CN112234873A - Direct current brushless motor controller suitable for cluster control and control system thereof - Google Patents
Direct current brushless motor controller suitable for cluster control and control system thereof Download PDFInfo
- Publication number
- CN112234873A CN112234873A CN202011246821.5A CN202011246821A CN112234873A CN 112234873 A CN112234873 A CN 112234873A CN 202011246821 A CN202011246821 A CN 202011246821A CN 112234873 A CN112234873 A CN 112234873A
- Authority
- CN
- China
- Prior art keywords
- unit
- motor controller
- pfc
- brushless motor
- pcb
- 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
- 238000004891 communication Methods 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000012937 correction Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/68—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more dc dynamo-electric motors
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/50—Reduction of harmonics
-
- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a direct current brushless motor controller suitable for cluster control and a control system thereof, and the direct current brushless motor controller comprises a PCB (printed circuit board), wherein the PCB is provided with an AC/DC unit, a PFC (power factor correction) adjusting unit, a DC/DC power supply unit and a DC/AC frequency conversion unit, the AC/DC unit and the PFC adjusting unit are arranged on the left side of the PCB and are arranged in front and at the back, the PFC adjusting unit, the DC/DC power supply unit and the DC/AC frequency conversion unit are all arranged on the rear side of the PCB and are arranged on the left and right, the right side of the AC/DC unit is provided with a communication unit and an auxiliary function unit which are arranged on the left and right, the rear side of the communication unit is provided with a processor unit, and the right. The invention has the beneficial effects that: the strong and weak current areas are clearly separated, the strong and weak current loops are concentrated on the left side of the PCB and flow along the plate edges, the heating devices are arranged along the plate edges, the heat dissipation of the devices is facilitated, the stability and the reliability of the system are improved, and the control system of the motor controller realizes large-scale and long-distance cluster control.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a direct current brushless motor controller suitable for cluster control and a control system thereof.
Background
A dc brushless motor, i.e., a BLDC motor, is composed of a motor main body and a motor controller, and is a typical mechatronic product. The direct current brushless motor can rapidly replace the traditional motor (such as an alternating current motor, a direct current brush motor and the like) in recent years by virtue of the remarkable high-efficiency energy-saving characteristic, and occupies the domestic motor market. The method has the advantages of high efficiency and energy conservation, is particularly prominent in a large-scale cluster control system, and can exert an optimal skill effect for an actual project, thereby realizing the control of the operation cost. There are two types of conventional dc brushless motor drivers (controllers): one is that only the motor drive circuit part is needed, namely only local single machine control is needed, remote control cannot be realized, and even group control of multiple devices cannot be realized; the other is that a motor driving circuit part integrates a remote control scheme based on simple electric signals (such as PWM duty ratio control, 0-10V voltage signal control and 4-20mA current signal control), but the circuit based on the simple electric signals has a limited transmission distance of a control link, generally the maximum distance is about 200 meters, the number of devices capable of being controlled simultaneously is limited, and the control cost is greatly increased along with the increase of the control number.
With the industrial development trend of 4.0 industry and the interconnection of everything, the requirement of large-scale (in tens of thousands) direct current brushless motor cluster control appears, and the original traditional direct current brushless motor control system cannot well meet the new trend.
Disclosure of Invention
The present invention is directed to a dc brushless motor controller and a control system thereof suitable for cluster control, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a direct current brushless motor controller suitable for cluster control, includes the PCB circuit board, the PCB circuit board is equipped with AC/DC unit, PFC adjusting element, DC/DC power supply unit and DC/AC frequency conversion unit, AC/DC unit and PFC adjusting element set up in the left side of PCB circuit board and set up around, PFC adjusting element, DC/DC power supply unit and DC/AC frequency conversion unit all set up in the rear side of PCB circuit board and control the setting, the right side of AC/DC unit is equipped with communication unit and the auxiliary function unit of arranging about, the rear side of communication unit is equipped with the treater unit, the right side of treater unit is equipped with motor state collection unit.
