CN116800115A - Double full-bridge rectifying circuit for frequency conversion equipment and working mode of double full-bridge rectifying circuit - Google Patents
Double full-bridge rectifying circuit for frequency conversion equipment and working mode of double full-bridge rectifying circuit Download PDFInfo
- Publication number
- CN116800115A CN116800115A CN202310763225.1A CN202310763225A CN116800115A CN 116800115 A CN116800115 A CN 116800115A CN 202310763225 A CN202310763225 A CN 202310763225A CN 116800115 A CN116800115 A CN 116800115A
- Authority
- CN
- China
- Prior art keywords
- full
- bridge
- rectifying circuit
- bridge rectifier
- variable frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/23—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in parallel
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a double full-bridge rectifying circuit for frequency conversion equipment and a working mode thereof, wherein the double full-bridge rectifying circuit comprises a safety device, a first part full-bridge rectifying circuit connected with the safety device, a frequency conversion driving element connected with the first part full-bridge rectifying circuit, a frequency conversion motor connected with the frequency conversion driving element, a second part full-bridge rectifying circuit, a switching power supply connected with the second part full-bridge rectifying circuit and a main control MCU connected with the switching power supply, the first part full-bridge rectifying circuit comprises a first full-bridge rectifier and a first filter capacitor, the second part full-bridge rectifying circuit comprises a second full-bridge rectifier and a second filter capacitor, and the first filter capacitor and the second filter capacitor are connected through a diode. The invention improves the safety and reliability of the whole frequency conversion equipment and improves the output quality of a switching power supply in the frequency conversion equipment.
Description
Technical field:
the invention relates to a double full-bridge rectifying circuit for frequency conversion equipment and a working mode thereof, belonging to the technical field of household appliances and industrial frequency conversion.
The background technology is as follows:
in order to ensure the personal safety of the operators in the operation of the variable frequency washing machine and other industrial and household variable frequency equipment, the motor of the variable frequency equipment needs to be enabled to normally operate after a safety device (a door switch, a safety switch, a grating, a door lock, and other linkage relay contactor contacts) is effective. In order to prevent the equipment from being damaged and malfunction during operation, the equipment needs to be controlled when the power is accidentally cut off.
The invention comprises the following steps:
the invention aims to solve the problems in the prior art and provides a double full-bridge rectifying circuit for frequency conversion equipment and a working mode thereof, so that the safety and reliability of the whole frequency conversion equipment are improved, and the output quality of a switching power supply in the frequency conversion equipment is improved.
The invention adopts the following technical scheme: the utility model provides a double full-bridge rectifier circuit for frequency conversion equipment, includes safety device, the first partial full-bridge rectifier circuit of being connected with safety device, the frequency conversion driving element who is connected with the first partial full-bridge rectifier circuit and the variable frequency motor who is connected with the frequency conversion driving element, second partial full-bridge rectifier circuit, the switching power supply who is connected with the second partial full-bridge rectifier circuit and the master control MCU who is connected with switching power supply, first partial full-bridge rectifier circuit includes first full-bridge rectifier and first filter capacitor, second partial full-bridge rectifier circuit includes second full-bridge rectifier and second filter capacitor, first filter capacitor and second filter capacitor pass through the diode connection.
Further, an anode of the diode is connected with an anode of a first filter capacitor in the first part full-bridge rectifying circuit, and a cathode of the diode is connected with an anode of a second filter capacitor in the second part full-bridge rectifying circuit.
Further, the safety device is a door switch, a safety switch, a grating, a door lock or a relay contactor contact.
Further, the variable frequency driving element comprises an IPM, an IGBT or an MOS tube.
The invention also adopts the following technical scheme: the working mode of the double full-bridge rectifying circuit for the frequency conversion equipment comprises the following steps:
the first part full-bridge rectifier circuit is used for connecting the mains supply in series through the safety device and then connecting the first full-bridge rectifier and the high-capacity first filter capacitor, and the voltage subjected to full-bridge rectification and filtering by the first part full-bridge rectifier circuit is output to the variable frequency driving element;
and the second part full-bridge rectifier circuit is used for directly connecting the mains supply with a second path full-bridge rectifier and a small-capacity second filter capacitor, and the voltage subjected to full-bridge rectification and filtering by the second part full-bridge rectifier circuit is output to the switching power supply, so that the switching power supply circuit generates stable voltage required by the operation of the main control MCU.
