CN111181390A - Circuit equalizer and unmanned aerial vehicle - Google Patents
Circuit equalizer and unmanned aerial vehicle Download PDFInfo
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- CN111181390A CN111181390A CN201811348080.4A CN201811348080A CN111181390A CN 111181390 A CN111181390 A CN 111181390A CN 201811348080 A CN201811348080 A CN 201811348080A CN 111181390 A CN111181390 A CN 111181390A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
Abstract
The invention provides a circuit equalizer, which comprises a control module, a power module and a control module, wherein the gates of an IGBT tube Q1 and an IGBT tube Q2 are connected with the control module, the second end of the IGBT tube Q1 is connected with the first end of the IGBT tube Q2, the power module is connected with the second end of the IGBT tube Q1, and the second end of the IGBT tube Q2 is grounded; a capacitor C25 and a load A are connected between the first end and the second end of the IGBT tube Q1 in parallel; a capacitor C26 and a load B are connected between the first end and the second end of the IGBT tube Q2 in parallel; the control module outputs a PWM A signal and a PWM B signal which respectively control a grid of an IGBT tube Q1 and a grid of an IGBT tube Q2, the PWM A signal and the PWM B signal control the voltage division ratio of the power module on a load A and a load B actually, and the waveforms of the PWM A signal and the PWM B signal are complementary so that the IGBT tube Q1 and the IGBT tube Q2 are conducted alternately. The invention also provides the unmanned aerial vehicle comprising the circuit equalizer. The circuit equalizer and the unmanned aerial vehicle can ensure that loads connected in series can work stably and safely, and the condition that the loads do not work or are damaged due to the fact that voltage is completely loaded on a certain load is avoided.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of electronic circuits, in particular to a circuit equalizer and an unmanned aerial vehicle.
[ background of the invention ]
In circuit design, a load is usually connected in series, and as shown in fig. 1, a load a and a load B are connected in series as an example. The power supply module 91 supplies power to the load a and the load B connected in series. When the load a and the load B are pure resistive loads, the voltage at the point P is one-half of the voltage supplied by the power module 91. In the case of power supply by the power supply module 91, both the load a and the load B can operate normally. However, when the loads a and B are non-pure resistive loads, such as inductive loads or capacitive loads, the loads a and B connected in series cannot operate simultaneously, and the voltage supplied by the power module 91 is fully applied to the loads a or B, which may also cause damage to the loads a or B.
[ summary of the invention ]
In order to overcome the technical problems mentioned in the prior art, the invention provides a circuit equalizer and an unmanned aerial vehicle.
In order to solve the technical problem, the circuit equalizer is provided for enabling the voltage distributed by a power supply module on a series load A and a load B to tend to a preset voltage division ratio, and comprises a control module, an IGBT tube Q1, an IGBT tube Q2, a capacitor C25, a capacitor C26 and a power supply module, wherein each of the IGBT tube Q1 and the IGBT tube Q2 is provided with a grid, a first end and a second end, the grids of the IGBT tube Q1 and the IGBT tube Q2 are connected with the control module, the second end of the IGBT tube Q1 is connected with the first end of the IGBT tube Q2, the power supply module is connected with the second end of the IGBT tube Q1, and the second end of the IGBT tube Q2 is grounded; a capacitor C25 and a load A are connected between the first end and the second end of the IGBT tube Q1 in parallel; a capacitor C26 and a load B are connected between the first end and the second end of the IGBT tube Q2 in parallel; the control module outputs a PWM A signal and a PWM B signal which respectively control a grid of an IGBT tube Q1 and a grid of an IGBT tube Q2, the PWM A signal and the PWM B signal control the voltage division ratio of the power module on a load A and a load B actually, and the waveforms of the PWM A signal and the PWM B signal are complementary so that the IGBT tube Q1 and the IGBT tube Q2 are conducted alternately.
Preferably, the control module further includes a PWM adjusting unit, and the circuit equalizer further includes a detecting module, where the detecting module is configured to detect whether the voltages distributed to the load a and the load B are consistent with a preset voltage division ratio, and when the voltages distributed to the load a and the load B are not consistent with the preset voltage division ratio, the PWM adjusting unit adjusts a duty ratio of a PWM a signal output by the control module to the gate of the IGBT transistor Q1 and a duty ratio of a PWM B signal output by the control module to the gate of the IGBT transistor Q2, so that the voltage division ratio of the load a and the load B tends to the preset voltage division ratio.
