose of current sharing.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . Transformer current sharing system

3. . . Transformer current sharing device

4. . . Voltage controller

5. . . Converter circuit

S1. . . First switch

S2. . . Second switch

6. . . Transformer current sharing circuit

CD1. . . First shunt unit

CD2. . . Second shunt unit

CD(m-1). . . (m-1) shunt unit

CDm. . . Mth shunt unit

T1. . . First transformer

T2. . . Second transformer

T(2 ^m-1 ). . . 2 ^m-1 transformer

M1. . . Primary winding

M2. . . Secondary winding

7. . . Output circuit

CO. . . Output capacitor

L1. . . First inductance

L2. . . Second inductance

L(M). . . M inductor

L(2 ^m-1 ). . . 2 ^m-1 inductance

L(2 ^m ). . . 2 ^m inductor

L3. . . Third inductance

L4. . . Fourth inductance

VG. . . Control signal group

VS. . . External power supply

Figure 1 is a conventional two-phase buck converter;

Figure 2 is a preferred embodiment of the transformer current sharing system of the present invention;

Figure 3 is a first embodiment of the preferred embodiment;

Figure 4 is an equal division of m times;

Figure 5 is a 4-phase architecture (m = 2) description;

Figure 6 is a second embodiment of the preferred embodiment;

Figure 7 is a generalized practice of converting to a phase current other than 2 ^m ;

Figure 8 is a generalized practice of converting into nine phase currents;

Figure 9 is an M=3 phase architecture;

Figure 10 is a measurement result obtained by the four-phase architecture of the above embodiment; and

Figure 11 is a measurement result obtained by the three-phase structure (M = 3) of the above embodiment.

2. . . Transformer current sharing system

3. . . Transformer current sharing device

4. . . Voltage controller

5. . . Converter circuit

6. . . Transformer current sharing circuit

7. . . Output circuit

S1. . . First switch

S2. . . Second switch

CD1. . . First shunt unit

CD(m-1). . . (m-1) shunt unit

CDm. . . Mth shunt unit

CO. . . Output capacitor

I1~i(M). . . Phase current

L1. . . First inductance

L2. . . Second inductance

L(M). . . M inductor

VG. . . Control signal group

Vo. . . Voltage

VS1. . . First control signal

VS2. . . Second control signal

VS. . . External power supply

Claims (40)

