JP3379556B2 - Circuit device having switching element - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an inverter, DC-D.
The present invention relates to a circuit device including a switching element such as a C converter.

[0002]

2. Description of the Related Art A method is known in which a capacitor is connected in parallel with a switching element of an inverter or a converter to prevent an excessive voltage from being applied to the switching element when the switch is turned off.

[0003]

By the way, the electric charge accumulated in the capacitor during the off period of the switching element is discharged through the switching element when the switching element is on, resulting in power loss.

Therefore, an object of the present invention is to provide a circuit device capable of reducing power loss due to discharge of a capacitor connected in parallel to a switching element with a simple structure.

[0005]

In order to solve the above problems and achieve the above objects, the present invention will be described with reference to the drawings.
This will be described with reference to No. In addition, the reference numeral here is the book
It is added to help understanding of the claimed invention and
It is not limited . The present invention for achieving the above object has first and second DC power supplies (2, 3) and first and second switching elements (Q1, Q2),
One end of the power supply (2) of the first switching element (Q
1), one end of the first power supply (2) is connected to one end of the second power supply (3), and the other end of the first switching element (Q1) is connected to the second end. Connected to one end of the switching element (Q2), the other end of the second power supply (3) is connected to the other end of the second switching element (Q2), and the first and second power supplies (2) 3) the connection midpoint and the first and second switching elements (Q1
, Q2) is connected to a connection midpoint (8) of the load circuit (7), and the first and second switching elements (Q1
, Q2) connected to first and second drive signal supply circuits (14, 15) for alternately turning on and off the first and second switching elements (Q1, Q2) In the circuit device, the first and second controllers are provided.
The capacitors (C1, C2) and the first and second transistors (1
6, 17) and the first and second diodes (D1, D2)
Provided, one end of said first capacitor (C1) is the first
Is connected to one end of the first switching element (Q1), said first
The first diode (D1) is connected to the first capacitor (C1).
Between the other end and the other end of the first switching element (Q1)
And the charging current of the first capacitor (C1) connected to
The first transistor having a polarity capable of flowing
The collector of the switch (16) is the first switching element.
It is connected to the control terminal of (Q1) and its emitter is the first
Between the first capacitor (C1) and the first diode (D1)
Connected to an interconnection point, the base of which is connected to the first and second
Connected to the connection midpoint (8) of the switching elements (Q1, Q2) of
It is, the first transistor (16) is the base-et
The discharge voltage of the first capacitor (C1) is passed between the mitters.
Has a polarity capable of flowing a current,
The first transistor (16) and the first transistor (16).
When the first capacitor (C1) is discharged, the first switch
It is possible to bypass the drive signal of the driving element (Q1).
Are connected in series with each other, and the second capacitor (C
One end of 2) is one end of the second switching element (Q2)
And the second diode (D2) is connected to the second diode (D2).
The other end of the capacitor (C2) and the second switching element
Is connected between the other end of (Q2) and the second capacitor.
It has a polarity which can flow a charging current of Sa (C2), before
The collector of the second transistor (17) is the second
It is connected to the control terminal of the switching element (Q2), and its emitter is connected to the second capacitor ( C2) and the second die.
Connected to the interconnection point with the ode (D2), whose base is
The second power source (3) is connected to the other end of the second power source (3) .
The transistor (17) is connected between its base and emitter
The discharge current of the second capacitor (C2) can flow.
The second diode (D2) and the second diode (D2)
The second transistor (17) is the second capacitor
When discharging (C2), the second switching element (Q2)
Drive signals directly to each other so that they can be bypassed
Inverter circuit device characterized by being connected to a column
It is related to the storage. The first and second DC power supplies (2, 3) in the present invention may be of any type as long as they can supply a DC voltage. For example, the first and second power supply capacitors 2 shown in the embodiment. It may be 3. In addition, it is desirable to configure as shown in claims 2 to 13.

[0006]

According to the present invention of each claim [effects of the present invention, low
Zero volt switch with a simple circuit consisting of no circuit elements
Preventing discharge to the switching elements of the capacitor for ring
I can . As a result, the electric charge of the capacitor is not wasted in the switching element. Since the power supply or the power supply capacitor is included in the discharge path of the capacitor, the charge of the capacitor is fed back to the power supply and the efficiency is increased. Further, since the driving of the switching element is blocked when the discharge current of the capacitor is flowing, the switching element turns on after the voltage between both terminals of the switching element decreases,
Zero-volt switching at turn-on becomes possible.

[0007]

[First Embodiment] Next, a half bridge type inverter according to the first embodiment will be described with reference to FIGS. In FIG. 1, a series circuit of first and second power supply capacitors 2 and 3 is connected in parallel to a DC power supply 1. Thereby, a positive voltage is obtained at the first power supply terminal 4 connected to the upper end of the first power supply capacitor 2 and the second power supply terminal connected to the lower end of the second power supply capacitor 3. A negative voltage is obtained at 5. The midpoint of connection between the first and second power supply capacitors 2 and 3 is connected to the third power supply terminal, that is, the grad terminal 6. A series circuit of first and second switching elements Q1 and Q2 formed of insulated gate field effect transistors is connected between the first and second power supply terminals 4 and 5. Since the first and second switching elements Q1 and Q2 are field effect transistors,
It has a built-in diode connected in antiparallel between the gate and the source. The load circuit 7 is connected between the connection midpoint 8 of the first and second switching elements Q1 and Q2 and the ground terminal 6. The load circuit 7 includes a primary winding 7a and a secondary winding 7
b and a load 7c connected to the secondary winding 7b, and has an inductance.

First and second switching elements Q1 and Q
A common control signal generation circuit 9, a transformer 10, and resistors 11 and 12 are provided to configure a drive signal supply circuit for alternately controlling ON / OFF of the two. The transformer 10 comprises a primary winding 13 connected to a common control signal generating circuit 9 and first and second switch drive windings 14 and 15 electromagnetically coupled to the primary winding 13. Winding 1
Reference numerals 4 and 15 function as first and second drive signal supply circuits. First switch drive winding 14 having a first polarity
One end of the first switching element Q1 via the resistor 11.
Is connected to the control terminal (gate), and the other end is connected to the connection middle point 8, that is, the source of the first switching element Q1. One end of the second switch driving winding 15 having the second polarity opposite to the first polarity is connected to the control terminal (gate) of the second switching element Q2 via the resistor 12, and the other end is the second Is connected to the lower electrode or source of the switching element Q2. The common control signal generating circuit 9 alternately generates a positive pulse and a negative pulse having a pulse width according to the output voltage command.

In order to achieve zero volt switching at turn-off and turn-on, and to prevent the first and second switching elements Q1 and Q2 from turning on at the same time, the first and second capacitors C1 and C2 and the capacitors And second diode D for forming the charging circuit of
1, D2 and first and second transistors 16 and 17 as discharge circuit forming and ON blocking means are provided. One ends of the first and second capacitors C1 and C2 are the first
And the second switching elements Q1 and Q2 are connected to the upper ends (drains), and the other ends thereof are connected to the connection middle point 8 through the first and second diodes D1 and D2. The collectors of the first and second transistors 16 and 17 that form a discharge current path and function as an ON blocking means are connected to the control terminals (gates) of the first and second switching elements Q1 and Q2, respectively. The emitters are connected to the anodes of the first and second diodes D1 and D2. The base of the first transistor 16 is connected to the connection midpoint 8, and the base of the second transistor 17 is connected to the source of the second switching element Q2 and the second power supply terminal 5.

[0010]

[Operation] In the circuit of FIG. 1, the waveform of each part when the control signal is normally generated from the control signal generation circuit 9 becomes as shown in the section from t1 to t7 of FIG. That is, the first drive signal VS1 of the first switch drive winding 14 is at a high level (ON) of the first switching element Q1 in the sections t1 to t2 and t5 to t6 as shown in FIG. Positive pulse), and the second drive signal V of the second switch drive winding 15
S2 is a high level (positive pulse) indicating that the second switching element Q2 is turned on in the section from t3 to t4 as shown in FIG. 2 (B).
Becomes Mutual intervals t2 to t3, t4 to t5, t6 of ON periods (positive pulses) of the first and second drive signals VS1 and VS2.
When t7 is longer than the charging / discharging time of the capacitors C1 and C2, the drive signals VS1 and VS2 shown in FIGS.
And the gates of the second switching elements Q1 and Q2 are effectively applied. At the time of adjusting the output voltage, the width of the positive pulse of the first and second drive signals VS1 and VS2 can be changed. t1 ~
When the first switching element Q1 is turned on at t2, the first circuit is composed of the first power supply terminal 4, the first switching element Q1, the transformer primary winding 7a of the load circuit 7, and the ground terminal 6. The current in the direction of flows through the load circuit 7. When the second switching element Q2 is turned on from t3 to t4, the ground terminal 6, the primary winding 7a of the load circuit 7, the second switching element Q2, and the second power supply terminal 5 are connected.
A current in the second direction flows through the load circuit 7 in the circuit composed of.