Preferably, the control module further includes a dead time control unit, and the dead time control unit controls the PWM a signal and the PWM B signal output by the control module so that the IGBT Q1 and the IGBT Q2 are not simultaneously turned on.
Preferably, the control module further includes a single chip microcomputer, a first power amplification circuit, a second power amplification circuit and a control circuit, the single chip microcomputer is configured to set an initial PWM a signal and an initial PWM B signal, the initial PWM a signal and the initial PWMB signal determine the preset voltage division ratio, and the initial PWM a signal and the initial PWM B signal are respectively output to the control circuit through the first power amplification circuit and the second power amplification circuit to drive the IGBT Q1 and the IGBT Q2 to be alternately turned on.
Preferably, the control circuit comprises a control chip, an inductor L1 and an inductor L2, the model of the control chip is 2ED300C17-S, the model of the single chip microcomputer is STM32F030F4P, a PA10 pin and a PB1 pin of the single chip microcomputer output the initial PWM a signal and the initial PWM B signal to input ends of the first power amplification circuit and the second power amplification circuit respectively, and output ends of the first power amplification circuit and the second power amplification circuit are connected to an IN a pin and an INB pin of the control chip through the inductor L2 and the inductor L1 respectively.
Preferably, the control circuit comprises a control chip, the model of the control chip is 2ED300C17-S, and a Gate a pin, a COM a pin and a VCE sat1 pin of the control chip are respectively and electrically connected to a Gate, a first end and a second end of the IGBT Q1; the Gate B pin, the COM B pin, and the VCE sat2 pin of the control chip are electrically connected to the Gate, the first end, and the second end of the IGBT Q2, respectively.
Preferably, the control module further comprises resistors R7, R8, R9, R11, RGE _ A, R12, R13, RGE _ B, at least 6 diodes, and capacitors C16 and C20; a Gate A pin is connected to a Gate of an IGBT tube Q1 through a resistor R9, a VCE sat1 pin is connected to a second end of the IGBT tube Q1 through a resistor R8 and at least one diode which are sequentially connected in series, a resistor RGE _ A is connected between a first end and a second end of the IGBT tube Q1, two diodes which are reversely connected in series are connected between the first end and the second end of the IGBT tube Q1, a resistor R7 and a capacitor C16 which are connected in parallel are connected between an RC A pin and an E.A pin, and the E.A pin is also connected to a COM A pin; the Gate B pin is connected to the Gate of an IGBT tube Q2 through a resistor R13; the pin VCE sat2 is connected to the second end of the IGBT tube Q2 through a resistor R12 and at least one diode which are sequentially connected in series, a resistor RGE _ B is connected between the first end and the second end of the IGBT tube Q2, two diodes which are reversely connected in series are connected between the first end and the second end of the IGBT tube Q2, a resistor R11 and a capacitor C20 which are connected in parallel are connected between the pin RC B and the pin E.B, and the pin E.B is also connected to the pin COMB.
Preferably, the circuit equalizer further comprises a first clamping voltage module and a second clamping voltage module, and the Sense a pin and the Sense B pin of the control chip are respectively connected to the second end of the IGBT Q1 and the second end of the IGBT Q2 through the first clamping voltage module and the second clamping voltage module.
Preferably, a capacitor C11 is connected between the CA pin and the Mode pin, and the capacitor C11 is 470 nF; the capacitance C25 and the capacitance C26 are 100 μ F; the model of the IGBT tube Q1 and the model of the IGBT tube Q2 are FS100R07N3E4_ B11, and the load A and the load B comprise inductive electronic components and/or capacitive electronic components.
The invention also provides an unmanned aerial vehicle which comprises the circuit equalizer.
Compared with the prior art, the circuit equalizer and the unmanned aerial vehicle adopting the circuit equalizer can provide preset voltage division ratios for different loads connected in series, the loads connected in series can work stably and safely, and the condition that the loads do not work or are damaged due to the fact that all voltages are loaded on a certain load is avoided. Taking the preset voltage division ratio of 1:1 as an example, the power supply module provides voltage of V, the voltage loaded on the load A and the load B is set to be 1/2V, and relative to V, 1/2V is low voltage, and V is high voltage, so that the low voltage circuit can be merged into the high voltage circuit by using the circuit equalizer, and the electronic components can also work safely.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a circuit module with a load operating in series.