A transformer current sharing system comprising: a transformer current sharing device, comprising: a converter circuit electrically connected to an external power source for providing an input power signal to receive the input power signal, and receiving a control signal group, and according to the The control signal group converts the input power signal to obtain a triangular wave signal; a transformer current sharing circuit is electrically connected to the converter circuit to receive the triangular wave signal, and accordingly generates M m-th order equalizing currents, each m The step average current is equal to (1/M) times the current of the triangular wave signal, and the transformer current sharing circuit includes the first to mth shunt units connected in series, where m≧2, and 2 ^m-1 < M≦2 ^m , and the first to (m-1) shunting units respectively have 1~2 ^m-2 transformers, the mth shunting unit has (M-2 ^m-1 ) transformers; and an output circuit Electrically connected to the transformer current sharing circuit to receive the M m-th order equalization currents, and converted into M phase currents, and summed the M phase currents to obtain an output power signal; and a voltage control Electrically connected to the converter circuit and electrically connected to the Circuit to detect the output voltage of the power signal, and accordingly calculates to obtain the control signal group. The transformer current sharing system of claim 1, wherein the control signal group comprises two complementary first and second control signals, and the converter circuit comprises: a first switch having a receiving a first end of the input power signal, a second end providing the triangular wave signal, and a control end receiving the first control signal, and the first and second ends are turned on and off according to the first control signal Switching between conduction; and a second switch having a first end electrically connected to the second end of the first switch, a grounded second end, and a control end receiving the second control signal, and according to the The second control signal switches the first and second ends between conducting and non-conducting. The transformer current sharing system according to claim 2, wherein the first and second switches are an N-type gold-oxygen half-field effect transistor, and the first end is a drain and the second end is a source. The pole is the gate. According to the transformer current sharing system described in claim 1, if M=2 ^m and m≧1, the transformer current sharing circuit divides the current of the triangular wave signal by 1/2 times and equalizes m times. And: the first shunting unit is electrically connected to the commutating circuit to receive the triangular wave signal, and according to the average splitting the triangular wave signal into two first-order equalizing currents; the kth shunting unit is electrically connected to the first K-1) The shunt unit receives (2 ^k-1 ) (k-1)-order averaged currents, and averages the 2 ^k-1 (k-1)-order averaged currents to obtain 2 ^k k The step average current is divided into 2≦k≦m; and the first to mth shunt units respectively have 1~2 ^m-1 transformers, one transformer of the first shunt unit is the first transformer, and the kth shunt unit 2 ^{The k-1} transformers are the first, second, and second ^k-1 transformers, respectively, 2≦k≦m. The transformer current sharing system of claim 4, wherein: each transformer has a primary side winding and a secondary side winding, and the two windings each have a first end and a second end, and the The turns ratio of the primary side winding and the secondary side winding is 1:1. According to the transformer current sharing system of claim 5, wherein: the first and second ends of the primary winding are respectively a polarity point end and a non-polar point end; the first side of the secondary side winding The second end is a non-polar point end and a polar point end, respectively. The transformer current sharing system of claim 5, wherein: the first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are more electrically Connected to the second end of the first switch to receive the triangular wave signal, and the first transformer of the first shunting unit divides the current of the triangular wave signal into the two first-order averaged currents according to the turns ratio thereof, and respectively Outputting from the second end of the primary and secondary windings of the first transformer of the first shunt unit; the first ends of the two windings of the first to second ^k-1 transformers of the kth shunt unit are electrically connected And the first ends electrically connected together are sequentially electrically connected to the second ends of the two windings of the first transformer of the (k-1) shunt unit to the second winding of the second ^k-1 transformer a second end for receiving respectively the 2 ^k-1 th (k-1) order of average current and shunting means the k first to 2 ^k-1 turns ratio transformer in accordance with its respective the 2 ^{k -1} (k-1) where the mean shunt order to obtain a current average ^k 2 k-order current-sharing, and each sub-sequence from the k The two ends of the second winding of the first transformer unit outputting the two ends of the second winding of the first to 2 ^k-1 transformer, 2 ≦ k ≦ m. According to the transformer current sharing system of claim 7, the output circuit comprises: an output capacitor; and first, second to second ^m inductors, each inductor having a first end and a second end, The first ends of the first to second ^m inductors are respectively electrically connected to the second end of the two windings of the first transformer of the mth shunt unit to the second ^m-1 transformer of the mth shunt unit a second end of the second winding to receive the 2 ^m m-th order divided current, and the 2 ^m m-th order equalizing current is used as the first to second ^m- phase currents respectively from the first to the second ^m- inductance The second end outputs. And the second ends of the first to the second ^m inductors are electrically connected to the output capacitor to add the first to second ^m phase currents to obtain the output power signal. According to the transformer current sharing system of claim 1, when M=4, the transformer current sharing circuit has: a first shunting unit electrically connected to the commutation circuit to receive the triangular wave signal, and according to And dividing the current of the triangular wave signal into two first-order averaged currents, and the first shunting unit has a first transformer; and a second shunting unit electrically connected to the first shunting unit to receive the two The step divides the current, and divides the two first-order averaged currents evenly to obtain four