CN111030654A - Solid-state power controller - Google Patents

Solid-state power controller Download PDF

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Publication number
CN111030654A
CN111030654A CN201911200161.4A CN201911200161A CN111030654A CN 111030654 A CN111030654 A CN 111030654A CN 201911200161 A CN201911200161 A CN 201911200161A CN 111030654 A CN111030654 A CN 111030654A
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China
Prior art keywords
circuit
pmos pipe
utmost point
power controller
turn
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Pending
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CN201911200161.4A
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Chinese (zh)
Inventor
张洪建
赵建伟
司立宏
王磊
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Shandong Institute of Space Electronic Technology
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Shandong Institute of Space Electronic Technology
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Priority to CN201911200161.4A priority Critical patent/CN111030654A/en
Publication of CN111030654A publication Critical patent/CN111030654A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/284—Modifications for introducing a time delay before switching in field effect transistor switches

Abstract

The invention discloses a solid-state power controller, which comprises a PMOS (P-channel metal oxide semiconductor) tube, a digital logic circuit, a soft starter, a current acquisition circuit and a turn-off circuit, wherein a resistor R is connected to the g pole of the PMOS tube1A capacitor C is connected between the g pole and the s pole of the PMOS tubeMThe method is used for solving the problems of higher surge current when the capacitive load is switched on, higher voltage spike when the inductive load is switched off, higher voltage spike and oscillation when short-circuit protection is carried out and the like.

Description

Solid-state power controller
Technical Field
The invention relates to the technical field of power distribution control, in particular to a solid-state power controller.
Background
The Solid State Power Controller (SSPC) is an intelligent switch device integrating the switching function of a relay and the arc protection function of a circuit breaker as a core device of a solid state power distribution technology, is used for switching on and switching off a circuit, realizes circuit protection, receives a control signal of a front-stage computer and reports state information (including load voltage and current), is similar to a traditional mechanical automatic thermal switch, a combined device formed by connecting a fuse and the relay in series and other control protectors in function, has performance greatly superior to a traditional device, can rapidly switch on and switch off the circuit, does not generate an arc, has no movable parts inside, has no mechanical abrasion, has low failure rate and high reliability; during overload, the electric load equipment and the line are protected according to inverse time limit characteristic tripping.
However, at high power (> 200W), the solid state power controller has the following problems: (1) du/dt in the switching-on process can generate higher surge current when capacitive load is carried, di/dt in the switching-off process is higher, and higher voltage peak can generate when inductive load is carried; (2) high voltage spikes and oscillations occur during short-circuit protection.
Accordingly, the invention is particularly directed to.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a solid-state power controller which is used for solving the problems of higher surge current when a capacitive load is switched on, higher voltage spike when an inductive load is switched off, higher voltage spike and oscillation when short-circuit protection is carried out and the like.
The technical scheme of the invention is realized as follows:
the utility model provides a solid-state power controller, including the PMOS pipe, still include digital logic circuit, soft starter, current acquisition circuit and turn-off circuit, the s utmost point of PMOS pipe is used for connecting power input, the d utmost point of PMOS pipe is power output end, be used for connecting the load, digital logic circuit is used for connecting external instruction, and be connected with soft starter, soft starter is connected with the g utmost point of PMOS pipe, current acquisition circuit connects in the d utmost point of PMOS pipe, and be connected with turn-off circuit, turn-off circuit is connected with the g utmost point of PMOS pipe, at the g utmost point connecting resistance R of PMOS pipe1A capacitor C is connected between the g pole and the s pole of the PMOS tubeM。
Further, 90 Ω < R1 < 120 Ω, CM＞104F。
Further, when the short circuit occurs, the g-pole voltage of the PMOS tube is immediately turned off, and the turn-off time is 50 microseconds.
Further, a damping resistor R2Ground, R2＞2√(L2/C1)，L2Is an equivalent inductance between the power input terminal and the power output terminal, C1Is equivalent of power input end to groundAnd (4) a capacitor.
The invention has the beneficial effects that:
(1) by increasing R1And CMThe problems of high surge current when a capacitive load is switched on and high voltage spike when an inductive load is switched off are solved, wherein R1 is more than 90 omega and is more than 120 omega, and CMThe solid state power controller of the present invention is suitable for 160V/200A scenarios > 104F.
(2) The problem of oscillation during short-circuit protection is solved by setting a damping resistor R2 and by immediately turning off the g-pole voltage of the PMOS tube during short-circuit with the turn-off time of 50 mus, the high voltage spike during short-circuit protection is solved.
Drawings
FIG. 1 is a schematic diagram of a 160V/200A solid state power controller.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application.
The first embodiment is as follows:
the utility model provides a 160V/200A solid-state power controller, including the PMOS pipe, still include digital logic circuit, soft starter, current acquisition circuit and turn-off circuit, the s utmost point of PMOS pipe is used for connecting power input, the d utmost point of PMOS pipe is power output end, be used for connecting the load, digital logic circuit is used for connecting external instruction, and be connected with soft starter, soft starter is connected with the g utmost point of PMOS pipe, be used for providing the g utmost point voltage of PMOS pipe, current acquisition circuit connects the d utmost point of PMOS pipe, and with turn-off circuit connection, turn-off circuit is connected with the g utmost point of PMOS pipe, turn-off the PMOS pipe when being used for short circuit, overload the condition.
The present embodiment improves the solid state power controller as follows:
as shown in FIG. 1, a resistor R is connected to the g-pole of the PMOS transistor1A capacitor C is connected between the g pole and the s pole of the PMOS tubeM. Rated voltage V of power input end under 160V/200A conditionDC160V, 5.75V for the Miller plateau voltage Vplate of the PMOS tube, and the g-pole drive voltage V of the PMOS tubeCC15V, rate of change of voltage dV of load at turn-onLOADDt, load voltage rise voltage triseThe calculation formula of (a) is as follows:
Figure BDA0002295665230000031
Figure BDA0002295665230000032
voltage change rate dV of load with inductive load at turn-offLOAD(dt), rate of change of current di/dt, load voltage rise voltage tfallThe calculation formula of (a) is as follows:
Figure BDA0002295665230000033
Figure BDA0002295665230000034
Figure BDA0002295665230000035
as can be seen from the formulas (1) and (2), by increasing R1And CMCan reduce dVLOADDt and extending trise. L in the formula (4) is the inductance of the inductive load, and as can be seen from the formulas (4) and (5), by increasing R1And CMThe di/dt can be reduced and t can be prolongedfall. In this example, 90 Ω < R1 < 120 Ω, CM> 104F for 160V/200A.
The present embodiment also improves the solid state power controller as follows:
in the short circuit, the g-pole voltage of the PMOS tube is immediately switched off to limit the peak value of the short-circuit current, reduce the variable di of the current in the switching-off process, prolong the switching-off time by 50 mus, and reduce the di/dt in the switching-off process by reducing the variable di of the current in the switching-off process, thereby effectively inhibiting the voltage spike in the switching-off process.
As shown in fig. 1, the power input terminal passes through a damping resistor R2Grounded through a damping resistor R2Suppression of short-circuit protection oscillations, R2The following conditions need to be satisfied:
Figure BDA0002295665230000041
in the formula (6), L2Is an equivalent inductance between the power input terminal and the power output terminal, C1For equivalent capacitance from power input end to ground, L in short-circuit protection of solid state power controller in prior art2And C1The capacitor is charged and discharged continuously, so that oscillation is caused, and the oscillation can be suppressed through the damping resistor R1.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. The utility model provides a solid-state power controller, including the PMOS pipe, still include digital logic circuit, soft starter, current acquisition circuit and turn-off circuit, the s utmost point of PMOS pipe is used for connecting power input, the d utmost point of PMOS pipe is power output end, be used for connecting the load, digital logic circuit is used for connecting external instruction, and be connected with soft starter, soft starter is connected with the g utmost point of PMOS pipe, current acquisition circuit connects in the d utmost point of PMOS pipe, and with turn-off circuit connection, turn-off circuit is connected with the g utmost point of PMOS pipe, the utility model is characterized in that, at the g utmost point connecting resistance R of PMOS pipe1A capacitor C is connected between the g pole and the s pole of the PMOS tubeM。
2. The method of claim 1A solid state power controller is characterized in that R1 is more than 90 omega and less than 120 omega, CM＞104F。
3. The solid state power controller of claim 1, wherein the g-voltage of the PMOS transistor is turned off immediately at the time of the short circuit, and the turn-off time is 50 μ s.
4. The solid state power controller of claim 1, wherein the damping resistor R2Ground, R2＞2√(L2/C1)，L2Is an equivalent inductance between the power input terminal and the power output terminal, C1Is the equivalent capacitance of the power input to ground.
CN201911200161.4A 2019-11-29 2019-11-29 Solid-state power controller Pending CN111030654A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112117736A (en) * 2020-08-19 2020-12-22 山东航天电子技术研究所 Solid state power controller
CN112886545A (en) * 2021-02-02 2021-06-01 北京市科通电子继电器总厂有限公司 Driving circuit with short-circuit protection function suitable for high-voltage solid-state power controller

