CN102223081A - Method for charging high-capacity voltage type frequency converter - Google Patents
Method for charging high-capacity voltage type frequency converter Download PDFInfo
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- CN102223081A CN102223081A CN2011101594959A CN201110159495A CN102223081A CN 102223081 A CN102223081 A CN 102223081A CN 2011101594959 A CN2011101594959 A CN 2011101594959A CN 201110159495 A CN201110159495 A CN 201110159495A CN 102223081 A CN102223081 A CN 102223081A
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Abstract
The invention relates to a method for charging a high-capacity voltage type frequency converter, which is characterized by charging the frequency converter through two stages of current-limiting circuits (4), which mainly comprises three sets of series resistors. The charging method comprises the following steps: firstly, the output ends of the current-limiting circuits (4) are connected with the input end of the voltage type frequency converter through two-stage current-limiting charging; the input ends of the current-limiting circuits (4) are connected with three-phase alternating current 380V; each phase of 380V is used for charging three input ends of the voltage type frequency converter through two series resistors; a rectification circuit is used for pre-charging an electrolytic capacitor (C1) through a pre-charged resistor (R1); and secondarily, a main contact of a first-stage current-limiting charging contactor (KM3) is used for connecting the other end of the resistor connected with a main contact of a contactor (KM3) to the three input ends of the frequency converter; each phase of 380V is used for charging the three input ends of the voltage type frequency converter through a resistor; and a rectification part (1) of the frequency converter is used for outputting positive voltage and directly pre-charging the electrolytic capacitor (C1). When the high-capacity voltage type frequency converter is charged by using the method, electronic elements can be prevented from being damaged.
Description
Technical field
The present invention relates to a kind of charging method of big capacity voltage frequency converter, specifically is to be that the voltage frequency converter of 45KW-250KW was deposited more than 1 year at capacity, gives the charging method of big capacity voltage frequency converter.
Background technology
Along with the large-scale application of voltage frequency converter in factory, the replacing after voltage frequency converter damages and the task of maintenance roll up, because the spare part of voltage frequency converter has generally all been deposited more than at least one year at storehouse, must charge to voltage frequency converter, existing charging modes is direct charging, the possibility that causes the intermediate circuit electrolytic capacitor to damage even may blast easily seriously influences ordinary production.
Summary of the invention
In order to overcome the directly above-mentioned deficiency of charging of existing big capacity voltage frequency converter, avoid the charging method of the big capacity voltage frequency converter of electronic component damage when the invention provides a kind of the charging.
The charging method of this big capacity voltage frequency converter is to be that the two-stage choked flow circuit of main formation charges with three groups of resistors in seriess.The choked flow circuit is by six resistors, contactor KM3, contactor KM2, air switch Q2, start button S1, stop button S2, start button S3, stop button S4 and connecting line are formed, the main contact of contactor KM2 has three to be used for the binding post that connects with external 380V power supply, first terminals of other three binding posts are connecting resistor R 2, second binding post connecting resistor R 3, the 3rd binding post connecting resistor R 4, the other end of resistor R 2 is connecting resistor R 5, the other end of resistor R 5 is connected with first output of choked flow circuit, the other end of resistor R 3 is connecting resistor R 6, the other end of resistor R 6 is connected with second output of choked flow circuit, the other end of resistor R 4 is connecting resistor R 7, and the other end of resistor R 7 is connected with the 3rd output of choked flow circuit.Two binding posts of first phase of the main contact of relay K M3 are connected in parallel on the two ends of resistor R 5, two binding posts of second phase of the main contact of relay K 3 are connected in parallel on the two ends of resistor R 6, and two binding posts of the third phase of the main contact of relay K 3 are connected in parallel on the two ends of resistor R 7.
