CN116054598A - Energy-storage type variable-frequency transmission device - Google Patents
Energy-storage type variable-frequency transmission device Download PDFInfo
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- CN116054598A CN116054598A CN202111261702.1A CN202111261702A CN116054598A CN 116054598 A CN116054598 A CN 116054598A CN 202111261702 A CN202111261702 A CN 202111261702A CN 116054598 A CN116054598 A CN 116054598A
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- bipolar transistor
- insulated gate
- gate bipolar
- voltage
- energy storage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses an energy storage type variable frequency transmission device which comprises a rectifying/inverting unit, an energy storage capacitor, an inverting unit and a detection control unit. The rectification/inversion unit is used for receiving external three-phase alternating voltage, converting the external three-phase alternating voltage into direct voltage and outputting the direct voltage. The energy storage capacitor is used for receiving the direct current voltage so as to store electric energy and stabilize the direct current voltage. The inversion unit is used for receiving the direct-current voltage, converting the direct-current voltage into three-phase alternating-current voltages with different frequencies and outputting the three-phase alternating-current voltages. The detection control unit is used for acquiring the operation parameters of the rectifying/inverting unit, the energy storage capacitor and the inverting unit, generating pulse width modulation signals based on the operation parameters and realizing dynamic adjustment to the rectifying/inverting unit and the inverting unit, wherein the operation parameters are voltage and current values. The invention reduces a set of rectifying unit, a set of voltage stabilizing capacitor, a set of switch, corresponding control loop, cabinet body and the like, greatly simplifies the system configuration, can realize the functions of energy storage and variable frequency transmission, and can reduce the equipment cost.
Description
Technical Field
The invention belongs to the field of electrical control, and particularly relates to an energy storage type variable-frequency transmission device.
Background
In industrial enterprises, the variable frequency speed regulation technology is widely applied to motor transmission control of fans and water pumps. Referring to fig. 3, a main loop of a standard variable frequency transmission device mainly comprises a rectifying unit, a voltage stabilizing capacitor, an inversion unit, a matched switch and the like which are sequentially connected in series.
The variable frequency transmission rectifying unit adopts a three-phase full-bridge rectifying circuit to convert alternating current voltage into direct current voltage (AC-DC). The voltage stabilizing capacitor plays a role in stabilizing fluctuation of direct current voltage and maintaining the stabilization of the direct current voltage through periodical charge and discharge. The inverter unit converts the direct-current voltage into an alternating-current voltage (DC-AC) of a desired frequency and outputs the same to the motor.
In order to fully utilize clean energy generated by the photovoltaic power generation device and adapt to a time-of-use electricity price mechanism, the capacitive energy storage device is widely and widely applied, and referring to fig. 4, a main loop of the capacitive energy storage device consists of a rectification/inversion integrated unit, an energy storage capacitor, a matched switch and the like.
The rectification/inversion integrated unit of the capacitor energy storage device adopts a three-phase full-bridge bidirectional rectification/inversion circuit; operating in a rectified state (AC-DC) while storing energy to charge the energy storage capacitor; during discharging, the battery is operated in an inversion state (DC-AC) to convert the direct current voltage of the battery into alternating current voltage and output the alternating current voltage.
For energy saving and carbon reduction, green development is realized, and in the water pump motor driving application of a water pump station, referring to fig. 5, the variable frequency transmission device and the capacitor energy storage device can be used in a matched mode in groups, and the same section of electric bus is connected to realize parallel operation. The energy storage device stores electric energy in the electricity price low-valley stage, releases electric energy in the peak period and supplies the electric energy to the variable frequency transmission device, so that the variable frequency transmission device can partially replace the power supply of a power grid and reduce the operation cost. Its advantages are high cost and long recovery period.
Disclosure of Invention
The invention aims to provide an energy storage type variable frequency transmission device so as to solve the technical problems of high cost and complex structure.