Further, when the safety device is effective, the first part full-bridge rectifying circuit and the second part full-bridge rectifying circuit can be connected into the mains supply, the first part full-bridge rectifying circuit generates voltage required by the operation of the variable frequency driving element, the second part full-bridge rectifying circuit generates power supply voltage required by the main control MCU of the variable frequency equipment, and the variable frequency equipment integrally and normally operates.
Further, when the safety device is not effective, the first part full-bridge rectifying circuit cannot be connected to the mains supply, the first part full-bridge rectifying circuit cannot generate voltage required by the operation of the variable frequency driving element, and the second part full-bridge rectifying circuit is connected to the mains supply and generates power supply voltage required by the main control MCU of the variable frequency device, so that the variable frequency device can normally work except the variable frequency driving element.
Further, when the mains supply is suddenly powered off in the operation process, the first part full-bridge rectifying circuit and the second part full-bridge rectifying circuit are not connected with the mains supply, the variable frequency motor continues to operate under the action of inertia and generates power to the first part full-bridge rectifying circuit, the variable frequency driving element can normally supply power to continue to operate, the first part full-bridge rectifying circuit supplies power to the second part full-bridge rectifying circuit through the diode, and the switching power supply circuit and the main control MCU also normally work so as to ensure that the variable frequency motor cannot be out of control under the power-off condition.
The invention has the following beneficial effects: the double full-bridge rectifying circuit for the frequency conversion equipment comprises two parts of full-bridge rectifying and filtering circuits, the two parts of circuits respectively supply power to the frequency conversion driving element and the main control MCU part, the two parts of circuits are connected through diodes, and the safety device is connected in series to the path for supplying power to the frequency conversion driving element. The invention improves the safety and reliability of the whole frequency conversion equipment and improves the output quality of a switching power supply in the frequency conversion equipment.
Description of the drawings:
fig. 1 is a schematic diagram of a double full-bridge rectifier circuit for a frequency conversion device according to the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings.
The invention discloses a double full-bridge rectifying circuit for frequency conversion equipment, which comprises a safety device, a first part full-bridge rectifying circuit connected with the safety device, a frequency conversion driving element connected with the first part full-bridge rectifying circuit, a frequency conversion motor connected with the frequency conversion driving element, a second part full-bridge rectifying circuit, a switching power supply connected with the second part full-bridge rectifying circuit and a main control MCU connected with the switching power supply, wherein the first part full-bridge rectifying circuit comprises a first full-bridge rectifier and a first filter capacitor, the second part full-bridge rectifying circuit comprises a second full-bridge rectifier and a second filter capacitor, and the first filter capacitor and the second filter capacitor are connected through a diode.
The safety device is a door switch, a safety switch, a grating, a door lock and other linkage relay contactor contacts.
The variable frequency driving element comprises IPM, IGBT, MOS pipe and other power devices.
The first part full-bridge rectifier circuit is used for connecting the commercial power in series through the safety device and then connecting the first full-bridge rectifier and the high-capacity first filter capacitor, and the voltage after full-bridge rectification and filtering by the first part full-bridge rectifier circuit is output to the variable frequency driving element. This enables the first part of the full-bridge rectifier circuit to be connected to the mains supply to generate the voltage required for the operation of the variable frequency drive element only after the safety device has been validated.
And the second part full-bridge rectifier circuit is used for directly connecting the mains supply with a second path full-bridge rectifier and a small-capacity second filter capacitor, and the voltage subjected to full-bridge rectification and filtering by the second part full-bridge rectifier circuit is output to the switching power supply, so that the switching power supply circuit generates stable voltage required by the operation of the main control MCU.
The anode of the diode is connected with the anode of the first filter capacitor in the first part full-bridge rectifying circuit, and the cathode of the diode is connected with the anode of the second filter capacitor in the second part full-bridge rectifying circuit. The diode plays a role in preventing reverse flow, only allows the first part full-bridge rectifying circuit to supply power to the second part full-bridge rectifying circuit, and does not allow the second part full-bridge rectifying circuit to supply power to the first part full-bridge rectifying circuit.