There are two binding posts to be connected with two input wires terminals of air switch Q2 respectively in the main contact of contactor KM2 and three binding posts that external 380V power supply connects.Start button S1 and two output wiring terminals that are connected air switch Q2 after the pull-in winding three of stop button S2 and contactor KM2 connects successively, the auxiliary contact of contactor KM2 is connected in parallel on the two ends of start button S1, constitutes the control loop of contactor KM2.Start button S3 and two output wiring terminals that are connected air switch Q2 after the pull-in winding three of stop button S4 and contactor KM3 connects successively, the auxiliary contact of contactor K3 is connected in parallel on the two ends of start button S3, constitutes the control loop of contactor KM3.
Wherein R2, R3 equate with the resistance value of R4, and R5, R6 equate that with the resistance value of R7 the resistance value of R5 is 10 times of R2.
R2, R3 in the above-mentioned choked flow circuit and the resistance value of R4 all are set to 1 ohm, and the resistance value of R5, R6 and R7 all is arranged to 10 ohm of the bests.
The charging method of this big capacity (capacity is 45KW--250KW's) voltage frequency converter comprises following sequential steps:
One, charges through two level current limiting
Three inputs such as R with the three-phase bridge rectifier circuit of the rectifying part of three outputs of choked flow circuit and voltage frequency converter, S is connected with T, the binding post of three inputs of conduct of choked flow circuit is connected with three-phase alternating current 380V power supply, two-phase 380V is connected logical with two control loops of contactor KM2 and contactor KM3 by air switch Q2, press start button S1, resistor R 2 and R5 that the main contact of the pull-in winding energising contactor KM2 of contactor KM2 is in series three-phase alternating current 380V power supply and three, R3 is connected logical with R6 and R4 with R7, simultaneously, the auxiliary contact of contactor KM2 connects the two ends of start button S1 logical, contactor KM3 is in off-state, each is defeated by three inputs such as the R of the rectifying part of voltage frequency converter three-phase alternating current 380V power supply after resistance (as R2 and R5) the current limliting step-down of two series connection, S and T charge, at this moment carry out precharge as the three-phase bridge rectifier circuit of the rectifying part electrolysis electrolytic capacitor C1 by DC link in the middle of 1 pair of the precharge resistor R, the contactor KM1 in parallel with precharge resistor R 1 can not adhesive, be off-state, precharge resistor R 1 has continued metering function, 1 couple of electrolytic capacitor C1 carries out precharge by precharge resistance R, and the charging interval is not less than 4 hours.
Two, through the one-level current-limiting charge
Press start button S3, the pull-in winding energising of contactor KM3, the electricity group device R2 that the main contact of contactor KM3 will be connected with the main contact of contactor KM2, three inputs of the three-phase bridge rectifier circuit of the other end of R3 and R4 and the rectifying part of voltage frequency converter such as R, S is connected logical with T, simultaneously, the auxiliary contact of contactor KM3 connects the two ends of start button S3 logical, each is defeated by three inputs such as the R of the rectifying part of voltage frequency converter three-phase alternating current 380V power supply through a resistor such as resistor R 2, S and T charge, because input voltage is higher, charging current is big, when charging voltage reaches 500V ± 25V, contactor KM1 adhesive, the three-phase bridge rectifier circuit output positive voltage of the rectifying part of voltage frequency converter directly carries out precharge to electrolytic capacitor C1, and the charging interval is not less than 4 hours.
Press stop button S2 and S4, the main contact of contactor KM2 and KM3 disconnects, and cuts off three-phase alternating current 380V power supply, takes three inputs such as R, the S of the output of choked flow circuit and voltage frequency converter apart the end of charging with T.
The charging method of this big capacity voltage frequency converter is charged to voltage frequency converter with two kinds of different voltages from low to high, avoids excessive because of charging current, causes electric capacity charging instantaneous short circuit to cause explosion, the damage that voltage frequency converter is caused.
Description of drawings
Fig. 1 is the circuit diagram of this charging method choked flow circuit.
Fig. 2 is charge step one schematic diagram of the main circuit diagram of the big capacity voltage frequency converter of Siemens.
Fig. 3 is charge step two schematic diagrames of the main circuit diagram of the big capacity voltage frequency converter of Siemens.