In order to solve the problems, the technical scheme of the invention is as follows:
an energy-storage type variable-frequency transmission device comprises a rectifying/inverting unit, an energy storage capacitor, an inverting unit and a detection control unit;
the rectification/inversion unit is used for receiving external three-phase alternating voltage, converting the external three-phase alternating voltage into direct voltage and outputting the direct voltage;
the energy storage capacitor is used for receiving direct-current voltage so as to store electric energy and stabilize the direct-current voltage;
the inversion unit is used for receiving the direct-current voltage, converting the direct-current voltage into three-phase alternating-current voltages with different frequencies and outputting the three-phase alternating-current voltages;
the detection control unit is used for acquiring the operation parameters of the rectifying/inverting unit, the energy storage capacitor and the inverting unit, generating pulse width modulation signals based on the operation parameters and realizing dynamic adjustment to the rectifying/inverting unit and the inverting unit, wherein the operation parameters are voltage and current values.
Further preferably, the detection control unit is further configured to determine whether an abnormal state exists based on the operation parameter, and if the abnormal state exists, send out an alarm signal, and disconnect the circuit connection of the rectification/inversion unit and the detection control unit.
Specifically, the rectifying/inverting unit is a first insulated gate bipolar transistor group, a second insulated gate bipolar transistor group and a third insulated gate bipolar transistor group which are connected in parallel;
the first insulated gate bipolar transistor group, the second insulated gate bipolar transistor group and the third insulated gate bipolar transistor group are used for respectively receiving alternating voltage of each branch of external three-phase alternating voltage and outputting and converging the alternating voltage at the same time to obtain direct voltage.
The first insulated gate bipolar transistor group comprises a first insulated gate bipolar transistor and a second insulated gate bipolar transistor, and an emitter of the first insulated gate bipolar transistor is electrically connected with a collector of the second insulated gate bipolar transistor and is electrically connected with one path of external three-phase alternating voltage;
the second insulated gate bipolar transistor group comprises a third insulated gate bipolar transistor and a fourth insulated gate bipolar transistor, and the emitter of the third insulated gate bipolar transistor is electrically connected with the collector of the fourth insulated gate bipolar transistor and is electrically connected with one path of external three-phase alternating voltage;
the third insulated gate bipolar transistor group comprises a fifth insulated gate bipolar transistor and a sixth insulated gate bipolar transistor, and an emitter of the fifth insulated gate bipolar transistor is electrically connected with a collector of the sixth insulated gate bipolar transistor and is electrically connected with one path of external three-phase alternating voltage;
the collector of the first insulated gate bipolar transistor, the collector of the third insulated gate bipolar transistor and the collector of the fifth insulated gate bipolar transistor are electrically connected with each other;
the emitter of the second insulated gate bipolar transistor, the emitter of the fourth insulated gate bipolar transistor, and the emitter of the sixth insulated gate bipolar transistor are electrically connected to each other.
Specifically, the inversion unit is a third insulated gate bipolar transistor group, a fourth insulated gate bipolar transistor group and a fifth insulated gate bipolar transistor group which are connected in parallel;
the fourth insulated gate bipolar transistor group, the fifth insulated gate bipolar transistor group and the sixth insulated gate bipolar transistor group are used for respectively receiving direct-current voltages, and the three-phase bridge inverter circuit is formed and divided into three paths to be output to an external three-phase asynchronous motor.
The fourth insulated gate bipolar transistor group comprises a seventh insulated gate bipolar transistor and an eighth insulated gate bipolar transistor, and an emitter of the seventh insulated gate bipolar transistor is electrically connected with a collector of the eighth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor;
the fifth insulated gate bipolar transistor group comprises a ninth insulated gate bipolar transistor and a tenth insulated gate bipolar transistor, and an emitter of the ninth insulated gate bipolar transistor is electrically connected with a collector of the tenth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor;
the sixth insulated gate bipolar transistor group comprises an eleventh insulated gate bipolar transistor and a twelfth insulated gate bipolar transistor, and an emitter of the tenth insulated gate bipolar transistor is electrically connected with a collector of the twelfth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor;
the collector of the seventh insulated gate bipolar transistor, the collector of the ninth insulated gate bipolar transistor and the collector of the eleventh insulated gate bipolar transistor are electrically connected with each other;
the emitter of the eighth insulated gate bipolar transistor, the emitter of the tenth insulated gate bipolar transistor, and the emitter of the twelfth insulated gate bipolar transistor are electrically connected to each other.
Specifically, the detection control unit comprises a voltage transformer, a current transformer and a signal processor;
the voltage transformer is used for collecting voltage values of the rectifying/inverting unit, the energy storage capacitor and the inverting unit;
the current transformer is used for collecting current values of the rectifying/inverting unit, the energy storage capacitor and the inverting unit;
the signal processor is used for receiving and processing the voltage value and the current value, obtaining a pulse width modulation signal and sending the pulse width modulation signal to the rectifying/inverting unit and the inverting unit to realize dynamic adjustment.
By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art: the invention integrates a rectifying/inverting unit, an energy storage capacitor and an inverting unit, and designs a brand new energy storage type variable frequency transmission device. Compared with the conventional two sets of devices which operate in groups, a set of rectifying units, a set of voltage stabilizing capacitors, a set of switches, corresponding control loops, a cabinet body and the like are reduced, the system configuration is greatly simplified, the energy storage and variable frequency transmission functions can be realized, and the equipment cost can be reduced.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
FIG. 1 is a block diagram of an energy-storing variable frequency drive according to an embodiment of the present invention;
fig. 2 is a circuit configuration diagram of an energy-storing type frequency-converting transmission device according to an embodiment of the present invention;
FIG. 3 is a block diagram of a variable frequency drive in contrast to the present invention;
FIG. 4 is a block diagram of a comparative structure of a capacitive energy storage device in accordance with the present invention;
fig. 5 is a block diagram of a variable frequency drive in combination with a capacitive energy storage device in contrast to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
The energy-storage type variable frequency transmission device provided by the invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims.
Examples
Referring to fig. 1, the present embodiment provides an energy-storage type variable frequency transmission device, which includes a rectifying/inverting unit, an energy-storage capacitor, an inverting unit, and a detection control unit, wherein the rectifying/inverting unit, the energy-storage capacitor, and the inverting unit are sequentially connected in parallel. The rectification/inversion unit uses an Insulated Gate Bipolar Transistor (IGBT) capable of being turned off to form a three-phase bridge rectification/inversion integrated circuit, and the three-phase bridge rectification/inversion integrated circuit is used for respectively receiving external three-phase alternating voltage and converting the external three-phase alternating voltage into direct voltage to be output, and can operate three states of uncontrolled rectification, controllable rectification and inversion according to the requirement. The energy storage capacitor receives the direct current voltage, so as to store electric energy and stabilize the direct current voltage. The inverter unit also adopts an insulated gate bipolar transistor capable of being turned off to form a three-phase bridge inverter circuit, and is matched with an RC filter circuit for receiving direct-current voltage, converting the direct-current voltage into three-phase alternating-current voltages with different frequencies according to the requirement and outputting the three-phase alternating-current voltages to an external motor, so that driving is realized.
Referring to fig. 2, specifically, the rectifying/inverting unit is a first insulated gate bipolar transistor group, a second insulated gate bipolar transistor group and a third insulated gate bipolar transistor group which are connected in parallel from left to right, respectively receives ac voltages of each branch of the external three-phase ac voltage, and simultaneously outputs and converges to obtain a dc voltage.
The first insulated gate bipolar transistor group comprises a first insulated gate bipolar transistor and a second insulated gate bipolar transistor, and electric signals in one path of alternating voltage respectively enter an emitter of the first insulated gate bipolar transistor and a collector of the second insulated gate bipolar transistor.
The second insulated gate bipolar transistor group comprises a third insulated gate bipolar transistor and a fourth insulated gate bipolar transistor, and electric signals in the alternating voltage of the other path enter an emitter of the third insulated gate bipolar transistor and a collector of the fourth insulated gate bipolar transistor respectively.
The third insulated gate bipolar transistor group comprises a fifth insulated gate bipolar transistor and a sixth insulated gate bipolar transistor, and the electric signal of the last alternating voltage respectively enters the emitter of the fifth insulated gate bipolar transistor and the collector of the sixth insulated gate bipolar transistor.
The collector of the first insulated gate bipolar transistor and the collector of the third insulated gate bipolar transistor are electrically connected with the collector of the fifth insulated gate bipolar transistor, and are electrically connected with one end of the energy storage capacitor and one end of the inversion unit. The emitter of the second insulated gate bipolar transistor, the emitter of the fourth insulated gate bipolar transistor and the emitter of the sixth insulated gate bipolar transistor are electrically connected with each other and the other ends of the energy storage capacitor and the inversion unit. Thereby delivering the dc voltage to the storage capacitor and the inverter unit.
Referring to fig. 2, specifically, the inverter unit is a third insulated gate bipolar transistor group, a fourth insulated gate bipolar transistor group and a fifth insulated gate bipolar transistor group, which are connected in parallel from left to right, and are configured to receive dc voltages respectively, form a three-phase bridge inverter circuit, and output to an external three-phase asynchronous motor through three paths.
The fourth insulated gate bipolar transistor group comprises a seventh insulated gate bipolar transistor and an eighth insulated gate bipolar transistor. The emitter of the seventh insulated gate bipolar transistor is electrically connected with the collector of the eighth insulated gate bipolar transistor and is electrically connected with one path of the external three-phase asynchronous motor. One path of direct current voltage enters from the collector of the seventh insulated gate bipolar transistor and is output from the emitter, the other path of direct current voltage enters from the emitter of the eighth insulated gate bipolar transistor and is output from the collector, and the last two paths of direct current voltage are converged into one path of alternating current.
The fifth insulated gate bipolar transistor group comprises a ninth insulated gate bipolar transistor and a tenth insulated gate bipolar transistor, and an emitter of the ninth insulated gate bipolar transistor is electrically connected with a collector of the tenth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor. One path of direct current voltage enters from the collector of the ninth insulated gate bipolar transistor and is output from the emitter, the other path of direct current voltage enters from the emitter of the tenth insulated gate bipolar transistor and is output from the collector, and the last two paths of direct current voltage are converged into another path of alternating current.
The sixth insulated gate bipolar transistor group comprises an eleventh insulated gate bipolar transistor and a twelfth insulated gate bipolar transistor, and an emitter of the tenth insulated gate bipolar transistor is electrically connected with a collector of the twelfth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor. One path of direct current voltage enters from the collector of the eleventh insulated gate bipolar transistor and is output from the emitter, the other path of direct current voltage enters from the emitter of the twelfth insulated gate bipolar transistor and is output from the collector, and the last two paths of direct current voltage are converged into the last path of alternating current.
Referring to fig. 2, the detection control unit is configured to obtain operation parameters such as voltages and current values of the rectifying/inverting unit, the energy storage capacitor, and the inverting unit, and generate pulse width modulation signals (PWM) to the rectifying/inverting unit and the inverting unit based on the operation parameters to implement dynamic adjustment. Specifically, the detection control unit includes a voltage transformer, a current transformer, and a signal processor (DSP). The voltage transformer is used for collecting voltage values of the rectifying/inverting unit, the energy storage capacitor and the inverting unit, the current transformer is used for collecting current values of the rectifying/inverting unit, the energy storage capacitor and the inverting unit, the signal processor is used for receiving and processing the collected voltage values and current values, and accordingly corresponding executing strategies are selected according to requirements, and pulse width modulation signals are sent to the insulated gate bipolar transistors in the rectifying/inverting unit and the inverting unit to realize dynamic adjustment.
