JP2018182783A - Power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily configure a power supply device according to a desired output voltage. A power supply device includes a plurality of power supply circuit units 1 connected in series, and gate signals having different duty ratios can be input to each power supply circuit unit 1. Each power supply circuit unit 1 has a connection state in which the battery B is connected to the positive terminal and the negative terminal to output power from the battery, and the battery is separated from the positive terminal or the negative terminal to connect the positive terminal and the negative terminal. A short-circuited through state includes a battery circuit module 10 that is switched by a gate signal, and a plurality of delay circuits 13 that are provided corresponding to each battery circuit module 10 and transmit the gate signal with a delay of a certain period of time. It includes a control circuit 11 that supplies a gate signal to the battery circuit module 10 by shifting it by a fixed period of time. [Selection diagram] Fig. 6

Description

  The present invention relates to a power supply device provided with a plurality of battery circuit modules.

  Various power supply devices are known. For example, in a power supply device used to drive a traveling motor in a hybrid vehicle or an electric vehicle, a battery voltage is boosted by a boost converter and input to an inverter.

  In particular, Patent Document 1 discloses a DC / DC converter that converts DC voltage from a battery such as a battery by DC / DC conversion of a switching element and outputs the DC voltage to a traveling motor, and loss characteristics of the DC / DC converter. A power supply apparatus is described which includes frequency setting means for setting a switching frequency of a switching element, and control means for switching control of the switching element based on the set frequency. According to this power supply device, the DC / DC converter can be efficiently driven by setting the switching frequency that reduces the loss of the DC / DC converter.

JP 2003-116280 A

  In the power supply device described in Patent Document 1, a boosting reactor used for a switching element or a DC / DC converter is designed in accordance with the required current capacity and output voltage. Moreover, the housing which accommodates it is also designed according to the size of the parts to be used. Therefore, it is necessary to design the switching element, the boost reactor, peripheral parts related to these, and the like each time based on the required current capacity and output voltage.

  That is, the power supply device needs to be newly designed each time based on the required specifications (the required current capacity and output voltage), and the versatility is low. In addition, a DC / DC converter for boosting is required.

  The present invention is a power supply device including a plurality of power supply circuit units connected in series, to which gate signals having different duty ratios can be input to each power supply circuit unit, wherein each power supply circuit unit has a battery on the positive side. The battery is connected by the gate signal between the positive and negative terminals connected to output power from the battery, and the through state where the battery is disconnected from the positive or negative terminal and the positive and negative terminals are shorted. A plurality of battery circuit module groups in which a plurality of circuit modules are connected in series via positive and negative terminals, and a plurality of delay circuits provided corresponding to the respective battery circuit modules and delaying and transmitting gate signals for a predetermined time And a control circuit for supplying a gate signal to each battery circuit module with a predetermined time offset.

  Further, it is preferable to have an operation mode in which the duty ratio of one of the gate signals input to the plurality of power supply circuit units is set to 100%.

  In addition, it is preferable to have an operation mode in which the duty ratio and the period of the gate signal input to the plurality of power supply circuit units are equal.

  According to the present invention, the configuration is simple, a desired output voltage can be easily coped with, and a power supply device with high versatility can be obtained. And various operation modes become possible by returning the duty ratio of the gate signal supplied to a power supply circuit block.

It is a schematic block diagram of the power supply circuit unit in an embodiment. It is a schematic block diagram of a battery circuit module. It is a time chart explaining operation of a battery circuit module. It is operation | movement explanatory drawing of a battery circuit module, (a) shows the state which 1st switching element turned ON, 2nd switching element turned off, (b) 1st switching element is OFF, 2nd switching Indicates the state in which the element is turned on. It is a time chart explaining operation of the whole power supply circuit unit. It is a figure which shows the structure of the power supply device which provided multiple power supply circuit units. It is a figure explaining operation of the power supply device which provided multiple power supply circuit units. It is a schematic block diagram explaining the modification of a battery circuit module. It is a figure explaining the example of the supply path of the gate signal to a battery circuit module.

