CN115603565A - Novel switch driving power supply based on power supply feedforward and electronic damping - Google Patents

Novel switch driving power supply based on power supply feedforward and electronic damping Download PDF

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Publication number
CN115603565A
CN115603565A CN202211347237.8A CN202211347237A CN115603565A CN 115603565 A CN115603565 A CN 115603565A CN 202211347237 A CN202211347237 A CN 202211347237A CN 115603565 A CN115603565 A CN 115603565A
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China
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resistor
positive
grounded
capacitor
power supply
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Inventor
曾忠
郑沛坤
陈德桂
刘昕倩
钟庆楠
陈德传
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Shenzhen Microtech Power System Co ltd
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Shenzhen Microtech Power System Co ltd
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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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

The invention discloses a novel switch driving power supply based on power supply feedforward and electronic damping. The circuit comprises a control and detection circuit and a PWM (pulse-width modulation) variable-current output circuit, and specifically comprises an instrument operational amplifier IC1, an adjusting operational amplifier IC2, a damping operational amplifier IC3, a multiplier IC4, a feedback operational amplifier IC5, a PWM power amplifier IC6, a power module PM1, a selector switch K1 and the like. The invention utilizes simple electronic circuit and PWM power amplifier circuit, feed forward self-tuning the forward channel parameter of the system when the power supply of DC/DC switching power supply changes in a certain range, which makes it basically not affect the dynamic voltage stabilization performance, and at the same time, aiming at the problem that the switching power supply has no damping in no load and extremely low damping in light load, introduces electronic damping action, and does not need to connect the internal minimum load which consumes power and reduces efficiency in parallel at the power output stage, so that the switching power supply can also stabilize the voltage in no load.

Description

Novel switch driving power supply based on power supply feedforward and electronic damping
Technical Field
The invention belongs to the field of industrial measurement and control, relates to a circuit, and particularly relates to a novel switch driving power supply based on power supply feedforward and electronic damping, which is suitable for various application occasions requiring high-performance switch power supplies, high-efficiency electric driving devices and the like.
Background
The power supply is a basic component in various electric control system devices, and especially, the switching power supply has the advantages of high efficiency, small size and the like, so that the switching power supply is widely applied in various industries, but the existing switching power supply also has some technical problems to be solved and improved, such as: (1) At present, the requirements on the performance of the switching power supply mainly focus on efficiency, volume, static precision and the like, but the dynamic performance, the interference resistance and the like are not sufficiently focused, so that the dynamic voltage stabilization performance of the switching power supply is difficult to meet the requirements on occasions with large load variation range and frequent variation; (2) The switching power supply has poor stability under light load, particularly a high-power switching power supply generally stipulates the load use condition of the allowed minimum load rate, and the low-power switching power supply does not have high requirement on efficiency, so that an internal output stage of the switching power supply is often adopted and a resistor with the minimum load rate is ensured, so that the switching power supply can stably run in no-load mode, and the cost is reduced. (3) When a switching power supply, such as a DC/DC switching power supply, is especially used for supplying and stabilizing power for new energy resources such as photovoltaic power, the dynamic voltage stabilization performance of the switching power supply is also affected due to the large fluctuation range of the supply voltage.
Therefore, the invention provides a novel switch driving power supply based on supply voltage feedforward and electronic damping to solve the main problems, and the novel switch driving power supply can also be used for a high-efficiency electric driving power amplifier, so that the novel switch power supply not only has universality, but also has multiple functions to expand the application range, and has practical significance for further improving the dynamic and static performance and the load adaptability of the switch power supply.
Disclosure of Invention
The invention aims to provide a novel switch driving power supply based on power supply feedforward and electronic damping, aiming at the defects in the prior art. The invention utilizes simple electronic circuit and PWM power amplifier circuit, carry on feedforward self-tuning to the forward channel parameter of the system when the supply voltage of DC/DC switching power supply changes in certain extent, make it basically not influence the dynamic voltage stabilization performance that the circuit outputs, meanwhile, to the question that the no-damping of idle load that the switching power supply has, the light load damping is extremely low, introduce the electronic damping function, and does not need to connect the internal minimum load consuming power, reducing the power efficiency in parallel at the power output stage, make the switching power supply can stabilize the voltage when the idle load, the circuit structure of the invention is simple, with low costs, have universality.
