CN220964684U - Energy-saving frequency conversion control circuit - Google Patents
Energy-saving frequency conversion control circuit Download PDFInfo
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- CN220964684U CN220964684U CN202322413824.9U CN202322413824U CN220964684U CN 220964684 U CN220964684 U CN 220964684U CN 202322413824 U CN202322413824 U CN 202322413824U CN 220964684 U CN220964684 U CN 220964684U
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Abstract
The utility model discloses an energy-saving frequency conversion control circuit, which relates to the technical field of frequency conversion energy-saving control and comprises a frequency conversion control module, a power supply module and a motor module, wherein the frequency conversion control module is used for performing frequency conversion control on electric energy output by the power supply module and driving the motor module to work; the frequency conversion state detection module is used for detecting a frequency conversion state; the electric quantity detection module is used for detecting the electric quantity of the energy storage module; the charging and discharging control module is used for controlling the energy storage module to store regenerated electric energy when the variable frequency control module does not work and controlling the discharging work of the energy storage module when the variable frequency control module is full of electricity; and the input control module is used for disconnecting the power supply electric energy when the charge and discharge control module works. The energy-saving variable frequency control circuit provided by the utility model has the advantages that the variable frequency state detection module detects the variable frequency state, when the variable frequency control module does not work, the charge and discharge control module controls the energy storage module to store regenerated electric energy, meanwhile, the input control module is controlled to disconnect the electric energy supply, and when the energy storage module is full of electricity, the discharge work of the charge and discharge control module is automatically controlled and the electric energy supply is disconnected.
Description
Technical Field
The utility model relates to the technical field of frequency conversion energy-saving control, in particular to an energy-saving frequency conversion control circuit.
Background
The utility model provides a frequency conversion control circuit, a circuit of controlling the motor through changing motor working power supply frequency mode, when frequency conversion control circuit stops controlling the motor, because the inertia of motor, can be with kinetic energy or potential energy conversion to the electric energy, the regenerated electric energy promptly, in order to avoid the influence of regenerated electric energy to the circuit, current frequency conversion control circuit can adopt energy feedback device to store regenerated electric energy, in order to reach energy recycling and energy-conserving effect, but when carrying out the regenerated energy storage, in order to avoid forming parallel power supply with the main power supply, and lead to the circuit damage, need manual disconnection main power supply, and when energy feedback device is full of discharging, in order to avoid forming parallel power supply with the main power supply, also need manual disconnection main power supply, comparatively trouble and circuit security are lower, therefore need to improve.
Disclosure of utility model
The embodiment of the utility model provides an energy-saving frequency conversion control circuit for solving the problems in the background technology.
According to an embodiment of the present utility model, there is provided an energy-saving variable frequency control circuit, including: the device comprises a power supply module, an input control module, a variable frequency control module, a motor module, a variable frequency state detection module, a charge and discharge control module, an energy storage module and an electric quantity detection module;
the power supply module is used for providing first three-phase alternating current electric energy, rectifying and filtering the first three-phase alternating current electric energy and outputting direct current electric energy;
the frequency conversion control module is connected with the input control module and the charge-discharge control module, and is used for outputting pulse signals through the micro control circuit and controlling the work of the frequency conversion circuit, and is used for carrying out frequency conversion processing on the electric energy transmitted by the input control module and the electric energy output by the charge-discharge control module through the frequency conversion circuit and outputting second three-phase alternating-current electric energy;
The motor module is connected with the variable frequency control module and is used for receiving the second three-phase alternating current electric energy and controlling the work of the alternating current motor;
The variable frequency state detection module is connected with the variable frequency control module, the input control module and the charge-discharge control module, and is used for rectifying the pulse signals output by the variable frequency control module and outputting first control signals, and controlling the charge-discharge control module and the input control module to work through the first control signals;
The electric quantity detection module is connected with the energy storage module, the charge-discharge control module and the input control module, and is used for detecting the electric quantity of the energy storage module, comparing the detected signal with a set electric quantity threshold in a hysteresis way, and outputting a second control signal and controlling the charge-discharge control module and the input control module to work;
The charge-discharge control module is connected with the energy storage module and is used for receiving the first control signal through a charge-discharge control circuit and transmitting regenerated electric energy generated by the variable frequency control module to the energy storage module, and the charge-discharge control module is used for receiving the second control signal through the charge-discharge control circuit and performing boost-discharge control on electric energy output by the energy storage module;
The input control module is used for receiving the direct current electric energy through the input control circuit and transmitting the received direct current electric energy to the variable frequency control circuit, and is used for controlling the input control circuit to stop the transmission work of the electric energy through the first control signal and the second control signal;
The energy storage module is used for receiving the electric energy transmitted by the charge-discharge control module and providing electric energy for the charge-discharge control circuit.
Compared with the prior art, the utility model has the beneficial effects that: the energy-saving variable frequency control circuit is used for performing variable frequency control by the variable frequency control circuit, the variable frequency state detection module is used for detecting the variable frequency state, and when the module is not in variable frequency operation, the charging operation of the charge-discharge control module is automatically controlled, so that the energy storage module stores the generated regenerated electric energy, meanwhile, the input control module is controlled to disconnect the electric energy supply of the power supply module, the circuit damage caused by the parallel connection of different voltages is avoided, and when the energy storage module is full of electricity, the electric energy detection module is used for automatically controlling the discharge operation of the charge-discharge control module, so that the energy-saving effect of the variable frequency control circuit is improved, meanwhile, the input control module is controlled to disconnect the electric energy supply of the power supply module, the influence caused by the parallel connection of the voltages is further avoided, the safety of the circuit is improved, and the manpower resource is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of an energy-saving frequency conversion control circuit according to an embodiment of the present utility model.
Fig. 2 is a circuit diagram of an energy-saving frequency conversion control circuit provided by the embodiment of the utility model.
Fig. 3 is a circuit diagram of a connection of an electric quantity detection module according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In one embodiment, referring to fig. 1, an energy-saving frequency conversion control circuit includes: the device comprises a power supply module 1, an input control module 2, a variable frequency control module 3, a motor module 4, a variable frequency state detection module 5, a charge and discharge control module 6, an energy storage module 7 and an electric quantity detection module 8;
Specifically, the power module 1 is configured to provide a first three-phase ac power, and perform rectifying and filtering processing on the first three-phase ac power and output dc power;
The frequency conversion control module 3 is connected with the input control module 2 and the charge-discharge control module 6, and is used for outputting pulse signals through the micro control circuit and controlling the work of the frequency conversion circuit, and is used for carrying out frequency conversion treatment on the electric energy transmitted by the input control module 2 and the electric energy output by the charge-discharge control module 6 through the frequency conversion circuit and outputting second three-phase alternating-current electric energy;
The motor module 4 is connected with the variable frequency control module 3 and is used for receiving the second three-phase alternating current electric energy and controlling the work of the alternating current motor;
The variable frequency state detection module 5 is connected with the variable frequency control module 3, the input control module 2 and the charge-discharge control module 6, and is used for rectifying the pulse signals output by the variable frequency control module 3 and outputting first control signals, and controlling the charge-discharge control module 6 and the input control module 2 to work through the first control signals;
The electric quantity detection module 8 is connected with the energy storage module 7, the charge-discharge control module 6 and the input control module 2, and is used for detecting the electric quantity of the energy storage module 7, performing hysteresis comparison on a detected signal and a set electric quantity threshold value, and outputting a second control signal and controlling the charge-discharge control module 6 and the input control module 2 to work;
The charge-discharge control module 6 is connected with the energy storage module 7, and is used for receiving the first control signal through a charge-discharge control circuit and transmitting the regenerated electric energy generated by the variable frequency control module 3 to the energy storage module 7, and is used for receiving the second control signal through the charge-discharge control circuit and performing boost discharge control on the electric energy output by the energy storage module 7;
The input control module 2 is used for receiving the direct-current electric energy through the input control circuit and transmitting the received direct-current electric energy to the variable-frequency control circuit, and is used for controlling the input control circuit to stop the transmission work of the electric energy through the first control signal and the second control signal;
And the energy storage module 7 is used for receiving the electric energy transmitted by the charge-discharge control module 6 and providing electric energy for the charge-discharge control circuit.
In a specific embodiment, the power module 1 may employ a power supply circuit and a rectifying and filtering circuit, where the power supply circuit provides three-phase ac power, and the rectifying and filtering circuit performs rectifying and filtering processing and outputs dc power; the input control module 2 can adopt an input control circuit, and transmits the electric energy output by the power supply module 1 and is controlled by the variable frequency state detection module 5 and the electric quantity detection module 8; the frequency conversion control module 3 can adopt a micro-control circuit and a frequency conversion circuit, and the micro-control circuit outputs pulse signals and controls the frequency conversion work of the frequency conversion circuit; the motor module 4 may be an ac motor, which is not described herein; the variable frequency state detection module 5 can adopt a rectification circuit to rectify the pulse signal output by the variable frequency control module 3 and control the work of the charge-discharge control module 6 and the input control module 2; the charge-discharge control module 6 can adopt a charge-discharge control circuit formed by a charge circuit and a boost-discharge circuit, the charge circuit provides electric energy for the energy storage module 7, and the boost-discharge circuit carries out boost-discharge treatment on the electric energy output by the energy storage module 7; the energy storage module 7 can adopt an energy storage device to store and release energy; the above-mentioned electric quantity detection module 8 may employ an electric quantity detection circuit and an electric quantity hysteresis comparison circuit, where the electric quantity detection circuit detects the electric quantity condition of the energy storage module 7, and the electric quantity hysteresis comparison circuit compares the detected signal with a set electric quantity threshold value, so as to determine the full-power state of the energy storage module 7.
In another embodiment, referring to fig. 1, 2 and 3, the power module 1 includes a three-phase power source, a three-phase rectifying device J1 and a first capacitor C1; the input control module 2 comprises a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1, a first power tube Q1, a first switch tube VT1, a second switch tube VT2 and a second diode D2;
Specifically, the three-phase power supply is connected with the input end of the three-phase rectifying device J1, the first output end of the three-phase rectifying device J1 is connected with one end of the first capacitor C1, one end of the second resistor R2 and the anode of the second diode D2, the other end of the second resistor R2 is connected with one end of the first resistor R1, the cathode of the first voltage stabilizing tube, one end of the third resistor R3, the emitter of the first switch tube VT1 and the collector of the second switch tube VT2, the second output end of the three-phase rectifying device J1 is connected with the other end of the first capacitor C1, the other end of the first resistor R1, the anode of the first voltage stabilizing tube and the source of the first power tube Q1, the gate of the first power tube Q1 is connected with the other end of the third resistor R3, the drain of the first power tube Q1 is connected with the collector of the first switch tube VT1 and the emitter of the second switch tube VT2, the cathode of the second diode D2 is connected with the charge-discharge control module 6, and the base of the first switch tube VT1 and the second switch tube VT2 are respectively connected with the variable frequency state detection module 5 and the electric quantity detection module 8.
In a specific embodiment, the first power transistor Q1 may be an N-channel enhancement type MOS transistor, and the first resistor R1, the second resistor R2, the third resistor R3, the first diode D1, the first switching transistor VT1, the second switching transistor VT2, and the second diode D2 are combined to form an input control circuit, where the first switching transistor VT1 may be a PNP type triode, the second switching transistor VT2 may be an NPN type triode, and the turn-off state of the first power transistor Q1 may be controlled.
Further, the charge-discharge control module 6 includes a second power tube Q2, a third power tube Q3, a third diode D3 and a boost device; the energy storage module 7 comprises an energy storage device;
Specifically, the source electrode of the second power tube Q2 is connected to the cathode of the second diode D2 and the cathode of the third diode D3, the drain electrode of the second power tube Q2 is connected to the first end of the energy storage device and the drain electrode of the third power tube Q3, the second end of the energy storage device is grounded, the gate electrode of the third power tube Q3 is connected to the electric quantity detection module 8, the source electrode of the third power tube Q3 is connected to the anode of the third diode D3 through the voltage boosting device, and the gate electrode of the second power tube Q2 is connected to the variable frequency state detection module 5.
In a specific embodiment, the second power tube Q2 and the third power tube Q3 may be N-channel enhancement type MOS tubes, where the second power tube Q2 is a charging circuit, and the third power tube Q3 is matched with a boosting device and a third diode D3 to form a boosting discharge circuit.
Further, the power detection module 8 includes a sixth resistor R6, a fifth resistor R5, a twelfth electrode tube D10, a first comparator A1, a first threshold device, and a seventh resistor R7;
Specifically, one end of the fifth resistor R5 is connected to the first end of the energy storage device, the other end of the fifth resistor R5 is connected to the in-phase end of the first comparator A1 and the cathode of the twelfth pole tube D10, and is connected to the second end of the energy storage device through the sixth resistor R6, the output end of the first comparator A1 is connected to the anode of the tenth resistor, one end of the seventh resistor R7 and the gate of the third power tube Q3, the other end of the seventh resistor R7 is connected to the base of the second switching tube VT2, and the inverting end of the first comparator A1 is connected to the first threshold device.
In a specific embodiment, the sixth resistor R6 and the fifth resistor R5 form an electric quantity detection circuit; the first comparator A1 may be an LM393 comparator, and is matched with a tenth diode D10, a first threshold device, and a seventh resistor R7 to form an electric quantity hysteresis comparison circuit, where the first threshold device is used for providing an electric quantity threshold value of full power.
Further, the frequency conversion control module 3 comprises a first frequency converter J2 and a first frequency conversion controller; the motor module 4 comprises an alternating current motor;
Specifically, the input end of the first frequency converter J2 is connected to the cathode of the second diode D2, the ground end of the first frequency converter J2 is connected to the drain electrode of the first power tube Q1, the output end of the first frequency converter J2 is connected to the ac motor, and the first control end, the second control end, the third control end, the fourth control end, the fifth control end and the sixth control end of the first frequency converter J2 are respectively connected to the first end, the second end, the third end, the fourth end, the fifth end and the sixth end of the first frequency converter controller.
In a specific embodiment, the first frequency converter J2 may be a three-phase frequency converter composed of IGBTs, and may invert dc power into three-phase ac power and change the power frequency; the first frequency conversion controller is optional, but is not limited to an STM32 single-chip microcomputer, integrates a plurality of components such as an arithmetic unit, a controller, a memory, an input/output unit and the like, and realizes functions such as signal processing, data storage, module control, timing control and the like, thereby completing the frequency conversion control of the first frequency converter J2.
Further, the variable frequency state detection module 5 includes a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, and a fourth resistor R4;
Specifically, the anode of the fourth diode D4, the anode of the fifth diode D5, the anode of the sixth diode D6, the anode of the seventh diode D7, the anode of the eighth diode D8, and the anode of the ninth diode D9 are respectively connected to the first end, the second end, the third end, the fourth end, the fifth end, and the sixth end of the first inverter controller, and the cathode of the fourth diode D4 is connected to the cathode of the fifth diode D5, the cathode of the sixth diode D6, the cathode of the seventh diode D7, the cathode of the eighth diode D8, the cathode of the ninth diode D9, the gate of the second power tube Q2, and the base of the first switch tube VT1, and is connected to the ground of the first inverter J2 through the fourth resistor R4.
In a specific embodiment, the fourth diode D4, the fifth diode D5, the sixth diode D6, the seventh diode D7, the eighth diode D8, and the ninth diode D9 respectively rectify the pulse signals output from the first end, the second end, the third end, the fourth end, the fifth end, and the sixth end of the first variable frequency controller, so as to detect that the first variable frequency controller controls the first variable frequency device J2 to operate.
According to the energy-saving variable frequency control circuit, three-phase alternating current power output by a three-phase rectifying device J1 and a first capacitor C1 are subjected to rectifying and filtering treatment, a first power tube Q1 is controlled to be conducted, so that power is transmitted to a first frequency converter J2, the first frequency converter J2 is controlled to perform inversion and variable frequency operation so as to drive an alternating current motor, when the first frequency converter controller stops controlling the operation of the first frequency converter J2, a second power tube Q2 and a first switching tube VT1 are in a conducting state, regenerated power generated by inertia of the alternating current motor is stored by an energy storage device, the first power tube Q1 is controlled to be cut off, power output by the three-phase rectifying device J1 is disconnected, the electric quantity of the energy storage device is detected by a fifth resistor R5 and a sixth resistor R6, whether the energy storage device is full of electricity is matched with the first comparator A1 and the first threshold device, if the energy storage device is full of electricity, the first comparator A1 outputs high level, the second switching tube VT2 is controlled, the third power tube Q3 is conducted, the three-phase rectifying device J3 is disconnected, and the power output by the first frequency converter J2 is powered up, and the power is simultaneously conducted by the energy storage device.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. An energy-saving frequency conversion control circuit is characterized in that,
The energy-saving frequency conversion control circuit comprises: the device comprises a power supply module, an input control module, a variable frequency control module, a motor module, a variable frequency state detection module, a charge and discharge control module, an energy storage module and an electric quantity detection module;
the power supply module is used for providing first three-phase alternating current electric energy, rectifying and filtering the first three-phase alternating current electric energy and outputting direct current electric energy;
the frequency conversion control module is connected with the input control module and the charge-discharge control module, and is used for outputting pulse signals through the micro control circuit and controlling the work of the frequency conversion circuit, and is used for carrying out frequency conversion processing on the electric energy transmitted by the input control module and the electric energy output by the charge-discharge control module through the frequency conversion circuit and outputting second three-phase alternating-current electric energy;
The motor module is connected with the variable frequency control module and is used for receiving the second three-phase alternating current electric energy and controlling the work of the alternating current motor;
The variable frequency state detection module is connected with the variable frequency control module, the input control module and the charge-discharge control module, and is used for rectifying the pulse signals output by the variable frequency control module and outputting first control signals, and controlling the charge-discharge control module and the input control module to work through the first control signals;
The electric quantity detection module is connected with the energy storage module, the charge-discharge control module and the input control module, and is used for detecting the electric quantity of the energy storage module, comparing the detected signal with a set electric quantity threshold in a hysteresis way, and outputting a second control signal and controlling the charge-discharge control module and the input control module to work;
The charge-discharge control module is connected with the energy storage module and is used for receiving the first control signal through a charge-discharge control circuit and transmitting regenerated electric energy generated by the variable frequency control module to the energy storage module, and the charge-discharge control module is used for receiving the second control signal through the charge-discharge control circuit and performing boost-discharge control on electric energy output by the energy storage module;
The input control module is used for receiving the direct current electric energy through the input control circuit and transmitting the received direct current electric energy to the variable frequency control circuit, and is used for controlling the input control circuit to stop the transmission work of the electric energy through the first control signal and the second control signal;
The energy storage module is used for receiving the electric energy transmitted by the charge-discharge control module and providing electric energy for the charge-discharge control circuit.
2. The energy-saving frequency conversion control circuit according to claim 1, wherein the power supply module comprises a three-phase power supply, a three-phase rectifying device and a first capacitor; the input control module comprises a first resistor, a second resistor, a third resistor, a first diode, a first power tube, a first switching tube, a second switching tube and a second diode;
The three-phase power supply is connected with the input end of the three-phase rectifying device, the first output end of the three-phase rectifying device is connected with one end of the first capacitor, one end of the second resistor and the anode of the second diode, the other end of the second resistor is connected with one end of the first resistor, the cathode of the first voltage stabilizing tube, one end of the third resistor, the emitter of the first switching tube and the collector of the second switching tube, the second output end of the three-phase rectifying device is connected with the other end of the first capacitor, the other end of the first resistor, the anode of the first voltage stabilizing tube and the source of the first power tube, the grid of the first power tube is connected with the other end of the third resistor, the drain of the first power tube is connected with the collector of the first switching tube and the emitter of the second switching tube, the cathode of the second diode is connected with the charge-discharge control module, and the base of the first switching tube and the collector of the second switching tube are respectively connected with the variable frequency state detection module and the electric quantity detection module.
3. The energy-saving frequency conversion control circuit according to claim 2, wherein the charge-discharge control module comprises a second power tube, a third diode and a boosting device; the energy storage module comprises an energy storage device;
the source electrode of the second power tube is connected with the cathode of the second diode and the cathode of the third diode, the drain electrode of the second power tube is connected with the first end of the energy storage device and the drain electrode of the third power tube, the second end of the energy storage device is grounded, the grid electrode of the third power tube is connected with the electric quantity detection module, the source electrode of the third power tube is connected with the anode of the third diode through the boosting device, and the grid electrode of the second power tube is connected with the variable frequency state detection module.
4. The energy-saving frequency conversion control circuit according to claim 3, wherein the electric quantity detection module comprises a sixth resistor, a fifth resistor, a twelfth electrode tube, a first comparator, a first threshold device and a seventh resistor;
One end of the fifth resistor is connected with the first end of the energy storage device, the other end of the fifth resistor is connected with the same-phase end of the first comparator and the cathode of the twelfth pole tube and is connected with the second end of the energy storage device through the sixth resistor, the output end of the first comparator is connected with the anode of the tenth resistor, one end of the seventh resistor and the grid electrode of the third power tube, the other end of the seventh resistor is connected with the base electrode of the second switch tube, and the inverting end of the first comparator is connected with the first threshold device.
5. The energy-saving variable frequency control circuit according to claim 4, wherein the variable frequency control module comprises a first frequency converter and a first variable frequency controller; the motor module comprises an alternating current motor;
The input end of the first frequency converter is connected with the cathode of the second diode, the grounding end of the first frequency converter is connected with the drain electrode of the first power tube, the output end of the first frequency converter is connected with the alternating current motor, and the first control end, the second control end, the third control end, the fourth control end, the fifth control end and the sixth control end of the first frequency converter are respectively connected with the first end, the second end, the third end, the fourth end, the fifth end and the sixth end of the first frequency converter.
6. The energy-saving frequency conversion control circuit according to claim 5, wherein the frequency conversion state detection module comprises a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode and a fourth resistor;
The anode of the fourth diode, the anode of the fifth diode, the anode of the sixth diode, the anode of the seventh diode, the anode of the eighth diode and the anode of the ninth diode are respectively connected with the first end, the second end, the third end, the fourth end, the fifth end and the sixth end of the first variable frequency controller, the cathode of the fourth diode is connected with the cathode of the fifth diode, the cathode of the sixth diode, the cathode of the seventh diode, the cathode of the eighth diode, the cathode of the ninth diode, the grid electrode of the second power tube and the base electrode of the first switch tube, and the cathode of the fourth diode is connected with the grounding end of the first frequency converter through a fourth resistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322413824.9U CN220964684U (en) | 2023-09-06 | 2023-09-06 | Energy-saving frequency conversion control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322413824.9U CN220964684U (en) | 2023-09-06 | 2023-09-06 | Energy-saving frequency conversion control circuit |
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| CN220964684U true CN220964684U (en) | 2024-05-14 |
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| CN202322413824.9U Active CN220964684U (en) | 2023-09-06 | 2023-09-06 | Energy-saving frequency conversion control circuit |
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