"Configuration of power supply circuit unit"
The power supply device in the embodiment includes a plurality of power supply circuit units 1. First, the configuration of the power supply circuit unit 1 will be described. FIG. 1 shows a block diagram of the power supply circuit unit 1. As shown in FIG. 1, the power supply circuit unit 1 has a plurality of battery circuit modules 10 (10a, 10b, 10c,..., 10e) and gate circuits for the battery circuit modules 10a, 10b, 10c,. The control circuit 11 outputs a signal to turn on and off the battery circuit modules 10a, 10b, 10c, ..., 10e.

  The battery circuit modules 10a, 10b, 10c,..., 10e are connected in series by sequentially connecting their positive terminals + OT to the negative terminal -OT, and constitute the battery circuit module group 100. . The positive terminal + OT of the battery circuit module 10a on the most upstream side is connected to the positive output terminal + OUT of the battery circuit module group 100, and the negative terminal -OT of the battery circuit module 10e on the most downstream side is the battery circuit module group 100 Are connected to the negative side output terminal -OUT.

  The battery circuit module 10 has a battery B in which a plurality of battery cells are connected in series. The positive electrode of the battery B is connected to the positive terminal + OT via the choke coil L and the second switching element S2, and the negative electrode of the battery B is connected to the negative terminal -OT. A first switching element S1 is disposed between the positive terminal + OT and the negative terminal -OT. Further, a capacitor C is disposed between the connection point of the choke coil L and the second switching element S2 and the cathode of the battery B.

  Therefore, when the second switching element S2 is turned on and the first switching element S1 is turned off, both the battery B and the capacitor are connected in parallel between the positive terminal + OT and the negative terminal -OT. It becomes (connection state). On the other hand, when the second switching element S2 is turned off and the first switching element S1 is turned on, the battery B is cut off and the positive terminal + OT and the negative terminal -OT are shorted. It will be in the state. The RLC filter is formed by the battery B, the choke coil L and the capacitor C to level the current, thereby suppressing the deterioration of the battery B.

  The first switching element S1 and the second switching element S2 are MOS-FETs as field effect transistors. The first switching element S1 and the second switching element S2 are switched by a gate signal from the control circuit 11. Note that switching elements other than MOS-FETs can be used as long as the elements can perform switching operation.

  A control circuit 11 is connected to the battery circuit module 10, and a gate signal output from the control circuit 11 is supplied to each battery circuit module 10. The gate signal turns on one of the first switching element S1 and the second switching element S2 in each of the battery circuit modules 10 and turns off the other.

  The control circuit 11 has a controller 12, and the controller 12 outputs a gate signal to be supplied to the most upstream battery circuit module 10a. The control circuit 11 has delay circuits 13 (13a, 13b, 13c,..., 13e) corresponding to the respective battery circuit modules 10a, 10b, 10c,. The gate signals delayed by 13a, 13b, 13c, ... 13e are supplied to the corresponding battery circuit modules 10b, 10c, ..., 10e.

  Therefore, the switching timings of the first switching element S1 and the second switching element S2 in each of the battery circuit modules 10a, 10b, 10c, ..., 10e are different from those of the delay circuits 13a, 13b, 13c, ... Each delay time will be delayed.

  The gate signal output from the delay circuit 13e on the most downstream side is input to the controller 12. Therefore, the controller 12 can grasp the total delay time in which the gate signal output from the controller 12 is delayed by all the delay circuits 13. Based on this, the controller 12 can output the next gate signal. Also, the sum of delay times can be easily made to coincide with the period of the gate signal.

"Operation of battery circuit module 10"
Next, the operation of the battery circuit module 10 will be described with reference to FIGS. 2 shows a schematic configuration diagram of the battery circuit module 10, and FIG. 3 shows a time chart regarding the operation of the battery circuit module 10. As shown in FIG. Further, in FIG. 3, the code D1 represents a rectangular wave of the gate signal for driving the battery circuit module 10a, the code D2 represents a rectangular wave indicating the ON / OFF state of the first switching element S1, and the code D3 represents a second wave. The symbol D4 indicates the characteristics of the voltage V _mod output from the battery circuit module 10a. The rectangular wave indicates the ON / OFF state of the switching element S2.

  In the initial state of the battery circuit module 10, that is, in the state where the gate signal is not output (the gate signal is OFF), the first switching element S1 is in the ON state, and the second switching element S2 is in the OFF state. There is. When a gate signal is input from the control circuit 11 to the battery circuit module 10a, the battery circuit module 10 performs switching operation by PWM control. This switching operation is performed by alternately turning on and off the first switching element S1 and the second switching element S2.