A novel switch driving power supply based on power supply feedforward and electronic damping comprises a control and detection circuit and a PWM (pulse-width modulation) variable current output circuit.
The control and detection circuit comprises an instrument operational amplifier IC1, an adjusting operational amplifier IC2, a damping operational amplifier IC3, a multiplier IC4, a feedback operational amplifier IC5, a selection switch K1, an instruction potentiometer RP1, an adjusting potentiometer RP2, a damping potentiometer RP3, an instruction resistor R1, a feedback resistor R2, a left integral resistor R3, a left divider resistor R4, a right integral resistor R5, a right divider resistor R6, a differential resistor R7, a left damping resistor R8, a right damping resistor R9, an upper feedforward resistor R10, a lower feedforward resistor R11, a negative detection resistor R12, a positive detection resistor R13, a positive resistor R14, a gain resistor R15, an instruction capacitor C1, a feedback capacitor C2, an integral capacitor C3, a differential capacitor C4, a positive end capacitor C5 and a gain capacitor C6, wherein the upper end of the instruction potentiometer RP1 is connected with the voltage-stabilizing end SF end of the multiplier IC4, the lower end of the multiplier is grounded, the central end of the RP1 is connected with the I end of the selection switch K1, and the external end of the instruction potentiometer U1 is connected with the external control end of the external control connector * The end connection, the common end C end of the K1 is connected with one end of an instruction resistor R1, the other end of the R1 is connected with one end of an instruction capacitor C1 and a positive input end IN + end of an instrument operational amplifier IC1, the other end of the C1 is grounded, the negative input end IN-end of the IC1 is connected with one end of a feedback resistor R2 and one end of a feedback capacitor C2, the other end of the C2 is grounded, and the positive end RG + end of a gain resistor of the IC1The amplifier is connected with the left end and the center end of an adjusting potentiometer RP2, the negative terminal RG-terminal of a gain resistor of an IC1 is connected with the right end of the RP2, the REF terminal of a reference terminal REF of the IC1 is grounded, the positive terminal Vcc terminal of the IC1 is connected with the positive terminal Vcc terminal of a circuit, the ground terminal GND terminal of the IC1 is grounded, the output terminal OUT terminal of the IC1 is connected with one terminal of a left divider resistor R4, the other terminal of the R4 is connected with one terminal of a right divider resistor R6 and the positive input terminal IN + terminal of the adjusting operational amplifier IC2, the other terminal of the R6 is grounded, the negative input terminal IN-terminal of the IC2 is connected with one terminal of a left integrating resistor R3 and one terminal of a right integrating resistor R5, the other terminal of the R3 is grounded, the other terminal of the R5 is connected with one terminal of an integrating capacitor C3, the other terminal of the C3 is connected with the OUT terminal of the output terminal of the IC2 and the bias negative terminal Z2 terminal of the multiplier IC4, the positive terminal Vcc terminal of the circuit is connected with the ground terminal Vcc terminal of the IC2, the bias positive terminal Z1 of IC4 is connected with the output terminal OUT of the damping operational amplifier IC3, the right terminal of the damping potentiometer RP3 and the center terminal thereof, the positive terminal X1 of multiplier 1 of IC4 is connected with one terminal of the upper feedforward resistor R10 and one terminal of the lower feedforward resistor R11, the other terminal of R11 is grounded, the negative terminal X2 of multiplier 1 of IC4 is grounded, the positive terminal Y1 of multiplier 2 of IC4 is grounded, the negative terminal Y2 of multiplier 2 of IC4 is connected with the output terminal OUT of IC4 and the AIN terminal of the analog command terminal of PWM power amplifier IC6, the positive terminal Vcc terminal of IC4 is connected with the positive terminal Vcc terminal of the circuit, the ground terminal GND of IC4 is grounded, the other terminal of R10 is connected with the Us terminal of the main power supply terminal of IC6, the Us terminal of the connecting piece CN1, the positive terminal of the power supply capacitor C10 and the input terminal IN terminal of the power module PM1, the other terminal of R2 is connected with one terminal of the differential capacitor C4, the output terminal of the feedback operational amplifier IC5, one terminal OUT, one terminal of the gain resistor R15 and one terminal of the gain capacitor C6, the other end of the C4 is connected with one end of a differential resistor R7 and the positive input end IN + end of the damping operational amplifier IC3, the other end of the R7 is grounded, the negative input end IN-end of the IC3 is connected with one end of a left damping resistor R8 and one end of a right damping resistor R9, the other end of the R8 is grounded, the other end of the R9 is connected with the left end of the RP3, the positive power source end Vcc end of the IC3 is connected with the positive power source end Vcc end of the circuit, the ground end GND end of the IC3 is grounded, the positive input end IN + end of the IC5 is connected with one end of a positive detection resistor R13, one end of a positive resistor R14 and one end of a positive capacitor C5, the other end of the R14 and the other end of the C5 are grounded, and the negative input end IN-end of the IC5 is connected with the positive input end IN + end of a negative detection resistor R12One end, the other end of the R15 and the other end of the C6 are connected, a positive power supply terminal Vcc end of the IC5 is connected with a positive power supply terminal Vcc end of the circuit, and a ground terminal GND end of the IC5 is grounded.