second-order averaged currents, and the second shunting unit is a first transformer and a second transformer. According to the transformer current sharing system of claim 9, wherein: each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the The first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are further electrically connected to the second end of the first switch to receive the triangular wave signal, and the The first transformer of the first shunting unit divides the current of the triangular wave signal into two equal-order average currents according to the turns ratio thereof, and respectively obtains the primary and secondary windings of the first transformer of the first shunting unit a second end output; the first ends of the two windings of the first and second transformers of the second shunt unit are electrically connected together, and the first ends electrically connected together are more electrically connected to the first shunt unit a second end of the primary and secondary windings of the first transformer to respectively receive the two first-order averaged currents, and divide the two first-order averaged currents equally to obtain four second-order averaged currents, and respectively From the second diversion slip The second end of the two windings of the first transformer of the first transformer is outputted by the second end of the second winding of the second transformer of the second shunt unit. According to the transformer current sharing system of claim 10, the output circuit has: first to fourth inductors, each inductor has a first end and a second end, and the first to fourth inductors The first end is electrically connected to the second end of the primary-secondary winding of the first transformer of the second shunting unit, and the second end of the primary-secondary winding of the second transformer of the second shunting unit, respectively Receiving the four second-order equalizing currents outputted by the second shunting unit, and using the four second-order equalizing currents as the first to fourth phase currents, respectively, from the second to fourth inductive And outputting, the second ends of the first to fourth inductors are electrically connected together to add the first to fourth phase currents; and an output capacitor having a second end electrically connected to the first inductor The first end, and a grounded second end, and receiving the summed first to fourth phase currents, and accordingly converted into the output power signal. According to the transformer current sharing system described in claim 1, if M is non-2 ^m , m≧1: the transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and the triangular wave is The current of the signal is shunted into non-2 ^m phase currents, the magnitude of each phase current is the same, and the transformer current sharing circuit has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a minimum leakage inductance principle. According to the transformer current sharing system of claim 1, in the case of M=3, the transformer current sharing circuit has: a first transformer having a primary winding and a secondary winding, and the first The first and second side windings of the transformer have a turns ratio of 2:1, and the primary and secondary windings of the first transformer each have a first end electrically connected to the first switch to receive the triangular wave signal One end, and a second end, and the first transformer distributes the current of the triangular wave signal into a first phase current according to a turns ratio thereof, and a shunt current, and the first phase current is from the primary side winding a second end output, and the shunt current is output from the second end of the secondary winding, wherein a ratio of the first phase current to the split current is 1:2; and a second transformer has a a primary winding, and a secondary winding, and the primary and secondary windings of the second transformer have a turns ratio of 1:1, and the primary and secondary windings of the second transformer have an electrical connection Second of the secondary winding of a transformer Receiving a first end of the split current, and a second end, and the second transformer equally distributes the split current into a second phase current and a third phase current according to a turns ratio thereof, and The second phase current is output from the second end of the primary side winding of the second transformer, and the third phase current is output from the second end of the secondary side winding of the second transformer. According to the transformer current sharing system described in claim 13 of the patent application, when M=3, wherein: the first and second ends of each primary winding are respectively a polarity point end and a non-polar point end; each two The first and second ends of the secondary winding are respectively a non-polar point end and a polarity point end. According to the transformer current sharing system of claim 13 , when M=3, the output circuit has: an output capacitor; first to third coupled inductors, each coupled inductor has a first end and a first The first end of the first coupled inductor is electrically connected to the second end of the primary winding of the first transformer to receive the first phase current, and the first end of the second coupled inductor is electrically connected to the second a second end of the primary winding of the transformer to receive the second phase current, the first end of the third coupled inductor being electrically connected to the second end of the primary winding of the second transformer to receive the third phase current, and The second ends of the first to third coupled inductors are electrically connected to the output capacitor to add the first to third phase currents into the output power signal. A transformer current sharing device is adapted to be electrically connected to a voltage controller, wherein the voltage controller is configured to detect an output voltage from the transformer current sharing device and calculate to generate a control signal group, and the transformer current sharing device The method includes: a converter circuit electrically connected to an external power source that provides an input power signal to receive the input power signal, and is electrically connected to the voltage controller to receive the control signal group, and the input is according to the control signal group The power signal is converted to obtain a triangular wave signal; a transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and accordingly generates M m-th order equalizing currents, and each m-th order equalizing current is equal to The current of the triangular wave signal is (1/M) times, and the transformer current sharing circuit