CN106357175B - Multi-gear speed control circuit of brushless DC motor - Google Patents
Multi-gear speed control circuit of brushless DC motor Download PDFInfo
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- CN106357175B CN106357175B CN201610886336.1A CN201610886336A CN106357175B CN 106357175 B CN106357175 B CN 106357175B CN 201610886336 A CN201610886336 A CN 201610886336A CN 106357175 B CN106357175 B CN 106357175B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
Abstract
The invention discloses a brushless direct current motor multi-gear speed control circuit, which comprises a direct current power supply; the JVM voltage stabilizing circuit is connected with the direct-current power supply, and the anti-crosstalk optical coupling isolation current amplification control relay switch circuit is used for controlling the direct-current power supply; the gear shifting control unit is connected with the anti-crosstalk optical coupling isolation current amplification control relay switch circuit; the optical coupling isolation DFG multi-gear speed command voltage synthesis output circuit is respectively connected with the JVM voltage stabilizing circuit and the anti-serial interference optical coupling isolation current amplification control relay switch circuit; the anti-serial interference optocoupler isolation current amplification control relay switch circuit and the optocoupler isolation DFG multi-gear speed command voltage synthesis output circuit are also respectively connected with the brushless DC motor. The motor has the advantages of small size, low manufacturing cost, long service life, simple and convenient speed regulation, and more abundant gear setting, and can adopt various speed regulation means according to different requirements. The motor has low dead weight, low noise, low power consumption and high efficiency.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a multi-gear speed control circuit for an air conditioner, a fan, an air purifier, an electric heater, an exhaust fan, a water-cooling fan and the like, in particular to a multi-gear speed control circuit for a brushless direct current motor, a direct current motor adopting the circuit, and an electric appliance and electric equipment adopting the motor.
Background
Most of air conditioners, fans, air purifiers, electric heaters, exhaust fans, water-cooled fan machines and the like in the prior art are driven by adopting alternating current motors, a plurality of different speed regulation steps are needed, the alternating current motors are required to realize the speed regulation steps, the motor coil brush number is generally changed, and if more speed steps are needed to be increased and the rotating speed is required to be accurate, the alternating current motor is difficult to manufacture. The AC motor is made of more steel and copper materials, so that the constitution is larger, the weight is heavier, and the AC motor has the defects of larger noise, more power consumption and low efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a brushless direct current motor multi-gear speed control circuit which has the same function and operation as an alternating current motor.
In order to achieve the above object, the present invention provides a brushless dc motor multi-speed control circuit comprising:
a direct current power supply;
the JVM voltage stabilizing circuit is connected with the direct-current power supply, and the anti-crosstalk optical coupling isolation current amplification control relay switch circuit is used for controlling the direct-current power supply;
the gear shifting control unit is connected with the anti-crosstalk optical coupling isolation current amplification control relay switch circuit;
the optical coupling isolation DFG multi-gear speed command voltage synthesis output circuit is respectively connected with the JVM voltage stabilizing circuit and the anti-serial interference optical coupling isolation current amplification control relay switch circuit;
the anti-serial interference optocoupler isolation current amplification control relay switch circuit and the optocoupler isolation DFG multi-gear speed command voltage synthesis output circuit are also respectively connected with the brushless DC motor.
Preferably, the anti-crosstalk optocoupler isolation current amplification control relay switch circuit is further connected with a starting acceleration voltage circuit, and the starting acceleration voltage circuit is connected with the optocoupler isolation DFG multi-gear speed command voltage synthesis output circuit.
Preferably, the direct current power supply is replaced by an alternating current power supply and a rectifying circuit.
Preferably, the negative input of the brushless DC motor D is connected with the negative input of the DC power supply,
the DFG speed command end of the brushless direct current motor is connected with an R1 resistor, a PS photo-coupling isolation PS4-4 pin, a PS3-4 pin, a PS2-4 pin, a PS1-4 pin, a DW voltage-stabilizing diode cathode, a C3 capacitor and an R2 resistor, and the other ends of the DW, the C3 and the R2 are connected with the input of a direct current power supply cathode;
the other end of the DFG speed command end connected with the R1 resistor is connected with the pin 1 of the normally closed contact of the KJ relay, the pin 2 of the normally closed contact of the KJ relay is connected with the pin 4 which is normally open of the KJ relay, the pin 8 of the coil of the KJ relay, the R4 resistor, the C1 capacitor, the pin 1 of the input end of the JVM three-terminal voltage-stabilizing tube and the power input FU current fuse;
the brushless direct current motor is connected with a normally open 3 pin of the KJ relay and is connected with the positive electrode of the direct current power supply through the KJ relay.
Preferably, the shift control unit comprises an IC singlechip, an SQP touch signal input circuit and a VD remote control signal input circuit.
Preferably, the SQP light touch signal input circuit or the VD remote controller signal input circuit inputs each function working instruction to the control IC singlechip, the 3 pin of the IC singlechip is connected with the cathode of the D1 diode and the PS1 photo-coupling isolation 2 pin, the 4 pin of the IC singlechip is connected with the cathode of the D2 diode and the PS2 photo-coupling isolation 2 pin, the 5 pin of the IC is connected with the cathode of the D3 diode and the PS3 photo-coupling isolation 2 pin, and the 6 pin of the IC is connected with the cathode of the D4 diode and the PS4 photo-coupling isolation 2 pin.
Preferably, the JVM voltage stabilizing circuit is a JVM three-terminal voltage stabilizing tube;
the positive electrode of the D1 diode, the D2 diode, the D3 diode and the D4 diode is connected with the pin 2 of the PS5 photo-coupling isolation circuit, the pin 1 of the PS5 photo-coupling isolation circuit is connected with the resistor R5, the other end of the resistor R5 is connected with the pin 3 of the JVM three-terminal voltage stabilizing tube output, the capacitor C2, the resistor R6, the resistor RW1, the resistor RW2, the resistor RW3, the resistor RW4 and the pin 1 of the IC singlechip, the other end of the capacitor C2, the resistor RW1, the resistor RW2, the resistor RW3 and the resistor RW4 are connected with the negative electrode input of the direct current power supply, the other end of the resistor R6 is connected with the pin 1 photo-coupling isolation 1, the pin 1 photo-coupling isolation 1 of PS3 photo-coupling isolation 1 and the pin 1 photo-coupling isolation 1 of PS4 photo-coupling isolation 1, the midpoint of the resistor RW1 is connected with the pin 3 of the photo-coupling isolation 3 of the JVM, the midpoint of the RW2 is connected with the pin 3 photo-coupling isolation 3 of the PS2, and the midpoint of the resistor RW3 is connected with the pin 3 photo-coupling isolation 3 of the resistor, and the midpoint of the 4 photo-adjustable resistor is connected with the pin 3 of the photo-coupling isolation 3 of PS4 isolation 3.
Preferably, the pin 4 of the PS5 optocoupler isolation circuit is connected with the base electrode of the VT triode b and the resistor R3 respectively, the other end of the resistor R3 is connected with the emitter electrode of the VT triode E and the cathode of the direct current power supply, and the collector electrode of the VT triode C is connected with the pin 9 of the KJ relay coil.
Furthermore, as an alternative, the shift control unit is controlled with a push-button switch or with a rotary switch.
The invention also provides a direct current motor, which adopts a brushless direct current motor multi-gear speed control circuit.
The invention also provides an electric appliance, which adopts a direct current motor as a driving mechanism to provide power. The useful electric appliances can be air conditioners, fans, air purifiers, electric heaters, exhaust fans, water-cooled fans and the like.
In the invention, the JVM three-stage voltage stabilizing tube can also be called a JVM voltage stabilizing circuit.
The beneficial effects of the invention are as follows: the motor has the advantages of small size, low manufacturing cost, long service life, simple and convenient speed regulation, and more abundant gear setting, and can adopt various speed regulation means according to different requirements. The motor has low dead weight, low noise, low power consumption and high efficiency.
Drawings
FIG. 1 is a circuit block diagram of an embodiment of the present invention;
FIG. 2 is a block diagram of a microcomputer control type circuit, which may also be referred to as an IC singlechip, according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a key switch control type according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a rotary switch control type;
reference numerals:
the optical coupling isolation DFG multi-gear speed command voltage synthesis output circuit 1;
a start-up accelerating voltage circuit 2;
the anti-crosstalk optical coupling isolation current amplification control relay switch circuit 3;
a DC power supply 4;
a JVM voltage stabilizing circuit 5;
a shift control unit 6;
a brushless dc motor 7.
For ease of understanding, some components used in the present invention are briefly described:
d ten DC power supply positive electrode input
D-DC power negative input
DCAM brushless DC motor, also called brushless DC motor
Negative electrode input end of D-negative brushless DC motor power supply
Positive electrode input end of D positive brushless DC motor power supply
Speed command input terminal for DFG brushless DC motor
FU current fuse
R resistor
C capacitor
VT semiconductor triode
KJ relay
JVM three-terminal voltage stabilizing tube
PS optical coupling isolation
D diode
RW adjustable resistor
DW voltage-stabilizing diode
IC single-chip microcomputer control unit
SQP tact signal input
VD remote controller signal input
kA key linkage switch
ka manually rotates the switch.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1, fig. 1 summarizes the circuit principles of the present invention, as follows: a brushless DC motor multi-gear speed control circuit comprises a DC power supply 4; the JVM voltage stabilizing circuit 5 is connected with the direct-current power supply 4, and the anti-crosstalk optical coupling isolation current amplification control relay switch circuit 3 is used for controlling the switching of the switch; a shift control unit 6 connected with the anti-crosstalk optical coupling isolation current amplification control relay switch circuit 3; the optocoupler isolation DFG multi-gear speed command voltage synthesis output circuit 1 is respectively connected with the JVM voltage stabilizing circuit 5 and the anti-serial interference optocoupler isolation current amplification control relay switch circuit 3; the anti-serial interference optocoupler isolation current amplification control relay switch circuit 3 and the optocoupler isolation DFG multi-gear speed command voltage synthesis output circuit 1 are also respectively connected with the brushless DC motor 7. The anti-crosstalk photo-coupling isolation current amplification control relay switch circuit 3 is further connected with the starting acceleration voltage circuit 2, and the starting acceleration voltage circuit 2 is connected with the photo-coupling isolation DFG multi-gear speed command voltage synthesis output circuit.
Circuit diagram element connection relation: the DC motor is characterized in that the D negative input of the DCAM brushless DC motor is connected with the negative input of a D DC power supply 4, the DFG speed command of the DCAM brushless DC motor is connected with an R1 resistor, a PS photo-coupling isolation PS4-4 pin, a PS3-4 pin, a PS2-4 pin, a PS1-4 pin, a DW voltage-stabilizing diode negative electrode, a C3 capacitor and an R2 resistor, the other ends of the DW, C3 and R2 are connected with the negative input of the D DC power supply 4, the other ends of the DFG speed command and the R1 are connected with a normally-closed contact 1 pin of a KJ relay, the normally-closed contact 2 pin of the KJ relay is connected with a normally-open 4 pin of the KJ relay, a coil 8 pin of the KJ relay, the R4 resistor, a C1 capacitor, a JVM three-terminal voltage-stabilizing tube input 1 pin and a power supply input FU current fuse, and the D positive power supply input of the DCAM brushless DC motor is connected with a normally-open 3 pin of the KJ relay. The SQP light touch signal input or the VD remote controller signal input controls each function work instruction of the IC singlechip unit, the 3 pin of the IC singlechip is connected with the cathode of the D1 diode and the PS1 photo-coupling isolation 2 pin, the 4 pin of the IC singlechip is connected with the cathode of the D2 diode and the PS2 photo-coupling isolation 2 pin, the 5 pin of the IC is connected with the cathode of the D3 diode and the PS3 photo-coupling isolation 2 pin, and the 6 pin of the IC is connected with the cathode of the D4 diode and the PS4 photo-coupling isolation 2 pin. The anodes of the diodes D1, D2, D3 and D4 are connected with the input of the diode PS5, the diode PS5 is connected with the resistor R5, the other end of the resistor R5 is connected with the output 3 pin of the JVM three-terminal voltage regulator, the capacitor C2, the resistor R6, the resistor RW1, the resistor RW2, the resistor RW3, the resistor RW4 and the control unit 1 pin of the IC singlechip, the other ends of the capacitor C2, the resistor RW1, the resistor RW2, the resistor RW3 and the resistor RW4 are connected with the input of the cathode D direct current power supply 4, the other end of the resistor R6 is connected with the input of the diode PS1, the resistor PS2 is connected with the resistor PS3, the midpoint of the resistor RW1 is connected with the resistor PS3, the midpoint of the resistor RW2 is connected with the resistor PS3, and the midpoint of the resistor is connected with the resistor PS 4. The PS5 photo-coupling isolation pin 4 is connected with the base electrode of the VT triode b and the R3 resistor, the other end of the R3 resistor is connected with the E emitter of the VT triode and the negative electrode of the D direct current power supply 4, and the collector electrode of the VT triode C is connected with the pin 9 of the KJ relay coil.
Schematic illustration of circuit diagram:
the DCAM brushless direct current motor is stopped or the speed is changed, the control unit of the IC single chip microcomputer is instructed to work by operating the soft touch SQP signal input or the VD remote controller signal input, when the instruction IC single chip microcomputer works on the DCAM brushless direct current motor, one of the pins 3, 4, 5 and 6 of the IC single chip microcomputer has negative voltage output, if the instruction IC single chip microcomputer stops working on the DCAM brushless direct current motor, the pins 3, 4, 5 and 6 of the IC single chip microcomputer have no negative voltage output, the pins 3, 4, 5 and 6 of the IC single chip microcomputer are respectively connected with the pins PS1, PS2, PS3 and PS4 of different gears in an optical coupling isolation mode, the pins PS1, PS2, PS3 and PS4 of different gears in an optical coupling isolation mode are connected with the R6 current limiting resistor, and the other end of the R6 current limiting resistor is connected with the positive voltage output of the pin 3 of the JVM three-terminal voltage stabilizing tube.
Setting an example; the output of the 3 feet of the IC single chip is high grade, the output of the 4 feet of the IC single chip is middle grade, the output of the 5 feet of the IC single chip is slow grade, the output of the 6 feet of the IC single chip is sleep grade, the IC single chip microcomputer 3 feet have negative voltage output, it is connected with the PS1 photo-coupling isolation 2 feet, the PS1 photo-coupling isolation 1 feet are connected with the R6 current limiting resistor, the other end of the R6 current limiting resistor is connected with the 3 feet positive voltage of the JVM three-terminal voltage stabilizing tube, the PS1 photo-coupling isolation 1 feet and the 2 feet generate loop current, the PS1 photo-coupling isolation 3 feet and the 4 feet are unidirectionally conducted, the positive voltage output by the JVM three-terminal voltage stabilizing tube 3 feet is connected with the RW1 adjustable resistor, the positive voltage change of the PS1 photo-coupling isolation 4 feet can be changed, the PS1 photo-coupling isolation 4 feet are connected with the DCAM brushless DC motor DFG speed command, the DCAM brushless DC motor DFG speed command obtains command voltage of high grade speed, and the DCAM brushless DC motor enters high grade speed operation. Adjusting RW adjustable resistance value can change the rotation speed of DCAM brushless DC motor
The DCAM brushless DC motor also needs a switch to switch on the DC power supply 4, and the switch is realized by controlling a KJ relay switch by a current amplifying circuit.
Setting an example; when the IC singlechip receives a working instruction, the IC singlechip works at the same speed, one of the pins 3, 4, 5 and 6 of the IC singlechip has a negative voltage output, the negative voltage is smoothly connected with the pin PS5 photo-coupling isolation 2 through one of the anti-series interference diodes D1, D2, D3 and D4, the pin PS5 photo-coupling isolation 1 is connected with the current limiting resistor R5, the other end of the current limiting resistor R5 is connected with the positive electrode output positive electrode of the JVM three-terminal voltage regulator 3, so that loop current is generated by the pins PS5 photo-coupling isolation 2 and 1, the pins PS5 photo-coupling isolation 3 and 4 are in unidirectional conduction, the base electrode of the VT triode b obtains direct current from the pin D tenth direct current power supply 4, the current fuse is connected with the current limiting R4, the pin PS5 photo-coupling isolation 3 and the pin 4, the pole E of the VT triode is conducted, the coil KJ relay obtains voltage, the pins 1 and 2 are normally open, the pins 3 and 4 are normally open, the DCAM brushless direct current motor obtains direct current input into the DC power supply of the DCAM. (R3 resistor is bias resistor of base electrode of VT triode b, and can be used for regulating current amplification gain of VT triode and raising stability of VT triode
In order to enable the DCAM brushless direct current motor to normally start under low-speed gear load, a starting accelerating voltage is specially increased, the starting accelerating voltage is composed of R1, R2 resistors, a C3 capacitor and a DW voltage stabilizing tube, before the DCAM brushless direct current motor works, the positive input of a D-tenth direct current power supply 4 is connected with a FU current limiting fuse, a normally closed switch 2 of a KJ relay is connected with a 1 pin, the other end of the R1 current limiting resistor is connected with a speed command input end of the DFG brushless direct current motor, a high potential positive voltage is obtained as a starting voltage at the DFG speed command input end of the DCAM brushless direct current motor, the high potential voltage is stored through the C3 capacitor, and in order to prevent the high potential voltage from exceeding a maximum voltage design value of the DFG speed command input, the DW voltage stabilizing diode is added into the DFG speed command input. When the DCAM brushless DC motor works, the pins 1 and 2 of the KJ relay switch are changed from conduction to non-conduction, the DFG speed command input cannot obtain the accelerating voltage from R1, the accelerating voltage is generated by discharging a C3 capacitor, and the starting accelerating speed and time can be adjusted by adjusting the capacitance of the C3 capacitor. (R2 is DFG speed command input bias shunt resistor, which can be omitted)
Referring to fig. 3, ka is a key linkage switch, k3, k4, k5, k6 are high, medium, low, slow gear shift speed regulation on-off keys, and kAo is a neutral reset linkage key. Wherein the KA switch characteristic is the same as a conventional fan speed-adjusting gear-shifting key switch.
DCAM brushless DC Ma manual rotary switch circuit with multi-gear speed regulation, please refer to FIG. 4, ka; is a manual rotary switch, k3, k4, k5, k6 are high, medium, low, slow manual rotary speed regulation switches, kao is a manual rotary switch neutral. The Ka switch characteristic is the same as that of a conventional manual rotation speed regulation switch of the ceiling fan.
The circuit uses the kA key linkage switch or the Ka manual rotary switch to carry out multi-gear speed gear shifting on the DCAM brushless DC motor module as the same as the IC single chip microcomputer control unit. The 3, 4, 5 and 6 pins of the IC singlechip control circuit diagram are also high, medium, low and slow gears. The IC single chip microcomputer control unit uses an intelligent semiconductor switch, and the KA key linkage switch and the Ka manual rotation switch are manually operated metal contact connection switches.
The invention also provides a direct current motor, which adopts a brushless direct current motor multi-gear speed control circuit.
The invention also provides an electric appliance, which adopts a direct current motor as a driving mechanism to provide power. The useful electric appliances can be air conditioners, fans, air purifiers, electric heaters, exhaust fans, water-cooled fans and the like.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (4)
1. A brushless dc motor multi-speed control circuit, comprising:
a direct current power supply;
the JVM voltage stabilizing circuit is connected with the direct-current power supply, and the anti-crosstalk optical coupling isolation current amplification control relay switch circuit is used for controlling the direct-current power supply;
the gear shifting control unit is connected with the anti-crosstalk optical coupling isolation current amplification control relay switch circuit;
the optical coupling isolation DFG multi-gear speed command voltage synthesis output circuit is respectively connected with the JVM voltage stabilizing circuit and the anti-serial interference optical coupling isolation current amplification control relay switch circuit;
the anti-serial interference optical coupling isolation current amplification control relay switch circuit and the optical coupling isolation DFG multi-gear speed command voltage synthesis output circuit are also respectively connected with the brushless direct current motor;
the negative input of the brushless DC motor D is connected with the negative input of the DC power supply,
the DFG speed command end of the brushless direct current motor is connected with an R1 resistor, a PS photo-coupling isolation PS4-4 pin, a PS3-4 pin, a PS2-4 pin, a PS1-4 pin, a DW voltage-stabilizing diode cathode, a C3 capacitor and an R2 resistor, and the other ends of the DW, the C3 and the R2 are connected with the input of a direct current power supply cathode;
the other end of the DFG speed command end connected with the R1 resistor is connected with the pin 1 of the normally closed contact of the KJ relay, the pin 2 of the normally closed contact of the KJ relay is connected with the pin 4 which is normally open of the KJ relay, the pin 8 of the coil of the KJ relay, the R4 resistor, the C1 capacitor, the pin 1 of the input end of the JVM three-terminal voltage-stabilizing tube and the power input FU current fuse;
the brushless direct current motor is connected with a normally open 3 pin of the KJ relay and is connected with the positive electrode of the direct current power supply through the KJ relay;
the shift control unit comprises an IC singlechip, an SQP light touch signal input circuit and a VD remote control signal input circuit;
the SQP light touch signal input circuit or the VD remote controller signal input circuit inputs each function working instruction to the control IC singlechip, the 3 pin of the IC singlechip is connected with the cathode of the D1 diode and the PS1 photo-coupling isolation 2 pin, the 4 pin of the IC singlechip is connected with the cathode of the D2 diode and the PS2 photo-coupling isolation 2 pin, the 5 pin of the IC is connected with the cathode of the D3 diode and the PS3 photo-coupling isolation 2 pin, and the 6 pin of the IC is connected with the cathode of the D4 diode and the PS4 photo-coupling isolation 2 pin;
the JVM voltage stabilizing circuit is a JVM three-terminal voltage stabilizing tube;
the positive electrode of the D1 diode, the D2 diode, the D3 diode and the D4 diode is connected with the pin 2 of the PS5 photo-coupling isolation circuit, the pin 1 of the PS5 photo-coupling isolation circuit is connected with the resistor R5, the other end of the resistor R5 is connected with the pin 3 of the JVM three-terminal voltage stabilizing tube output, the capacitor C2, the resistor R6, the resistor RW1, the resistor RW2, the resistor RW3, the resistor RW4 and the pin 1 of the IC singlechip, the other end of the capacitor C2, the resistor RW1, the resistor RW2, the resistor RW3 and the resistor RW4 are connected with the negative electrode input of the direct current power supply, the other end of the resistor R6 is connected with the pin 1 photo-coupling isolation 1, the pin 1 photo-coupling isolation 1 of PS3 photo-coupling isolation 1 and the pin 1 photo-coupling isolation 1 of PS4 photo-coupling isolation 1, the midpoint of the resistor RW1 is connected with the pin 3 of the photo-coupling isolation 3 of the JVM, the midpoint of the RW2 is connected with the pin 3 photo-coupling isolation 3 of the PS2, and the midpoint of the resistor RW3 is connected with the pin 3 photo-coupling isolation 3 of the resistor, and the midpoint of the 4 photo-adjustable resistor is connected with the pin 3 of the photo-coupling isolation 3 of PS4 isolation 3.
2. The brushless dc motor multi-speed control circuit according to claim 1, wherein the anti-series interference optocoupler isolation current amplification control relay switching circuit is further connected to a start-up accelerating voltage circuit, the start-up accelerating voltage circuit being connected to the optocoupler isolation DFG multi-speed command voltage combining output circuit.
3. The brushless dc motor multi-speed control circuit according to claim 1, wherein the dc power supply is replaced by an ac power supply and a rectifying circuit.
4. The brushless DC motor multi-speed control circuit according to claim 1, wherein,
and a pin 4 of the PS5 optical coupling isolation circuit is respectively connected with a base electrode of the VT triode b and a resistor R3, the other end of the resistor R3 is connected with an emitter electrode of the VT triode E and a negative electrode of a direct current power supply, and a collector electrode of the VT triode C is connected with a pin 9 of the KJ relay coil.
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| CN201610886336.1A CN106357175B (en) | 2016-10-10 | 2016-10-10 | Multi-gear speed control circuit of brushless DC motor |
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| CN102817860A (en) * | 2012-08-17 | 2012-12-12 | 佛山市顺德区海伦宝电器有限公司 | Multi-gear control circuit for air conditioner fan or fan |
| CN104039055A (en) * | 2014-06-25 | 2014-09-10 | 何祥喜 | Dual-purpose intelligent control circuit for lamp |
| CN105591456A (en) * | 2016-02-06 | 2016-05-18 | 广东顺德锐铂汇电子科技有限公司 | Alternating-current and direct-current high-low voltage power supply input and output intelligent detection output circuit |
| CN206099828U (en) * | 2016-10-10 | 2017-04-12 | 广东顺德锐铂汇电子科技有限公司 | Many grades of fast control circuit of brushless d. c. motor |
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Address after: No.46-9, Longyong Avenue, Huanglong village, Beijiao Town, Shunde District, Foshan City, Guangdong Province Applicant after: GUANGDONG SHUNDE RUIBOHUI ELECTRONICS TECHNOLOGY CO.,LTD. Address before: 528300 floor 1, building F, Guangdong Industrial Design City, No. 1, Sanle Road North, Beijiao Town, Shunde District, Foshan City, Guangdong Province Applicant before: GUANGDONG SHUNDE RUIBOHUI ELECTRONICS TECHNOLOGY CO.,LTD. |
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