CN209278189U - Fan of refrigerator fast custom rated speed circuit - Google Patents
Fan of refrigerator fast custom rated speed circuit Download PDFInfo
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- CN209278189U CN209278189U CN201821974012.4U CN201821974012U CN209278189U CN 209278189 U CN209278189 U CN 209278189U CN 201821974012 U CN201821974012 U CN 201821974012U CN 209278189 U CN209278189 U CN 209278189U
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Abstract
A kind of fan of refrigerator fast custom rated speed circuit, comprising: driving circuit, driving circuit are electrically connected with three-phase coil；Square wave generation circuit, square wave generation circuit are electrically connected with driving circuit.The utility model fan of refrigerator is with fast custom rated speed circuit by adjusting the duty ratio of the output pwm signal of 555 side's wave generation circuits, a kind of coil of the number of turns can be passed through, realize the product demand of a variety of revolving speeds, it is adjusted the speed additionally, due to using internal PWM, the initial maximum revolving speed of motor can be determined more relatively high, at this moment less for the coil turn requirement of motor, effectively improve the winding efficiency of single-item electrical-coil.
Description
Technical field
The utility model relates to electricity field more particularly to refrigerator fan motor driving circuit, especially a kind of refrigerator wind
Fan fast custom rated speed circuit.
Background technique
In the prior art, air cooling type refrigerator promotes gas in refrigerator to flow using fan, and gas is realized when passing through evaporator
Refrigeration cool-down.Since without inside PWM speed-regulating signal occurs for refrigerator fan motor itself, motor operating is according to driving chip reality
Operating voltage 100% be output to electrical-coil, motor operating state is full speed running, the revolving speed of customization customer requirement, only
The rated speed of requirement is realized by adjusting the number of turns of motor three-phase coil, in this way since there are many not for the motor of different model
Same revolving speed requirement causes coil winding machine workshop to need to produce the coil of various different the number of turns, more particular for some the number of turns
Model, production efficiency are low.Meanwhile the initial maximum revolving speed of motor is lower, needs more electrical-coil the number of turns that could improve
The initial maximum revolving speed of motor, therefore the winding efficiency of single-item electrical-coil is low.
Utility model content
In view of the above technical problems, the purpose of this utility model is to provide a kind of specified turn of fan of refrigerator fast custom
Fast circuit.
In order to solve the above technical problems, the fan of refrigerator of the utility model fast custom rated speed circuit, comprising: drive
Dynamic circuit, driving circuit are electrically connected with three-phase coil；Square wave generation circuit, square wave generation circuit are electrically connected with driving circuit；Its
Middle side's wave generation circuit includes: chip U1, and the OUT pin of chip U1 is electrically connected with driving circuit, and the CONT pin of chip U1 is logical
Capacitor C2 ground connection, the GND pin ground connection of chip U1 are crossed, the TRIG pin of chip U1 is grounded by capacitor C1, chip U1's
THR ESHOLD pin is grounded by capacitor C1, the external 5V voltage of the RESET pin of chip U1, outside the VCC pin of chip U1
Connect 5V voltage；Resistor R1, the external 5V voltage in one end of resistor R1, the other end of resistor R1 and the DISC pin of chip U1
Electrical connection；One end of resistor R2, resistor R2 are electrically connected with the other end of resistor R1, the other end and chip of resistor R2
The THR ESHOLD pin electrical connection of the TRIG pin and chip U1 of U1；The model NE555 of chip U1.
Driving circuit includes: chip U2, and U pin, V pin and the W pin of chip U2 is electrically connected with three-phase coil respectively, core
The external 5V voltage of the VREG pin of piece U2, the VREG pin of chip U2 are grounded by capacitor C3, and the GND pin of chip U2 connects
Ground, the PWM pin of chip U2 are electrically connected with the OUT pin of chip U1；The model BD63281 or BD63242 of chip U2.
It further include external connection pin J1, extraneous power supply is electrically connected by external connection pin J1 and the VCC pin of chip U2
It connects, the GND pin ground connection of external connection pin J1.
The voltage of extraneous power supply is 12V.
The fan of refrigerator of the utility model is with fast custom rated speed circuit by adjusting the defeated of 555 side's wave generation circuits
The duty ratio of pwm signal out can realize the product demand of a variety of revolving speeds, additionally, due to use by a kind of coil of the number of turns
Internal PWM speed regulation, the initial maximum revolving speed of motor can be determined higher, at this moment less for the coil turn requirement of motor, from
And effectively improve the winding efficiency of single-item electrical-coil.
Detailed description of the invention
Fig. 1 is the fan of refrigerator fast custom rated speed circuit diagram of the utility model.
Specific embodiment
The utility model fan of refrigerator fast custom rated speed circuit is made further specifically with reference to the accompanying drawing
It is bright.
As shown in Figure 1, the utility model fan of refrigerator fast custom rated speed circuit, comprising: driving circuit, driving
Circuit is electrically connected with three-phase coil；
Square wave generation circuit, square wave generation circuit are electrically connected with driving circuit；Wherein
Square wave generation circuit includes:
The OUT pin of chip U1, chip U1 are electrically connected with driving circuit, and the CONT pin of chip U1 is connect by capacitor C2
Ground, the GND pin ground connection of chip U1, the TRIG pin of chip U1 are grounded by capacitor C1, the THRESHOLD pin of chip U1
It is grounded by capacitor C1, the external 5V voltage of the RESET pin of chip U1, the external 5V voltage of the VCC pin of chip U1；
Resistor R1, the external 5V voltage in one end of resistor R1, the other end of resistor R1 and the DISC pin of chip U1
Electrical connection；
One end of resistor R2, resistor R2 are electrically connected with the other end of resistor R1, the other end and core of resistor R2
The THRESHOLD pin electrical connection of the TRIG pin and chip U1 of piece U1；
The model NE555 of chip U1.