Fig. 2 is a schematic diagram of a circuit module structure of a circuit equalizer according to a first embodiment of the present invention.
Fig. 3 is a schematic diagram of a circuit module structure of a circuit equalizer according to a second embodiment of the present invention.
Fig. 4 is a more detailed circuit block diagram of the equalizer circuit of fig. 3.
Fig. 5 to 9 are specific circuit diagrams of the circuit equalizer according to the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2, a first embodiment of the present invention provides a circuit equalizer 10, which is used for making the voltage distributed by a power module on a serial load tend to a preset voltage division ratio, so as to ensure safe and stable operation of the serial load. The load may be a combination of one or more of purely resistive, inductive and capacitive electronics. Specifically, the electronic component may be a resistor, a capacitor, an inductor, a motor, a cylinder, a brushless motor, or the like. Preferably, the invention is particularly applicable to loads comprising inductive and/or capacitive electronic components. In this embodiment, a load a and a load B are connected in series as an example. The circuit equalizer 10 comprises a control module 11, an Insulated Gate Bipolar Transistor (IGBT) tube Q1 and an IGBT tube Q2, a capacitor C25, a capacitor C26 and a power module 13 for providing a voltage V, wherein gates of the IGBT tube Q1 and the IGBT tube Q2 are connected to the control module 11, the IGBT tube Q1 and the IGBT tube Q2 both have a first end and a second end, the second end of the IGBT tube Q1 is connected to the first end of the IGBT tube Q2, the power module is connected to the first end of the IGBT tube Q1, and the second end of the IGBT tube Q2 is grounded; a capacitor C25 and a load A are connected between the first end and the second end of the IGBT tube Q1 in parallel; the capacitor C26 and the load B are connected in parallel between the first end and the second end of the IGBT tube Q2. The control module 11 outputs PWM signals for controlling the IGBT Q1 and the IGBT Q2, specifically, a PWM a signal and a PWM B signal, where the PWM a signal and the PWM B signal control a voltage division ratio of the power module actually on the load a and the load B, and the waveforms of the PWM a signal and the PWM B signal are complementary. The PWM a signal and the PWM B signal respectively control the gate of the IGBT Q1 and the gate of the IGBT Q2, and the IGBT Q1 and the IGBT Q2 are alternately turned on. The capacitor C25 and the capacitor C26 play a protection role. The voltage V provided by the power module 13 is distributed to the load a and the load B according to a voltage division ratio determined by the PWM a signal and the PWM B signal, so that the voltages applied to the load a and the load B are safe operating voltages. The circuit balancer 10 ensures that the load a and the load B work under a stable and safe working voltage condition, and avoids the situation that the load does not work or is damaged due to the fact that the voltage is completely loaded on the load a or the load B.
Referring to fig. 3, a second embodiment of the present invention provides a circuit equalizer 20, which is different from the first embodiment in that: a detection module 15 is newly added, the detection module 15 is connected to the first end and the second end of the IGBT Q1 and the IGBT Q2 and is connected to the control module 11, the detection module 15 is configured to detect whether the voltage distributed to the load a and the load B is a preset voltage division ratio, a PWM adjustment unit 111 is disposed inside the control module 11, and when the actual voltage distributed to the load a and the load B is not consistent with the preset voltage division ratio, the PWM adjustment unit 111 adjusts the duty ratio of the PWM a signal output by the control module 11 to the gate of the IGBT Q1 and the duty ratio of the PWMB signal output to the gate of the IGBT Q2, so that the voltage division ratio of the load a and the load B tends to the preset voltage division ratio.
It is understood that the PWM adjusting unit 111 performs fine adjustment on the PWM a signal and the PWM B signal.
