CN106786814B - A kind of leadage circuit - Google Patents

A kind of leadage circuit Download PDF

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Publication number
CN106786814B
CN106786814B CN201710032785.4A CN201710032785A CN106786814B CN 106786814 B CN106786814 B CN 106786814B CN 201710032785 A CN201710032785 A CN 201710032785A CN 106786814 B CN106786814 B CN 106786814B
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China
Prior art keywords
circuit
modulation chip
adjustment module
connect
resistance
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CN201710032785.4A
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CN106786814A (en
Inventor
秦健强
李强
林建琳
姚庭
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Weihai Newbeiyang Zhengqi Robot Co Ltd
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Weihai Newbeiyang Zhengqi Robot Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00Circuit arrangements for transfer of electric power between ac networks and dc networks

Abstract

The embodiment of the present invention provides a kind of leadage circuit, is related to electronic technology field.The leadage circuit includes the first conditioning circuit, duty cycle adjustment module, frequency adjustment module, modulates chip and module of releasing, first conditioning circuit, duty cycle adjustment module, frequency adjustment module and module of releasing are connect with modulation chip, and duty cycle adjustment module and frequency adjustment module are also connect with the first conditioning circuit.Whether exceed over-voltage setting value by the voltage that the first conditioning circuit detects power supply, and it controls modulation chip and generates pwm signal, duty cycle adjustment module and frequency adjustment module exceed the size of over-voltage setting value according to the voltage of power supply, adjust separately the duty ratio and frequency of the pwm signal of modulation chip output, the working time for further realizing module of releasing achievees the purpose that release to the electric energy of power supply.It can not have to the resource and software resource that occupy MCU, it is time saving and energy saving, and bleeder resistance is conducting when releasing electric energy, reduces the unnecessary fever of device.

Description

A kind of leadage circuit
Technical field
The present invention relates to electronic technology fields, in particular to a kind of leadage circuit.
Background technique
Currently, overtension of the people for bus, the settling mode of use is using leadage circuit, and leadage circuit is event Meaning consumption part energy converts thereof into the circuit of heat or other forms energy.There are two types of realization sides for traditional leadage circuit Formula: mode one, by hardware realization, after reaching over-voltage setting value by part control conditioning circuit detection DC bus, straight Stream busbar voltage is directly connected on bleeder resistance, is consumed energy by bleeder resistance;There are also what base chip controls when using were realized to release Circuit, but the speed for electric energy of releasing is certain, not smart enough.Mode two, by software realization, MCU constantly detects bus electricity Pressure, the frequency released by software control, intelligent, but software function is realized than relatively time-consuming, and wastes MCU money Source.
Summary of the invention
In view of this, the embodiment of the present invention is designed to provide a kind of leadage circuit, to improve releasing for the prior art The speed of circuit waste of resource, time-consuming and electric energy of releasing is certain, problem not smart enough.
A kind of leadage circuit provided in an embodiment of the present invention is released applied to voltage is carried out to power supply, including the first conditioning Circuit, frequency adjustment module, modulates chip and module of releasing at duty cycle adjustment module, and first conditioning circuit described accounts for Sky is connect with the modulation chip than adjustment module, the frequency adjustment module and the module of releasing, the duty ratio Adjustment module and the frequency adjustment module are also connect with first conditioning circuit;First conditioning circuit is for detecting institute Stating power supply, whether over-voltage controls the modulation when the voltage of the power supply is more than the first conditioning circuit over-voltage setting value Chip generates pulse;The duty cycle adjustment module is used to adjust the duty ratio of the output pulse of the modulation chip;The frequency Rate adjustment module is used to adjust the frequency of the output pulse of the modulation chip;The modulation chip is for issuing pulse width tune Signal processed, module of releasing described in control carry out voltage to the power supply and release.
Compared with prior art, a kind of leadage circuit of the invention, including the first conditioning circuit, duty cycle adjustment module, Frequency adjustment module modulates chip and module of releasing, first conditioning circuit, the duty cycle adjustment module, the frequency Rate adjustment module and the module of releasing are connect with the modulation chip, the duty cycle adjustment module and the frequency tune Section module is also connect with first conditioning circuit.Whether exceed over-voltage setting by the voltage that the first conditioning circuit detects power supply Value, and control modulation chip and generate pwm signal, duty cycle adjustment module and frequency adjustment module can be super according to the voltage of power supply The size of over-voltage setting value out adjusts separately the duty ratio and frequency of the pwm signal of modulation chip output, further realizes and release The working time of module achievees the purpose that release to the electric energy of power supply.It can not have to the resource and software resource that occupy MCU, save Shi Shengli, and bleeder resistance is conducting when releasing electric energy, reduces the unnecessary fever of device, the time of releasing can It adjusts, more intelligently.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the block diagram for the leadage circuit that present pre-ferred embodiments provide.