Further preferably, the AC/DC unit includes a full-wave rectifier, an AC filter, and a power supply terminal connected to a commercial power.
Preferably, the PFC adjustment unit includes a PFC inductor, a boost diode, a PFC switching tube, a PFC controller, and a large-capacity capacitor, and the PFC inductor, the boost diode, and the large-capacity capacitor are disposed along an edge of the PCB board.
Further preferably, the DC/AC frequency conversion unit is provided with a motor output interface, which is located on the right side of the PCB circuit board and connected with a BLDC motor.
Further preferably, the motor state collecting unit is provided with a motor input interface which is positioned on the right side of the PCB.
Further preferably, the communication unit is provided with a plurality of communication terminals, and is a plurality of the communication terminals are sequentially arranged along the front side edge of the PCB circuit board and are connected with an upper computer.
Preferably, the communication unit is buckled on the PCB in a buckle plate mode.
Further preferably, the processor unit is connected with the DC/AC frequency conversion unit, the motor state collection unit, the communication unit and the auxiliary function unit.
Further preferably, the auxiliary function unit is provided with an auxiliary interface.
The application also provides a control system suitable for direct current brushless motor controller of trunking control, including motor controller, converter, router and BLDC motor, the converter is connected with a plurality of routers, the router is connected with a plurality of motor controller, motor controller is connected with the BLDC motor.
Advantageous effects
The direct current brushless motor controller suitable for cluster control has the advantages that strong and weak current areas are clearly separated, a strong current loop is concentrated in the left side of a PCB circuit board and flows along the edge of the board, heating devices are arranged along the edge of the board, heat dissipation of the devices is facilitated, stability and reliability of the system are improved, the weak current area is located in the right side area of the PCB circuit board, operation interfaces are relatively concentrated, identification and user operation are easy, safety is high, a communication unit is designed in a pinch plate mode, rapid maintenance with minimum cost can be achieved, meanwhile, a control system of the direct current brushless motor controller realizes large-scale and long-distance cluster control, and cluster control of tens of thousands of motors can be supported.
Drawings
Fig. 1 is a layout diagram of a PCB circuit board of a dc brushless motor controller according to an embodiment of the present invention;
fig. 2 is a control schematic diagram of a dc brushless motor controller according to an embodiment of the present invention;
fig. 3 is a circuit diagram illustrating the operation of the AC/DC unit and the PFC adjustment unit of the DC brushless motor controller according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a group control networking of a control system of a dc brushless motor controller according to an embodiment of the present invention.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, a DC brushless motor controller suitable for cluster control includes a PCB circuit board, the PCB circuit board is provided with an AC/DC unit, a PFC adjustment unit, a DC/DC power supply unit and a DC/AC frequency conversion unit, the AC/DC unit and the PFC adjustment unit are disposed on the left side of the PCB circuit board and are disposed in front of and behind the PCB circuit board, the PFC adjustment unit, the DC/DC power supply unit and the DC/AC frequency conversion unit are disposed on the rear side of the PCB circuit board and are disposed on the left and right sides, the right side of the AC/DC unit is provided with a communication unit and an auxiliary function unit arranged on the left and right sides, the rear side of the communication unit is provided with a processor unit, and the right side of the processor unit is provided with.
In the application, a mains supply is accessed from a power supply terminal of an AC/DC unit, electromagnetic interference on a connecting line is filtered by an EMI filter in the AC filter, the rectified voltage is converted into pulsating direct-current voltage by a full-wave rectifier device, the pulsating direct-current voltage is sent to a PFC (power factor correction) adjusting unit to be adjusted, then an adjusted bus power supply is sent to a DC/AC frequency conversion unit, a PWM (pulse width modulation) control signal is transmitted by a processor unit based on state information fed back by a motor collected by a motor state collecting unit, the PWM control signal is sent to the DC/AC frequency conversion unit, then the conduction and the cut-off of an IPM (intelligent power module) internal power tube of the DC/AC frequency conversion unit are controlled, and the frequency conversion control of a BLDC motor (. The communication unit is used for the controller to receive the control command issued by the upper computer remotely so as to execute corresponding operation, and the auxiliary function unit is used for providing information or controlling to the outside.