It is understood that, when determining whether the voltages distributed on the load a and the load B are consistent with the preset voltage division ratio, a threshold comparison method may be adopted, that is, a voltage threshold or a voltage division ratio threshold is set, the detection module 15 detects the voltages distributed on the load a and the load B, and then compares the voltages with the voltage threshold to obtain a comparison result, or compares the voltages with the voltage division ratio threshold after converting the voltages into the voltage division ratio to obtain the comparison result. When it is detected that the voltage actually distributed to the load a and the load B is greater than or less than the voltage threshold, or the voltage division ratio of the load a and the load B is greater than or less than the voltage threshold, the comparison result corresponds to that the voltage actually distributed to the load a and the load B is not consistent with the preset voltage division ratio, and the PWM adjusting unit 111 adjusts the duty ratio of the PWM a signal and/or the PWMB signal so that the voltage distributed to the load a and the load B tends to the preset voltage division ratio. On the contrary, the comparison result shows that the voltage actually distributed on the load A and the load B is consistent with the preset voltage division ratio without adjustment. Taking the power module 13 providing 800V voltage, and the preset voltage division ratio 1:1 as an example, when the detection module 15 detects that the actual voltages loaded on the load a and the load B deviate from the preset voltage division ratio by ± 10% (the voltage division ratio thresholds are 0.9 and 1.1), that is, the voltage division ratio is smaller than 0.9 (for example, the voltage loaded on the load a is 370V, and the voltage loaded on the load B is 430V), or is greater than 1.1 (for example, the voltage loaded on the load a is 430V, and the voltage loaded on the load B is 370V), that is, the voltages distributed on the load a and the load B are considered to be inconsistent with the preset voltage division ratio, the PWM adjusting unit 111 adjusts the duty ratio of the PWM a signal and/or the PWM B signal; otherwise, no adjustment is required.
The control module 11 further includes a dead time control unit 113 for setting a dead time, and the dead time control unit 113 controls the PWM a signal and the PWM B signal output from the control module 11 so that the IGBT Q1 and the IGBT Q2 are not simultaneously turned on. As an embodiment, the dead time control unit 113 is connected to the PWM adjusting unit 111, and adjusts the PWM a signal and the PWM B signal output by the PWM adjusting unit 111 so that the IGBT Q1 and the IGBT Q2 are not simultaneously turned on.
Fig. 4 is a schematic diagram of a further detailed circuit structure of the second embodiment of the present invention, in which the control module 11 includes a single chip 115, a first power amplifier circuit 112, a second power amplifier circuit 114, and a control circuit 117, the single chip 115 is used for programming a control program, the single chip 115 outputs an initial PWM signal, the initial PWM signal includes an initial PWM a signal and an initial PWM B signal, and the initial PWM a signal and the initial PWM B signal determine a preset voltage division ratio, that is, the voltage that a user desires to load on the load a and the load B. The initial PWM a signal and the initial PWM B signal respectively pass through the first power amplifier circuit 112 and the second power amplifier circuit 114 to generate a PWM a signal and a PWM B signal, and then are output to the control circuit 117, and the control circuit 117 drives the IGBT Q1 and the IGBT Q2 to be alternately turned on by outputting the PWM a signal and the PWM B signal. The control circuit 117 includes a PWM adjusting unit 111 and a dead time control unit 113, and when the voltages distributed across the load a and the load B do not coincide with the preset voltage division ratio, the PWM adjusting unit 111 adjusts the duty ratio of the PWM a signal output from the control module 11 to the gate of the IGBT tube Q1 and the duty ratio of the PWM B signal output to the gate of the IGBT tube Q2 so that the voltages distributed across the load a and the load B tend to the preset voltage division ratio. Dead time control unit 113 adjusts the PWM a signal and the PWM B signal so that IGBT Q1 and IGBT Q2 are not turned on at the same time. The circuit design cost is low while the cooperation of the single chip 115, the power amplification circuit (including the first power amplification circuit 112 and/or the second power amplification circuit 114) and the control circuit 117 meets the power consumption requirements of different circuit modules.
Referring to fig. 5 to 9, a third embodiment of the invention provides a circuit for implementing the circuit equalizer 10.
The control circuit 117 comprises a control chip, the model of the control chip is 2ED300C17-S, and the model of the singlechip 115 is STM32F030F 4P.
The single chip 115 includes 20 pins for external connection, and as shown in fig. 5, the 20 external connection ports are electrically configured as follows:
BOOT0 pin (pin 1): ground through resistor R3;
PF0-OSC _ IN pin (pin 2): the capacitor C3 is grounded and connected to the first end of the crystal oscillator T;
PF4-OSC _ OUT pin (pin 3): the capacitor C2 is grounded and connected to the second end of the crystal oscillator T;
NRST pin (pin 4): pin 5 connected to pin header P1 (see fig. 6); and is further connected to the first terminal of the resistor R1, the first terminal of the switch K1, and the first terminal of the capacitor C1, the second terminal of the resistor R1 is connected to the first power supply voltage, and the second terminal of the switch K1 and the second terminal of the capacitor C1 are both grounded.