Fig. 2 is the structural schematic diagram for the power supply that present pre-ferred embodiments provide.
Fig. 3 is the circuit diagram for the leadage circuit that present pre-ferred embodiments provide.
Fig. 4 is the circuit diagram for the module of releasing that present pre-ferred embodiments provide.
Icon: 10- leadage circuit;20- power supply;21- ac output end;22- rectification circuit;23- DC bus;100- One conditioning circuit;200- duty cycle adjustment module;201- range conditioning circuit;The first variable resistance of R1-;R2- second can power transformation Resistance;300- frequency adjustment module;The second conditioning circuit of 301-;302- analog switching circuit;C1- capacitor;400- modulates chip; GND- grounding pin;TRIG- triggers pin;Q- output pin;R- reset pin;CVOLT- controls voltage pin;THR- threshold Pin;DIS- discharges load prongs;VCC- energization pins;500- releases module;R0- bleeder resistance;600- push-pull output circuit.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects It encloses.
Referring to FIG. 1, being the block diagram for the leadage circuit 10 that present pre-ferred embodiments provide.The present invention provides one Kind leadage circuit 10, in 20 over-voltage of power supply, extra voltage to be converted to thermal energy or other energy.Of the invention releases Circuit 10 includes the first conditioning circuit 100, duty cycle adjustment module 200, frequency adjustment module 300, modulation chip 400 and lets out Amplification module 500, first conditioning circuit 100, the duty cycle adjustment module 200, the frequency adjustment module 300 and institute It states module 500 of releasing to connect with the modulation chip 400, the duty cycle adjustment module 200 and the frequency adjustment module 300 also connect with first conditioning circuit 100.
First conditioning circuit 100 for detect the power supply 20 whether over-voltage, first conditioning circuit 100 is default There is over-voltage setting value, it is described when the first conditioning circuit 100 detects the voltage of the power supply 20 more than the over-voltage setting value First conditioning circuit 100 controls the modulation chip 400 and generates pulse.Meanwhile first electricity that can will test of conditioning circuit 100 Pressure is sent to duty cycle adjustment module 200 and the frequency adjustment module 300 beyond the size of over-voltage setting value, realizes duty ratio Adjustment module 200 and the frequency adjustment module 300 exchange the adjusting of the duty when frequency of the pulse of the output of coremaking piece 400.
The modulation chip 400 modulates (Pulse Width Modulation, PWM) signal for issuing pulse width, Module of releasing described in control 500 carries out voltage to the power supply 20 and releases.The modulation chip 400 includes grounding pin GND, touching Carry out the coffin upon burial foot TRIG, output pin Q, reset pin R, control voltage pin CVOLT, threshold pin THR, discharge load prongs DIS And energization pins VCC.
2 are please referred to, is the structural schematic diagram for the power supply 20 that present pre-ferred embodiments provide.The power supply 20 of the present embodiment wraps Include ac output end 21, rectification circuit 22 and DC bus 23.Described in the alternating current that the ac output end 21 exports passes through Rectification circuit 22 is rectified into direct current, and provides electric energy by the DC bus 23 for load.The DC bus 23 includes just To input terminal VP and negative input VN, external load generally accesses the positive input VP and negative input VN.
As shown in figure 3, being the circuit diagram for the leadage circuit 10 that present pre-ferred embodiments provide.It please refers to Fig. 3 and combines With reference to Fig. 1, first conditioning circuit 100 is connect with the positive input VP of the DC bus 23 and negative input VN, To detect whether the voltage of DC bus 23 exceeds over-voltage setting value.First conditioning circuit 100 also with the modulation chip 400 reset pin R connection generates pwm signal for controlling the modulation chip 400.
The duty cycle adjustment module 200 includes range conditioning circuit 201, the first variable resistance R1 and the second adjustable resistance R2, the range conditioning circuit 201 connect with first conditioning circuit 100 respectively, the first variable resistance R1 and institute State the second adjustable resistance R2 connection, the first variable resistance R1 is also connect with the second adjustable resistance R2, it is described discharge it is negative Pin DIS is carried to be connected between the first variable resistance R1 and the second adjustable resistance R2.
Leadage circuit 10 further includes diode D1, and the anode of the diode D1 is connect with the load prongs DIS that discharges, The cathode of the diode D1 is connect with the threshold pin THR, and the diode D1 is for preventing the modulation chip 400 defeated Pulse width modulating signal duty ratio out is excessive.
The range conditioning circuit 201 can exceed first conditioning circuit according to the voltage of the DC bus 23 The size of 100 over-voltage setting values adjusts the first variable resistance R1 and the second adjustable resistance R2, the modulation chip 400 can adjust the pwm signal of output according to the resistance value size of the first variable resistance R1 and the second adjustable resistance R2 Duty ratio.The voltage of the DC bus 23 is higher, and the range conditioning circuit 201 is by adjusting first variable resistance The duty ratio for the pwm signal that the R1 and the second adjustable resistance R2 exports the modulation chip 400 is bigger.
The frequency adjustment module 300 include sequentially connected second conditioning circuit 301, analog switching circuit 302 and Capacitor C1, the capacitor C1 are connect with the triggering pin TRIG and the threshold pin THR respectively, the capacitor C1 also with it is negative To input terminal VN connection, needing to mention is, in the present embodiment, the level with reference to ground is identical as the level of negative input VN, therefore Negative input VN is accessed that is, accessing the reference ground of circuit board.
Second conditioning circuit 301 is used to set according to the voltage of the power supply 20 beyond 100 over-voltage of the first conditioning circuit The size of definite value, Xiang Suoshu analog switching circuit 302 issue different control signals, and the analog switching circuit 302 is according to institute The control signal for stating the second conditioning circuit 301 controls the capacitance of the capacitor C1, and the modulation chip 400 is also used to according to described in The capacitance of capacitor C1 controls the frequency of the pwm signal of output.
By duty cycle adjustment module 200 to the duty cycle adjustment of pwm signal, PWM is believed by frequency adjustment module 300 Number frequency adjust, to change the pwm signal of output, and then adjust the working time of module 500 of releasing, reach female according to direct current The voltage of line 23, control module 500 of releasing are released time of electric energy, simple, intelligence.
The energization pins VCC is connect with the power supply 20 that voltage is+15V, for providing work to the modulation chip 400 Voltage, the power supply 20 of+15V are connect with negative input VN again after connecting with capacitor C3, and capacitor C3 is for filtering.The grounding lead Foot GND is connect with negative input VN, that is, grounding pin GND is grounded, the control voltage pin CVOLT connection capacitor It is connect after C2 with negative input VN.
The leadage circuit 10 further includes push-pull output circuit 600, the push-pull output circuit 600 and the modulation chip 400 output pin Q connection, the push-pull output circuit 600 include output end GZ, the output end GZ and the module of releasing 500 connections.
The push-pull output circuit 600 includes NPN type triode Q2 and PNP type triode Q3, the NPN type triode Q2 Base stage and PNP type triode Q3 base stage connection after connect with output pin Q, the collector of NPN type triode Q2 company It is connected to the power supply 20 of+15V, the emitter of the NPN type triode Q2 is connect with the collector of PNP type triode Q3, the PNP The emitter of type triode Q3 is connect with negative input VN, and output end GZ is connected to the emitter of the NPN type triode Q2 Between the collector of PNP type triode Q3.
The output pin Q by connection resistance R3 after, then with three pole of the base stage of the NPN type triode Q2 and positive-negative-positive The base stage of pipe Q3 connects, and the resistance R3 is used for current limliting.The power supply 20 of+15V is connected with resistance R4, the other end of resistance R4 It is connected between output pin Q and resistance R3, resistance R4 is for dividing.One end of capacitor C4 is also connected to output pin Q and electricity It hinders between R3, the other end of capacitor C4 accesses negative input VN, and capacitor C4 is for filtering.
When output pin Q output is low level, the output end GZ exports low level, as the output pin Q Export high level when, the output end GZ exports high level, but the pwm signal of output end GZ output is stronger, i.e. institute The driving capability of pwm signal can be increased by stating push-pull output circuit 600.
Referring to FIG. 4, being the circuit diagram for the module 500 of releasing that present pre-ferred embodiments provide.The module 500 of releasing The positive of bleeder resistance R0 and switch including series connection, one end of the bleeder resistance R0 and the DC bus 23 inputs VP connection is held, one end of the switch is connect with the negative input VN of the DC bus 23.