  As shown by symbol D1 in FIG. 3, when the gate signal is output from the control circuit 11, the first switching element S1 and the second switching element S2 of the battery circuit module 10a are driven according to the gate signal. Ru. The first switching element S1 switches from the ON state to the OFF state in response to the rise of the gate signal. In addition, the first switching element S1 switches from the OFF state to the ON state with a slight delay (dead time dt) from the fall of the gate signal (see D2).

  On the other hand, the second switching element S2 switches from the OFF state to the ON state with a slight time delay (dead time dt) from the rise of the gate signal. The second switching element S2 switches from the ON state to the OFF state at the same time as the fall of the gate signal (see D3). Thus, the first switching element S1 and the second switching element S2 alternately turn on and off.

  The first switching element S1 operates with a slight delay (dead time dt) when the gate signal falls and the second switching element S2 operates with a slight delay (dead time dt) when the gate signal rises. The delayed operation is to prevent the first switching element S1 and the second switching element S2 from operating at the same time. That is, the first switching element S1 and the second switching element S2 are prevented from being simultaneously turned on and shorting. The dead time dt delaying this operation is set to, for example, 100 ns, but can be set as appropriate. During the dead time dt, the diode is returned, and the state is the same as when the switching element in parallel with the returned diode is turned on.

  By this operation, the battery circuit module 10 is turned off when the gate signal is OFF (that is, when the first switching element S1 is ON and the second switching element S2 is OFF), as indicated by symbol D4 in FIG. The capacitor C is disconnected from the positive terminal + OT of the battery circuit module 10a, and no voltage is output to the positive terminal + OT. This state is shown in FIG. 4 (a). As shown to Fig.4 (a), the battery B (capacitor | condenser C) of the battery circuit module 10 is bypassed (through state).

In addition, when the gate signal is ON (that is, the first switching element S1 is OFF and the second switching element S2 is ON), the capacitor C is connected to the positive terminal + OT of the battery circuit module 10 and the positive terminal + OT Voltage is output. This state is shown in FIG. 4 (b). As shown in FIG. 4B, the voltage V _mod is output to the positive terminal + OT via the capacitor C in the battery circuit module 10.

  Here, the duty ratio of the gate signal is determined by the output voltage request to the power supply circuit unit 1, and a gate signal of the determined duty ratio is generated. The output voltage demand is a demand from the system side using power from the power supply circuit unit 1.

"Operation of control circuit 11"
Returning to FIG. 1, control of the power supply circuit unit 1 by the control circuit 11 will be described. The control circuit 11 controls the entire battery circuit module group 100. That is, the operation of the battery circuit modules 10a, 10b, 10c,..., 10e is controlled to control the output voltage as the power supply circuit unit 1.

  As described above, the control circuit 11 delays the controller 12 which outputs the gate signal of the rectangular wave and the gate signal output from the controller 12 to the battery circuit modules 10a, 10b, 10c, ..., 10e. There are provided delay circuits 13a, 13b, 13c,..., 13e which sequentially output.

  The controller 12 supplies a gate signal to the most upstream battery circuit module 10a among the battery circuit modules 10a, 10b, 10c,..., 10e connected in series in the battery circuit module group 100.

  The delay circuits 13a, 13b, 13c,..., 13e are provided corresponding to the battery circuit modules 10a, 10b, 10c,. The delay circuit 13a delays the gate signal from the controller 12 for a predetermined time, and outputs the gate signal to the adjacent battery circuit module 10b and outputs the gate signal to the delay circuit 13b. As a result, the gate signal output from the controller 12 is sequentially delayed and supplied to the battery circuit modules 10a, 10b, 10c, ..., 10e.

  The delay circuits 13a, 13b, 13c,..., 13e are included in the control circuit 11 as the electrical circuit configuration, but the battery circuit modules 10a, 10b, 10c,. · · Preferably integrated with 10e. In FIG. 1, for example, as indicated by a dashed-dotted line M, the delay circuit 13b and the battery circuit module 10b may be integrated (moduleed).