VDDA pin (pin 5): used for connecting a first power supply voltage;
PA0-PA4 pin, PA6, PA7 and PA9 pin ( pins 6, 7, 8, 9, 10, 12, 13, 17): suspending in the air;
PA5 pin (pin 11): the resistor R2 and the LED are connected in series and grounded;
PB1 pin (pin 14): for connecting the second power amplifier circuit 114;
VSS and VDD pins (pins 15, 16): used for connecting a first power supply voltage;
PA10 pin (pin 18): for connecting the first power amplifying circuit 112;
PA13, PA14 pin (pins 19, 20): for connecting pin No. 3 and pin No. 2 of pin header P1.
Pin header P1 includes 5 pins, a1 st pin connected to a first supply voltage and a4 th pin connected to ground. The pin header P1 is used for burning programs to the singlechip 115.
Referring to fig. 7A, the first power amplifying circuit 112 includes a resistor R14, a transistor Q3, a transistor Q4, a resistor R15, a resistor R16, a diode D21, a MOS transistor Q5, and a resistor R17, a first end of the R14 is connected to a pin PA10 of the mcu 115, a second end of the R14 is connected to bases of the transistor Q3 and the transistor Q4, an emitter of the transistor Q3 is connected to an emitter of the transistor Q4, a collector of the transistor Q3 is connected to the second power supply voltage, and a collector of the transistor Q4 is grounded. A first end of the resistor R15 is connected to an emitter of the transistor Q3 and an emitter of the transistor Q4, a second end of the resistor R15 is connected to a gate of the MOS transistor Q5, the resistor R16 and a cathode of the diode D21, anodes of the resistor R16 and the diode D21 and a source of the MOS transistor Q5 are grounded, a drain of the MOS transistor Q5 is connected to a second power supply voltage through the resistor R17, and a drain of the MOS transistor Q5 outputs a PWM signal to the control chip, specifically, the drain of the MOS transistor Q5 is defined to output the PWM signal as a PWM a signal.
Referring to fig. 7B, the second power amplifying circuit 114 includes a resistor R18, a transistor Q6, a transistor Q7, a resistor R19, a resistor R120, a diode D22, a MOS transistor Q8, and a resistor R21, a first end of the resistor R18 is connected to a PB1 pin of the mcu 115, a second end of the resistor R18 is connected to bases of a transistor Q6 and a transistor Q7, an emitter of the transistor Q6 is connected to an emitter of the transistor Q7, a collector of the transistor Q6 is connected to the second power supply voltage, and a collector of the transistor Q7 is grounded. A first end of the resistor R19 is connected to an emitter of the transistor Q6 and an emitter of the transistor Q7, a second end of the resistor R19 is connected to a gate of the MOS transistor Q8, the resistor R20 and a cathode of the diode D22, anodes of the resistor R20 and the diode D22 and a source of the MOS transistor Q8 are grounded, a drain of the MOS transistor Q8 is connected to a second power supply voltage through the resistor R21, and a drain of the MOS transistor Q8 outputs a PWM signal to the control chip, specifically, the drain of the MOS transistor Q8 is defined to output the PWM signal as a PWM B signal.