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CN109698611A (en) * 2019-01-23 2019-04-30 东南大学 Multistage drop grid voltage type SiC-MOSFET driving circuit
CN209545129U (en) * 2019-04-02 2019-10-25 深圳市嘉昱机电有限公司 A kind of short-circuit protection circuit

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JP2000231845A (en) * 1999-02-12 2000-08-22 Yazaki Corp Switch device using switching circuit with current vibration type interruption function
US20100013541A1 (en) * 2008-07-21 2010-01-21 Balboni Edmund J Method and apparatus for a dynamically self-bootstrapped switch
CN201975764U (en) * 2010-04-28 2011-09-14 上海力申科学仪器有限公司 Frequency converter load short circuit protection circuit for centrifugal machine
EP2388917A2 (en) * 2010-05-19 2011-11-23 Hamilton Sundstrand Corporation SSPC for soft start of d.c. link capacitor
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CN106059321A (en) * 2016-06-06 2016-10-26 哈尔滨工业大学 MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) high-frequency driver adopting adaptive resonance network
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112117736A (en) * 2020-08-19 2020-12-22 山东航天电子技术研究所 Solid state power controller
CN112117736B (en) * 2020-08-19 2022-04-15 山东航天电子技术研究所 Solid state power controller
CN112886545A (en) * 2021-02-02 2021-06-01 北京市科通电子继电器总厂有限公司 Driving circuit with short-circuit protection function suitable for high-voltage solid-state power controller
CN112886545B (en) * 2021-02-02 2022-02-22 北京市科通电子继电器总厂有限公司 Driving circuit with short-circuit protection function suitable for high-voltage solid-state power controller

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Application publication date: 20200417