CN202872705U - Double-damping double-mixing connection non-vibration brake frequency conversion apparatus - Google Patents
Double-damping double-mixing connection non-vibration brake frequency conversion apparatus Download PDFInfo
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- CN202872705U CN202872705U CN 201220432364 CN201220432364U CN202872705U CN 202872705 U CN202872705 U CN 202872705U CN 201220432364 CN201220432364 CN 201220432364 CN 201220432364 U CN201220432364 U CN 201220432364U CN 202872705 U CN202872705 U CN 202872705U
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- damping unit
- damping
- resistance
- antihunt
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Abstract
The utility model discloses a double-damping double-mixing connection non-vibration brake frequency conversion apparatus, comprising a frequency converter, wherein the frequency converter comprises a master control circuit; two damping circuits and two electromagnetic valves. Three output terminals of every damping circuit are connected with one electromagnetic valve in series and then are correspondingly connected with three output terminals of an inversion circuit. A control input terminal of the electromagnetic valve is connected with a damping control-signal output terminal of the master control circuit. Every damping circuit comprises three resistors and three capacitors. One resistor and one capacitor are connected in parallel to form a damping unit. Three damping units of one damping circuit are star connection and three damping units of the other damping circuit are triangle connection. By utilizing resistors and capacitors in the damping circuits to consume output terminal energy of the inversion circuit, namely, load terminal energy, purposes of non-vibration, non-noise, non-overvoltage, non-overcurrent and non-temperature rise brake are achieved. The non-vibration brake frequency conversion apparatus is an upgrade product of a stepless speed-regulation frequency converter.
Description
Technical field
The utility model relates to a kind of converter plant, relates in particular to a kind ofly to connect without shaking the brake variable-frequency device two mixing of the improved pair of damping on traditional frequency conversion device basis.
Background technology
Frequency converter has widely purposes at industrial control field, tandem type high voltage converter particularly, especially industrial to heavy-duty motor control, the visual plant of speed governing, frequency converter and motor have formed frequency conversion speed-adjusting system.
The application scenario of many transducer drive motor all needs to have braking function, i.e. quick shutdown and the fast ability of reduction of speed.This wherein also comprises the quick shutdown application scenario of blower fan, pump class.A lot of steel mills are in order to enhance productivity, and the stopping power of frequency converter has been proposed very high requirement.Work period such as steel mill refining one heat steel is 35 minutes, each work period, all require frequency conversion speed-adjusting system, and at 4-l0 dragging motor within second, if frequency converter does not have stopping power, need at least 6 minutes time just can finish reduction of speed.Possess the occasion of frequent braking function for this needs, use the frequency converter without the fast braking ability obviously can affect production efficiency.
At present industrial applications widely accepted braking method have:
1, increase brake unit at the transducer power unit dc bus: this method can make shorten down time, depends on the size of brake unit the fastest attainable down time.But for the tandem type high voltage converter, power cell quantity is many, and each unit increases a brake unit, and not only cost increases greatly, and control is very complicated.
2, DC injection braking: this kind method to input direct-current on the motor stator, in motor, can not increase the cost of frequency converter, but brake torque and dynamic characteristics is all bad with energy consumption by software, and the rotating speed of motor in the reduction of speed process also is difficult to estimate.If DC injection braking needs very high brake torque, then require frequency converter that very strong conveyance capacity is arranged, otherwise cause easily the frequency converter overcurrent tripping.
3, harmonic braking: this method increases harmonic current by software, consumes energy in rotor and the load by increasing the loss of electric machine.This method can cause that the serious heating of motor and noise increase and the high torque (HT) ripple, and this is disadvantage.
4, large-slip braking: when induction motor during by prime mover driven, because the moment of inertia of load, the speed of rotor is greater than the synchronizing speed of rotation air-gap field, and this moment, motor showed as induction generator, and slippage in this case is negative value.Under specific slippage condition, the parameter of electric machine is certain, has such working point, and it will all be converted into from the mechanical energy that prime mover obtains the heat energy of induction electric machine stator and rotor, not have energy to return power supply.Therefore, this method is very suitable for the brake application of voltage source inverter drive motors.But, just because of energy all consumes at motor internal, so motor can serious heating, cause easily the gravity flow bus overvoltage of transducer power unit and the mouth that trips
In sum, the shortcoming of the braking technology of traditional frequency conversion device is: control is complicated, and motor temperature, noise and serious vibration increase, the easy overvoltage of frequency converter or overcurrent tripping in the braking procedure.