  In FIG. 1, when a gate signal is output from the controller 12 to the battery circuit module 10a on the most upstream side, the battery circuit module 10a is driven and, as shown in FIGS. 4 (a) and 4 (b), in the battery circuit module 10a. The voltage is output to the positive terminal + OT. Also, the gate signal from the controller 12 is input to the delay circuit 13a, delayed for a predetermined time, and then input to the adjacent battery circuit module 10b. The battery circuit module 10b is driven by the gate signal.

  On the other hand, the gate signal from the delay circuit 13a is also input to the delay circuit 13b, delayed for a fixed time as in the delay circuit 13a, and then input to the adjacent battery circuit module 10c. Similarly, the gate signals are similarly delayed and input to the downstream battery circuit modules. Then, the battery circuit modules 10a, 10b, 10c, ..., 10e are sequentially driven, and the voltages of the battery circuit modules 10a, 10b, 10c, ..., 10e are sequentially output to the respective positive terminals + OT. .

  A state in which the battery circuit modules 10a, 10b, 10c,..., 10e are sequentially driven is shown in FIG. As shown in FIG. 5, in accordance with the gate signal, the battery circuit modules 10a, 10b, 10c,..., 10e are driven one after another from the upstream side to the downstream side with a fixed delay time. In FIG. 5, reference character E1 indicates that the first switching element S1 of the battery circuit modules 10a, 10b, 10c,..., 10e is OFF and the second switching element S2 is ON, so that the battery circuit modules 10a, 10b, 10c show states (connection states) in which a voltage is outputted from the positive terminal + OT. Further, the code E2 indicates that the first switching element S1 of the battery circuit modules 10a, 10b, 10c,..., 10e is ON and the second switching element S2 is OFF, and the battery circuit modules 10a, 10b, 10c, .., 10 e indicates a state (through state) in which no voltage is output from the positive terminal + OT. Thus, the battery circuit modules 10a, 10b, 10c,..., 10e are sequentially driven with a fixed delay time.

  The setting of the gate signal and the delay time of the gate signal will be described with reference to FIG. The period F of the gate signal is set by summing up the delay times of the battery circuit modules 10a, 10b, 10c,. Therefore, if the delay time is set long, the frequency of the gate signal becomes low. Conversely, when the delay time is set short, the frequency of the gate signal becomes high. Further, the delay time for delaying the gate signal can be appropriately set in accordance with the specification required for the power supply circuit unit 1.

  The ON ratio G1 in the cycle F of the gate signal, that is, the ratio of the ON time of the cycle F is calculated as follows: output voltage of the power supply circuit unit 1 / total voltage of the battery circuit modules 10a, 10b, 10c,. It can be calculated by: battery circuit module battery voltage × number of battery circuit modules). That is, the on-time ratio G1 = power supply device output voltage / (battery circuit module battery voltage × number of battery circuit modules). Strictly speaking, since the on-time ratio deviates by the dead time dt, correction of the on-time ratio is performed by feedback or feedforward as generally performed in a chopper circuit.

  The total voltage of the battery circuit modules 10a, 10b, 10c,..., 10e can be represented by the battery circuit module battery voltage × the number of battery circuit modules in the connected state, as described above. If the output voltage of the power supply circuit unit 1 is a value divisible by the battery voltage of one battery circuit module 10, another battery circuit module is connected from the connection at the moment when the battery circuit module 10 switches from passing (through state) to connection. There is no change in the overall output voltage of the battery circuit module group 100 because it is switched to the passing (through state).

  However, if the output voltage of the power supply circuit unit 1 is an indivisible value by the battery voltage of the battery circuit module 10a, the output voltage of the power supply circuit unit 1 and the battery circuit modules 10a, 10b, 10c,. It does not match the total voltage. In other words, the output voltage of the power supply circuit unit 1 (the entire output voltage of the battery circuit module group 100) fluctuates. However, the fluctuation amplitude at this time is a voltage of one battery circuit module, and the fluctuation period is the cycle F of the gate signal / the number of battery circuit modules. Here, since dozens of battery circuit modules are connected in series, the parasitic inductance of the entire battery circuit module has a large value, and this voltage fluctuation is filtered and, as a result, the output of power supply circuit unit 1 You can get the voltage.

"Concrete example"
Next, specific examples will be described. In FIG. 5, for example, the desired output voltage as the power supply circuit unit 1 is 400 V, the battery voltage of the battery circuit module 10 is 15 V, the battery circuit modules 10a, 10b, 10c,. Is 200 ns. This case corresponds to the case where the output voltage (400 V) of the power supply circuit unit 1 can not be divided by the battery voltage (15 V) of the battery circuit module 10.