includes first to mth shunting units connected in series, where m≧2, and 2 ^m-1 <M≦2 ^m , and The first to (m-1) shunting units respectively have 1 to 2 ^m-2 transformers, the mth shunting unit has (M-2 ^m-1 ) transformers; and an output circuit electrically connected to the transformer Current sharing circuit to receive the M m-th order current-sharing, and accordingly converted into M phase currents, and the sum of the M phase currents to obtain an output power signal. The transformer current equalization device of claim 16, wherein the control signal group comprises two complementary first and second control signals, and the converter circuit comprises: a first switch having a receiving a first end of the input power signal, a second end providing the triangular wave signal, and a control end receiving the first control signal, and the first and second ends are turned on and off according to the first control signal Switching between conduction; and a second switch having a first end electrically connected to the second end of the first switch, a grounded second end, and a control end receiving the second control signal, and according to the The second control signal switches the first and second ends between conducting and non-conducting. The transformer current equalization device according to claim 17, wherein the first and second switches are an N-type gold-oxygen half field effect transistor, and the first end is a drain and the second end is a source. The pole is the gate. According to the transformer current sharing device described in claim 16 of the patent application, if M=2 ^m and m≧1, the transformer current sharing circuit divides the current of the triangular wave signal by 1/2 times and equalizes m times. And: the first shunting unit is electrically connected to the commutating circuit to receive the triangular wave signal, and according to the average splitting the triangular wave signal into two first-order equalizing currents; the kth shunting unit is electrically connected to the first K-1) The shunt unit receives (2 ^k-1 ) (k-1)-order averaged currents, and averages the 2 ^k-1 (k-1)-order averaged currents to obtain 2 ^k k The step average current, 2≦k≦m, and the first to mth shunt units respectively have 1~2 ^m-1 transformers, one transformer of the first shunt unit is the first transformer, and the kth shunt unit 2 ^{The k-1} transformers are the first, second, and second ^k-1 transformers, respectively, 2≦k≦m. The transformer current equalization device according to claim 19, wherein: each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the The turns ratio of the primary side winding and the secondary side winding is 1:1. The transformer current equalization device according to claim 20, wherein: the first and second ends of the primary winding are respectively a polarity point end and a non-polar point end; and the first side of the secondary side winding The second end is a non-polar point end and a polar point end, respectively. The transformer current equalization device of claim 20, wherein: the first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are more electrically Connected to the second end of the first switch to receive the triangular wave signal, and the first transformer of the first shunting unit divides the current of the triangular wave signal into the two first-order averaged currents according to the turns ratio thereof, and respectively Outputting from the second end of the primary and secondary windings of the first transformer of the first shunt unit; the first ends of the two windings of the first to second ^k-1 transformers of the kth shunt unit are electrically connected And the first ends electrically connected together are sequentially electrically connected to the second ends of the two windings of the first transformer of the (k-1) shunt unit to the second winding of the second ^k-1 transformer a second end for receiving respectively the 2 ^k-1 th (k-1) order of average current and shunting means the k first to 2 ^k-1 turns ratio transformer in accordance with its respective the 2 ^{k -1} (k-1) order average current shunt to obtain 2 ^k k-order average currents, and sequentially from the k-th points The second end of the two windings of the second winding of the first transformer of the flow unit to the second end of the second winding of the ^2k-1 transformer, 2≦k≦m. According to the transformer current sharing device of claim 22, the output circuit includes: an output capacitor; and first, second to second ^m inductors, each inductor having a first end and a second end, The first ends of the first to second ^m inductors are respectively electrically connected to the second end of the two windings of the first transformer of the mth shunt unit to the second ^m-1 transformer of the mth shunt unit a second end of the second winding to receive the 2 ^m m-th order divided current, and the 2 ^m m-th order equalizing current is used as the first to second ^m- phase currents respectively from the first to the second ^m- inductance The second end outputs. And the second ends of the first to the second ^m inductors are electrically connected to the output capacitor to add the first to second ^m phase currents to obtain the output power signal. According to the transformer current sharing device of claim 16, when M=4, the transformer current sharing circuit has: a first shunting unit electrically connected to the commutation circuit to receive the triangular wave signal, and according to And dividing the current of the triangular wave signal into two first-order averaged currents, and the first shunting unit has a first transformer; and a second shunting unit electrically connected to the first shunting unit to receive the two The step divides the current, and divides the two first-order averaged currents evenly to obtain four second-order averaged currents, and the second shunting unit is a first transformer and a second transformer. The transformer current sharing device according to claim 24, wherein: each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the The first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are further electrically connected to the second end of the first switch to receive the triangular wave signal, and the The first transformer of the first shunting unit divides the current of the triangular wave signal into two equal-order average currents according to the turns ratio thereof, and respectively obtains the primary and secondary windings of the first transformer of the first shunting unit. a second end output; the first ends of the two windings of the first and second transformers of the second shunt unit are electrically connected together, and the first ends electrically connected together are more electrically connected to the first