The dynamic adjustment is as follows
Executing a frequency transmission mode (namely power grid electricity taking and motor running): the rectifying/inverting unit works in a controllable rectifying state, the energy storage capacitor is fully charged, and the inverting unit inverts and outputs the energy storage capacitor, so that the external motor is driven to operate. The detection control unit is used for detecting the direct-current voltage signal, negative feedback control is adopted, and a control instruction is output to drive the rectifying/inverting unit to maintain the stability of the direct-current voltage.
The energy storage mode is executed (i.e. the grid is charged and discharged, the motor is not running) and only operates as an energy storage device. When energy is stored, the rectifying/inverting unit is in a controllable rectifying state, the energy storage capacitor is fully charged, and the inverting unit is turned off in an inverting way and does not output. The detection control unit is used for detecting the direct-current voltage signal, negative feedback control is adopted, and a control instruction is output to drive the rectifying/inverting unit to maintain the stability of the direct-current voltage. When the electric energy is released, the rectifying/inverting unit works in a controllable inversion state, so that the energy storage capacitor is discharged, and the inverting unit keeps inversion turn-off. The direct-current voltage signal is detected by the detection control unit, when the voltage is low to a set value, the discharging of the energy storage capacitor is finished, the rectifying/inverting unit is turned off, the energy storage and release period is finished, and the next period is waited to start.
And executing an energy storage and variable frequency transmission mode (namely power grid outage and motor operation), switching off the rectifying/inverting unit in the operation process, discharging by the energy storage capacitor, inverting and outputting by the inverting unit, namely directly driving the motor by the energy storage energy, thereby being suitable for security operation of power grid outage and playing a role in reducing cost in peak electricity price time.
Preferably, the detection control unit is further configured to determine whether an abnormal state exists based on the operation parameter, and if the abnormal state exists, send out an alarm signal, and disconnect the circuit connection between the rectifying/inverting unit and the detection control unit.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.
Claims (7)
1. The energy storage type variable frequency transmission device is characterized by comprising a rectifying/inverting unit, an energy storage capacitor, an inverting unit and a detection control unit;
the rectification/inversion unit is used for receiving external three-phase alternating voltage, converting the external three-phase alternating voltage into direct voltage and outputting the direct voltage;
the energy storage capacitor is used for receiving direct-current voltage so as to store electric energy and stabilize the direct-current voltage;
the inversion unit is used for receiving the direct-current voltage, converting the direct-current voltage into three-phase alternating-current voltages with different frequencies and outputting the three-phase alternating-current voltages;
the detection control unit is used for acquiring the operation parameters of the rectifying/inverting unit, the energy storage capacitor and the inverting unit, generating pulse width modulation signals to the rectifying/inverting unit and the inverting unit based on the operation parameters to realize dynamic adjustment, wherein the operation parameters are voltage and current values.
2. The energy storage type variable frequency transmission device according to claim 1, wherein the detection control unit is further configured to determine whether an abnormal state exists based on the operation parameter, and if the abnormal state exists, to issue an alarm signal, and to disconnect the circuit connection of the rectifying/inverting unit and the detection control unit.
3. The energy storage type variable frequency transmission device according to claim 1, wherein the rectifying/inverting unit is a first insulated gate bipolar transistor group, a second insulated gate bipolar transistor group and a third insulated gate bipolar transistor group which are connected in parallel with each other;
the first insulated gate bipolar transistor group, the second insulated gate bipolar transistor group and the third insulated gate bipolar transistor group are used for respectively receiving alternating voltage of each branch of external three-phase alternating voltage and outputting and converging the alternating voltage to obtain direct voltage.