  Based on these numerical values, the period F of the gate signal is calculated by delay time × the number of battery circuit modules, so that 200 ns × 40 = 8 μs, and the gate signal becomes a square wave equivalent to 125 kHz. Further, since the on-time ratio G1 of the gate signal is calculated by: power supply device output voltage / (battery circuit module battery voltage × number of battery circuit modules), the on-time ratio G1 is 400 V / (15 V × 40) ≒ 0 It becomes .67.

  When the battery circuit modules 10a, 10b, 10c,..., 10e are sequentially driven based on these numerical values, rectangular wave-like output characteristics indicated by a symbol H1 in FIG. 5 can be obtained as the power supply circuit unit 1. This output characteristic is a voltage output characteristic that fluctuates between 390 V and 405 V. That is, the output characteristic fluctuates in a cycle calculated by the cycle F of the gate signal / the number of battery circuit modules, and the output characteristic fluctuates in 8 μs / 40 = 200 ns (equivalent to 5 MHz). This variation is filtered by the parasitic inductance due to the wiring of the battery circuit modules 10a, 10b, 10c, ..., 10e, so that a voltage of 400 V is output as the power supply circuit unit 1 as indicated by the symbol H2. .

Then, since a current flows in the capacitor C of the battery circuit module 10a on the most upstream side in the connection state, the capacitor current waveform becomes a rectangular wave as indicated by a symbol J1 in FIG.
The battery B and the capacitor C form an RLC filter, so the filtered and leveled current is output to the power supply circuit unit 1 (see the reference J2 in FIG. 5).

  Thus, the current waveforms are the same in all the battery circuit modules 10a, 10b, 10c,..., 10e, and the current from all the battery circuit modules 10a, 10b, 10c,. Can be output.

"Power supply configuration"
The structure of the power supply device which concerns on FIG. 6 at embodiment is shown. As described above, the power supply device includes the plurality of power supply circuit units 1. In the figure, only two power supply circuit units 1 are shown, and the positive terminal + OT of the most upstream power supply circuit unit 1 is the positive output terminal + OUT of the power supply device. Further, the negative side terminal -OT of the power supply circuit unit 1 on the most downstream side becomes the negative side output terminal -OUT of the power supply circuit unit 1.

  And a power supply device has general control circuit 200 which controls the whole operation. The controller 12 of each power supply circuit unit 1 is connected to the general control circuit 200, and a gate control signal is supplied thereto. Each controller 12 controls the output of the gate signal based on the gate control signal from the general control circuit 200. That is, it controls the output timing and duty ratio of the gate signal to be output according to the received gate control signal. Therefore, the general control circuit 200 can comprehensively control the operation of each power supply circuit unit 1. The gate control signal is preferably a gate signal that is set to a predetermined duty ratio and output at a predetermined timing.

"Power supply operation"
The operation in the present embodiment will be described based on FIG. In this example, four power supply circuit units 1 (units A to D) are provided. Then, there are two operation modes: (i) non-PWM control mode; and (ii) PWM control mode.

<Non-PWM control mode>
As described above, in the present embodiment, the duty ratio can be set for each power supply circuit unit 1 based on the gate control signal from the general control circuit 200. For example, assuming that units A and B have a duty ratio of 100% and units C and D have a duty ratio of 0%, all battery circuit module groups 100 included in units A and B are connected in series as shown at the left end of the lower diagram in FIG. Voltage is obtained as an output. In this operation mode, only discrete voltages can be output, but no switching loss occurs because PWM control is not performed.

<PWM control mode>
In FIG. 6, if each power supply circuit unit 1 connects not only the battery output (high power system) but also the delay circuit 13 of the control circuit 11 in series, the configuration is exactly the same as that of the circuit of FIG. That is, four power supply circuit units 1 operate as one power supply circuit unit 1.

  In this case, the integrated control circuit 200 generates gate signals to be input when the delay circuits are connected in series, supplies them to the respective power supply circuit units 1, and the battery on the most upstream side at the timing received by the controller 12 It may be input to the circuit module 10 and the delay circuit 13. The controller 12 may generate an appropriate gate signal in response to the gate control signal from the general control circuit 200.