Driving circuit includes:
U pin, V pin and the W pin of chip U2, chip U2 are electrically connected with three-phase coil respectively, and the VREG of chip U2 draws
The external 5V voltage of foot, the VREG pin of chip U2 are grounded by capacitor C3, the GND pin ground connection of chip U2, the PWM of chip U2
Pin is electrically connected with the OUT pin of chip U1；
The model BD63281 or BD63242 of chip U2.
It further include external connection pin J1, extraneous power supply is electrically connected by external connection pin J1 and the VCC pin of chip U2
It connects, the GND pin ground connection of external connection pin J1.
Extraneous power supply is 12V.
Working principle are as follows: chip U2(BD63281 or BD63242 is driven by motor in 555 side's wave generation circuits) pin
VREG provides 5V reference power supply, and the square-wave signal of frequency 10Khz or so is obtained by adjusting capacitor C1 and resistor R2
(5V), then the resistor combination of resistor values and resistor R2 by adjusting resistor R1, Lai Shixian PWM square-wave signal
8.3%~91.7% change in duty cycle range (the OUT pin of chip U1 exports PWM square-wave signal), the PWM square-wave signal is by core
It is BD63281 or BD63242 that piece U1, which is exported to the pwm control signal input pin PWM(motor drive ic U2 of chip U2), it is defeated
The PWM square-wave signal for entering how many duty ratio determines the number for the average voltage that driving chip is loaded on electrical-coil.With this
It realizes the coil using same the number of turns, by adjusting the output duty cycle of the PWM square-wave signal of 555 side's wave generation circuits, comes
To the rated speed of different demands.
1. outside 12V DC power supply passes through J1 connection.
2. the 12V power supply motor drive ic U2(BD63281/BD63242 loaded on the J1 of external connection port).
3. having LDO inside chip U2, VREG pin exports 5V reference power supply and gives chip U1(NE555 chip), as
The working power of 555 side's wave generation circuits.
4. by adjusting resistor R1, resistor R2, the parameter of tri- capacitance resistance wares of capacitor C1, the OUT of chip U1 draws
Foot output frequency is 10KHz, 5V square-wave signal of the duty cycle range 8.3%~91.5%.
5. needing the rated speed customized, according to motor by adjusting the 5V square-wave signal of the OUT pin output of chip U1
Duty ratio, the square-wave signal, reload chip U2 PWM speed regulation pin PWM, chip U2 according to the PWM square wave of input believe
Number duty ratio, have adjusted the average voltage that driving chip U1 is loaded on electrical-coil, reduce the running speed of motor to needing
The rated speed wanted.
The preferred embodiment created to the utility model above is illustrated, but the utility model is created not
It is limited to the embodiment, those skilled in the art can also make under the premise of without prejudice to the utility model creative spirit
Various equivalent variation or replacement, these equivalent variation or replacement are all contained in the claim of this application limited range
It is interior.
Claims (4)
1. a kind of fan of refrigerator fast custom rated speed circuit characterized by comprising driving circuit, driving circuit with
Three-phase coil electrical connection；Square wave generation circuit, square wave generation circuit are electrically connected with driving circuit；Wherein square wave generation circuit packet
Include: the OUT pin of chip U1, chip U1 are electrically connected with driving circuit, and the CONT pin of chip U1 is grounded by capacitor C2, core
The GND pin of piece U1 is grounded, and the TRIG pin of chip U1 is grounded by capacitor C1, and the THRESHOLD pin of chip U1 passes through
Capacitor C1 ground connection, the external 5V voltage of the RESET pin of chip U1, the external 5V voltage of the VCC pin of chip U1；Resistor R1,
The external 5V voltage in one end of resistor R1, the other end of resistor R1 are electrically connected with the DISC pin of chip U1；Resistor R2, electricity
One end of resistance device R2 is electrically connected with the other end of resistor R1, the other end of resistor R2 and the TRIG pin of chip U1 and chip
The THR ESHOLD pin of U1 is electrically connected；The model NE555 of chip U1.
2. fan of refrigerator according to claim 1 fast custom rated speed circuit, which is characterized in that driving circuit packet
It includes:
U pin, V pin and the W pin of chip U2, chip U2 are electrically connected with three-phase coil respectively, outside the VREG pin of chip U2
5V voltage is connect, the VREG pin of chip U2 is grounded by capacitor C3, the GND pin ground connection of chip U2, the PWM pin of chip U2
It is electrically connected with the OUT pin of chip U1；
The model BD63281 or BD63242 of chip U2.
3. fan of refrigerator according to claim 2 fast custom rated speed circuit, which is characterized in that further include external
Pin J1 is connected, extraneous power supply is electrically connected by external connection pin J1 with the VCC pin of chip U2, external connection pin J1's
GND pin ground connection.
4. fan of refrigerator according to claim 3 fast custom rated speed circuit, which is characterized in that extraneous power supply
Voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974012.4U CN209278189U (en) | 2018-11-28 | 2018-11-28 | Fan of refrigerator fast custom rated speed circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974012.4U CN209278189U (en) | 2018-11-28 | 2018-11-28 | Fan of refrigerator fast custom rated speed circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209278189U true CN209278189U (en) | 2019-08-20 |
Family
ID=67608917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821974012.4U Active CN209278189U (en) | 2018-11-28 | 2018-11-28 | Fan of refrigerator fast custom rated speed circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209278189U (en) |
-
2018
- 2018-11-28 CN CN201821974012.4U patent/CN209278189U/en active Active
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