During the ON period of the first switching element Q1, the voltage of the first capacitor C1 is substantially zero and the voltage of the second capacitor C1 is
The capacitor C2 is charged to the sum of the voltage of the second power supply capacitor 3 and the voltage of the primary winding 7a of the load circuit 7, that is, the voltage of the power supply 1. When the gate signal of the first switching element Q1 falls to a low level and is turned off at time t2, the short circuit due to the first switching element Q1 of the first capacitor C1 is released, and the first capacitor C1 becomes The voltage of the first power supply capacitor 2 and the counter electromotive force of the primary winding 7a of the load circuit 7 are charged through the first diode D1. In other words, the capacitor C1 is charged with a voltage obtained by subtracting the voltage of the second switching element Q2 from the voltage of the power source 1. At this time, the first capacitor C1 is charged by resonance with the inductance of the primary winding 7a or with a time constant.
As shown in, the voltage of the first capacitor C1 and the drain-source voltage of the first switching element Q1 gradually increase. As a result, the first switching element Q1
Even if a current is flowing after t2 due to the storage, the product of the current and the voltage becomes small, and the power loss at turn-off can be reduced. Further, it is possible to suppress the generation of high frequency noise at the time of turn-off. When the voltages of the first switching element Q1 and the first capacitor C1 gradually increase from t2 to t3 as shown in FIG. 2 (C), the voltages of the second switching element Q2 and the second capacitor C2 become 2 (D), it gradually decreases. At this time, the discharge of the second capacitor C2 is performed by a circuit including the second capacitor C2, the primary winding 7a of the load circuit 7, the second power supply capacitor 3 and the base-emitter of the transistor 17. In the primary winding 7a, the charging current of the first capacitor C1 and the discharging current of the second capacitor C2 flow from left to right in FIG. The voltage generated in the primary winding 7a by this current has the same direction as the voltage of the first power supply capacitor 2 and has the opposite direction to the voltage of the second power supply capacitor 3. The voltage of the primary winding 7a becomes the same as the voltage of the first and second power supply capacitors 2 and 3 after a predetermined time determined by the circuit constant. In other words, when the second capacitor C2 is completely discharged and this voltage becomes zero, and the first capacitor C1 becomes twice the voltage of the power source 1, that is, the voltage of the first power source capacitor 2, the load circuit Almost all of the voltage of the second power supply capacitor 3 is applied to the primary winding 7 a of No. 7. In the period from t4 to t5 in FIG. 2, the first switching element Q1 turns on and the second switching element Q2 turns off, contrary to the period from t2 to t3. At this time, the discharging of the first capacitor C1 is performed by a circuit composed of the first capacitor C1, the first power supply capacitor 2, the primary winding 7a, and the base-emitter of the transistor 16. In addition, the second capacitor C
Charging of 2 is performed by a circuit composed of the second power supply capacitor 3, the primary winding 7a, the second capacitor C2, and the second diode D2.

In this embodiment, in order to achieve zero volt switching of the first and second switching elements Q1 and Q2, the first and second switching elements Q1 and Q2.
These are turned on after the voltage of has become substantially zero volt. This achieves zero volt switching at both turn-off and turn-on, reducing power loss.

By the way, due to variations in manufacturing the control signal generating circuit 9, switching elements before the voltage of the capacitors C1 and C2 in parallel with the first and second switching elements Q1 and Q2 becomes substantially zero volt. On-drive signals for Q1 and Q2 may be generated. In addition, the ON period may be extended due to variations in the storage times of the switching elements Q1 and Q2. If the first and second switching elements Q1 and Q2 are turned on before the voltage of the capacitors C1 and C2 in parallel with the first and second switching elements Q1 and Q2 become 0 volt, the A discharge current flows through the first and second capacitors C1 and C2, causing power loss. Also, the first and second switching elements Q
When 1 and Q2 are turned on at the same time, a short circuit of the power supply 1 is formed. However, in the circuit according to the invention of FIG. 1, the first and second switching elements Q1, Q2 are applied until the voltage of the first and second capacitors C1, C2 is substantially zero volts.
2 is blocked. For example, even if the rising edge of the control signal VS1 of the first switching element Q1 and the falling edge of the drive signal VS2 of the second switching element Q2 coincide with each other at time t8 in FIG. 2 (A), the discharge of the first capacitor C1 is discharged. While the current is flowing, the first switching element Q1
Drive signal VS1 is bypassed, and the first switching element Q1 is prevented from turning on. That is, the first capacitor C
During the period in which the discharge current of 1 flows between the first capacitor C1, the first power supply capacitor 2, the primary winding 7a and the base-emitter of the transistor 16, the gate and source of the first switching element Q1 are Is short-circuited by the transistor 16 and the diode D1 and the first switching element Q1 is not turned on at the time t8. When the discharge of the first capacitor C1 is completed at time t9, the transistor 16 is turned off, so that a voltage is applied to the gate of the first switching element Q1 and it is turned on. As a result, it is possible to prevent the first and second switching elements Q1 and Q2 from being turned on at the same time, and it is possible to reliably achieve zero volt switching. When the second switching element Q2 is turned on, the same operation as when the first switching element Q1 is turned on occurs.
Since the charges of the capacitors C1 and C2 are fed back to the power supplies 2 and 3, the efficiency is increased.

[0014]

[Second Embodiment] Next, a half-bridge type inverter circuit according to a second embodiment will be described with reference to FIG. However, in FIG. 3 and FIG. 4 to FIG. 13 described later, portions common to FIG. The circuit of FIG. 3 is modified so as to be vertically symmetrical with respect to the connection middle point 8. However, in FIG. 3, the first and second switching elements Q1, Q2 and the first and second transistors 16,
Reference numerals 17 have opposite conductivity types. The same effects as those of the first embodiment can be obtained by the second embodiment.

[0015]

[Third Embodiment] Next, a full bridge type inverter of a third embodiment shown in FIG. 4 will be described. In Figure 4,
Instead of the capacitors 2 and 3 of FIG. 1, third and fourth switching elements Q3 and Q4 are connected. Third and fourth
In connection with the switching elements Q3 and Q4 of the capacitor C
3, C4, transistors 80, 81, diode 82,
83, drive windings 84 and 85, and resistors 86 and 87 are provided as in the case of the first and second switching elements Q1 and Q2. The drive windings 84 and 85 are formed integrally with the transformer 10. As it is well known in the circuit of FIG. 4, the first
And the fourth switching elements Q1 and Q4 are simultaneously turned on, and the second and third switching elements Q2 and Q3 are simultaneously turned on. Since the ON / OFF operation of each switching element Q1 to Q4 is the same as that of the switching elements Q1 and Q2 of FIG. 1, the circuit of FIG. 4 has the same effect as the circuit of FIG. In addition, in the full bridge type inverter circuit of FIG. 4 , the circuit system of the embodiments other than the first embodiment can be applied.

[0016]

[Fourth Embodiment] In a fourth embodiment shown in FIG. 5, diodes D5 and D6 are connected to the paths of the discharge currents of the first and second capacitors C1 and C2, and an ON control signal is generated based on this voltage. Are in control. That is, in order to prevent the first switching element Q1 from being turned on when the diode D5 is turned on by discharging the first capacitor C1, the diode 22 is provided between the gate and the source of the first switching element Q1.
The transistor 20 is connected through the transistor 20, the transistor 21 is connected between the base and the emitter of the transistor 20, and the bias power supply 25 and the transistors 20 and 2 are connected.
The resistors 23 and 24 are connected between the base and the emitter of the transistor 1, and the diode D5 is connected between the base and the emitter of the transistor 21. Similarly, a diode 28 is provided between the gate and the source of the second switching element Q2.
The transistor 26 is connected via the transistor 26, the transistor 27 is connected between the base and the emitter of the transistor 26, and the bias power source 31 and the transistors 26, 27 are connected.
The resistors 29 and 30 are connected between the bases of the transistors, and the diode D6 is connected between the base and the emitter of the transistor 27.