The PWM variable current output circuit comprises a PWM power amplifier IC6, a power module PM1, a connecting piece CN1, a current-limiting resistor R16, a protective resistor R17, a protective capacitor C7, an output capacitor C8, a power capacitor C9, a power supply capacitor C10 and an inductor L1, wherein a clock input end CLKIN end of the PWM power amplifier IC6 is connected with a clock output end CLKOUT end of the IC6, a positive power source end Vcc end of the IC6 is connected with a positive power source end Vcc end of the circuit, a ground end GND end of the IC6 is grounded, an A half-bridge current end IsenA end of the IC6 is connected with a B half-bridge current end IsenB end of the IC6, one end of the current-limiting resistor R16 and one end of the protective resistor R17, the other end of the R16 is grounded, the other end of the R17 is connected with a blocking end SHDN end of the IC6 and one end of the protective capacitor C7, the other end of the C7 is grounded, an A half-bridge output end AOUT end of the IC6 is connected with one end of the inductor L1, and a PWM voltage output end U1 of the CN1 PWM The end connection, L1's the other end and output capacitor C8's positive end, CN 1's positive output OUT + end, positive detection resistance R13's the other end is connected, IC 6's B half-bridge output BOUT end and C8's negative end, CN 1's negative output OUT-end, negative detection resistance R12's the other end is connected, power module PM 1's output OUT end and power capacitor C9's positive end, circuit positive power source end Vcc end is connected, PM 1's ground terminal GND end ground connection, C9's negative terminal ground connection, C10's negative terminal ground connection.
The invention has the following beneficial effects:
the invention utilizes simple electronic circuit and PWM power amplifier circuit to feed forward self-adjust the forward channel parameter of the system when the supply voltage of the DC/DC switch power supply changes in a certain range, so that the dynamic voltage stabilization performance is not affected basically, and meanwhile, aiming at the problems of no-load damping and extremely low light-load damping of the switch power supply, the electronic damping function is introduced, the internal minimum load which consumes power and reduces efficiency is not needed to be connected in parallel at the power output stage, so that the switch power supply can also stably operate in voltage stabilization when in no-load.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, a novel switch driving power supply based on power supply feedforward and electronic damping includes a control and detection circuit and a PWM variable current output circuit.