The control chip includes 45 pins for external connection, as shown in fig. 8, the 45 external connection ports sequentially include according to the serial number sequence of the pins of the single chip microcomputer 115:
VDD pin (pins 1, 2, 3): connecting a second fixed voltage and a resistor R4;
fault pin (pins 4, 10): the second end of the resistor R4 is connected and outputs a FaultA/B signal;
reset pin (pin 5): grounding;
CA pin (pin 6): a first terminal connected to a capacitor C11;
INB pin (pin 7): the inductor L1 is connected with the drain electrode of a MOS tube Q8 in the second power amplifying circuit;
CB pin (pin 8): the connecting capacitor C12 is grounded;
mode pin (pin 9): a second terminal connected to the capacitor C11;
INA pin (pin 11): the power amplifier is connected with the drain electrode of a MOS tube Q5 in the first power amplifying circuit through an inductor L2;
GND pins (pins 12, 13, pins 19 to 23): grounding;
VDC pins (pins 14 to 18): the second power supply voltage is connected, the first end of the resistor R5 is connected, and the second end of the resistor R5 is connected with the ground through the capacitor C8, the capacitor C9 and the capacitor C10 which are connected in parallel;
gate a pin (pins 44, 45): the output signal is defined as a Gate A signal and is electrically connected with the grid of the IGBT tube Q1;
COM a pins (pins 42, 43): the output signal is defined as Emitter A signal and is electrically connected with the first end of the IGBT tube Q1;
VA + + pin (pin 41): the capacitor C13 is connected to a COM A pin;
VA- -Pin (Pin 40): the capacitor C14 is connected to a COM A pin, and the capacitor C14 is also connected with a first end of a resistor R6;
sense a pin (pin 39): the output signal is defined as a Sense A signal, and a Sense A pin is also connected with a second end of the resistor R6;
RCA pin (pin 38): the capacitor C16 is connected to a COMA pin through a resistor R7 in parallel;
VCE sat1 pin (pin 37): the output signal is defined as a Collector A signal and is electrically connected with the second end of the IGBT tube Q1; the VCE sa1t pin is also connected to the COM A pin through a capacitor C15;
e.a pin (pin 36): connecting to a COM A pin;
gate B pin (pins 32, 33): the output signal is defined as a Gate B signal and is electrically connected with the grid of the IGBT tube Q2;
COM B pin (pins 30, 31): the output signal is defined as Emitter B signal and is electrically connected with the first end of the IGBT tube Q2;
VB + + pin (pin 29): the voltage is connected to a COMB pin through a capacitor C17;
VB- -Pin (Pin 28): the capacitor C18 is connected to a COM B pin, and the capacitor C18 is also connected with a first end of a resistor R10;
sense B pin (pin 27): the output signal is defined as a Sense B signal, and a Sense B pin is also connected with a second end of the resistor R10;
RCB pin (pin 26): the resistor R11 and the capacitor C20 which are connected in parallel are connected to a COMB pin;
VCE sat2 pin (pin 25): the output signal is defined as Collector B signal, and the Collector B signal is electrically connected with the second end of the IGBT tube Q1; the VCE sat2 pin is also connected to the COM B pin through a capacitor C19;
E.B pin (pin 24): connected to the COM B pin.
Referring to fig. 9, the embodiment further includes a first clamping voltage module for clamping the voltage, specifically, 5 diodes D5-D10. Diodes D5-D10 are connected in series in sequence, a diode D5 is connected in series with a diode D6 in reverse direction, and diodes D6-D10 are connected in series in forward direction; the Sense A pin of the control chip is connected with the cathode of the diode D5, and the cathode of the diode D10 is connected with the second end of the IGBT tube Q1.
The specific circuit further comprises diodes D1-D4, resistors R8, R9, RGE _ A, an IGBT tube Q1 and a capacitor C25, wherein the resistor R8 is sequentially connected with the diodes D2 and D1 in series in a forward direction, a VCE sat1 pin of the control chip is connected to one end of the resistor R8, and the cathode of the diode D1 is connected with the second end of the IGBT tube Q1; a Gate A pin of the control chip is connected to a Gate of an IGBT tube Q1 through a resistor R9, and a COM A pin is connected to a first end of the IGBT tube Q1; the diodes D3 and D4 are connected between the grid and the first end of the IGBT tube Q1 after being connected in series in an opposite direction; the resistor RGE _ A is also connected between the gate and the first end of the IGBT tube Q1; capacitor C25 is connected between the first and second terminals of IGBT Q1, and load a is connected between the first and second terminals of IGBT Q1. The second terminal of the IGBT Q1 is connected to the load power supply.
With continued reference to fig. 9, the exemplary circuit further includes a second clamping voltage module for clamping voltages, specifically, 5 diodes D15-D20. Diodes D15-D20 are connected in series in sequence, a diode D15 is connected in series with a diode D16 in reverse direction, and diodes D16-D20 are connected in series in forward direction; the Sense B pin of the control chip is connected with the cathode of the diode D15, and the cathode of the diode D20 is connected with the second end of the IGBT tube Q2.
The specific circuit further comprises diodes D11-D14, resistors R12, R13, RGE _ B, an IGBT tube Q2 and a capacitor C26, wherein the resistor R12 is sequentially connected with the diodes D12 and D11 in series in a forward direction, a VCE sat2 pin of the control chip is connected to one end of the resistor R12, and the cathode of the diode D11 is connected with the first end of the IGBT tube Q1 and the second end of the IGBT tube Q2; a GateB pin of the control chip is connected to a gate of an IGBT tube Q2 through a resistor R13, and a COM B pin is connected to a first end of the IGBT tube Q2; the diodes D13 and D14 are connected between the grid and the first end of the IGBT tube Q2 after being connected in series in an opposite direction; the resistor RGE _ B is also connected between the gate and the first end of the IGBT tube Q2; capacitor C26 is connected between the first and second terminals of IGBT Q2, and load B is connected between the first and second terminals of IGBT Q2. The first end of the IGBT Q2 is grounded.