When the diode D5 is turned on by the discharge of the first capacitor C1, the transistor 21 is controlled to be turned off, while the transistor 20 is turned on, and the on control signal of the first switching element Q1 is supplied to the diode 22. Bypassing to the transistor 20, the first switching element Q1 is prevented from turning on. When the discharge of the first capacitor C1 is finished and the diode D5 is turned off, the transistor 21 is turned on, and conversely, the transistor 20 is turned off, and the blocking of the on drive signal is released. Similarly, the second switching element Q generated by discharging the second capacitor C2
2 ON blocking action occurs. As is apparent from the above, the circuit of FIG. 5 can also obtain the same effects as the circuit of FIG.

[0018]

[Fifth Embodiment] A half-bridge type inverter according to a fifth embodiment shown in FIG. 6 will be described below. The circuit of FIG. 6 is shown in FIG.
In this circuit, one capacitor C is provided instead of the two capacitors C1 and C2. In FIG. 6, the capacitor C is the anode of the first diode D1 and the second diode D1.
It is connected between two anodes. In FIG. 6, except for this capacitor C, it is formed in the same manner as in FIG.

[0019]

[Operation] In FIG. 6, operations other than charging and discharging of the capacitor C are the same as those in FIG. First,
During the ON period of the switching element Q2, the capacitor C is the first
Since the diode D1, the second switching element Q2, and the base-emitter of the transistor 17 are short-circuited, the voltage of the capacitor C is zero. When the switching element Q2 is controlled to be off, the voltage V _DS between both terminals rises, and the potential at the connection middle point 8 becomes the second switching element Q2.
2 is higher than the source potential. As a result, the second power supply capacitor 3, the load primary winding 7a, and the transistor 1
A charging current for the capacitor C flows between the base-emitter 6 and the circuit composed of the capacitor C and the second diode D2. As a result, as in the circuit of FIG.
Is turned on, the turning on of the first switching element Q1 is blocked. When the capacitor C is charged to the same value as the voltage of the power source 1, the charging current of the capacitor C stops flowing and the first
The drain potential and the source potential of the switching element Q1 are substantially equal to each other, and the drain-source voltage V
_DS1 becomes almost zero. Since the transistor 16 is turned off in synchronization with the end of the charging of the capacitor C, the driving by the first drive winding 14 becomes possible and the first switching element Q1 is turned on. This achieves zero volt switching as in FIG. When the first switching element Q1 is turned off, a voltage drop occurs here, and the potential at the connection middle point 8 drops. Therefore, the capacitor C
A discharge circuit for the capacitor C is formed by a circuit consisting of the first diode D1, the load primary winding 7a, the second power supply capacitor 3 and the base-emitter of the transistor 17, and this discharge current flows. During the period, as in FIG. 1, the transistor 17 is turned on and the second switching element Q
2 ON drive is blocked. When the discharge of the capacitor C ends and this voltage becomes zero, the transistor 17 is turned off, the control signal V _S2 of the winding 15 effectively acts on the second switching element Q2, and the second switching element Q2.
Is turned on and zero volt switching is achieved.
Therefore, the circuit shown in FIG. 6 can obtain the same effects as the circuit shown in FIG. 1, and the number of capacitors can be reduced by one.

[0020]

[Sixth Embodiment] FIG. 7 shows an RCC type DC-D according to the present invention.
A C converter or switching regulator is shown. In FIG. 7, a series circuit of a transformer 43 and a switching element 45 composed of a field effect transistor similar to that of FIG. 1 is connected between the first and second power supply terminals 41 and 42 connected to the DC power supply 40. ing. Transformer 43-2
An output rectifying / smoothing circuit 50 including a diode 47 and a capacitor 48 is connected to the secondary winding 46. 2
The polarity of the next winding 46 is determined so as to turn on the diode 49 during the off period of the switching element 45. A drive winding 51 is provided in the transformer 43 in order to control the switching element 45 on and off by feedback by self-excitation. The drive winding 51 includes primary and secondary windings 44 and 46.
Is electromagnetically coupled to. One end of the drive winding 51 is connected to the control terminal (gate) of the switching element 45 via the capacitor 52 and the resistor 53, and the other end is connected to the source of the switching element 45. The starting resistor 54 is connected between the one power supply terminal 41 and the gate of the switching element 45.

To enable operation according to the invention, a zero volt switching capacitor 55 is connected in parallel with the switching element 45 via a charging diode 56. That is, one end of the capacitor 55 is connected to the upper end (drain) of the switching element 45, and the other end is connected to the lower end (source) of the switching element 45 via the diode 56. Further, a PNP-type transistor 57 for forming an ON blocking means is connected between the control terminal (gate) and the source of the switching element 45, and a discharge is made between the base of the transistor 57 and the anode of the diode 56. An NPN type transistor 58 which functions as a circuit forming and ON blocking means is connected. The collector of the transistor 58 is connected to the gate of the switching element 45 via the resistor 59, the emitter is connected to the diode 56, and the base is connected to the lower power supply terminal (ground terminal) 42. A well-known voltage control circuit 60 such as Japanese Patent Publication No. 3-57712 is connected to the base of the transistor 57.

The basic operation of the switching regulator of FIG. 7 is the same as that of the conventional RCC type switching regulator, and the transformer 4 is turned on while the switching element 45 is on.
Energy is stored in 3, and the diode 49 conducts while the switching element 45 is off, and the energy of the transformer 43 is released to the capacitor 48 and the load. The voltage control circuit 60 responds to the voltage control signal by turning on the transistor 5
Adjust when to turn on 7. When the transistor 57 is turned on, the control terminal (gate) of the switching element 45 is connected to the ground terminal 42 and the switching element 45 is turned off.

When the switching element 45 is turned off, the voltage 40
And the voltage of the primary winding 44 causes the capacitor 55 to be charged to approximately twice the voltage of the power supply 40. Capacitor 55
Voltage, that is, the voltage of the switching element 45 gradually increases as shown in FIG. 7, so that the zero-volt switching of the switching element 45 is achieved. The capacitor 5
The charging current of 5 flows through the diode 56. When the release of energy from the transformer 43 ends at time t3 in FIG. 8, the diode 47 is turned off and the secondary winding 46 is disconnected from the capacitor 48. Accordingly, the clamp of the charging voltage of the capacitor 55 due to the sum (2E) of the voltage E of the power supply 40 and the voltage of the primary winding 44 is released, and the capacitor 55 is resonated with the inductance of the primary winding 44. Discharge starts, and the voltage of the capacitor 55 gradually decreases as shown in the section from t3 to t4. The discharge current of the capacitor 55 is the same as that of the capacitor 55 and the primary winding 44.
And the power supply 40 and the base-emitter of the transistor 58. As a result, during the period when the discharge current of the capacitor 55 is flowing, the transistor 58
And 57 are turned on, the gate and the source of the switching element 45 are short-circuited, and the switching element 45 is kept off. Therefore, even if a signal indicating that the switching element 45 is turned off is generated from the control circuit 60 before t4 in FIG. 8, the off release is not achieved and the transistor 57 continues to be turned on. Since the period from t3 to t4 in FIG. 8 is a period in which the capacitor 55 has a charge, if the switching element 45 is turned on in this period, the capacitor 5
5 is short-circuited by the switching element 45, causing power loss and noise. On the other hand, if the switching element 45 is prevented from being turned on during the period t3 to t4 and then turned on, the above-mentioned power loss and noise do not occur. Even when the voltage of the capacitor 55 does not become zero at t4 as shown by the dotted line in the section from t3 to t4 in FIG.
By delaying by the action of, a certain reduction in power loss is achieved.

[0024]

[Seventh Embodiment] FIG. 9 shows a DC-DC converter according to a seventh embodiment. The circuit of FIG . 9 is obtained by modifying the circuit of FIG. 7 into a separately excited type, and connecting the PWM pulse generation circuit 60a to the control terminal of the switching element 45. Others are shown in Figure 7.
Is configured in the same and, parts in common with FIG. 7 in FIG. 9 are denoted by the same reference numerals. In addition, Transis
The base of the data 57 is the bias power supply terminal + V via the resistor 59.
It is connected to cc. The PWM pulse generation circuit 60a generates a pulse train that turns on / off the switching element 45 at a predetermined cycle. Other operations are the same as those in FIG. 7, and the same effects are obtained. The switching element 45 in FIG. 9
Can be a bipolar transistor.