The control and detection circuit comprises an instrument operational amplifier IC1, an adjusting operational amplifier IC2, a damping operational amplifier IC3, a multiplier IC4, a feedback operational amplifier IC5, a selection switch K1, an instruction potentiometer RP1, an adjusting potentiometer RP2, a damping potentiometer RP3, an instruction resistor R1, a feedback resistor R2, a left integral resistor R3, a left divider resistor R4, a right integral resistor R5, a right divider resistor R6, a differential resistor R7, a left damping resistor R8, a right damping resistor R9, an upper feedforward resistor R10, a lower feedforward resistor R11, a negative detection resistor R12, a positive detection resistor R13, a positive resistor R14, a gain resistor R15, an instruction capacitor C1, a feedback capacitor C2, an integral capacitor C3, a differential capacitor C4, a positive end capacitor C5 and a gain capacitor C6, wherein the upper end of the instruction potentiometer RP1 is connected with the voltage-stabilizing end SF end of the multiplier IC4, the lower end of the multiplier is grounded, the central end of the RP1 is connected with the I end of the selection switch K1, and the external end of the instruction potentiometer U1 is connected with the external control end of the external control connector * The common end C of the K1 is connected with one end of a command resistor R1, the other end of the R1 is connected with one end of a command capacitor C1 and the positive input end IN + of an instrument operational amplifier IC1, the other end of the C1 is grounded, the negative input end IN-end of the IC1 is connected with one end of a feedback resistor R2 and one end of a feedback capacitor C2, the other end of the C2 is grounded, the gain resistor positive end RG + of the IC1 is connected with the left end and the central end of an adjusting potentiometer RP2, the gain resistor negative end RG-end of the IC1 is connected with the right end of the RP2, the reference end REF of the IC1 is grounded, the positive power supply terminal Vcc end of IC1 is connected with circuit positive power supply terminal Vcc end, the ground terminal GND end of IC1 is grounded, the output end OUT end of IC1 is connected with one end of left divider resistor R4, the other end of R4 is connected with one end of right divider resistor R6, the positive input end IN + end of regulation operational amplifier IC2 is connected, the other end of R6 is grounded, the negative input end IN-end of IC2 is connected with one end of left integral resistor R3, one end of right integral resistor R5, the other end of R3 is grounded, the other end of R5 is connected with one end of integral capacitor C3, the other end of C3 is connected with one end of IC2The output end OUT end, the bias negative end Z2 end of the multiplier IC4, the positive power end Vcc end of the IC2 is connected with the positive power end Vcc end of the circuit, the ground end GND end of the IC2 is grounded, the bias positive end Z1 end of the IC4 is connected with the output end OUT end of the damping operational amplifier IC3, the right end and the center end of the damping potentiometer RP3, the multiplier 1X 1 end of the IC4 is connected with one end of an upper feedforward resistor R10 and one end of a lower feedforward resistor R11, the other end of the R11 is grounded, the multiplier 1 negative end X2 end of the IC4 is grounded, the multiplier 2 positive end Y1 end of the IC4 is grounded, the multiplier 2 negative end Y2 end of the IC4 is connected with the output end OUT end of the IC4 and the analog instruction end AIN end of the power amplifier IC6, the positive power end Vcc end of the IC4 is connected with the positive power end Vcc end of the circuit, the ground end of the IC4 is grounded, the other end of the R10 is connected with the main power supply end Us end of the IC6, the power supply end CN1, the PM1 input end of the power supply capacitor C10, the other end of the R2 is connected with one end of a differential capacitor C4, an output end OUT end of a feedback operational amplifier IC5, one end of a gain resistor R15 and one end of a gain capacitor C6, the other end of the C4 is connected with one end of a differential resistor R7 and a positive input end IN + end of a damping operational amplifier IC3, the other end of the R7 is grounded, a negative input end IN-end of the IC3 is connected with one end of a left damping resistor R8 and one end of a right damping resistor R9, the other end of the R8 is grounded, the other end of the R9 is connected with the left end of the RP3, a positive power end Vcc end of the IC3 is connected with a positive power Vcc end of a circuit, a ground end GND end of the IC3 is grounded, a positive input end IN + end of the IC5 is connected with one end of a positive detection resistor R13, one end of a positive resistor R14 and one end of a positive end capacitor C5, the other end of the R14 and the other end of the C5 are both grounded, a negative input end IN-end of the IC5 is connected with one end of a negative detection resistor R12, one end of a negative detection resistor R15, and the other end of the amplifier IC5, the other end of the C6 is connected, a positive power supply terminal Vcc end of the IC5 is connected with a positive power supply terminal Vcc end of the circuit, and a ground terminal GND end of the IC5 is grounded.
The PWM variable current output circuit comprises a PWM power amplifier IC6, a power module PM1, a connecting piece CN1, a current limiting resistor R16, a protective resistor R17, a protective capacitor C7, an output capacitor C8, a power capacitor C9, a power supply capacitor C10 and an inductor L1, wherein a clock input end CLKIN end of the PWM power amplifier IC6 is connected with a clock output end CLKOUT end of the IC6, a positive power source end Vcc end of the IC6 is connected with a positive power source end Vcc end of a circuit, a ground end GND end of the IC6 is grounded, an A half-bridge current end IsenA end of the IC6 is connected with a B half-bridge current end of the IC6The end IsenB, one end of a current-limiting resistor R16 and one end of a protection resistor R17 are connected, the other end of the R16 is grounded, the other end of the R17 is connected with a blocking end SHDN of the IC6 and one end of a protection capacitor C7, the other end of the C7 is grounded, an A half-bridge output end AOUT end of the IC6, one end of an inductor L1 and a PWM voltage output end U of the CN1 are connected with each other PWM The end connection, L1's the other end and output capacitor C8's positive end, CN 1's positive output OUT + end, positive detection resistance R13's the other end is connected, IC 6's B half-bridge output BOUT end and C8's negative end, CN 1's negative output OUT-end, negative detection resistance R12's the other end is connected, power module PM 1's output OUT end and power capacitor C9's positive end, circuit positive power source end Vcc end is connected, PM 1's ground terminal GND end ground connection, C9's negative terminal ground connection, C10's negative terminal ground connection.