Fig. 4 is charge step one schematic diagram of the main circuit diagram of the big capacity voltage frequency converter of Japan.
Fig. 5 is charge step two schematic diagrames of the main circuit diagram of the big capacity voltage frequency converter of Japan.Among above-mentioned Fig. 1-Fig. 3:
1-rectifying part 2-intermediate dc link 3-inversion part 4-choked flow circuit
C1 electrolytic capacitor R1 resistor R 2 resistor R 3 resistors
R2, R3 equate that with the resistance value of R4 R5, R6 equate with the resistance value of R7, equal 10R2
Q2 air switch S1 start button S2 stop button S3 start button
S4 stop button KM1 contactor KM2 contactor KM3 contactor
VD1---VD6 thyristor IGBT1---IGBT6 constitutes 6 IGBT modules of inversion part
Among above-mentioned Fig. 4 and Fig. 5:
5-rectifying part 6-intermediate dc link 7-inversion portion C 2 electrolytic capacitors
R8 resistor KM4 contactor
VD7---VD12 thyristor IGBT7---IGBT12 constitutes 6 IGBT modules of inversion part
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with enforcement and accompanying drawing thereof, but the specific embodiment of the present invention is not limited to following embodiment.
The used choked flow circuit 4 of present embodiment is described earlier.The choked flow circuit 4 that Fig. 1 describes is by six resistors, contactor KM3, contactor KM2, air switch Q2, start button S1, stop button S2, start button S3, stop button S4 and connecting line are formed, the main contact of contactor KM2 has three to be used for the binding post that connects with external 380V power supply, first terminals of other three binding posts are connecting resistor R 2, second binding post connecting resistor R 3, the 3rd binding post connecting resistor R 4, the other end of resistor R 2 is connecting resistor R 5, the other end of resistor R 5 is connected with first output of choked flow circuit, the other end of resistor R 3 is connecting resistor R 6, the other end of resistor R 6 is connected with second output of choked flow circuit, the other end of resistor R 4 is connecting resistor R 7, and the other end of resistor R 7 is connected with the 3rd output of choked flow circuit.Two binding posts of first phase of the main contact of relay K M3 are connected in parallel on the two ends of resistor R 5, two binding posts of second phase of the main contact of relay K 3 are connected in parallel on the two ends of resistor R 6, and two binding posts of the third phase of the main contact of relay K 3 are connected in parallel on the two ends of resistor R 7.
There are two binding posts to be connected with two input wires terminals of air switch Q2 respectively in the main contact of contactor KM2 and three binding posts that external 380V power supply connects.Start button S1 and two output wiring terminals that are connected air switch Q2 after the pull-in winding three of stop button S2 and contactor KM2 connects successively, the auxiliary contact of contactor KM2 is connected in parallel on the two ends of start button S1, constitutes the control loop of contactor KM2.Start button S3 and two output wiring terminals that are connected air switch Q2 after the pull-in winding three of stop button S4 and contactor KM3 connects successively, the auxiliary contact of contactor K3 is connected in parallel on the two ends of start button S3, constitutes the control loop of contactor KM3.The resistance value of R2, R3 and R4 all is 1 ohm, and the resistance value of R5, R6 and R7 all is 10 ohm.
Embodiment one
Present embodiment is applicable to that capacity is the voltage frequency converter of 45-250KW, and present embodiment is given Siemens's series voltage type frequency converter charging of Siemens 75KW, and model is 6SE7031-5EF60.This voltage frequency converter was placed 2 years at storehouse, and as the voltage frequency converter that Fig. 2 describes, it mainly is made up of rectifying part 1, intermediate dc link 2 and inversion part 3, and relay contact KM1 and resistor R 1 are the precharge loop feature.Three-phase bridge rectifier circuit as rectifying part 1 has six thyristor VD1---VD6, and three input U1/L1, V1/L2 and W1/L3 are arranged.Intermediate dc link 2 mainly is made of electrolytic capacitor C1, and inversion part 3 realizes frequency control by 6 full-control type power IGBT module I GBT1---IGBT6 forms by the PWM pulse-width modulation, and three outputs are U2/T1, V2/T2 and W2/T3.