In the present embodiment, the switch is NMOS tube Q1, and certainly in other specific embodiments, the switch can be with For other, such as PMOS tube, triode, photoelectrical coupler etc..
Capacitor C6, the capacitance that the capacitor C6 is are connected between the positive input VP and the negative input VN It is generally large, for storing electric energy, it can also be that multiple capacitor combinations form.The source electrode and negative input of the NMOS tube Q1 VN connection, the drain electrode of the NMOS tube Q1 are connect with the bleeder resistance R0, and the grid and output end GZ of the NMOS tube Q1 connects It connects.
The module 500 of releasing further includes diode D2, resistance R5, resistance R6 and capacitor C5, and the cathode of diode D2 connects It is connected between the positive input VP and bleeder resistance R0, the anode of diode D2 is connected to bleeder resistance R0 and NMOS tube Q1 Drain electrode between.Since general bleeder resistance R0 is noninductive resistance, when bleeder resistance R0 misconnection is inductive resistance, two pole Pipe D2 can play the role of electric energy of releasing.One end of resistance R5 is connect with output end GZ, the other end and NMOS tube of resistance R5 The grid of Q1 connects.One end of resistance R6 is connected between resistance R5 and the grid of NMOS tube Q1, the other end of resistance R6 with The source electrode of NMOS tube Q1 connects.One end of capacitor C5 is connected between the grid of NMOS tube Q1 and the resistance R6, capacitor C5's The other end is connected between the source electrode of NMOS tube Q1 and the resistance R6.The resistance R5 is used for current limliting, capacitor C5 and resistance R6 For filtering.
When the output end GZ exports high level, the source electrode and drain electrode conducting of the NMOS tube Q1, electric current can be from just Negative input VN is flow to by NMOS tube Q1 again after bleeder resistance R0 to input terminal VP, so that bleeder resistance R0 access is straight The both ends of bus 23 are flowed, bleeder resistance R0 carries out releasing for electric energy by way of fever.When output end GZ exports low level, The NMOS tube Q1 is not turned on, and electric current cannot be flow to by NMOS tube Q1 after bleeder resistance R0 negative again from positive input VP To input terminal VN, bleeder resistance R0 can not access the progress electric energy of DC bus 23 and release.The pwm signal that chip 400 exports is modulated, After push-pull output enhances, module 500 of releasing is flowed into from output end GZ.
In this way, output end GZ output may be implemented using the duty ratio and frequency for adjusting pwm signal in the embodiment of the present invention Signal further reaches the time of control NMOS tube Q1 conducting.For example, the voltage of DC bus 23 is also high, modulation chip 400 is defeated The duty ratio of the high level of pwm signal out is higher, frequency is faster, and the time of NMOS tube Q1 conducting also increases, bleeder resistance R0 Can release more electric energy.
In conclusion the present invention provides a kind of leadage circuit, including the first conditioning circuit, duty cycle adjustment module, frequency Adjustment module modulates chip and module of releasing, and whether exceeds over-voltage by the voltage that the first conditioning circuit detects DC bus Setting value, and control modulation chip and generate pwm signal, duty cycle adjustment module and frequency adjustment module can be according to DC bus Voltage exceed over-voltage setting value size, adjust separately modulation chip output pwm signal duty ratio and frequency, further The working time for realizing module of releasing, achieve the purpose that release to the electric energy of DC bus.Can not have to occupy MCU resource and Software resource, it is time saving and energy saving, and bleeder resistance is conducting when releasing electric energy, reduces the unnecessary hair of device Heat, the time of releasing is adjustable, more intelligently.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "left", "right", "inner", "outside" Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention. In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively important Property.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one Connect to body;It can be mechanical connection, be also possible to be electrically connected;It can be directly connected, it can also be indirect by intermediary It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition State the concrete meaning of term in the present invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. a kind of leadage circuit is released applied to voltage is carried out to power supply, which is characterized in that including the first conditioning circuit, duty Than adjustment module, frequency adjustment module, modulate chip and module of releasing, the duty cycle adjustment module includes range conditioning electricity Road, the first variable resistance and the second adjustable resistance, first conditioning circuit, the frequency adjustment module and the mould of releasing Block is connect with the modulation chip, and the range conditioning circuit is connect with first conditioning circuit, described first can power transformation Resistance and the second adjustable resistance connection, first variable resistance are also connect with the second adjustable resistance, the modulation Chip is connected between first variable resistance and the second adjustable resistance;
First conditioning circuit for detect the power supply whether over-voltage, the power supply voltage be more than it is described first conditioning When circuit over-voltage setting value, controls the modulation chip and generate pulse;The range conditioning circuit is used for according to the power supply Voltage exceeds the size of the first conditioning circuit over-voltage setting value, and adjusting first variable resistance and described second can power transformation Resistance, and then adjust the duty ratio of the output pulse of the modulation chip;The frequency adjustment module is for adjusting the modulation core The frequency of the output pulse of piece;The modulation chip is for issuing pulse width modulating signal, and module of releasing described in control is to institute Power supply progress voltage is stated to release.
2. leadage circuit according to claim 1, which is characterized in that the modulation chip includes discharging load prongs, institute It states and discharges load prongs and be connected between first variable resistance and the second adjustable resistance;
The modulation chip is also used to defeated according to the big minor adjustment of resistance value of first variable resistance and the second adjustable resistance The duty ratio of pulse width modulating signal out.
3. leadage circuit according to claim 2, which is characterized in that the frequency adjustment module includes sequentially connected Two conditioning circuits, analog switching circuit and capacitor, the modulation chip further include triggering pin, threshold pin, the capacitor It is connect respectively with the triggering pin and the threshold pin;
Second conditioning circuit is used for the voltage according to the power supply beyond the big of the first conditioning circuit over-voltage setting value Small, Xiang Suoshu analog switching circuit issues different control signals, and the analog switching circuit is according to second conditioning circuit Control signal control the capacitance of the capacitor, the modulation chip is also used to control output according to the capacitance of the capacitor The frequency of pulse width modulating signal.
4. leadage circuit according to claim 3, which is characterized in that the leadage circuit further includes diode, and described two The anode of pole pipe is connect with the load prongs that discharge, and the cathode of the diode is connect with the threshold pin, two pole Pulse width modulating signal duty ratio of the pipe for preventing the modulation chip from exporting is excessive.
5. leadage circuit according to claim 1, which is characterized in that it further include push-pull output circuit, the push-pull output Circuit with it is described modulation chip output pin connect, the push-pull output circuit includes output end, the output end with it is described Module of releasing connection.
6. leadage circuit according to claim 1, which is characterized in that the power supply includes sequentially connected exchange output End, rectification circuit and DC bus, the alternating current of the ac output end output are direct current by the rectifier circuit rectifies Electricity, and be load supplying by the DC bus.
7. leadage circuit according to claim 6, which is characterized in that the module of releasing includes the vent discharge being connected in series Resistance and switch, one end of the bleeder resistance are connect with the positive input of the DC bus, one end of the switch and institute State the negative input connection of DC bus.
8. leadage circuit according to claim 7, which is characterized in that the switch is NMOS tube, the source of the NMOS tube Pole is connect with the negative input of the DC bus, and the drain electrode of the NMOS tube is connect with the bleeder resistance, the NMOS The grid of pipe is connect with the modulation chip.
9. leadage circuit according to claim 1, which is characterized in that the modulation chip further includes reset pin, described Reset pin is connect with first conditioning circuit, and first conditioning circuit is by the reset pin to the modulation chip Control signal is issued, the modulation chip is controlled and generates pulse width modulating signal.
10. leadage circuit according to claim 1, which is characterized in that the modulation chip further includes energization pins, ground connection Pin and control voltage pin, the energization pins are for accessing power supply, the grounding pin ground connection, the control electricity Pin is pressed to pass through a capacity earth.
CN201710032785.4A 2017-01-16 2017-01-16 A kind of leadage circuit Active CN106786814B (en)

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US10282975B2 (en) * 2017-08-08 2019-05-07 Microchip Technology Incorporated Carbon monoxide alarm supervision
CN110460272A (en) * 2019-09-16 2019-11-15 江苏科技大学 High power permanent magnet synchronous motor energy bleeder and control method
CN110880748B (en) * 2019-10-08 2021-12-07 布法罗机器人科技(成都)有限公司 Multi-motor back electromotive force discharge system for rehabilitation robot

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CN105262055A (en) * 2015-08-31 2016-01-20 国网河南省电力公司电力科学研究院 Overcurrent protection circuit with adjustable intermittent time
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