Summary of the invention
The purpose of this utility model just is that providing a kind of in order to address the above problem connects without shaking the brake variable-frequency device improved pair of two mixing of damping on traditional frequency conversion device basis.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The described in the utility model pair of two mixing of damping connect without the brake variable-frequency device that shakes and comprise frequency converter, and described frequency converter comprises power circuit, rectification circuit, inverter circuit, governor circuit, drive circuit, voltage sampling circuit and current sampling circuit; The described pair of two mixing of damping connect without the brake variable-frequency device that shakes and also comprise the first antihunt circuit, the second antihunt circuit, the first electromagnetically operated valve and the second electromagnetically operated valve, the corresponding connection of three outputs with described inverter circuit of connecting behind described the first electromagnetically operated valve of three outputs of described the first antihunt circuit, the corresponding connection of three outputs with described inverter circuit of connecting behind described the second electromagnetically operated valve of three outputs of described the second antihunt circuit, the control input end of described the first electromagnetically operated valve be connected the control input end of the second electromagnetically operated valve and be connected with the damping control signal output of described governor circuit respectively; Described the first antihunt circuit comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity, described the first resistance and described the first Capacitance parallel connection form the first damping unit, described the second resistance and described the second Capacitance parallel connection form the second damping unit, described the 3rd resistance and described the 3rd Capacitance parallel connection form the 3rd damping unit, one end of described the first damping unit, one end of described the second damping unit and an end of described the 3rd damping unit interconnect, the other end of described the first damping unit, the other end of the other end of described the second damping unit and described the 3rd damping unit is respectively three outputs of described the first antihunt circuit, described the second antihunt circuit comprises the 4th resistance, the 5th resistance, the 6th resistance, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, described the 4th resistance and described the 4th Capacitance parallel connection form the 4th damping unit, described the 5th resistance and described the 5th Capacitance parallel connection form the 5th damping unit, described the 6th resistance and described the 6th Capacitance parallel connection form the 6th damping unit, described the 4th damping unit, described the 5th damping unit be connected the 6th damping unit successively head and the tail connect, between described the 4th damping unit and described the 5th damping unit, between described the 5th damping unit and described the 6th damping unit, tap after drawing respectively one between described the 4th damping unit and described the 6th damping unit, tap after drawing altogether three, three described rear taps are respectively three outputs of described the second antihunt circuit.
When needs are braked, governor circuit is to two electromagnetically operated valves or one of them electromagnetically operated valve output drive signal, solenoid closure, connect three outputs of two antihunt circuits or one of them antihunt circuit and three outputs of inverter circuit, the resistance of antihunt circuit and electric capacity drop into the load-side of inverter circuit, depletion load end energy makes the load end motor realize fast braking.
The beneficial effects of the utility model are:
It is the purpose that energy consumption of load end reaches braking to the output of inverter circuit that the utility model utilizes resistance in the antihunt circuit and electric capacity, friction in the braking procedure, noiselessness, without overvoltage, without overcurrent, without temperature rise, and by the automatic control that the governor circuit realization is braked, be the upgrading products of traditional stepless time adjustment frequency converter; By two antihunt circuits and two electromagnetically operated valves are set, can realize the Selective Control to retro-speed, realize more accurately braking control.
Description of drawings
Fig. 1 is the two electrical block diagrams that connect without the brake variable-frequency device that shakes that mix of described in the utility model pair of damping;
Fig. 2 is the structural representation of the first antihunt circuit described in the utility model;
Fig. 3 is the structural representation of the second antihunt circuit described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Such as Fig. 1, Fig. 2 and shown in Figure 3, described in the utility model pair of damping mixing Y-connection comprises frequency converter without the brake variable-frequency device that shakes, described frequency converter comprises power circuit, rectification circuit, inverter circuit, governor circuit, drive circuit, voltage sampling circuit and current sampling circuit, the input of rectification circuit connects three live wire R of three phase mains, S, T, the output of rectification circuit is connected with the input of inverter circuit, the three-phase power input end U of the three-phase output end of inverter circuit and load motor M, V, W connects, voltage sampling circuit and current sampling circuit are sampled to the electric current of the voltage of the input of inverter circuit and output respectively and are transferred to governor circuit, governor circuit is controlled inverter circuit by drive circuit, the input of power circuit connects wherein two live wires in the three phase mains, and the output of power circuit is connected with the power input of governor circuit; Described pair of damping mixing Y-connection also comprises the first antihunt circuit, the second antihunt circuit, the first electromagnetically operated valve and the second electromagnetically operated valve without the brake variable-frequency device that shakes, three output terminals A, B, C of the first antihunt circuit corresponding connection of three outputs with inverter circuit of connecting behind the first electromagnetically operated valve, three output D, E, F of the second antihunt circuit corresponding connection of three outputs with inverter circuit of connecting behind the second electromagnetically operated valve, the control input end of the first electromagnetically operated valve be connected the control input end of electromagnetically operated valve and be connected with the damping control signal output of governor circuit respectively; Described the first antihunt circuit comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3, the first resistance R 1 and the first capacitor C 1 formation the first damping unit in parallel, the second resistance R 2 and the second capacitor C 2 formation the second damping units in parallel, the 3rd resistance R 3 and the 3rd capacitor C 3 formation the 3rd damping units in parallel, one end of the first damping unit, one end of the second damping unit and an end of the 3rd damping unit interconnect the other end of the first damping unit, the other end of the other end of the second damping unit and the 3rd damping unit is respectively three output terminals A of the first antihunt circuit, B, C; The second antihunt circuit comprises the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 4th capacitor C 4, the 5th capacitor C 5 and the 6th capacitor C 6, the 4th resistance R 4 and the 4th capacitor C 4 formation the 4th damping units in parallel, the 5th resistance R 5 and the 5th capacitor C 5 formation the 5th damping units in parallel, the 6th resistance R 6 and the 6th capacitor C 6 formation the 6th damping units in parallel, the 4th damping unit, the 5th damping unit connects with the 6th damping unit successively head and the tail, between the 4th damping unit and the 5th damping unit, between the 5th damping unit and the 6th damping unit, tap after drawing respectively one between the 4th damping unit and the 6th damping unit, tap after drawing altogether three, tap is respectively three output D of the second antihunt circuit after three, E, F.