When the safety device is effective, the first part full-bridge rectifying circuit and the second part full-bridge rectifying circuit can be connected into the mains supply, the first part full-bridge rectifying circuit generates voltage required by the working of the variable frequency driving element, the second part full-bridge rectifying circuit generates power supply voltage required by the main control MCU of the variable frequency device, and the whole variable frequency device can normally operate.
When the safety device is not in effect, the first part of full-bridge rectifying circuit cannot be connected to the mains supply, the first part of full-bridge rectifying circuit cannot generate voltage required by the operation of the variable frequency driving element, the second part of full-bridge rectifying circuit can be connected to the mains supply and generate power supply voltage required by the main control MCU of the variable frequency device, so that the variable frequency device can normally operate except the variable frequency driving element, and the variable frequency motor cannot operate at the moment and is safe and reliable in use.
When the mains supply is suddenly powered off in the operation process, the first part full-bridge rectifying circuit and the second part full-bridge rectifying circuit are not connected with the mains supply, the variable frequency motor continues to operate under the action of inertia and generates power for the first part full-bridge rectifying circuit, the variable frequency driving element can normally continue to operate, the first part full-bridge rectifying circuit supplies power for the second part full-bridge rectifying circuit through the diode, the switching power supply circuit and the main control MCU can normally operate, and therefore the variable frequency motor can not be out of control under the condition of power failure, and the overall safety and reliability are improved.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (8)
1. The utility model provides a frequency conversion equipment is with two full-bridge rectifier circuit which characterized in that: the full-bridge rectifier circuit comprises a first full-bridge rectifier and a first filter capacitor, wherein the first full-bridge rectifier circuit is connected with the safety device, a variable frequency driving element connected with the first full-bridge rectifier circuit, a variable frequency motor connected with the variable frequency driving element, a second full-bridge rectifier circuit, a switching power supply connected with the second full-bridge rectifier circuit and a main control MCU connected with the switching power supply, the second full-bridge rectifier circuit comprises a second full-bridge rectifier and a second filter capacitor, the first filter capacitor and the second filter capacitor are connected through a diode, and the first filter capacitor supplies power to the second filter capacitor through the diode.
2. The double full-bridge rectifier circuit for a frequency conversion device according to claim 1, wherein: the anode of the diode is connected with the anode of the first filter capacitor in the first part full-bridge rectifying circuit, and the cathode of the diode is connected with the anode of the second filter capacitor in the second part full-bridge rectifying circuit.
3. The double full-bridge rectifier circuit for a frequency conversion device according to claim 1, wherein: the safety device is a door switch, a safety switch, a grating, a door lock or a relay contactor contact.
4. A double full bridge rectifier circuit for a frequency conversion device according to claim 3, wherein: the variable frequency driving element comprises an IPM, an IGBT or an MOS tube.
5. The utility model provides a frequency conversion equipment is with two full bridge rectifier circuit's mode which characterized in that: the method comprises the following steps:
the first part full-bridge rectifier circuit is used for connecting the mains supply in series through the safety device and then connecting the first full-bridge rectifier and the high-capacity first filter capacitor, and the voltage subjected to full-bridge rectification and filtering by the first part full-bridge rectifier circuit is output to the variable frequency driving element;
and the second part full-bridge rectifier circuit is used for directly connecting the mains supply with a second path full-bridge rectifier and a small-capacity second filter capacitor, and the voltage subjected to full-bridge rectification and filtering by the second part full-bridge rectifier circuit is output to the switching power supply, so that the switching power supply circuit generates stable voltage required by the operation of the main control MCU.
6. The operation mode of the double full-bridge rectifier circuit for the frequency conversion device according to claim 5, wherein:
when the safety device is effective, the first part full-bridge rectifying circuit and the second part full-bridge rectifying circuit can be connected into the mains supply, the first part full-bridge rectifying circuit generates voltage required by the operation of the variable frequency driving element, the second part full-bridge rectifying circuit generates power supply voltage required by the main control MCU of the variable frequency equipment, and the variable frequency equipment integrally and normally operates.