4. The energy-storage type variable frequency transmission device according to claim 3, wherein,
the first insulated gate bipolar transistor group comprises a first insulated gate bipolar transistor and a second insulated gate bipolar transistor, and an emitter of the first insulated gate bipolar transistor is electrically connected with a collector of the second insulated gate bipolar transistor and is electrically connected with one path of external three-phase alternating voltage;
the second insulated gate bipolar transistor group comprises a third insulated gate bipolar transistor and a fourth insulated gate bipolar transistor, and an emitter of the third insulated gate bipolar transistor is electrically connected with a collector of the fourth insulated gate bipolar transistor and is electrically connected with one path of external three-phase alternating voltage;
the third insulated gate bipolar transistor group comprises a fifth insulated gate bipolar transistor and a sixth insulated gate bipolar transistor, and an emitter of the fifth insulated gate bipolar transistor is electrically connected with a collector of the sixth insulated gate bipolar transistor and is electrically connected with one path of external three-phase alternating voltage;
the collector of the first insulated gate bipolar transistor, the collector of the third insulated gate bipolar transistor and the collector of the fifth insulated gate bipolar transistor are electrically connected with each other;
the emitter of the second insulated gate bipolar transistor, the emitter of the fourth insulated gate bipolar transistor, and the emitter of the sixth insulated gate bipolar transistor are electrically connected to each other.
5. The energy storage type variable frequency transmission device according to claim 1, wherein the inversion unit is a third insulated gate bipolar transistor group, a fourth insulated gate bipolar transistor group and a fifth insulated gate bipolar transistor group which are connected in parallel with each other;
the fourth insulated gate bipolar transistor group, the fifth insulated gate bipolar transistor group and the sixth insulated gate bipolar transistor group are used for respectively receiving direct-current voltages, and the three-phase bridge inverter circuit is formed by dividing the three-phase bridge inverter circuit into three paths and outputting the three paths to an external three-phase asynchronous motor.
6. The energy storage type variable frequency transmission device according to claim 5, wherein the fourth insulated gate bipolar transistor group comprises a seventh insulated gate bipolar transistor and an eighth insulated gate bipolar transistor, and an emitter of the seventh insulated gate bipolar transistor is electrically connected with a collector of the eighth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor;
the fifth insulated gate bipolar transistor group comprises a ninth insulated gate bipolar transistor and a tenth insulated gate bipolar transistor, and an emitter of the ninth insulated gate bipolar transistor is electrically connected with a collector of the tenth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor;
the sixth insulated gate bipolar transistor group comprises an eleventh insulated gate bipolar transistor and a twelfth insulated gate bipolar transistor, and an emitter of the tenth insulated gate bipolar transistor is electrically connected with a collector of the twelfth insulated gate bipolar transistor and is electrically connected with one path of an external three-phase asynchronous motor;
the collector of the seventh insulated gate bipolar transistor, the collector of the ninth insulated gate bipolar transistor and the collector of the eleventh insulated gate bipolar transistor are electrically connected with each other;
the emitter of the eighth insulated gate bipolar transistor, the emitter of the tenth insulated gate bipolar transistor, and the emitter of the twelfth insulated gate bipolar transistor are electrically connected to each other.
7. The energy storage type variable frequency transmission device according to claim 1, wherein the detection control unit comprises a voltage transformer, a current transformer and a signal processor;
the voltage transformer is used for collecting voltage values of the rectifying/inverting unit, the energy storage capacitor and the inverting unit;
the current transformer is used for collecting current values of the rectifying/inverting unit, the energy storage capacitor and the inverting unit;
the signal processor is used for receiving and processing the voltage value and the current value, obtaining pulse width modulation signals and sending the pulse width modulation signals to the rectifying/inverting unit and the inverting unit to realize dynamic adjustment.
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| CN202111261702.1A CN116054598A (en) | 2021-10-28 | 2021-10-28 | Energy-storage type variable-frequency transmission device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117674238A (en) * | 2024-01-31 | 2024-03-08 | 啸驰电气股份有限公司 | Energy storage frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117674238A (en) * | 2024-01-31 | 2024-03-08 | 啸驰电气股份有限公司 | Energy storage frequency converter |
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