Present embodiment is a following sequential steps:
One, charges through two level current limiting
Three input U1/L1 with the three-phase bridge rectifier circuit of the rectifying part 1 of three outputs of choked flow circuit 4 shown in Figure 1 and voltage frequency converter, V1/L2 is connected with W1/L3, see Fig. 2, the binding post of three inputs of conduct of choked flow circuit 1 is connected with three-phase alternating current 380V power supply, press air switch Q2, two-phase 380V is connected logical with two control loops of contactor KM2 and contactor KM3, press start button S1, resistor R 2 and R5 that the main contact of the pull-in winding energising contactor KM2 of contactor KM2 is in series three-phase alternating current 380V power supply and three, R3 is connected logical with R6 and R4 with R7, simultaneously, the auxiliary contact of contactor KM2 connects the two ends of start button S1 logical, contactor KM3 is in off-state, each is defeated by three input U1/L1 of the rectifying part 1 of voltage frequency converter totally three-phase alternating current 380V power supply after 11 ohm (as R2 and R5) current limliting step-downs of resistance of two series connection, V1/L2 and W1/L3 charge, at this moment carry out precharge as the three-phase bridge rectifier circuit of the rectifying part 1 electrolytic capacitor C1 by DC link 2 in the middle of 1 pair of the precharge resistor R, the contactor KM1 in parallel with precharge resistor R 1 can not adhesive, be non-attracting state, precharge resistor R 1 has continued metering function, 1 couple of electrolytic capacitor C1 carries out precharge by precharge resistance R, charges 4 hours.
Two, through the one-level current-limiting charge
Press start button S3, the pull-in winding energising of contactor KM3, the electricity group device R2 that the main contact of contactor KM3 will be connected with the main contact of contactor KM2, three input U1/L1 of the three-phase bridge rectifier circuit of the other end of R3 and R4 and the rectifying part of voltage frequency converter 1, V1/L2 is connected logical with W1/L3, see Fig. 3, simultaneously, the auxiliary contact of contactor KM3 connects the two ends of start button S3 logical, three input U1/L1 of each rectifying part 1 of being defeated by voltage frequency converter through one 1 ohm resistor such as resistor R 2 of three-phase alternating current 380V power supply, V1/L2 and W1/L3 charge, because input voltage is higher, charging current is big, when charging voltage reaches 500V ± 25V, contactor KM1 adhesive, the three-phase bridge rectifier circuit output positive voltage of the rectifying part 1 of voltage frequency converter directly carries out precharge to electrolytic capacitor C1, charges 4 hours.
Press stop button S2 and S4, the main contact of contactor KM2 and KM3 disconnects, and cuts off three-phase alternating current 380V power supply, takes output and three inputs of voltage frequency converter of choked flow circuit 4 apart U1/L1, V1/L2 with W1/L3 takes apart, the end of charging.
Embodiment two
Present embodiment is applicable to the voltage frequency converter of capacity for 45-250KW, and present embodiment is given Fuji's series voltage type frequency converter charging of Japanese 90KW, and model is FRN90G11S.This voltage frequency converter was placed 1 year at storehouse, and as the voltage frequency converter that Fig. 4 describes, it mainly is made up of rectifying part 5, intermediate dc link 6 and inversion part 7, and contactor KM4 and resistor R 8 are the precharge loop feature.Three-phase bridge rectifier circuit as rectifying part 5 has six thyristor VD7---VD12, and three input R, S, T are arranged.Intermediate dc link 6 mainly is made of electrolysis electrolytic capacitor C2, and inversion part 7 realizes frequency control by 6 full-control type power IGBT module I GBT7---IGBT12 forms by the PWM pulse-width modulation, and output is U, V and W.