In this application, the strong and weak electric domain of PCB circuit board is clear, AC/DC unit, PFC adjusting unit, DC/DC power supply unit and DC/AC frequency conversion unit are strong electric current return circuit unit, concentrate on the left side and the rear side of PCB circuit board, and the board limit circulation along the PCB circuit board is the strong electric current region, full wave rectifier device, PFC inductance, PFC switch tube, PFC boost diode and DC/AC frequency conversion unit's power device sets up in the board limit of PCB circuit board for the device that generates heat, is favorable to the heat dissipation of device, the stability and the reliability of reinforcing controller system. The communication unit, the auxiliary function unit, the processor unit and the motor state collecting unit are concentrated in the right side and the front side area of the PCB, the operation interfaces of a user are relatively concentrated and are far away from a strong current area, and the safety performance of the controller when an external device is connected is improved.
Preferably, the AC/DC unit includes a full-wave rectifier, an AC filter and a power supply terminal connected in sequence from left to right, the power supply terminal is connected with the commercial power, the power supply terminal is placed near the low-voltage weak current side, and the safety performance is enhanced.
Preferably, the PFC adjustment unit includes a PFC inductor, a boost diode, a PFC switching tube, a PFC controller, and a large-capacity capacitor, and the PFC inductor, the boost diode, and the large-capacity capacitor are disposed along an edge of the PCB board. The PFC adjusting unit is of a boost topological structure, the PFC inductor, the boost diode, the PFC switch tube and the PFC controller form a PFC switch circuit, the conduction of the PFC switch tube is controlled through the PFC controller, so that input current can track the change of input voltage, the PFC inductor stores energy when the PFC switch tube is conducted, when the PFC switch tube is cut off, positive right and negative left voltage is induced on the PFC inductor, the capacitor is charged through the boost diode by the stored energy when the PFC inductor is conducted, and the energy is output. The PFC adjusting unit controls the input current waveform to enable the input current waveform to be synchronous with the input voltage waveform, and therefore the purpose of suppressing harmonic waves and improving power factors is achieved.
Preferably, the DC/AC frequency conversion unit is provided with a motor output interface, which is located on the right side of the PCB circuit board and connected with a BLDC motor for frequency conversion control of the BLDC motor.
Preferably, the motor state collecting unit is provided with a motor input interface, which is located on the right side of the PCB circuit board and is used for receiving information fed back by the BLDC motor, and the information is collected by the motor state collecting unit and sent to the processor unit. The motor input interface and the motor output interface are positioned on the same side of the PCB, so that the connection with the BLDC motor is facilitated.
Preferably, the communication unit is equipped with a plurality of communication terminals, and is a plurality of the communication terminal sets gradually along the preceding side edge of PCB circuit board, and is connected with the host computer. A plurality of the communication terminal positions are concentrated, so that the identification is easy, and the user operation is easy.
Preferably, the communication unit is buckled on the PCB circuit board by adopting a buckle plate type design. Because the bus connection distance of communication physics can be very long, the distance between two nodes can reach kilometers, the communication unit can be damaged due to potential difference, lightning stroke and other conditions, and the communication unit in the form of the buckle plate is simple and convenient to replace and maintain, and can realize quick maintenance with minimum cost.
Preferably, the processor unit is connected with the DC/AC frequency conversion unit, the motor state collection unit, the communication unit and the auxiliary function unit, and is used for calculating, analyzing, processing and sending instructions of signals.
Preferably, the auxiliary function unit is provided with an auxiliary interface for providing information or control to the outside, such as connection of a dry contact for alarm purpose, connection of a nixie tube for status display, and the like.
The utility model provides a control system suitable for direct current brushless motor controller of trunking control, includes motor controller, converter, router and BLDC motor, the converter is connected with a plurality of routers, the router is connected with a plurality of motor controller, motor controller is connected with the BLDC motor.