shunt unit a second end of the primary and secondary windings of the first transformer to respectively receive the two first-order averaged currents, and divide the two first-order averaged currents equally to obtain four second-order averaged currents, and respectively From the second shunt The two ends of the output winding of the second transformer, a first element, the second second shunt transformer unit outputting a second end of the two windings. According to the transformer current sharing device of claim 25, the output circuit has: first to fourth inductors, each inductor has a first end and a second end, and the first to fourth inductors The first end is electrically connected to the second end of the primary-secondary winding of the first transformer of the second shunting unit, and the second end of the primary-secondary winding of the second transformer of the second shunting unit, respectively Receiving the four second-order equalizing currents outputted by the second shunting unit, and using the four second-order equalizing currents as the first to fourth phase currents, respectively, from the second to fourth inductive And outputting, the second ends of the first to fourth inductors are electrically connected together to add the first to fourth phase currents; and an output capacitor having a second end electrically connected to the first inductor The first end, and a grounded second end, and receiving the summed first to fourth phase currents, and accordingly converted into the output power signal. According to the transformer current sharing device of claim 16, if M belongs to non-2 ^m , m≧1: the transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and the triangular wave is The current of the signal is shunted into non-2 ^m phase currents, the magnitude of each phase current is the same, and the transformer current sharing circuit has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a minimum leakage inductance principle. According to the transformer current sharing device of claim 16, when M=3, the transformer current sharing circuit has: a first transformer having a primary side winding, and a secondary side winding, and the first The first and second side windings of the transformer have a turns ratio of 2:1, and the primary and secondary windings of the first transformer each have a first end electrically connected to the first switch to receive the triangular wave signal One end, and a second end, and the first transformer distributes the current of the triangular wave signal into a first phase current according to a turns ratio thereof, and a shunt current, and the first phase current is from the primary side winding a second end output, and the shunt current is output from the second end of the secondary winding, wherein a ratio of the first phase current to the split current is 1:2; and a second transformer has a a primary winding, and a secondary winding, and the primary and secondary windings of the second transformer have a turns ratio of 1:1, and the primary and secondary windings of the second transformer have an electrical connection The second winding of a transformer Receiving a first end of the split current, and a second end, and the second transformer equally distributes the split current into a second phase current and a third phase current according to a turns ratio thereof, and The second phase current is output from the second end of the primary side winding of the second transformer, and the third phase current is output from the second end of the secondary side winding of the second transformer. According to the transformer current sharing device described in claim 28, when M=3, wherein: the first and second ends of each primary winding are respectively a polarity point end and a non-polar point end; each two The first and second ends of the secondary winding are respectively a non-polar point end and a polarity point end. According to the transformer current sharing device described in claim 28, when M=3, the output circuit has: an output capacitor; first to third coupled inductors, each coupled inductor has a first end and a first The first end of the first coupled inductor is electrically connected to the second end of the primary winding of the first transformer to receive the first phase current, and the first end of the second coupled inductor is electrically connected to the second a second end of the primary winding of the transformer to receive the second phase current, the first end of the third coupled inductor being electrically connected to the second end of the primary winding of the second transformer to receive the third phase current, and The second ends of the first to third coupled inductors are electrically connected to the output capacitor to add the first to third phase currents into the output power signal. A transformer current sharing circuit is applied to a transformer current sharing device, wherein the transformer current sharing device is adapted to be electrically connected to a voltage controller, and the transformer current sharing device comprises a commutation circuit, wherein the voltage controller is configured to detect from An output voltage of the transformer current sharing device is operative to generate a control signal group, the converter circuit receives an input power signal, and is electrically connected to the voltage controller to receive the control signal group, and according to the control signal The group converts the input power signal to obtain a triangular wave signal, and the transformer current sharing circuit includes: a first to mth shunting unit connected in series, electrically connected to the converter circuit to receive the triangular wave signal, and accordingly generated M m-orders share the current, each m-th order equalization current is equal to (1/M) times the current of the triangular wave signal, wherein m≧2, and 2 ^m-1 <M≦2 ^m , and The first to (m-1)th shunt units respectively have 1 to 2 ^m-2 transformers, and the mth shunt unit has (M-2 ^m-1 ) transformers. According to the transformer current sharing circuit described in claim 31, if M=2 ^m and m≧1, the transformer current sharing circuit divides the current of the triangular wave signal by 1/2 times and equalizes m times. And: the first shunting unit is electrically connected to the commutating circuit to receive the triangular wave signal, and according to the average splitting the triangular wave signal into two first-order equalizing currents; the kth shunting unit is electrically connected to the first K-1) The shunt unit receives (2 ^k-1 ) (k-1)-order averaged currents, and averages the 2 ^k-1 (k-1)-order averaged currents to obtain 2 ^k k The step average current, 2≦k≦m, and the first to mth shunt units respectively have 1~2 ^m-1 transformers, one