Present embodiment is a following sequential steps:
One, charges through two level current limiting
Three input R with the three-phase bridge rectifier circuit of the rectifying part 1 of three outputs of choked flow circuit 4 shown in Figure 1 and voltage frequency converter, S is connected with T, see Fig. 4, the binding post of three inputs of conduct of choked flow circuit 1 is connected with three-phase alternating current 380V power supply, press air switch Q2, two-phase 380V is connected logical with two control loops of contactor KM2 and contactor KM3, press start button S1, resistor R 2 and R5 that the main contact of the pull-in winding energising contactor KM2 of contactor KM2 is in series three-phase alternating current 380V power supply and three, R3 is connected logical with R6 and R4 with R7, simultaneously, the auxiliary contact of contactor KM2 connects the two ends of start button S1 logical, contactor KM3 is in off-state, each is defeated by three input R of the rectifying part 5 of voltage frequency converter totally three-phase alternating current 380V power supply after 11 ohm (as R2 and R5) current limliting step-downs of resistance of two series connection, S and T charge, at this moment carry out precharge as the three-phase bridge rectifier circuit of the rectifying part 5 electrolysis electrolytic capacitor C2 by DC link 6 in the middle of 8 pairs of the precharge resistor R, the contactor KM4 in parallel with precharge resistor R 8 can not adhesive, be off-state, precharge resistor R 8 has continued metering function, 8 couples of electrolytic capacitor C2 carry out precharge by precharge resistance R, charge 4 hours.
Two, through the one-level current-limiting charge
Press start button S3, the pull-in winding energising of contactor KM3, the electricity group device R2 that the main contact of contactor KM3 will be connected with the main contact of contactor KM2, three input R of the three-phase bridge rectifier circuit of the other end of R3 and R4 and the rectifying part of voltage frequency converter 5, S is connected logical with T, see Fig. 5, simultaneously, the auxiliary contact of contactor KM3 connects the two ends of start button S3 logical, three input R of each rectifying part 5 of being defeated by voltage frequency converter through one 1 ohm resistor such as resistor R 2 of three-phase alternating current 380V power supply, S and T charge, because input voltage is higher, charging current is big, when charging voltage reaches 500V ± 25V, contactor KM4 adhesive, the three-phase bridge rectifier circuit output positive voltage of the rectifying part 5 of voltage frequency converter directly carries out precharge to electrolytic capacitor C2, charges 4 hours.
Press stop button S2 and S4, the main contact of contactor KM2 and KM3 disconnects, and cuts off three-phase alternating current 380V power supply, takes three input R, S of the output of choked flow circuit 4 and voltage frequency converter apart the end of charging with T.
Claims (4)
1. the charging method of a big capacity voltage frequency converter, it is to be the voltage frequency converter charging of 45KW-250KW to capacity with choked flow circuit (4), choked flow circuit (4) is by six resistors, contactor (KM3), contactor (KM2), air switch (Q2), start button (S1), stop button (S2), start button (S3), stop button (S4) and connecting line are formed, the main contact of contactor (KM2) has three to be used for the binding post that connects with external 380V power supply, first terminals of other three binding posts are connecting resistor (R2), second binding post connecting resistor (R3), the 3rd binding post connecting resistor (R4), the other end of resistor (R2) is connecting resistor (R5), the other end of resistor (R5) is connected with first output of choked flow circuit, the other end of resistor (R3) is connecting resistor (R6), the other end of resistor (R6) is connected with second output of choked flow circuit, the other end of resistor (R4) is connecting resistor (R7), and the other end of resistor (R7) is connected with the 3rd output of choked flow circuit; Two binding posts of first phase of the main contact of relay (KM3) are connected in parallel on the two ends of resistor (R5), two binding posts of second phase of the main contact of relay (K3) are connected in parallel on the two ends of resistor (R6), and two binding posts of the third phase of the main contact of relay (K3) are connected in parallel on the two ends of resistor (R7); There are two binding posts to be connected with two input wires terminals of air switch (Q2) respectively in the main contact of contactor (KM2) and three binding posts that external 380V power supply connects; Start button (S1) and two output wiring terminals that are connected air switch (Q2) after the pull-in winding three of stop button (S2) and contactor (KM2) connects successively, the auxiliary contact of contactor (KM2) is connected in parallel on the two ends of start button (S1), constitutes the control loop of contactor (KM2); Start button (S3) and two output wiring terminals that are connected air switch (Q2) after the pull-in winding three of stop button (S4) and contactor (KM3) connects successively, the auxiliary contact of contactor (K3) is connected in parallel on the two ends of start button (S3), constitutes the control loop of contactor (KM3); Wherein electricity group device (R2), resistor (R3) equate all that with the resistance value of resistor (R4) electricity is organized device (R5), resistor (R6) all equates with the resistance value of resistor (R7), all is 10 times of resistor (R2); Charging method comprises following sequential steps:
One, charges through two level current limiting
Three outputs of choked flow circuit (4) are connected with three inputs of the three-phase bridge rectifier circuit of the rectifying part (1) of voltage frequency converter, the binding post of three inputs of conduct of choked flow circuit (4) is connected with three-phase alternating current 380V power supply, two-phase 380V is connected logical with two control loops of contactor (KM2) and contactor (KM3) by air switch Q2, press start button (S1), the resistor (R2) that the main contact of contactor (KM2) is in series three-phase alternating current 380V power supply and three with (R5), (R3) with (R6) and (R4) be connected and lead to (R7), simultaneously, the auxiliary contact of contactor (KM2) connects the two ends of start button (S1) logical, contactor (KM3) is in off-state, three-phase alternating current 380V power supply respectively is defeated by the rectifying part (1) of voltage frequency converter after the resistance current limliting step-down of two series connection three inputs charge, the contactor (KM1) in parallel with precharge resistor (R1) is off-state, at this moment the three-phase bridge rectifier circuit as rectifying part carries out precharge by precharge resistor (R1) to electrolysis electrolytic capacitor (C1), and the charging interval is not less than 4 hours;
Two, through the one-level current-limiting charge
Press start button (S3), the electricity group device (R2) that the main contact of contactor (KM3) will be connected with contactor (KM2) main contact, resistor (R3) is connected logical with the other end of resistor (R4) with three inputs of the three-phase bridge rectifier circuit of the rectifying part of voltage frequency converter, simultaneously, the auxiliary contact of contactor (KM3) connects the two ends of start button (S3) logical, each three input of being defeated by the rectifying part (1) of voltage frequency converter through a resistor of three-phase alternating current 380V power supply charge, when charging voltage reaches 500V ± 25V, contactor (KM1) adhesive, the three-phase bridge rectifier circuit output positive voltage of the rectifying part of voltage frequency converter directly carries out precharge to electrolytic capacitor (C1), and the charging interval is not less than 4 hours.
2. the charging method of big capacity voltage frequency converter according to claim 1 is characterized in that:
Electricity group device (R2) in the described choked flow circuit (1), resistor (R3) all are 1 ohm with the resistance value of resistor (R4), and electricity group device (R5), resistor (R6) all are 10 ohm with the resistance value of resistor (R7).
3. the charging method of big capacity voltage frequency converter according to claim 1 and 2 is characterized in that: it is the Siemens's series voltage type frequency converter charging to Siemens 75KW.
4. the charging method of big capacity voltage frequency converter according to claim 1 and 2 is characterized in that: it is the Fuji's series voltage type frequency converter charging to Japanese 90KW.
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| CN104767395A (en) * | 2015-04-30 | 2015-07-08 | 山东航宇吉力电子有限公司 | Three-phase and single-phase output circuit of variable-frequency power source |
| CN105978358A (en) * | 2012-03-28 | 2016-09-28 | Mks仪器股份有限公司 | Compact, configurable power supply for energizing ozone-producing cells |
| CN108631418A (en) * | 2018-08-29 | 2018-10-09 | 新誉轨道交通科技有限公司 | Vehicle charger and vehicle charging system |
| CN109842097A (en) * | 2017-11-28 | 2019-06-04 | Keb自动化两合公司 | Electronic protection circuit |
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| CN102223081B (en) | 2013-11-20 |
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