[0025]

[Eighth Embodiment] Next, a modified half-bridge type or SEPP type inverter of an eighth embodiment shown in FIG. 10 will be described. In FIG. 10, the load circuit 7 is connected in parallel to the second switching element Q2 via the conversion capacitor 3a. Others are the same as in FIG. An alternating current is supplied to the load circuit 7 by charging / discharging the conversion capacitor 3a corresponding to the alternating ON / OFF of the first and second switching elements Q1 and Q2. Blocking of the switching elements Q1 and Q2 before the discharge of the capacitors C1 and C2 is completed is achieved in the same manner as in FIG. Therefore, the same effect as that of the circuit of FIG. 1 can be obtained. In the modified half-bridge type inverter circuit shown in FIG. 10 , the first embodiment is also used .
Other embodiments can be adopted.

[0026]

[Ninth Embodiment] FIG. 11 shows an inverter according to a ninth embodiment. The circuit of FIG. 11 is a modification of the circuit of FIG. 1 to a center tap type push-pull circuit, in which a center tap type output transformer 70 is provided.
The DC power supply 1 is connected between the center tap of No. 1 and the connection middle point 8, one end of the primary winding 71 is connected to the first switching element Q1, and the other end is connected to the second switching element Q2. , the load in the secondary winding 72 73 is connected.
The charging current of the first capacitor C1 flows through the circuit of the DC power source 1, the upper half of the primary winding 71, the capacitor C1 and the diode D1. The discharge current of the capacitor C1 flows in a circuit composed of the capacitor C1 and the upper half of the primary winding 71, the power source 1, and the base-emitter of the transistor 16 due to resonance between the capacitor C1 and the inductance of the primary winding 71. Charging and discharging of the second capacitor C2 is likewise achieved. Capacitors C1 and C2 are 2 of the voltage of power supply 1.
Charged twice. Switching elements Q1 and Q2 of FIG.
The operation of zero-volt switching is substantially the same as that of the circuit of FIG. 1, and the same effect as that of FIG. 1 is obtained.

[0027]

[Tenth Embodiment] FIG. 12 shows a tenth embodiment. The 12 Ru der a modification of a method in which use one capacitor C of the circuit of FIG. In FIG. 12, a common drive signal input terminal 13a is connected to the control terminals (gates) of the first and second switching elements Q1 and Q2 via resistors 11 and 12. The first and second switching elements Q1 and Q2 are formed into an N-channel type and a P-channel type and have polarities opposite to each other. The drain of the second switching element Q2 is connected to the ground.
In order to perform zero volt switching, a series circuit of an NPN type transistor 16 and a PNP type transistor 17 is connected between the control terminals (gates) of the first and second switching elements Q1 and Q2, and the bases of these are connected. Each of them is connected to the connection middle point 8. The capacitor C is the first
Is connected between the upper end (drain) of the switching element Q1 and the connection point of the first and second transistors 16 and 17. The common drive signal supply terminal 13a is a forward pulse V for turning on the first switching element Q1.
_S1 and the negative pulse V _S2 for turning on the second switching element Q2 are alternately generated.

First and second switching elements Q1 and Q
The operation of performing DC-AC conversion by alternating ON / OFF of 2 is the same as the circuit of FIG. Also, one capacitor C
The operation of achieving zero volt switching by means of FIG.
Is almost the same as. During the ON period of the second switching element Q2, the connection middle point 8 becomes the ground, so that the capacitor C is charged to the voltage of the power source 1. When the second switching element Q2 is turned off, the voltage V _DS between the both terminals rises, and the potential at the connection middle point 8 rises. As a result, the discharge current of the capacitor C flows in the circuit including the capacitor C, the first power supply capacitor 2, the load primary winding 7a, and the base-emitter of the first transistor 16. As a result, as in the circuit of FIG. 1, turning on the transistor 16 prevents turning on the first switching element Q1. When the discharge of the capacitor C is completed, the first switching element Q
The drain potential and the source potential of 1 become almost equal, and the drain-source voltage V _DS1 becomes almost zero.
The transistor 16 is synchronized with the end of the discharge of the capacitor C.
Is turned off, it becomes possible to drive by the drive signal of the drive terminal 13a, and the first switching element Q1 is turned on. This achieves zero volt switching as in FIG. When the first switching element Q1 is turned off, a voltage drop occurs here, and the potential at the connection middle point 8 drops. Therefore, the power source 1, the capacitor C, the emitter-base of the second transistor 17, the load primary winding 7
A circuit including a and the second power supply capacitor 3 forms a charging circuit for the capacitor C, and the transistor 17 is turned on as in FIG. 1 while the charging current is flowing,
On-drive of the second switching element Q2 is blocked.
When this voltage reaches the voltage of the power supply 1 after the charging of the capacitor C is completed, the transistor 17 is turned off, the drive signal is effectively applied to the second switching element Q2, and the second switching element Q2 is turned on. , Zero volt switching is achieved. Therefore, the circuit of FIG. 12 can also obtain the same effects as the circuit of FIG. 1, and further reduce the number of capacitors by one.

[0029]

[Eleventh Embodiment] Next, an RCC type DC-DC converter of an eleventh embodiment will be described with reference to FIG . However, in FIG. 13, the same parts as those in FIG. 7 are designated by the same reference numerals and the description thereof will be omitted. In the circuit of FIG. 13, a bipolar transistor is used as the switching element 45, and a diode 61 is connected instead of the transistor 58 of FIG. In FIG. 9, the diode 61 is connected between the base of the switching element (transistor) 45 and the anode of the diode 56. Further, a parallel circuit of a diode 62 and a capacitor 63 is connected between the drive winding 51 and the base of the switching element 45.

Also in this embodiment, energy is stored in the transformer 43 during the ON period of the switching element 45 and is discharged through the diode 47 during the OFF period. The adjustment of the output voltage is achieved by controlling the bypass amount of the base current by the transistor 57. The on-start of the switching element 45 is achieved by the forward voltage (upward voltage) of the drive winding 51. The start of turning off the switching element 45 is achieved by shifting the switching element 45 to a non-saturation region or saturating the transformer 43.

When the switching element 45 is turned off, the capacitor 55 is charged by the circuit composed of the power supply 40, the primary winding 44, the capacitor 55 and the diode 56. At this time, the capacitor 55 is charged to twice the voltage E of the power supply 40. Since the capacitor 55 is charged by resonance with the inductance 44, this voltage gradually increases, and zero-volt switching of the switching element 45 and noise suppression are achieved. When the switching element 45 continues to be turned off and the energy of the transformer 43 is released to turn off the diode 47, the clamp of the capacitor 55 is released, and the capacitor 55 and the inductance of the primary winding 44 resonate to cause the capacitor to operate. 55, primary winding 44, power supply 40, drive winding 51, and diode 6
A discharge current flows in the discharge circuit including the resistor 2, the resistor 53, and the diode 61, and the voltage of the capacitor 55 drops to zero volt. While the discharging current of the capacitor 55 is flowing, the base of the switching element 45 is kept at a level close to the ground, so that the switching element 45 is kept off. When the capacitor 55 is completely discharged, the drive winding 51
The switching element 45 is turned on based on the positive voltage or the current of the starting resistor 54. Switching element 4
Since the voltage of the capacitor 55 is zero when 5 is turned on, the operation of discharging the charge of the capacitor 55 through the switching element 45 does not occur. This achieves reduction of power loss and suppression of noise. Note that the third diode 64 is connected to the diode 56 as shown by the dotted line in FIG.
Connected in antiparallel to that, or the third diode 64 Da to
It can be connected in anti-parallel to the series circuit of the ions 61 and 56 .

[0032]

[Twelfth Embodiment] Next, a half-bridge type inverter circuit according to a twelfth embodiment will be described with reference to FIG . Figure
In the circuit of 14 , the third and fourth diodes D3 and D4 are connected in place of the transistors 16 and 17 of the circuit of FIG. 1, and the fifth and sixth diodes D5 and D6 are added, and The second switching elements Q1 and Q2 are bipolar transistors, and the first and second capacitors C
Instead of 1, C2, one capacitor C is provided as in FIG. The fifth and sixth diodes D5 and D6 are
The first and second diodes D1 and D2 and the third and fourth diodes D3 and D4 are connected in anti-parallel to the series circuit, respectively . Also, the drain, source and gate of the field effect transistor of FIG. 1 are replaced by the collector, emitter and base of the bipolar transistor.