7. The operation mode of the double full-bridge rectifier circuit for the frequency conversion device according to claim 6, wherein:
when the safety device is not effective, the first part full-bridge rectifying circuit cannot be connected to the mains supply, the first part full-bridge rectifying circuit cannot generate voltage required by the operation of the variable frequency driving element, and the second part full-bridge rectifying circuit is connected to the mains supply and generates power supply voltage required by the main control MCU of the variable frequency device, so that the variable frequency device can normally operate except the variable frequency driving element.
8. The operation mode of the double full-bridge rectifier circuit for the frequency conversion device according to claim 7, wherein:
when the mains supply is suddenly powered off in the operation process, the first part full-bridge rectifying circuit and the second part full-bridge rectifying circuit are not connected with the mains supply, the variable frequency motor continues to operate under the action of inertia and generates power for the first part full-bridge rectifying circuit, the variable frequency driving element can normally supply power to the variable frequency driving element to continue to operate, the first part full-bridge rectifying circuit supplies power for the second part full-bridge rectifying circuit through the diode, and the switching power supply circuit and the main control MCU also normally work so as to ensure that the variable frequency motor cannot be out of control under the condition of power failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310763225.1A CN116800115A (en) | 2023-06-27 | 2023-06-27 | Double full-bridge rectifying circuit for frequency conversion equipment and working mode of double full-bridge rectifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310763225.1A CN116800115A (en) | 2023-06-27 | 2023-06-27 | Double full-bridge rectifying circuit for frequency conversion equipment and working mode of double full-bridge rectifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116800115A true CN116800115A (en) | 2023-09-22 |
Family
ID=88038417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310763225.1A Pending CN116800115A (en) | 2023-06-27 | 2023-06-27 | Double full-bridge rectifying circuit for frequency conversion equipment and working mode of double full-bridge rectifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116800115A (en) |
-
2023
- 2023-06-27 CN CN202310763225.1A patent/CN116800115A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105356816A (en) | Multi-type fault tolerance system for switched reluctance motor based on relay network | |
| CN111232776A (en) | Band-type brake control device and method for slope starting of output voltage | |
| CN113089259A (en) | Three-in-one full-direct-current variable frequency drive integrated control system in washing machine and control method thereof | |
| CN103434899A (en) | Integrated controller for elevator | |
| CN105743374A (en) | Topological structure and control method optimized low-voltage ride through power supply apparatus used for frequency converter | |
| CN101635516A (en) | Static safe energy-saving controller with zero power consumption | |
| CN101539783B (en) | Automatic pumping controller | |
| CN116800115A (en) | Double full-bridge rectifying circuit for frequency conversion equipment and working mode of double full-bridge rectifying circuit | |
| CN202949231U (en) | Intelligent zero-crossing switching silicon controlled combination switch | |
| CN202837868U (en) | Standby zero power consumption circuit and dishwasher | |
| CN110224580B (en) | Digital power supply starting method, starting circuit and digital power supply | |
| CN201878065U (en) | SS controller for DC oil pump in generating station | |
| CN102957157B (en) | Silicon controlled composite switch of intelligent zero-crossing switching | |
| CN103023044B (en) | Combination switch with intelligent zero-crossing switching function | |
| CN105471241A (en) | Mechanical contactor based two-path-power-supply high-voltage frequency converter unit bypass apparatus | |
| CN202513853U (en) | Electric sewing machine no-load energy saving unit based on Hall sensor | |
| CN105634373A (en) | Oil pumping unit centralized control special-purpose inversion control device | |
| CN205791789U (en) | Power station service power switching device | |
| CN203513001U (en) | Elevator integrated controller | |
| CN210693547U (en) | Motor comprehensive protection controller with anti-interference function | |
| CN211880322U (en) | Controller of square wave brushless direct current wind driven generator | |
| CN209963945U (en) | Digital power supply and starting circuit thereof | |
| CN112963340A (en) | Incoming water detection method for intelligent water pump of permanent magnet motor | |
| CN207637713U (en) | A kind of power control circuit suitable for electric locomotive contactor | |
| CN107666237A (en) | A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |