TW201106598A - Power control circuit with wire compensation and wire compensation method of the same - Google Patents

Abstract

A power control circuit with wire compensation ability is provided. The power control circuit is applied to a power converter, which has an output coupled to a load through a wire. The power control circuit has a feedback circuit, a controller, and a compensation resistor. The feedback circuit is utilized for detecting an output voltage of the power converter to generate a feedback signal. The controller adjusts the level of the output voltage according to the feedback signal. The compensation resistor and the wire compose a power loop. The compensation resistor and the feedback circuit compose a feedback loop. The compensation resistor is utilized to enhance the level of the feedback signal according to the current on the wire.

Description

201106598 VI. Description of the invention: [Technical field to which the invention pertains] The road 'is especially a power supply line line loss, and the present invention relates to a power supply control circuit for a power supply control electric compensation function. [Prior Art] Typical Buck Power Rate Converter (Buck Converter)

^ This power converter 1 () is _ _ $ is the ring _ V. The potential, drop | 30 ° teach circuit 12 and - controller 14. Back to m奂 there is a secondary power voltage converter 1〇 output electrical connection: after the control; 14,. The controller 14 adjusts the output power repeatedly according to the received power status of the paste, because the harmful line 4 is present on the power supply line 20: Ray R Di 2 ^ 2 . Provided to the load 30, in the resistance: on the electricity

(Vv^RW*|0) ' causes the actual supply to the load 3〇H to be lower than the output voltage v〇 of the buck power converter 1〇. , electric-blood ίΐΓίΪ wire loss caused by 2G, please refer to Figure 2, (1), the method is another connection - wire & to load 3 〇, remote _ (Remote Sense) supply voltage to the load v _ ,system. The wire 22 in the figure is the direct detection load 3〇 5^^丁=subscription feedback control. This compensation method can compensate for the - half of the power supply ^. However, this remote detection method requires additional connection to the load 30 for detection, which leads to an increase in cost. Also, as the supply distance increases, the length of the wire 22 to be used also increases. [Invention] In view of the above problems, the object of the present invention is to provide a power supply control circuit with a power supply line loss 201106598, which does not need to use a wire to detect the line loss caused by the lightning line of the load end to provide an accurate load. Electricity I. First, the circuit. The Wei control circuit is used for the power = circuit including - feedback circuit, - controller and - compensation resistor. , ^ power supply ^ electricity ^ used to make the power converter - output power repeatedly, to generate the system f according to the feedback signal adjustment power converter output power L cover 1% for the line constitute - power f circuit, and with ϊ Back to #4 road composition - _ electric _ road, turn high _ the potential of the job. Electricity Invented and provided a method of compensating for the power supply line system. ,wire. The power converter is supplied through this power supply line ^: ’ Depending on the resistance value of the power supply line, the slave-compensation resistor. ί i i : 接 ί ί ί , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The above summary and the following detailed description are exemplary in nature and are illustrative of the scope of the invention. Other advantages of the fish of the present invention will be explained in the following description and illustration. , and its purpose and [implementation] / ~ The spirit of the present invention is to lightly connect a compensation resistor to the power supply line, and use this to replace the potential of the voltage drop pad high feedback signal to compensate the line of the power supply line ^ This is a schematic diagram of the power supply control circuit 2 of the present invention having a power supply line compensation function. The power control circuit 200 is applied to the power unit 100' to control the output of the power converter lake. The power-output voltage Vo of the power converter 00 is supplied to a load through a power supply line 2, as shown in the figure. The power control circuit 200 includes a feedback circuit 220, a controller 240, and a compensation circuit. Resistor R3. The feedback circuit 22 is used to detect the voltage ν 轮 of the power converter 100 to generate a feedback signal V. The feedback signal VfM is transmitted to one of the controllers 24 and is fed back to the control terminal FB. Control 201106598 =0 system, feedback signal Vfb (four) power conversion cycle (dutycyde), to adjust the power to the output voltage Vo potential. The noon transition state 100 compensating resistor R3 - the first end N1 is connected to and the circuit 220 is constructed - the feedback circuit is back, and not). The second end N2 of one of the compensation resistors R3 is coupled to the imaginary line of the imaginary line. The power supply line 20 constitutes a power supply circuit (electrical, 2〇' and

One of the grounding ends (4) of the controller (10) is ‘to ^^^ header^ ticket two. And the ground terminal GND of the controller 240 is simultaneously connected to a power supply circuit between the terminals and the power supply line 20. By ^ ^ and = and = the current value on the wire 20, and according to the potential of this === vfb, to achieve the purpose of compensating the power line 2 line loss. Another a 唬 ΐ ΐ ΐ ΪΪΓΙ ' feedback circuit 220 is a two-divider circuit. The piezoelectricity of the power supply coupled to the power converter 100 is connected to the controller 240 to output a feedback signal Vfb.