Such as Fig. 1, Fig. 2 and shown in Figure 3, when needs are braked, governor circuit is to two or an electromagnetically operated valve output drive signal, solenoid closure, three-phase power input end U, V, W that three outputs connecting three outputs of two or one antihunt circuits and inverter circuit are load motor M, the resistance of antihunt circuit and electric capacity drop into the load-side of inverter circuit, and depletion load end motor M energy makes load end motor M realize fast braking.
Claims (1)
1. two a mixing of two dampings connects without shaking the brake variable-frequency device, comprises frequency converter, and described frequency converter comprises power circuit, rectification circuit, inverter circuit, governor circuit, drive circuit, voltage sampling circuit and current sampling circuit; It is characterized in that: the described pair of two mixing of damping connect without the brake variable-frequency device that shakes and also comprise the first antihunt circuit, the second antihunt circuit, the first electromagnetically operated valve and the second electromagnetically operated valve, the corresponding connection of three outputs with described inverter circuit of connecting behind described the first electromagnetically operated valve of three outputs of described the first antihunt circuit, the corresponding connection of three outputs with described inverter circuit of connecting behind described the second electromagnetically operated valve of three outputs of described the second antihunt circuit, the control input end of described the first electromagnetically operated valve be connected the control input end of the second electromagnetically operated valve and be connected with the damping control signal output of described governor circuit respectively; Described the first antihunt circuit comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity, described the first resistance and described the first Capacitance parallel connection form the first damping unit, described the second resistance and described the second Capacitance parallel connection form the second damping unit, described the 3rd resistance and described the 3rd Capacitance parallel connection form the 3rd damping unit, one end of described the first damping unit, one end of described the second damping unit and an end of described the 3rd damping unit interconnect, the other end of described the first damping unit, the other end of the other end of described the second damping unit and described the 3rd damping unit is respectively three outputs of described the first antihunt circuit, described the second antihunt circuit comprises the 4th resistance, the 5th resistance, the 6th resistance, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, described the 4th resistance and described the 4th Capacitance parallel connection form the 4th damping unit, described the 5th resistance and described the 5th Capacitance parallel connection form the 5th damping unit, described the 6th resistance and described the 6th Capacitance parallel connection form the 6th damping unit, described the 4th damping unit, described the 5th damping unit be connected the 6th damping unit successively head and the tail connect, between described the 4th damping unit and described the 5th damping unit, between described the 5th damping unit and described the 6th damping unit, tap after drawing respectively one between described the 4th damping unit and described the 6th damping unit, tap after drawing altogether three, three described rear taps are respectively three outputs of described the second antihunt circuit.
2.?
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432364 CN202872705U (en) | 2012-08-29 | 2012-08-29 | Double-damping double-mixing connection non-vibration brake frequency conversion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432364 CN202872705U (en) | 2012-08-29 | 2012-08-29 | Double-damping double-mixing connection non-vibration brake frequency conversion apparatus |
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| Publication Number | Publication Date |
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| CN202872705U true CN202872705U (en) | 2013-04-10 |
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| CN 201220432364 Expired - Fee Related CN202872705U (en) | 2012-08-29 | 2012-08-29 | Double-damping double-mixing connection non-vibration brake frequency conversion apparatus |
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| CN (1) | CN202872705U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633856A (en) * | 2012-08-29 | 2014-03-12 | 成都酷玩网络科技有限公司 | Double-damping double-mixed connection vibration-free brake frequency conversion device |
-
2012
- 2012-08-29 CN CN 201220432364 patent/CN202872705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633856A (en) * | 2012-08-29 | 2014-03-12 | 成都酷玩网络科技有限公司 | Double-damping double-mixed connection vibration-free brake frequency conversion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20130829 |