The basic operation of the circuit of FIG. 14 is the same as that of FIG. The same working effect as that of the fifth embodiment can be obtained by the twelfth embodiment.

[0034]

[Thirteenth Embodiment] The thirteenth embodiment shown in FIG. 15 is shown in FIG.
This is a modification of part of the twelfth embodiment of the fourth aspect. In this embodiment, the fifth and sixth diodes D5, D6 are anti-parallel connected to the first and second diodes D1, D2.

[0035]

MODIFICATION The present invention is not limited to the above-mentioned embodiments, and the following modifications are possible. (1) a switching element 45 to the circuit of FIG. 7 and FIG. 13
It is also applicable to a forward type converter in which the diode 47 is turned on when is turned on. (2) In FIG. 2, the pause period (t2 to t3) is provided between the drive signals V _S1 and V _S2 of the drive windings 14 and 15, but the pause period may be omitted. Capacitors C1 and C2 can be provided without this rest period.
The period during which the current flows is automatically a rest period.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an inverter of a first embodiment.

FIG. 2 is a waveform diagram of each part of FIG.

FIG. 3 is a circuit diagram showing an inverter of a second embodiment.

FIG. 4 is a circuit diagram showing an inverter of a third embodiment.

FIG. 5 is a circuit diagram showing an inverter of a fourth embodiment.

FIG. 6 is a circuit diagram showing an inverter of a fifth embodiment.

FIG. 7 is a circuit diagram showing a DC-DC converter of a sixth embodiment.

FIG. 8 is a waveform diagram showing the voltage of the switching element of FIG.

FIG. 9 is a circuit diagram showing a DC-DC converter of a seventh embodiment.

10 is a circuit diagram showing an inverter of the embodiment of FIG.

FIG. 11 is a circuit diagram showing an inverter of a ninth embodiment.

FIG. 12 is a circuit diagram showing an inverter of a tenth embodiment.

FIG. 13 is a circuit diagram showing a DC-DC converter of an eleventh embodiment.

FIG. 14 is a circuit diagram showing an inverter of a twelfth embodiment.

FIG. 15 is a circuit diagram showing an inverter of a thirteenth embodiment .

[Explanation of symbols]

Q1 and Q2 switching elements C1 and C2 capacitors D1 and D2 diodes

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI H02M 7/538 H02M 7/538 (56) Reference JP-A-4-368474 (JP, A) JP-A-5-292743 (JP , A) JP-A-5-64445 (JP, A) JP-A-63-265570 (JP, A) JP-A-63-73884 (JP, A) JP-B-3-57712 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02M ⁷ /42-7/98 H02M 3/28 H02M 1/08

Claims (13)