That is, as shown in the figure, the voltage dividing circuit 22 can be constituted by a second = 2. Wherein, the first end of the first _R1 is connected to the power supply terminal 0, and the other end is connected to the contact with the second resistor R2 to output the feedback signal Vfb. The compensation resistor r3 is connected in series to the potential of the _th number Vfb. A to the brother of a resistor to take 'two times to listen to the tape: ^! rate converter _ can be any kind of need to feedback control rate, benefit, for example: buck (buck) power converter, Step-up, flyback (flybaGk) power converters, etc. The following is an example of a wealth reduction converter - the present invention. Jingming has a schematic diagram of a preferred embodiment of a power converter 3 (8) for Wei Wei Wei. In the figure, the buck power conversion H 3QQ is transmitted through the power supply line 2. The buck power converter 300 includes a switch Q, an inductor L, a capacitor, and a capacitor D. 201106598 ‘,,,, When the output voltage is too low, the switch Q is turned on and the bucket is v〇; the potential of the voltage is high. When the turn-up voltage feedback circuit 420 has a first resistor R1 and a first resistor R1 connected in series to the second resistor R2 to form a divided voltage 2 3:20 high potential end is connected to the power converter ^ί; ^:ou; ° ^420

...the contact between the resistor R1 and the second resistor R2 is the J N2 terminal... the second resistor 系, and the second terminal is the ground terminal _. For a feedback circuit formed by a sub-fourth circuit 42 〇 resistor R3, the voltage drop generated by the compensation resistor 可用 can be used to raise the potential of the feedback signal Vfb. Secondly, the second terminal N2 of the compensation resistor R3 is simultaneously connected to the ground terminal V? I1 f is simultaneously secreted to the power converter of the power converter 3〇0: 3:?. In the present embodiment, the current on the compensating resistor R3 is supplied to the power supply line 2, and the voltage drop across the compensating resistor R3 is in the present embodiment. The second end of the compensating resistor R3 is N2, and D is positive. At the end, the input current 丨丨 of the power converter 3〇〇 is taken, so that [the current on the line 20 | 〇 (the current on the power supply line 2 〇 is proportional to the input and/or the vertical f). The feedback circuit 420 is based on the compensation resistor R3, and the feedback circuit 420 can be used to supply the signal to the Vfb. The feedback circuit 420 can be based on the output voltage of the compensation resistor R3. The potential is used to compensate the line loss of the power supply line 2. When it is quite, please refer to the 4th figure, the feedback circuit 42〇 and the compensation resistor are formed into the second sensing circuit 410. This sensing circuit is in addition to the sensing power conversion crying = ^ round When the potential of the voltage Vo is '5', the power supply line 2 is also sensed to output the feedback signal vft. As shown in the figure, the sensing circuit 41〇2 first 201106598 resistor R1, the second resistor R2 and the compensation resistor R3. These three series are connected into a resistor string. One end of the resistor string is switched to the power supply terminal out of the power output of the power exchange crying 3, and the other end is coupled to the negative terminal VG', and is combined with the load 30. - circuit loop. The load % VG and the ground terminal VG, VG of the power converter 3QQ, can be mutually independent & As shown in Fig. 4, in the present embodiment, the compensating resistor R3 is a converter 300 The input current 丨_丨, the current sensing signal Vcs is i, the Wei resistance R3 cross-voltage and the load current 丨〇 have two ratios . In which their relationship is: VCS = r, xIi ^ r3xlox ^ fsL ⑴ Vi-Vg "...... w?

Where '3 is the resistance value of the compensation resistor R3, v丨 is the power 3J) 0 input voltage ' Vo refers to the output voltage of the power converter 3〇〇, ^;, 疋 曰 power conversion benefits 300 power input Ground voltage, v 30 ground voltage., voltage sensing 彳§ VOS is the second resistor R2 and the compensation resistor R3. Use the voltage divider function of the resistor string; The sense transmission and the load voltage ▽〇, as well as the load current 〇, are generated in a series. The relationship is: Off (Vo'-Vg^) Jl+ll]xV〇sJILY 3χ/οχ V£sfg:) (2) V U-2 person Vi-Vg") (4) where "1, r2 are the resistance values of the first resistor ri and the second resistor R2, respectively. According to the foregoing equations (1) and (2), the adaptive sensing circuit 41 can increase the potential of the feedback Vfb according to the voltage across the compensation resistor R3 (i.e., the current sensing signal vcs). ~ p The foregoing equations (1) and (2) are cases where the power converter 300 performs a buck conversion. From equation (2), it can be found that the sensible signal ν〇§ 疋 load VVo' and the 贞 load current 丨Q function, the current sense 黯 vcs is also a function of boost (boost) conversion, buck-boost ( The buck_b〇〇s conversion is still valid in October. Therefore, the concept of the present invention can also be applied to other types of power conversion, such as boost conversion, buck-boost conversion, etc. 201106598 300 The compensation resistor R3 allows the power converter to actually increase V1 (V1= (R1/R2) *n*R3) to compensate for the parasitic voltage of the line 20 〇 23 〇 R voltage V 〇 , , ,, if full compensation is required Power supply ^W, the resistance value of the slave compensation resistor R3 is: Electric soil 20 (conference). The resistance value of the compensation resistor R3 and the resistance value 2*Rw of the power supply line 20 have a preset proportional relationship. In the present embodiment, the first end 1 of the compensation resistor R3 is input to the diode 豸D. In the present embodiment, the first end 1 of the compensation resistor R3 is input to the diode 豸D. The second end N2 is coupled to the capacitor c power to the fH3QG wheel (four) rogue Q. The collapse power is shown in the figure 'in this embodiment, the compensation R3 draws the output current $ of $3QQ. At this time, the load current of the compensating resistor R3 across the platen has a ratio of -1. The relationship is: VCS = r3 X 1〇...( 3) where '3 is the resistance value of the compensation resistor R3. The voltage divider function of the v〇sm string λ can make the voltage sensing signal system. The load current b produces a certain scaling ratio X-VOS + x / 〇)......(3) (F〇'-Fg') = il + il where two 1'r2 are the resistance values of the first resistor R1 and the second resistor R2, respectively. According to the above equation (1) (2), the adaptive sensing circuit 410 can increase the potential of the feedback signal Vfb according to the voltage across the compensation resistor R3 (ie, the current sensing signal vcs). The setting of the compensation resistor R3 can be used to convert the power. 3〇〇 output厣

Vo increases V2 (V2 = (R1/R2) *|〇*R3)' to compensate for the voltage Vo' actually supplied to the carrier 30. Therefore, if you need to completely compensate the parasitic resistance 2*Rw of the power supply line 2〇, you can set the resistance value of the compensation resistor R3 to be: R3=2*( R2/R1 )*Rw. The resistance value of the compensation resistor R3 is proportional to the resistance value 2*rw of the power supply line 2〇 and has a box ratio. - dome 201106598 is used for power supply; = first terminal N2 connected to power supply line 20 and control test 54 = 3 is the output of the converter 300 / power = 丨 ° also connected to GND to draw power Power supply to the market ί 20^=:^=, the ground _ terminal GND and the power supply grounding G = system s 54 〇 grounding R3 disk for Thunder pn + coins. The ratio of the resistance value of the ratio 1 of the compensation resistor of the present embodiment has the same flow as that of the embodiment of Fig. 5, the method - the preferred embodiment - the power supply line 2 〇, the figure *' is as shown in step si , providing the resistance value 'selected-filled; the resistance is two kilograms' according to the resistance of the electric wire 20 of the power supply line 2〇. Next, the size of (6)==R3 is proportional to the handle connected to the power supply line 20, to sense the line =, the compensation resistor R3 _ kg shows 'compensation resistance R3 is consumed: 'If 1 road 220, 塾High = - feedback electric potential. One of the feedback signals Vfb generated by the circuit 2 is connected by changing the compensation current _0 or the input current 丨丨, and then the output current of the power converter 300. In the case of step-by-step, if the power supply that compensates for the 2Q line loss is grounded by the ground θ, the resistor R3 is coupled to the power converter 3 to output the current ΐ rib side pants turn the brain to the brain-power supply wheel eight = two Input current |j. (1) For detecting the power converter 300, as shown in Fig. 2, the conventional method of compensating for the supply of the slinger 20 έ 〇々 丄 丄 至少 至少 至少 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线 导线Moreover, as the power supply distance increases, the 201106598 increases in synchronization and the cost of the wire 22 increases. In contrast, the power supply control circuit 2 (f) of the first invention is only required to be used. 2. The line loss of the power supply line 20 is compensated. In addition, the compensation power = electric power can be replenished (four), the curry is connected to the remote end of the above-mentioned 'preferred implementation of the invention _, this limits the scope of implementation of the present invention, that is, According to this: = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The figure is a circuit diagram of a typical step-down power converter (BuckC〇nverteh=f^2_-code_power turn-over_).: The power control circuit. The third figure shows the power line line loss compensation function. A schematic diagram of a preferred embodiment. The fourth and fourth embodiments of the present invention have a power supply line ΪΓΠ 料 料 姆 姆 姆 ^ ^ ^ = = = = = = = ========================================================= Method - Flow of the Preferred Embodiment [Description of Main Components] Buck Power Converter 1 〇 Power Supply Line 20 Load 30 10 201106598 Input Voltage Vi Output Voltage Vo Feedback Circuit 12 Controller 14 Feedback Signal Vfb Parasitic Resistance of Power Supply Line Rw load voltage Vo' wire 22 power converter 1 〇〇 power control circuit 200 feedback Controller 220 compensation resistor R3 240

Feedback control terminal FB

Ground terminal GND The first end of the compensation resistor N1 The second end of the compensation resistor N2

Power converter power supply output power supply OUT OUT first resistor R1 second resistor R2 buck power converter 300

Switch Q

Inductance L

Capacitor C

Diode D sensing circuit 410 feedback circuit 420, 520 controller 440, 540 power converter power input ground terminal VG"

Grounding terminal of power converter power output VG 201106598 Grounding end of load VG' Input current of power converter 丨i Output current of power converter 丨0

12

Claims (1)

201106598 VII, the scope of application for patents: 1 · A power control converter with power line compensation function, the power converter - power 'applies to the load' the power control circuit includes: return ship Ξ tree, fine work - the voltage is generated to generate a voltage m according to the feedback signal to adjust the output power of the power converter - a compensation resistor, the compensation resistor and the resistance value of the resistance circuit - wherein one of the compensation resistors The two ends are coupled to the power supply line. Nowadays, as in the circuit-system-dividing circuit of the patent application scope item, the voltage-dividing circuit I is in the right side of the circuit, and the power supply terminal of the power supply is turned off, and the power input is grounded. The disk should be replaced by Leiyang Electric ^ lightly connected to the power conversion source feedback signal. The μ-resistance, and the output terminal are used to output the f. Please request the power control circuit of the third item of the patent scope, and the second-end system of the second-end system is followed by the grounding terminal. 〃" 二ίΓί!, the power control circuit of the fifth item, which causes the compensation electric system to reduce the ground end of the Wei-type of the discriminator, one of the output currents of the work converter "〃 201106598 flows through The compensation electric sister 7_, as claimed in claim 5, is coupled to the power supply circuit of the power converter, wherein one input current of the compensation current flows through the compensation resistor. The grounding end, the power converter 8_ is connected to the lightning supply line, the "", the industrial circuit, as in the fifth aspect of the patent application scope, wherein the controller 9_ is as claimed in claim 6 Thunder, and litigation & + grounding system secret surface compensation resistor _ power supply line 'this power supply On the loop 11: If you apply for the power control circuit of the general item, the circuit detects the output current of the power converter. Eight° shell 12_If the patent scope is applied, the circuit of the item _ the power converter - input current. The method of compensating the power line loss of the power supply line includes: providing a power supply line far away, and a power converter is powered by the power supply line to a known load; according to the resistance value of the power supply line, Selecting a compensation resistor; coupling the compensation resistor to the power supply line; and coupling the compensation resistor to a feedback circuit of the power converter to assert a feedback signal generated by the feedback circuit A 14 "uiJ〇6598 14 where, an input power L. The test of the power converter - the current 1S. The method of compensating the power supply line loss, the grounding of the power supply and the source output, the method of detecting the line loss of the 14th item of the compensation power supply line, the grounding of one of the power input lines Among them, to detect 15