The application motor controller's control system, the converter is used for converting the instruction of host computer into balanced differential RS485 or RS422 signal, then transmits to a plurality of motor controller, one by a plurality of routers a plurality of motor controller can be connected to the router, and every motor controller all is connected with a BLDC motor, and then realizes the control system of the direct current brushless motor controller of extensive cluster control, the router is by the drive loading capacity of intermediate equipment such as relays amplifier bus to realize remote bus communication, guarantee that the command signal that the host computer sent can accurately convey to the BLDC motor. The converter forms one deck bus structure with a plurality of routers between, one the converter is 254 routers of joinable at most, the router forms two layers of bus structures with a plurality of motor controller, one the router is 254 motor controller of joinable at most, realizes 254 BLDC motor's connection, and then realizes the connection of a host computer and 64516 BLDC motors, forms the control system of cluster control's DC brushless motor controller.
In the application, the remote control interface of the motor controller adopts remote control based on a serial communication bus structure (such as RS232, RS485 and CAN) and according to a serial communication protocol (such as modbus protocol and possible proprietary protocol).
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.
Claims (10)
1. The utility model provides a DC brushless motor controller suitable for trunking control, includes the PCB circuit board, its characterized in that: the PCB circuit board is provided with an AC/DC unit, a PFC adjusting unit, a DC/DC power supply unit and a DC/AC frequency conversion unit, the AC/DC unit and the PFC adjusting unit are arranged on the left side of the PCB circuit board and are arranged in the front and at the back, the PFC adjusting unit, the DC/DC power supply unit and the DC/AC frequency conversion unit are arranged on the rear side of the PCB circuit board and are arranged in the left and right, a communication unit and an auxiliary function unit which are arranged in the left and right are arranged on the right side of the AC/DC unit, a processor unit is arranged on the rear side of the communication unit, and a motor state collecting unit is arranged on the right side of.
2. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the AC/DC unit comprises a full-wave rectifying device, an AC filter and a power supply terminal which are connected in sequence from left to right, and the power supply terminal is connected with commercial power.
3. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the PFC adjusting unit comprises a PFC inductor, a boost diode, a PFC switch tube, a PFC controller and a large-capacity capacitor, and the PFC inductor, the boost diode and the large-capacity capacitor are arranged along the edge of the PCB.
4. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the DC/AC frequency conversion unit is provided with a motor output interface which is positioned on the right side of the PCB and is connected with a BLDC motor.
5. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the motor state collecting unit is provided with a motor input interface which is positioned on the right side of the PCB.
6. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the communication unit is equipped with a plurality of communication terminals, and is a plurality of communication terminal sets gradually along the preceding side edge of PCB circuit board, and is connected with the host computer.
7. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the communication unit is buckled on the PCB circuit board by adopting a buckle plate type design.
8. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the processor unit is connected with the DC/AC frequency conversion unit, the motor state collection unit, the communication unit and the auxiliary function unit.
9. A dc brushless motor controller adapted for cluster control according to claim 1, wherein: the auxiliary function unit is provided with an auxiliary interface.
10. A control system of a dc brushless motor controller adapted for cluster control according to any of claims 1-9, characterized by: including motor controller, converter, router and BLDC motor, the converter is connected with a plurality of routers, the router is connected with a plurality of motor controller, motor controller is connected with the BLDC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246821.5A CN112234873A (en) | 2020-11-10 | 2020-11-10 | Direct current brushless motor controller suitable for cluster control and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246821.5A CN112234873A (en) | 2020-11-10 | 2020-11-10 | Direct current brushless motor controller suitable for cluster control and control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112234873A true CN112234873A (en) | 2021-01-15 |
Family
ID=74122563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011246821.5A Pending CN112234873A (en) | 2020-11-10 | 2020-11-10 | Direct current brushless motor controller suitable for cluster control and control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112234873A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113473697A (en) * | 2021-07-13 | 2021-10-01 | 广东汇芯半导体有限公司 | Frequency conversion controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860123A (en) * | 2009-04-13 | 2010-10-13 | 中山大洋电机股份有限公司 | Motor and control method thereof and cluster control system for multiple motors |
| CN102689601A (en) * | 2012-06-11 | 2012-09-26 | 浙江海康集团有限公司 | Integrated control system for new energy vehicles |
| CN103138558A (en) * | 2011-12-05 | 2013-06-05 | 美固电子(深圳)有限公司 | Alternating current /direct current (AC/DC) dual-purpose compressor speed setting controller |
| CN213783166U (en) * | 2020-11-10 | 2021-07-23 | 苏州骋研电子技术有限公司 | Direct current brushless motor controller suitable for cluster control and control system thereof |
-
2020
- 2020-11-10 CN CN202011246821.5A patent/CN112234873A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860123A (en) * | 2009-04-13 | 2010-10-13 | 中山大洋电机股份有限公司 | Motor and control method thereof and cluster control system for multiple motors |
| CN103138558A (en) * | 2011-12-05 | 2013-06-05 | 美固电子(深圳)有限公司 | Alternating current /direct current (AC/DC) dual-purpose compressor speed setting controller |
| CN102689601A (en) * | 2012-06-11 | 2012-09-26 | 浙江海康集团有限公司 | Integrated control system for new energy vehicles |
| CN213783166U (en) * | 2020-11-10 | 2021-07-23 | 苏州骋研电子技术有限公司 | Direct current brushless motor controller suitable for cluster control and control system thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李海燕等: "基于LabVIEW的电机集群控制系统", 《电气传动自动化》, vol. 32, no. 6, 1 December 2010 (2010-12-01), pages 9 - 12 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113473697A (en) * | 2021-07-13 | 2021-10-01 | 广东汇芯半导体有限公司 | Frequency conversion controller |
| CN113473697B (en) * | 2021-07-13 | 2024-06-11 | 广东汇芯半导体有限公司 | Variable frequency controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100507590C (en) | Multiple input path modular high frequency isolation single phase power feedback type electronic load | |
| CN201072438Y (en) | Multi-input channel modularized high-frequency isolation single phase electric energy feedback type electronic load | |
| CN201378812Y (en) | Power-supply control device and ventilation and air-exchange device employing same | |
| CN205407374U (en) | A high -efficient direct current module of charging for electric automobile fills electric pile | |
| CN205666668U (en) | Parallelly connected high efficiency of flow equalizing of modularization of crisscross mode module of charging | |
| CN202514092U (en) | Industrial electromagnetic heating controller | |
| CN101309529A (en) | Intelligent control apparatus and method for high-power energy saving electromagnetic stove | |
| CN104124750B (en) | A kind of intelligent sinewave output uninterrupted power source and autocontrol method | |
| CN103813595A (en) | Efficient power source capable of supplying electricity in constant voltage and constant current alternation mode | |
| CN202840661U (en) | Low standby power consumption electromagnetic oven circuit | |
| CN201054545Y (en) | Middle power multi-channel output thin switch power supply | |
| CN104135027B (en) | Photovoltaic variable frequency air conditioner and power supply control method thereof | |
| CN206100548U (en) | Electrical power generating system based on ARM control system realizes drive of single -stage PFCLED | |
| CN201699602U (en) | High power single circuit inverse soft switch arc welding power source | |
| CN213783166U (en) | Direct current brushless motor controller suitable for cluster control and control system thereof | |
| CN102371416B (en) | Single-switch energy-saving inverter welding machine | |
| CN202168034U (en) | Direct-current variable-frequency air conditioner | |
| CN112234873A (en) | Direct current brushless motor controller suitable for cluster control and control system thereof | |
| CN102281010A (en) | High-power single-loop contravariance soft switching arc welding power supply | |
| CN219513975U (en) | Programmable power supply device | |
| CN205142009U (en) | Intelligence switch power control system | |
| CN107070218B (en) | High-power soft switch chopper circuit | |
| CN206332618U (en) | A kind of intelligent sine voltage change-over circuit for bridge of being enjoyed a double blessing based on PFC | |
| CN205105134U (en) | Multi-controller system and electric control system used for same | |
| CN209170238U (en) | A kind of LED display power supply unit and system |
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 |