(57) [Claims] 1. A first and a second DC power supply (2, 3) and a first and a second switching element (Q1, Q2),
One end of the first power supply (2) is connected to one end of the first switching element (Q1), and the first power supply (2)
Of the second switching element (Q2) is connected to one end of the second power source (3), and the other end of the first switching element (Q1) is connected to one end of the second switching element (Q2). The other end of the power source (3) is connected to the second switching element (Q2
) Connected to the other end of the first and second power supplies (2,
A load circuit (7) is connected between the connection middle point of 3) and the connection middle point (8) of the first and second switching elements (Q1, Q2), and the first and second switching elements are connected. First and second drive signal supply circuits (14, 15) for alternately turning on / off the first and second switching elements (Q1, Q2) are connected to control terminals of (Q1, Q2). In the inverter circuit device, the first and second capacitors (C1, C2) and the first and second capacitors
Transistors (16, 17) and first and second diodes
(D1, D2) are provided, and one end of the first capacitor (C1) is connected to the first switch.
The first diode (D1) is connected to one end of a ching element (Q1), and the first diode (D1) is connected to the first capacitor.
The other end of (C1) and the other of the first switching element (Q1)
Is connected between the end and the first capacitor (C1)
The first transistor (16) has a polarity that allows a charging current to flow, and the collector of the first transistor (16) is the first transistor.
Connected to the control terminal of the switching element (Q1) of
The emitter includes the first capacitor (C1) and the first capacitor (C1).
Connected to the interconnection point with Iodo (D1) and its base
Is the connection of the first and second switching elements (Q1, Q2)
The first transistor (16) is connected to the midpoint (8) and has its base-emitter
Through the discharge current of the first capacitor (C1)
The first diode (D1) and the first transistor having a polarity
The capacitor (16) is located before the first capacitor (C1) is discharged.
Bypasses the drive signal of the first switching element (Q1)
So that they are connected in series with each other , one end of the second capacitor (C2) is connected to the second switch.
The second diode (D2) is connected to one end of a ching element (Q2), and the second diode (D2) is connected to the second capacitor.
The other end of (C2) and the other of the second switching element (Q2)
Is connected between the end of the second capacitor (C2)
The second transistor (17) has a polarity that allows a charging current to flow, and the collector of the second transistor (17) is the second transistor.
Connected to the control terminal of the switching element (Q2) of
The emitter is the second capacitor (C2) and the second capacitor (C2).
Connected to the interconnection point with Iodo (D2) and its base
Is connected to the other end of the second power supply (3) and the second transistor (17) is connected to its base emitter.
The discharge current of the second capacitor (C2)
The second diode (D2) and the second transistor having a polarity capable of flowing
The capacitor (17) is located before the second capacitor (C2) is discharged.
The drive signal for the second switching element (Q2) is bypassed.
Are connected in series with each other so that
An inverter circuit device characterized by the above. 2. The first and second DC power supplies (2, 3) and first and second switching elements (Q1, Q2) of opposite conductivity type to each other , and the first and second switches.
One end of the ring element (Q1, Q2) are connected to each other, the first end of the power (2) is connected to the other end of said first switching element (Q1), said first power supply (2) the other end is connected to one end of said second power source (3), before Symbol second
The other end of the power supply (3) of the second switching element (Q
2) connected to the other end of the first and second power supplies (2,
The load circuit (7) is connected between the connection middle point of 3) and the connection middle point (8) of the first and second switching elements (Q1, Q2), and the first and second switching elements are connected. (Q1, Q2) control terminals and the first and second switches.
First and second drive signal supply circuits (1) for alternately turning on / off the first and second switching elements (Q1, Q2) between the other end of the switching elements (Q1, Q2).
4 and 15) are respectively connected to the inverter circuit device, the first and second capacitors (C1 and C2) are opposite to each other.
First and second transistors (16, 1) having an electrotype
7) and the first and second diodes (D1, D2) are provided.
Is, one end of the first capacitor (C1) is the first switch
The first diode (D1) is connected to one end of a ching element (Q1), and the first diode (D1) is connected to the first capacitor.
The other end of (C1) and the other of the first switching element (Q1)
Is connected between the end and the first capacitor (C1)
The first transistor (16) has a polarity that allows a charging current to flow, and the collector of the first transistor (16) is the first transistor.
Connected to the control terminal of the switching element (Q1) of
The emitter includes the first capacitor (C1) and the first capacitor (C1).
Connected to the interconnection point with Iodo (D1) and its base
Is connected to the other end of the first switching element (Q1).
It is, the first transistor (16) is the base-emitter
Through the discharge current of the first capacitor (C1)
The first diode (D1) and the first transistor having a polarity
The capacitor (16) is located before the first capacitor (C1) is discharged.
Bypasses the drive signal of the first switching element (Q1)
So that they are connected in series with each other , one end of the second capacitor (C2) is connected to the second switch.
The second diode (D2) is connected to one end of a ching element (Q2), and the second diode (D2) is connected to the second capacitor.
The other end of (C2) and the other of the second switching element (Q2)
Is connected between the end of the second capacitor (C2)
The second transistor (17) has a polarity that allows a charging current to flow, and the collector of the second transistor (17) is the second transistor.
Connected to the control terminal of the switching element (Q2) of
The emitter is the second capacitor (C2) and the second capacitor (C2).
Connected to the interconnection point with Iodo (D2) and its base
Is connected to the other end of the second switching element (Q2).
And the second transistor (17) has its base emitter.
The discharge current of the second capacitor (C2)
The second diode (D2) and the second transistor having a polarity capable of flowing
(17) is the above-mentioned capacitor when the second capacitor (C2) is discharged.
To bypass a drive signal of the second switching element (Q2)
Must be connected in series with each other so that
Inverter circuit device characterized by. 3. A direct current power supply (1) and first, second, third and fourth switching elements (Q1, Q2, Q3, Q4), one end of said direct current power supply ( 1 ) being the first And a third switching element (Q1, Q3) respectively connected to one end of the first and third switching elements (Q1, Q3).
) Has the other end of the second and fourth switching elements (Q2
, Q4 ), respectively , and the other end of the DC power supply ( 1 ) is connected to the other ends of the second and fourth switching elements (Q2 , Q4 ), respectively . wherein a connection point 2 of the switching elements (Q1, Q2) third and fourth switching elements (Q 3, Q
The load circuit (7) is connected between the connection middle point of ( 4 ) and the first, second, third and fourth switching elements (Q1).
, Q2, Q3, Q4) control terminals of the first, second, third and fourth drive signal supply circuits (14, 15, 84, 85).
In the inverter circuit device to which is connected the first, second, third and fourth capacitors (C1, C2, C
3, C4) and the first, second, third and fourth transistors
(16, 17, 80, 81) and the first, second, third and third
4 diodes (D1, D2, 82, 83) are provided, and one end of the first capacitor (C1) is connected to the first switch.
The first diode (D1) is connected to one end of a ching element (Q1), and the first diode (D1) is connected to the first capacitor.
The other end of (C1) and the other of the first switching element (Q1)
Is connected between the end and the first capacitor (C1)
The first transistor (16) has a polarity that allows a charging current to flow, and the collector of the first transistor (16) is the first transistor.
Connected to the control terminal of the switching element (Q1) of
The emitter includes the first capacitor (C1) and the first capacitor (C1).
Connected to the interconnection point with Iodo (D1) and its base
Is the connection of the first and second switching elements (Q1, Q2)
The first transistor (16) is connected to the midpoint (8) and has its base-emitter
Through the discharge current of the first capacitor (C1)
The first diode (D1) and the first transistor having a polarity
The capacitor (16) is located before the first capacitor (C1) is discharged.
Bypasses the drive signal of the first switching element (Q1)
So that they are connected in series with each other , one end of the second capacitor (C2) is connected to the second switch.
The second diode (D2) is connected to one end of a ching element (Q2), and the second diode (D2) is connected to the second capacitor.
The other end of (C2) and the other of the second switching element (Q2)
Is connected between the end of the second capacitor (C2)
The second transistor (17) has a polarity that allows a charging current to flow, and the collector of the second transistor (17) is the second transistor.
Connected to the control terminal of the switching element (Q2) of
The emitter is the second capacitor (C2) and the second capacitor (C2).
Connected to the interconnection point with Iodo (D2) and its base
Is connected to the other end of the second switching element (Q2).
And the second transistor (17) has its base emitter.
The discharge current of the second capacitor (C2)
The second diode (D2) and the second transistor having a polarity capable of flowing
The capacitor (17) is located before the second capacitor (C2) is discharged.
The drive signal for the second switching element (Q2) is bypassed.
Are connected in series with each other so that one end of the third capacitor (C3) is connected to the third switch (C3).
The third diode (82) is connected to one end of a ching element (Q3), and the third diode (82) is connected to the third capacitor.
In addition to the other end of (C3) and the third switching element (Q3)
Connected between the end and the third capacitor (C3)
The third transistor (80) has a polarity that allows a charging current to flow and the collector of the third transistor (80) is the third transistor.
Connected to the control terminal of the switching element (Q3) of the device , the emitter of which is connected to the third capacitor ( C3) and the third capacitor ( C3).
It is connected to the interconnection point with the ion (82) and its base
Is the connection of the third and fourth switching elements (Q3, Q4).
Connected to the middle point, the third transistor (80) is connected to its base emitter.
The discharge current of the third capacitor (C3)
The third diode (82) and the third transistor have a polarity capable of passing through.
When the star (80) discharges the third capacitor (C3)
The drive signal for the third switching element (Q3) is bypassed.
Are connected in series to each other so that one end of the fourth capacitor (C4) is connected to the fourth switch.
Is connected to one end of a teaching element (Q4), and the fourth diode (83) is the fourth capacitor.
The other end of (C4) and the other of the fourth switching element (Q4)
Of the fourth capacitor (C4) connected between
The collector of the fourth transistor (81) has a polarity that allows a charging current to flow, and the collector of the fourth transistor (81) is the fourth
Connected to the control terminal of the switching element (Q4) of
The emitter is connected to the fourth capacitor (C4) and the fourth capacitor (C4).
It is connected to the interconnection point with the iodine (83) and its base
Connected to the other end of the fourth switching element (Q4)
And the fourth transistor (81) has its base emitter.
Discharge current of the fourth capacitor (C4)
A fourth diode (83) and a fourth transistor having a polarity capable of passing through.
The star (81) discharges the fourth capacitor (C4).
The drive signal for the fourth switching element (Q4) is bypassed.
Connected in series with each other so that they can pass
Inverter circuit device according to claim Rukoto. 4. Having first and second DC power supplies (2, 3) and first and second switching elements (Q1, Q2),
One end of the first power supply (2) is connected to one end of the first switching element (Q1), and the first power supply (2)
Of the second switching element (Q2) is connected to one end of the second power source (3), and the other end of the first switching element (Q1) is connected to one end of the second switching element (Q2). The other end of the power source (3) is connected to the second switching element (Q2
) Connected to the other end of the first and second power supplies (2,
A load circuit (7) is connected between the connection middle point of 3) and the connection middle point (8) of the first and second switching elements (Q1, Q2), and the first and second switching elements are connected. First and second drive signal supply circuits (14, 15) for alternately turning on / off the first and second switching elements (Q1, Q2) are connected to control terminals of (Q1, Q2). In the inverter circuit device, the first and second capacitors (C1, C2) and the first and second capacitors (C1, C2)
2, third and fourth diode (D5,22, D6,2
8) and the first, second, third and fourth transistors (2
0, 21, 26, 27) and the first, second, third and fourth
Resistance (23, 24, 29, 30) and first and second bypass
A power supply (25, 31) is provided, and one end of the first capacitor (C1) is connected to the first switch.
Is connected to one end of a switching element (Q1), and the first diode (D5) is connected to the first capacitor.
The other end of (C1) and the first switching element (Q1)
Of the first capacitor (C
1) has a polarity capable of flowing the discharge current, and the collector of the first transistor (20) is connected to the second transistor (20).
The first switching via the diode (22) of
It is connected to the control terminal of the device (Q1) and its emitter is
Note Connected to the other end of the first switching element (Q1), the second diode (22) and the first transistor.
The star (20) is of the first switching element (Q1).
The second transistor (21) has a polarity capable of biasing a drive signal, and the collector of the second transistor (21) is the first transistor.
Connected to the base of the transistor (20) of
Is connected to the other end of the first switching element (Q1).
The base of the first capacitor (C1)
Connected to the other end, the second transistor (21) is connected to the first capacitor.
The first bias power source (25) has a polarity that turns on when the capacitor (C1) is charged .
It is connected to the other end of the switching element (Q1), and the first resistor (23) is connected to the first bias power source (2).
5) The other end of the second transistor (21)
And a second resistor (24) connected to the first bias power supply (2
5) the other end and the base of the second transistor (21)
And one end of the second capacitor (C2) is connected to the second switch.
Is connected to one end of the switching element (Q2), and the third diode (D6) is connected to the second capacitor.
The other end of (C2) and the second switching element (Q2)
Of the second capacitor (C
2) has a polarity capable of flowing the discharge current, and the collector of the third transistor (26) is the third transistor (26).
The second switching via the diode (28) of
It is connected to the control terminal of the device (Q2) and its emitter is
The third diode (28) and the third transistor connected to the other end of the second switching element (Q2).
The star (26) is of the second switching element (Q2).
The fourth transistor (27) has a polarity capable of biasing a drive signal, and the collector of the fourth transistor (27) is the third transistor.
Connected to the base of the transistor (26) of
Is connected to the other end of the second switching element (Q2).
The base of the second capacitor (C2)
Connected to the other end, the fourth transistor (27) is connected to the second capacitor.
The second bias power source (31) has a polarity that turns on when the capacitor (C2) is discharged .
The third resistor (29) is connected to the other end of the switching element (Q2), and the third resistor (29) is connected to the second bias power source (3).
1) and the other end of the fourth transistor (27)
And a fourth resistor (30) connected to the second bias power supply (3
The other end of 1) and the base of the fourth transistor (27)
An inverter circuit device characterized by being connected between and . 5. Having first and second DC power supplies (2, 3) and first and second switching elements (Q1, Q2),
One end of the first power supply (2) is connected to one end of the first switching element (Q1), and the first power supply (2)
Of the second switching element (Q2) is connected to one end of the second power source (3), and the other end of the first switching element (Q1) is connected to one end of the second switching element (Q2). The other end of the power source (3) is connected to the second switching element (Q2
) Connected to the other end of the first and second power supplies (2,
A load circuit (7) is connected between the connection middle point of 3) and the connection middle point (8) of the first and second switching elements (Q1, Q2), and the first and second switching elements are connected. First and second drive signal supply circuits (14, 15) for alternately turning on / off the first and second switching elements (Q1, Q2) are connected to control terminals of (Q1, Q2). In the inverter circuit device, the capacitor (C) and the first and second diodes (D1, D
2) and the first and second transistors (16, 17)
Is provided, and the collector of the first transistor (16) is the first
Connected to the control terminal of the switching element (Q1) of
The emitter of is connected to one end of the capacitor (C),
Its base is other than that of the first switching element (Q1).
The first transistor (16) connected to the base of the base transistor.
The charging current of the capacitor (C)
The first diode (D1) has a polarity capable of
(16) emitter and the first switching element
The other end of (Q1) is connected between them and the capacitor is
(C) has a polarity that allows the discharge current to flow , and the collector of the second transistor (17) is the second transistor (17).
Connected to the control terminal of the switching element (Q2) of
The emitter of is connected to the other end of the capacitor (C),
Its base is other than that of the second switching element (Q2).
The second transistor (17) connected to the base of the base
The discharge current of the capacitor (C)
The second diode (D2) has a polarity capable of
And the other end of the second switching element (Q2)
And the charging current of the capacitor (C)
The first transistor (16) and the first diode having a polarity capable of flowing,
(D1) is the drive of the first switching element (Q1)
Connect in series with each other so that signals can be bypassed.
Is continued, the said second transistor (17) a second diode
The drive (D2) drives the second switching element (Q2).
In series with each other so that motion signals can be bypassed
Inverter circuit device characterized by being connected . And wherein the DC power supply (40), the transformer between the one end and the other end of the DC power supply (40)
The switch connected via the primary winding (44) of (43)
A quenching device (45), on-off control terminal of the switching element (45)
A drive circuit for supplying a drive signal, an output winding (46) of the transformer (43), and an output rectifying and smoothing circuit connected to the output winding (46)
(49) and a power conversion circuit device including: a capacitor (55), a diode (56), and a transistor.
(58) is provided, and one end of the capacitor (55) is provided with the switching element.
(45) is connected to one end, and the diode (56) is connected to the other end of the capacitor (55).
Connected between the end and the other end of the switching element (45)
And flowing the charging current of the capacitor (55)
And the collector of the transistor (58) is connected to the drive circuit.
It is connected to the transmission line of the signal indicating the drive, and its emitter is
Connection between the capacitor (55) and the diode (56)
Connected to a continuation point, the base of which is the other end of the power supply (40)
And the transistor (58) is connected between its base and emitter.
Through the discharge current of the capacitor (55).
The diode (56) and the transistor (58) having polarities
Biases the drive signal of the switching element (45)
A power conversion circuit device, wherein the power conversion circuit devices are connected in series so that they can be connected to each other . 7. A DC power supply (40) and a transformer between one end and the other end of the DC power supply (40).
A switch connected through the primary winding (44) of (43)
A quenching device (45), on-off control terminal of the switching element (45)
A drive circuit for supplying a drive signal, an output winding (46) of the transformer (43), and an output rectifying and smoothing circuit connected to the output winding (46)
And (49), in the power conversion circuit device equipped with a diode (56) and the first and second capacitor (55)
2 transistors (57, 58) and bias voltage source (+
Vcc) and a resistor (59) are provided, and one end of the capacitor (55) is connected to the switching element.
(45) is connected to one end, and the diode (56) is connected to the other end of the capacitor (55).
Connected between the end and the other end of the switching element (45)
And allows the charging current of the capacitor (C) to flow.
The first transistor (57) has an emitter polarity and
Connected to the control terminal of the switching element (45),
Is connected to the other end of the switching element (45).
Its base is connected to the bias voltage source (+ Vcc).
And a collector of the second transistor (58) connected to the first transistor.
Connected to the base of the transistor (57) of
The capacitor (55) and the diode (5
6) is connected to the connection point, and its base is the power source (4
0) connected to the other end of the first and second transistors (57, 58)
Has a polarity that turns on when the capacitor (55) is discharged
Power conversion circuit device characterized by there. 8. conversion capacitor dc power supply (1) (3
a) and first and second switching elements (Q1, Q2)
Has, connected one end of the previous SL power (1) is at one end of said first switching element (Q1), said first other end said second switching element (Q2 of the switching element (Q1) ) is connected to one end of the connected before Symbol supply the other end of (1) to the other end of said second switching element (Q2), 1 wherein the conversion capacitors (3a) of the output transformer
The second switching element via the secondary winding (7a)
(Q2) is connected in parallel, and the first and second switching elements (Q1, Q2) are alternately turned on and off at the control terminals of the first and second switching elements (Q1, Q2). First and second drive signal supply circuits (14,
In the modified half bridge type inverter circuit device to which 15) is connected, the first and second capacitors (C1, C2) and the first and second capacitors are connected .
Transistors (16, 17) and first and second diodes
(D1, D2) are provided, and one end of the first capacitor (C1) is connected to the first switch.
The first diode (D1) is connected to one end of a ching element (Q1), and the first diode (D1) is connected to the first capacitor.
The other end of (C1) and the other of the first switching element (Q1)
Is connected between the end and the first capacitor (C1)
The first transistor (16) has a polarity that allows a charging current to flow, and the collector of the first transistor (16) is the first transistor.
Connected to the control terminal of the switching element (Q1) of
The emitter includes the first capacitor (C1) and the first capacitor (C1).
Connected to the interconnection point with Iodo (D1) and its base
Is the connection of the first and second switching elements (Q1, Q2)
Connected to the midpoint ( 8), the first transistor (16) is connected to its base emitter.
Discharge current of the first capacitor (C1)
The first diode (D1) and the first transistor having a polarity capable of flowing
The capacitor (16) is located before the first capacitor (C) is discharged.
Bypasses the drive signal of the first switching element (Q1)
So that they are connected in series with each other , one end of the second capacitor (C2) is connected to the second switch.
The second diode (D2) is connected to one end of a ching element (Q2), and the second diode (D2) is connected to the second capacitor.
The other end of (C2) and the other of the second switching element (Q2)
Is connected between the end of the second capacitor (C2)
The second transistor (17) has a polarity that allows a charging current to flow, and the collector of the second transistor (17) is the second transistor.
Connected to the control terminal of the switching element (Q2) of
The emitter is the second capacitor (C2) and the second capacitor (C2).
Connected to the interconnection point with Iodo (D2) and its base
Is connected to the other end of the second switching element (Q2).
And the second transistor (17) has its base emitter.
The discharge current of the second capacitor (C)
The second diode (D2) and the second transistor having a polarity capable of flowing
The capacitor (17) is located before the second capacitor (C2) is discharged.
The drive signal for the second switching element (Q2) is bypassed.
Are connected in series with each other so that
An inverter circuit device characterized by the above . 9. A center of a primary winding (71) of the transformer (70), comprising a DC power source (1), first and second switching elements (Q1, Q2) and an output transformer (70). One end of the power source (1) is connected to the tap,
One end of the first switching element (Q1) is connected to one end of the secondary winding (71), and one end of the second switching element (Q2) is connected to the other end of the primary winding (71). , The first and second switching elements (Q1, Q2)
The other end of each of the first and second switching elements (Q1, Q2) is connected to the other end of the power source (1), respectively .
In an inverter circuit device to which first and second drive signal supply circuits (14, 15) for alternately turning on and off Q2) are connected, first and second capacitors (C1, C2) and a first capacitor And the second
Transistors (16, 17) and first and second diodes
(D1, D2) are provided, and one end of the first capacitor (C1) is connected to the first switch.
The first diode (D1) is connected to one end of a ching element (Q1), and the first diode (D1) is connected to the first capacitor.
The other end of (C1) and the other of the first switching element (Q1)
Is connected between the end and the first capacitor (C1)
Of the first transistor (16) has a polarity that allows the charging current of the first transistor (16) to flow.
Connected to the control terminal of the switching element (Q1) of
The emitter includes the first capacitor (C1) and the first capacitor (C1).
Connected to the interconnection point with Iodo (D1) and its base
Is the connection of the first and second switching elements (Q1, Q2)
The first transistor (16) is connected to the midpoint (8) and has its base-emitter
Through the discharge current of the first capacitor (C1)
The first diode (D1) and the first transistor having a polarity
(16) when the first capacitor (C1) is being discharged
The drive signal for the first switching element (Q1) is bypassed.
Connected in series with each other so that one end of the second capacitor (C2) is connected to the second switch.
The second diode (D2) is connected to one end of a ching element (Q2), and the second diode (D2) is connected to the second capacitor.
The other end of (C2) and the other of the second switching element (Q2)
Is connected between the end and the second capacitor (C2)
Has a polarity capable of flowing the charging current of the second transistor (17), and the collector of the second transistor (17) is the second transistor (17).
Connected to the control terminal of the switching element (Q2) of
The emitter is the second capacitor (C2) and the second capacitor (C2).
Connected to the interconnection point with Iodo (D2) and its base
Is the connection of the first and second switching elements (Q1, Q2)
The second transistor (17) is connected to its midpoint (8) and its base emitter is
The discharge current of the second capacitor (C2)
The second diode (D2) and the second transistor having a polarity capable of flowing
When the second capacitor (C2) is discharged,
The drive signal for the second switching element (Q2) is bypassed.
Connected in series with each other so that they can pass
Inverter circuit and wherein the that. 10. A first and a second DC power supply (2, 3) and a first and a second switching element (Q1, Q2), wherein one end of the first power supply (2) is the first One switching element (Q1) is connected to one end, the other end of the first power supply (2) is connected to one end of the second power supply (3), and the other end of the second power supply (3) is connected. Is the second switch
Is connected to one end of the ring element (Q2), said first end of the switching element (Q1) is connected to the other end of said second switching element (Q2), before Symbol first and second power supply ( A load circuit (7) is connected between the connection middle point of (2, 3) and the connection middle point (8) of the first and second switching elements (Q1, Q2) to connect the first and second The switching elements (Q1, Q2) have opposite conductivity types, and the control terminals of the first and second switching elements (Q1, Q2) have the first and second switching elements (Q1, Q2).
In the inverter circuit device to which the common drive signal supply terminal (13a) for alternately turning on and off) is connected, the first and second capacitors having opposite conductivity types to the capacitor (C) and
A second transistor (16, 17) is provided, and one end of the capacitor (C1) is connected to the first switching device.
The collector of the first transistor (16) is connected to one end of the element (Q1), and
Connected to the control terminal of the switching element ( Q1) of
The emitter is connected to the other end of the first capacitor (C1).
And its base is the first and second switching elements.
It is connected to the connection midpoint (8) of (Q1, Q2), and the collector of the second transistor (17) is the second transistor (17).
Connected to the control terminal of the switching element (Q2) of
The emitter is connected to the other end of the capacitor (C1),
Is based on the first and second switching elements (Q1, Q
2) is connected to the connection midpoint (8), and the first transistor (16) is connected to the capacitor.
(C) has a polarity that turns on during discharge, and
The transistor (17) is used when the capacitor (C) is being charged.
An inverter circuit device having a polarity that turns on . 11. A DC power supply (40) and a transformer between one end and the other end of the DC power supply (40).
A switch connected through the primary winding (44) of (43)
A quenching device (45), on-off control terminal of the switching element (45)
A drive circuit for supplying a drive signal, an output winding (46) of the transformer (43), and an output smoothing and smoothing circuit connected to the output winding (46)
In a power conversion circuit device including (49), a capacitor (55) and first and second diodes (5
6, 61) and one end of the capacitor (55) is the switching element.
(45) is connected to one end, and the first diode (56) is connected to the capacitor (5).
Between the other end of 5) and the other end of the switching element (45)
Connected between and charging current of the capacitor (55)
The second diode (61) has a polarity capable of flowing and one end of the second diode (61)
Connected to the control terminal of the switching element (45), the other end is
A capacitor (55) and the first diode (56)
The second diode (61) connected to the connection point of the capacitor (5
A power conversion circuit device having a polarity that turns on at the time of discharging 5) . 12. A first and a second DC power supply (2, 3) and a first and a second switching element (Q1, Q2) are provided, and one end of the first power supply (2) is the first Of the first switching element (Q1), the other end of the first power source (2) is connected to one end of the second power source (3), and the other end of the first switching element (Q1) Is connected to one end of the second switching element (Q2), the other end of the second power source (3) is connected to the other end of the second switching element (Q2), and the first and second A load circuit (7) is connected between a connection middle point of the power supplies (2, 3) of the first and second connection points (8) of the first and second switching elements (Q1, Q2), and The first and second switching elements (Q1, Q2) are connected to the control terminals of the second switching elements (Q1, Q2). First and second drive signal supplying circuit for turning on and off the (14, 15)
In the inverter circuit device to which is connected the capacitor (C) and the first, second, third, fourth, fifth and
Provided with a sixth diode (D1, D2, D3, D4, D6)
Is, one end of the capacitor (C) said first diode - de (D1)
Through the first and second switching elements (Q1,
It is connected to the connection midpoint (8) of Q2) and is connected to the other end of the capacitor (C) and the second diode.
Of the first switching element (Q1) via (D2)
The third diode (D3) is connected to the other end, and the third diode (D3) is connected to the first switch.
Control terminal of the switching element (Q1) and one end of the capacitor (C)
And the fourth diode (D4) is connected between
Control terminal of element (Q2) and the other end of the capacitor (C)
And a fifth diode (D5) connected to the first and third dies.
The sixth diode (D6) is connected in reverse parallel to the series circuit of the diodes (D1, D3) , and the sixth diode (D6) is connected to the second and fourth diodes.
Reverse parallel to the series circuit of the ions (D2, D4)
And the first and third diodes (D1, D3) are connected to the first
Bypasses the drive signal of the switching element (Q1) of
And the second and fourth diodes (D2, D4) have the polarity that enables the second
Bypass the drive signal of the switching element (Q2).
Invar characterized by having a polarity capable of
Circuit device. 13. A first and a second DC power supply (2, 3) and a first and a second switching element (Q1, Q2), wherein one end of the first power supply (2) is the first Of the first switching element (Q1), the other end of the first power source (2) is connected to one end of the second power source (3), and the other end of the first switching element (Q1) Is connected to one end of the second switching element (Q2), the other end of the second power source (3) is connected to the other end of the second switching element (Q2), and the first and second A load circuit (7) is connected between a connection middle point of the power supplies (2, 3) of the first and second connection points (8) of the first and second switching elements (Q1, Q2), and The first and second switching elements (Q1, Q2) are connected to the control terminals of the second switching elements (Q1, Q2). First and second drive signal supplying circuit for turning on and off the (14, 15)
In the inverter circuit device to which is connected the capacitor (C) and the first, second, third, fourth, fifth and
Provided with a sixth diode (D1, D2, D3, D4, D6)
Is, one end of the capacitor (C) is the first diode - de
(D1) through the first and second switching elements
It is connected to the connection midpoint (8) of (Q1, Q2) and the other end of the capacitor (C) is connected to the second diode.
Of the first switching element (Q1) via (D2)
The third diode (D3) is connected to the other end, and the third diode (D3) is connected to the first switch.
Control terminal of the switching element (Q1) and one end of the capacitor (C)
And the fourth diode (D4) is connected between
Control terminal of element (Q2) and the other end of the capacitor (C)
And a fifth diode (D5) connected to the first diode.
( 6) is connected in reverse parallel to (D1), and the sixth diode (D6) is connected to the second diode.
(D2) is connected in reverse parallel and the first and third diodes (D1, D3) are connected to the first diode.
Bypass drive signal of switching element ( Q1) of
And the second and fourth diodes (D2, D4) have the polarity that enables the second
Bypass the drive signal of the switching element (Q2).
Invar characterized by having a polarity capable of
Circuit device.