transformer of the first shunt unit is the first transformer, and the kth shunt unit 2 ^{The k-1} transformers are the first, second, and second ^k-1 transformers, respectively, 2≦k≦m. The transformer current sharing circuit according to claim 32, wherein: each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the The turns ratio of the primary side winding and the secondary side winding is 1:1. According to the transformer current sharing circuit of claim 33, wherein: the first and second ends of the primary winding are respectively a polarity point end and a non-polar point end; the first side of the secondary side winding The second end is a non-polar point end and a polar point end, respectively. The transformer current sharing circuit of claim 33, wherein: the first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are more electrically Connected to the second end of the first switch to receive the triangular wave signal, and the first transformer of the first shunting unit divides the current of the triangular wave signal into the two first-order averaged currents according to the turns ratio thereof, and respectively Outputting from the second end of the primary and secondary windings of the first transformer of the first shunt unit; the first ends of the two windings of the first to second ^k-1 transformers of the kth shunt unit are electrically connected And the first ends electrically connected together are sequentially electrically connected to the second ends of the two windings of the first transformer of the (k-1) shunt unit to the second winding of the second ^k-1 transformer a second end for receiving respectively the 2 ^k-1 th (k-1) order of average current and shunting means the k first to 2 ^k-1 turns ratio transformer in accordance with its respective the 2 ^{k -1} (k-1) order average current shunt to obtain 2 ^k k-order average currents, and sequentially from the k-th points The second end of the two windings of the second winding of the first transformer of the flow unit to the second end of the second winding of the ^2k-1 transformer, 2≦k≦m. According to the transformer current sharing circuit of claim 31, when M=4, the transformer current sharing circuit has: a first shunting unit electrically connected to the commutation circuit to receive the triangular wave signal, and according to And dividing the current of the triangular wave signal into two first-order averaged currents, and the first shunting unit has a first transformer; and a second shunting unit electrically connected to the first shunting unit to receive the two The step divides the current, and divides the two first-order averaged currents evenly to obtain four second-order averaged currents, and the second shunting unit is a first transformer and a second transformer. The transformer current sharing circuit according to claim 36, wherein: each transformer has a primary side winding and a secondary side winding, and the two windings have a first end and a second end, and the The first ends of the two windings of the first transformer of the first shunt unit are electrically connected together, and the first ends electrically connected together are further electrically connected to the second end of the first switch to receive the triangular wave signal, and the The first transformer of the first shunting unit divides the current of the triangular wave signal into two equal-order average currents according to the turns ratio thereof, and respectively obtains the primary and secondary windings of the first transformer of the first shunting unit a second end output; the first ends of the two windings of the first and second transformers of the second shunt unit are electrically connected together, and the first ends electrically connected together are more electrically connected to the first shunt unit a second end of the primary and secondary windings of the first transformer to respectively receive the two first-order averaged currents, and divide the two first-order averaged currents equally to obtain four second-order averaged currents, and respectively From the second shunt The two ends of the output winding of the second transformer, a first element, the second second shunt transformer unit outputting a second end of the two windings. According to the transformer current sharing circuit described in claim 31, if M belongs to non-2 ^m , m≧1: the transformer current sharing circuit is electrically connected to the commutation circuit to receive the triangular wave signal, and the triangular wave is The current of the signal is shunted into non-2 ^m phase currents, the magnitude of each phase current is the same, and the transformer current sharing circuit has a multi-layer transformer, and the turns ratio of each layer of the transformer is set according to a minimum leakage inductance principle. According to the transformer current sharing circuit described in claim 31, when M=3, the transformer current sharing circuit has: a first transformer having a primary side winding, and a secondary side winding, and the first The first and second side windings of the transformer have a turns ratio of 2:1, and the primary and secondary windings of the first transformer each have a first end electrically connected to the first switch to receive the triangular wave signal One end, and a second end, and the first transformer distributes the current of the triangular wave signal into a first phase current according to a turns ratio thereof, and a shunt current, and the first phase current is from the primary side winding a second end output, and the shunt current is output from the second end of the secondary winding, wherein a ratio of the first phase current to the split current is 1:2; and a second transformer has a a primary winding, and a secondary winding, and the primary and secondary windings of the second transformer have a turns ratio of 1:1, and the primary and secondary windings of the second transformer have an electrical connection The second winding of a transformer Receiving a first end of the split current, and a second end, and the second transformer equally distributes the split current into a second phase current and a third phase current according to a turns ratio thereof, and The second phase current is output from the second end of the primary side winding of the second transformer, and the third phase current is output from the second end of the secondary side winding of the second transformer. According to the transformer current sharing circuit described in claim 39, when M=3, wherein: the first and second ends of each primary winding are respectively a polarity point end and a non-polar point end; each two The first and second ends of the secondary winding are respectively a non-polar point end and a polarity point end.