  Specifically, in each power supply circuit unit 1, gate signals having the same duty ratio and the same frequency (period) are generated. However, it is necessary to give each gate signal a time difference (phase difference) depending on the total delay time of each unit. For example, when imitating the operation of propagating gate signals in the order of units A → B → C → D, the time difference between the gate signals of units A and B is made equal to the total delay time of unit A. The time difference between the gate signals of units B and C is made equal to the total delay time of unit B, and so on. Then, by making the total delay time in units A to D coincide with the cycle of the gate signal, it is possible to set the output voltage of the power supply device according to the duty ratio.

  As a simple example, in the 4-unit configuration as shown in FIG. 7, when the total delay time of each power supply circuit unit 1 is the same, at the beginning of each power supply circuit unit 1, a time difference of 1⁄4 of the total delay time That is, it is sufficient to give a phase difference of 90 degrees. According to this operation, an arbitrary voltage can be output but switching loss occurs.

<Mode switching>
FIG. 7 shows an example of the sequence of switching the module group to which the duty ratio 100% command is given in the non-PWM control mode. That is, when switching from a state in which units A and B are fully connected to a state in which only unit C is fully connected, the output voltage suddenly becomes 1⁄2 if this is instantaneously performed. Therefore, inrush current may flow from a capacitive component (such as a capacitor) connected to a load receiving power supply from the power supply device, and the power supply device may be damaged.

  For this purpose, the PWM control mode is inserted between the two states of the non-PWM control mode, where the output voltage is gradually changed. That is, in a state in which units A and B are fully connected, the duty ratio of units A to D is 100, 100, 0, 0. However, with this as the PWM control mode, the duty ratio of units A to D is 50%. Set In this case, it is necessary to operate as one power supply circuit unit 1 as a whole. For example, the phase of the gate signal (the phase of the gate signal input to the most upstream battery circuit module 10) is 0 for each unit. 90, 180, 270 degrees. The order of the phases of the gate signals supplied to each unit may be changed. For example, even if a gate signal having a phase difference of 180, 0, 270, 90 degrees from the top is given, the output voltage is the same.

  Then, after gradually reducing the duty ratio of the gate signal to 25%, the duty ratio of one unit (unit C in this example) is 100%, and the duty ratios of the other units are set as a non-PWM control mode. It will be 0%. There is no change in the output voltage at this mode switching, and there is no problem in switching.

  Thus, while using the non-PWM control mode with small switching loss, by interposing the PWM control mode at the time of switching thereof, it is possible to change the output voltage appropriately. The state of the non-PWM control mode is preferably continued for several seconds or more, and the transient PWM control mode is preferably about several milliseconds.

"Effect of the embodiment"
As described above, when driving the battery circuit module group 100, the gate signal output to the most upstream battery circuit module 10a is delayed for a fixed time and output to the downstream battery circuit module 10b, and Since this gate signal is delayed for a predetermined time and sequentially transmitted to the battery circuit modules on the downstream side, the battery circuit modules 10a, 10b, 10c,..., 10e are sequentially voltage-connected during the connection state while being delayed for a predetermined time. Output each Then, by summing these voltages, the voltage as the power supply circuit unit 1 is output, and a desired voltage can be obtained. Therefore, no booster circuit is required, the configuration of the power supply circuit unit 1 can be simplified, and miniaturization and cost reduction can be achieved. In addition, since the configuration is simplified, the portion where the loss occurs is reduced and the boosting efficiency is improved. Furthermore, since voltages are output substantially equally from the plurality of battery circuit modules 10a, 10b, 10c,... 10e, the drive does not concentrate on a specific battery circuit module, and the inside of the power supply circuit unit 1 Resistance loss can be reduced.

  Further, by adjusting the ON ratio G1, a desired voltage can be easily coped with, and the versatility as the power supply circuit unit 1 can be improved. In particular, even if a battery circuit module is generated which is difficult to use due to a failure occurring in the battery circuit modules 10a, 10b, 10c, ..., 10e, the battery circuit module is excluded by fixing the failed battery circuit module in a through state. Then, the desired voltage can be obtained by resetting the cycle F of the gate signal, the on-time ratio G1, and the delay time using a normal battery circuit module. That is, even if a failure occurs in the battery circuit modules 10a, 10b, 10c,..., 10e, output of a desired voltage can be continued.