The diodes D5-D10, D15-D20 are model SM6T 220A. The type of the diodes D1, D2, D11 and D12 is UF 4007. IGBT transistor Q1 and IGBT transistor Q2 are model FS100R07N3E4_ B11.
The capacitance C25 and the capacitance C26 were 100 μ F. The capacitor C11 is sized at 470nF, the size of which determines the amount of dead time. The resistance of resistor R7 and resistor R11 control the voltage threshold or voltage ratio threshold. As an example, the resistor R7 and the resistor R11 have the same resistance and are both 12K.
In one embodiment, the first supply voltage is 3-5V, and in one embodiment, the first supply voltage is 3.3V, and the second supply voltage is 12-25V, and in one embodiment, the second supply voltage is 15V.
It is understood that the number of diodes and resistors in the present invention can be adaptively adjusted as desired. Such as the number of diodes in the first clamping voltage block and/or the second clamping voltage block, may be adjusted as desired.
It is understood that the present invention describes the electrical signal by taking the division voltage as an example. Electrical signals include, but are not limited to, voltage signals and/or current signals, etc.
It is understood that only two loads are used as an example in the present invention, the number of the loads may also be 4, 6, 8, etc., and the circuit equalizer may also be used to ensure the normal operation of the serial connection.
A fourth embodiment of the present invention provides an unmanned aerial vehicle including the circuit equalizer described in any one of the first to third embodiments.
Compared with the prior art, the circuit equalizer and the unmanned aerial vehicle adopting the circuit equalizer can provide preset voltage division ratio for different loads connected in series, the loads connected in series can work stably and safely, and the situation that the loads do not work or are damaged due to the fact that voltage is loaded on a certain load completely is avoided. Taking the preset voltage division ratio of 1:1 as an example, the power supply module provides voltage of V, the voltage loaded on the load A and the load B is set to be 1/2V, and relative to V, 1/2V is low voltage, and V is high voltage, so that the low voltage circuit can be merged into the high voltage circuit by using the circuit equalizer, and the electronic components can also work safely.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A circuit equalizer for approximating a voltage distributed across a series connected load a and load B by a power supply module to a preset voltage division ratio, characterized by: the power supply comprises a control module, an IGBT tube Q1, an IGBT tube Q2, a capacitor C25, a capacitor C26 and a power supply module, wherein the IGBT tube Q1 and the IGBT tube Q2 are respectively provided with a grid, a first end and a second end, the grids of the IGBT tube Q1 and the IGBT tube Q2 are connected with the control module, the second end of the IGBT tube Q1 is connected with the first end of the IGBT tube Q2, the power supply module is connected with the second end of the IGBT tube Q1, and the second end of the IGBT tube Q2 is grounded; a capacitor C25 and a load A are connected between the first end and the second end of the IGBT tube Q1 in parallel; a capacitor C26 and a load B are connected between the first end and the second end of the IGBT tube Q2 in parallel;
the control module outputs a PWM A signal and a PWM B signal which respectively control a grid of an IGBT tube Q1 and a grid of an IGBT tube Q2, the PWM A signal and the PWM B signal control the voltage division ratio of the power module on a load A and a load B actually, and the waveforms of the PWM A signal and the PWM B signal are complementary so that the IGBT tube Q1 and the IGBT tube Q2 are conducted alternately.
2. The circuit equalizer of claim 1, wherein: the control module further comprises a PWM adjusting unit, the circuit equalizer further comprises a detection module, the detection module is used for detecting whether the voltage distributed on the load A and the load B is consistent with a preset voltage division ratio, and when the voltage distributed on the load A and the load B is not consistent with the preset voltage division ratio, the PWM adjusting unit adjusts the duty ratio of a PWM A signal output by the control module to the grid electrode of the IGBT tube Q1 and the duty ratio of a PWMB signal output by the control module to the grid electrode of the IGBT tube Q2, so that the voltage division ratio of the load A and the load B tends to the preset voltage division ratio.