All devices used by the invention, including the instrument operational amplifier IC1, the adjusting operational amplifier IC2, the damping operational amplifier IC3, the multiplier IC4, the feedback operational amplifier IC5, the PWM power amplifier IC6, the power module PM1 and the like, adopt the existing mature products and can be obtained through the market. For example: the instrument operational amplifier adopts AD623, the adjusting operational amplifier, the damping operational amplifier and the feedback operational amplifier adopt TLC2264, the multiplier adopts AD534, the PWM power amplifier adopts SA03, and the power supply module adopts a K78XX series DC/DC three-terminal high-efficiency voltage stabilizer and the like.
The main circuit parameters in the invention are matched as follows:
order: k is a radical of p For the regulator proportionality coefficient, τ i For the regulator integration time constant (unit: s), tau d Is a damping differential time constant (unit: s), R RP2 For adjusting the resistance (unit: omega) between the right end and the center end of the potentiometer RP2, R RP3 Is the resistance value (unit: omega) between the left end and the central end of the damping potentiometer RP3, V ref Is a reference voltage (note: output from the voltage-stabilizing terminal SF of the IC 4) (unit: V), U 0max Is the maximum average voltage (unit: V), U, output by the circuit smax For supply voltage U s The maximum value of (unit: V),
R1＝R2＝R7＝R8 (1)
C1＝C2＝C3 (2)
R12＝R13 (3)
R14＝R15 (4)
C5＝C6 (6)
R RP2 ＝100×10 3 /(k P -1) (7)
(R3+R5)C3＝τ i (8)
(R8+R9+R RP3 )C4＝τ d (9)
Figure BDA0003917640900000061
Figure BDA0003917640900000062
the working process of the invention is as follows:
(1) Before the circuit operates, the internal control or the external control is selected, wherein a selection switch K1 is used for instruction selection, and when the K1 is closed to an I end of an internal control end, an instruction signal u * Set by the central end of an instruction potentiometer RP1, when K1 closes the O end of the external control end, an instruction signal u * By external control instruction input end U of connecting piece CN1 * And (4) end input.
(2) The circuit of the invention utilizes the instrument operational amplifier IC1 as a deviation detection and proportion regulation unit, adopts the instrument operational amplifier as a deviation detection stage, can improve the static control precision of a power supply, and can set a required proportion coefficient k by setting the actual resistance value of the regulating potentiometer RP2 p As shown in the formula (7), the circuit mainly for regulating the operational amplifier IC2 is a PI regulating circuit for realizing a proportionality coefficient of 1, and the required integral time constant tau can be set by adjusting the capacitance of the integral capacitor C3 i As shown in formula (8).
(3) An incomplete differential circuit mainly comprising a damping operational amplifier IC3 is used as an internal feedback branch circuit to generate an electronic damping effect, and a differential time constant tau d As shown in equation (9), adjusting the damping potentiometer RP3 can set the desired τ d Value, τ d The larger the damping effect, the stronger the damping effect, so that the switch power supply can also stably work in no-load, the output voltage is stable, and in addition, tau d The value of (A) should be considered as the anti-interference effect.
(4) A multiplication/division circuit composed of a multiplier IC4 for amplifying the damping signal u output by the damping operational amplifier IC3 d As an inner loop feedback signal to compensate for system damping during light or no load, and on the other hand when the supply voltage U is s When the forward channel coefficient of the system is changed, the circuit can make the forward channel coefficient of the system change in inverse proportion, so as to automatically compensate the power supply voltage U in real time s Variable pair voltage-stabilized output voltage u 0 The influence of (c).
(5) Output control signal u of multiplier IC4 c As an analog quantity instruction of the PWM power amplifier IC6, the PWM power amplifier IC6 is internally provided with an H-bridge main circuit, and outputs PWM wave voltage u through an A half-bridge output end AOUT end and a B half-bridge output end BOUT end of the IC6 pwm One path is through PWM voltage output end U of connecting piece CN1 pwm The terminal and the negative output terminal OUT-terminal of CN1 output to drive the electric load and play the role of a power driver; the other path becomes a DC stabilized output voltage u after being filtered by L1 and C8 (ultra-low ESR capacitor) 0 And then the voltage is output to the direct current load for voltage stabilization and power supply through a positive output end OUT + end of the connecting piece CN1 and a negative output end OUT-end of the CNI.
(6) The output voltage feedback signal in the circuit is obtained by a differential proportional feedback circuit formed by a feedback operational amplifier IC 5.

Claims (2)

1. The utility model provides a novel switch drive power supply based on power supply feedforward and electronic damping, includes control and detection circuit, PWM converter output circuit, its characterized in that:
the control and detection circuit comprises an instrument operational amplifier IC1, an adjusting operational amplifier IC2, a damping operational amplifier IC3, a multiplier IC4, a feedback operational amplifier IC5, a selection switch K1, an instruction potentiometer RP1, an adjusting potentiometer RP2, a damping potentiometer RP3, an instruction resistor R1, a feedback resistor R2, a left integral resistor R3, a left divider resistor R4, a right integral resistor R5, a right divider resistor R6, a differential resistor R7, a left damping resistor R8, a right damping resistor R9, an upper feedforward resistor R10, a lower feedforward resistor R11, a negative detection resistor R12, a positive detection resistor R13, a positive resistor R14, a gain resistor R15, an instruction capacitor C1, a feedback capacitor C2, an integral capacitor C3, a differential capacitor C4, a positive end capacitor C5, a gain capacitor C6, a voltage stabilizing resistor of the instruction potentiometer RP1 and the multiplier IC4The end SF is connected, the lower end of the RP1 is grounded, the central end of the RP1 is connected with the end I of the internal control end of the selector switch K1, and the end O of the external control end of the K1 is connected with the input end U of the external control instruction of the connecting piece CN1 * The common end C of the K1 is connected with one end of a command resistor R1, the other end of the R1 is connected with one end of a command capacitor C1 and the positive input end IN + of an instrument operational amplifier IC1, the other end of the C1 is grounded, the negative input end IN-end of the IC1 is connected with one end of a feedback resistor R2 and one end of a feedback capacitor C2, the other end of the C2 is grounded, the gain resistor RG + end of the IC1 is connected with the left end and the center end of an adjusting potentiometer RP2, the gain resistor RG-end of the IC1 is connected with the right end of the RP2, the reference end REF end of the IC1 is grounded, the positive power source end Vcc end of the IC1 is connected with the positive power source end Vcc of the circuit, the ground end GND end of the IC1 is grounded, the output end OUT end of the IC1 is connected with one end of a left divider resistor R4, the other end of the R4 is connected with one end of a right resistor R6, the positive input end of the adjusting operational amplifier IC2 + end, and the other end of the R6 is grounded, the negative input end IN-end of the IC2 is connected with one end of a left integrating resistor R3 and one end of a right integrating resistor R5, the other end of the R3 is grounded, the other end of the R5 is connected with one end of an integrating capacitor C3, the other end of the C3 is connected with the output end OUT end of the IC2 and the bias negative end Z2 end of a multiplier IC4, the positive power end Vcc end of the IC2 is connected with the positive power end Vcc end of the circuit, the ground end GND end of the IC2 is grounded, the bias positive end Z1 end of the IC4 is connected with the output end OUT end of the damping operational amplifier IC3, the right end and the center end of a damping potentiometer RP3, the positive end X1 end of a multiplier X1 of the IC4 is connected with one end of an upper feedforward resistor R10 and one end of a lower feedforward resistor R11, the other end of the R11 is grounded, the negative end X2 end of the multiplier 1 of the IC4 is grounded, the multiplier Y1 end of the multiplier source end 4 is grounded, the multiplier Y1 end of the multiplier Y2 end of the multiplier IC4 is grounded, the multiplier Y2 end of the multiplier IC4 is connected with the output end OUT end of the output end of the PWM amplifier IC4, the positive power amplifier circuit Vcc end is connected with the positive power amplifier circuit, the ground end GND end of the IC4 is grounded, the other end of the R10 is connected with the main power supply end Us end of the IC6, the power supply end Us end of the connecting piece CN1, the positive end of the power supply capacitor C10 and the input end IN end of the power supply module PM1, the other end of the R2 is connected with one end of the differential capacitor C4, the output end OUT end of the feedback operational amplifier IC5, one end of the gain resistor R15 and one end of the gain capacitor C6, the other end of the C4 is connected with one end of the differential resistor R7 and the positive input end IN + end of the damping operational amplifier IC3The other end of the R7 is grounded, the negative input end IN-end of the IC3 is connected with one end of the left damping resistor R8 and one end of the right damping resistor R9, the other end of the R8 is grounded, the other end of the R9 is connected with the left end of the RP3, the positive power end Vcc end of the IC3 is connected with the positive power end Vcc end of the circuit, the ground end GND end of the IC3 is grounded, the positive input end IN + end of the IC5 is connected with one end of the positive detection resistor R13, one end of the positive end resistor R14 and one end of the positive end capacitor C5, the other ends of the R14 and the C5 are grounded, the negative input end IN-end of the IC5 is connected with one end of the negative detection resistor R12, the other end of the R15 and the other end of the C6, the positive power end Vcc end of the IC5 is connected with the positive power end Vcc end of the circuit, and the ground end GND end of the IC5 is grounded;
the PWM variable current output circuit comprises a PWM power amplifier IC6, a power module PM1, a connecting piece CN1, a current-limiting resistor R16, a protective resistor R17, a protective capacitor C7, an output capacitor C8, a power capacitor C9, a power supply capacitor C10 and an inductor L1, wherein a clock input end CLKIN end of the PWM power amplifier IC6 is connected with a clock output end CLKOUT end of the IC6, a positive power source end Vcc end of the IC6 is connected with a positive power source end Vcc end of the circuit, a ground end GND end of the IC6 is grounded, an A half-bridge current end IsenA end of the IC6 is connected with a B half-bridge current end IsenB end of the IC6, one end of the current-limiting resistor R16 and one end of the protective resistor R17, the other end of the R16 is grounded, the other end of the R17 is connected with a blocking end SHDN end of the IC6 and one end of the protective capacitor C7, the other end of the C7 is grounded, an A half-bridge output end AOUT end of the IC6 is connected with one end of the inductor L1, and a PWM voltage output end U1 of the CN1 PWM The other end of the L1 is connected with the positive end of an output capacitor C8, the positive output end OUT + end of the CN1 and the other end of a positive detection resistor R13, the output end BOUT end of a B half-bridge of the IC6 is connected with the negative end of the C8, the negative output end OUT-end of the CN1 and the other end of a negative detection resistor R12, the output end OUT end of the power module PM1 is connected with the positive end of a power capacitor C9 and the positive power source end Vcc end of a circuit, the ground end GND end of the PM1 is grounded, the negative end of the C9 is grounded, and the negative end of the C10 is grounded;
the selection switch K1 in the control and detection circuit is used for instruction selection, and when K1 is closed to the I end of the internal control end, the instruction signal u * Set by the central end of an instruction potentiometer RP1, when K1 closes the O end of the external control end, an instruction signal u * By external control instruction input end U of connecting piece CN1 * And (4) end input.
2. The novel switch driving power supply based on power supply feedforward and electronic damping as claimed in claim 1, wherein the circuit parameters are in the following fit relation:
R1＝R2＝R7＝R8 (1)
C1＝C2＝C3 (2)
R12＝R13 (3)
R14＝R15 (4)
C5＝C6 (6)
R RP2 ＝100×10 3 /(k P -1) (7)
(R3+R5)C3＝τ i (8)
(R8+R9+R RP3 )C4＝τ d (9)
Figure FDA0003917640890000031
Figure FDA0003917640890000032
wherein k is p For the regulator proportionality coefficient, τ i For adjusting the integration time constant, τ d To damp differential time constants, R RP2 For adjusting the resistance, R, between the right and central ends of the potentiometer RP2 RP3 Is the resistance value, V, between the left end and the center end of the damping potentiometer RP3 ref As reference voltage, U 0max : maximum average voltage, U, output by the circuit smax For a supply voltage U s Of (c) is calculated.
CN202211347237.8A 2022-10-31 2022-10-31 Novel switch driving power supply based on power supply feedforward and electronic damping Pending CN115603565A (en)

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