  Furthermore, by setting the delay time for delaying the gate signal to be long, the frequency of the gate signal becomes a low frequency, so the switching frequency of the first switching element S1 and the second switching element S2 also becomes low, and the switching loss The power conversion efficiency can be improved. On the contrary, by shortening the delay time for delaying the gate signal, the frequency of the gate signal becomes high frequency, the frequency of the voltage fluctuation becomes high, filtering becomes easy, and a stable voltage can be obtained. In addition, it becomes easy to equalize the current fluctuation by the RLC filter. Thus, the power supply circuit unit 1 can be provided according to the required specifications and performance by adjusting the delay time for delaying the gate signal.

  In the present embodiment, all connection / all through (non-PWM mode) can be selected for each power supply circuit unit 1. Thus, the output voltage can be adjusted without PWM control, and no switching loss occurs. In this non-PWM mode, the voltage that can be output is discrete. By utilizing the PWM mode at the time of switching, it is possible to gradually change the output voltage, and it is possible to suppress the generation of inrush current caused by the rapid change of the output voltage.

"Modification"
Next, a modification of the configuration of the battery circuit module 10 will be described. As shown in FIG. 8, as the configuration of the battery circuit module 10, the arrangement positions (connection positions) of the choke coil L and the battery B of the battery circuit module 10 shown in FIG. 1 may be interchanged. In addition, the second switching element S2 may be disposed on the opposite side of the positive terminal + OT to the first switching element S1. That is, if it is possible to output the voltage of the battery B (capacitor C) to the positive terminal + OT by the switching operation of the first switching element S1 and the second switching element S2, each element in the battery circuit module 10, an electrical component The arrangement of can be changed as appropriate.

  When the voltage output characteristic of battery B is excellent, that is, the power supply circuit matches the capacitor current, and there is no problem in the power supply circuit even if the output waveform becomes a rectangular wave, the RLC filter may be omitted. Good. In addition, although the parasitic inductance by the wiring of the battery circuit modules 10a, 10b, 10c, ..., 10e was used, instead of utilizing the parasitic inductance by the wiring, in order to secure a necessary inductance value, It may be implemented.

  Furthermore, in the above embodiment, as shown in FIG. 9A, the gate signal from the controller 12 is output to the battery circuit module 10 before being output to the delay circuit 13. However, FIG. The gate signal may be output to the battery circuit module 10 after being delayed by the delay circuit 13 as shown in FIG. In this case, the delayed gate signal output from the delay circuit 13 is output to the battery circuit module 10a and the delay circuit 13b. The same control is performed in the delay circuits 13b, 13c,. Also by this control, the battery circuit modules 10a, 10b, 10c,..., 10e can be sequentially driven while being delayed for a predetermined time, and the controller 12 grasps the total delay time to start the next gate signal. It can be output.

DESCRIPTION OF SYMBOLS 1 Power supply circuit unit, 10 (10a, 10b, 10c, ..., 10e) Battery circuit module, 11 control circuit, 12 controller, 13 (13a, 13b, 13c, ..., 13e) Delay circuit, 100 battery circuit Module group, 200 general control circuit, B battery, C capacitor, L choke coil, + OT positive side terminal,-OT negative side terminal, S1 first switching element, S2 second switching element.

Claims (3)

A power supply device including a plurality of power supply circuit units connected in series, to which gate signals having different duty ratios can be input to each power supply circuit unit,
Each power supply circuit unit is
Connect the battery to the positive terminal and the negative terminal and output the power from the battery, and the through state that disconnects the battery from the positive terminal or negative terminal and shorts the positive terminal and the negative terminal. A battery circuit module group in which a plurality of battery circuit modules switched by a signal are connected in series via a positive terminal and a negative terminal;
A control circuit provided corresponding to each battery circuit module, including a plurality of delay circuits delaying and transmitting the gate signal for each fixed time, and supplying the gate signal to each battery circuit module while shifting for each fixed time ,
including,
Power supply. The power supply device according to claim 1,
Among the gate signals input to the plurality of power supply circuit units, it has an operation mode in which the duty ratio of one of the gate signals is set to 100%.
Power supply. The power supply device according to claim 1,
It has an operation mode in which the duty ratio and period of gate signals input to a plurality of power supply circuit units are equal,
Power supply.