3. The circuit equalizer of claim 1, wherein: the control module further comprises a dead time control unit which controls the PWM A signal and the PWM B signal output by the control module so that the IGBT tube Q1 and the IGBT tube Q2 are not conducted simultaneously.
4. The circuit equalizer of any of claims 1-3, wherein: the control module further comprises a single chip microcomputer, a first power amplification circuit, a second power amplification circuit and a control circuit, wherein the single chip microcomputer is used for setting an initial PWM A signal and an initial PWM B signal, the initial PWM A signal and the initial PWM B signal determine the preset voltage division ratio, and the initial PWM A signal and the initial PWM B signal are respectively output to the control circuit through the first power amplification circuit and the second power amplification circuit so as to drive the IGBT tube Q1 and the IGBT tube Q2 to be conducted alternately.
5. The circuit equalizer of claim 4, wherein: the control circuit comprises a control chip, an inductor L1 and an inductor L2, the model of the control chip is 2ED300C17-S, the model of the single chip microcomputer is STM32F030F4P, a PA10 pin and a PB1 pin of the single chip microcomputer output the initial PWM A signal and the initial PWM B signal to the input ends of the first power amplification circuit and the second power amplification circuit respectively, and the output ends of the first power amplification circuit and the second power amplification circuit are connected to an IN A pin and an IN B pin of the control chip through the inductor L2 and the inductor L1 respectively.
6. The circuit equalizer of claim 4, wherein: the control circuit comprises a control chip, wherein the model of the control chip is 2ED300C17-S, and a Gate A pin, a COM A pin and a VCE sat1 pin of the control chip are respectively and electrically connected with a grid electrode, a first end and a second end of an IGBT tube Q1; the Gate B pin, the COM B pin, and the VCE sat2 pin of the control chip are electrically connected to the Gate, the first end, and the second end of the IGBT Q2, respectively.
7. The circuit equalizer of claim 6, wherein: the control module further comprises resistors R7, R8, R9, R11, RGE _ A, R12, R13, RGE _ B, at least 6 diodes and capacitors C16 and C20;
a Gate A pin is connected to a Gate of an IGBT tube Q1 through a resistor R9, a VCE sat1 pin is connected to a second end of the IGBT tube Q1 through a resistor R8 and at least one diode which are sequentially connected in series, a resistor RGE _ A is connected between a first end and a second end of the IGBT tube Q1, two diodes which are reversely connected in series are connected between the first end and the second end of the IGBT tube Q1, a resistor R7 and a capacitor C16 which are connected in parallel are connected between an RC A pin and an E.A pin, and the E.A pin is also connected to a COM A pin;
the Gate B pin is connected to the Gate of an IGBT tube Q2 through a resistor R13; the pin VCE sat2 is connected to the second end of the IGBT tube Q2 through a resistor R12 and at least one diode which are sequentially connected in series, a resistor RGE _ B is connected between the first end and the second end of the IGBT tube Q2, two diodes which are reversely connected in series are connected between the first end and the second end of the IGBT tube Q2, a resistor R11 and a capacitor C20 which are connected in parallel are connected between the pin RC B and the pin E.B, and the pin E.B is also connected to the pin COMB.
8. The circuit equalizer of claim 6, wherein: the circuit equalizer further comprises a first clamping voltage module and a second clamping voltage module, and a Sense A pin and a Sense B pin of the control chip are respectively connected to the second end of the IGBT tube Q1 and the second end of the IGBT tube Q2 through the first clamping voltage module and the second clamping voltage module.
9. The circuit equalizer of claim 1, wherein: a capacitor C11 is connected between the CA pin and the Mode pin, and the capacitance C11 is 470 nF; the capacitance C25 and the capacitance C26 are 100 μ F; the model of the IGBT tube Q1 and the model of the IGBT tube Q2 are FS100R07N3E4_ B11, and the load A and the load B comprise inductive electronic components and/or capacitive electronic components.
10. Unmanned aerial vehicle, its characterized in that: comprising a circuit equalizer as claimed in any one of claims 1-9.
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|---|---|---|---|
| CN201811348080.4A CN111181390A (en) | 2018-11-13 | 2018-11-13 | Circuit equalizer and unmanned aerial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811348080.4A CN111181390A (en) | 2018-11-13 | 2018-11-13 | Circuit equalizer and unmanned aerial vehicle |
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| CN111181390A true CN111181390A (en) | 2020-05-19 |
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Application publication date: 20200519 |
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